unofficial mirror of bug-gnu-emacs@gnu.org 
 help / color / mirror / code / Atom feed
blob 19ab0445b9c6c5ac8e100afc678bdd12f9ff3c12 167043 bytes (raw)
name: lisp/emacs-lisp/package.el 	 # note: path name is non-authoritative(*)

   1
   2
   3
   4
   5
   6
   7
   8
   9
  10
  11
  12
  13
  14
  15
  16
  17
  18
  19
  20
  21
  22
  23
  24
  25
  26
  27
  28
  29
  30
  31
  32
  33
  34
  35
  36
  37
  38
  39
  40
  41
  42
  43
  44
  45
  46
  47
  48
  49
  50
  51
  52
  53
  54
  55
  56
  57
  58
  59
  60
  61
  62
  63
  64
  65
  66
  67
  68
  69
  70
  71
  72
  73
  74
  75
  76
  77
  78
  79
  80
  81
  82
  83
  84
  85
  86
  87
  88
  89
  90
  91
  92
  93
  94
  95
  96
  97
  98
  99
 100
 101
 102
 103
 104
 105
 106
 107
 108
 109
 110
 111
 112
 113
 114
 115
 116
 117
 118
 119
 120
 121
 122
 123
 124
 125
 126
 127
 128
 129
 130
 131
 132
 133
 134
 135
 136
 137
 138
 139
 140
 141
 142
 143
 144
 145
 146
 147
 148
 149
 150
 151
 152
 153
 154
 155
 156
 157
 158
 159
 160
 161
 162
 163
 164
 165
 166
 167
 168
 169
 170
 171
 172
 173
 174
 175
 176
 177
 178
 179
 180
 181
 182
 183
 184
 185
 186
 187
 188
 189
 190
 191
 192
 193
 194
 195
 196
 197
 198
 199
 200
 201
 202
 203
 204
 205
 206
 207
 208
 209
 210
 211
 212
 213
 214
 215
 216
 217
 218
 219
 220
 221
 222
 223
 224
 225
 226
 227
 228
 229
 230
 231
 232
 233
 234
 235
 236
 237
 238
 239
 240
 241
 242
 243
 244
 245
 246
 247
 248
 249
 250
 251
 252
 253
 254
 255
 256
 257
 258
 259
 260
 261
 262
 263
 264
 265
 266
 267
 268
 269
 270
 271
 272
 273
 274
 275
 276
 277
 278
 279
 280
 281
 282
 283
 284
 285
 286
 287
 288
 289
 290
 291
 292
 293
 294
 295
 296
 297
 298
 299
 300
 301
 302
 303
 304
 305
 306
 307
 308
 309
 310
 311
 312
 313
 314
 315
 316
 317
 318
 319
 320
 321
 322
 323
 324
 325
 326
 327
 328
 329
 330
 331
 332
 333
 334
 335
 336
 337
 338
 339
 340
 341
 342
 343
 344
 345
 346
 347
 348
 349
 350
 351
 352
 353
 354
 355
 356
 357
 358
 359
 360
 361
 362
 363
 364
 365
 366
 367
 368
 369
 370
 371
 372
 373
 374
 375
 376
 377
 378
 379
 380
 381
 382
 383
 384
 385
 386
 387
 388
 389
 390
 391
 392
 393
 394
 395
 396
 397
 398
 399
 400
 401
 402
 403
 404
 405
 406
 407
 408
 409
 410
 411
 412
 413
 414
 415
 416
 417
 418
 419
 420
 421
 422
 423
 424
 425
 426
 427
 428
 429
 430
 431
 432
 433
 434
 435
 436
 437
 438
 439
 440
 441
 442
 443
 444
 445
 446
 447
 448
 449
 450
 451
 452
 453
 454
 455
 456
 457
 458
 459
 460
 461
 462
 463
 464
 465
 466
 467
 468
 469
 470
 471
 472
 473
 474
 475
 476
 477
 478
 479
 480
 481
 482
 483
 484
 485
 486
 487
 488
 489
 490
 491
 492
 493
 494
 495
 496
 497
 498
 499
 500
 501
 502
 503
 504
 505
 506
 507
 508
 509
 510
 511
 512
 513
 514
 515
 516
 517
 518
 519
 520
 521
 522
 523
 524
 525
 526
 527
 528
 529
 530
 531
 532
 533
 534
 535
 536
 537
 538
 539
 540
 541
 542
 543
 544
 545
 546
 547
 548
 549
 550
 551
 552
 553
 554
 555
 556
 557
 558
 559
 560
 561
 562
 563
 564
 565
 566
 567
 568
 569
 570
 571
 572
 573
 574
 575
 576
 577
 578
 579
 580
 581
 582
 583
 584
 585
 586
 587
 588
 589
 590
 591
 592
 593
 594
 595
 596
 597
 598
 599
 600
 601
 602
 603
 604
 605
 606
 607
 608
 609
 610
 611
 612
 613
 614
 615
 616
 617
 618
 619
 620
 621
 622
 623
 624
 625
 626
 627
 628
 629
 630
 631
 632
 633
 634
 635
 636
 637
 638
 639
 640
 641
 642
 643
 644
 645
 646
 647
 648
 649
 650
 651
 652
 653
 654
 655
 656
 657
 658
 659
 660
 661
 662
 663
 664
 665
 666
 667
 668
 669
 670
 671
 672
 673
 674
 675
 676
 677
 678
 679
 680
 681
 682
 683
 684
 685
 686
 687
 688
 689
 690
 691
 692
 693
 694
 695
 696
 697
 698
 699
 700
 701
 702
 703
 704
 705
 706
 707
 708
 709
 710
 711
 712
 713
 714
 715
 716
 717
 718
 719
 720
 721
 722
 723
 724
 725
 726
 727
 728
 729
 730
 731
 732
 733
 734
 735
 736
 737
 738
 739
 740
 741
 742
 743
 744
 745
 746
 747
 748
 749
 750
 751
 752
 753
 754
 755
 756
 757
 758
 759
 760
 761
 762
 763
 764
 765
 766
 767
 768
 769
 770
 771
 772
 773
 774
 775
 776
 777
 778
 779
 780
 781
 782
 783
 784
 785
 786
 787
 788
 789
 790
 791
 792
 793
 794
 795
 796
 797
 798
 799
 800
 801
 802
 803
 804
 805
 806
 807
 808
 809
 810
 811
 812
 813
 814
 815
 816
 817
 818
 819
 820
 821
 822
 823
 824
 825
 826
 827
 828
 829
 830
 831
 832
 833
 834
 835
 836
 837
 838
 839
 840
 841
 842
 843
 844
 845
 846
 847
 848
 849
 850
 851
 852
 853
 854
 855
 856
 857
 858
 859
 860
 861
 862
 863
 864
 865
 866
 867
 868
 869
 870
 871
 872
 873
 874
 875
 876
 877
 878
 879
 880
 881
 882
 883
 884
 885
 886
 887
 888
 889
 890
 891
 892
 893
 894
 895
 896
 897
 898
 899
 900
 901
 902
 903
 904
 905
 906
 907
 908
 909
 910
 911
 912
 913
 914
 915
 916
 917
 918
 919
 920
 921
 922
 923
 924
 925
 926
 927
 928
 929
 930
 931
 932
 933
 934
 935
 936
 937
 938
 939
 940
 941
 942
 943
 944
 945
 946
 947
 948
 949
 950
 951
 952
 953
 954
 955
 956
 957
 958
 959
 960
 961
 962
 963
 964
 965
 966
 967
 968
 969
 970
 971
 972
 973
 974
 975
 976
 977
 978
 979
 980
 981
 982
 983
 984
 985
 986
 987
 988
 989
 990
 991
 992
 993
 994
 995
 996
 997
 998
 999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
3853
3854
3855
3856
3857
3858
3859
3860
3861
3862
3863
3864
3865
3866
3867
3868
3869
3870
3871
3872
3873
3874
3875
3876
3877
3878
3879
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889
3890
3891
3892
3893
3894
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904
3905
3906
 
;;; package.el --- Simple package system for Emacs  -*- lexical-binding:t -*-

;; Copyright (C) 2007-2021 Free Software Foundation, Inc.

;; Author: Tom Tromey <tromey@redhat.com>
;;         Daniel Hackney <dan@haxney.org>
;; Created: 10 Mar 2007
;; Version: 1.1.0
;; Keywords: tools
;; Package-Requires: ((tabulated-list "1.0"))

;; This file is part of GNU Emacs.

;; GNU Emacs is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.

;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; GNU General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.

;;; Commentary:

;; The idea behind package.el is to be able to download packages and
;; install them.  Packages are versioned and have versioned
;; dependencies.  Furthermore, this supports built-in packages which
;; may or may not be newer than user-specified packages.  This makes
;; it possible to upgrade Emacs and automatically disable packages
;; which have moved from external to core.  (Note though that we don't
;; currently register any of these, so this feature does not actually
;; work.)

;; A package is described by its name and version.  The distribution
;; format is either a tar file or a single .el file.

;; A tar file should be named "NAME-VERSION.tar".  The tar file must
;; unpack into a directory named after the package and version:
;; "NAME-VERSION".  It must contain a file named "PACKAGE-pkg.el"
;; which consists of a call to define-package.  It may also contain a
;; "dir" file and the info files it references.

;; A .el file is named "NAME-VERSION.el" in the remote archive, but is
;; installed as simply "NAME.el" in a directory named "NAME-VERSION".

;; The downloader downloads all dependent packages.  By default,
;; packages come from the official GNU sources, but others may be
;; added by customizing the `package-archives' alist.  Packages get
;; byte-compiled at install time.

;; At activation time we will set up the load-path and the info path,
;; and we will load the package's autoloads.  If a package's
;; dependencies are not available, we will not activate that package.

;; Conceptually a package has multiple state transitions:
;;
;; * Download.  Fetching the package from ELPA.
;; * Install.  Untar the package, or write the .el file, into
;;   ~/.emacs.d/elpa/ directory.
;; * Autoload generation.
;; * Byte compile.  Currently this phase is done during install,
;;   but we may change this.
;; * Activate.  Evaluate the autoloads for the package to make it
;;   available to the user.
;; * Load.  Actually load the package and run some code from it.

;; Other external functions you may want to use:
;;
;; M-x list-packages
;;    Enters a mode similar to buffer-menu which lets you manage
;;    packages.  You can choose packages for install (mark with "i",
;;    then "x" to execute) or deletion (not implemented yet), and you
;;    can see what packages are available.  This will automatically
;;    fetch the latest list of packages from ELPA.
;;
;; M-x package-install-from-buffer
;;    Install a package consisting of a single .el file that appears
;;    in the current buffer.  This only works for packages which
;;    define a Version header properly; package.el also supports the
;;    extension headers Package-Version (in case Version is an RCS id
;;    or similar), and Package-Requires (if the package requires other
;;    packages).
;;
;; M-x package-install-file
;;    Install a package from the indicated file.  The package can be
;;    either a tar file or a .el file.  A tar file must contain an
;;    appropriately-named "-pkg.el" file; a .el file must be properly
;;    formatted as with package-install-from-buffer.

;;; Thanks:
;;; (sorted by sort-lines):

;; Jim Blandy <jimb@red-bean.com>
;; Karl Fogel <kfogel@red-bean.com>
;; Kevin Ryde <user42@zip.com.au>
;; Lawrence Mitchell
;; Michael Olson <mwolson@member.fsf.org>
;; Sebastian Tennant <sebyte@smolny.plus.com>
;; Stefan Monnier <monnier@iro.umontreal.ca>
;; Vinicius Jose Latorre <viniciusjl.gnu@gmail.com>
;; Phil Hagelberg <phil@hagelb.org>

;;; ToDo:

;; - putting info dirs at the start of the info path means
;;   users see a weird ordering of categories.  OTOH we want to
;;   override later entries.  maybe emacs needs to enforce
;;   the standard layout?
;; - put bytecode in a separate directory tree
;; - perhaps give users a way to recompile their bytecode
;;   or do it automatically when emacs changes
;; - give users a way to know whether a package is installed ok
;; - give users a way to view a package's documentation when it
;;   only appears in the .el
;; - use/extend checkdoc so people can tell if their package will work
;; - "installed" instead of a blank in the status column
;; - tramp needs its files to be compiled in a certain order.
;;   how to handle this?  fix tramp?
;; - maybe we need separate .elc directories for various emacs
;;   versions.  That way conditional compilation can work.  But would
;;   this break anything?
;; - William Xu suggests being able to open a package file without
;;   installing it
;; - Interface with desktop.el so that restarting after an install
;;   works properly
;; - Use hierarchical layout.  PKG/etc PKG/lisp PKG/info
;;   ... except maybe lisp?
;; - It may be nice to have a macro that expands to the package's
;;   private data dir, aka ".../etc".  Or, maybe data-directory
;;   needs to be a list (though this would be less nice)
;;   a few packages want this, eg sokoban
;; - Allow multiple versions on the server, so that if a user doesn't
;;   meet the requirements for the most recent version they can still
;;   install an older one.
;; - Allow optional package dependencies
;;   then if we require 'bbdb', bbdb-specific lisp in lisp/bbdb
;;   and just don't compile to add to load path ...?
;; - Our treatment of the info path is somewhat bogus

;;; Code:

(require 'cl-lib)
(eval-when-compile (require 'subr-x))
(eval-when-compile (require 'epg))      ;For setf accessors.
(require 'seq)

(require 'tabulated-list)
(require 'macroexp)
(require 'url-handlers)
(require 'browse-url)

(defgroup package nil
  "Manager for Emacs Lisp packages."
  :group 'applications
  :version "24.1")

\f
;;; Customization options

;;;###autoload
(defcustom package-enable-at-startup t
  "Whether to make installed packages available when Emacs starts.
If non-nil, packages are made available before reading the init
file (but after reading the early init file).  This means that if
you wish to set this variable, you must do so in the early init
file.  Regardless of the value of this variable, packages are not
made available if `user-init-file' is nil (e.g. Emacs was started
with \"-q\").

Even if the value is nil, you can type \\[package-initialize] to
make installed packages available at any time, or you can
call (package-initialize) in your init-file."
  :type 'boolean
  :version "24.1")

(defcustom package-load-list '(all)
  "List of packages for `package-initialize' to make available.
Each element in this list should be a list (NAME VERSION), or the
symbol `all'.  The symbol `all' says to make available the latest
installed versions of all packages not specified by other
elements.

For an element (NAME VERSION), NAME is a package name (a symbol).
VERSION should be t, a string, or nil.
If VERSION is t, the most recent version is made available.
If VERSION is a string, only that version is ever made available.
 Any other version, even if newer, is silently ignored.
 Hence, the package is \"held\" at that version.
If VERSION is nil, the package is not made available (it is \"disabled\")."
  :type '(repeat (choice (const all)
                         (list :tag "Specific package"
                               (symbol :tag "Package name")
                               (choice :tag "Version"
                                (const :tag "disable" nil)
                                (const :tag "most recent" t)
                                (string :tag "specific version")))))
  :risky t
  :version "24.1")

(defcustom package-archives `(("gnu" .
                               ,(format "http%s://elpa.gnu.org/packages/"
                                        (if (gnutls-available-p) "s" ""))))
  "An alist of archives from which to fetch.
The default value points to the GNU Emacs package repository.

Each element has the form (ID . LOCATION).
 ID is an archive name, as a string.
 LOCATION specifies the base location for the archive.
  If it starts with \"http(s):\", it is treated as an HTTP(S) URL;
  otherwise it should be an absolute directory name.
  (Other types of URL are currently not supported.)

Only add locations that you trust, since fetching and installing
a package can run arbitrary code.

HTTPS URLs should be used where possible, as they offer superior
security."
  :type '(alist :key-type (string :tag "Archive name")
                :value-type (string :tag "URL or directory name"))
  :risky t
  :version "26.1")                      ; gnutls test

(defcustom package-menu-hide-low-priority 'archive
  "If non-nil, hide low priority packages from the packages menu.
A package is considered low priority if there's another version
of it available such that:
    (a) the archive of the other package is higher priority than
    this one, as per `package-archive-priorities';
  or
    (b) they both have the same archive priority but the other
    package has a higher version number.

This variable has three possible values:
    nil: no packages are hidden;
    `archive': only criterion (a) is used;
    t: both criteria are used.

This variable has no effect if `package-menu--hide-packages' is
nil, so it can be toggled with \\<package-menu-mode-map>\\[package-menu-toggle-hiding]."
  :type '(choice (const :tag "Don't hide anything" nil)
                 (const :tag "Hide per package-archive-priorities"
                        archive)
                 (const :tag "Hide per archive and version number" t))
  :version "25.1")

(defcustom package-archive-priorities nil
  "An alist of priorities for packages.

Each element has the form (ARCHIVE-ID . PRIORITY).

When installing packages, the package with the highest version
number from the archive with the highest priority is
selected.  When higher versions are available from archives with
lower priorities, the user has to select those manually.

Archives not in this list have the priority 0, as have packages
that are already installed.  If you use negative priorities for
the archives, they will not be upgraded automatically.

See also `package-menu-hide-low-priority'."
  :type '(alist :key-type (string :tag "Archive name")
                :value-type (integer :tag "Priority (default is 0)"))
  :risky t
  :version "25.1")

(defcustom package-pinned-packages nil
  "An alist of packages that are pinned to specific archives.
This can be useful if you have multiple package archives enabled,
and want to control which archive a given package gets installed from.

Each element of the alist has the form (PACKAGE . ARCHIVE), where:
 PACKAGE is a symbol representing a package
 ARCHIVE is a string representing an archive (it should be the car of
an element in `package-archives', e.g. \"gnu\").

Adding an entry to this variable means that only ARCHIVE will be
considered as a source for PACKAGE.  If other archives provide PACKAGE,
they are ignored (for this package).  If ARCHIVE does not contain PACKAGE,
the package will be unavailable."
  :type '(alist :key-type (symbol :tag "Package")
                :value-type (string :tag "Archive name"))
  ;; This could prevent you from receiving updates for a package,
  ;; via an entry (PACKAGE . NON-EXISTING).  Which could be an issue
  ;; if PACKAGE has a known vulnerability that is fixed in newer versions.
  :risky t
  :version "24.4")

(defcustom package-user-dir (locate-user-emacs-file "elpa")
  "Directory containing the user's Emacs Lisp packages.
The directory name should be absolute.
Apart from this directory, Emacs also looks for system-wide
packages in `package-directory-list'."
  :type 'directory
  :risky t
  :version "24.1")

(defcustom package-directory-list
  ;; Defaults are subdirs named "elpa" in the site-lisp dirs.
  (let (result)
    (dolist (f load-path)
      (and (stringp f)
           (equal (file-name-nondirectory f) "site-lisp")
           (push (expand-file-name "elpa" f) result)))
    (nreverse result))
  "List of additional directories containing Emacs Lisp packages.
Each directory name should be absolute.

These directories contain packages intended for system-wide; in
contrast, `package-user-dir' contains packages for personal use."
  :type '(repeat directory)
  :risky t
  :version "24.1")

(declare-function epg-find-configuration "epg-config"
                  (protocol &optional no-cache program-alist))

(defcustom package-gnupghome-dir (expand-file-name "gnupg" package-user-dir)
  "Directory containing GnuPG keyring or nil.
This variable specifies the GnuPG home directory used by package.
That directory is passed via the option \"--homedir\" to GnuPG.
If nil, do not use the option \"--homedir\", but stick with GnuPG's
default directory."
  :type `(choice
          (const
           :tag "Default Emacs package management GnuPG home directory"
           ,(expand-file-name "gnupg" package-user-dir))
          (const
           :tag "Default GnuPG directory (GnuPG option --homedir not used)"
           nil)
          (directory :tag "A specific GnuPG --homedir"))
  :risky t
  :version "26.1")

(defcustom package-check-signature 'allow-unsigned
  "Non-nil means to check package signatures when installing.
More specifically the value can be:
- nil: package signatures are ignored.
- `allow-unsigned': install a package even if it is unsigned, but
  if it is signed, we have the key for it, and OpenGPG is
  installed, verify the signature.
- t: accept a package only if it comes with at least one verified signature.
- `all': same as t, except when the package has several signatures,
  in which case we verify all the signatures.

