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
| | GNU Emacs NEWS -- history of user-visible changes.
Copyright (C) 2022-2024 Free Software Foundation, Inc.
See the end of the file for license conditions.
Please send Emacs bug reports to 'bug-gnu-emacs@gnu.org'.
If possible, use 'M-x report-emacs-bug'.
This file is about changes in Emacs version 30.
See file HISTORY for a list of GNU Emacs versions and release dates.
See files NEWS.29, NEWS.28, ..., NEWS.18, and NEWS.1-17 for changes
in older Emacs versions.
You can narrow news to a specific version by calling 'view-emacs-news'
with a prefix argument or by typing 'C-u C-h C-n'.
\f
* Installation Changes in Emacs 30.1
+++
** Emacs has been ported to the Android operating system.
This requires Emacs to be compiled on another computer. The Android
NDK, SDK, and a suitable Java compiler must also be installed.
See the file 'java/INSTALL' for more details.
---
** Native compilation is now enabled by default.
'configure' will enable the Emacs Lisp native compiler, so long as
libgccjit is present and functional on the system. To disable native
compilation, configure Emacs with the option:
./configure --with-native-compilation=no
---
** Emacs now defaults to ossaudio library for sound on NetBSD and OpenBSD.
Previously configure used ALSA libraries if installed on the
system when configured '--with-sound=yes' (which is the default), with
fallback to libossaudio. The libossaudio library included with the
base system is now used even if ALSA is found to avoid relying on
external packages and to resolve potential incompatibilities between
Linux and BSD versions of ALSA. Use '--with-sound=alsa' to build with
ALSA on these operating systems instead.
\f
* Startup Changes in Emacs 30.1
** On GNU/Linux, Emacs is now the default application for 'org-protocol'.
Org mode provides a way to quickly capture bookmarks, notes, and links
using 'emacsclient':
emacsclient "org-protocol://store-link?url=URL&title=TITLE"
Previously, users had to manually configure their GNU/Linux desktop
environment to open 'org-protocol' links in Emacs. These links should
now open in Emacs automatically, as the "emacsclient.desktop" file now
arranges for Emacs to be the default application for the 'org-protocol'
URI scheme. See the Org mode manual, Info node "(org) Protocols" for
more details.
\f
* Incompatible Changes in Emacs 30.1
** Tree-Sitter modes are now declared as submodes of the non-TS modes.
In order to help the use of those Tree-Sitter modes, they are now
declared to have the corresponding non-Tree-Sitter mode as an
additional parent.
This way, things like `.dir-locals.el` settings, and YASnippet
collections of snippets automatically apply to the new Tree-Sitter modes.
Note that those modes still do not inherit from the non-TS mode, so
configuration settings installed via mode hooks are not affected.
+++
** URL now never sends user email addresses in HTTP requests.
Emacs never sent email addresses by default, but it used to be
possible to customize 'url-privacy-level' so that the users email
address was sent along in HTTP requests. This feature has now been
removed, as it was considered more dangerous than useful. RFC 9110
(§ 10.1.2) also recommends against it. The user option
'url-personal-mail-address' is now also obsolete.
To send an email address in the header of individual HTTP requests,
see the variable 'url-request-extra-headers'.
+++
** 'completion-auto-help' now affects 'icomplete-in-buffer'.
Previously, 'completion-auto-help' mostly affected only minibuffer
completion. Now, if 'completion-auto-help' has the value 'lazy', then
Icomplete's in-buffer display of possible completions will only appear
after the 'completion-at-point' command has been invoked twice, and if
'completion-auto-help' is nil, then Icomplete's in-buffer display is
completely suppressed. Thus, if you use 'icomplete-in-buffer', ensure
'completion-auto-help' is not customized to 'lazy' or nil.
+++
** The "*Completions*" buffer now always accompanies 'icomplete-in-buffer'.
Previously, it was not consistent whether the "*Completions*" buffer would
appear when using 'icomplete-in-buffer'. Now the "*Completions*" buffer
and Icomplete's in-buffer display of possible completions always
appear together. If you would prefer to see only Icomplete's
in-buffer display, and not the "*Completions*" buffer, you can add this
to your init:
(advice-add 'completion-at-point :after #'minibuffer-hide-completions)
\f
* Changes in Emacs 30.1
** 'advice-remove' is now an interactive command.
When called interactively, 'advice-remove' now prompts for an advised
function to the advice to remove.
