unofficial mirror of bug-gnu-emacs@gnu.org 
 help / color / mirror / code / Atom feed
blob 9bc1f4dcfdc016a1d7643c6b23c648caca576fe8 121976 bytes (raw)
name: lisp/progmodes/sh-script.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
 
;;; sh-script.el --- shell-script editing commands for Emacs  -*- lexical-binding:t -*-

;; Copyright (C) 1993-1997, 1999, 2001-2023 Free Software Foundation,
;; Inc.

;; Author: Daniel Pfeiffer <occitan@esperanto.org>
;; Old-Version: 2.0f
;; Maintainer: emacs-devel@gnu.org
;; Keywords: languages, unix

;; 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:

;; Major mode for editing shell scripts.  Bourne, C and rc shells as well
;; as various derivatives are supported and easily derived from.  Structured
;; statements can be inserted with one command or abbrev.  Completion is
;; available for filenames, variables known from the script, the shell and
;; the environment as well as commands.

;; A Flymake backend using the "shellcheck" program is provided.  See
;; https://www.shellcheck.net/ for installation instructions.

;;; Known Bugs:

;; - In Bourne the keyword `in' is not anchored to case, for, select ...
;; - Variables in `"' strings aren't fontified because there's no way of
;;   syntactically distinguishing those from `'' strings.

;;		Indentation
;;	 	===========
;; Indentation for rc and es modes is very limited, but for Bourne shells
;; and its derivatives it is quite customizable.
;;
;; The following description applies to sh and derived shells (bash,
;; zsh, ...).
;;
;; There are various customization variables which allow tailoring to
;; a wide variety of styles.  Most of these variables are named
;; sh-indent-for-XXX and sh-indent-after-XXX.  For example.
;; sh-indent-after-if controls the indenting of a line following
;; an if statement, and sh-indent-for-fi controls the indentation
;; of the line containing the fi.
;;
;; You can set each to a numeric value, but it is often more convenient
;; to a symbol such as `+' which uses the value of variable `sh-basic-offset'.
;; By changing this one variable you can increase or decrease how much
;; indentation there is.  Valid symbols:
;;
;; 	+   Indent right by sh-basic-offset
;; 	-   Indent left  by sh-basic-offset
;; 	++  Indent right twice sh-basic-offset
;; 	--  Indent left  twice sh-basic-offset
;; 	*   Indent right half sh-basic-offset
;; 	/   Indent left  half sh-basic-offset.
;;
;; 	Saving indentation values
;; 	-------------------------
;; After you've learned the values in a buffer, how to you remember them?
;; There is a minimal way of being able to save indentation values and
;; to reload them in another buffer or at another point in time.
;;
;; Use `sh-name-style' to give a name to the indentation settings of
;; 	the current buffer.
;; Use `sh-load-style' to load indentation settings for the current
;; 	buffer from a specific style.
;; Use `sh-save-styles-to-buffer' to write all the styles to a buffer
;; 	in lisp code.  You can then store it in a file and later use
;; 	`load-file' to load it.
;;
;; 	Indentation variables - buffer local or global?
;; 	----------------------------------------------
;; I think that often having them buffer-local makes sense,
;; especially if one is using `smie-config-guess'.  However, if
;; a user sets values using customization, these changes won't appear
;; to work if the variables are already local!
;;
;; To get round this, there is a variable `sh-make-vars-local' and 2
;; functions: `sh-make-vars-local' and `sh-reset-indent-vars-to-global-values'.
;;
;; If `sh-make-vars-local' is non-nil, then these variables become
;; buffer local when the mode is established.
;; If this is nil, then the variables are global.  At any time you
;; can make them local with the command `sh-make-vars-local'.
;; Conversely, to update with the global values you can use the
;; command `sh-reset-indent-vars-to-global-values'.
;;
;; This may be awkward, but the intent is to cover all cases.
;;
;; 	Awkward things, pitfalls
;; 	------------------------
;; Indentation for a sh script is complicated for a number of reasons:
;;
;; 1. You can't format by simply looking at symbols, you need to look
;;    at keywords.  [This is not the case for rc and es shells.]
;; 2. The character ")" is used both as a matched pair "(" ... ")" and
;;    as a stand-alone symbol (in a case alternative).  This makes
;;    things quite tricky!
;; 3. Here-documents in a script should be treated "as is", and when
;;    they terminate we want to revert to the indentation of the line
;;    containing the "<<" symbol.
;; 4. A line may be continued using the "\".
;; 5. The character "#" (outside a string) normally starts a comment,
;;    but it doesn't in the sequence "$#"!
;;
;; To try and address points 2 3 and 5 I used a feature that cperl mode
;; uses, that of a text's syntax property.  This, however, has 2
;; disadvantages:
;; 1. We need to scan the buffer to find which ")" symbols belong to a
;;    case alternative, to find any here documents, and handle "$#".
;;
;; 	Bugs
;; 	----
;; - Indenting many lines is slow.  It currently does each line
;;   independently, rather than saving state information.
;;
;; - "echo $z in ps | head)" the last ) is mis-identified as being part of
;;   a case-pattern.  You need to put the "in" between quotes to coerce
;;   sh-script into doing the right thing.
;;
;; Richard Sharman <rsharman@pobox.com>  June 1999.

;;; Code:

;; page 1:	variables and settings
;; page 2:	indentation stuff
;; page 3:	mode-command and utility functions
;; page 4:	statement syntax-commands for various shells
;; page 5:	various other commands

(eval-when-compile
  (require 'skeleton)
  (require 'cl-lib)
  (require 'comint)
  (require 'let-alist)
  (require 'subr-x))
(require 'executable)
(require 'treesit)

(declare-function treesit-parser-create "treesit.c")

(autoload 'comint-completion-at-point "comint")
(autoload 'comint-filename-completion "comint")
(autoload 'comint-send-string "comint")
(autoload 'shell-command-completion "shell")
(autoload 'shell-environment-variable-completion "shell")

(defvar font-lock-comment-face)
(defvar font-lock-set-defaults)
(defvar font-lock-string-face)


(defgroup sh nil
  "Shell programming utilities."
  :group 'languages)

(defgroup sh-script nil
  "Shell script mode."
  :link '(custom-group-link :tag "Font Lock Faces group" font-lock-faces)
  :group 'sh
  :prefix "sh-")


(defcustom sh-ancestor-alist
  '((ash . sh)
    (bash . jsh)
    (bash2 . jsh)
    (dash . ash)
    (dtksh . ksh)
    (es . rc)
    (itcsh . tcsh)
    (jcsh . csh)
    (jsh . sh)
    (ksh . ksh88)
    (ksh88 . jsh)
    (oash . sh)
    (pdksh . ksh88)
    (mksh . pdksh)
    (posix . sh)
    (tcsh . csh)
    (wksh . ksh88)
    (wsh . sh)
    (zsh . ksh88)
    (rpm . sh))
  "Alist showing the direct ancestor of various shells.
This is the basis for `sh-feature'.  See also `sh-alias-alist'.
By default we have the following three hierarchies:

csh		C Shell
  jcsh		C Shell with Job Control
  tcsh		TENEX C Shell
    itcsh	Ian's TENEX C Shell
rc		Plan 9 Shell
  es		Extensible Shell
sh		Bourne Shell
  ash		Almquist Shell
    dash	Debian Almquist Shell
  jsh		Bourne Shell with Job Control
    bash	GNU Bourne Again Shell
    ksh88	Korn Shell '88
      ksh	Korn Shell '93
	dtksh	CDE Desktop Korn Shell
      pdksh	Public Domain Korn Shell
        mksh    MirOS BSD Korn Shell
      wksh	Window Korn Shell
      zsh	Z Shell
  oash		SCO OA (curses) Shell
  posix		IEEE 1003.2 Shell Standard
  wsh		? Shell"
  :type '(repeat (cons symbol symbol))
  :version "24.4"                       ; added dash
  :group 'sh-script)

(defcustom sh-alias-alist
  (append (if (eq system-type 'gnu/linux)
	     '((csh . tcsh)
	       (ksh . pdksh)))
	 ;; for the time being
	 '((ksh . ksh88)
           (bash2 . bash)
	   (sh5 . sh)
           ;; Android's system shell
           ("^/system/bin/sh$" . mksh)))
  "Alist for transforming shell names to what they really are.
Use this where the name of the executable doesn't correspond to
the type of shell it really is.  Keys are regular expressions
matched against the full path of the interpreter.  (For backward
compatibility, keys may also be symbols, which are matched
against the interpreter's basename.  The values are symbols
naming the shell."
  :type '(repeat (cons (radio
                        (regexp :tag "Regular expression")
                        (symbol :tag "Basename"))
                       (symbol :tag "Shell")))
  :group 'sh-script)


(defcustom sh-shell-file
  (or
   ;; On MSDOS and Windows, collapse $SHELL to lower-case and remove
   ;; the executable extension, so comparisons with the list of
   ;; known shells work.
   (and (memq system-type '(ms-dos windows-nt))
	(let* ((shell (getenv "SHELL"))
	       (shell-base
		(and shell (file-name-nondirectory shell))))
	  ;; shell-script mode doesn't support DOS/Windows shells,
	  ;; so use the default instead.
	  (if (or (null shell)
		  (member (downcase shell-base)
			  '("command.com" "cmd.exe" "4dos.com" "ndos.com"
			    "cmdproxy.exe")))
	      "/bin/sh"
	    (file-name-sans-extension (downcase shell)))))
   (getenv "SHELL")
   "/bin/sh")
  "The executable file name for the shell being programmed."
  :type 'string
  :group 'sh-script)


(defcustom sh-shell-arg
  ;; bash does not need any options when run in a shell script,
  '((bash)
    (csh . "-f")
    (pdksh)
    ;; Bill_Mann@praxisint.com says -p with ksh can do harm.
    (ksh88)
    ;; -p means don't initialize functions from the environment.
    (rc . "-p")
    ;; Someone proposed -motif, but we don't want to encourage
    ;; use of a non-free widget set.
    (wksh)
    ;; -f means don't run .zshrc.
    (zsh . "-f"))
  "Single argument string for the magic number.  See `sh-feature'."
  :type '(repeat (cons (symbol :tag "Shell")
		       (choice (const :tag "No Arguments" nil)
			       (string :tag "Arguments")
			       (sexp :format "Evaluate: %v"))))
  :group 'sh-script)

(defcustom sh-imenu-generic-expression
  `((sh
     . ((nil
	 ;; function FOO
	 ;; function FOO()
         "^\\s-*function\\s-+\\([[:alpha:]_][[:alnum:]_]*\\)\\s-*\\(?:()\\)?"
         1)
	;; FOO()
	(nil
	 "^\\s-*\\([[:alpha:]_][[:alnum:]_]*\\)\\s-*()"
	 1)))
    (mksh
     . ((nil
         ;; function FOO
         ;; function FOO()
         ,(rx bol (* (syntax whitespace)) "function" (+ (syntax whitespace))
              (group (1+ (not (any "\0\t\n \"$&'();<=>\\`|#*?[]/"))))
              (* (syntax whitespace)) (? "()"))
         1)
        (nil
         ;; FOO()
         ,(rx bol (* (syntax whitespace))
              (group (1+ (not (any "\0\t\n \"$&'();<=>\\`|#*?[]/"))))
              (* (syntax whitespace)) "()")
         1))))
  "Alist of regular expressions for recognizing shell function definitions.
See `sh-feature' and `imenu-generic-expression'."
  :type '(alist :key-type (symbol :tag "Shell")
		:value-type (alist :key-type (choice :tag "Title"
						     string
						     (const :tag "None" nil))
				   :value-type
				   (repeat :tag "Regexp, index..." sexp)))
  :group 'sh-script
  :version "29.1")

(defun sh-current-defun-name ()
  "Find the name of function or variable at point.
For use in `add-log-current-defun-function'."
  (save-excursion
    (end-of-line)
    (when (re-search-backward
	   (concat "\\(?:"
		   ;; function FOO
		   ;; function FOO()
		   "^\\s-*function\\s-+\\([[:alpha:]_][[:alnum:]_]*\\)\\s-*\\(?:()\\)?"
		   "\\)\\|\\(?:"
		   ;; FOO()
		   "^\\s-*\\([[:alpha:]_][[:alnum:]_]*\\)\\s-*()"
		   "\\)\\|\\(?:"
		   ;; FOO=
		   "^\\([[:alpha:]_][[:alnum:]_]*\\)="
		   "\\)")
	   nil t)
      (or (match-string-no-properties 1)
	  (match-string-no-properties 2)
	  (match-string-no-properties 3)))))

(defvar sh-shell-variables nil
  "Alist of shell variable names that should be included in completion.
These are used for completion in addition to all the variables named
in `process-environment'.  Each element looks like (VAR . VAR), where
the car and cdr are the same symbol.")

(defvar sh-shell-variables-initialized nil
  "Non-nil if `sh-shell-variables' is initialized.")

(defun sh-canonicalize-shell (shell)
  "Convert a shell name SHELL to the one we should handle it as.
SHELL is a full path to the shell interpreter; return a shell
name symbol."
  (cl-loop
     with shell = (cond ((string-match "\\.exe\\'" shell)
                         (substring shell 0 (match-beginning 0)))
                        (t shell))
     with shell-base = (intern (file-name-nondirectory shell))
     for (key . value) in sh-alias-alist
     if (and (stringp key) (string-match key shell)) return value
     if (eq key shell-base) return value
     finally return shell-base))

(defvar sh-shell (sh-canonicalize-shell sh-shell-file)
  "The shell being programmed.  This is set by \\[sh-set-shell].")
;;;###autoload(put 'sh-shell 'safe-local-variable 'symbolp)

(define-abbrev-table 'sh-mode-abbrev-table ())


(defun sh-mode-syntax-table (table &rest list)
  "Copy TABLE and set syntax for successive CHARs according to strings S."
  (setq table (copy-syntax-table table))
  (while list
    (modify-syntax-entry (pop list) (pop list) table))
  table)

(defvar sh-mode-syntax-table
  (sh-mode-syntax-table ()
	?\# "<"
	?\n ">#"
	?\" "\"\""
	?\' "\"'"
	?\` "\"`"
	;; ?$ might also have a ". p" syntax. Both "'" and ". p" seem
	;; to work fine. This is needed so that dabbrev-expand
	;; $VARNAME works.
	?$ "'"
	?! "_"
	?% "_"
	?: "_"
	?. "_"
	?^ "_"
	?~ "_"
	?, "_"
	?= "."
        ?/ "."
	?\; "."
	?| "."
	?& "."
	?< "."
	?> ".")
  "The syntax table to use for Shell-Script mode.
This is buffer-local in every such buffer.")

(defvar sh-mode-syntax-table-input
  `((sh . nil)
    ;; Treat ' as punctuation rather than a string delimiter, as RPM
    ;; files often contain prose with apostrophes.
    (rpm . (,sh-mode-syntax-table ?\' ".")))
  "Syntax-table used in Shell-Script mode.  See `sh-feature'.")