This also applies to the \"archive-contents\" file that lists the
contents of the archive."
  :type '(choice (const nil :tag "Never")
                 (const allow-unsigned :tag "Allow unsigned")
                 (const t :tag "Check always")
                 (const all :tag "Check all signatures"))
  :risky t
  :version "27.1")

(defun package-check-signature ()
  "Check whether we have a usable OpenPGP configuration.
If so, and variable `package-check-signature' is
`allow-unsigned', return `allow-unsigned', otherwise return the
value of variable `package-check-signature'."
  (if (eq package-check-signature 'allow-unsigned)
      (progn
        (require 'epg-config)
        (and (epg-find-configuration 'OpenPGP)
             'allow-unsigned))
    package-check-signature))

(defcustom package-unsigned-archives nil
  "List of archives where we do not check for package signatures.
This should be a list of strings matching the names of package
archives in the variable `package-archives'."
  :type '(repeat (string :tag "Archive name"))
  :risky t
  :version "24.4")

(defcustom package-selected-packages nil
  "Store here packages installed explicitly by user.
This variable is fed automatically by Emacs when installing a new package.
This variable is used by `package-autoremove' to decide
which packages are no longer needed.
You can use it to (re)install packages on other machines
by running `package-install-selected-packages'.

To check if a package is contained in this list here, use
`package--user-selected-p', as it may populate the variable with
a sane initial value."
  :version "25.1"
  :type '(repeat symbol))

(defcustom package-menu-async t
  "If non-nil, package-menu will use async operations when possible.
Currently, only the refreshing of archive contents supports
asynchronous operations.  Package transactions are still done
synchronously."
  :type 'boolean
  :version "25.1")

\f
;;; `package-desc' object definition
;; This is the struct used internally to represent packages.
;; Functions that deal with packages should generally take this object
;; as an argument.  In some situations (e.g. commands that query the
;; user) it makes sense to take the package name as a symbol instead,
;; but keep in mind there could be multiple `package-desc's with the
;; same name.

(defvar package--default-summary "No description available.")

(cl-defstruct (package-desc
               ;; Rename the default constructor from `make-package-desc'.
               (:constructor package-desc-create)
               ;; Has the same interface as the old `define-package',
               ;; which is still used in the "foo-pkg.el" files. Extra
               ;; options can be supported by adding additional keys.
               (:constructor
                package-desc-from-define
                (name-string version-string &optional summary requirements
                 &rest rest-plist
                 &aux
                 (name (intern name-string))
                 (version (version-to-list version-string))
                 (reqs (mapcar #'(lambda (elt)
                                   (list (car elt)
                                         (version-to-list (cadr elt))))
                               (if (eq 'quote (car requirements))
                                   (nth 1 requirements)
                                 requirements)))
                 (kind (plist-get rest-plist :kind))
                 (archive (plist-get rest-plist :archive))
                 (extras (let (alist)
                           (while rest-plist
                             (unless (memq (car rest-plist) '(:kind :archive))
                               (let ((value (cadr rest-plist)))
                                 (when value
                                   (push (cons (car rest-plist)
                                               (if (eq (car-safe value) 'quote)
                                                   (cadr value)
                                                 value))
                                         alist))))
                             (setq rest-plist (cddr rest-plist)))
                           alist)))))
  "Structure containing information about an individual package.
Slots:

`name'	Name of the package, as a symbol.

`version' Version of the package, as a version list.

`summary' Short description of the package, typically taken from
        the first line of the file.

`reqs'	Requirements of the package.  A list of (PACKAGE
        VERSION-LIST) naming the dependent package and the minimum
        required version.

`kind'	The distribution format of the package.  Currently, it is
        either `single' or `tar'.

`archive' The name of the archive (as a string) whence this
        package came.

`dir'	The directory where the package is installed (if installed),
        `builtin' if it is built-in, or nil otherwise.

`extras' Optional alist of additional keyword-value pairs.

`signed' Flag to indicate that the package is signed by provider."
  name
  version
  (summary package--default-summary)
  reqs
  kind
  archive
  dir
  extras
  signed)

(defun package--from-builtin (bi-desc)
  "Create a `package-desc' object from BI-DESC.
BI-DESC should be a `package--bi-desc' object."
  (package-desc-create :name (pop bi-desc)
                       :version (package--bi-desc-version bi-desc)
                       :summary (package--bi-desc-summary bi-desc)
                       :dir 'builtin))

;; Pseudo fields.
(defun package-version-join (vlist)
  "Return the version string corresponding to the list VLIST.
This is, approximately, the inverse of `version-to-list'.
\(Actually, it returns only one of the possible inverses, since
`version-to-list' is a many-to-one operation.)"
  (if (null vlist)
      ""
    (let ((str-list (list "." (int-to-string (car vlist)))))
      (dolist (num (cdr vlist))
        (cond
         ((>= num 0)
          (push (int-to-string num) str-list)
          (push "." str-list))
         ((< num -4)
          (error "Invalid version list `%s'" vlist))
         (t
          ;; pre, or beta, or alpha
          (cond ((equal "." (car str-list))
                 (pop str-list))
                ((not (string-match "[0-9]+" (car str-list)))
                 (error "Invalid version list `%s'" vlist)))
          (push (cond ((= num -1) "pre")
                      ((= num -2) "beta")
                      ((= num -3) "alpha")
                      ((= num -4) "snapshot"))
                str-list))))
      (if (equal "." (car str-list))
          (pop str-list))
      (apply #'concat (nreverse str-list)))))

(defun package-desc-full-name (pkg-desc)
  "Return full name of package-desc object PKG-DESC.
This is the name of the package with its version appended."
  (format "%s-%s"
          (package-desc-name pkg-desc)
          (package-version-join (package-desc-version pkg-desc))))

(defun package-desc-suffix (pkg-desc)
  "Return file-name extension of package-desc object PKG-DESC.
Depending on the `package-desc-kind' of PKG-DESC, this is one of:

   'single - \".el\"
   'tar    - \".tar\"
   'dir    - \"\"

Signal an error if the kind is none of the above."
  (pcase (package-desc-kind pkg-desc)
    ('single ".el")
    ('tar ".tar")
    ('dir "")
    (kind (error "Unknown package kind: %s" kind))))

(defun package-desc--keywords (pkg-desc)
  "Return keywords of package-desc object PKG-DESC.
These keywords come from the foo-pkg.el file, and in general
corresponds to the keywords in the \"Keywords\" header of the
package."
  (let ((keywords (cdr (assoc :keywords (package-desc-extras pkg-desc)))))
    (if (eq (car-safe keywords) 'quote)
        (nth 1 keywords)
      keywords)))

(defun package-desc-priority (pkg-desc)
  "Return the priority of the archive of package-desc object PKG-DESC."
  (package-archive-priority (package-desc-archive pkg-desc)))

(cl-defstruct (package--bi-desc
               (:constructor package-make-builtin (version summary))
               (:type vector))
  "Package descriptor format used in finder-inf.el and package--builtins."
  version
  reqs
  summary)

\f
;;; Installed packages
;; The following variables store information about packages present in
;; the system.  The most important of these is `package-alist'.  The
;; command `package-initialize' is also closely related to this
;; section, but it is left for a later section because it also affects
;; other stuff.

(defvar package--builtins nil
  "Alist of built-in packages.
The actual value is initialized by loading the library
`finder-inf'; this is not done until it is needed, e.g. by the
function `package-built-in-p'.

Each element has the form (PKG . PACKAGE-BI-DESC), where PKG is a package
name (a symbol) and DESC is a `package--bi-desc' structure.")
(put 'package--builtins 'risky-local-variable t)

(defvar package-alist nil
  "Alist of all packages available for activation.
Each element has the form (PKG . DESCS), where PKG is a package
name (a symbol) and DESCS is a non-empty list of `package-desc'
structures, sorted by decreasing versions.

This variable is set automatically by `package-load-descriptor',
called via `package-initialize'.  To change which packages are
loaded and/or activated, customize `package-load-list'.")
(put 'package-alist 'risky-local-variable t)

(defvar package-activated-list nil
  ;; FIXME: This should implicitly include all builtin packages.
  "List of the names of currently activated packages.")
(put 'package-activated-list 'risky-local-variable t)

;;;; Populating `package-alist'.

;; The following functions are called on each installed package by
;; `package-load-all-descriptors', which ultimately populates the
;; `package-alist' variable.

(defun package-process-define-package (exp)
  "Process define-package expression EXP and push it to `package-alist'.
EXP should be a form read from a foo-pkg.el file.
Convert EXP into a `package-desc' object using the
`package-desc-from-define' constructor before pushing it to
`package-alist'.

If there already exists a package by the same name in
`package-alist', insert this object there such that the packages
are sorted with the highest version first."
  (when (eq (car-safe exp) 'define-package)
    (let* ((new-pkg-desc (apply #'package-desc-from-define (cdr exp)))
           (name (package-desc-name new-pkg-desc))
           (version (package-desc-version new-pkg-desc))
           (old-pkgs (assq name package-alist)))
      (if (null old-pkgs)
          ;; If there's no old package, just add this to `package-alist'.
          (push (list name new-pkg-desc) package-alist)
        ;; If there is, insert the new package at the right place in the list.
        (while
            (if (and (cdr old-pkgs)
                     (version-list-< version
                                     (package-desc-version (cadr old-pkgs))))
                (setq old-pkgs (cdr old-pkgs))
              (push new-pkg-desc (cdr old-pkgs))
              nil)))
      new-pkg-desc)))

(defun package-load-descriptor (pkg-dir)
  "Load the package description file in directory PKG-DIR.
Create a new `package-desc' object, add it to `package-alist' and
return it."
  (let ((pkg-file (expand-file-name (package--description-file pkg-dir)
                                    pkg-dir))
        (signed-file (concat pkg-dir ".signed")))
    (when (file-exists-p pkg-file)
      (with-temp-buffer
        (insert-file-contents pkg-file)
        (goto-char (point-min))
        (let ((pkg-desc (or (package-process-define-package
                             (read (current-buffer)))
                            (error "Can't find define-package in %s" pkg-file))))
          (setf (package-desc-dir pkg-desc) pkg-dir)
          (if (file-exists-p signed-file)
              (setf (package-desc-signed pkg-desc) t))
          pkg-desc)))))

(defun package-load-all-descriptors ()
  "Load descriptors for installed Emacs Lisp packages.
This looks for package subdirectories in `package-user-dir' and
`package-directory-list'.  The variable `package-load-list'
controls which package subdirectories may be loaded.

In each valid package subdirectory, this function loads the
description file containing a call to `define-package', which
updates `package-alist'."
  (dolist (dir (cons package-user-dir package-directory-list))
    (when (file-directory-p dir)
      (dolist (subdir (directory-files dir))
        (unless (equal subdir "..")
          (let ((pkg-dir (expand-file-name subdir dir)))
            (when (file-directory-p pkg-dir)
              (package-load-descriptor pkg-dir))))))))

(defun package--alist ()
  "Return `package-alist', after computing it if needed."
  (or package-alist
      (progn (package-load-all-descriptors)
             package-alist)))

(defun define-package (_name-string _version-string
                                    &optional _docstring _requirements
                                    &rest _extra-properties)
  "Define a new package.
NAME-STRING is the name of the package, as a string.
VERSION-STRING is the version of the package, as a string.
DOCSTRING is a short description of the package, a string.
REQUIREMENTS is a list of dependencies on other packages.
 Each requirement is of the form (OTHER-PACKAGE OTHER-VERSION),
 where OTHER-VERSION is a string.

EXTRA-PROPERTIES is currently unused."
  ;; FIXME: Placeholder!  Should we keep it?
  (error "Don't call me!"))

\f
;;; Package activation
;; Section for functions used by `package-activate', which see.

(defun package-disabled-p (pkg-name version)
  "Return whether PKG-NAME at VERSION can be activated.
The decision is made according to `package-load-list'.
Return nil if the package can be activated.
Return t if the package is completely disabled.
Return the max version (as a string) if the package is held at a lower version."
  (let ((force (assq pkg-name package-load-list)))
    (cond ((null force) (not (memq 'all package-load-list)))
          ((null (setq force (cadr force))) t) ; disabled
          ((eq force t) nil)
          ((stringp force)              ; held
           (unless (version-list-= version (version-to-list force))
             force))
          (t (error "Invalid element in `package-load-list'")))))

(defun package-built-in-p (package &optional min-version)
  "Return non-nil if PACKAGE is built-in to Emacs.
Optional arg MIN-VERSION, if non-nil, should be a version list
specifying the minimum acceptable version."
  (if (package-desc-p package) ;; was built-in and then was converted
      (eq 'builtin (package-desc-dir package))
    (let ((bi (assq package package--builtin-versions)))
      (cond
       (bi (version-list-<= min-version (cdr bi)))
       ((remove 0 min-version) nil)
       (t
        (require 'finder-inf nil t) ; For `package--builtins'.
        (assq package package--builtins))))))

(defun package--autoloads-file-name (pkg-desc)
  "Return the absolute name of the autoloads file, sans extension.
PKG-DESC is a `package-desc' object."
  (expand-file-name
   (format "%s-autoloads" (package-desc-name pkg-desc))
   (package-desc-dir pkg-desc)))

(defun package--activate-autoloads-and-load-path (pkg-desc)
  "Load the autoloads file and add package dir to `load-path'.
PKG-DESC is a `package-desc' object."
  (let* ((old-lp load-path)
         (pkg-dir (package-desc-dir pkg-desc))
         (pkg-dir-dir (file-name-as-directory pkg-dir)))
    (with-demoted-errors "Error loading autoloads: %s"
      (load (package--autoloads-file-name pkg-desc) nil t))
    (when (and (eq old-lp load-path)
               (not (or (member pkg-dir load-path)
                        (member pkg-dir-dir load-path))))
      ;; Old packages don't add themselves to the `load-path', so we have to
      ;; do it ourselves.
      (push pkg-dir load-path))))

(defvar Info-directory-list)
(declare-function info-initialize "info" ())

(defvar package--quickstart-pkgs t
  "If set to a list, we're computing the set of pkgs to activate.")

(defun package--load-files-for-activation (pkg-desc reload)
  "Load files for activating a package given by PKG-DESC.
Load the autoloads file, and ensure `load-path' is setup.  If
RELOAD is non-nil, also load all files in the package that
correspond to previously loaded files."
  (let* ((loaded-files-list
          (when reload
            (package--list-loaded-files (package-desc-dir pkg-desc)))))
    ;; Add to load path, add autoloads, and activate the package.
    (package--activate-autoloads-and-load-path pkg-desc)
    ;; Call `load' on all files in `package-desc-dir' already present in
    ;; `load-history'.  This is done so that macros in these files are updated
    ;; to their new definitions.  If another package is being installed which
    ;; depends on this new definition, not doing this update would cause
    ;; compilation errors and break the installation.
    (with-demoted-errors "Error in package--load-files-for-activation: %s"
      (mapc (lambda (feature) (load feature nil t))
            ;; Skip autoloads file since we already evaluated it above.
            (remove (file-truename (package--autoloads-file-name pkg-desc))
                    loaded-files-list)))))

(defun package-activate-1 (pkg-desc &optional reload deps)
  "Activate package given by PKG-DESC, even if it was already active.
If DEPS is non-nil, also activate its dependencies (unless they
are already activated).
If RELOAD is non-nil, also `load' any files inside the package which
correspond to previously loaded files (those returned by
`package--list-loaded-files')."
  (let* ((name (package-desc-name pkg-desc))
         (pkg-dir (package-desc-dir pkg-desc)))
    (unless pkg-dir
      (error "Internal error: unable to find directory for `%s'"
             (package-desc-full-name pkg-desc)))
    (catch 'exit
      ;; Activate its dependencies recursively.
      ;; FIXME: This doesn't check whether the activated version is the
      ;; required version.
      (when deps
        (dolist (req (package-desc-reqs pkg-desc))
          (unless (package-activate (car req))
            (message "Unable to activate package `%s'.\nRequired package `%s-%s' is unavailable"
                     name (car req) (package-version-join (cadr req)))
            (throw 'exit nil))))
      (if (listp package--quickstart-pkgs)
          ;; We're only collecting the set of packages to activate!
          (push pkg-desc package--quickstart-pkgs)
        (package--load-files-for-activation pkg-desc reload))
      ;; Add info node.
      (when (file-exists-p (expand-file-name "dir" pkg-dir))
        ;; FIXME: not the friendliest, but simple.
        (require 'info)
        (info-initialize)
        (push pkg-dir Info-directory-list))
      (push name package-activated-list)
      ;; Don't return nil.
      t)))

(declare-function find-library-name "find-func" (library))

(defun package--list-loaded-files (dir)
  "Recursively list all files in DIR which correspond to loaded features.
Returns the `file-name-sans-extension' of each file, relative to
DIR, sorted by most recently loaded last."
  (let* ((history (delq nil
                        (mapcar (lambda (x)
                                  (let ((f (car x)))
                                    (and (stringp f)
                                         (file-name-sans-extension f))))
                                load-history)))
         (dir (file-truename dir))
         ;; List all files that have already been loaded.
         (list-of-conflicts
          (delq
           nil
           (mapcar
               (lambda (x) (let* ((file (file-relative-name x dir))
                             ;; Previously loaded file, if any.
                             (previous
                              (ignore-errors
                                (file-name-sans-extension
                                 (file-truename (find-library-name file)))))
                             (pos (when previous (member previous history))))
                        ;; Return (RELATIVE-FILENAME . HISTORY-POSITION)
                        (when pos
                          (cons (file-name-sans-extension file) (length pos)))))
             (directory-files-recursively dir "\\`[^\\.].*\\.el\\'")))))
    ;; Turn the list of (FILENAME . POS) back into a list of features.  Files in
    ;; subdirectories are returned relative to DIR (so not actually features).
    (let ((default-directory (file-name-as-directory dir)))
      (mapcar (lambda (x) (file-truename (car x)))
        (sort list-of-conflicts
              ;; Sort the files by ascending HISTORY-POSITION.
              (lambda (x y) (< (cdr x) (cdr y))))))))

;;;; `package-activate'
;; This function activates a newer version of a package if an older
;; one was already activated.  It also loads a features of this
;; package which were already loaded.
(defun package-activate (package &optional force)
  "Activate the package named PACKAGE.
If FORCE is true, (re-)activate it if it's already activated.
Newer versions are always activated, regardless of FORCE."
  (let ((pkg-descs (cdr (assq package package-alist))))
    ;; Check if PACKAGE is available in `package-alist'.
    (while
        (when pkg-descs
          (let ((available-version (package-desc-version (car pkg-descs))))
            (or (package-disabled-p package available-version)
                ;; Prefer a builtin package.
                (package-built-in-p package available-version))))
      (setq pkg-descs (cdr pkg-descs)))
    (cond
     ;; If no such package is found, maybe it's built-in.
     ((null pkg-descs)
      (package-built-in-p package))
     ;; If the package is already activated, just return t.
     ((and (memq package package-activated-list) (not force))
      t)
     ;; Otherwise, proceed with activation.
     (t (package-activate-1 (car pkg-descs) nil 'deps)))))

\f
;;; Installation -- Local operations
;; This section contains a variety of features regarding installing a
;; package to/from disk.  This includes autoload generation,
;; unpacking, compiling, as well as defining a package from the
;; current buffer.