** Emacs now supports Unicode Standard version 15.1.
** Network Security Manager
+++
*** The Network Security Manager now warns about 3DES by default.
This cypher is no longer recommended owing to a major vulnerability
disclosed in 2016, and its small 112 bit key size. Emacs now warns
about its use also when 'network-security-level' is set to 'medium'
(the default). See 'network-security-protocol-checks'.
---
*** The Network Security Manager now warns about <2048 bits in DH key exchange.
Emacs used to warn for Diffie-Hellman key exchanges with prime numbers
smaller than 1024 bits. Since more servers now support it, this
number has been bumped to 2048 bits.
** Help
*** 'describe-function' shows function inferred type when available.
For native compiled Lisp functions 'describe-function' prints (after
the signature) the automatically inferred function type as well.
---
*** New user option 'describe-bindings-outline-rules'.
This user option controls outline visibility in the output buffer of
'describe-bindings' when 'describe-bindings-outline' is non-nil.
---
*** 'C-h m' ('describe-mode') uses outlining by default.
Set 'describe-mode-outline' to nil to get back the old behavior.
** Outline Mode
+++
*** 'outline-minor-mode' is supported in tree-sitter major modes.
It can be used in all tree-sitter major modes that set either the
variable 'treesit-simple-imenu-settings' or 'treesit-outline-predicate'.
** X selection requests are now handled much faster and asynchronously.
This means it should be less necessary to disable the likes of
'select-active-regions' when Emacs is running over a slow network
connection.
** Emacs now updates invisible frames that are made visible by a compositor.
If an invisible or an iconified frame is shown to the user by the
compositing manager, Emacs will now redisplay such a frame even though
'frame-visible-p' returns nil or 'icon' for it. This can happen, for
example, as part of preview for iconified frames.
---
** New user option 'menu-bar-close-window'.
When non-nil, selecting "Close" from the "File" menu or clicking
"Close" in the tool bar will result in the current window being
closed, if possible.
+++
** 'write-region-inhibit-fsync' now defaults to t in interactive mode,
as it has in batch mode since Emacs 24.
+++
** New user option 'remote-file-name-inhibit-delete-by-moving-to-trash'.
When non-nil, this option suppresses moving remote files to the local
trash when deleting. Default is nil.
---
** New user option 'remote-file-name-inhibit-auto-save'.
If this user option is non-nil, 'auto-save-mode' will not auto-save
remote buffers. The default is nil.
+++
** New user option 'remote-file-name-access-timeout'.
When a positive number, this option limits the call of 'access-file'
for remote files to this number of seconds. Default is nil.
+++
** New user option 'yes-or-no-prompt'.
This allows the user to customize the prompt that is appended by
'yes-or-no-p' when asking questions. The default value is
"(yes or no) ".
---
** New face 'display-time-date-and-time'.
This is used for displaying the time and date components of
'display-time-mode'.
---
** New icon images for general use.
Several symbolic icons are added to "etc/images/symbols", including
plus, minus, check-mark, start, etc.
+++
** Tool bars can now be placed on the bottom on more systems.
The 'tool-bar-position' frame parameter can be set to 'bottom' on all
window systems other than Nextstep.
+++
** New global minor mode 'modifier-bar-mode'.
When this minor mode is enabled, buttons representing modifier keys
are displayed along the tool bar.
+++
** "d" in the mode line now indicates that the window is dedicated.
Windows have always been able to be dedicated to a specific buffer;
see 'window-dedicated-p'. Now the mode line indicates the dedicated
status of a window, with "d" appearing in the mode line if a window is
dedicated and "D" if the window is strongly dedicated. This indicator
appears before the buffer name, and after the buffer modification and
remote buffer indicators (usually "---" together).
+++
** New command 'toggle-window-dedicated'.
This makes it easy to interactively mark a specific window as
dedicated, so it won't be reused by 'display-buffer'. This can be
useful for complicated window setups. It is bound to 'C-x w d'
globally.