(defvar-keymap sh-mode-map
  :doc "Keymap used in Shell-Script mode."
  "C-c ("    #'sh-function
  "C-c C-w"  #'sh-while
  "C-c C-u"  #'sh-until
  "C-c C-t"  #'sh-tmp-file
  "C-c C-s"  #'sh-select
  "C-c C-r"  #'sh-repeat
  "C-c C-o"  #'sh-while-getopts
  "C-c C-l"  #'sh-indexed-loop
  "C-c C-i"  #'sh-if
  "C-c C-f"  #'sh-for
  "C-c C-c"  #'sh-case
  "C-c ?"    #'smie-config-show-indent
  "C-c ="    #'smie-config-set-indent
  "C-c <"    #'smie-config-set-indent
  "C-c >"    #'smie-config-guess
  "C-c C-\\" #'sh-backslash-region

  "C-c +"    #'sh-add
  "C-M-x"    #'sh-execute-region
  "C-c C-x"  #'executable-interpret
  "C-c C-n"  #'sh-send-line-or-region-and-step
  "C-c C-d"  #'sh-cd-here
  "C-c C-z"  #'sh-show-shell
  "C-c :"    #'sh-set-shell

  "<remap> <delete-backward-char>" #'backward-delete-char-untabify
  "<remap> <backward-sentence>"    #'sh-beginning-of-command
  "<remap> <forward-sentence>"     #'sh-end-of-command)

(easy-menu-define sh-mode-menu sh-mode-map
  "Menu for Shell-Script mode."
  '("Sh-Script"
    ["Backslash region" sh-backslash-region
     :help "Insert, align, or delete end-of-line backslashes on the lines in the region"]
    ["Set shell type..." sh-set-shell
     :help "Set this buffer's shell to SHELL (a string)"]
    ["Execute script..." executable-interpret
     :help "Run script with user-specified args, and collect output in a buffer"]
    ["Execute region" sh-execute-region
     :help "Pass optional header and region to a subshell for noninteractive execution"]
    "---"
    ;; Insert
    ["Case Statement" sh-case
     :help "Insert a case/switch statement"]
    ["For Loop" sh-for
     :help "Insert a for loop"]
    ["If Statement" sh-if
     :help "Insert an if statement"]
    ["Select Statement" sh-select
     :help "Insert a select statement "]
    ["Indexed Loop" sh-indexed-loop
     :help "Insert an indexed loop from 1 to n"]
    ["Options Loop" sh-while-getopts
     :help "Insert a while getopts loop."]
    ["While Loop" sh-while
     :help "Insert a while loop"]
    ["Repeat Loop" sh-repeat
     :help "Insert a repeat loop definition"]
    ["Until Loop" sh-until
     :help "Insert an until loop"]
    ["Addition..." sh-add
     :help "Insert an addition of VAR and prefix DELTA for Bourne (type) shell"]
    ["Function..." sh-function
     :help "Insert a function definition"]
    "---"
    ;; Other
    ["Insert braces and quotes in pairs" electric-pair-mode
     :style toggle
     :selected (bound-and-true-p electric-pair-mode)
     :help "Inserting a brace or quote automatically inserts the matching pair"]
    ["Set indentation" smie-config-set-indent
     :help "Set the indentation for the current line"]
    ["Show indentation" smie-config-show-indent
     :help "Show the how the current line would be indented"]
    ["Learn buffer indentation" smie-config-guess
     :help "Learn how to indent the buffer the way it currently is"]))

(defvar sh-skeleton-pair-default-alist '((?\( _ ?\)) (?\))
				      (?\[ ?\s _ ?\s ?\]) (?\])
				      (?{ _ ?}) (?\}))
  "Value to use for `skeleton-pair-default-alist' in Shell-Script mode.")

(defcustom sh-dynamic-complete-functions
  '(shell-environment-variable-completion
    shell-command-completion
    comint-filename-completion)
  "Functions for doing TAB dynamic completion."
  :type '(repeat function)
  :group 'sh-script)

(defcustom sh-assignment-regexp
  ;; The "\\[.+\\]" matches the "[index]" in "arrayvar[index]=value".
  `((csh . "\\<\\([[:alnum:]_]+\\)\\(\\[.+\\]\\)?[ \t]*[-+*/%^]?=")
    ;; actually spaces are only supported in let/(( ... ))
    (ksh88 . ,(concat "\\<\\([[:alnum:]_]+\\)\\(\\[.+\\]\\)?"
                      "[ \t]*\\(?:[-+*/%&|~^]\\|<<\\|>>\\)?="))
    (bash . "\\<\\([[:alnum:]_]+\\)\\(\\[.+\\]\\)?\\+?=")
    (rc . "\\<\\([[:alnum:]_*]+\\)[ \t]*=")
    (sh . "\\<\\([[:alnum:]_]+\\)="))
  "Regexp for the variable name and what may follow in an assignment.
First grouping matches the variable name.  This is up to and including the `='
sign.  See `sh-feature'."
  :type '(repeat (cons (symbol :tag "Shell")
		       (choice regexp
			       (sexp :format "Evaluate: %v"))))
  :group 'sh-script)

(define-obsolete-variable-alias 'sh-indentation 'sh-basic-offset "26.1")
(put 'sh-indentation 'safe-local-variable 'integerp)

(defcustom sh-remember-variable-min 3
  "Don't remember variables less than this length for completing reads."
  :type 'integer
  :group 'sh-script)


(defvar-local sh-header-marker nil
  "When non-nil is the end of header for prepending by \\[sh-execute-region].
That command is also used for setting this variable.")

(defcustom sh-beginning-of-command
  "\\([;({`|&]\\|\\`\\|[^\\]\n\\)[ \t]*\\([/~[:alnum:]:]\\)"
  "Regexp to determine the beginning of a shell command.
The actual command starts at the beginning of the second \\(grouping\\)."
  :type 'regexp
  :group 'sh-script)


(defcustom sh-end-of-command
  "\\([/~[:alnum:]:]\\)[ \t]*\\([;#)}`|&]\\|$\\)"
  "Regexp to determine the end of a shell command.
The actual command ends at the end of the first \\(grouping\\)."
  :type 'regexp
  :group 'sh-script)



(defcustom sh-here-document-word "EOF"
  "Word to delimit here documents.
If the first character of this string is \"-\", this is taken as
part of the redirection operator, rather than part of the
word (that is, \"<<-\" instead of \"<<\").  This is a feature
used by some shells (for example Bash) to indicate that leading
tabs inside the here document should be ignored.  In this case,
Emacs indents the initial body and end of the here document with
tabs, to the same level as the start (note that apart from this
there is no support for indentation of here documents).  This
will only work correctly if `sh-basic-offset' is a multiple of
`tab-width'.

Any quote characters or leading whitespace in the word are
removed when closing the here document."
  :type 'string
  :group 'sh-script)


(defvar sh-test
  '((sh "[  ]" . 3)
    (ksh88 "[[  ]]" . 4))
  "Initial input in Bourne if, while and until skeletons.  See `sh-feature'.")


;; customized this out of sheer bravado.  not for the faint of heart.
;; but it *did* have an asterisk in the docstring!
(defcustom sh-builtins
  '((bash sh-append posix
	  "." "alias" "bg" "bind" "builtin" "caller" "compgen" "complete"
          "declare" "dirs" "disown" "enable" "fc" "fg" "help" "history"
          "jobs" "kill" "let" "local" "popd" "printf" "pushd" "shopt"
          "source" "suspend" "typeset" "unalias"
          ;; bash4
          "mapfile" "readarray" "coproc")

    ;; The next entry is only used for defining the others
    (bourne sh-append shell
	    "eval" "export" "getopts" "newgrp" "pwd" "read" "readonly"
	    "times" "ulimit")

    (csh sh-append shell
	 "alias" "chdir" "glob" "history" "limit" "nice" "nohup" "rehash"
	 "setenv" "source" "time" "unalias" "unhash")

    (dtksh sh-append wksh)

    (es "access" "apids" "cd" "echo" "eval" "false" "let" "limit" "local"
	"newpgrp" "result" "time" "umask" "var" "vars" "wait" "whatis")

    (jsh sh-append sh
	 "bg" "fg" "jobs" "kill" "stop" "suspend")

    (jcsh sh-append csh
	  "bg" "fg" "jobs" "kill" "notify" "stop" "suspend")

    (ksh88 sh-append bourne
	   "alias" "bg" "false" "fc" "fg" "jobs" "kill" "let" "print" "time"
	   "typeset" "unalias" "whence")

    (oash sh-append sh
	  "checkwin" "dateline" "error" "form" "menu" "newwin" "oadeinit"
	  "oaed" "oahelp" "oainit" "pp" "ppfile" "scan" "scrollok" "wattr"
	  "wclear" "werase" "win" "wmclose" "wmmessage" "wmopen" "wmove"
	  "wmtitle" "wrefresh")

    (pdksh sh-append ksh88
	   "bind")

    (posix sh-append sh
	   "command")

    (rc "builtin" "cd" "echo" "eval" "limit" "newpgrp" "shift" "umask" "wait"
	"whatis")

    (sh sh-append bourne
	"hash" "test" "type")

    ;; The next entry is only used for defining the others
    (shell "cd" "echo" "eval" "set" "shift" "umask" "unset" "wait")

    (wksh sh-append ksh88)

    (zsh sh-append ksh88
	 "autoload" "always"
         "bindkey" "builtin" "chdir" "compctl" "declare" "dirs"
	 "disable" "disown" "echotc" "enable" "functions" "getln" "hash"
	 "history" "integer" "limit" "local" "log" "popd" "pushd" "r"
	 "readonly" "rehash" "sched" "setopt" "source" "suspend" "true"
	 "ttyctl" "type" "unfunction" "unhash" "unlimit" "unsetopt" "vared"
	 "which"))
  "List of all shell builtins for completing read and fontification.
Note that on some systems not all builtins are available or some are
implemented as aliases.  See `sh-feature'."
  :type '(repeat (cons (symbol :tag "Shell")
		       (choice (repeat string)
			       (sexp :format "Evaluate: %v"))))
  :version "24.4"                       ; bash4 additions
  :group 'sh-script)

(defcustom sh-indent-statement-after-and t
  "How to indent statements following && in Shell-Script mode.
If t, indent to align with &&.
If nil, indent to align with the previous line's indentation."
  :type 'boolean
  :version "29.1")

(defcustom sh-leading-keywords
  '((bash sh-append sh
          "time")

    (csh "else")

    (es "true" "unwind-protect" "whatis")

    (rc "else")

    (sh "!" "do" "elif" "else" "if" "then" "trap" "type" "until" "while"))
  "List of keywords that may be immediately followed by a builtin or keyword.
Given some confusion between keywords and builtins depending on shell and
system, the distinction here has been based on whether they influence the
flow of control or syntax.  See `sh-feature'."
  :type '(repeat (cons (symbol :tag "Shell")
		       (choice (repeat string)
			       (sexp :format "Evaluate: %v"))))
  :group 'sh-script)


(defcustom sh-other-keywords
  '((bash sh-append bourne
	  "bye" "logout" "select")

    ;; The next entry is only used for defining the others
    (bourne sh-append sh
	    "function")

    (csh sh-append shell
	 "breaksw" "default" "end" "endif" "endsw" "foreach" "goto"
	 "if" "logout" "onintr" "repeat" "switch" "then" "while")

    (es "break" "catch" "exec" "exit" "fn" "for" "forever" "fork" "if"
	"return" "throw" "while")

    (ksh88 sh-append bourne
	   "select")

    (rc "break" "case" "exec" "exit" "fn" "for" "if" "in" "return" "switch"
	"while")

    (sh sh-append shell
	"done" "esac" "fi" "for" "in" "return")

    ;; The next entry is only used for defining the others
    (shell "break" "case" "continue" "exec" "exit")

    (zsh sh-append bash
	 "select" "foreach"))
  "List of keywords not in `sh-leading-keywords'.
See `sh-feature'."
  :type '(repeat (cons (symbol :tag "Shell")
		       (choice (repeat string)
			       (sexp :format "Evaluate: %v"))))
  :group 'sh-script)



(defvar sh-variables
  '((bash sh-append sh
	  "allow_null_glob_expansion" "auto_resume" "BASH" "BASH_ENV"
	  "BASH_VERSINFO" "BASH_VERSION" "cdable_vars" "COMP_CWORD"
	  "COMP_LINE" "COMP_POINT" "COMP_WORDS" "COMPREPLY" "DIRSTACK"
	  "ENV" "EUID" "FCEDIT" "FIGNORE" "FUNCNAME"
	  "glob_dot_filenames" "GLOBIGNORE" "GROUPS" "histchars"
	  "HISTCMD" "HISTCONTROL" "HISTFILE" "HISTFILESIZE"
	  "HISTIGNORE" "history_control" "HISTSIZE"
	  "hostname_completion_file" "HOSTFILE" "HOSTTYPE" "IGNOREEOF"
	  "ignoreeof" "INPUTRC" "LINENO" "MACHTYPE" "MAIL_WARNING"
	  "noclobber" "nolinks" "notify" "no_exit_on_failed_exec"
	  "NO_PROMPT_VARS" "OLDPWD" "OPTERR" "OSTYPE" "PIPESTATUS"
	  "PPID" "POSIXLY_CORRECT" "PROMPT_COMMAND" "PS3" "PS4"
	  "pushd_silent" "PWD" "RANDOM" "REPLY" "SECONDS" "SHELLOPTS"
	  "SHLVL" "TIMEFORMAT" "TMOUT" "UID")

    (csh sh-append shell
	 "argv" "cdpath" "child" "echo" "histchars" "history" "home"
	 "ignoreeof" "mail" "noclobber" "noglob" "nonomatch" "path" "prompt"
	 "shell" "status" "time" "verbose")

    (es sh-append shell
	"apid" "cdpath" "CDPATH" "history" "home" "ifs" "noexport" "path"
	"pid" "prompt" "signals")

    (jcsh sh-append csh
	  "notify")

    (ksh88 sh-append sh
	   "ENV" "ERRNO" "FCEDIT" "FPATH" "HISTFILE" "HISTSIZE" "LINENO"
	   "OLDPWD" "PPID" "PS3" "PS4" "PWD" "RANDOM" "REPLY" "SECONDS"
	   "TMOUT")

    (oash sh-append sh
	  "FIELD" "FIELD_MAX" "LAST_KEY" "OALIB" "PP_ITEM" "PP_NUM")

    (rc sh-append shell
	"apid" "apids" "cdpath" "CDPATH" "history" "home" "ifs" "path" "pid"
	"prompt" "status")

    (sh sh-append shell
	"CDPATH" "IFS" "OPTARG" "OPTIND" "PS1" "PS2")

    ;; The next entry is only used for defining the others
    (shell "COLUMNS" "EDITOR" "HOME" "HUSHLOGIN" "LANG" "LC_COLLATE"
	   "LC_CTYPE" "LC_MESSAGES" "LC_MONETARY" "LC_NUMERIC" "LC_TIME"
	   "LINES" "LOGNAME" "MAIL" "MAILCHECK" "MAILPATH" "PAGER" "PATH"
	   "SHELL" "TERM" "TERMCAP" "TERMINFO" "VISUAL")

    (tcsh sh-append csh
	  "addsuffix" "ampm" "autocorrect" "autoexpand" "autolist"
	  "autologout" "chase_symlinks" "correct" "dextract" "edit" "el"
	  "fignore" "gid" "histlit" "HOST" "HOSTTYPE" "HPATH"
	  "ignore_symlinks" "listjobs" "listlinks" "listmax" "matchbeep"
	  "nobeep" "NOREBIND" "oid" "printexitvalue" "prompt2" "prompt3"
	  "pushdsilent" "pushdtohome" "recexact" "recognize_only_executables"
	  "rmstar" "savehist" "SHLVL" "showdots" "sl" "SYSTYPE" "tcsh" "term"
	  "tperiod" "tty" "uid" "version" "visiblebell" "watch" "who"
	  "wordchars")

    (zsh sh-append ksh88
	 "BAUD" "bindcmds" "cdpath" "DIRSTACKSIZE" "fignore" "FIGNORE" "fpath"
	 "HISTCHARS" "hostcmds" "hosts" "HOSTS" "LISTMAX" "LITHISTSIZE"
	 "LOGCHECK" "mailpath" "manpath" "NULLCMD" "optcmds" "path" "POSTEDIT"
	 "prompt" "PROMPT" "PROMPT2" "PROMPT3" "PROMPT4" "psvar" "PSVAR"
	 "READNULLCMD" "REPORTTIME" "RPROMPT" "RPS1" "SAVEHIST" "SPROMPT"
	 "STTY" "TIMEFMT" "TMOUT" "TMPPREFIX" "varcmds" "watch" "WATCH"
	 "WATCHFMT" "WORDCHARS" "ZDOTDIR"))
  "List of all shell variables available for completing read.
See `sh-feature'.")