;;;; Unpacking
(defvar tar-parse-info)
(declare-function tar-untar-buffer "tar-mode" ())
(declare-function tar-header-name "tar-mode" (tar-header) t)
(declare-function tar-header-link-type "tar-mode" (tar-header) t)

(defun package-untar-buffer (dir)
  "Untar the current buffer.
This uses `tar-untar-buffer' from Tar mode.  All files should
untar into a directory named DIR; otherwise, signal an error."
  (require 'tar-mode)
  (tar-mode)
  ;; Make sure everything extracts into DIR.
  (let ((regexp (concat "\\`" (regexp-quote (expand-file-name dir)) "/"))
        (case-fold-search (file-name-case-insensitive-p dir)))
    (dolist (tar-data tar-parse-info)
      (let ((name (expand-file-name (tar-header-name tar-data))))
        (or (string-match regexp name)
            ;; Tarballs created by some utilities don't list
            ;; directories with a trailing slash (Bug#13136).
            (and (string-equal dir name)
                 (eq (tar-header-link-type tar-data) 5))
            (error "Package does not untar cleanly into directory %s/" dir)))))
  (tar-untar-buffer))

(defun package--alist-to-plist-args (alist)
  (mapcar #'macroexp-quote
          (apply #'nconc
                 (mapcar (lambda (pair) (list (car pair) (cdr pair))) alist))))

(defun package-unpack (pkg-desc)
  "Install the contents of the current buffer as a package."
  (let* ((name (package-desc-name pkg-desc))
         (dirname (package-desc-full-name pkg-desc))
         (pkg-dir (expand-file-name dirname package-user-dir)))
    (pcase (package-desc-kind pkg-desc)
      ('dir
       (make-directory pkg-dir t)
       (let ((file-list
              (directory-files
               default-directory 'full "\\`[^.].*\\.el\\'" 'nosort)))
         (dolist (source-file file-list)
           (let ((target-el-file
                  (expand-file-name (file-name-nondirectory source-file) pkg-dir)))
             (copy-file source-file target-el-file t)))
         ;; Now that the files have been installed, this package is
         ;; indistinguishable from a `tar' or a `single'. Let's make
         ;; things simple by ensuring we're one of them.
         (setf (package-desc-kind pkg-desc)
               (if (> (length file-list) 1) 'tar 'single))))
      ('tar
       (make-directory package-user-dir t)
       ;; FIXME: should we delete PKG-DIR if it exists?
       (let* ((default-directory (file-name-as-directory package-user-dir)))
         (package-untar-buffer dirname)))
      ('single
       (let ((el-file (expand-file-name (format "%s.el" name) pkg-dir)))
         (make-directory pkg-dir t)
         (package--write-file-no-coding el-file)))
      (kind (error "Unknown package kind: %S" kind)))
    (package--make-autoloads-and-stuff pkg-desc pkg-dir)
    ;; Update package-alist.
    (let ((new-desc (package-load-descriptor pkg-dir)))
      (unless (equal (package-desc-full-name new-desc)
                     (package-desc-full-name pkg-desc))
        (error "The retrieved package (`%s') doesn't match what the archive offered (`%s')"
               (package-desc-full-name new-desc) (package-desc-full-name pkg-desc)))
      ;; Activation has to be done before compilation, so that if we're
      ;; upgrading and macros have changed we load the new definitions
      ;; before compiling.
      (when (package-activate-1 new-desc :reload :deps)
        ;; FIXME: Compilation should be done as a separate, optional, step.
        ;; E.g. for multi-package installs, we should first install all packages
        ;; and then compile them.
        (package--compile new-desc)
        ;; After compilation, load again any files loaded by
        ;; `activate-1', so that we use the byte-compiled definitions.
        (package--load-files-for-activation new-desc :reload)))
    pkg-dir))

(defun package-generate-description-file (pkg-desc pkg-file)
  "Create the foo-pkg.el file PKG-FILE for single-file package PKG-DESC."
  (let* ((name (package-desc-name pkg-desc)))
    (let ((print-level nil)
          (print-quoted t)
          (print-length nil))
      (write-region
       (concat
        ";;; Generated package description from "
        (replace-regexp-in-string "-pkg\\.el\\'" ".el"
                                  (file-name-nondirectory pkg-file))
        "  -*- no-byte-compile: t -*-\n"
        (prin1-to-string
         (nconc
          (list 'define-package
                (symbol-name name)
                (package-version-join (package-desc-version pkg-desc))
                (package-desc-summary pkg-desc)
                (let ((requires (package-desc-reqs pkg-desc)))
                  (list 'quote
                        ;; Turn version lists into string form.
                        (mapcar
                         (lambda (elt)
                           (list (car elt)
                                 (package-version-join (cadr elt))))
                         requires))))
          (package--alist-to-plist-args
           (package-desc-extras pkg-desc))))
        "\n")
       nil pkg-file nil 'silent))))

;;;; Autoload
(declare-function autoload-rubric "autoload" (file &optional type feature))

(defun package-autoload-ensure-default-file (file)
  "Make sure that the autoload file FILE exists and if not create it."
  (unless (file-exists-p file)
    (require 'autoload)
    (write-region (autoload-rubric file "package" nil) nil file nil 'silent))
  file)

(defvar generated-autoload-file)
(defvar autoload-timestamps)
(defvar version-control)

(defun package-generate-autoloads (name pkg-dir)
  "Generate autoloads in PKG-DIR for package named NAME."
  (let* ((auto-name (format "%s-autoloads.el" name))
         ;;(ignore-name (concat name "-pkg.el"))
         (generated-autoload-file (expand-file-name auto-name pkg-dir))
         ;; We don't need 'em, and this makes the output reproducible.
         (autoload-timestamps nil)
         (backup-inhibited t)
         (version-control 'never))
    (package-autoload-ensure-default-file generated-autoload-file)
    (update-directory-autoloads pkg-dir)
    (let ((buf (find-buffer-visiting generated-autoload-file)))
      (when buf (kill-buffer buf)))
    auto-name))

(defun package--make-autoloads-and-stuff (pkg-desc pkg-dir)
  "Generate autoloads, description file, etc., for PKG-DESC installed at PKG-DIR."
  (package-generate-autoloads (package-desc-name pkg-desc) pkg-dir)
  (let ((desc-file (expand-file-name (package--description-file pkg-dir)
                                     pkg-dir)))
    (unless (file-exists-p desc-file)
      (package-generate-description-file pkg-desc desc-file)))
  ;; FIXME: Create foo.info and dir file from foo.texi?
  )

;;;; Compilation
(defvar warning-minimum-level)
(defun package--compile (pkg-desc)
  "Byte-compile installed package PKG-DESC.
This assumes that `pkg-desc' has already been activated with
`package-activate-1'."
  (let ((warning-minimum-level :error)
        (load-path load-path))
    (byte-recompile-directory (package-desc-dir pkg-desc) 0 t)))

;;;; Inferring package from current buffer
(defun package-read-from-string (str)
  "Read a Lisp expression from STR.
Signal an error if the entire string was not used."
  (pcase-let ((`(,expr . ,offset) (read-from-string str)))
    (condition-case ()
        ;; The call to `ignore' suppresses a compiler warning.
        (progn (ignore (read-from-string str offset))
               (error "Can't read whole string"))
      (end-of-file expr))))

(defun package--prepare-dependencies (deps)
  "Turn DEPS into an acceptable list of dependencies.

Any parts missing a version string get a default version string
of \"0\" (meaning any version) and an appropriate level of lists
is wrapped around any parts requiring it."
  (cond
   ((not (listp deps))
    (error "Invalid requirement specifier: %S" deps))
   (t (mapcar (lambda (dep)
                (cond
                 ((symbolp dep) `(,dep "0"))
                 ((stringp dep)
                  (error "Invalid requirement specifier: %S" dep))
                 ((and (listp dep) (null (cdr dep)))
                  (list (car dep) "0"))
                 (t dep)))
              deps))))

(declare-function lm-header "lisp-mnt" (header))
(declare-function lm-header-multiline "lisp-mnt" (header))
(declare-function lm-homepage "lisp-mnt" (&optional file))
(declare-function lm-keywords-list "lisp-mnt" (&optional file))
(declare-function lm-maintainer "lisp-mnt" (&optional file))
(declare-function lm-authors "lisp-mnt" (&optional file))

(defun package-buffer-info ()
  "Return a `package-desc' describing the package in the current buffer.

If the buffer does not contain a conforming package, signal an
error.  If there is a package, narrow the buffer to the file's
boundaries."
  (goto-char (point-min))
  (unless (re-search-forward "^;;; \\([^ ]*\\)\\.el ---[ \t]*\\(.*?\\)[ \t]*\\(-\\*-.*-\\*-[ \t]*\\)?$" nil t)
    (error "Package lacks a file header"))
  (let ((file-name (match-string-no-properties 1))
        (desc      (match-string-no-properties 2))
        (start     (line-beginning-position)))
    ;; This warning was added in Emacs 27.1, and should be removed at
    ;; the earliest in version 31.1.  The idea is to phase out the
    ;; requirement for a "footer line" without unduly impacting users
    ;; on earlier Emacs versions.  See Bug#26490 for more details.
    (unless (search-forward (concat ";;; " file-name ".el ends here"))
      (lwarn '(package package-format) :warning
             "Package lacks a terminating comment"))
    ;; Try to include a trailing newline.
    (forward-line)
    (narrow-to-region start (point))
    (require 'lisp-mnt)
    ;; Use some headers we've invented to drive the process.
    (let* (;; Prefer Package-Version; if defined, the package author
           ;; probably wants us to use it.  Otherwise try Version.
           (pkg-version
            (or (package-strip-rcs-id (lm-header "package-version"))
                (package-strip-rcs-id (lm-header "version"))))
           (keywords (lm-keywords-list))
           (homepage (lm-homepage)))
      (unless pkg-version
        (error
            "Package lacks a \"Version\" or \"Package-Version\" header"))
      (package-desc-from-define
       file-name pkg-version desc
       (and-let* ((require-lines (lm-header-multiline "package-requires")))
         (package--prepare-dependencies
          (package-read-from-string (mapconcat #'identity require-lines " "))))
       :kind 'single
       :url homepage
       :keywords keywords
       :maintainer (lm-maintainer)
       :authors (lm-authors)))))

(defun package--read-pkg-desc (kind)
  "Read a `define-package' form in current buffer.
Return the pkg-desc, with desc-kind set to KIND."
  (goto-char (point-min))
  (unwind-protect
      (let* ((pkg-def-parsed (read (current-buffer)))
             (pkg-desc
              (when (eq (car pkg-def-parsed) 'define-package)
                (apply #'package-desc-from-define
                  (append (cdr pkg-def-parsed))))))
        (when pkg-desc
          (setf (package-desc-kind pkg-desc) kind)
          pkg-desc))))

(declare-function tar-get-file-descriptor "tar-mode" (file))
(declare-function tar--extract "tar-mode" (descriptor))

(defun package-tar-file-info ()
  "Find package information for a tar file.
The return result is a `package-desc'."
  (cl-assert (derived-mode-p 'tar-mode))
  (let* ((dir-name (file-name-directory
                    (tar-header-name (car tar-parse-info))))
         (desc-file (package--description-file dir-name))
         (tar-desc (tar-get-file-descriptor (concat dir-name desc-file))))
    (unless tar-desc
      (error "No package descriptor file found"))
    (with-current-buffer (tar--extract tar-desc)
      (unwind-protect
          (or (package--read-pkg-desc 'tar)
              (error "Can't find define-package in %s"
                (tar-header-name tar-desc)))
        (kill-buffer (current-buffer))))))

(defun package-dir-info ()
  "Find package information for a directory.
The return result is a `package-desc'."
  (cl-assert (derived-mode-p 'dired-mode))
  (let* ((desc-file (package--description-file default-directory)))
    (if (file-readable-p desc-file)
        (with-temp-buffer
          (insert-file-contents desc-file)
          (package--read-pkg-desc 'dir))
      (let ((files (directory-files default-directory t "\\.el\\'" t))
            info)
        (while files
          (with-temp-buffer
            (insert-file-contents (pop files))
            ;; When we find the file with the data,
            (when (setq info (ignore-errors (package-buffer-info)))
              ;; stop looping,
              (setq files nil)
              ;; set the 'dir kind,
              (setf (package-desc-kind info) 'dir))))
        (unless info
          (error "No .el files with package headers in `%s'" default-directory))
        ;; and return the info.
        info))))

\f
;;; Communicating with Archives
;; Set of low-level functions for communicating with archives and
;; signature checking.

(defun package--write-file-no-coding (file-name)
  "Write file FILE-NAME without encoding using coding system."
  (let ((buffer-file-coding-system 'no-conversion))
    (write-region (point-min) (point-max) file-name nil 'silent)))

(declare-function url-http-file-exists-p "url-http" (url))

(defun package--archive-file-exists-p (location file)
  "Return t if FILE exists in remote LOCATION."
  (let ((http (string-match "\\`https?:" location)))
    (if http
        (progn
          (require 'url-http)
          (url-http-file-exists-p (concat location file)))
      (file-exists-p (expand-file-name file location)))))

(declare-function epg-make-context "epg"
                  (&optional protocol armor textmode include-certs
                             cipher-algorithm
                             digest-algorithm
                             compress-algorithm))
(declare-function epg-verify-string "epg" (context signature
                                                   &optional signed-text))
(declare-function epg-context-result-for "epg" (context name))
(declare-function epg-signature-status "epg" (signature) t)
(declare-function epg-signature-to-string "epg" (signature))

(defun package--display-verify-error (context sig-file)
  "Show error details with CONTEXT for failed verification of SIG-FILE.
The details are shown in a new buffer called \"*Error\"."
  (unless (equal (epg-context-error-output context) "")
    (with-output-to-temp-buffer "*Error*"
      (with-current-buffer standard-output
        (if (epg-context-result-for context 'verify)
            (insert (format "Failed to verify signature %s:\n" sig-file)
                    (mapconcat #'epg-signature-to-string
                               (epg-context-result-for context 'verify)
                               "\n"))
          (insert (format "Error while verifying signature %s:\n" sig-file)))
        (insert "\nCommand output:\n" (epg-context-error-output context))))))

(defmacro package--with-work-buffer (location file &rest body)
  "Run BODY in a buffer containing the contents of FILE at LOCATION.
LOCATION is the base location of a package archive, and should be
one of the URLs (or file names) specified in `package-archives'.
FILE is the name of a file relative to that base location.

This macro retrieves FILE from LOCATION into a temporary buffer,
and evaluates BODY while that buffer is current.  This work
buffer is killed afterwards.  Return the last value in BODY."
  (declare (indent 2) (debug t)
           (obsolete package--with-response-buffer "25.1"))
  `(with-temp-buffer
     (if (string-match-p "\\`https?:" ,location)
         (url-insert-file-contents (concat ,location ,file))
       (unless (file-name-absolute-p ,location)
         (error "Archive location %s is not an absolute file name"
           ,location))
       (insert-file-contents (expand-file-name ,file ,location)))
     ,@body))

(cl-defmacro package--with-response-buffer (url &rest body &key async file error-form noerror &allow-other-keys)
  "Access URL and run BODY in a buffer containing the response.
Point is after the headers when BODY runs.
FILE, if provided, is added to URL.
URL can be a local file name, which must be absolute.
ASYNC, if non-nil, runs the request asynchronously.
ERROR-FORM is run only if a connection error occurs.  If NOERROR
is non-nil, don't propagate connection errors (does not apply to
errors signaled by ERROR-FORM or by BODY).

\(fn URL &key ASYNC FILE ERROR-FORM NOERROR &rest BODY)"
  (declare (indent defun) (debug t))
  (while (keywordp (car body))
    (setq body (cdr (cdr body))))
  `(package--with-response-buffer-1 ,url (lambda () ,@body)
                                    :file ,file
                                    :async ,async
                                    :error-function (lambda () ,error-form)
                                    :noerror ,noerror))

(defmacro package--unless-error (body &rest before-body)
  (declare (debug t) (indent 1))
  (let ((err (make-symbol "err")))
    `(with-temp-buffer
       (set-buffer-multibyte nil)
       (when (condition-case ,err
                 (progn ,@before-body t)
               (error (funcall error-function)
                      (unless noerror
                        (signal (car ,err) (cdr ,err)))))
         (funcall ,body)))))

(cl-defun package--with-response-buffer-1 (url body &key async file error-function noerror &allow-other-keys)
  (if (string-match-p "\\`https?:" url)
        (let ((url (concat url file)))
          (if async
              (package--unless-error #'ignore
                (url-retrieve
                 url
                 (lambda (status)
                   (let ((b (current-buffer)))
                     (require 'url-handlers)
                     (package--unless-error body
                       (when-let* ((er (plist-get status :error)))
                         (error "Error retrieving: %s %S" url er))
                       (with-current-buffer b
                         (goto-char (point-min))
                         (unless (search-forward-regexp "^\r?\n\r?" nil t)
                           (error "Error retrieving: %s %S"
                                  url "incomprehensible buffer")))
                       (url-insert b)
                       (kill-buffer b)
                       (goto-char (point-min)))))
                 nil
                 'silent))
            (package--unless-error body
              ;; Copy&pasted from url-insert-file-contents,
              ;; except it calls `url-insert' because we want the contents
              ;; literally (but there's no url-insert-file-contents-literally).
              (let ((buffer (url-retrieve-synchronously url)))
                (unless buffer (signal 'file-error (list url "No Data")))
                (when (fboundp 'url-http--insert-file-helper)
                  ;; XXX: This is HTTP/S specific and should be moved
                  ;; to url-http instead.  See bug#17549.
                  (url-http--insert-file-helper buffer url))
                (url-insert buffer)
                (kill-buffer buffer)
                (goto-char (point-min))))))
      (package--unless-error body
        (let ((url (expand-file-name file url)))
          (unless (file-name-absolute-p url)
            (error "Location %s is not a url nor an absolute file name"
                   url))
          (insert-file-contents-literally url)))))

(define-error 'bad-signature "Failed to verify signature")

(defun package--check-signature-content (content string &optional sig-file)
  "Check signature CONTENT against STRING.
SIG-FILE is the name of the signature file, used when signaling
errors."
  (let ((context (epg-make-context 'OpenPGP)))
    (when package-gnupghome-dir
      (setf (epg-context-home-directory context) package-gnupghome-dir))
    (condition-case error
        (epg-verify-string context content string)
      (error (package--display-verify-error context sig-file)
             (signal 'bad-signature error)))
    (let (good-signatures had-fatal-error)
      ;; The .sig file may contain multiple signatures.  Success if one
      ;; of the signatures is good.
      (dolist (sig (epg-context-result-for context 'verify))
        (if (eq (epg-signature-status sig) 'good)
            (push sig good-signatures)
          ;; If `package-check-signature' is allow-unsigned, don't
          ;; signal error when we can't verify signature because of
          ;; missing public key.  Other errors are still treated as
          ;; fatal (bug#17625).
          (unless (and (eq (package-check-signature) 'allow-unsigned)
                       (eq (epg-signature-status sig) 'no-pubkey))
            (setq had-fatal-error t))))
      (when (or (null good-signatures)
                (and (eq (package-check-signature) 'all)
                     had-fatal-error))
        (package--display-verify-error context sig-file)
        (signal 'bad-signature (list sig-file)))
      good-signatures)))

(defun package--check-signature (location file &optional string async callback unwind)
  "Check signature of the current buffer.
Download the signature file from LOCATION by appending \".sig\"
to FILE.
GnuPG keyring location depends on `package-gnupghome-dir'.
STRING is the string to verify, it defaults to `buffer-string'.
If ASYNC is non-nil, the download of the signature file is
done asynchronously.