---
** New user option 'uniquify-dirname-transform'.
This can be used to customize how buffer names are uniquified, by
making arbitrary transforms on the buffer's directory name (whose
components are used to uniquify buffer names when they clash). You
can use this to distinguish between buffers visiting files with the
same base name that belong to different projects by using the provided
transform function 'project-uniquify-dirname-transform'.
** 'insert-directory-program' is now a user option.
On *BSD and macOS systems, this user option now defaults to the "gls"
executable, if it exists. This should remove the need to change its
value when installing GNU coreutils using something like ports or
Homebrew.
+++
** cl-print
+++
*** You can expand the "..." truncation everywhere.
The code that allowed "..." to be expanded in the "*Backtrace*" buffer
should now work anywhere the data is generated by 'cl-print'.
+++
*** The 'backtrace-ellipsis' button is replaced by 'cl-print-ellipsis'.
+++
*** hash-tables' contents can be expanded via the ellipsis.
+++
*** Modes can control the expansion via 'cl-print-expand-ellipsis-function'.
+++
*** New setting 'raw' for 'cl-print-compiled'.
This setting causes byte-compiled functions to be printed in full by
'prin1'. A button on this output can be activated to disassemble the
function.
+++
*** There is a new chapter in the CL manual documenting cl-print.el.
See the Info node "(cl) Printing".
** Modeline elements can now be right-aligned.
Anything following the symbol 'mode-line-format-right-align' in
'mode-line-format' will be right-aligned. Exactly where it is
right-aligned to is controlled by the new user option
'mode-line-right-align-edge'.
** Windows
*** New action alist entry 'post-command-select-window' for 'display-buffer'.
It specifies whether the window of the displayed buffer should be
selected or deselected at the end of executing the current command.
+++
*** New variable 'window-restore-killed-buffer-windows'.
It specifies how 'set-window-configuration' and 'window-state-put'
should proceed with windows whose buffer was killed after the
corresponding configuration or state was recorded.
** Tab Bars and Tab Lines
---
*** New user option 'tab-bar-select-restore-windows'.
It defines what to do with windows whose buffer was killed
since the tab was last selected. By default it displays
a placeholder buffer that provides information about the name
of the killed buffer that was displayed in that window.
---
*** New user option 'tab-bar-tab-name-format-functions'.
It can be used to add, remove and reorder functions that change
the appearance of every tab on the tab bar.
---
*** New hook 'tab-bar-tab-post-select-functions'.
+++
** New optional argument for modifying directory-local variables.
The commands 'add-dir-local-variable', 'delete-dir-local-variable' and
'copy-file-locals-to-dir-locals' now take an optional prefix argument,
to enter the file you want to modify.
** Miscellaneous
---
*** New face 'appt-notification' for 'appt-display-mode-line'.
It can be used to customize the look of the appointment notification
displayed on the mode line when 'appt-display-mode-line' is non-nil.
---
*** Emacs now recognizes shebang lines that pass '-S'/'--split-string' to 'env'.
When visiting a script that invokes 'env -S INTERPRETER ARGS...' in
its shebang line, Emacs will now skip over 'env -S' and deduce the
major mode based on the interpreter after 'env -S'.
** Emacs Server and Client
---
*** 'server-eval-args-left' can be used to pop and eval subsequent args.
When '--eval' is passed to emacsclient and Emacs is evaluating each
argument, this variable is set to those arguments not yet evaluated.
It can be used to 'pop' arguments and process them by the function
called in the '--eval' expression, which is useful when those
arguments contain arbitrary characters that otherwise might require
elaborate and error-prone escaping (to protect them from the shell).
+++
** 'recover-file' can show diffs between auto save file and current file.
When answering the prompt with "diff" or "=", it now shows the diffs
between the auto save file and the current file.
---
** 'ffap-lax-url' now defaults to nil.
Previously, it was set to t but this broke remote file name detection.
+++
** Multi-character key echo now ends with a suggestion to use Help.
Customize 'echo-keystrokes-help' to nil to prevent that.
+++
** 'read-passwd' can toggle the visibility of passwords.
Use 'TAB' in the minibuffer to show or hide the password. Likewise,
there is an icon on the mode-line, which toggles the visibility of the
password when clicking with 'mouse-1'.