\f
;; Font-Lock support

(defface sh-heredoc
  '((((min-colors 88) (class color)
      (background dark))
     (:foreground "yellow1" :weight bold))
    (((class color)
      (background dark))
     (:foreground "yellow" :weight bold))
    (((class color)
      (background light))
     (:foreground "tan1" ))
    (t
     (:weight bold)))
  "Face to show a here-document."
  :group 'sh-indentation)

;; These colors are probably icky.  It's just a placeholder though.
(defface sh-quoted-exec
  '((((class color) (background dark))
     (:foreground "salmon"))
    (((class color) (background light))
     (:foreground "magenta"))
    (t
     (:weight bold)))
  "Face to show quoted execs like \\=`blabla\\=`."
  :group 'sh-indentation)

(defface sh-escaped-newline '((t :inherit font-lock-string-face))
  "Face used for (non-escaped) backslash at end of a line in Shell-script mode."
  :group 'sh-script
  :version "22.1")

(defvar sh-font-lock-keywords-var
  '((csh sh-append shell
	 ("\\${?[#?]?\\([[:alpha:]_][[:alnum:]_]*\\|0\\)" 1
          font-lock-variable-name-face))

    (es sh-append executable-font-lock-keywords
	("\\$#?\\([[:alpha:]_][[:alnum:]_]*\\|[0-9]+\\)" 1
         font-lock-variable-name-face))

    (rc sh-append es)
    (bash sh-append sh ("\\$(\\([^)\n]+\\)" (1 'sh-quoted-exec t) ))
    (sh sh-append shell
	;; Variable names.
	("\\$\\({#?\\)?\\([[:alpha:]_][[:alnum:]_]*\\|[-#?@!]\\)" 2
	  font-lock-variable-name-face)
	;; Function names.
	("^\\(\\sw+\\)[ \t]*(" 1 font-lock-function-name-face)
	("\\<\\(function\\)\\>[ \t]*\\(\\sw+\\)?"
	  (1 font-lock-keyword-face) (2 font-lock-function-name-face nil t))
	("\\(?:^\\s *\\|[[();&|]\\s *\\|\\(?:\\s +-[ao]\\|if\\|else\\|then\\|while\\|do\\)\\s +\\)\\(!\\)"
	 1 font-lock-negation-char-face))

    ;; The next entry is only used for defining the others
    (shell
           ;; Using font-lock-string-face here confuses sh-get-indent-info.
           ("\\(^\\|[^\\]\\)\\(\\\\\\\\\\)*\\(\\\\\\)$" 3 'sh-escaped-newline)
	   ("\\\\[^[:alnum:]]" 0 font-lock-string-face)
	   ("\\${?\\([[:alpha:]_][[:alnum:]_]*\\|[0-9]+\\|[$*_]\\)" 1
	     font-lock-variable-name-face))
    (rpm sh-append rpm2
	 ("%{?\\(\\sw+\\)"  1 font-lock-keyword-face))
    (rpm2 sh-append shell
	  ("^Summary:\\(.*\\)$" (1 font-lock-doc-face t))
	  ("^\\(\\sw+\\):"  1 font-lock-variable-name-face)))
  "Default expressions to highlight in Shell Script modes.  See `sh-feature'.")

(defvar sh-font-lock-keywords-var-1
  '((sh "[ \t]in\\>"))
  "Subdued level highlighting for Shell Script modes.")

(defvar sh-font-lock-keywords-var-2 ()
  "Gaudy level highlighting for Shell Script modes.")

;; These are used for the syntax table stuff (derived from cperl-mode).
;; Note: parse-sexp-lookup-properties must be set to t for it to work.
(defconst sh-st-punc (string-to-syntax "."))
(defconst sh-here-doc-syntax (string-to-syntax "|")) ;; generic string

(eval-and-compile
  (defconst sh-escaped-line-re
    ;; Should match until the real end-of-continued-line, but if that is not
    ;; possible (because we bump into EOB or the search bound), then we should
    ;; match until the search bound.
    "\\(?:\\(?:.*[^\\\n]\\)?\\(?:\\\\\\\\\\)*\\\\\n\\)*.*")

  (defconst sh-here-doc-open-re
    (concat "[^<]<<-?\\s-*\\\\?\\(\\(?:['\"][^'\"]+['\"]\\|\\sw\\|[-/~._@]\\)+\\)"
            sh-escaped-line-re "\\(\n\\)")))

(defun sh--inside-noncommand-expression (pos)
  (save-excursion
    (let ((ppss (syntax-ppss pos)))
      (when (nth 1 ppss)
        (goto-char (nth 1 ppss))
        (or
         (pcase (char-after)
           ;; ((...)) or $((...)) or $[...] or ${...}. Nested
           ;; parenthesis can occur inside the first of these forms, so
           ;; parse backward recursively.
           (?\( (eq ?\( (char-before)))
           ((or ?\{ ?\[) (eq ?\$ (char-before))))
         (sh--inside-noncommand-expression (1- (point))))))))

(defun sh-font-lock-open-heredoc (start string eol)
  "Determine the syntax of the \\n after a <<EOF.
START is the position of <<.
STRING is the actual word used as delimiter (e.g. \"EOF\").
INDENTED is non-nil if the here document's content (and the EOF mark) can
be indented (i.e. a <<- was used rather than just <<).
Point is at the beginning of the next line."
  (unless (or (memq (char-before start) '(?< ?>))
	      (sh-in-comment-or-string start)
              (sh--inside-noncommand-expression start))
    ;; We're looking at <<STRING, so we add "^STRING$" to the syntactic
    ;; font-lock keywords to detect the end of this here document.
    (let ((str (replace-regexp-in-string "['\"]" "" string))
          (ppss (save-excursion (syntax-ppss eol))))
      (if (nth 4 ppss)
          ;; The \n not only starts the heredoc but also closes a comment.
          ;; Let's close the comment just before the \n.
          (put-text-property (1- eol) eol 'syntax-table '(12))) ;">"
      (if (or (nth 5 ppss) (> (count-lines start eol) 1))
          ;; If the sh-escaped-line-re part of sh-here-doc-open-re has matched
          ;; several lines, make sure we refontify them together.
          ;; Furthermore, if (nth 5 ppss) is non-nil (i.e. the \n is
          ;; escaped), it means the right \n is actually further down.
          ;; Don't bother fixing it now, but place a multiline property so
          ;; that when jit-lock-context-* refontifies the rest of the
          ;; buffer, it also refontifies the current line with it.
          (put-text-property start (1+ eol) 'syntax-multiline t))
      (put-text-property eol (1+ eol) 'sh-here-doc-marker str)
      (prog1 sh-here-doc-syntax
        (goto-char (+ 2 start))))))

(defun sh-syntax-propertize-here-doc (end)
  (let ((ppss (syntax-ppss)))
    (when (eq t (nth 3 ppss))
      (let ((key (get-text-property (nth 8 ppss) 'sh-here-doc-marker))
            (case-fold-search nil))
        (when (re-search-forward
               (concat "^\\([ \t]*\\)" (regexp-quote key) "\\(\n\\)")
               end 'move)
          (let ((eol (match-beginning 2)))
            (put-text-property eol (1+ eol)
                               'syntax-table sh-here-doc-syntax)))))))

(defun sh-font-lock-quoted-subshell (limit)
  "Search for a subshell embedded in a string.
Find all the unescaped \" characters within said subshell, remembering that
subshells can nest."
  (when (eq ?\" (nth 3 (syntax-ppss))) ; Check we matched an opening quote.
    ;; bingo we have a $( or a ` inside a ""
    (let (;; `state' can be: double-quote, backquote, code.
          (state (if (eq (char-before) ?`) 'backquote 'code))
          (startpos (point))
          ;; Stacked states in the context.
          (states '(double-quote)))
      (while (and state (progn (skip-chars-forward "^'\\\\\"`$()" limit)
                               (< (point) limit)))
        ;; unescape " inside a $( ... ) construct.
        (pcase (char-after)
          (?\' (pcase state
                 ('double-quote nil)
                 (_ (forward-char 1)
                    ;; FIXME: mark skipped double quotes as punctuation syntax.
                    (let ((spos (point)))
                      (skip-chars-forward "^'" limit)
                      (save-excursion
                        (let ((epos (point)))
                          (goto-char spos)
                          (while (search-forward "\"" epos t)
                            (put-text-property (point) (1- (point))
                                            'syntax-table '(1)))))))))
          (?\\ (forward-char 1))
          (?\" (pcase state
                 ('double-quote (setq state (pop states)))
                 (_ (push state states) (setq state 'double-quote)))
               (if state (put-text-property (point) (1+ (point))
                                            'syntax-table '(1))))
          (?\` (pcase state
                 ('backquote (setq state (pop states)))
                 (_ (push state states) (setq state 'backquote))))
          (?\$ (if (not (eq (char-after (1+ (point))) ?\())
                   nil
                 (forward-char 1)
                 (pcase state
                   (_ (push state states) (setq state 'code)))))
          (?\( (pcase state
                 ('double-quote nil)
                 (_ (push state states) (setq state 'code))))
          (?\) (pcase state
                 ('double-quote nil)
                 (_ (setq state (pop states)))))
          (_ (error "Internal error in sh-font-lock-quoted-subshell")))
        (forward-char 1))
      (when (< startpos (line-beginning-position))
        (put-text-property startpos (point) 'syntax-multiline t)
        (add-hook 'syntax-propertize-extend-region-functions
                  #'syntax-propertize-multiline nil t))
      )))


(defun sh-is-quoted-p (pos)
  (and (eq (char-before pos) ?\\)
       (not (sh-is-quoted-p (1- pos)))))

(defun sh-font-lock-paren (start)
  (unless (nth 8 (syntax-ppss))
    (save-excursion
      (let ((open nil))
        (goto-char start)
        ;; Skip through all patterns
        (while
            (progn
              (while
                  (progn
                    (forward-comment (- (point-max)))
                    (when (and (eolp) (sh-is-quoted-p (point)))
                      (forward-char -1)
                      t)))
              ;; Skip through one pattern
              (while
                  (or (/= 0 (skip-syntax-backward "w_"))
                      (/= 0 (skip-chars-backward "-$=?[]*@/\\\\"))
                      (and (sh-is-quoted-p (1- (point)))
                           (goto-char (- (point) 2)))
                      (when (memq (char-before) '(?\" ?\' ?\}))
                        (condition-case nil (progn (backward-sexp 1) t)
                          (error nil)))))
              ;; Patterns can be preceded by an open-paren (bug#1320).
              (when (eq (char-before (point)) ?\()
                (backward-char 1)
                (setq open (point)))
              (while (progn
                       (forward-comment (- (point-max)))
                       ;; Maybe we've bumped into an escaped newline.
                       (sh-is-quoted-p (point)))
                (backward-char 1))
              (when (eq (char-before) ?|)
                (backward-char 1) t)))
        (and (> (point) (1+ (point-min)))
             (progn (backward-char 2)
                    (if (> start (line-end-position))
                        (put-text-property (point) (1+ start)
                                           'syntax-multiline t))
                    ;; FIXME: The `in' may just be a random argument to
                    ;; a normal command rather than the real `in' keyword.
                    ;; I.e. we should look back to try and find the
                    ;; corresponding `case'.
                    (and (looking-at ";[;&]\\|\\_<in")
                         ;; ";; esac )" is a case that looks
                         ;; like a case-pattern but it's really just a close
                         ;; paren after a case statement.  I.e. if we skipped
                         ;; over `esac' just now, we're not looking
                         ;; at a case-pattern.
                         (not (looking-at "..[ \t\n]+esac[^[:word:]_]"))))
             (progn
               (when open
                 (put-text-property open (1+ open) 'syntax-table sh-st-punc))
               sh-st-punc))))))

(defun sh-font-lock-backslash-quote ()
  (if (eq (save-excursion (nth 3 (syntax-ppss (match-beginning 0)))) ?\')
      ;; In a '...' the backslash is not escaping.
      sh-st-punc
    nil))

(defun sh-syntax-propertize-function (start end)
  (goto-char start)
  (sh-syntax-propertize-here-doc end)
  (funcall
   (syntax-propertize-rules
    (sh-here-doc-open-re
     (2 (sh-font-lock-open-heredoc
         (1+ (match-beginning 0)) (match-string 1) (match-beginning 2))))
    ("\\s|" (0 (prog1 nil (sh-syntax-propertize-here-doc end))))
    ;; A `#' begins a comment when it is unquoted and at the
    ;; beginning of a word.  In the shell, words are separated by
    ;; metacharacters.  The list of special chars is taken from
    ;; the single-unix spec of the shell command language (under
    ;; `quoting') but with `$' removed.  Also -- if there's something like
    ;; \ #foo, then that's not a comment, unless the backslash itself
    ;; is backslashed.
    ("\\(?:[^|&;<>(`\\\"' \t\n]\\|\\${\\|\\(?:[^\\]\\|^\\)\\\\\\(?:\\\\\\\\\\)*.\\)\\(#+\\)" (1 "_"))
    ;; In addition, `#' at the beginning of closed parentheses
    ;; does not start a comment if the parentheses are not isolated
    ;; by metacharacters, excluding [()].
    ;; (e.g. `foo(#q/)' and `(#b)foo' in zsh)
    ("[^|&;<>(`\\\"' \t\n](\\(#+\\)" (1 "_"))
    ("(\\(#\\)[^)]+?)[^|&;<>)`\\\"' \t\n]" (1 "_"))
    ;; In a '...' the backslash is not escaping.
    ("\\(\\\\\\)'" (1 (sh-font-lock-backslash-quote)))
    ;; Make sure $@ and $? are correctly recognized as sexps.
    ("\\$\\([?@]\\)" (1 "_"))
    ;; Distinguish the special close-paren in `case'.
    (")" (0 (sh-font-lock-paren (match-beginning 0))))
    ;; Highlight (possibly nested) subshells inside "" quoted
    ;; regions correctly.
    ("\"\\(?:[^\\\"]\\|\\\\.\\)*?\\(\\$(\\|`\\)"
     (1 (ignore
         (if (nth 8 (save-excursion (syntax-ppss (match-beginning 0))))
             (goto-char (1+ (match-beginning 0)))
           ;; Save excursion because we want to also apply other
           ;; syntax-propertize rules within the affected region.
           (save-excursion
             (sh-font-lock-quoted-subshell end)))))))
   (point) end))
(defun sh-font-lock-syntactic-face-function (state)
  (let ((q (nth 3 state)))
    (if q
        (if (characterp q)
            (if (eq q ?\`) 'sh-quoted-exec font-lock-string-face)
          'sh-heredoc)
      font-lock-comment-face)))

(defgroup sh-indentation nil
  "Variables controlling indentation in shell scripts.

Note: customizing these variables will not affect existing buffers if
`sh-make-vars-local' is non-nil.  See the documentation for
variable `sh-make-vars-local', command `sh-make-vars-local'
and command `sh-reset-indent-vars-to-global-values'."
  :group 'sh-script)


(defcustom sh-set-shell-hook nil
  "Hook run by `sh-set-shell'."
  :type 'hook
  :group 'sh-script)

(defcustom sh-mode-hook '(sh-electric-here-document-mode)
  "Hook run by `sh-mode'."
  :type 'hook
  :options '(sh-electric-here-document-mode)
  :group 'sh-script)

(defcustom sh-popup-occur-buffer nil
  "Controls when  `smie-config-guess' pops the `*indent*' buffer.
If t it is always shown.  If nil, it is shown only when there
are conflicts."
  :type '(choice
	  (const :tag "Only when there are conflicts." nil)
	  (const :tag "Always"  t))
  :group 'sh-indentation)

(defcustom sh-first-lines-indent 0
  "The indentation of the first non-blank non-comment line.
Usually 0 meaning first column.
Can be set to a number, or to nil which means leave it as is."
  :type '(choice
	  (const :tag "Leave as is"	nil)
	  (integer :tag "Column number"
		   :menu-tag "Indent to this col (0 means first col)" ))
  :group 'sh-indentation)


(defcustom sh-basic-offset 4
  "The default indentation increment.
This value is used for the `+' and `-' symbols in an indentation variable."
  :type 'integer
  :safe #'integerp
  :group 'sh-indentation)

(defcustom sh-indent-comment t
  "How a comment line is to be indented.
nil means leave it as it is;
t  means indent it as a normal line, aligning it to previous non-blank
   non-comment line;
a number means align to that column, e.g. 0 means first column."
  :type '(choice
	  (const :tag "Leave as is." nil)
	  (const :tag "Indent as a normal line."  t)
	  (integer :menu-tag "Indent to this col (0 means first col)."
		   :tag "Indent to column number.") )
  :version "24.3"
  :group 'sh-indentation)


(defvar sh-debug nil
  "Enable lots of debug messages - if function `sh-debug' is enabled.")