If the signature does not verify, signal an error.
If the signature is verified and CALLBACK was provided, `funcall'
CALLBACK with the list of good signatures as argument (the list
can be empty).
If no signatures file is found, and `package-check-signature' is
`allow-unsigned', call CALLBACK with a nil argument.
Otherwise, an error is signaled.

UNWIND, if provided, is a function to be called after everything
else, even if an error is signaled."
  (let ((sig-file (concat file ".sig"))
        (string (or string (buffer-string))))
    (package--with-response-buffer location :file sig-file
      :async async :noerror t
      ;; Connection error is assumed to mean "no sig-file".
      :error-form (let ((allow-unsigned
                         (eq (package-check-signature) 'allow-unsigned)))
                    (when (and callback allow-unsigned)
                      (funcall callback nil))
                    (when unwind (funcall unwind))
                    (unless allow-unsigned
                      (error "Unsigned file `%s' at %s" file location)))
      ;; OTOH, an error here means "bad signature", which we never
      ;; suppress.  (Bug#22089)
      (unwind-protect
          (let ((sig (package--check-signature-content
                      (buffer-substring (point) (point-max))
                      string sig-file)))
            (when callback (funcall callback sig))
            sig)
        (when unwind (funcall unwind))))))
\f
;;; Packages on Archives
;; The following variables store information about packages available
;; from archives.  The most important of these is
;; `package-archive-contents' which is initially populated by the
;; function `package-read-all-archive-contents' from a cache on disk.
;; The `package-initialize' command is also closely related to this
;; section, but it has its own section.

(defconst package-archive-version 1
  "Version number of the package archive understood by package.el.
Lower version numbers than this will probably be understood as well.")

;; We don't prime the cache since it tends to get out of date.
(defvar package-archive-contents nil
  "Cache of the contents of all archives in `package-archives'.
This is an alist mapping package names (symbols) to
non-empty lists of `package-desc' structures.")
(put 'package-archive-contents 'risky-local-variable t)

(defvar package--compatibility-table nil
  "Hash table connecting package names to their compatibility.
Each key is a symbol, the name of a package.

The value is either nil, representing an incompatible package, or
a version list, representing the highest compatible version of
that package which is available.

A package is considered incompatible if it requires an Emacs
version higher than the one being used.  To check for package
\(in)compatibility, don't read this table directly, use
`package--incompatible-p' which also checks dependencies.")

(defun package--build-compatibility-table ()
  "Build `package--compatibility-table' with `package--mapc'."
  ;; Initialize the list of built-ins.
  (require 'finder-inf nil t)
  ;; Build compat table.
  (setq package--compatibility-table (make-hash-table :test 'eq))
  (package--mapc #'package--add-to-compatibility-table))

(defun package--add-to-compatibility-table (pkg)
  "If PKG is compatible (without dependencies), add to the compatibility table.
PKG is a package-desc object.
Only adds if its version is higher than what's already stored in
the table."
  (unless (package--incompatible-p pkg 'shallow)
    (let* ((name (package-desc-name pkg))
           (version (or (package-desc-version pkg) '(0)))
           (table-version (gethash name package--compatibility-table)))
      (when (or (not table-version)
                (version-list-< table-version version))
        (puthash name version package--compatibility-table)))))

;; Package descriptor objects used inside the "archive-contents" file.
;; Changing this defstruct implies changing the format of the
;; "archive-contents" files.
(cl-defstruct (package--ac-desc
               (:constructor package-make-ac-desc (version reqs summary kind extras))
               (:copier nil)
               (:type vector))
  version reqs summary kind extras)

(defun package--append-to-alist (pkg-desc alist)
  "Append an entry for PKG-DESC to the start of ALIST and return it.
This entry takes the form (`package-desc-name' PKG-DESC).

If ALIST already has an entry with this name, destructively add
PKG-DESC to the cdr of this entry instead, sorted by version
number."
  (let* ((name (package-desc-name pkg-desc))
         (priority-version (package-desc-priority-version pkg-desc))
         (existing-packages (assq name alist)))
    (if (not existing-packages)
        (cons (list name pkg-desc)
              alist)
      (while (if (and (cdr existing-packages)
                      (version-list-< priority-version
                                      (package-desc-priority-version
                                       (cadr existing-packages))))
                 (setq existing-packages (cdr existing-packages))
               (push pkg-desc (cdr existing-packages))
               nil))
      alist)))

(defun package--add-to-archive-contents (package archive)
  "Add the PACKAGE from the given ARCHIVE if necessary.
PACKAGE should have the form (NAME . PACKAGE--AC-DESC).
Also, add the originating archive to the `package-desc' structure."
  (let* ((name (car package))
         (version (package--ac-desc-version (cdr package)))
         (pkg-desc
          (package-desc-create
           :name name
           :version version
           :reqs (package--ac-desc-reqs (cdr package))
           :summary (package--ac-desc-summary (cdr package))
           :kind (package--ac-desc-kind (cdr package))
           :archive archive
           :extras (and (> (length (cdr package)) 4)
                        ;; Older archive-contents files have only 4
                        ;; elements here.
                        (package--ac-desc-extras (cdr package)))))
         (pinned-to-archive (assoc name package-pinned-packages)))
    ;; Skip entirely if pinned to another archive.
    (when (not (and pinned-to-archive
                    (not (equal (cdr pinned-to-archive) archive))))
      (setq package-archive-contents
            (package--append-to-alist pkg-desc package-archive-contents)))))

(defun package--read-archive-file (file)
  "Read cached archive FILE data, if it exists.
Return the data from the file, or nil if the file does not exist.
If the archive version is too new, signal an error."
  (let ((filename (expand-file-name file package-user-dir)))
    (when (file-exists-p filename)
      (with-temp-buffer
        (let ((coding-system-for-read 'utf-8))
          (insert-file-contents filename))
        (let ((contents (read (current-buffer))))
          (if (> (car contents) package-archive-version)
              (error "Package archive version %d is higher than %d"
                (car contents) package-archive-version))
          (cdr contents))))))

(defun package-read-archive-contents (archive)
  "Read cached archive file for ARCHIVE.
If successful, set or update the variable `package-archive-contents'.
ARCHIVE should be a string matching the name of a package archive
in the variable `package-archives'.
If the archive version is too new, signal an error."
  ;; Version 1 of 'archive-contents' is identical to our internal
  ;; representation.
  (let* ((contents-file (format "archives/%s/archive-contents" archive))
         (contents (package--read-archive-file contents-file)))
    (when contents
      (dolist (package contents)
        (if package
            (package--add-to-archive-contents package archive)
          (lwarn '(package refresh) :warning
                 "Ignoring `nil' package on `%s' package archive" archive))))))

(defvar package--old-archive-priorities nil
  "Store currently used `package-archive-priorities'.
This is the value of `package-archive-priorities' last time
`package-read-all-archive-contents' was called.  It can be used
by arbitrary functions to decide whether it is necessary to call
it again.")

(defun package-read-all-archive-contents ()
  "Read cached archive file for all archives in `package-archives'.
If successful, set or update `package-archive-contents'."
  (setq package-archive-contents nil)
  (setq package--old-archive-priorities package-archive-priorities)
  (dolist (archive package-archives)
    (package-read-archive-contents (car archive))))

\f
;;;; Package Initialize
;; A bit of a milestone.  This brings together some of the above
;; sections and populates all relevant lists of packages from contents
;; available on disk.

(defvar package--initialized nil
  "Non-nil if `package-initialize' has been run.")

;;;###autoload
(defvar package--activated nil
  "Non-nil if `package-activate-all' has been run.")

;;;###autoload
(defun package-initialize (&optional no-activate)
  "Load Emacs Lisp packages, and activate them.
The variable `package-load-list' controls which packages to load.
If optional arg NO-ACTIVATE is non-nil, don't activate packages.

It is not necessary to adjust `load-path' or `require' the
individual packages after calling `package-initialize' -- this is
taken care of by `package-initialize'.

If `package-initialize' is called twice during Emacs startup,
signal a warning, since this is a bad idea except in highly
advanced use cases.  To suppress the warning, remove the
superfluous call to `package-initialize' from your init-file.  If
you have code which must run before `package-initialize', put
that code in the early init-file."
  (interactive)
  (when (and package--initialized (not after-init-time))
    (lwarn '(package reinitialization) :warning
           "Unnecessary call to `package-initialize' in init file"))
  (setq package-alist nil)
  (package-load-all-descriptors)
  (package-read-all-archive-contents)
  (setq package--initialized t)
  (unless no-activate
    (package-activate-all))
  ;; This uses `package--mapc' so it must be called after
  ;; `package--initialized' is t.
  (package--build-compatibility-table))

(defvar package-quickstart-file)

;;;###autoload
(defun package-activate-all ()
  "Activate all installed packages.
The variable `package-load-list' controls which packages to load."
  (setq package--activated t)
  (if (file-readable-p package-quickstart-file)
      ;; Skip load-source-file-function which would slow us down by a factor
      ;; 2 (this assumes we were careful to save this file so it doesn't need
      ;; any decoding).
      (let ((load-source-file-function nil))
        (load package-quickstart-file nil 'nomessage))
    (dolist (elt (package--alist))
      (condition-case err
          (package-activate (car elt))
        ;; Don't let failure of activation of a package arbitrarily stop
        ;; activation of further packages.
        (error (message "%s" (error-message-string err)))))))
\f
;;;; Populating `package-archive-contents' from archives
;; This subsection populates the variables listed above from the
;; actual archives, instead of from a local cache.

(defvar package--downloads-in-progress nil
  "List of in-progress asynchronous downloads.")

(declare-function epg-import-keys-from-file "epg" (context keys))

;;;###autoload
(defun package-import-keyring (&optional file)
  "Import keys from FILE."
  (interactive "fFile: ")
  (setq file (expand-file-name file))
  (let ((context (epg-make-context 'OpenPGP)))
    (when package-gnupghome-dir
      (with-file-modes 448
        (make-directory package-gnupghome-dir t))
      (setf (epg-context-home-directory context) package-gnupghome-dir))
    (message "Importing %s..." (file-name-nondirectory file))
    (epg-import-keys-from-file context file)
    (message "Importing %s...done" (file-name-nondirectory file))))

(defvar package--post-download-archives-hook nil
  "Hook run after the archive contents are downloaded.
Don't run this hook directly.  It is meant to be run as part of
`package--update-downloads-in-progress'.")
(put 'package--post-download-archives-hook 'risky-local-variable t)

(defun package--update-downloads-in-progress (entry)
  "Remove ENTRY from `package--downloads-in-progress'.
Once it's empty, run `package--post-download-archives-hook'."
  ;; Keep track of the downloading progress.
  (setq package--downloads-in-progress
        (remove entry package--downloads-in-progress))
  ;; If this was the last download, run the hook.
  (unless package--downloads-in-progress
    (package-read-all-archive-contents)
    (package--build-compatibility-table)
    ;; We message before running the hook, so the hook can give
    ;; messages as well.
    (message "Package refresh done")
    (run-hooks 'package--post-download-archives-hook)))

(defun package--download-one-archive (archive file &optional async)
  "Retrieve an archive file FILE from ARCHIVE, and cache it.
ARCHIVE should be a cons cell of the form (NAME . LOCATION),
similar to an entry in `package-alist'.  Save the cached copy to
\"archives/NAME/FILE\" in `package-user-dir'."
  (package--with-response-buffer (cdr archive) :file file
    :async async
    :error-form (package--update-downloads-in-progress archive)
    (let* ((location (cdr archive))
           (name (car archive))
           (content (buffer-string))
           (dir (expand-file-name (concat "archives/" name) package-user-dir))
           (local-file (expand-file-name file dir)))
      (when (listp (read content))
        (make-directory dir t)
        (if (or (not (package-check-signature))
                (member name package-unsigned-archives))
            ;; If we don't care about the signature, save the file and
            ;; we're done.
            (progn
             (cl-assert (not enable-multibyte-characters))
             (let ((coding-system-for-write 'binary))
               (write-region content nil local-file nil 'silent))
             (package--update-downloads-in-progress archive))
          ;; If we care, check it (perhaps async) and *then* write the file.
          (package--check-signature
           location file content async
           ;; This function will be called after signature checking.
           (lambda (&optional good-sigs)
             (cl-assert (not enable-multibyte-characters))
             (let ((coding-system-for-write 'binary))
               (write-region content nil local-file nil 'silent))
             ;; Write out good signatures into archive-contents.signed file.
             (when good-sigs
               (write-region (mapconcat #'epg-signature-to-string good-sigs "\n")
                             nil (concat local-file ".signed") nil 'silent)))
           (lambda () (package--update-downloads-in-progress archive))))))))

(defun package--download-and-read-archives (&optional async)
  "Download descriptions of all `package-archives' and read them.
Populate `package-archive-contents' with the result.

If optional argument ASYNC is non-nil, perform the downloads
asynchronously."
  ;; The downloaded archive contents will be read as part of
  ;; `package--update-downloads-in-progress'.
  (dolist (archive package-archives)
    (cl-pushnew archive package--downloads-in-progress
                :test #'equal))
  (dolist (archive package-archives)
    (condition-case-unless-debug nil
        (package--download-one-archive archive "archive-contents" async)
      (error (message "Failed to download `%s' archive."
               (car archive))))))

;;;###autoload
(defun package-refresh-contents (&optional async)
  "Download descriptions of all configured ELPA packages.
For each archive configured in the variable `package-archives',
inform Emacs about the latest versions of all packages it offers,
and make them available for download.
Optional argument ASYNC specifies whether to perform the
downloads in the background."
  (interactive)
  (unless (file-exists-p package-user-dir)
    (make-directory package-user-dir t))
  (let ((default-keyring (expand-file-name "package-keyring.gpg"
                                           data-directory))
        (inhibit-message (or inhibit-message async)))
    (when (and (package-check-signature) (file-exists-p default-keyring))
      (condition-case-unless-debug error
          (package-import-keyring default-keyring)
        (error (message "Cannot import default keyring: %S" (cdr error))))))
  (package--download-and-read-archives async))

\f
;;; Dependency Management
;; Calculating the full transaction necessary for an installation,
;; keeping track of which packages were installed strictly as
;; dependencies, and determining which packages cannot be removed
;; because they are dependencies.

(defun package-compute-transaction (packages requirements &optional seen)
  "Return a list of packages to be installed, including PACKAGES.
PACKAGES should be a list of `package-desc'.

REQUIREMENTS should be a list of additional requirements; each
element in this list should have the form (PACKAGE VERSION-LIST),
where PACKAGE is a package name and VERSION-LIST is the required
version of that package.

This function recursively computes the requirements of the
packages in REQUIREMENTS, and returns a list of all the packages
that must be installed.  Packages that are already installed are
not included in this list.

SEEN is used internally to detect infinite recursion."
  ;; FIXME: We really should use backtracking to explore the whole
  ;; search space (e.g. if foo require bar-1.3, and bar-1.4 requires toto-1.1
  ;; whereas bar-1.3 requires toto-1.0 and the user has put a hold on toto-1.0:
  ;; the current code might fail to see that it could install foo by using the
  ;; older bar-1.3).
  (dolist (elt requirements)
    (let* ((next-pkg (car elt))
           (next-version (cadr elt))
           (already ()))
      (dolist (pkg packages)
        (if (eq next-pkg (package-desc-name pkg))
            (setq already pkg)))
      (when already
        (if (version-list-<= next-version (package-desc-version already))
            ;; `next-pkg' is already in `packages', but its position there
            ;; means it might be installed too late: remove it from there, so
            ;; we re-add it (along with its dependencies) at an earlier place
            ;; below (bug#16994).
            (if (memq already seen)     ;Avoid inf-loop on dependency cycles.
                (message "Dependency cycle going through %S"
                         (package-desc-full-name already))
              (setq packages (delq already packages))
              (setq already nil))
          (error "Need package `%s-%s', but only %s is being installed"
                 next-pkg (package-version-join next-version)
                 (package-version-join (package-desc-version already)))))
      (cond
       (already nil)
       ((package-installed-p next-pkg next-version) nil)

       (t
        ;; A package is required, but not installed.  It might also be
        ;; blocked via `package-load-list'.
        (let ((pkg-descs (cdr (assq next-pkg package-archive-contents)))
              (found nil)
              (found-something nil)
              (problem nil))
          (while (and pkg-descs (not found))
            (let* ((pkg-desc (pop pkg-descs))
                   (version (package-desc-version pkg-desc))
                   (disabled (package-disabled-p next-pkg version)))
              (cond
               ((version-list-< version next-version)
                ;; pkg-descs is sorted by priority, not version, so
                ;; don't error just yet.
                (unless found-something
                  (setq found-something (package-version-join version))))
               (disabled
                (unless problem
                  (setq problem
                        (if (stringp disabled)
                            (format-message
                             "Package `%s' held at version %s, but version %s required"
                             next-pkg disabled
                             (package-version-join next-version))
                          (format-message "Required package `%s' is disabled"
                                          next-pkg)))))
               (t (setq found pkg-desc)))))
          (unless found
            (cond
             (problem (error "%s" problem))
             (found-something
              (error "Need package `%s-%s', but only %s is available"
                     next-pkg (package-version-join next-version)
                     found-something))
             (t (error "Package `%s-%s' is unavailable"
                       next-pkg (package-version-join next-version)))))
          (setq packages
                (package-compute-transaction (cons found packages)
                                             (package-desc-reqs found)
                                             (cons found seen))))))))
  packages)

(defun package--find-non-dependencies ()
  "Return a list of installed packages which are not dependencies.
Finds all packages in `package-alist' which are not dependencies
of any other packages.
Used to populate `package-selected-packages'."
  (let ((dep-list
         (delete-dups
          (apply #'append
            (mapcar (lambda (p) (mapcar #'car (package-desc-reqs (cadr p))))
                    package-alist)))))
    (cl-loop for p in package-alist
             for name = (car p)
             unless (memq name dep-list)
             collect name)))

(defun package--save-selected-packages (&optional value)
  "Set and save `package-selected-packages' to VALUE."
  (when value
    (setq package-selected-packages value))
  (if after-init-time
      (customize-save-variable 'package-selected-packages package-selected-packages)
    (add-hook 'after-init-hook #'package--save-selected-packages)))

(defun package--user-selected-p (pkg)
  "Return non-nil if PKG is a package was installed by the user.
PKG is a package name.
This looks into `package-selected-packages', populating it first
if it is still empty."
  (unless (consp package-selected-packages)
    (package--save-selected-packages (package--find-non-dependencies)))
  (memq pkg package-selected-packages))

(defun package--get-deps (pkgs)
  (let ((seen '()))
    (while pkgs
      (let ((pkg (pop pkgs)))
        (if (memq pkg seen)
            nil ;; Done already!
          (let ((pkg-desc (cadr (assq pkg package-alist))))
            (when pkg-desc
              (push pkg seen)
              (setq pkgs (append (mapcar #'car (package-desc-reqs pkg-desc))
                                 pkgs)))))))
    seen))

(defun package--user-installed-p (package)
  "Return non-nil if PACKAGE is a user-installed package.
PACKAGE is the package name, a symbol.  Check whether the package
was installed into `package-user-dir' where we assume to have
control over."
  (let* ((pkg-desc (cadr (assq package package-alist)))
         (dir (package-desc-dir pkg-desc)))
    (file-in-directory-p dir package-user-dir)))

(defun package--removable-packages ()
  "Return a list of names of packages no longer needed.
These are packages which are neither contained in
`package-selected-packages' nor a dependency of one that is."
  (let ((needed (package--get-deps package-selected-packages)))
    (cl-loop for p in (mapcar #'car package-alist)
             unless (or (memq p needed)
                        ;; Do not auto-remove external packages.
                        (not (package--user-installed-p p)))
             collect p)))

(defun package--used-elsewhere-p (pkg-desc &optional pkg-list all)
  "Non-nil if PKG-DESC is a dependency of a package in PKG-LIST.
Return the first package found in PKG-LIST of which PKG is a
dependency.  If ALL is non-nil, return all such packages instead.