\f
* Editing Changes in Emacs 30.1
+++
** New minor mode 'visual-wrap-prefix-mode'.
When enabled, continuation lines displayed for a wrapped long line
will receive a 'wrap-prefix' automatically computed from the line's
surrounding context, such that continuation lines are indented on
display as if they were filled with 'M-q' or similar. Unlike 'M-q',
the indentation only happens on display, and doesn't change the buffer
text in any way. The global minor mode
'global-visual-wrap-prefix-mode' enables this minor mode in all
buffers.
(This minor mode is the 'adaptive-wrap' ELPA package renamed and
lightly edited for inclusion in Emacs.)
+++
** New user option 'gud-highlight-current-line'.
When enabled, Gud will visually emphasize the line being executed upon
pauses in the debugee's execution, such as those occasioned by
breakpoints being hit.
---
** New global minor mode 'kill-ring-deindent-mode'.
When enabled, text being saved to the kill ring will be de-indented by
the column number at its start. For example, saving the entire
function call within:
foo ()
{
long_function_with_several_arguments (argument_1_compute (),
argument_2_compute (),
argument_3_compute ());
}
will save:
long_function_with_several_arguments (argument_1_compute (),
argument_2_compute (),
argument_3_compute ())
to the kill ring, omitting the two columns of extra indentation that
would otherwise be present in the second and third lines of the
function call.
+++
** Emacs now has better support for touchscreen devices.
Many touch screen gestures are now implemented and translated into
mouse or gesture events, and support for tapping tool bar buttons and
opening menus has been written. Countless packages, such as Dired and
Custom have been adjusted to better understand touch screen input.
---
** On X, Emacs now supports input methods which perform "string conversion".
This means an input method can now ask Emacs to delete text
surrounding point and replace it with something else, as well as query
Emacs for surrounding text. If your input method allows you to "undo"
mistaken compositions, this will now work as well.
---
** New command 'kill-matching-buffers-no-ask'.
This works like 'kill-matching-buffers', but without asking for
confirmation.
---
** New user option 'duplicate-region-final-position'.
It controls the placement of point and the region after duplicating a
region with 'duplicate-dwim'.
+++
** New user option 'mouse-prefer-closest-glyph'.
When enabled, clicking or dragging with the mouse will put the point
or start the drag in front of the buffer position corresponding to the
glyph with the closest X coordinate to the click or start of the drag.
In other words, if the mouse pointer is in the right half of a glyph,
point will be put after the buffer position corresponding to that glyph,
whereas if the mouse pointer is in the left half of a glyph, point
will be put in front the buffer position corresponding to that glyph.
By default this is disabled.
** Internationalization
---
*** Users in CJK locales can control width of some non-CJK characters.
Some characters are considered by Unicode as "ambiguous" with respect
to their display width: either "full-width" (i.e. taking 2 columns on
display) or "narrow" (taking 1 column). The actual width depends on
the fonts used for these characters by Emacs or (for text-mode frames)
by the terminal emulator. Traditionally, font sets in CJK locales
were set up so as to display these characters as full-width, and thus
Emacs modified the char-width table in those locales to follow suit.
Lately, the tendency is to display these characters as narrow. The
new user option 'cjk-ambiguous-chars-are-wide' allows users to control
whether Emacs considers these characters as full-width (the default)
or narrow (if the variable is customized to the nil value).
This setting affects the results of 'string-width' and similar
functions in CJK locales.
---
*** New input methods for the Urdu, Pashto, and Sindhi languages.
These languages are spoken in Pakistan and Afghanistan.
---
*** New input method "english-colemak".
This input method supports the Colemak keyboard layout.
*** Additional 'C-x 8' key translations for "æ" and "Æ".
These characters can now be input with 'C-x 8 a e' and 'C-x 8 A E',
respectively, in addition to the existing translations 'C-x 8 / e' and
'C-x 8 / E'.
\f
* Changes in Specialized Modes and Packages in Emacs 30.1
---
** Titdic-cnv
Most of the variables and functions in the file have been renamed to
make sure they all use a 'tit-' namespace prefix.
---
** Trace
In batch mode, tracing now sends the trace to stdout.