;; Uncomment this defun and comment the defmacro for debugging.
;; (defun sh-debug (&rest args)
;;   "For debugging:  display message ARGS if variable SH-DEBUG is non-nil."
;;   (if sh-debug
;;       (apply 'message args)))
(defmacro sh-debug (&rest _args))

(defconst sh-symbol-list
  '((const :tag "+ "  :value +
	   :menu-tag "+   Indent right by sh-basic-offset")
    (const :tag "- "  :value -
	   :menu-tag "-   Indent left  by sh-basic-offset")
    (const :tag "++"  :value  ++
	   :menu-tag "++  Indent right twice sh-basic-offset")
    (const :tag "--"  :value --
	   :menu-tag "--  Indent left  twice sh-basic-offset")
    (const :tag "* " :value *
	   :menu-tag "*   Indent right half sh-basic-offset")
    (const :tag "/ " :value /
	   :menu-tag "/   Indent left  half sh-basic-offset")))

(defcustom sh-indent-for-else 0
  "How much to indent an `else' relative to its `if'.  Usually 0."
  :type `(choice
	  (integer :menu-tag "A number (positive=>indent right)"
		   :tag "A number")
	  (const :tag "--") ;; separator!
	  ,@ sh-symbol-list
	  )
  :group 'sh-indentation)

(defconst sh-number-or-symbol-list
  (append '((integer :menu-tag "A number (positive=>indent right)"
		     :tag "A number")
	    (const :tag "--"))		; separator
	  sh-symbol-list))

(defcustom sh-indent-for-fi 0
  "How much to indent a `fi' relative to its `if'.  Usually 0."
  :type `(choice ,@ sh-number-or-symbol-list )
  :group 'sh-indentation)

(defcustom sh-indent-for-done 0
  "How much to indent a `done' relative to its matching stmt.  Usually 0."
  :type `(choice ,@ sh-number-or-symbol-list )
  :group 'sh-indentation)

(defcustom sh-indent-after-else '+
  "How much to indent a statement after an `else' statement."
  :type `(choice ,@ sh-number-or-symbol-list )
  :group 'sh-indentation)

(defcustom sh-indent-after-if '+
  "How much to indent a statement after an `if' statement.
This includes lines after `else' and `elif' statements, too, but
does not affect the `else', `elif' or `fi' statements themselves."
  :type `(choice ,@ sh-number-or-symbol-list )
  :group 'sh-indentation)

(defcustom sh-indent-for-then 0
  "How much to indent a `then' relative to its `if'."
  :type `(choice ,@ sh-number-or-symbol-list )
  :group 'sh-indentation)

(defcustom sh-indent-for-do 0
  "How much to indent a `do' statement.
This is relative to the statement before the `do', typically a
`while', `until', `for', `repeat' or `select' statement."
  :type `(choice ,@ sh-number-or-symbol-list)
  :group 'sh-indentation)

(defcustom sh-indent-after-do '+
  "How much to indent a line after a `do' statement.
This is used when the `do' is the first word of the line.
This is relative to the statement before the `do', typically a
`while', `until', `for', `repeat' or `select' statement."
  :type `(choice ,@ sh-number-or-symbol-list)
  :group 'sh-indentation)

(defcustom sh-indent-after-loop-construct '+
  "How much to indent a statement after a loop construct.

This variable is used when the keyword `do' is on the same line as the
loop statement (e.g., `until', `while' or `for').
If the `do' is on a line by itself, then `sh-indent-after-do' is used instead."
  :type `(choice ,@ sh-number-or-symbol-list)
  :group 'sh-indentation)


(defcustom sh-indent-after-done 0
  "How much to indent a statement after a `done' keyword.
Normally this is 0, which aligns the `done' to the matching
looping construct line.
Setting it non-zero allows you to have the `do' statement on a line
by itself and align the done under to do."
  :type `(choice ,@ sh-number-or-symbol-list)
  :group 'sh-indentation)

(defcustom sh-indent-for-case-label '+
  "How much to indent a case label statement.
This is relative to the line containing the `case' statement."
  :type `(choice ,@ sh-number-or-symbol-list)
  :group 'sh-indentation)

(defcustom sh-indent-for-case-alt '++
  "How much to indent statements after the case label.
This is relative to the line containing the `case' statement."
  :type `(choice ,@ sh-number-or-symbol-list)
  :group 'sh-indentation)


(defcustom sh-indent-for-continuation '+
  "How much to indent for a continuation statement."
  :type `(choice ,@ sh-number-or-symbol-list)
  :group 'sh-indentation)

(defcustom sh-indent-after-open '+
  "How much to indent after a line with an opening parenthesis or brace.
For an open paren after a function, `sh-indent-after-function' is used."
  :type `(choice ,@ sh-number-or-symbol-list)
  :group 'sh-indentation)

(defcustom sh-indent-after-function '+
  "How much to indent after a function line."
  :type `(choice ,@ sh-number-or-symbol-list)
  :group 'sh-indentation)

;; These 2 are for the rc shell:

(defcustom sh-indent-after-switch '+
  "How much to indent a `case' statement relative to the `switch' statement.
This is for the rc shell."
  :type `(choice ,@ sh-number-or-symbol-list)
  :group 'sh-indentation)

(defcustom sh-indent-after-case '+
  "How much to indent a statement relative to the `case' statement.
This is for the rc shell."
  :type `(choice ,@ sh-number-or-symbol-list)
  :group 'sh-indentation)

(defcustom sh-backslash-column 48
  "Column in which `sh-backslash-region' inserts backslashes."
  :type 'integer
  :group 'sh)

(defcustom sh-backslash-align t
  "If non-nil, `sh-backslash-region' will align backslashes."
  :type 'boolean
  :group 'sh)

;; Internal use - not designed to be changed by the user:

(defun sh-mkword-regexpr (word)
  "Make a regexp which matches WORD as a word.
This specifically excludes an occurrence of WORD followed by
punctuation characters like `-'."
  (concat word "\\([^-[:alnum:]_]\\|$\\)"))

(defconst sh-re-done (sh-mkword-regexpr "done"))


(defconst sh-kws-for-done
  '((sh .  ( "while" "until" "for" ) )
    (bash . ( "while" "until" "for" "select"  ) )
    (ksh88 . ( "while" "until" "for" "select"  ) )
    (zsh .  ( "while" "until" "for" "repeat" "select" ) ) )
  "Which keywords can match the word `done' in this shell.")


(defconst sh-indent-supported
  '((sh . sh)
    (csh . nil)
    (rc . rc))
  "Indentation rule set to use for each shell type.")

(defvar sh-indent-supported-here nil
  "Non-nil if we support indentation for the current buffer's shell type.")

(defconst sh-var-list
  '(
    sh-basic-offset sh-first-lines-indent sh-indent-after-case
    sh-indent-after-do sh-indent-after-done
    sh-indent-after-else
    sh-indent-after-if
    sh-indent-after-loop-construct
    sh-indent-after-open
    sh-indent-comment
    sh-indent-for-case-alt
    sh-indent-for-case-label
    sh-indent-for-continuation
    sh-indent-for-do
    sh-indent-for-done
    sh-indent-for-else
    sh-indent-for-fi
    sh-indent-for-then
    )
  "A list of variables used by script mode to control indentation.
This list is used when switching between buffer-local and global
values of variables, and for the commands using indentation styles.")

(defvar sh-make-vars-local t
  "Controls whether indentation variables are local to the buffer.
If non-nil, indentation variables are made local initially.
If nil, you can later make the variables local by invoking
command `sh-make-vars-local'.
The default is t because I assume that in one Emacs session one is
frequently editing existing scripts with different styles.")

\f
;; inferior shell interaction
;; TODO: support multiple interactive shells
(defvar-local sh-shell-process nil
  "The inferior shell process for interaction.")

(defvar explicit-shell-file-name)

(defun sh-shell-process (force)
  "Get a shell process for interaction.
If FORCE is non-nil and no process found, create one."
  (if (process-live-p sh-shell-process)
      sh-shell-process
    (setq sh-shell-process
          (let ((found nil) proc
                (procs (process-list)))
            (while (and (not found) procs
                        (process-live-p (setq proc (pop procs)))
                        (process-command proc))
              (when (string-equal sh-shell (file-name-nondirectory
                                            (car (process-command proc))))
                (setq found proc)))
            (or found
                (and force
                     (get-buffer-process
                      (let ((explicit-shell-file-name sh-shell-file)
                            (display-buffer-overriding-action
                             '(nil . ((inhibit-same-window . t)))))
                        ;; We must prevent this `(shell)' call from
                        ;; switching buffers, so that the variable
                        ;; `sh-shell-process' is set locally in the
                        ;; correct buffer.
                        (save-current-buffer
                          (shell))))))))))

(defun sh-show-shell ()
  "Pop the shell interaction buffer."
  (interactive)
  (pop-to-buffer (process-buffer (sh-shell-process t)) display-comint-buffer-action))

(defun sh-send-text (text)
  "Send TEXT to `sh-shell-process'."
  (comint-send-string (sh-shell-process t) (concat text "\n")))

(defun sh-cd-here ()
  "Change directory in the current interaction shell to the current one."
  (interactive)
  (sh-send-text (concat "cd " default-directory)))

(defun sh-send-line-or-region-and-step ()
  "Send the current line to the inferior shell and step to the next line.
When the region is active, send the region instead."
  (interactive)
  (let (from to end)
    (if (use-region-p)
        (setq from (region-beginning)
              to (region-end)
              end to)
      (setq from (line-beginning-position)
            to (line-end-position)
            end (1+ to)))
    (sh-send-text (buffer-substring-no-properties from to))
    (goto-char end)))

\f
;; mode-command and utility functions

(defun sh-after-hack-local-variables ()
  (when (assq 'sh-shell file-local-variables-alist)
    (sh-set-shell (if (symbolp sh-shell)
                      (symbol-name sh-shell)
                    sh-shell))))

(defvar sh-mode--treesit-settings)

(defun sh--guess-shell ()
  "Guess the shell used in the current buffer.
Return the name of the shell suitable for `sh-set-shell'."
  (cond ((save-excursion
           (goto-char (point-min))
           (looking-at auto-mode-interpreter-regexp))
         (match-string 2))
        ((not buffer-file-name) sh-shell-file)
        ;; Checks that use `buffer-file-name' follow.
        ((string-match "\\.m?spec\\'" buffer-file-name) "rpm")
        ((string-match "[.]sh\\>"     buffer-file-name) "sh")
        ((string-match "[.]bash\\(rc\\)?\\>"   buffer-file-name) "bash")
        ((string-match "[.]ksh\\>"    buffer-file-name) "ksh")
        ((string-match "[.]mkshrc\\>" buffer-file-name) "mksh")
        ((string-match "[.]t?csh\\(rc\\)?\\>" buffer-file-name) "csh")
        ((string-match "[.]zsh\\(rc\\|env\\)?\\>" buffer-file-name) "zsh")
	((equal (file-name-nondirectory buffer-file-name) ".profile") "sh")
        (t sh-shell-file)))

;;;###autoload
(define-derived-mode sh-base-mode prog-mode "Shell-script"
  "Generic major mode for editing shell scripts.

This is a generic major mode intended to be inherited by concrete
implementations.  Currently there are two: `sh-mode' and
`bash-ts-mode'."
  (make-local-variable 'sh-shell-file)
  (make-local-variable 'sh-shell)

  (setq-local skeleton-pair-default-alist
	      sh-skeleton-pair-default-alist)

  (setq-local paragraph-start (concat page-delimiter "\\|$"))
  (setq-local paragraph-separate (concat paragraph-start "\\|#!/"))
  (setq-local comment-start "# ")
  (setq-local comment-start-skip "#+[\t ]*")
  (setq-local local-abbrev-table sh-mode-abbrev-table)
  (setq-local comint-dynamic-complete-functions
	      sh-dynamic-complete-functions)
  (add-hook 'completion-at-point-functions #'comint-completion-at-point nil t)
  ;; we can't look if previous line ended with `\'
  (setq-local comint-prompt-regexp "^[ \t]*")
  (setq-local imenu-case-fold-search nil)
  (setq-local syntax-propertize-function #'sh-syntax-propertize-function)
  (add-hook 'syntax-propertize-extend-region-functions
            #'syntax-propertize-multiline 'append 'local)
  (setq-local skeleton-pair-alist '((?` _ ?`)))
  (setq-local skeleton-pair-filter-function #'sh-quoted-p)
  (setq-local skeleton-further-elements
	      '((< '(- (min sh-basic-offset (current-column))))))
  (setq-local skeleton-filter-function #'sh-feature)
  (setq-local skeleton-newline-indent-rigidly t)
  (setq-local defun-prompt-regexp
              (concat
               "^\\("
               "\\(function[ \t]\\)?[ \t]*[[:alnum:]_]+[ \t]*([ \t]*)"
               "\\|"
               "function[ \t]+[[:alnum:]_]+[ \t]*\\(([ \t]*)\\)?"
               "\\)[ \t]*"))
  (setq-local add-log-current-defun-function #'sh-current-defun-name)
  (add-hook 'completion-at-point-functions
            #'sh-completion-at-point-function nil t)
  (setq-local outline-regexp "###")
  (setq-local escaped-string-quote
              (lambda (terminator)
                (if (eq terminator ?')
                    "'\\'"
                  "\\"))))

;;;###autoload
(define-derived-mode sh-mode sh-base-mode "Shell-script"
  "Major mode for editing shell scripts.
This mode works for many shells, since they all have roughly the same syntax,
as far as commands, arguments, variables, pipes, comments etc. are concerned.
Unless the file's magic number indicates the shell, your usual shell is
assumed.  Since filenames rarely give a clue, they are not further analyzed.

This mode adapts to the variations between shells (see `sh-set-shell') by
means of an inheritance based feature lookup (see `sh-feature').  This
mechanism applies to all variables (including skeletons) that pertain to
shell-specific features.  Shell script files can use the `sh-shell' local
variable to indicate the shell variant to be used for the file.

The default style of this mode is that of Rosenblatt's Korn shell book.
The syntax of the statements varies with the shell being used.  The
following commands are available, based on the current shell's syntax:
\\<sh-mode-map>
\\[sh-case]	 case statement
\\[sh-for]	 for loop
\\[sh-function]	 function definition
\\[sh-if]	 if statement
\\[sh-indexed-loop]	 indexed loop from 1 to n
\\[sh-while-getopts]	 while getopts loop
\\[sh-repeat]	 repeat loop
\\[sh-select]	 select loop
\\[sh-until]	 until loop
\\[sh-while]	 while loop

For sh and rc shells indentation commands are:
\\[smie-config-show-indent]	Show the rules controlling this line's indentation.
\\[smie-config-set-indent]	Change the rules controlling this line's indentation.
\\[smie-config-guess]  Try to tweak the indentation rules so the
buffer indents as it currently is indented.


\\[backward-delete-char-untabify]	 Delete backward one position, even if it was a tab.
\\[sh-end-of-command]	 Go to end of successive commands.
\\[sh-beginning-of-command]	 Go to beginning of successive commands.
\\[sh-set-shell]	 Set this buffer's shell, and maybe its magic number.
\\[sh-execute-region]	 Have optional header and region be executed in a subshell.

`sh-electric-here-document-mode' controls whether insertion of two
unquoted < insert a here document.  You can control this behavior by
modifying `sh-mode-hook'.

If you generally program a shell different from your login shell you can
set `sh-shell-file' accordingly.  If your shell's file name doesn't correctly
indicate what shell it is use `sh-alias-alist' to translate.