When not specified, PKG-LIST defaults to `package-alist'
with PKG-DESC entry removed."
  (unless (string= (package-desc-status pkg-desc) "obsolete")
    (let* ((pkg (package-desc-name pkg-desc))
           (alist (or pkg-list
                      (remove (assq pkg package-alist)
                              package-alist))))
      (if all
          (cl-loop for p in alist
                   if (assq pkg (package-desc-reqs (cadr p)))
                   collect (cadr p))
        (cl-loop for p in alist thereis
                 (and (assq pkg (package-desc-reqs (cadr p)))
                      (cadr p)))))))

(defun package--sort-deps-in-alist (package only)
  "Return a list of dependencies for PACKAGE sorted by dependency.
PACKAGE is included as the first element of the returned list.
ONLY is an alist associating package names to package objects.
Only these packages will be in the return value and their cdrs are
destructively set to nil in ONLY."
  (let ((out))
    (dolist (dep (package-desc-reqs package))
      (when-let* ((cell (assq (car dep) only))
                  (dep-package (cdr-safe cell)))
        (setcdr cell nil)
        (setq out (append (package--sort-deps-in-alist dep-package only)
                          out))))
    (cons package out)))

(defun package--sort-by-dependence (package-list)
  "Return PACKAGE-LIST sorted by dependence.
That is, any element of the returned list is guaranteed to not
directly depend on any elements that come before it.

PACKAGE-LIST is a list of `package-desc' objects.
Indirect dependencies are guaranteed to be returned in order only
if all the in-between dependencies are also in PACKAGE-LIST."
  (let ((alist (mapcar (lambda (p) (cons (package-desc-name p) p)) package-list))
        out-list)
    (dolist (cell alist out-list)
      ;; `package--sort-deps-in-alist' destructively changes alist, so
      ;; some cells might already be empty.  We check this here.
      (when-let* ((pkg-desc (cdr cell)))
        (setcdr cell nil)
        (setq out-list
              (append (package--sort-deps-in-alist pkg-desc alist)
                      out-list))))))

\f
;;; Installation Functions
;; As opposed to the previous section (which listed some underlying
;; functions necessary for installation), this one contains the actual
;; functions that install packages.  The package itself can be
;; installed in a variety of ways (archives, buffer, file), but
;; requirements (dependencies) are always satisfied by looking in
;; `package-archive-contents'.

(defun package-archive-base (desc)
  "Return the package described by DESC."
  (cdr (assoc (package-desc-archive desc) package-archives)))

(defun package-install-from-archive (pkg-desc)
  "Download and install a tar package defined by PKG-DESC."
  ;; This won't happen, unless the archive is doing something wrong.
  (when (eq (package-desc-kind pkg-desc) 'dir)
    (error "Can't install directory package from archive"))
  (let* ((location (package-archive-base pkg-desc))
         (file (concat (package-desc-full-name pkg-desc)
                       (package-desc-suffix pkg-desc))))
    (package--with-response-buffer location :file file
      (if (or (not (package-check-signature))
              (member (package-desc-archive pkg-desc)
                      package-unsigned-archives))
          ;; If we don't care about the signature, unpack and we're
          ;; done.
          (let ((save-silently t))
            (package-unpack pkg-desc))
        ;; If we care, check it and *then* write the file.
        (let ((content (buffer-string)))
          (package--check-signature
           location file content nil
           ;; This function will be called after signature checking.
           (lambda (&optional good-sigs)
             ;; Signature checked, unpack now.
             (with-temp-buffer ;FIXME: Just use the previous current-buffer.
               (set-buffer-multibyte nil)
               (cl-assert (not (multibyte-string-p content)))
               (insert content)
               (let ((save-silently t))
                 (package-unpack pkg-desc)))
             ;; Here the package has been installed successfully, mark it as
             ;; signed if appropriate.
             (when good-sigs
               ;; Write out good signatures into NAME-VERSION.signed file.
               (write-region (mapconcat #'epg-signature-to-string good-sigs "\n")
                             nil
                             (expand-file-name
                              (concat (package-desc-full-name pkg-desc) ".signed")
                              package-user-dir)
                             nil 'silent)
               ;; Update the old pkg-desc which will be shown on the description buffer.
               (setf (package-desc-signed pkg-desc) t)
               ;; Update the new (activated) pkg-desc as well.
               (when-let* ((pkg-descs (cdr (assq (package-desc-name pkg-desc)
                                                 package-alist))))
                 (setf (package-desc-signed (car pkg-descs)) t))))))))))

(defun package-installed-p (package &optional min-version)
  "Return non-nil if PACKAGE, of MIN-VERSION or newer, is installed.
If PACKAGE is a symbol, it is the package name and MIN-VERSION
should be a version list.

If PACKAGE is a `package-desc' object, MIN-VERSION is ignored."
  (cond
   ((package-desc-p package)
    (let ((dir (package-desc-dir package)))
        (and (stringp dir)
             (file-exists-p dir))))
   ((and (not package--initialized)
         (null min-version)
         package-activated-list)
    ;; We used the quickstart: make it possible to use package-installed-p
    ;; even before package is fully initialized.
    (memq package package-activated-list))
   (t
    (or
     (let ((pkg-descs (cdr (assq package (package--alist)))))
       (and pkg-descs
            (version-list-<= min-version
                             (package-desc-version (car pkg-descs)))))
     ;; Also check built-in packages.
     (package-built-in-p package min-version)))))

(defun package-download-transaction (packages)
  "Download and install all the packages in PACKAGES.
PACKAGES should be a list of `package-desc'.
This function assumes that all package requirements in
PACKAGES are satisfied, i.e. that PACKAGES is computed
using `package-compute-transaction'."
  (mapc #'package-install-from-archive packages))

;;;###autoload
(defun package-install (pkg &optional dont-select)
  "Install the package PKG.
PKG can be a `package-desc' or a symbol naming one of the
available packages in an archive in `package-archives'.  When
called interactively, prompt for the package name.

Mark the installed package as selected by adding it to
`package-selected-packages'.

When called from Lisp and optional argument DONT-SELECT is
non-nil, install the package but do not add it to
`package-selected-packages'.

If PKG is a `package-desc' and it is already installed, don't try
to install it but still mark it as selected."
  (interactive
   (progn
     ;; Initialize the package system to get the list of package
     ;; symbols for completion.
     (unless package--initialized
       (package-initialize t))
     (unless package-archive-contents
       (package-refresh-contents))
     (list (intern (completing-read
                    "Install package: "
                    (delq nil
                          (mapcar (lambda (elt)
                                    (unless (package-installed-p (car elt))
                                      (symbol-name (car elt))))
                                  package-archive-contents))
                    nil t))
           nil)))
  (add-hook 'post-command-hook #'package-menu--post-refresh)
  (let ((name (if (package-desc-p pkg)
                  (package-desc-name pkg)
                pkg)))
    (unless (or dont-select (package--user-selected-p name))
      (package--save-selected-packages
       (cons name package-selected-packages)))
    (if-let* ((transaction
               (if (package-desc-p pkg)
                   (unless (package-installed-p pkg)
                     (package-compute-transaction (list pkg)
                                                  (package-desc-reqs pkg)))
                 (package-compute-transaction () (list (list pkg))))))
        (progn
          (package-download-transaction transaction)
          (package--quickstart-maybe-refresh))
      (message "`%s' is already installed" name))))

(defun package-strip-rcs-id (str)
  "Strip RCS version ID from the version string STR.
If the result looks like a dotted numeric version, return it.
Otherwise return nil."
  (when str
    (when (string-match "\\`[ \t]*[$]Revision:[ \t]+" str)
      (setq str (substring str (match-end 0))))
    (ignore-errors
      (if (version-to-list str) str))))

(declare-function lm-homepage "lisp-mnt" (&optional file))

;;;###autoload
(defun package-install-from-buffer ()
  "Install a package from the current buffer.
The current buffer is assumed to be a single .el or .tar file or
a directory.  These must follow the packaging guidelines (see
info node `(elisp)Packaging').

Specially, if current buffer is a directory, the -pkg.el
description file is not mandatory, in which case the information
is derived from the main .el file in the directory.

Downloads and installs required packages as needed."
  (interactive)
  (let* ((pkg-desc
          (cond
            ((derived-mode-p 'dired-mode)
             ;; This is the only way a package-desc object with a `dir'
             ;; desc-kind can be created.  Such packages can't be
             ;; uploaded or installed from archives, they can only be
             ;; installed from local buffers or directories.
             (package-dir-info))
            ((derived-mode-p 'tar-mode)
             (package-tar-file-info))
            (t
             (save-excursion
              (package-buffer-info)))))
         (name (package-desc-name pkg-desc)))
    ;; Download and install the dependencies.
    (let* ((requires (package-desc-reqs pkg-desc))
           (transaction (package-compute-transaction nil requires)))
      (package-download-transaction transaction))
    ;; Install the package itself.
    (package-unpack pkg-desc)
    (unless (package--user-selected-p name)
      (package--save-selected-packages
       (cons name package-selected-packages)))
    pkg-desc))

;;;###autoload
(defun package-install-file (file)
  "Install a package from FILE.
The file can either be a tar file, an Emacs Lisp file, or a
directory."
  (interactive "fPackage file name: ")
  (with-temp-buffer
    (if (file-directory-p file)
        (progn
          (setq default-directory file)
          (dired-mode))
      (if (string-match "\\.el\\'" file)
          (insert-file-contents file)
        (insert-file-contents-literally file))
      (when (string-match "\\.tar\\'" file) (tar-mode)))
    (package-install-from-buffer)))

;;;###autoload
(defun package-install-selected-packages ()
  "Ensure packages in `package-selected-packages' are installed.
If some packages are not installed propose to install them."
  (interactive)
  ;; We don't need to populate `package-selected-packages' before
  ;; using here, because the outcome is the same either way (nothing
  ;; gets installed).
  (if (not package-selected-packages)
      (message "`package-selected-packages' is empty, nothing to install")
    (let* ((not-installed (seq-remove #'package-installed-p package-selected-packages))
           (available (seq-filter (lambda (p) (assq p package-archive-contents)) not-installed))
           (difference (- (length not-installed) (length available))))
      (cond
       (available
        (when (y-or-n-p
               (format "Packages to install: %d (%s), proceed? "
                       (length available)
                       (mapconcat #'symbol-name available " ")))
          (mapc (lambda (p) (package-install p 'dont-select)) available)))
       ((> difference 0)
        (message "Packages that are not available: %d (the rest is already installed), maybe you need to `M-x package-refresh-contents'"
                 difference))
       (t
        (message "All your packages are already installed"))))))

\f
;;; Package Deletion

(defun package--newest-p (pkg)
  "Return non-nil if PKG is the newest package with its name."
  (equal (cadr (assq (package-desc-name pkg) package-alist))
         pkg))

(defun package-delete (pkg-desc &optional force nosave)
  "Delete package PKG-DESC.

Argument PKG-DESC is a full description of package as vector.
Interactively, prompt the user for the package name and version.

When package is used elsewhere as dependency of another package,
refuse deleting it and return an error.
If prefix argument FORCE is non-nil, package will be deleted even
if it is used elsewhere.
If NOSAVE is non-nil, the package is not removed from
`package-selected-packages'."
  (interactive
   (progn
     (let* ((package-table
             (mapcar
              (lambda (p) (cons (package-desc-full-name p) p))
              (delq nil
                    (mapcar (lambda (p) (unless (package-built-in-p p) p))
                            (apply #'append (mapcar #'cdr (package--alist)))))))
            (package-name (completing-read "Delete package: "
                                           (mapcar #'car package-table)
                                           nil t)))
       (list (cdr (assoc package-name package-table))
             current-prefix-arg nil))))
  (let ((dir (package-desc-dir pkg-desc))
        (name (package-desc-name pkg-desc))
        pkg-used-elsewhere-by)
    ;; If the user is trying to delete this package, they definitely
    ;; don't want it marked as selected, so we remove it from
    ;; `package-selected-packages' even if it can't be deleted.
    (when (and (null nosave)
               (package--user-selected-p name)
               ;; Don't deselect if this is an older version of an
               ;; upgraded package.
               (package--newest-p pkg-desc))
      (package--save-selected-packages (remove name package-selected-packages)))
    (cond ((not (string-prefix-p (file-name-as-directory
                                  (expand-file-name package-user-dir))
                                 (expand-file-name dir)))
           ;; Don't delete "system" packages.
           (error "Package `%s' is a system package, not deleting"
                  (package-desc-full-name pkg-desc)))
          ((and (null force)
                (setq pkg-used-elsewhere-by
                      (package--used-elsewhere-p pkg-desc)))
           ;; Don't delete packages used as dependency elsewhere.
           (error "Package `%s' is used by `%s' as dependency, not deleting"
                  (package-desc-full-name pkg-desc)
                  (package-desc-name pkg-used-elsewhere-by)))
          (t
           (add-hook 'post-command-hook #'package-menu--post-refresh)
           (delete-directory dir t)
           ;; Remove NAME-VERSION.signed and NAME-readme.txt files.
           ;;
           ;; NAME-readme.txt files are no longer created, but they
           ;; may be left around from an earlier install.
           (dolist (suffix '(".signed" "readme.txt"))
             (let* ((version (package-version-join (package-desc-version pkg-desc)))
                    (file (concat (if (string= suffix ".signed")
                                      dir
                                    (substring dir 0 (- (length version))))
                                  suffix)))
               (when (file-exists-p file)
                 (delete-file file))))
           ;; Update package-alist.
           (let ((pkgs (assq name package-alist)))
             (delete pkg-desc pkgs)
             (unless (cdr pkgs)
               (setq package-alist (delq pkgs package-alist))))
           (package--quickstart-maybe-refresh)
           (message "Package `%s' deleted."
                    (package-desc-full-name pkg-desc))))))

;;;###autoload
(defun package-reinstall (pkg)
  "Reinstall package PKG.
PKG should be either a symbol, the package name, or a `package-desc'
object."
  (interactive (list (intern (completing-read
                              "Reinstall package: "
                              (mapcar #'symbol-name
                                      (mapcar #'car package-alist))))))
  (package-delete
   (if (package-desc-p pkg) pkg (cadr (assq pkg package-alist)))
   'force 'nosave)
  (package-install pkg 'dont-select))

;;;###autoload
(defun package-autoremove ()
  "Remove packages that are no longer needed.

Packages that are no more needed by other packages in
`package-selected-packages' and their dependencies
will be deleted."
  (interactive)
  ;; If `package-selected-packages' is nil, it would make no sense to
  ;; try to populate it here, because then `package-autoremove' will
  ;; do absolutely nothing.
  (when (or package-selected-packages
            (yes-or-no-p
             (format-message
              "`package-selected-packages' is empty! Really remove ALL packages? ")))
    (let ((removable (package--removable-packages)))
      (if removable
          (when (y-or-n-p
                 (format "Packages to delete: %d (%s), proceed? "
                   (length removable)
                   (mapconcat #'symbol-name removable " ")))
            (mapc (lambda (p)
                    (package-delete (cadr (assq p package-alist)) t))
                  removable))
        (message "Nothing to autoremove")))))

\f
;;;; Package description buffer.

;;;###autoload
(defun describe-package (package)
  "Display the full documentation of PACKAGE (a symbol)."
  (interactive
   (let* ((guess (or (function-called-at-point)
                     (symbol-at-point))))
     (require 'finder-inf nil t)
     ;; Load the package list if necessary (but don't activate them).
     (unless package--initialized
       (package-initialize t))
     (let ((packages (append (mapcar #'car package-alist)
                             (mapcar #'car package-archive-contents)
                             (mapcar #'car package--builtins))))
       (unless (memq guess packages)
         (setq guess nil))
       (setq packages (mapcar #'symbol-name packages))
       (let ((val
              (completing-read (if guess
                                   (format "Describe package (default %s): "
                                           guess)
                                 "Describe package: ")
                               packages nil t nil nil (when guess
                                                        (symbol-name guess)))))
         (list (and (> (length val) 0) (intern val)))))))
  (if (not (or (package-desc-p package) (and package (symbolp package))))
      (message "No package specified")
    (help-setup-xref (list #'describe-package package)
                     (called-interactively-p 'interactive))
    (with-help-window (help-buffer)
      (with-current-buffer standard-output
        (describe-package-1 package)))))

(defface package-help-section-name
  '((t :inherit (bold font-lock-function-name-face)))
  "Face used on section names in package description buffers."
  :version "25.1")

(defun package--print-help-section (name &rest strings)
  "Print \"NAME: \", right aligned to the 13th column.
If more STRINGS are provided, insert them followed by a newline.
Otherwise no newline is inserted."
  (declare (indent 1))
  (insert (make-string (max 0 (- 11 (string-width name))) ?\s)
          (propertize (concat name ": ") 'font-lock-face 'package-help-section-name))
  (when strings
    (apply #'insert strings)
    (insert "\n")))

(declare-function lm-commentary "lisp-mnt" (&optional file))

(defun package--get-description (desc)
  "Return a string containing the long description of the package DESC.
The description is read from the installed package files."
  ;; Installed packages have nil for kind, so we look for README
  ;; first, then fall back to the Commentary header.