+++
** Mwheel
The 'wheel-up/down/left/right' events are now bound unconditionally,
and the 'mouse-wheel-up/down/left/right-event' variables are thus used
only to specify the 'mouse-4/5/6/7' events generated by older
configurations such as X11 when the X server does not support at least
version 2.1 of the X Input Extension, and 'xterm-mouse-mode'.
** 'xterm-mouse-mode'
This mode now emits 'wheel-up/down/right/left' events instead of
'mouse-4/5/6/7' events for the mouse wheel.
It uses the 'mouse-wheel-up/down/left/right-event'
variables to decide which button maps to which wheel event (if any).
** Info
---
*** New user option 'Info-url-alist'.
This user option associates manual names with URLs. It affects the
'Info-goto-node-web' command. By default, associations for all
Emacs-included manuals are set. Further associations can be added for
arbitrary Info manuals.
*** Emacs can now display Info manuals compressed with 'lzip'.
This requires the 'lzip' program to be installed on your system.
+++
** New command 'lldb'.
Run the LLDB debugger, analogous to the 'gud-gdb' command.
** gdb-mi
---
*** Variable order and truncation can now be configured in 'gdb-many-windows'.
The new user option 'gdb-locals-table-row-config' allows users to
configure the order and max length of various properties in the local
variables buffer when using 'gdb-many-windows'.
By default, this user option is set to write the properties in the order:
name, type and value, where the name and type are truncated to 20
characters, and the value is truncated according to the value of
'gdb-locals-value-limit'.
If you want to get back the old behavior, set the user option to the value
(setopt gdb-locals-table-row-config
`((type . 0) (name . 0) (value . ,gdb-locals-value-limit)))
---
*** New user option 'gdb-display-io-buffer'.
If this is nil, 'M-x gdb' will neither create nor display a separate
buffer for the I/O of the program being debugged, but will instead
redirect the program's interaction to the GDB execution buffer. The
default is t, to preserve previous behavior.
** Grep
*** New user option 'grep-use-headings'.
When non-nil, the output of Grep is split into sections, one for each
file, instead of having file names prefixed to each line. It is
equivalent to the "--heading" option of some tools such as 'git grep'
and 'rg'. The headings are displayed using the new 'grep-heading'
face.
** Compilation mode
---
*** The 'omake' matching rule is now disabled by default.
This is because it partly acts by modifying other rules which may
occasionally be surprising. It can be re-enabled by adding 'omake' to
'compilation-error-regexp-alist'.
*** Lua errors and stack traces are now recognized.
Compilation mode now recognizes Lua language errors and stack traces.
Every Lua error is recognized as a compilation error, and every Lua
stack frame is recognized as a compilation info.
** Project
+++
*** New user option 'project-mode-line'.
When non-nil, display the name of the current project on the mode
line. Clicking 'mouse-1' on the project name pops up the project
menu. The default value is nil.
*** New user option 'project-file-history-behavior'.
Customizing it to 'relativize' makes commands like 'project-find-file'
and 'project-find-dir' display previous history entries relative to
the current project.
*** New user option 'project-key-prompt-style'.
The look of the key prompt in the project switcher has been changed
slightly. To get the previous one, set this option to 'brackets'.
*** 'project-try-vc' tries harder to find the responsible VCS.
When 'project-vc-extra-root-markers' is non-nil, and causes a
subdirectory project to be detected which is not a VCS root, we now
additionally traverse the parent directories until a VCS root is found
(if any), so that the ignore rules for that repository are used, and
the file listing's performance is still optimized.
*** New commands 'project-any-command' and 'project-prefix-or-any-command'.
The former is now bound to 'C-x p o' by default.
The latter is designed primarily for use as a value of
'project-switch-commands'. If instead of a short menu you prefer to
have access to all keys defined inside 'project-prefix-map', as well
as global bindings (to run other commands inside the project root),
you can add this to your init script:
(setopt project-switch-commands #'project-prefix-or-any-command)
** VC
---
*** Log-Edit buffers now display a tool bar.
This tool bar contains items for committing log entries and editing or
generating log entries, among other editing operations.
---
*** New user option 'vc-git-shortlog-switches'.
This is a string or a list of strings that specifies the Git log
switches for shortlogs, such as the one produced by 'C-x v L'.
'vc-git-log-switches' is no longer used for shortlogs.