If your shell gives error messages with line numbers, you can use \\[executable-interpret]
with your script for an edit-interpret-debug cycle."
  (setq font-lock-defaults
        `((sh-font-lock-keywords
           sh-font-lock-keywords-1 sh-font-lock-keywords-2)
          nil nil
          ((?/ . "w") (?~ . "w") (?. . "w") (?- . "w") (?_ . "w")) nil
          (font-lock-syntactic-face-function
           . ,#'sh-font-lock-syntactic-face-function)))
  ;; Parse or insert magic number for exec, and set all variables depending
  ;; on the shell thus determined.
  (sh-set-shell (sh--guess-shell) nil nil)
  (add-hook 'flymake-diagnostic-functions #'sh-shellcheck-flymake nil t)
  (add-hook 'hack-local-variables-hook
            #'sh-after-hack-local-variables nil t))

;;;###autoload
(defalias 'shell-script-mode 'sh-mode)

;;;###autoload
(define-derived-mode bash-ts-mode sh-base-mode "Bash"
  "Major mode for editing Bash shell scripts.
This mode automatically falls back to `sh-mode' if the buffer is
not written in Bash or sh."
  :syntax-table sh-mode-syntax-table
  (when (treesit-ready-p 'bash)
    (sh-set-shell "bash" nil nil)
    (add-hook 'flymake-diagnostic-functions #'sh-shellcheck-flymake nil t)
    (add-hook 'hack-local-variables-hook
              #'sh-after-hack-local-variables nil t)
    (treesit-parser-create 'bash)
    (setq-local treesit-font-lock-feature-list
                '(( comment function)
                  ( command declaration-command keyword string)
                  ( builtin-variable constant heredoc number
                    string-interpolation variable)
                  ( bracket delimiter misc-punctuation operator)))
    (setq-local treesit-font-lock-settings
                sh-mode--treesit-settings)
    (setq-local treesit-defun-type-regexp "function_definition")
    (treesit-major-mode-setup)))

(advice-add 'bash-ts-mode :around #'sh--redirect-bash-ts-mode
            ;; Give it lower precedence than normal advice, so other
            ;; advices take precedence over it.
            '((depth . 50)))

(defvar sh--redirect-recursing nil)
(defun sh--redirect-bash-ts-mode (oldfn)
  "Redirect to `sh-mode' if the current file is not written in Bash or sh.
OLDFN should be `bash-ts-mode'."
  (let ((sh--redirect-recursing sh--redirect-recursing))
    (funcall (if (or delay-mode-hooks sh--redirect-recursing)
                 oldfn
               (setq sh--redirect-recursing t)
               (if (member (file-name-base (sh--guess-shell)) '("bash" "sh"))
                   oldfn
                 #'sh-mode)))))

(defun sh-font-lock-keywords (&optional keywords)
  "Function to get simple fontification based on `sh-font-lock-keywords'.
This adds rules for comments and assignments."
  (sh-feature sh-font-lock-keywords-var
	      (when (stringp (sh-feature sh-assignment-regexp))
		(lambda (list)
		  `((,(sh-feature sh-assignment-regexp)
		     1 font-lock-variable-name-face)
		    ,@keywords
		    ,@list
		    ,@executable-font-lock-keywords)))))

(defun sh-font-lock-keywords-1 (&optional builtins)
  "Function to get better fontification including keywords."
  (let ((keywords (concat "\\([;(){}`|&]\\|^\\)[ \t]*\\(\\("
			  (regexp-opt (sh-feature sh-leading-keywords) t)
			  "[ \t]+\\)?"
			  (regexp-opt (append (sh-feature sh-leading-keywords)
					      (sh-feature sh-other-keywords))
				      t))))
    (sh-font-lock-keywords
     `(,@(if builtins
	     `((,(concat keywords "[ \t]+\\)?"
			 (regexp-opt (sh-feature sh-builtins) t)
			 "\\>")
		(2 font-lock-keyword-face nil t)
		(6 font-lock-builtin-face))
	       ,@(sh-feature sh-font-lock-keywords-var-2)))
	 (,(concat keywords "\\)\\>")
	  2 font-lock-keyword-face)
	 ,@(sh-feature sh-font-lock-keywords-var-1)))))

(defun sh-font-lock-keywords-2 ()
  "Function to get better fontification including keywords and builtins."
  (sh-font-lock-keywords-1 t))

;;; Completion

(defvar sh--completion-keywords '("if" "while" "until" "for" "then"))

(defun sh--vars-before-point ()
  (save-excursion
    (let ((vars ()))
      (while (re-search-backward "^[ \t]*\\([[:alnum:]_]+\\)=" nil t)
        (push (match-string 1) vars))
      vars)))

;; (defun sh--var-completion-table (string pred action)
;;   (complete-with-action action (sh--vars-before-point) string pred))

(defun sh--cmd-completion-table-gen (string)
  (append (when (fboundp 'imenu--make-index-alist)
            (mapcar #'car
                    (condition-case nil
                        (imenu--make-index-alist)
                      (imenu-unavailable nil))))
          (mapcar (lambda (v) (concat v "="))
                  (sh--vars-before-point))
          (locate-file-completion-table
           exec-path exec-suffixes string nil t)
          sh--completion-keywords))

(defun sh-completion-at-point-function ()
  (save-excursion
    (skip-chars-forward "[:alnum:]_")
    (let ((end (point))
          (_ (skip-chars-backward "[:alnum:]_"))
          (start (point)))
      (cond
       ((eq (char-before) ?$)
        (list start end (sh--vars-before-point)
              :company-kind (lambda (_) 'variable)))
       ((sh-smie--keyword-p)
        (list start end
              (completion-table-with-cache #'sh--cmd-completion-table-gen)
              :company-kind
              (lambda (s)
                (cond
                 ((member s sh--completion-keywords) 'keyword)
                 ((string-suffix-p "=" s) 'variable)
                 (t 'function)))))))))

;;; Indentation and navigation with SMIE.

(require 'smie)

(defun sh-smie--keyword-p ()
  "Non-nil if we're at a keyword position.
A keyword position is one where if we're looking at something that looks
like a keyword, then it is a keyword."
  (let ((prev (funcall smie-backward-token-function)))
    (if (zerop (length prev))
        (looking-back "\\`\\|\\s(" (1- (point)))
      (assoc prev smie-grammar))))

(defun sh-smie--newline-semi-p (&optional tok)
  "Return non-nil if a newline should be treated as a semi-colon.
Here we assume that a newline should be treated as a semi-colon unless it
comes right after a special keyword.
This function does not pay attention to line-continuations.
If TOK is nil, point should be before the newline; otherwise, TOK is the token
before the newline and in that case point should be just before the token."
  (save-excursion
    (unless tok
      (setq tok (funcall smie-backward-token-function)))
    (if (and (zerop (length tok))
             (looking-back "\\s(" (1- (point))))
        nil
      (not (numberp (nth 2 (assoc tok smie-grammar)))))))

;;;; SMIE support for `sh'.

(defconst sh-smie-sh-grammar
  (smie-prec2->grammar
   (smie-bnf->prec2
    '((exp)                    ;A constant, or a $var, or a sequence of them...
      (cmd ("case" exp "in" branches "esac")
           ("if" cmd "then" cmd "fi")
           ("if" cmd "then" cmd "else" cmd "fi")
           ("if" cmd "then" cmd "elif" cmd "then" cmd "fi")
           ("if" cmd "then" cmd "elif" cmd "then" cmd "else" cmd "fi")
           ("if" cmd "then" cmd "elif" cmd "then" cmd
                                "elif" cmd "then" cmd "else" cmd "fi")
           ("while" cmd "do" cmd "done")
           ("until" cmd "do" cmd "done")
           ("for" exp "in" cmd "do" cmd "done")
           ("for" exp "do" cmd "done")
           ("select" exp "in" cmd "do" cmd "done")   ;bash&zsh&ksh88.
           ("repeat" exp "do" cmd "done")            ;zsh.
           (exp "always" exp)                        ;zsh.
           (cmd "|" cmd) (cmd "|&" cmd)
           (cmd "&&" cmd) (cmd "||" cmd)
           (cmd ";" cmd) (cmd "&" cmd))
      (rpattern (rpattern "|" rpattern))
      (pattern (rpattern) ("case-(" rpattern))
      (branches (branches ";;" branches)
                (branches ";&" branches) (branches ";;&" branches) ;bash.
                (pattern "case-)" cmd)))
    '((assoc ";;" ";&" ";;&"))
    '((assoc ";" "&") (assoc "&&" "||") (assoc "|" "|&")))))

(defconst sh-smie--sh-operators
  (delq nil (mapcar (lambda (x)
                      (setq x (car x))
                      (and (stringp x)
                           (not (string-match "\\`[a-z]" x))
                           x))
                    sh-smie-sh-grammar)))

(defconst sh-smie--sh-operators-re (regexp-opt sh-smie--sh-operators))
(defconst sh-smie--sh-operators-back-re
  (concat "\\(?:^\\|[^\\]\\)\\(?:\\\\\\\\\\)*"
          "\\(" sh-smie--sh-operators-re "\\)"))

(defun sh-smie--sh-keyword-in-p ()
  "Assuming we're looking at \"in\", return non-nil if it's a keyword.
Does not preserve point."
  (let ((forward-sexp-function nil)
        (words nil)                     ;We've seen words.
        (newline nil)                   ;We've seen newlines after the words.
        (res nil)
        prev)
    (while (not res)
      (setq prev (funcall smie-backward-token-function))
      (cond
       ((zerop (length prev))
	(cond
	 (newline (cl-assert words) (setq res 'word))
	 ((bobp) (setq res 'word))
	 (t
          (setq words t)
          (condition-case nil
              (forward-sexp -1)
            (scan-error (setq res 'unknown))))))
       ((equal prev ";")
        (if words (setq newline t)
          (setq res 'keyword)))
       ((member prev '("case" "for" "select")) (setq res 'keyword))
       ((assoc prev smie-grammar) (setq res 'word))
       (t
        (if newline
            (progn (cl-assert words) (setq res 'word))
          (setq words t)))))
    (eq res 'keyword)))

(defun sh-smie--sh-keyword-p (tok)
  "Non-nil if TOK (at which we're looking) really is a keyword."
  (cond
   ((looking-at "[[:alnum:]_]+=") nil)
   ((equal tok "in") (sh-smie--sh-keyword-in-p))
   (t (sh-smie--keyword-p))))

(defun sh-smie--default-forward-token ()
  (forward-comment (point-max))
  (buffer-substring-no-properties
   (point)
   (progn (if (zerop (skip-syntax-forward "."))
              (while (progn (skip-syntax-forward "w_'")
                            (looking-at "\\\\"))
                (forward-char 2)))
          (point))))

(defun sh-smie--default-backward-token ()
  (forward-comment (- (point)))
  (let ((pos (point))
        (n (skip-syntax-backward ".")))
    (if (or (zerop n)
            (and (eq n -1)
                 ;; Skip past quoted white space.
                 (let ((p (point)))
                   (if (eq -1 (% (skip-syntax-backward "\\") 2))
                       t
                     (goto-char p)
                     nil))))
        (while
            (progn
              ;; Skip past words, but stop at semicolons.
              (while (and (not (zerop (skip-syntax-backward "w_'")))
                          (not (eq (char-before (point)) ?\;))
                          (skip-syntax-backward ".")))
              (or (not (zerop (skip-syntax-backward "\\")))
                  ;; Skip past quoted white space.
                  (when (eq ?\\ (char-before (1- (point))))
                    (let ((p (point)))
                      (forward-char -1)
                      (if (eq -1 (% (skip-syntax-backward "\\") 2))
                          t
                        (goto-char p)
                        nil))))))
      (goto-char (- (point) (% (skip-syntax-backward "\\") 2))))
    (buffer-substring-no-properties (point) pos)))

(defun sh-smie-sh-forward-token ()
  (if (and (looking-at "[ \t]*\\(?:#\\|\\(\\s|\\)\\|$\\)")
           (save-excursion
             (skip-chars-backward " \t")
             (not (bolp))))
      (if (and (match-end 1) (not (nth 3 (syntax-ppss))))
          ;; Right before a here-doc.
          (let ((forward-sexp-function nil))
            (forward-sexp 1)
            ;; Pretend the here-document is a "newline representing a
            ;; semi-colon", since the here-doc otherwise covers the newline(s).
            ";")
        (unless (eobp)
          (let ((semi (sh-smie--newline-semi-p)))
            (forward-line 1)
            (if (or semi (eobp)) ";"
              (sh-smie-sh-forward-token)))))
    (forward-comment (point-max))
    (cond
     ((looking-at "\\\\\n") (forward-line 1) (sh-smie-sh-forward-token))
     ((looking-at sh-smie--sh-operators-re)
      (goto-char (match-end 0))
      (let ((tok (match-string-no-properties 0)))
        (if (and (memq (aref tok (1- (length tok))) '(?\; ?\& ?\|))
                 (looking-at "[ \t]*\\(?:#\\|$\\)"))
            (forward-line 1))
        tok))
     (t
      (let* ((pos (point))
             (tok (sh-smie--default-forward-token)))
        (cond
         ((equal tok ")") "case-)")
         ((equal tok "(") "case-(")
         ((and tok (string-match "\\`[a-z]" tok)
               (assoc tok smie-grammar)
               (not
                (save-excursion
                  (goto-char pos)
                  (sh-smie--sh-keyword-p tok))))
          " word ")
         (t tok)))))))

(defun sh-smie--looking-back-at-continuation-p ()
  (save-excursion
    (and (if (eq (char-before) ?\n) (progn (forward-char -1) t) (eolp))
         (looking-back "\\(?:^\\|[^\\]\\)\\(?:\\\\\\\\\\)*\\\\"
                       (line-beginning-position)))))

(defun sh-smie-sh-backward-token ()
  (let ((bol (line-beginning-position)))
    (forward-comment (- (point)))
    (cond
     ((and (bolp) (not (bobp))
           (equal (syntax-after (1- (point))) (string-to-syntax "|"))
           (not (nth 3 (syntax-ppss))))
      ;; Right after a here-document.
      (let ((forward-sexp-function nil))
        (forward-sexp -1)
        ;; Pretend the here-document is a "newline representing a
        ;; semi-colon", since the here-doc otherwise covers the newline(s).
        ";"))
     ((< (point) bol)
      (cond
       ((sh-smie--looking-back-at-continuation-p)
        (forward-char -1)
        (funcall smie-backward-token-function))
       ((sh-smie--newline-semi-p) ";")
       (t (funcall smie-backward-token-function))))
     ((looking-back sh-smie--sh-operators-back-re
                    (line-beginning-position) 'greedy)
      (goto-char (match-beginning 1))
      (match-string-no-properties 1))
     (t
      (let ((tok (sh-smie--default-backward-token)))
        (cond
         ((equal tok ")") "case-)")
         ((equal tok "(") "case-(")
         ((and tok (string-match "\\`[a-z]" tok)
               (assoc tok smie-grammar)
               (not (save-excursion (sh-smie--sh-keyword-p tok))))
          " word ")
         (t tok)))))))

(defcustom sh-indent-after-continuation t
  "If non-nil, indent relative to the continued line's beginning.
Continued lines can either be indented as \"one long wrapped line\" without
paying attention to the actual syntactic structure, as in:

   for f \\
       in a; do \\
       toto; \\
       done

or as lines that just don't have implicit semi-colons between them, as in:

   for f \\
   in a; do \\
       toto; \\
   done

With `always' you get the former behavior whereas with nil you get the latter.
With t, you get the latter as long as that would indent the continuation line
deeper than the initial line."
  :version "25.1"
  :type '(choice
          (const :value nil    :tag "Never")
          (const :value t      :tag "Only if needed to make it deeper")
          (const :value always :tag "Always"))
  :group 'sh-indentation)

(defun sh-smie--continuation-start-indent ()
  "Return the initial indentation of a continued line.
May return nil if the line should not be treated as continued."
  (save-excursion
    (forward-line -1)
    (unless (sh-smie--looking-back-at-continuation-p)
      (current-indentation))))

(defun sh-smie--indent-continuation ()
  (cond
   ((not (and sh-indent-after-continuation
              (save-excursion
                (ignore-errors
                  (skip-chars-backward " \t")
                  (sh-smie--looking-back-at-continuation-p)))))
    nil)
   ((eq sh-indent-after-continuation 'always)
    (save-excursion
      (forward-line -1)
      (if (sh-smie--looking-back-at-continuation-p)
          (current-indentation)
        (+ (current-indentation) sh-basic-offset))))
   (t
    ;; Just make sure a line-continuation is indented deeper.
    (save-excursion
      (let ((indent (let ((sh-indent-after-continuation nil))
                      (smie-indent-calculate)))
            (max most-positive-fixnum))
        (if (not (numberp indent)) indent
          (while (progn
                   (forward-line -1)
                   (let ((ci (current-indentation)))
                     (cond
                      ;; Previous line is less indented, we're good.
                      ((< ci indent) nil)
                      ((sh-smie--looking-back-at-continuation-p)
                       (setq max (min max ci))
                       ;; Previous line is itself a continuation.
                       ;; If it's indented like us, we're good, otherwise
                       ;; check the line before that one.
                       (> ci indent))
                      (t ;Previous line is the beginning of the continued line.
                       (setq indent (min (+ ci sh-basic-offset) max))
                       nil)))))
          indent))))))