  ;; We don’t include README.md here, because that is often the home
  ;; page on a site like github, and not suitable as the package long
  ;; description.
  (let ((files '("README-elpa" "README-elpa.md" "README" "README.rst" "README.org"))
        file
        (srcdir (package-desc-dir desc))
        result)
    (while (and files
                (not result))
      (setq file (pop files))
      (when (file-readable-p (expand-file-name file srcdir))
        ;; Found a README.
        (with-temp-buffer
          (insert-file-contents (expand-file-name file srcdir))
          (setq result (buffer-string)))))

    (or
     result

     ;; Look for Commentary header.
     (let ((mainsrcfile (expand-file-name (format "%s.el" (package-desc-name desc))
                                          srcdir)))
       (when (file-readable-p mainsrcfile)
         (with-temp-buffer
           (insert (or (lm-commentary mainsrcfile) ""))
           (goto-char (point-min))
           (when (re-search-forward "^;;; Commentary:\n" nil t)
             (replace-match ""))
           (while (re-search-forward "^\\(;+ ?\\)" nil t)
             (replace-match ""))
           (buffer-string))))
     )))

(defun describe-package-1 (pkg)
  "Insert the package description for PKG.
Helper function for `describe-package'."
  (require 'lisp-mnt)
  (let* ((desc (or
                (if (package-desc-p pkg) pkg)
                (cadr (assq pkg package-alist))
                (let ((built-in (assq pkg package--builtins)))
                  (if built-in
                      (package--from-builtin built-in)
                    (cadr (assq pkg package-archive-contents))))))
         (name (if desc (package-desc-name desc) pkg))
         (pkg-dir (if desc (package-desc-dir desc)))
         (reqs (if desc (package-desc-reqs desc)))
         (required-by (if desc (package--used-elsewhere-p desc nil 'all)))
         (version (if desc (package-desc-version desc)))
         (archive (if desc (package-desc-archive desc)))
         (extras (and desc (package-desc-extras desc)))
         (homepage (cdr (assoc :url extras)))
         (commit (cdr (assoc :commit extras)))
         (keywords (if desc (package-desc--keywords desc)))
         (built-in (eq pkg-dir 'builtin))
         (installable (and archive (not built-in)))
         (status (if desc (package-desc-status desc) "orphan"))
         (incompatible-reason (package--incompatible-p desc))
         (signed (if desc (package-desc-signed desc)))
         (maintainer (cdr (assoc :maintainer extras)))
         (authors (cdr (assoc :authors extras))))
    (when (string= status "avail-obso")
      (setq status "available obsolete"))
    (when incompatible-reason
      (setq status "incompatible"))
    (princ (format "Package %S is %s.\n\n" name status))

    ;; TODO: Remove the string decorations and reformat the strings
    ;; for future l10n.
    (package--print-help-section "Status")
    (cond (built-in
           (insert (propertize (capitalize status)
                               'font-lock-face 'package-status-built-in)
                   "."))
          (pkg-dir
           (insert (propertize (if (member status '("unsigned" "dependency"))
                                   "Installed"
                                 (capitalize status))
                               'font-lock-face 'package-status-built-in))
           (insert (substitute-command-keys " in `"))
           (let ((dir (abbreviate-file-name
                       (file-name-as-directory
                        (if (file-in-directory-p pkg-dir package-user-dir)
                            (file-relative-name pkg-dir package-user-dir)
                          pkg-dir)))))
             (help-insert-xref-button dir 'help-package-def pkg-dir))
           (if (and (package-built-in-p name)
                    (not (package-built-in-p name version)))
               (insert (substitute-command-keys
                        "',\n             shadowing a ")
                       (propertize "built-in package"
                                   'font-lock-face 'package-status-built-in))
             (insert (substitute-command-keys "'")))
           (if signed
               (insert ".")
             (insert " (unsigned)."))
           (when (and (package-desc-p desc)
                      (not required-by)
                      (member status '("unsigned" "installed")))
             (insert " ")
             (package-make-button "Delete"
                                  'action #'package-delete-button-action
                                  'package-desc desc)))
          (incompatible-reason
           (insert (propertize "Incompatible" 'font-lock-face font-lock-warning-face)
                   " because it depends on ")
           (if (stringp incompatible-reason)
               (insert "Emacs " incompatible-reason ".")
             (insert "uninstallable packages.")))
          (installable
           (insert (capitalize status))
           (insert " from " (format "%s" archive))
           (insert " -- ")
           (package-make-button
            "Install"
            'action 'package-install-button-action
            'package-desc desc))
          (t (insert (capitalize status) ".")))
    (insert "\n")
    (unless (and pkg-dir (not archive)) ; Installed pkgs don't have archive.
      (package--print-help-section "Archive"
        (or archive "n/a")))
    (and version
         (package--print-help-section "Version"
           (package-version-join version)))
    (when commit
      (package--print-help-section "Commit" commit))
    (when desc
      (package--print-help-section "Summary"
        (package-desc-summary desc)))

    (setq reqs (if desc (package-desc-reqs desc)))
    (when reqs
      (package--print-help-section "Requires")
      (let ((first t))
        (dolist (req reqs)
          (let* ((name (car req))
                 (vers (cadr req))
                 (text (format "%s-%s" (symbol-name name)
                               (package-version-join vers)))
                 (reason (if (and (listp incompatible-reason)
                                  (assq name incompatible-reason))
                             " (not available)" "")))
            (cond (first (setq first nil))
                  ((>= (+ 2 (current-column) (length text) (length reason))
                       (window-width))
                   (insert ",\n               "))
                  (t (insert ", ")))
            (help-insert-xref-button text 'help-package name)
            (insert reason)))
        (insert "\n")))
    (when required-by
      (package--print-help-section "Required by")
      (let ((first t))
        (dolist (pkg required-by)
          (let ((text (package-desc-full-name pkg)))
            (cond (first (setq first nil))
                  ((>= (+ 2 (current-column) (length text))
                       (window-width))
                   (insert ",\n               "))
                  (t (insert ", ")))
            (help-insert-xref-button text 'help-package
                                     (package-desc-name pkg))))
        (insert "\n")))
    (when homepage
      ;; Prefer https for the homepage of packages on gnu.org.
      (if (string-match-p "^http://\\(elpa\\|www\\)\\.gnu\\.org/" homepage)
          (let ((gnu (cdr (assoc "gnu" package-archives))))
            (and gnu (string-match-p "^https" gnu)
                 (setq homepage
                       (replace-regexp-in-string "^http" "https" homepage)))))
      (package--print-help-section "Homepage")
      (help-insert-xref-button homepage 'help-url homepage)
      (insert "\n"))
    (when keywords
      (package--print-help-section "Keywords")
      (dolist (k keywords)
        (package-make-button
         k
         'package-keyword k
         'action 'package-keyword-button-action)
        (insert " "))
      (insert "\n"))
    (when maintainer
      (package--print-help-section "Maintainer")
      (package--print-email-button maintainer))
    (when authors
      (package--print-help-section
          (if (= (length authors) 1)
              "Author"
            "Authors"))
      (package--print-email-button (pop authors))
      ;; If there's more than one author, indent the rest correctly.
      (dolist (name authors)
        (insert (make-string 13 ?\s))
        (package--print-email-button name)))
    (let* ((all-pkgs (append (cdr (assq name package-alist))
                             (cdr (assq name package-archive-contents))
                             (let ((bi (assq name package--builtins)))
                               (if bi (list (package--from-builtin bi))))))
           (other-pkgs (delete desc all-pkgs)))
      (when other-pkgs
        (package--print-help-section "Other versions"
          (mapconcat (lambda (opkg)
                       (let* ((ov (package-desc-version opkg))
                              (dir (package-desc-dir opkg))
                              (from (or (package-desc-archive opkg)
                                        (if (stringp dir) "installed" dir))))
                         (if (not ov) (format "%s" from)
                           (format "%s (%s)"
                                   (make-text-button (package-version-join ov) nil
                                                     'font-lock-face 'link
                                                     'follow-link t
                                                     'action
                                                     (lambda (_button)
                                                       (describe-package opkg)))
                                   from))))
                     other-pkgs ", ")
          ".")))

    (insert "\n")

    (let ((start-of-description (point)))
      (if built-in
          ;; For built-in packages, get the description from the
          ;; Commentary header.
          (let ((fn (locate-file (format "%s.el" name) load-path
                                 load-file-rep-suffixes))
                (opoint (point)))
            (insert (or (lm-commentary fn) ""))
            (save-excursion
              (goto-char opoint)
              (when (re-search-forward "^;;; Commentary:\n" nil t)
                (replace-match ""))
              (while (re-search-forward "^\\(;+ ?\\)" nil t)
                (replace-match ""))))

        (if (package-installed-p desc)
            ;; For installed packages, get the description from the
            ;; installed files.
            (insert (package--get-description desc))

          ;; For non-built-in, non-installed packages, get description from
          ;; the archive.
          (let* ((basename (format "%s-readme.txt" name))
                 readme-string)

            (package--with-response-buffer (package-archive-base desc)
              :file basename :noerror t
              (save-excursion
                (goto-char (point-max))
                (unless (bolp)
                  (insert ?\n)))
              (cl-assert (not enable-multibyte-characters))
              (setq readme-string
                    ;; The readme.txt files are defined to contain utf-8 text.
                    (decode-coding-region (point-min) (point-max) 'utf-8 t))
              t)
            (insert (or readme-string
                        "This package does not provide a description.")))))
      ;; Make URLs in the description into links.
      (goto-char start-of-description)
      (browse-url-add-buttons))))

(defun package-install-button-action (button)
  "Run `package-install' on the package BUTTON points to.
Used for the `action' property of buttons in the buffer created by
`describe-package'."
  (let ((pkg-desc (button-get button 'package-desc)))
    (when (y-or-n-p (format-message "Install package `%s'? "
                                    (package-desc-full-name pkg-desc)))
      (package-install pkg-desc nil)
      (revert-buffer nil t)
      (goto-char (point-min)))))

(defun package-delete-button-action (button)
  "Run `package-delete' on the package BUTTON points to.
Used for the `action' property of buttons in the buffer created by
`describe-package'."
  (let ((pkg-desc (button-get button 'package-desc)))
    (when (y-or-n-p (format-message "Delete package `%s'? "
                                    (package-desc-full-name pkg-desc)))
      (package-delete pkg-desc)
      (revert-buffer nil t)
      (goto-char (point-min)))))

(defun package-keyword-button-action (button)
  "Show filtered \"*Packages*\" buffer for BUTTON.
The buffer is filtered by the `package-keyword' property of BUTTON.
Used for the `action' property of buttons in the buffer created by
`describe-package'."
  (let ((pkg-keyword (button-get button 'package-keyword)))
    (package-show-package-list t (list pkg-keyword))))

(defun package-make-button (text &rest properties)
  "Insert button labeled TEXT with button PROPERTIES at point.
PROPERTIES are passed to `insert-text-button', for which this
function is a convenience wrapper used by `describe-package-1'."
  (let ((button-text (if (display-graphic-p) text (concat "[" text "]")))
        (button-face (if (display-graphic-p)
                         '(:box (:line-width 2 :color "dark grey")
                                :background "light grey"
                                :foreground "black")
                       'link)))
    (apply #'insert-text-button button-text 'face button-face 'follow-link t
           properties)))

(defun package--print-email-button (recipient)
  "Insert a button whose action will send an email to RECIPIENT.
NAME should have the form (FULLNAME . EMAIL) where FULLNAME is
either a full name or nil, and EMAIL is a valid email address."
  (when (car recipient)
    (insert (car recipient)))
  (when (and (car recipient) (cdr recipient))
    (insert " "))
  (when (cdr recipient)
    (insert "<")
    (insert-text-button (cdr recipient)
                        'follow-link t
                        'action (lambda (_)
                                  (compose-mail
                                   (format "%s <%s>" (car recipient) (cdr recipient)))))
    (insert ">"))
  (insert "\n"))

\f
;;;; Package menu mode.

(defvar package-menu-mode-map
  (let ((map (make-sparse-keymap)))
    (set-keymap-parent map tabulated-list-mode-map)
    (define-key map "\C-m" 'package-menu-describe-package)
    (define-key map "u" 'package-menu-mark-unmark)
    (define-key map "\177" 'package-menu-backup-unmark)
    (define-key map "d" 'package-menu-mark-delete)
    (define-key map "i" 'package-menu-mark-install)
    (define-key map "U" 'package-menu-mark-upgrades)
    (define-key map "r" 'revert-buffer)
    (define-key map (kbd "/ k") 'package-menu-filter-by-keyword)
    (define-key map (kbd "/ n") 'package-menu-filter-by-name)
    (define-key map (kbd "/ /") 'package-menu-clear-filter)
    (define-key map "~" 'package-menu-mark-obsolete-for-deletion)
    (define-key map "x" 'package-menu-execute)
    (define-key map "h" 'package-menu-quick-help)
    (define-key map "H" #'package-menu-hide-package)
    (define-key map "?" 'package-menu-describe-package)
    (define-key map "(" #'package-menu-toggle-hiding)
    map)
  "Local keymap for `package-menu-mode' buffers.")

(easy-menu-define package-menu-mode-menu package-menu-mode-map
  "Menu for `package-menu-mode'."
  '("Package"
    ["Describe Package" package-menu-describe-package :help "Display information about this package"]
    ["Help" package-menu-quick-help :help "Show short key binding help for package-menu-mode"]
    "--"
    ["Refresh Package List" revert-buffer
     :help "Redownload the package archive(s)"
     :active (not package--downloads-in-progress)]
    ["Execute Marked Actions" package-menu-execute :help "Perform all the marked actions"]

    "--"
    ["Mark All Available Upgrades" package-menu-mark-upgrades
     :help "Mark packages that have a newer version for upgrading"
     :active (not package--downloads-in-progress)]
    ["Mark All Obsolete for Deletion" package-menu-mark-obsolete-for-deletion :help "Mark all obsolete packages for deletion"]
    ["Mark for Install" package-menu-mark-install :help "Mark a package for installation and move to the next line"]
    ["Mark for Deletion" package-menu-mark-delete :help "Mark a package for deletion and move to the next line"]
    ["Unmark" package-menu-mark-unmark :help "Clear any marks on a package and move to the next line"]

    "--"
    ("Filter Packages"
     ["Filter by Keyword" package-menu-filter-by-keyword :help "Filter packages by keyword"]
     ["Filter by Name" package-menu-filter-by-name :help "Filter packages by name"]
     ["Clear Filter" package-menu-clear-filter :help "Clear package list filter"])

    ["Hide by Regexp" package-menu-hide-package :help "Hide all packages matching a regexp"]
    ["Display Older Versions" package-menu-toggle-hiding
     :style toggle :selected (not package-menu--hide-packages)
     :help "Display package even if a newer version is already installed"]

    "--"
    ["Quit" quit-window :help "Quit package selection"]
    ["Customize" (customize-group 'package)]))

(defvar package-menu--new-package-list nil
  "List of newly-available packages since `list-packages' was last called.")

(defvar package-menu--transaction-status nil
  "Mode-line status of ongoing package transaction.")

(define-derived-mode package-menu-mode tabulated-list-mode "Package Menu"
  "Major mode for browsing a list of packages.
Letters do not insert themselves; instead, they are commands.
\\<package-menu-mode-map>
\\{package-menu-mode-map}"
  (setq mode-line-process '((package--downloads-in-progress ":Loading")
                            (package-menu--transaction-status
                             package-menu--transaction-status)))
  (setq tabulated-list-format
        `[("Package" 18 package-menu--name-predicate)
          ("Version" 13 package-menu--version-predicate)
          ("Status"  10 package-menu--status-predicate)
          ,@(if (cdr package-archives)
                '(("Archive" 10 package-menu--archive-predicate)))
          ("Description" 0 package-menu--description-predicate)])
  (setq tabulated-list-padding 2)
  (setq tabulated-list-sort-key (cons "Status" nil))
  (add-hook 'tabulated-list-revert-hook #'package-menu--refresh nil t)
  (tabulated-list-init-header)
  (setq revert-buffer-function 'package-menu--refresh-contents)
  (setf imenu-prev-index-position-function
        #'package--imenu-prev-index-position-function)
  (setf imenu-extract-index-name-function
        #'package--imenu-extract-index-name-function))

(defmacro package--push (pkg-desc status listname)
  "Convenience macro for `package-menu--generate'.
If the alist stored in the symbol LISTNAME lacks an entry for a
package PKG-DESC, add one.  The alist is keyed with PKG-DESC."
  (declare (obsolete nil "27.1"))
  `(unless (assoc ,pkg-desc ,listname)
     ;; FIXME: Should we move status into pkg-desc?
     (push (cons ,pkg-desc ,status) ,listname)))

(defvar package-list-unversioned nil
  "If non-nil, include packages that don't have a version in `list-packages'.")

(defvar package-list-unsigned nil
  "If non-nil, mention in the list which packages were installed w/o signature.")

(defvar package--emacs-version-list (version-to-list emacs-version)
  "The value of variable `emacs-version' as a list.")

(defun package--ensure-package-menu-mode ()
  "Signal a user-error if major mode is not `package-menu-mode'."
  (unless (derived-mode-p 'package-menu-mode)
    (user-error "The current buffer is not a Package Menu")))

(defun package--incompatible-p (pkg &optional shallow)
  "Return non-nil if PKG has no chance of being installable.
PKG is a `package-desc' object.

If SHALLOW is non-nil, this only checks if PKG depends on a
higher `emacs-version' than the one being used.  Otherwise, also
checks the viability of dependencies, according to
`package--compatibility-table'.

If PKG requires an incompatible Emacs version, the return value
is this version (as a string).
If PKG requires incompatible packages, the return value is a list
of these dependencies, similar to the list returned by
`package-desc-reqs'."
  (let* ((reqs    (package-desc-reqs pkg))
         (version (cadr (assq 'emacs reqs))))
    (if (and version (version-list-< package--emacs-version-list version))
        (package-version-join version)
      (unless shallow
        (let (out)
          (dolist (dep (package-desc-reqs pkg) out)
            (let ((dep-name (car dep)))
              (unless (eq 'emacs dep-name)
                (let ((cv (gethash dep-name package--compatibility-table)))
                  (when (version-list-< (or cv '(0)) (or (cadr dep) '(0)))
                    (push dep out)))))))))))

(defun package-desc-status (pkg-desc)
  "Return the status of `package-desc' object PKG-DESC."
  (let* ((name (package-desc-name pkg-desc))
         (dir (package-desc-dir pkg-desc))
         (lle (assq name package-load-list))
         (held (cadr lle))
         (version (package-desc-version pkg-desc))
         (signed (or (not package-list-unsigned)
                     (package-desc-signed pkg-desc))))
    (cond
     ((eq dir 'builtin) "built-in")
     ((and lle (null held)) "disabled")
     ((stringp held)
      (let ((hv (if (stringp held) (version-to-list held))))
        (cond
         ((version-list-= version hv) "held")
         ((version-list-< version hv) "obsolete")
         (t "disabled"))))
     (dir                               ;One of the installed packages.
      (cond
       ((not (file-exists-p dir)) "deleted")
       ;; Not inside `package-user-dir'.
       ((not (file-in-directory-p dir package-user-dir)) "external")
       ((eq pkg-desc (cadr (assq name package-alist)))
        (if (not signed) "unsigned"
          (if (package--user-selected-p name)
              "installed" "dependency")))
       (t "obsolete")))
     ((package--incompatible-p pkg-desc) "incompat")
     (t
      (let* ((ins (cadr (assq name package-alist)))
             (ins-v (if ins (package-desc-version ins))))
        (cond
         ;; Installed obsolete packages are handled in the `dir'
         ;; clause above.  Here we handle available obsolete, which
         ;; are displayed depending on `package-menu--hide-packages'.
         ((and ins (version-list-<= version ins-v)) "avail-obso")
         (t
          (if (memq name package-menu--new-package-list)
              "new" "available"))))))))

(defvar package-menu--hide-packages t
  "Whether available obsolete packages should be hidden.
Can be toggled with \\<package-menu-mode-map> \\[package-menu-toggle-hiding].
Installed obsolete packages are always displayed.")

(defun package-menu-toggle-hiding ()
  "In Package Menu, toggle visibility of obsolete available packages.