---
*** New value 'no-backend' for user option 'vc-display-status'.
With this value only the revision number is displayed on the mode-line.
---
*** Obsolete command 'vc-switch-backend' re-added as 'vc-change-backend'.
The command was previously obsoleted and unbound in Emacs 28.
*** Support for viewing VC change history across renames.
When a fileset's VC change history ('C-x v l') ends at a rename, we
now print the old name(s) and a button which jumps to their history.
Git and Hg are supported. Naturally, 'vc-git-print-log-follow' should
be nil for this to work (or '--follow' should not be in
'vc-hg-print-log-switches', in Hg's case). Unlike when the '--follow'
switch is used, commands to see the diff of the old revision ('d'),
check out an old file version ('f') or annotate it right away ('a'),
also work on revisions which precede renames.
---
*** 'vc-annotate' now abbreviates the Git revision in the buffer name.
When using the Git backend, 'vc-annotate' will use an abbreviated
revision identifier in its buffer name. To restore the previous
behavior, set 'vc-annotate-use-short-revision' to nil.
*** New option 'vc-git-file-name-changes-switches'.
It allows tweaking the thresholds for rename and copy detection.
** Diff mode
---
*** New user option 'diff-refine-nonmodified'.
When this is non-nil, 'diff-refine' will highlight lines that were added
or removed in their entirety (as opposed to modified lines, where some
parts of the line were modified), using the same faces as for
highlighting the words added and removed within modified lines. The
default value is nil.
+++
*** 'diff-ignore-whitespace-hunk' can now be applied to all hunks.
When called with a non-nil prefix argument,
'diff-ignore-whitespace-hunk' now iterates over all the hunks in the
current diff, regenerating them without whitespace changes.
+++
*** New user option 'diff-ignore-whitespace-switches'.
This allows changing which type of whitespace changes are ignored when
regenerating hunks with 'diff-ignore-whitespace-hunk'. Defaults to
the previously hard-coded "-b".
*** New command 'diff-apply-buffer' bound to 'C-c RET a'.
It applies the diff in the entire diff buffer and
saves all modified file buffers.
** Isearch and Replace
*** New command 'replace-regexp-as-diff'.
It reads a regexp to search for and a string to replace with, then
displays a buffer with replacements as diffs. After reviewing the
changes in the output buffer you can apply the replacements as
a patch to the current file buffer. There are also new commands
'multi-file-replace-regexp-as-diff' that shows as diffs replacements
in a list of specified files, and 'dired-do-replace-regexp-as-diff'
that shows as diffs replacements in the marked files in Dired.
** Dired
---
*** New user option 'dired-movement-style'.
When non-nil, make 'dired-next-line', 'dired-previous-line',
'dired-next-dirline', 'dired-prev-dirline' skip empty lines.
It also controls how to move point when encountering a boundary
(e.g., if every line is visible, invoking 'dired-next-line' at
the last line will move to the first line). The default is nil.
*** New user option 'dired-filename-display-length'.
It is an integer representing the maximum display length of filenames.
The middle part of a filename whose length exceeds the restriction is
hidden and an ellipsis is displayed instead. A value of 'window'
means using the right edge of window as the display restriction. The
default is nil.
*** New user option 'shell-command-guess-functions'.
It defines how to populate a list of commands available
for 'M-!', 'M-&', '!', '&' and the context menu "Open With"
based on marked files in Dired. Possible backends are
'dired-guess-default', MIME types, XDG configuration
and a universal command such as "open" or "start"
that delegates to the OS.
*** New command 'dired-do-open'.
This command is bound to "Open" in the context menu; it "opens" the
marked or clicked on files according to the OS conventions. For
example, on systems supporting XDG, this runs 'xdg-open' on the
files.
+++
*** 'dired-listing-switches' handles connection-local values if exist.
This allows to customize different switches for different remote machines.
** Registers
+++
*** New mode of prompting for register names and showing preview.
The new user option 'register-use-preview' can be customized to the
value t or insist to request a different user interface of prompting for
register names and previewing the registers: Emacs will require
confirmation for overwriting the value of a register, and will show
the preview of registers without delay. You can also customize this
new option to disable the preview completely.
The default value of 'register-use-preview' preserves the behavior of
Emacs 29 and before. See the Info node "(emacs) Registers" for more
details about the new UI and its variants.