(defun sh-smie-sh-rules (kind token)
  (pcase (cons kind token)
    ('(:elem . basic) sh-basic-offset)
    ('(:after . "case-)") (- (sh-var-value 'sh-indent-for-case-alt)
                             (sh-var-value 'sh-indent-for-case-label)))
    (`(:before . ,(or "(" "{" "[" "while" "if" "for" "case"))
     (cond
      ((and (equal token "{") (smie-rule-parent-p "for"))
       (let ((data (smie-backward-sexp "in")))
         (when (equal (nth 2 data) "for")
           `(column . ,(smie-indent-virtual)))))
      ((not (smie-rule-prev-p "&&" "||" "|"))
       (when (smie-rule-hanging-p)
         (smie-rule-parent)))
      (t
       (unless (smie-rule-bolp)
	 (while (equal "|" (nth 2 (smie-backward-sexp 'halfexp))))
	 `(column . ,(smie-indent-virtual))))))
    ;; FIXME: Maybe this handling of ;; should be made into
    ;; a smie-rule-terminator function that takes the substitute ";" as arg.
    (`(:before . ,(or ";;" ";&" ";;&"))
     (if (and (smie-rule-bolp) (looking-at ";;?&?[ \t]*\\(#\\|$\\)"))
         (cons 'column (smie-indent-keyword ";"))
       (smie-rule-separator kind)))
    (`(:after . ,(or ";;" ";&" ";;&"))
     (with-demoted-errors "SMIE rule error: %S"
       (smie-backward-sexp token)
       (cons 'column
             (if (or (smie-rule-bolp)
                     (save-excursion
                       (and (member (funcall smie-backward-token-function)
                                    '("in" ";;"))
                            (smie-rule-bolp))))
                 (current-column)
               (smie-indent-calculate)))))
    (`(:before . ,(or "|" "&&" "||"))
     (when (and (not (smie-rule-parent-p token))
                (or (not (equal token "&&"))
                    sh-indent-statement-after-and))
       (smie-backward-sexp token)
       `(column . ,(+ (funcall smie-rules-function :elem 'basic)
                      (smie-indent-virtual)))))

    ;; Attempt at backward compatibility with the old config variables.
    ('(:before . "fi") (sh-var-value 'sh-indent-for-fi))
    ('(:before . "done") (sh-var-value 'sh-indent-for-done))
    ('(:after . "else") (sh-var-value 'sh-indent-after-else))
    ('(:after . "if") (sh-var-value 'sh-indent-after-if))
    ('(:before . "then") (sh-var-value 'sh-indent-for-then))
    ('(:before . "do") (sh-var-value 'sh-indent-for-do))
    ('(:after . "do")
     (sh-var-value (if (smie-rule-hanging-p)
                       'sh-indent-after-loop-construct 'sh-indent-after-do)))
    ;; sh-indent-after-done: aligned completely differently.
    ('(:after . "in") (sh-var-value 'sh-indent-for-case-label))
    ;; sh-indent-for-continuation: Line continuations are handled differently.
    (`(:after . ,(or "(" "{" "["))
     (if (not (looking-at ".[ \t]*[^\n \t#]"))
         (sh-var-value 'sh-indent-after-open)
       (goto-char (1- (match-end 0)))
       `(column . ,(current-column))))
    ;; sh-indent-after-function: we don't handle it differently.
    ))

;; (defconst sh-smie-csh-grammar
;;   (smie-prec2->grammar
;;    (smie-bnf->prec2
;;     '((exp)              ;A constant, or a $var, or a sequence of them...
;;       (elseifcmd (cmd)
;;                  (cmd "else" "else-if" exp "then" elseifcmd))
;;       (cmd ("switch" branches "endsw")
;;            ("if" exp)
;;            ("if" exp "then" cmd "endif")
;;            ("if" exp "then" cmd "else" cmd "endif")
;;            ("if" exp "then" elseifcmd "endif")
;;            ;; ("if" exp "then" cmd "else" cmd "endif")
;;            ;; ("if" exp "then" cmd "else" "if" exp "then" cmd "endif")
;;            ;; ("if" exp "then" cmd "else" "if" exp "then" cmd
;;            ;;                      "else" cmd "endif")
;;            ;; ("if" exp "then" cmd "else" "if" exp "then" cmd
;;            ;;                      "else" "if" exp "then" cmd "endif")
;;            ("while" cmd "end")
;;            ("foreach" cmd "end")
;;            (cmd "|" cmd) (cmd "|&" cmd)
;;            (cmd "&&" cmd) (cmd "||" cmd)
;;            (cmd ";" cmd) (cmd "&" cmd))
;;       ;; This is a lie, but (combined with the corresponding disambiguation
;;       ;; rule) it makes it more clear that `case' and `default' are the key
;;       ;; separators and the `:' is a secondary tokens.
;;       (branches (branches "case" branches)
;;                 (branches "default" branches)
;;                 (exp ":" branches)))
;;     '((assoc "else" "then" "endif"))
;;     '((assoc "case" "default") (nonassoc ":"))
;;     '((assoc ";;" ";&" ";;&"))
;;     '((assoc ";" "&") (assoc "&&" "||") (assoc "|" "|&")))))

;;;; SMIE support for `rc'.

(defconst sh-smie-rc-grammar
  (smie-prec2->grammar
   (smie-bnf->prec2
    '((exp)                    ;A constant, or a $var, or a sequence of them...
      (cmd (cmd "case" cmd)
           ("if" exp)
           ("switch" exp)
           ("for" exp) ("while" exp)
           (cmd "|" cmd) (cmd "|&" cmd)
           (cmd "&&" cmd) (cmd "||" cmd)
           (cmd ";" cmd) (cmd "&" cmd))
      (pattern (pattern "|" pattern))
      (branches (branches ";;" branches)
                (branches ";&" branches) (branches ";;&" branches) ;bash.
                (pattern "case-)" cmd)))
    '((assoc ";;" ";&" ";;&"))
    '((assoc "case") (assoc ";" "&") (assoc "&&" "||") (assoc "|" "|&")))))

(defun sh-smie--rc-after-special-arg-p ()
  "Check if we're after the first arg of an if/while/for/... construct.
Returns the construct's token and moves point before it, if so."
  (forward-comment (- (point)))
  (when (looking-back ")\\|\\_<not" (- (point) 3))
    (ignore-errors
      (let ((forward-sexp-function nil))
        (forward-sexp -1)
        (car (member (funcall smie-backward-token-function)
                     '("if" "for" "switch" "while")))))))

(defun sh-smie--rc-newline-semi-p ()
  "Return non-nil if a newline should be treated as a semi-colon.
Point should be before the newline."
  (save-excursion
    (let ((tok (funcall smie-backward-token-function)))
      (if (or (when (equal tok "not") (forward-word-strictly 1) t)
              (and (zerop (length tok)) (eq (char-before) ?\))))
          (not (sh-smie--rc-after-special-arg-p))
        (sh-smie--newline-semi-p tok)))))

(defun sh-smie-rc-forward-token ()
  ;; FIXME: Code duplication with sh-smie-sh-forward-token.
  (if (and (looking-at "[ \t]*\\(?:#\\|\\(\\s|\\)\\|$\\)")
           (save-excursion
             (skip-chars-backward " \t")
             (not (bolp))))
      (if (and (match-end 1) (not (nth 3 (syntax-ppss))))
          ;; Right before a here-doc.
          (let ((forward-sexp-function nil))
            (forward-sexp 1)
            ;; Pretend the here-document is a "newline representing a
            ;; semi-colon", since the here-doc otherwise covers the newline(s).
            ";")
        (let ((semi (sh-smie--rc-newline-semi-p)))
          (forward-line 1)
          (if (or semi (eobp)) ";"
            (sh-smie-rc-forward-token))))
    (forward-comment (point-max))
    (cond
     ((looking-at "\\\\\n") (forward-line 1) (sh-smie-rc-forward-token))
     ;; ((looking-at sh-smie--rc-operators-re)
     ;;  (goto-char (match-end 0))
     ;;  (let ((tok (match-string-no-properties 0)))
     ;;    (if (and (memq (aref tok (1- (length tok))) '(?\; ?\& ?\|))
     ;;             (looking-at "[ \t]*\\(?:#\\|$\\)"))
     ;;        (forward-line 1))
     ;;    tok))
     (t
      (let* ((pos (point))
             (tok (sh-smie--default-forward-token)))
        (cond
         ;; ((equal tok ")") "case-)")
         ((and tok (string-match "\\`[a-z]" tok)
               (assoc tok smie-grammar)
               (not
                (save-excursion
                  (goto-char pos)
                  (sh-smie--keyword-p))))
          " word ")
         (t tok)))))))

(defun sh-smie-rc-backward-token ()
  ;; FIXME: Code duplication with sh-smie-sh-backward-token.
  (let ((bol (line-beginning-position)))
    (forward-comment (- (point)))
    (cond
     ((and (bolp) (not (bobp))
           (equal (syntax-after (1- (point))) (string-to-syntax "|"))
           (not (nth 3 (syntax-ppss))))
      ;; Right after a here-document.
      (let ((forward-sexp-function nil))
        (forward-sexp -1)
        ;; Pretend the here-document is a "newline representing a
        ;; semi-colon", since the here-doc otherwise covers the newline(s).
        ";"))
     ((< (point) bol)                   ;We skipped over a newline.
      (cond
       ;; A continued line.
       ((and (eolp)
             (looking-back "\\(?:^\\|[^\\]\\)\\(?:\\\\\\\\\\)*\\\\"
                           (line-beginning-position)))
        (forward-char -1)
        (funcall smie-backward-token-function))
       ((sh-smie--rc-newline-semi-p) ";")
       (t (funcall smie-backward-token-function))))
     ;; ((looking-back sh-smie--sh-operators-back-re
     ;;                (line-beginning-position) 'greedy)
     ;;  (goto-char (match-beginning 1))
     ;;  (match-string-no-properties 1))
     (t
      (let ((tok (sh-smie--default-backward-token)))
        (cond
         ;; ((equal tok ")") "case-)")
         ((and tok (string-match "\\`[a-z]" tok)
               (assoc tok smie-grammar)
               (not (save-excursion (sh-smie--keyword-p))))
          " word ")
         (t tok)))))))

(defun sh-smie-rc-rules (kind token)
  (pcase (cons kind token)
    ('(:elem . basic) sh-basic-offset)
    ;; (`(:after . "case") (or sh-basic-offset smie-indent-basic))
    ('(:after . ";")
     (if (smie-rule-parent-p "case")
         (smie-rule-parent (sh-var-value 'sh-indent-after-case))))
    ('(:before . "{")
     (save-excursion
       (when (sh-smie--rc-after-special-arg-p)
         `(column . ,(current-column)))))
    (`(:before . ,(or "(" "{" "["))
     (if (smie-rule-hanging-p) (smie-rule-parent)))
    ;; FIXME: SMIE parses "if (exp) cmd" as "(if ((exp) cmd))" so "cmd" is
    ;; treated as an arg to (exp) by default, which indents it all wrong.
    ;; To handle it right, we should extend smie-indent-exps so that the
    ;; preceding keyword can give special rules.  Currently the only special
    ;; rule we have is the :list-intro hack, which we use here to align "cmd"
    ;; with "(exp)", which is rarely the right thing to do, but is better
    ;; than nothing.
    (`(:list-intro . ,(or "for" "if" "while")) t)
    ;; sh-indent-after-switch: handled implicitly by the default { rule.
    ))

;;; End of SMIE code.

(defvar sh-regexp-for-done nil
  "A buffer-local regexp to match opening keyword for done.")


(defun sh-set-shell (shell &optional no-query-flag insert-flag)
  "Set this buffer's shell to SHELL (a string).
When used interactively, insert the proper starting #!-line,
and make the visited file executable via `executable-set-magic',
perhaps querying depending on the value of `executable-query'.
(If given a prefix (i.e., `\\[universal-argument]') don't insert any starting #!
line.)

When this function is called noninteractively, INSERT-FLAG (the third
argument) controls whether to insert a #!-line and think about making
the visited file executable, and NO-QUERY-FLAG (the second argument)
controls whether to query about making the visited file executable.

Calls the value of `sh-set-shell-hook' if set.

Shell script files can cause this function be called automatically
when the file is visited by having a `sh-shell' file-local variable
whose value is the shell name (don't quote it)."
  (interactive (list (completing-read
                      (format-prompt "Shell" sh-shell-file)
                      ;; This used to use interpreter-mode-alist, but that is
                      ;; no longer appropriate now that uses regexps.
                      ;; Maybe there could be a separate variable that lists
                      ;; the shells, used here and to construct i-mode-alist.
                      ;; But the following is probably good enough:
                      (append (mapcar (lambda (e) (symbol-name (car e)))
                                      sh-ancestor-alist)
                              '("csh" "rc" "sh"))
                      nil nil nil nil sh-shell-file)
		     (eq executable-query 'function)
		     (not current-prefix-arg)))
  (if (string-match "\\.exe\\'" shell)
      (setq shell (substring shell 0 (match-beginning 0))))
  (setq sh-shell (sh-canonicalize-shell shell))
  (if insert-flag
      (setq sh-shell-file
	    (executable-set-magic shell (sh-feature sh-shell-arg)
				  no-query-flag insert-flag)))
  (setq mode-line-process (format "[%s]" sh-shell))
  (setq-local sh-shell-variables nil)
  (setq-local sh-shell-variables-initialized nil)
  (setq-local imenu-generic-expression
	      (sh-feature sh-imenu-generic-expression))
  (let ((tem (sh-feature sh-mode-syntax-table-input)))
    (when tem
      (setq-local sh-mode-syntax-table
		  (apply 'sh-mode-syntax-table tem))
      (set-syntax-table sh-mode-syntax-table)))
  (dolist (var (sh-feature sh-variables))
    (sh-remember-variable var))
  (if (setq-local sh-indent-supported-here
		  (sh-feature sh-indent-supported))
      (progn
	(message "Setting up indent for shell type %s" sh-shell)
        (let ((mksym (lambda (name)
                       (intern (format "sh-smie-%s-%s"
                                       sh-indent-supported-here name)))))
	  (add-function :around (local 'smie--hanging-eolp-function)
			(lambda (orig)
			  (if (looking-at "[ \t]*\\\\\n")
			      (goto-char (match-end 0))
			    (funcall orig))))
          (add-hook 'smie-indent-functions #'sh-smie--indent-continuation nil t)
          (smie-setup (symbol-value (funcall mksym "grammar"))
                      (funcall mksym "rules")
                      :forward-token  (funcall mksym "forward-token")
                      :backward-token (funcall mksym "backward-token")))
	(if sh-make-vars-local
	    (sh-make-vars-local))
	(message "Indentation setup for shell type %s" sh-shell))
    (message "No indentation for this shell type.")
    (setq-local indent-line-function #'sh-basic-indent-line))
  (when font-lock-mode
    (setq font-lock-set-defaults nil)
    (font-lock-set-defaults)
    (font-lock-flush))
  (setq sh-shell-process nil)
  (run-hooks 'sh-set-shell-hook))


(defun sh-feature (alist &optional function)
  "Index ALIST by the current shell.
If ALIST isn't a list where every element is a cons, it is returned as is.
Else indexing follows an inheritance logic which works in two ways:

  - Fall back on successive ancestors (see `sh-ancestor-alist') as long as
    the alist contains no value for the current shell.
    The ultimate default is always `sh'.

  - If the value thus looked up is a list starting with `sh-append',
    we call the function `sh-append' with the rest of the list as
    arguments, and use the value.  However, the next element of the
    list is not used as-is; instead, we look it up recursively
    in ALIST to allow the function called to define the value for
    one shell to be derived from another shell.
    The value thus determined is physically replaced into the alist.