Also hide packages whose name matches a regexp in user option
`package-hidden-regexps' (a list).  To add regexps to this list,
use `package-menu-hide-package'."
  (interactive)
  (package--ensure-package-menu-mode)
  (setq package-menu--hide-packages
        (not package-menu--hide-packages))
  (if package-menu--hide-packages
      (message "Hiding obsolete or unwanted packages")
    (message "Displaying all packages"))
  (revert-buffer nil 'no-confirm))

(defun package--remove-hidden (pkg-list)
  "Filter PKG-LIST according to `package-archive-priorities'.
PKG-LIST must be a list of `package-desc' objects, all with the
same name, sorted by decreasing `package-desc-priority-version'.
Return a list of packages tied for the highest priority according
to their archives."
  (when pkg-list
    ;; Variable toggled with `package-menu-toggle-hiding'.
    (if (not package-menu--hide-packages)
        pkg-list
      (let ((installed (cadr (assq (package-desc-name (car pkg-list))
                                   package-alist))))
        (when installed
          (setq pkg-list
                (let ((ins-version (package-desc-version installed)))
                  (cl-remove-if (lambda (p) (version-list-< (package-desc-version p)
                                                       ins-version))
                                pkg-list))))
        (let ((filtered-by-priority
               (cond
                ((not package-menu-hide-low-priority)
                 pkg-list)
                ((eq package-menu-hide-low-priority 'archive)
                 (let (max-priority out)
                   (while pkg-list
                     (let ((p (pop pkg-list)))
                       (let ((priority (package-desc-priority p)))
                         (if (and max-priority (< priority max-priority))
                             (setq pkg-list nil)
                           (push p out)
                           (setq max-priority priority)))))
                   (nreverse out)))
                (pkg-list
                 (list (car pkg-list))))))
          (if (not installed)
              filtered-by-priority
            (let ((ins-version (package-desc-version installed)))
              (cl-remove-if (lambda (p) (version-list-= (package-desc-version p)
                                                   ins-version))
                            filtered-by-priority))))))))

(defcustom package-hidden-regexps nil
  "List of regexps matching the name of packages to hide.
If the name of a package matches any of these regexps it is
omitted from the package menu.  To toggle this, type \\[package-menu-toggle-hiding].

Values can be interactively added to this list by typing
\\[package-menu-hide-package] on a package."
  :version "25.1"
  :type '(repeat (regexp :tag "Hide packages with name matching")))

(defun package-menu--refresh (&optional packages keywords)
  "Re-populate the `tabulated-list-entries'.
PACKAGES should be nil or t, which means to display all known packages.
KEYWORDS should be nil or a list of keywords."
  ;; Construct list of (PKG-DESC . STATUS).
  (unless packages (setq packages t))
  (let ((hidden-names (mapconcat #'identity package-hidden-regexps "\\|"))
        info-list)
    ;; Installed packages:
    (dolist (elt package-alist)
      (let ((name (car elt)))
        (when (or (eq packages t) (memq name packages))
          (dolist (pkg (cdr elt))
            (when (package--has-keyword-p pkg keywords)
              (push pkg info-list))))))

    ;; Built-in packages:
    (dolist (elt package--builtins)
      (let ((pkg  (package--from-builtin elt))
            (name (car elt)))
        (when (not (eq name 'emacs)) ; Hide the `emacs' package.
          (when (and (package--has-keyword-p pkg keywords)
                     (or package-list-unversioned
                         (package--bi-desc-version (cdr elt)))
                     (or (eq packages t) (memq name packages)))
            (push pkg info-list)))))

    ;; Available and disabled packages:
    (unless (equal package--old-archive-priorities package-archive-priorities)
      (package-read-all-archive-contents))
    (dolist (elt package-archive-contents)
      (let ((name (car elt)))
        ;; To be displayed it must be in PACKAGES;
        (when (and (or (eq packages t) (memq name packages))
                   ;; and we must either not be hiding anything,
                   (or (not package-menu--hide-packages)
                       (not package-hidden-regexps)
                       ;; or just not hiding this specific package.
                       (not (string-match hidden-names (symbol-name name)))))
          ;; Hide available-obsolete or low-priority packages.
          (dolist (pkg (package--remove-hidden (cdr elt)))
            (when (package--has-keyword-p pkg keywords)
              (push pkg info-list))))))

    ;; Print the result.
    (tabulated-list-init-header)
    (setq tabulated-list-entries
          (mapcar #'package-menu--print-info-simple info-list))))

(defun package-all-keywords ()
  "Collect all package keywords."
  (let ((key-list))
    (package--mapc (lambda (desc)
                     (setq key-list (append (package-desc--keywords desc)
                                            key-list))))
    key-list))

(defun package--mapc (function &optional packages)
  "Call FUNCTION for all known PACKAGES.
PACKAGES can be nil or t, which means to display all known
packages, or a list of packages.

Built-in packages are converted with `package--from-builtin'."
  (unless packages (setq packages t))
  (let (name)
    ;; Installed packages:
    (dolist (elt package-alist)
      (setq name (car elt))
      (when (or (eq packages t) (memq name packages))
        (mapc function (cdr elt))))

    ;; Built-in packages:
    (dolist (elt package--builtins)
      (setq name (car elt))
      (when (and (not (eq name 'emacs)) ; Hide the `emacs' package.
                 (or package-list-unversioned
                     (package--bi-desc-version (cdr elt)))
                 (or (eq packages t) (memq name packages)))
        (funcall function (package--from-builtin elt))))

    ;; Available and disabled packages:
    (dolist (elt package-archive-contents)
      (setq name (car elt))
      (when (or (eq packages t) (memq name packages))
        (dolist (pkg (cdr elt))
          ;; Hide obsolete packages.
          (unless (package-installed-p (package-desc-name pkg)
                                       (package-desc-version pkg))
        (funcall function pkg)))))))

(defun package--has-keyword-p (desc &optional keywords)
  "Test if package DESC has any of the given KEYWORDS.
When none are given, the package matches."
  (if keywords
      (let ((desc-keywords (and desc (package-desc--keywords desc)))
            found)
        (while (and (not found) keywords)
          (let ((k (pop keywords)))
            (setq found
                  (or (string= k (concat "arc:" (package-desc-archive desc)))
                      (string= k (concat "status:" (package-desc-status desc)))
                      (member k desc-keywords)))))
        found)
    t))

(defun package-menu--generate (remember-pos packages &optional keywords)
  "Populate the Package Menu.
If REMEMBER-POS is non-nil, keep point on the same entry.
PACKAGES should be t, which means to display all known packages,
or a list of package names (symbols) to display.

With KEYWORDS given, only packages with those keywords are
shown."
  (package-menu--refresh packages keywords)
  (setf (car (aref tabulated-list-format 0))
        (if keywords
            (let ((filters (mapconcat #'identity keywords ",")))
              (concat "Package[" filters "]"))
          "Package"))
  (tabulated-list-init-header)
  (tabulated-list-print remember-pos))

(defun package-menu--print-info (pkg)
  "Return a package entry suitable for `tabulated-list-entries'.
PKG has the form (PKG-DESC . STATUS).
Return (PKG-DESC [NAME VERSION STATUS DOC])."
  (package-menu--print-info-simple (car pkg)))
(make-obsolete 'package-menu--print-info
               'package-menu--print-info-simple "25.1")

\f
;;; Package menu faces

(defface package-name
  '((t :inherit link))
  "Face used on package names in the package menu."
  :version "25.1")

(defface package-description
  '((t :inherit default))
  "Face used on package description summaries in the package menu."
  :version "25.1")

;; Shame this hyphenates "built-in", when "font-lock-builtin-face" doesn't.
(defface package-status-built-in
  '((t :inherit font-lock-builtin-face))
  "Face used on the status and version of built-in packages."
  :version "25.1")

(defface package-status-external
  '((t :inherit package-status-built-in))
  "Face used on the status and version of external packages."
  :version "25.1")

(defface package-status-available
  '((t :inherit default))
  "Face used on the status and version of available packages."
  :version "25.1")

(defface package-status-new
  '((t :inherit (bold package-status-available)))
  "Face used on the status and version of new packages."
  :version "25.1")

(defface package-status-held
  '((t :inherit font-lock-constant-face))
  "Face used on the status and version of held packages."
  :version "25.1")

(defface package-status-disabled
  '((t :inherit font-lock-warning-face))
  "Face used on the status and version of disabled packages."
  :version "25.1")

(defface package-status-installed
  '((t :inherit font-lock-comment-face))
  "Face used on the status and version of installed packages."
  :version "25.1")

(defface package-status-dependency
  '((t :inherit package-status-installed))
  "Face used on the status and version of dependency packages."
  :version "25.1")

(defface package-status-unsigned
  '((t :inherit font-lock-warning-face))
  "Face used on the status and version of unsigned packages."
  :version "25.1")

(defface package-status-incompat
  '((t :inherit error))
  "Face used on the status and version of incompat packages."
  :version "25.1")

(defface package-status-avail-obso
  '((t :inherit package-status-incompat))
  "Face used on the status and version of avail-obso packages."
  :version "25.1")

\f
;;; Package menu printing

(defun package-menu--print-info-simple (pkg)
  "Return a package entry suitable for `tabulated-list-entries'.
PKG is a `package-desc' object.
Return (PKG-DESC [NAME VERSION STATUS DOC])."
  (let* ((status  (package-desc-status pkg))
         (face (pcase status
                 ("built-in"  'package-status-built-in)
                 ("external"  'package-status-external)
                 ("available" 'package-status-available)
                 ("avail-obso" 'package-status-avail-obso)
                 ("new"       'package-status-new)
                 ("held"      'package-status-held)
                 ("disabled"  'package-status-disabled)
                 ("installed" 'package-status-installed)
                 ("dependency" 'package-status-dependency)
                 ("unsigned"  'package-status-unsigned)
                 ("incompat"  'package-status-incompat)
                 (_            'font-lock-warning-face)))) ; obsolete.
    (list pkg
          `[(,(symbol-name (package-desc-name pkg))
             face package-name
             font-lock-face package-name
             follow-link t
             package-desc ,pkg
             action package-menu-describe-package)
            ,(propertize (package-version-join
                          (package-desc-version pkg))
                         'font-lock-face face)
            ,(propertize status 'font-lock-face face)
            ,@(if (cdr package-archives)
                  (list (propertize (or (package-desc-archive pkg) "")
                                    'font-lock-face face)))
            ,(propertize (package-desc-summary pkg)
                         'font-lock-face 'package-description)])))

(defvar package-menu--old-archive-contents nil
  "`package-archive-contents' before the latest refresh.")

(defun package-menu--refresh-contents (&optional _arg _noconfirm)
  "In Package Menu, download the Emacs Lisp package archive.
Fetch the contents of each archive specified in
`package-archives', and then refresh the package menu.

`package-menu-mode' sets `revert-buffer-function' to this
function.  The args ARG and NOCONFIRM, passed from
`revert-buffer', are ignored."
  (package--ensure-package-menu-mode)
  (setq package-menu--old-archive-contents package-archive-contents)
  (setq package-menu--new-package-list nil)
  (package-refresh-contents package-menu-async))
(define-obsolete-function-alias 'package-menu-refresh 'revert-buffer "27.1")

(defun package-menu-hide-package ()
  "Hide in Package Menu packages that match a regexp.
Prompt for the regexp to match against package names.
The default regexp will hide only the package whose name is at point.

The regexp is added to the list in the user option
`package-hidden-regexps' and saved for future sessions.

To unhide a package, type
`\\[customize-variable] RET package-hidden-regexps'.

Type \\[package-menu-toggle-hiding] to toggle package hiding."
  (interactive)
  (package--ensure-package-menu-mode)
  (declare (interactive-only "change `package-hidden-regexps' instead."))
  (let* ((name (when (derived-mode-p 'package-menu-mode)
                 (concat "\\`" (regexp-quote (symbol-name (package-desc-name
                                                           (tabulated-list-get-id))))
                         "\\'")))
         (re (read-string "Hide packages matching regexp: " name)))
    ;; Test if it is valid.
    (string-match re "")
    (push re package-hidden-regexps)
    (customize-save-variable 'package-hidden-regexps package-hidden-regexps)
    (package-menu--post-refresh)
    (let ((hidden
           (cl-remove-if-not (lambda (e) (string-match re (symbol-name (car e))))
                             package-archive-contents)))
      (message "Packages to hide: %d.  Type `%s' to toggle or `%s' to customize"
               (length hidden)
               (substitute-command-keys "\\[package-menu-toggle-hiding]")
               (substitute-command-keys "\\[customize-variable] RET package-hidden-regexps")))))


(defun package-menu-describe-package (&optional button)
  "Describe the current package.
If optional arg BUTTON is non-nil, describe its associated package."
  (interactive)
  (let ((pkg-desc (if button (button-get button 'package-desc)
                    (tabulated-list-get-id))))
    (if pkg-desc
        (describe-package pkg-desc)
      (user-error "No package here"))))

;; fixme numeric argument
(defun package-menu-mark-delete (&optional _num)
  "Mark a package for deletion and move to the next line."
  (interactive "p")
  (package--ensure-package-menu-mode)
  (if (member (package-menu-get-status)
              '("installed" "dependency" "obsolete" "unsigned"))
      (tabulated-list-put-tag "D" t)
    (forward-line)))

(defun package-menu-mark-install (&optional _num)
  "Mark a package for installation and move to the next line."
  (interactive "p")
  (package--ensure-package-menu-mode)
  (if (member (package-menu-get-status) '("available" "avail-obso" "new" "dependency"))
      (tabulated-list-put-tag "I" t)
    (forward-line)))

(defun package-menu-mark-unmark (&optional _num)
  "Clear any marks on a package and move to the next line."
  (interactive "p")
  (package--ensure-package-menu-mode)
  (tabulated-list-put-tag " " t))

(defun package-menu-backup-unmark ()
  "Back up one line and clear any marks on that package."
  (interactive)
  (package--ensure-package-menu-mode)
  (forward-line -1)
  (tabulated-list-put-tag " "))

(defun package-menu-mark-obsolete-for-deletion ()
  "Mark all obsolete packages for deletion."
  (interactive)
  (package--ensure-package-menu-mode)
  (save-excursion
    (goto-char (point-min))
    (while (not (eobp))
      (if (equal (package-menu-get-status) "obsolete")
          (tabulated-list-put-tag "D" t)
        (forward-line 1)))))

(defvar package--quick-help-keys
  '(("install," "delete," "unmark," ("execute" . 1))
    ("next," "previous")
    ("Hide-package," "(-toggle-hidden")
    ("g-refresh-contents," "/-filter," "help")))

(defun package--prettify-quick-help-key (desc)
  "Prettify DESC to be displayed as a help menu."
  (if (listp desc)
      (if (listp (cdr desc))
          (mapconcat #'package--prettify-quick-help-key desc "   ")
        (let ((place (cdr desc))
              (out (copy-sequence (car desc))))
          (add-text-properties place (1+ place)
                               '(face (bold font-lock-warning-face))
                               out)
          out))
    (package--prettify-quick-help-key (cons desc 0))))

(defun package-menu-quick-help ()
  "Show short key binding help for `package-menu-mode'.
The full list of keys can be viewed with \\[describe-mode]."
  (interactive)
  (package--ensure-package-menu-mode)
  (message (mapconcat #'package--prettify-quick-help-key
                      package--quick-help-keys "\n")))

(define-obsolete-function-alias
  'package-menu-view-commentary 'package-menu-describe-package "24.1")

(defun package-menu-get-status ()
  "Return status text of package at point in Package Menu."
  (package--ensure-package-menu-mode)
  (let* ((id (tabulated-list-get-id))
         (entry (and id (assoc id tabulated-list-entries))))
    (if entry
        (aref (cadr entry) 2)
      "")))

(defun package-archive-priority (archive)
  "Return the priority of ARCHIVE.

The archive priorities are specified in
`package-archive-priorities'.  If not given there, the priority
defaults to 0."
  (or (cdr (assoc archive package-archive-priorities))
      0))

(defun package-desc-priority-version (pkg-desc)
  "Return the version PKG-DESC with the archive priority prepended.

This allows for easy comparison of package versions from
different archives if archive priorities are meant to be taken in
consideration."
  (cons (package-desc-priority pkg-desc)
        (package-desc-version pkg-desc)))

(defun package-menu--find-upgrades ()
  "In Package Menu, return an alist of packages that can be upgraded.
The alist has the same form as `package-alist', namely a list
of (PKG . DESCS), but where DESCS is the `package-desc' object
corresponding to the newer version."
  (let (installed available upgrades)
    ;; Build list of installed/available packages in this buffer.
    (dolist (entry tabulated-list-entries)
      ;; ENTRY is (PKG-DESC [NAME VERSION STATUS DOC])
      (let ((pkg-desc (car entry))
            (status (aref (cadr entry) 2)))
        (cond ((member status '("installed" "dependency" "unsigned"))
               (push pkg-desc installed))
              ((member status '("available" "new"))
               (setq available (package--append-to-alist pkg-desc available))))))
    ;; Loop through list of installed packages, finding upgrades.
    (dolist (pkg-desc installed)
      (let* ((name (package-desc-name pkg-desc))
             (avail-pkg (cadr (assq name available))))
        (and avail-pkg
             (version-list-< (package-desc-priority-version pkg-desc)
                             (package-desc-priority-version avail-pkg))
             (push (cons name avail-pkg) upgrades))))
    upgrades))

(defvar package-menu--mark-upgrades-pending nil
  "Whether mark-upgrades is waiting for a refresh to finish.")

(defun package-menu--mark-upgrades-1 ()
  "Mark all upgradable packages in the Package Menu.
Implementation of `package-menu-mark-upgrades'."
  (setq package-menu--mark-upgrades-pending nil)
  (let ((upgrades (package-menu--find-upgrades)))
    (if (null upgrades)
        (message "No packages to upgrade")
      (widen)
      (save-excursion
        (goto-char (point-min))
        (while (not (eobp))
          (let* ((pkg-desc (tabulated-list-get-id))
                 (upgrade (cdr (assq (package-desc-name pkg-desc) upgrades))))
            (cond ((null upgrade)
                   (forward-line 1))
                  ((equal pkg-desc upgrade)
                   (package-menu-mark-install))
                  (t
                   (package-menu-mark-delete))))))
      (message "Packages marked for upgrading: %d"
               (length upgrades)))))


(defun package-menu-mark-upgrades ()
  "Mark all upgradable packages in the Package Menu.
For each installed package with a newer version available, place
an (I)nstall flag on the available version and a (D)elete flag on
the installed version.  A subsequent \\[package-menu-execute]
call will upgrade the package.

If there's an async refresh operation in progress, the flags will
be placed as part of `package-menu--post-refresh' instead of
immediately."
  (interactive)
  (package--ensure-package-menu-mode)
  (if (not package--downloads-in-progress)
      (package-menu--mark-upgrades-1)
    (setq package-menu--mark-upgrades-pending t)
    (message "Waiting for refresh to finish...")))

(defun package-menu--list-to-prompt (packages)
  "Return a string listing PACKAGES that's usable in a prompt.
PACKAGES is a list of `package-desc' objects.
Formats the returned string to be usable in a minibuffer
prompt (see `package-menu--prompt-transaction-p')."
  ;; The case where `package' is empty is handled in
  ;; `package-menu--prompt-transaction-p' below.
  (format "%d (%s)"
          (length packages)
          (mapconcat #'package-desc-full-name packages " ")))


(defun package-menu--prompt-transaction-p (delete install upgrade)
  "Prompt the user about DELETE, INSTALL, and UPGRADE.
DELETE, INSTALL, and UPGRADE are lists of `package-desc' objects.
Either may be nil, but not all."
  (y-or-n-p
   (concat
    (when delete
      (format "Packages to delete: %s.  " (package-menu--list-to-prompt delete)))
    (when install
      (format "Packages to install: %s.  " (package-menu--list-to-prompt install)))
    (when upgrade
      (format "Packages to upgrade: %s.  " (package-menu--list-to-prompt upgrade)))
    "Proceed? ")))


(defun package-menu--partition-transaction (install delete)
  "Return an alist describing an INSTALL DELETE transaction.
Alist contains three entries, upgrade, delete, and install, each
with a list of package names.