** Ediff
---
*** New user option 'ediff-floating-control-frame'.
If non-nil, try making the control frame be floating rather than tiled.
Many X tiling window managers make the Ediff control frame a tiled
window equal in size to the main Emacs frame, which works poorly.
This option is useful to set if you use such a window manager.
** Buffer Selection
---
*** New user option 'bs-default-action-list'.
You can now configure how to display the "*buffer-selection*" buffer
using this new option. (Or set 'display-buffer-alist' directly.)
** Eshell
+++
*** New builtin Eshell command 'compile'.
This command runs another command, sending its output to a compilation
buffer when the command would output interactively. This can be useful
when defining aliases so that they produce a compilation buffer when
appropriate, but still allow piping the output elsewhere if desired.
For more information, see the "(eshell) Built-ins" node in the Eshell
manual.
+++
*** Eshell's 'env' command now supports running commands.
Like in many other shells, Eshell's 'env' command now lets you run a
command passed as arguments to 'env'. If you pass any initial
arguments of the form 'VAR=VALUE', 'env' will first set 'VAR' to
'VALUE' before running the command.
---
*** Eshell's 'umask' command now supports setting the mask symbolically.
Now, you can pass an argument like "u+w,o-r" to Eshell's 'umask'
command, which will give write permission for owners of newly-created
files and deny read permission for users who are not members of the
file's group. See the Info node "(coreutils) File permissions" for
more information on this notation.
+++
*** New special reference type '#<marker POSITION BUFFER>'.
This special reference type returns a marker at 'POSITION' in
'BUFFER'. You can insert it by typing or using the new interactive
command 'eshell-insert-marker'. You can also insert special
references of any type using the new interactive command
'eshell-insert-special-reference'. See the "(eshell) Arguments" node
in the Eshell manual for more details.
+++
*** New splice operator for Eshell dollar expansions.
Dollar expansions in Eshell now let you splice the elements of the
expansion in-place using '$@expr'. This makes it easier to fill lists
of arguments into a command, such as when defining aliases. For more
information, see the "(eshell) Dollars Expansion" node in the Eshell
manual.
+++
*** You can now splice Eshell globs in-place into argument lists.
By setting 'eshell-glob-splice-results' to a non-nil value, Eshell
will expand glob results in-place as if you had typed each matching
file name individually. For more information, see the "(eshell)
Globbing" node in the Eshell manual.
+++
*** Eshell now supports negative numbers and ranges for indices.
Now, you can retrieve the last element of a list with '$my-list[-1]'
or get a sublist of elements 2 through 4 with '$my-list[2..5]'. For
more information, see the "(eshell) Dollars Expansion" node in the
Eshell manual.
+++
*** Eshell commands can now be explicitly-remote (or local).
By prefixing a command name in Eshell with a remote identifier, like
"/ssh:user@remote:whoami", you can now run commands on a particular
host no matter your current directory. Likewise, you can run a
command on your local system no matter your current directory via
"/:whoami". For more information, see the "(eshell) Remote Access"
node in the Eshell manual.
+++
*** Eshell's '$UID' and '$GID' variables are now connection-aware.
Now, when expanding '$UID' or '$GID' in a remote directory, the value
is the user or group ID associated with the remote connection.
---
*** Eshell now uses 'field' properties in its output.
In particular, this means that pressing the '<home>' key moves the
point to the beginning of your input, not the beginning of the whole
line. If you want to go back to the old behavior, add something like
this to your configuration:
(keymap-set eshell-mode-map "<home>" #'eshell-bol-ignoring-prompt)
This also means you no longer need to adjust 'eshell-prompt-regexp'
when customizing your Eshell prompt.
---
*** You can now properly unload Eshell.
Calling '(unload-feature 'eshell)' no longer signals an error, and now
correctly unloads Eshell and all of its modules.
+++
*** 'eshell-read-aliases-list' is now an interactive command.
After manually editing 'eshell-aliases-file', you can use this command
to load the edited aliases.
+++
*** 'rgrep' is now a builtin command.
Running 'rgrep' in Eshell now uses the Emacs grep facility instead of
calling external rgrep.