If FUNCTION is non-nil, it is called with one argument,
the value thus obtained, and the result is used instead."
  (or (if (consp alist)
	  ;; Check for something that isn't a valid alist.
	  (let ((l alist))
	    (while (and l (consp (car l)))
	      (setq l (cdr l)))
	    (if l alist)))

      (let ((orig-sh-shell sh-shell))
	(let ((sh-shell sh-shell)
	      elt val)
	  (while (and sh-shell
		      (not (setq elt (assq sh-shell alist))))
	    (setq sh-shell (cdr (assq sh-shell sh-ancestor-alist))))
	  ;; If the shell is not known, treat it as sh.
	  (unless elt
	    (setq elt (assq 'sh alist)))
	  (setq val (cdr elt))
	  (if (and (consp val)
		   (memq (car val) '(sh-append sh-modify)))
	      (setq val
		    (apply (car val)
			   ;; Refer to the value for a different shell,
			   ;; as a kind of inheritance.
			   (let ((sh-shell (car (cdr val))))
			     (sh-feature alist))
			   (cddr val))))
	  (if function
	      (setq sh-shell orig-sh-shell
		    val (funcall function val)))
	  val))))



(defun sh-append (ancestor &rest list)
  "Return list composed of first argument (a list) physically appended to rest."
  (nconc list ancestor))


(defun sh-modify (skeleton &rest list)
  "Modify a copy of SKELETON by replacing I1 with REPL1, I2 with REPL2 ..."
  (setq skeleton (copy-sequence skeleton))
  (while list
    (setcar (or (nthcdr (car list) skeleton)
		(error "Index %d out of bounds" (car list)))
	    (car (cdr list)))
    (setq list (nthcdr 2 list)))
  skeleton)


(defun sh-basic-indent-line ()
  "Indent a line for Sh mode (shell script mode).
Indent as far as preceding non-empty line, then by steps of `sh-basic-offset'.
Lines containing only comments are considered empty."
  (interactive)
  (let ((previous (save-excursion
		    (while (and (progn (beginning-of-line)
				       (not (bobp)))
				(progn
				  (forward-line -1)
				  (back-to-indentation)
				  (or (eolp)
				      (eq (following-char) ?#)))))
		    (current-column)))
	current)
    (save-excursion
      (indent-to (if (or (eq this-command 'newline-and-indent)
                         (and electric-indent-mode (eq this-command 'newline)))
		     previous
		   (if (< (current-column)
			  (setq current (progn (back-to-indentation)
					       (current-column))))
		       (if (eolp) previous 0)
		     (delete-region (point)
				    (progn (beginning-of-line) (point)))
		     (if (eolp)
			 (max previous (* (1+ (/ current sh-basic-offset))
					  sh-basic-offset))
		       (* (1+ (/ current sh-basic-offset)) sh-basic-offset))))))
    (if (< (current-column) (current-indentation))
	(skip-chars-forward " \t"))))


(defun sh-execute-region (start end &optional flag)
  "Pass optional header and region to a subshell for noninteractive execution.
The working directory is that of the buffer, and only environment variables
are already set which is why you can mark a header within the script.

The executed subshell is `sh-shell-file'.

With a positive prefix ARG, instead of sending region, define header from
beginning of buffer to point.  With a negative prefix ARG, instead of sending
region, clear header."
  (interactive "r\nP")
  (if flag
      (setq sh-header-marker (if (> (prefix-numeric-value flag) 0)
				 (point-marker)))
    (let ((shell-file-name sh-shell-file))
      (if sh-header-marker
	  (save-excursion
	    (let (buffer-undo-list)
	      (goto-char sh-header-marker)
	      (append-to-buffer (current-buffer) start end)
	      (shell-command-on-region (point-min)
				       (setq end (+ sh-header-marker
						    (- end start)))
				       sh-shell-file)
	      (delete-region sh-header-marker end)))
        (shell-command-on-region start end (concat sh-shell-file " -"))))))


(defun sh-remember-variable (var)
  "Make VARIABLE available for future completing reads in this buffer."
  (or (< (length var) sh-remember-variable-min)
      (getenv var)
      (assoc var sh-shell-variables)
      (push (cons var var) sh-shell-variables))
  var)



(defun sh-quoted-p ()
  "Is point preceded by an odd number of backslashes?"
  (eq -1 (% (save-excursion (skip-chars-backward "\\\\")) 2)))
\f
;; Indentation stuff.

(defun sh-make-vars-local ()
  "Make the indentation variables local to this buffer.
Normally they already are local.  This command is provided in case
variable `sh-make-vars-local' has been set to nil.

To revert all these variables to the global values, use
command `sh-reset-indent-vars-to-global-values'."
  (interactive)
  (mapc 'make-local-variable sh-var-list)
  (message "Indentation variables are now local."))

(defun sh-reset-indent-vars-to-global-values ()
  "Reset local indentation variables to the global values.
Then, if variable `sh-make-vars-local' is non-nil, make them local."
  (interactive)
  (mapc 'kill-local-variable sh-var-list)
  (if sh-make-vars-local
      (mapcar 'make-local-variable sh-var-list)))

(defun sh-in-comment-or-string (start)
  "Return non-nil if START is in a comment or string."
  (save-excursion
    (let ((state (syntax-ppss start)))
      (or (nth 3 state) (nth 4 state)))))


(defun sh-var-value (var &optional ignore-error)
  "Return the value of variable VAR, interpreting symbols.
It can also return t or nil.
If an invalid value is found, throw an error unless Optional argument
IGNORE-ERROR is non-nil."
  (let ((val (symbol-value var)))
    (cond
     ((numberp val)
      val)
     ((eq val t)
      val)
     ((null val)
      val)
     ((eq val '+)
      sh-basic-offset)
     ((eq val '-)
      (- sh-basic-offset))
     ((eq val '++)
      (* 2 sh-basic-offset))
     ((eq val '--)
      (* 2 (- sh-basic-offset)))
     ((eq val '*)
      (/ sh-basic-offset 2))
     ((eq val '/)
      (/ (- sh-basic-offset) 2))
     (t
      (funcall (if ignore-error #'message #'error)
               "Don't know how to handle %s's value of %s" var val)
      0))))

(define-obsolete-function-alias 'sh-show-indent
  #'smie-config-show-indent "28.1")

(define-obsolete-function-alias 'sh-set-indent #'smie-config-set-indent "28.1")

(define-obsolete-function-alias 'sh-learn-line-indent
  #'smie-config-set-indent "28.1")

(define-obsolete-function-alias 'sh-learn-buffer-indent
  #'smie-config-guess "28.1")

;; ========================================================================

;; Styles -- a quick and dirty way of saving the indentation settings.

(defvar sh-styles-alist nil
  "A list of all known shell indentation styles.")

(defun sh-name-style (name &optional confirm-overwrite)
  "Name the current indentation settings as a style called NAME.
If this name exists, the command will prompt whether it should be
overwritten if
- - it was called interactively with a prefix argument, or
- - called non-interactively with optional CONFIRM-OVERWRITE non-nil."
  ;; (interactive "sName for this style: ")
  (interactive
   (list
    (read-from-minibuffer "Name for this style? " )
    (not current-prefix-arg)))
  (let ((slist (cons name
		     (mapcar (lambda (var) (cons var (symbol-value var)))
			     sh-var-list)))
	(style (assoc name sh-styles-alist)))
    (if style
	(if (and confirm-overwrite
		 (not (y-or-n-p "This style exists.  Overwrite it? ")))
	    (message "Not changing style %s" name)
	  (message "Updating style %s" name)
	  (setcdr style (cdr slist)))
      (message "Creating new style %s" name)
      (push slist sh-styles-alist))))

(defun sh-load-style (name)
  "Set shell indentation values for this buffer from those in style NAME."
  (interactive (list (completing-read
		      "Which style to use for this buffer? "
		      sh-styles-alist nil t)))
  (let ((sl (assoc name  sh-styles-alist)))
    (if (null sl)
        (error "sh-load-style: Style %s not known" name)
      (dolist (var (cdr sl))
	(set (car var) (cdr var))))))

(defun sh-save-styles-to-buffer (buff)
  "Save all current styles in elisp to buffer BUFF.
This is always added to the end of the buffer."
  (interactive
   (list
    (read-from-minibuffer "Buffer to save styles in? " "*scratch*")))
  (with-current-buffer (get-buffer-create buff)
    (goto-char (point-max))
    (insert "\n")
    (pp `(setq sh-styles-alist ',sh-styles-alist) (current-buffer))))


\f
;; statement syntax-commands for various shells

;; You are welcome to add the syntax or even completely new statements as
;; appropriate for your favorite shell.

(defconst sh-non-closing-paren
  ;; If we leave it rear-sticky, calling `newline' ends up inserting a \n
  ;; that inherits this property, which then confuses the indentation.
  (propertize ")" 'syntax-table sh-st-punc 'rear-nonsticky t))

(define-skeleton sh-case
  "Insert a case/switch statement.  See `sh-feature'."
  (csh "expression: "
       "switch( " str " )" \n
       > "case " (read-string "pattern: ") ?: \n
       > _ \n
       "breaksw" \n
       ( "other pattern, %s: "
	 < "case " str ?: \n
	 > _ \n
	 "breaksw" \n)
       < "default:" \n
       > _ \n
       resume:
       < < "endsw" \n)
  (es)
  (rc "expression: "
      > "switch( " str " ) {" \n
      > "case " (read-string "pattern: ") \n
      > _ \n
      ( "other pattern, %s: "
	"case " str > \n
	> _ \n)
      "case *" > \n
      > _ \n
      resume:
      ?\} > \n)
  (sh "expression: "
      > "case " str " in" \n
      ( "pattern, %s: "
	> str sh-non-closing-paren \n
	> _ \n
	";;" \n)
      > "*" sh-non-closing-paren \n
      > _ \n
      resume:
      "esac" > \n))

(define-skeleton sh-for
  "Insert a for loop.  See `sh-feature'."
  (csh sh-modify sh
       1 ""
       2 "foreach "
       4 " ( "
       6 " )"
       15 '<
       16 "end")
  (es sh-modify rc
      4 " = ")
  (rc sh-modify sh
      2 "for( "
      6 " ) {"
      15 ?\} )
  (sh "Index variable: "
      > "for " str " in " _ "; do" \n
      > _ | ?$ & (sh-remember-variable str) \n
      "done" > \n))



(define-skeleton sh-indexed-loop
  "Insert an indexed loop from 1 to n.  See `sh-feature'."
  (bash sh-modify posix)
  (csh "Index variable: "
       "@ " str " = 1" \n
       "while( $" str " <= " (read-string "upper limit: ") " )" \n
       > _ ?$ str \n
       "@ " str "++" \n
       < "end" \n)
  (es sh-modify rc
      4 " =")
  (ksh88 "Index variable: "
	 > "integer " str "=0" \n
	 > "while (( ( " str " += 1 ) <= "
	 (read-string "upper limit: ")
	 " )); do" \n
	 > _ ?$ (sh-remember-variable str) > \n
	 "done" > \n)
  (posix "Index variable: "
	 > str "=1" \n
	 "while [ $" str " -le "
	 (read-string "upper limit: ")
	 " ]; do" \n
	 > _ ?$ str \n
	 str ?= (sh-add (sh-remember-variable str) 1) \n
	 "done" > \n)
  (rc "Index variable: "
      > "for( " str " in" " `{awk 'BEGIN { for( i=1; i<="
      (read-string "upper limit: ")
      "; i++ ) print i }'`}) {" \n
      > _ ?$ (sh-remember-variable str) \n
      ?\} > \n)
  (sh "Index variable: "
      > "for " str " in `awk 'BEGIN { for( i=1; i<="
      (read-string "upper limit: ")
      "; i++ ) print i }'`; do" \n
      > _ ?$ (sh-remember-variable str) \n
      "done" > \n))


(defun sh-shell-initialize-variables ()
  "Scan the buffer for variable assignments.
Add these variables to `sh-shell-variables'."
  (message "Scanning buffer `%s' for variable assignments..." (buffer-name))
  (save-excursion
    (goto-char (point-min))
    (setq sh-shell-variables-initialized t)
    (while (search-forward "=" nil t)
      (sh--assignment-collect)))
  (add-hook 'post-self-insert-hook #'sh--assignment-collect nil t)
  (message "Scanning buffer `%s' for variable assignments...done"
	   (buffer-name)))

(defvar sh-add-buffer)

(defun sh-add-completer (string predicate code)
  "Do completion using `sh-shell-variables', but initialize it first.
This function is designed for use as the \"completion table\",
so it takes three arguments:
  STRING, the current buffer contents;
  PREDICATE, the predicate for filtering possible matches;
  CODE, which says what kind of things to do.
CODE can be nil, t or `lambda'.
nil means to return the best completion of STRING, or nil if there is none.
t means to return a list of all possible completions of STRING.
`lambda' means to return t if STRING is a valid completion as it stands."
  (let ((vars
	 (with-current-buffer sh-add-buffer
	   (or sh-shell-variables-initialized
	       (sh-shell-initialize-variables))
	   (nconc (mapcar (lambda (var)
                            (substring var 0 (string-search "=" var)))
			  process-environment)
		  sh-shell-variables))))
    (complete-with-action code vars string predicate)))

(defun sh-add (var delta)
  "Insert an addition of VAR and prefix DELTA for Bourne (type) shell."
  (interactive
   (let ((sh-add-buffer (current-buffer)))
     (list (completing-read "Variable: " 'sh-add-completer)
	   (prefix-numeric-value current-prefix-arg))))
  (insert (sh-feature '((bash . "$(( ")
			(ksh88 . "$(( ")
			(posix . "$(( ")
			(rc . "`{expr $")
			(sh . "`expr $")
			(zsh . "$[ ")))
	  (sh-remember-variable var)
	  (if (< delta 0) " - " " + ")
	  (number-to-string (abs delta))
	  (sh-feature '((bash . " ))")
			(ksh88 . " ))")
			(posix . " ))")
			(rc . "}")
			(sh . "`")
			(zsh . " ]")))))



(define-skeleton sh-function
  "Insert a function definition.  See `sh-feature'."
  (bash sh-modify ksh88
	3 "() {")
  (ksh88 "name: "
	 "function " str " {" \n
	 > _ \n
	 < "}" \n)
  (rc sh-modify ksh88
      1 "fn ")
  (sh ()
      "() {" \n
      > _ \n
      < "}" \n))



(define-skeleton sh-if
  "Insert an if statement.  See `sh-feature'."
  (csh "condition: "
       "if( " str " ) then" \n
       > _ \n
       ( "other condition, %s: "
	 < "else if( " str " ) then" \n
	 > _ \n)
       < "else" \n
       > _ \n
       resume:
       < "endif" \n)
  (es "condition: "
      > "if { " str " } {" \n
      > _ \n
      ( "other condition, %s: "
	"} { " str " } {" > \n
	> _ \n)
      "} {" > \n
      > _ \n
      resume:
      ?\} > \n)
  (rc "condition: "
      > "if( " str " ) {" \n
      > _ \n
      ( "other condition, %s: "
	"} else if( " str " ) {"  > \n
	> _ \n)
      "} else {" > \n
      > _ \n
      resume:
      ?\} > \n)
  (sh "condition: "
      '(setq input (sh-feature sh-test))
      > "if " str "; then" \n
      > _ \n
      ( "other condition, %s: "
	>  "elif " str "; then" > \n
	> \n)
      "else" > \n
      > \n
      resume:
      "fi" > \n))



(define-skeleton sh-repeat
  "Insert a repeat loop definition.  See `sh-feature'."
  (es nil
      > "forever {" \n
      > _ \n
      ?\} > \n)
  (zsh "factor: "
       > "repeat " str "; do" > \n
       >  \n
       "done" > \n))

;;;(put 'sh-repeat 'menu-enable '(sh-feature sh-repeat))



(define-skeleton sh-select
  "Insert a select statement.  See `sh-feature'."
  (ksh88 "Index variable: "
	 > "select " str " in " _ "; do" \n
	 > ?$ str \n
	 "done" > \n)
  (bash sh-append ksh88))
;;;(put 'sh-select 'menu-enable '(sh-feature sh-select))