The upgrade entry contains any `package-desc' objects in INSTALL
whose name coincides with an object in DELETE.  The delete and
the install entries are the same as DELETE and INSTALL with such
objects removed."
  (let* ((upg (cl-intersection install delete :key #'package-desc-name))
         (ins (cl-set-difference install upg :key #'package-desc-name))
         (del (cl-set-difference delete upg :key #'package-desc-name)))
    `((delete . ,del) (install . ,ins) (upgrade . ,upg))))

(defun package-menu--perform-transaction (install-list delete-list)
  "Install packages in INSTALL-LIST and delete DELETE-LIST."
  (if install-list
      (let ((status-format (format ":Installing %%d/%d"
                             (length install-list)))
            (i 0)
            (package-menu--transaction-status))
        (dolist (pkg install-list)
          (setq package-menu--transaction-status
                (format status-format (cl-incf i)))
          (force-mode-line-update)
          (redisplay 'force)
          ;; Don't mark as selected, `package-menu-execute' already
          ;; does that.
          (package-install pkg 'dont-select))))
  (let ((package-menu--transaction-status ":Deleting"))
    (force-mode-line-update)
    (redisplay 'force)
    (dolist (elt (package--sort-by-dependence delete-list))
      (condition-case-unless-debug err
          (let ((inhibit-message (or inhibit-message package-menu-async)))
            (package-delete elt nil 'nosave))
        (error (message "Error trying to delete `%s': %S"
                 (package-desc-full-name elt)
                 err))))))

(defun package--update-selected-packages (add remove)
  "Update the `package-selected-packages' list according to ADD and REMOVE.
ADD and REMOVE must be disjoint lists of package names (or
`package-desc' objects) to be added and removed to the selected
packages list, respectively."
  (dolist (p add)
    (cl-pushnew (if (package-desc-p p) (package-desc-name p) p)
                package-selected-packages))
  (dolist (p remove)
    (setq package-selected-packages
          (remove (if (package-desc-p p) (package-desc-name p) p)
                  package-selected-packages)))
  (when (or add remove)
    (package--save-selected-packages package-selected-packages)))

(defun package-menu-execute (&optional noquery)
  "Perform marked Package Menu actions.
Packages marked for installation are downloaded and installed;
packages marked for deletion are removed.
Optional argument NOQUERY non-nil means do not ask the user to confirm."
  (interactive)
  (package--ensure-package-menu-mode)
  (let (install-list delete-list cmd pkg-desc)
    (save-excursion
      (goto-char (point-min))
      (while (not (eobp))
        (setq cmd (char-after))
        (unless (eq cmd ?\s)
          ;; This is the key PKG-DESC.
          (setq pkg-desc (tabulated-list-get-id))
          (cond ((eq cmd ?D)
                 (push pkg-desc delete-list))
                ((eq cmd ?I)
                 (push pkg-desc install-list))))
        (forward-line)))
    (unless (or delete-list install-list)
      (user-error "No operations specified"))
    (let-alist (package-menu--partition-transaction install-list delete-list)
      (when (or noquery
                (package-menu--prompt-transaction-p .delete .install .upgrade))
        (let ((message-template
               (concat "[ "
                       (when .delete
                         (format "Delete %d " (length .delete)))
                       (when .install
                         (format "Install %d " (length .install)))
                       (when .upgrade
                         (format "Upgrade %d " (length .upgrade)))
                       "]")))
          (message "Operation %s started" message-template)
          ;; Packages being upgraded are not marked as selected.
          (package--update-selected-packages .install .delete)
          (package-menu--perform-transaction install-list delete-list)
          (when package-selected-packages
            (if-let* ((removable (package--removable-packages)))
                (message "Operation finished.  Packages that are no longer needed: %d.  Type `%s' to remove them"
                         (length removable)
                         (substitute-command-keys "\\[package-autoremove]"))
              (message "Operation %s finished" message-template))))))))

(defun package-menu--version-predicate (A B)
  "Predicate to sort \"*Packages*\" buffer by the version column.
This is used for `tabulated-list-format' in `package-menu-mode'."
  (let ((vA (or (version-to-list (aref (cadr A) 1)) '(0)))
        (vB (or (version-to-list (aref (cadr B) 1)) '(0))))
    (if (version-list-= vA vB)
        (package-menu--name-predicate A B)
      (version-list-< vA vB))))

(defun package-menu--status-predicate (A B)
  "Predicate to sort \"*Packages*\" buffer by the status column.
This is used for `tabulated-list-format' in `package-menu-mode'."
  (let ((sA (aref (cadr A) 2))
        (sB (aref (cadr B) 2)))
    (cond ((string= sA sB)
           (package-menu--name-predicate A B))
          ((string= sA "new") t)
          ((string= sB "new") nil)
          ((string-prefix-p "avail" sA)
           (if (string-prefix-p "avail" sB)
               (package-menu--name-predicate A B)
             t))
          ((string-prefix-p "avail" sB) nil)
          ((string= sA "installed") t)
          ((string= sB "installed") nil)
          ((string= sA "dependency") t)
          ((string= sB "dependency") nil)
          ((string= sA "unsigned") t)
          ((string= sB "unsigned") nil)
          ((string= sA "held") t)
          ((string= sB "held") nil)
          ((string= sA "external") t)
          ((string= sB "external") nil)
          ((string= sA "built-in") t)
          ((string= sB "built-in") nil)
          ((string= sA "obsolete") t)
          ((string= sB "obsolete") nil)
          ((string= sA "incompat") t)
          ((string= sB "incompat") nil)
          (t (string< sA sB)))))

(defun package-menu--description-predicate (A B)
  "Predicate to sort \"*Packages*\" buffer by the description column.
This is used for `tabulated-list-format' in `package-menu-mode'."
  (let ((dA (aref (cadr A) (if (cdr package-archives) 4 3)))
        (dB (aref (cadr B) (if (cdr package-archives) 4 3))))
    (if (string= dA dB)
        (package-menu--name-predicate A B)
      (string< dA dB))))

(defun package-menu--name-predicate (A B)
  "Predicate to sort \"*Packages*\" buffer by the name column.
This is used for `tabulated-list-format' in `package-menu-mode'."
  (string< (symbol-name (package-desc-name (car A)))
           (symbol-name (package-desc-name (car B)))))

(defun package-menu--archive-predicate (A B)
  "Predicate to sort \"*Packages*\" buffer by the archive column.
This is used for `tabulated-list-format' in `package-menu-mode'."
  (let ((a (or (package-desc-archive (car A)) ""))
        (b (or (package-desc-archive (car B)) "")))
    (if (string= a b)
        (package-menu--name-predicate A B)
      (string< a b))))

(defun package-menu--populate-new-package-list ()
  "Decide which packages are new in `package-archive-contents'.
Store this list in `package-menu--new-package-list'."
  ;; Find which packages are new.
  (when package-menu--old-archive-contents
    (dolist (elt package-archive-contents)
      (unless (assq (car elt) package-menu--old-archive-contents)
        (push (car elt) package-menu--new-package-list)))
    (setq package-menu--old-archive-contents nil)))

(defun package-menu--find-and-notify-upgrades ()
  "Notify the user of upgradable packages."
  (when-let* ((upgrades (package-menu--find-upgrades)))
    (message "Packages that can be upgraded: %d; type `%s' to mark for upgrading."
             (length upgrades)
             (substitute-command-keys "\\[package-menu-mark-upgrades]"))))


(defun package-menu--post-refresh ()
  "Revert \"*Packages*\" buffer and check for new packages and upgrades.
Do nothing if there's no *Packages* buffer.

This function is called after `package-refresh-contents' and it
is added to `post-command-hook' by any function which alters the
package database (`package-install' and `package-delete').  When
run, it removes itself from `post-command-hook'."
  (remove-hook 'post-command-hook #'package-menu--post-refresh)
  (let ((buf (get-buffer "*Packages*")))
    (when (buffer-live-p buf)
      (with-current-buffer buf
        (package-menu--populate-new-package-list)
        (run-hooks 'tabulated-list-revert-hook)
        (tabulated-list-print 'remember 'update)))))

(defun package-menu--mark-or-notify-upgrades ()
  "If there's a *Packages* buffer, check for upgrades and possibly mark them.
Do nothing if there's no *Packages* buffer.  If there are
upgrades, mark them if `package-menu--mark-upgrades-pending' is
non-nil, otherwise just notify the user that there are upgrades.
This function is called after `package-refresh-contents'."
  (let ((buf (get-buffer "*Packages*")))
    (when (buffer-live-p buf)
      (with-current-buffer buf
        (if package-menu--mark-upgrades-pending
            (package-menu--mark-upgrades-1)
          (package-menu--find-and-notify-upgrades))))))

;;;###autoload
(defun list-packages (&optional no-fetch)
  "Display a list of packages.
This first fetches the updated list of packages before
displaying, unless a prefix argument NO-FETCH is specified.
The list is displayed in a buffer named `*Packages*', and
includes the package's version, availability status, and a
short description."
  (interactive "P")
  (require 'finder-inf nil t)
  ;; Initialize the package system if necessary.
  (unless package--initialized
    (package-initialize t))
  ;; Integrate the package-menu with updating the archives.
  (add-hook 'package--post-download-archives-hook
            #'package-menu--post-refresh)
  (add-hook 'package--post-download-archives-hook
            #'package-menu--mark-or-notify-upgrades 'append)

  ;; Generate the Package Menu.
  (let ((buf (get-buffer-create "*Packages*")))
    (with-current-buffer buf
      ;; Since some packages have their descriptions include non-ASCII
      ;; characters...
      (setq buffer-file-coding-system 'utf-8)
      (package-menu-mode)

      ;; Fetch the remote list of packages.
      (unless no-fetch (package-menu--refresh-contents))

      ;; If we're not async, this would be redundant.
      (when package-menu-async
        (package-menu--generate nil t)))
    ;; The package menu buffer has keybindings.  If the user types
    ;; `M-x list-packages', that suggests it should become current.
    (switch-to-buffer buf)))

;;;###autoload
(defalias 'package-list-packages 'list-packages)

;; Used in finder.el
(defun package-show-package-list (&optional packages keywords)
  "Display PACKAGES in a *Packages* buffer.
This is similar to `list-packages', but it does not fetch the
updated list of packages, and it only displays packages with
names in PACKAGES (which should be a list of symbols).

When KEYWORDS are given, only packages with those KEYWORDS are
shown."
  (interactive)
  (require 'finder-inf nil t)
  (let* ((buf (get-buffer-create "*Packages*"))
         (win (get-buffer-window buf)))
    (with-current-buffer buf
      (package-menu-mode)
      (package-menu--generate nil packages keywords))
    (if win
        (select-window win)
      (switch-to-buffer buf))))

(defun package-menu-filter-by-keyword (keyword)
  "Filter the \"*Packages*\" buffer by KEYWORD.
Show only those items that relate to the specified KEYWORD.

KEYWORD can be a string or a list of strings.  If it is a list, a
package will be displayed if it matches any of the keywords.
Interactively, it is a list of strings separated by commas.

KEYWORD can also be used to filter by status or archive name by
using keywords like \"arc:gnu\" and \"status:available\".
Statuses available include \"incompat\", \"available\",
\"built-in\" and \"installed\"."
  (interactive
   (list (completing-read-multiple
          "Keywords (comma separated): " (package-all-keywords))))
  (package--ensure-package-menu-mode)
  (package-show-package-list t (if (stringp keyword)
                                   (list keyword)
                                 keyword)))

(define-obsolete-function-alias
  'package-menu-filter #'package-menu-filter-by-keyword "27.1")

(defun package-menu-filter-by-name (name)
  "Filter the \"*Packages*\" buffer by NAME.
Show only those items whose name matches the regular expression
NAME.  If NAME is nil or the empty string, show all packages."
  (interactive (list (read-from-minibuffer "Filter by name (regexp): ")))
  (package--ensure-package-menu-mode)
  (if (or (not name) (string-empty-p name))
      (package-show-package-list t nil)
    ;; Update `tabulated-list-entries' so that it contains all
    ;; packages before searching.
    (package-menu--refresh t nil)
    (let (matched)
      (dolist (entry tabulated-list-entries)
        (let* ((pkg-name (package-desc-name (car entry))))
          (when (string-match name (symbol-name pkg-name))
            (push pkg-name matched))))
      (if matched
          (package-show-package-list matched nil)
        (user-error "No packages found")))))

(defun package-menu-clear-filter ()
  "Clear any filter currently applied to the \"*Packages*\" buffer."
  (interactive)
  (package--ensure-package-menu-mode)
  (package-menu--generate t t))

(defun package-list-packages-no-fetch ()
  "Display a list of packages.
Does not fetch the updated list of packages before displaying.
The list is displayed in a buffer named `*Packages*'."
  (interactive)
  (list-packages t))

;;;###autoload
(defun package-get-version ()
  "Return the version number of the package in which this is used.
Assumes it is used from an Elisp file placed inside the top-level directory
of an installed ELPA package.
The return value is a string (or nil in case we can't find it)."
  ;; In a sense, this is a lie, but it does just what we want: precompute
  ;; the version at compile time and hardcodes it into the .elc file!
  (declare (pure t))
  ;; Hack alert!
  (let ((file
         (or (if (boundp 'byte-compile-current-file) byte-compile-current-file)
             load-file-name
             buffer-file-name)))
    (cond
     ((null file) nil)
     ;; Packages are normally installed into directories named "<pkg>-<vers>",
     ;; so get the version number from there.
     ((string-match "/[^/]+-\\([0-9]\\(?:[0-9.]\\|pre\\|beta\\|alpha\\|snapshot\\)+\\)/[^/]+\\'" file)
      (match-string 1 file))
     ;; For packages run straight from the an elpa.git clone, there's no
     ;; "-<vers>" in the directory name, so we have to fetch the version
     ;; the hard way.
     (t
      (let* ((pkgdir (file-name-directory file))
             (pkgname (file-name-nondirectory (directory-file-name pkgdir)))
             (mainfile (expand-file-name (concat pkgname ".el") pkgdir)))
        (when (file-readable-p mainfile)
          (require 'lisp-mnt)
          (with-temp-buffer
            (insert-file-contents mainfile)
            (or (lm-header "package-version")
                (lm-header "version")))))))))

;;;; Quickstart: precompute activation actions for faster start up.

;; Activating packages via `package-initialize' is costly: for N installed
;; packages, it needs to read all N <pkg>-pkg.el files first to decide
;; which packages to activate, and then again N <pkg>-autoloads.el files.
;; To speed this up, we precompute a mega-autoloads file which is the
;; concatenation of all those <pkg>-autoloads.el, so we can activate
;; all packages by loading this one file (and hence without initializing
;; package.el).

;; Other than speeding things up, this also offers a bootstrap feature:
;; it lets us activate packages according to `package-load-list' and
;; `package-user-dir' even before those vars are set.

(defcustom package-quickstart nil
  "Precompute activation actions to speed up startup.
This requires the use of `package-quickstart-refresh' every time the
activations need to be changed, such as when `package-load-list' is modified."
  :type 'boolean
  :version "27.1")

(defcustom package-quickstart-file
  (locate-user-emacs-file "package-quickstart.el")
  "Location of the file used to speed up activation of packages at startup."
  :type 'file
  :version "27.1")

(defun package--quickstart-maybe-refresh ()
  (if package-quickstart
      ;; FIXME: Delay refresh in case we're installing/deleting
      ;; several packages!
      (package-quickstart-refresh)
    (delete-file package-quickstart-file)))

(defun package-quickstart-refresh ()
  "(Re)Generate the `package-quickstart-file'."
  (interactive)
  (package-initialize 'no-activate)
  (require 'info)
  (let ((package--quickstart-pkgs ())
        ;; Pretend we haven't activated anything yet!
        (package-activated-list ())
        ;; Make sure we can load this file without load-source-file-function.
        (coding-system-for-write 'emacs-internal)
        (Info-directory-list '("")))
    (dolist (elt package-alist)
      (condition-case err
          (package-activate (car elt))
        ;; Don't let failure of activation of a package arbitrarily stop
        ;; activation of further packages.
        (error (message "%s" (error-message-string err)))))
    (setq package--quickstart-pkgs (nreverse package--quickstart-pkgs))
    (with-temp-file package-quickstart-file
      (emacs-lisp-mode)                 ;For `syntax-ppss'.
      (insert ";;; Quickstart file to activate all packages at startup  -*- lexical-binding:t -*-\n")
      (insert ";; ¡¡ This file is autogenerated by `package-quickstart-refresh', DO NOT EDIT !!\n\n")
      (dolist (pkg package--quickstart-pkgs)
        (let* ((file
                ;; Prefer uncompiled files (and don't accept .so files).
                (let ((load-suffixes '(".el" ".elc")))
                  (locate-library (package--autoloads-file-name pkg))))
               (pfile (prin1-to-string file)))
          (insert "(let ((load-file-name " pfile "))\n")
          (insert-file-contents file)
          ;; Fixup the special #$ reader form and throw away comments.
          (while (re-search-forward "#\\$\\|^;\\(.*\n\\)" nil 'move)
            (unless (nth 8 (syntax-ppss))
              (replace-match (if (match-end 1) "" pfile) t t)))
          (unless (bolp) (insert "\n"))
          (insert ")\n")))
      (pp `(setq package-activated-list
                 (append ',(mapcar #'package-desc-name package--quickstart-pkgs)
                         package-activated-list))
          (current-buffer))
      (let ((info-dirs (butlast Info-directory-list)))
        (when info-dirs
          (pp `(progn (require 'info)
                      (info-initialize)
                      (setq Info-directory-list
                            (append ',info-dirs Info-directory-list)))
              (current-buffer))))
      ;; Use `\s' instead of a space character, so this code chunk is not
      ;; mistaken for an actual file-local section of package.el.
      (insert "\f
;; Local\sVariables:
;; version-control: never
;;\sno-byte-compile: t
;; no-update-autoloads: t
;; End:
"))))

(defun package--imenu-prev-index-position-function ()
  "Move point to previous line in package-menu buffer.
This function is used as a value for
`imenu-prev-index-position-function'."
  (unless (bobp)
    (forward-line -1)))

(defun package--imenu-extract-index-name-function ()
  "Return imenu name for line at point.
This function is used as a value for
`imenu-extract-index-name-function'.  Point should be at the
beginning of the line."
  (let ((package-desc (tabulated-list-get-id)))
    (format "%s (%s): %s"
            (package-desc-name package-desc)
            (package-version-join (package-desc-version package-desc))
            (package-desc-summary package-desc))))

(provide 'package)

;;; package.el ends here

debug log:

solving 19ab0445b9 ...
found 19ab0445b9 in https://yhetil.org/emacs-bugs/CAMRHuGDiLGg-oDwXeOi8nnYovGJpZnzmk-6aSeopeuS+Wnk+HA@mail.gmail.com/
found ecb2573cab in https://git.savannah.gnu.org/cgit/emacs.git
preparing index
index prepared:
100644 ecb2573cab7324dedd0b81af5cd3975b14aeaab5	lisp/emacs-lisp/package.el

applying [1/1] https://yhetil.org/emacs-bugs/CAMRHuGDiLGg-oDwXeOi8nnYovGJpZnzmk-6aSeopeuS+Wnk+HA@mail.gmail.com/
diff --git a/lisp/emacs-lisp/package.el b/lisp/emacs-lisp/package.el
index ecb2573cab..19ab0445b9 100644

Checking patch lisp/emacs-lisp/package.el...
Applied patch lisp/emacs-lisp/package.el cleanly.

index at:
100644 19ab0445b9c6c5ac8e100afc678bdd12f9ff3c12	lisp/emacs-lisp/package.el

(*) Git path names are given by the tree(s) the blob belongs to.
    Blobs themselves have no identifier aside from the hash of its contents.^

Code repositories for project(s) associated with this public inbox

	https://git.savannah.gnu.org/cgit/emacs.git

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).