(define-skeleton sh-tmp-file
  "Insert code to setup temporary file handling.  See `sh-feature'."
  (bash sh-append ksh88)
  (csh (file-name-nondirectory (buffer-file-name))
       "set tmp = `mktemp -t " str ".XXXXXX`" \n
       "onintr exit" \n _
       (and (goto-char (point-max))
	    (not (bolp))
	    ?\n)
       "exit:\n"
       "rm $tmp* >&" null-device > \n)
  (es (file-name-nondirectory (buffer-file-name))
      > "local( signals = $signals sighup sigint;" \n
      > "tmp = `{ mktemp -t " str ".XXXXXX } ) {" \n
      > "catch @ e {" \n
      > "rm $tmp^* >[2]" null-device \n
      "throw $e" \n
      "} {" > \n
      _ \n
      ?\} > \n
      ?\} > \n)
  (ksh88 sh-modify sh
	 7 "EXIT")
  (rc (file-name-nondirectory (buffer-file-name))
      > "tmp = `{ mktemp -t " str ".XXXXXX }" \n
      "fn sigexit { rm $tmp^* >[2]" null-device " }" \n)
  (sh (file-name-nondirectory (buffer-file-name))
      > "TMP=`mktemp -t " str ".XXXXXX`" \n
      "trap \"rm $TMP* 2>" null-device "\" " ?0 \n))



(define-skeleton sh-until
  "Insert an until loop.  See `sh-feature'."
  (sh "condition: "
      '(setq input (sh-feature sh-test))
      > "until " str "; do" \n
      > _ \n
      "done" > \n))
;;;(put 'sh-until 'menu-enable '(sh-feature sh-until))



(define-skeleton sh-while
  "Insert a while loop.  See `sh-feature'."
  (csh sh-modify sh
       2 ""
       3 "while( "
       5 " )"
       10 '<
       11 "end")
  (es sh-modify sh
      3 "while { "
      5 " } {"
      10 ?\} )
  (rc sh-modify sh
      3 "while( "
      5 " ) {"
      10 ?\} )
  (sh "condition: "
      '(setq input (sh-feature sh-test))
      > "while " str "; do" \n
      > _ \n
      "done" > \n))



(define-skeleton sh-while-getopts
  "Insert a while getopts loop.  See `sh-feature'.
Prompts for an options string which consists of letters for each recognized
option followed by a colon `:' if the option accepts an argument."
  (bash sh-modify sh
	18 "${0##*/}")
  (csh nil
       "while( 1 )" \n
       > "switch( \"$1\" )" \n
       '(setq input '("- x" . 2))
       > >
       ( "option, %s: "
	 < "case " '(eval str)
	 '(if (string-match " +" str)
	      (setq v1 (substring str (match-end 0))
		    str (substring str 0 (match-beginning 0)))
	    (setq v1 nil))
	 str ?: \n
	 > "set " v1 & " = $2" | -4 & _ \n
	 (if v1 "shift") & \n
	 "breaksw" \n)
       < "case --:" \n
       > "shift" \n
       < "default:" \n
       > "break" \n
       resume:
       < < "endsw" \n
       "shift" \n
       < "end" \n)
  (ksh88 sh-modify sh
	 16 "print"
	 18 "${0##*/}"
	 37 "OPTIND-1")
  (posix sh-modify sh
	 18 "$(basename $0)")
  (sh "optstring: "
      > "while getopts :" str " OPT; do" \n
      > "case $OPT in" \n
      '(setq v1 (append (vconcat str) nil))
      ( (prog1 (if v1 (char-to-string (car v1)))
	  (if (eq (nth 1 v1) ?:)
	      (setq v1 (nthcdr 2 v1)
		    v2 "\"$OPTARG\"")
	    (setq v1 (cdr v1)
		  v2 nil)))
	> str "|+" str sh-non-closing-paren \n
	> _ v2 \n
	> ";;" \n)
      > "*" sh-non-closing-paren \n
      > "echo" " \"usage: " "`basename $0`"
      " [+-" '(setq v1 (point)) str
      '(save-excursion
	 (while (search-backward ":" v1 t)
	   (replace-match " ARG] [+-" t t)))
      (if (eq (preceding-char) ?-) -5)
      (if (and (sequencep v1) (length v1)) "] " "} ")
      "[--] ARGS...\"" \n
      "exit 2"  > \n
      "esac" >
      \n "done"
      > \n
      "shift " (sh-add "OPTIND" -1) \n
      "OPTIND=1" \n))



(put 'sh-assignment 'delete-selection t)
(defun sh-assignment (arg)
  "Remember preceding identifier for future completion and do self-insert."
  (declare (obsolete nil "27.1"))
  (interactive "p")
  (self-insert-command arg)
  (sh--assignment-collect))

(defun sh--assignment-collect ()
  (sh-remember-variable
   (when (eq ?= (char-before))
     (save-excursion
       (if (re-search-forward (sh-feature sh-assignment-regexp)
			      (prog1 (point)
			        (beginning-of-line 1))
			      t)
	   (match-string 1))))))


(defun sh--maybe-here-document ()
  (when (and (looking-back "[^<]<<[ E-]" (line-beginning-position))
             (save-excursion
	       (backward-char 2)
               (not
                (or (sh-quoted-p)
                    (sh--inside-noncommand-expression (point)))))
             (not (nth 8 (syntax-ppss))))
    (let ((tabs (if (string-match "\\`-" sh-here-document-word)
                    (make-string (/ (current-indentation) tab-width) ?\t)
                  ""))
          (delim (replace-regexp-in-string "['\"]" ""
                                           sh-here-document-word)))
      ;; If we're at <<-, we don't want to delete the previous char.
      (unless (= (preceding-char) ?-)
        (delete-char -1))
      (insert sh-here-document-word)
      (or (eolp) (looking-at "[ \t]") (insert ?\s))
      (end-of-line 1)
      (while
	  (sh-quoted-p)
	(end-of-line 2))
      (insert ?\n tabs)
      (save-excursion
        (insert ?\n tabs (replace-regexp-in-string
                          "\\`-?[ \t]*" "" delim))))))

(define-minor-mode sh-electric-here-document-mode
  "Make << insert a here document skeleton."
  :lighter nil
  (if sh-electric-here-document-mode
      (add-hook 'post-self-insert-hook #'sh--maybe-here-document nil t)
    (remove-hook 'post-self-insert-hook #'sh--maybe-here-document t)))
\f
;; various other commands

(defun sh-beginning-of-command ()
  ;; FIXME: Redefine using SMIE.
  "Move point to successive beginnings of commands."
  (interactive)
  (if (re-search-backward sh-beginning-of-command nil t)
      (goto-char (match-beginning 2))))

(defun sh-end-of-command ()
  ;; FIXME: Redefine using SMIE.
  "Move point to successive ends of commands."
  (interactive)
  (if (re-search-forward sh-end-of-command nil t)
      (goto-char (match-end 1))))

;; Backslashification.  Stolen from make-mode.el.

(defun sh-backslash-region (from to delete-flag)
  "Insert, align, or delete end-of-line backslashes on the lines in the region.
With no argument, inserts backslashes and aligns existing backslashes.
With an argument, deletes the backslashes.

This function does not modify the last line of the region if the region ends
right at the start of the following line; it does not modify blank lines
at the start of the region.  So you can put the region around an entire
shell command and conveniently use this command."
  (interactive "r\nP")
  (save-excursion
    (goto-char from)
    (let ((column sh-backslash-column)
          (endmark (make-marker)))
      (move-marker endmark to)
      ;; Compute the smallest column number past the ends of all the lines.
      (if sh-backslash-align
	  (progn
	    (if (not delete-flag)
		(while (< (point) to)
		  (end-of-line)
		  (if (= (preceding-char) ?\\)
		      (progn (forward-char -1)
			     (skip-chars-backward " \t")))
		  (setq column (max column (1+ (current-column))))
		  (forward-line 1)))
	    ;; Adjust upward to a tab column, if that doesn't push
	    ;; past the margin.
	    (if (> (% column tab-width) 0)
		(let ((adjusted (* (/ (+ column tab-width -1) tab-width)
				   tab-width)))
		  (if (< adjusted (window-width))
		      (setq column adjusted))))))
      ;; Don't modify blank lines at start of region.
      (goto-char from)
      (while (and (< (point) endmark) (eolp))
        (forward-line 1))
      ;; Add or remove backslashes on all the lines.
      (while (and (< (point) endmark)
                  ;; Don't backslashify the last line
                  ;; if the region ends right at the start of the next line.
                  (save-excursion
                    (forward-line 1)
                    (< (point) endmark)))
        (if (not delete-flag)
            (sh-append-backslash column)
          (sh-delete-backslash))
        (forward-line 1))
      (move-marker endmark nil))))

(defun sh-append-backslash (column)
  (end-of-line)
  ;; Note that "\\\\" is needed to get one backslash.
  (if (= (preceding-char) ?\\)
      (progn (forward-char -1)
             (delete-horizontal-space)
             (indent-to column (if sh-backslash-align nil 1)))
    (indent-to column (if sh-backslash-align nil 1))
    (insert "\\")))

(defun sh-delete-backslash ()
  (end-of-line)
  (or (bolp)
      (progn
 	(forward-char -1)
 	(if (looking-at "\\\\")
 	    (delete-region (1+ (point))
 			   (progn (skip-chars-backward " \t") (point)))))))

;;; Flymake backend

(defcustom sh-shellcheck-program "shellcheck"
  "Name of the shellcheck executable."
  :type 'string
  :version "29.1")

(defcustom sh-shellcheck-arguments nil
  "Additional arguments to the shellcheck program."
  :type '(repeat string)
  :version "29.1")

(defvar-local sh--shellcheck-process nil)

(defalias 'sh--json-read
  (if (fboundp 'json-parse-buffer)
      (lambda () (json-parse-buffer :object-type 'alist))
    (require 'json)
    'json-read))

(defun sh-shellcheck-flymake (report-fn &rest _args)
  "Flymake backend using the shellcheck program.
Takes a Flymake callback REPORT-FN as argument, as expected of a
member of `flymake-diagnostic-functions'."
  (when (process-live-p sh--shellcheck-process)
    (kill-process sh--shellcheck-process))
  (let* ((source (current-buffer))
         (dialect (named-let recur ((s sh-shell))
                    (pcase s
                      ((or 'bash 'dash 'sh) (symbol-name s))
                      ('ksh88 "ksh")
                      ((guard s)
                       (recur (alist-get s sh-ancestor-alist))))))
         (sentinel
          (lambda (proc _event)
            (when (memq (process-status proc) '(exit signal))
              (unwind-protect
                  (if (with-current-buffer source
                        (not (eq proc sh--shellcheck-process)))
                      (flymake-log :warning "Canceling obsolete check %s" proc)
                    (with-current-buffer (process-buffer proc)
                      (goto-char (point-min))
                      (thread-last
                        (sh--json-read)
                        (alist-get 'comments)
                        (seq-filter
                         (lambda (item)
                           (let-alist item (string= .file "-"))))
                        (mapcar
                         (lambda (item)
                           (let-alist item
                             (flymake-make-diagnostic
                              source
                              (cons .line .column)
                              (unless (and (eq .line .endLine)
                                           (eq .column .endColumn))
                                (cons .endLine .endColumn))
                              (pcase .level
                                ("error" :error)
                                ("warning" :warning)
                                (_ :note))
                              (format "SC%s: %s" .code .message)))))
                        (funcall report-fn))))
                (kill-buffer (process-buffer proc)))))))
    (unless dialect
      (error "`sh-shellcheck-flymake' is not suitable for shell type `%s'"
             sh-shell))
    (setq sh--shellcheck-process
          (make-process
           :name "shellcheck" :noquery t :connection-type 'pipe
           :buffer (generate-new-buffer " *flymake-shellcheck*")
           :command `(,sh-shellcheck-program
                      "--format=json1"
                      "-s" ,dialect
                      ,@sh-shellcheck-arguments
                      "-")
           :sentinel sentinel))
    (save-restriction
      (widen)
      (process-send-region sh--shellcheck-process (point-min) (point-max))
      (process-send-eof sh--shellcheck-process))))

;;; Tree-sitter font-lock

(defvar sh-mode--treesit-operators
  '("|" "|&" "||" "&&" ">" ">>" "<" "<<" "<<-" "<<<" "==" "!=" ";&" ";;&")
  "A list of `sh-mode' operators to fontify.")

(defvar sh-mode--treesit-keywords
  '("case" "do" "done" "elif" "else" "esac" "export" "fi" "for"
    "function" "if" "in" "unset" "while" "then")
  "Minimal list of keywords that belong to tree-sitter-bash's grammar.

Some reserved words are not recognize to keep the grammar
simpler.  Those are identified with regex-based filtered queries.

\(See `sh-mode--treesit-other-keywords' and
`sh-mode--treesit-settings').")

(defun sh-mode--treesit-other-keywords ()
  "Return a list `others' of key/reserved words.
These words are fontified with regex-based queries as they are
not part of tree-sitter-bash's grammar.

See `sh-mode--treesit-other-keywords' and
`sh-mode--treesit-settings')."
  (let ((minimal sh-mode--treesit-keywords)
        (all (append (sh-feature sh-leading-keywords)
                     (sh-feature sh-other-keywords)))
        (others))
    (dolist (keyword all others)
      (if (not (member keyword minimal))
          (setq others (cons keyword others))))))

(defvar sh-mode--treesit-declaration-commands
  '("declare" "typeset" "export" "readonly" "local")
  "Keywords in declaration commands.")

(defvar sh-mode--treesit-settings
  (treesit-font-lock-rules
   :feature 'comment
   :language 'bash
   '((comment) @font-lock-comment-face)

   :feature 'function
   :language 'bash
   '((function_definition name: (word) @font-lock-function-name-face))

   :feature 'string
   :language 'bash
   '([(string) (raw_string)] @font-lock-string-face)

   :feature 'string-interpolation
   :language 'bash
   :override t
   '((command_substitution) @sh-quoted-exec
     (string (expansion (variable_name) @font-lock-variable-use-face)))

   :feature 'heredoc
   :language 'bash
   '([(heredoc_start) (heredoc_body)] @sh-heredoc)

   :feature 'variable
   :language 'bash
   '((variable_name) @font-lock-variable-name-face)

   :feature 'keyword
   :language 'bash
   `(;; keywords
     [ ,@sh-mode--treesit-keywords ] @font-lock-keyword-face
     ;; reserved words
     (command_name
      ((word) @font-lock-keyword-face
       (:match
        ,(rx-to-string
          `(seq bol
                (or ,@(sh-mode--treesit-other-keywords))
                eol))
        @font-lock-keyword-face))))

   :feature 'command
   :language 'bash
   `(;; function/non-builtin command calls
     (command_name (word) @font-lock-function-name-face)
     ;; builtin commands
     (command_name
      ((word) @font-lock-builtin-face
       (:match ,(let ((builtins
                       (sh-feature sh-builtins)))
                  (rx-to-string
                   `(seq bol
                         (or ,@builtins)
                         eol)))
               @font-lock-builtin-face))))

   :feature 'declaration-command
   :language 'bash
   `([,@sh-mode--treesit-declaration-commands] @font-lock-keyword-face)

   :feature 'constant
   :language 'bash
   '((case_item value: (word) @font-lock-constant-face)
     (file_descriptor) @font-lock-constant-face)

   :feature 'operator
   :language 'bash
   `([,@sh-mode--treesit-operators] @font-lock-operator-face)

   :feature 'builtin-variable
   :language 'bash
   `(((special_variable_name) @font-lock-builtin-face
      (:match ,(let ((builtin-vars (sh-feature sh-variables)))
                 (rx-to-string
                  `(seq bol
                        (or ,@builtin-vars)
                        eol)))
              @font-lock-builtin-face)))

   :feature 'number
   :language 'bash
   `(((word) @font-lock-number-face
      (:match "\\`[0-9]+\\'" @font-lock-number-face)))

   :feature 'bracket
   :language 'bash
   '((["(" ")" "((" "))" "[" "]" "[[" "]]" "{" "}"]) @font-lock-bracket-face)

   :feature 'delimiter
   :language 'bash
   '(([";" ";;"]) @font-lock-delimiter-face)

   :feature 'misc-punctuation
   :language 'bash
   '((["$"]) @font-lock-misc-punctuation-face))
  "Tree-sitter font-lock settings for `sh-mode'.")

(provide 'sh-script)
;;; sh-script.el ends here

debug log:

solving 9bc1f4dcfdc ...
found 9bc1f4dcfdc in https://git.savannah.gnu.org/cgit/emacs.git

(*) 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).