+++
*** If a command exits abnormally, the Eshell prompt now shows its exit code.
+++
*** New user option 'eshell-history-append'.
If non-nil, each Eshell session will save history by appending new
entries of that session to the history file rather than overwriting
the file with the whole history of the session. The default is nil.
** Minibuffer and Completions
*** New commands 'previous-line-completion' and 'next-line-completion'.
Bound to '<up>' and '<down>' arrow keys, respectively, they navigate
the "*Completions*" buffer vertically by lines, wrapping at the
top/bottom when 'completion-auto-wrap' is non-nil.
*** New user option 'minibuffer-visible-completions'.
When customized to non-nil, you can use arrow keys in the minibuffer
to navigate the completions displayed in the "*Completions*" window.
Typing 'RET' selects the highlighted candidate. 'C-g' hides the
completions window. When the completions window is not visible,
then all these keys have their usual meaning in the minibuffer.
This option is supported for in-buffer completion as well.
*** Selected completion candidates are deselected on typing.
When you type at the minibuffer prompt, the current completion
candidate will be un-highlighted, and point in the "*Completions*" window
will be moved off that candidate. 'minibuffer-choose-completion'
('M-RET') will still choose a previously-selected completion
candidate, but the new command 'minibuffer-choose-completion-or-exit'
(bound to 'RET' by 'minibuffer-visible-completions') will exit with
the minibuffer contents instead. This deselection behavior can be
controlled with the new user option 'completion-auto-deselect', which
is t by default.
*** New value 'historical' for user option 'completions-sort'.
When 'completions-sort' is set to 'historical', completion candidates
will be first sorted alphabetically, and then re-sorted by their order
in the minibuffer history, with more recent candidates appearing first.
+++
*** 'completion-category-overrides' supports more metadata.
The new supported completion properties are 'cycle-sort-function',
'display-sort-function', 'annotation-function', 'affixation-function',
and 'group-function'. You can now customize them for any category in
'completion-category-overrides' that will override the properties
defined in completion metadata.
+++
*** 'completion-extra-properties' supports more metadata.
The new supported completion properties are 'category',
'group-function', 'display-sort-function', and 'cycle-sort-function'.
** Pcomplete
---
*** New user option 'pcomplete-remote-file-ignore'.
When this option is non-nil, remote file names are not completed by
Pcomplete. Packages, like 'shell-mode', could set this in order to
suppress remote file name completion at all.
---
*** Completion for the 'doas' command has been added.
Command completion for 'doas' in Eshell and Shell mode will now work.
** Shell mode
+++
*** New user option 'shell-get-old-input-include-continuation-lines'.
When this user option is non-nil, 'shell-get-old-input' ('C-RET')
includes multiple shell "\" continuation lines from command output.
Default is nil.
** Make mode
*** The Makefile browser is now obsolete.
The command 'makefile-switch-to-browser' command is now obsolete,
together with related commands used in the "*Macros and Targets*"
buffer. We recommend using an alternative like 'imenu' instead.
** Prog mode
+++
*** New command 'prog-fill-reindent-defun'.
This command either fills a single paragraph in a defun, such as a
docstring, or a comment, or (re)indents the surrounding defun if
point is not in a comment or a string. It is by default bound to
'M-q' in 'prog-mode' and all its descendants.
** Which Function mode
+++
*** Which Function mode can now display function names on the header line.
The new user option 'which-func-display' allows choosing where the
function name is displayed. The default is 'mode' to display in the
mode line. 'header' will display in the header line;
'mode-and-header' displays in both the header line and mode line.
** Tramp
+++
*** New connection method "androidsu".
This provides access to system files with elevated privileges granted by
the idiosyncratic 'su' implementations and system utilities customary on
Android.
+++
*** New connection methods "dockercp" and "podmancp".
These are the external methods counterparts of "docker" and "podman".
+++
*** New connection methods "toolbox" and "flatpak".
They allow accessing system containers provided by Toolbox or
sandboxes provided by Flatpak.
+++
*** Connection method "kubernetes" supports now optional container name.
The host name for Kubernetes connections can be of kind [CONTAINER.]POD,
in order to specify a dedicated container. If there is just the pod
name, the first container in the pod is taken. The new user options
'tramp-kubernetes-context' and 'tramp-kubernetes-namespace' allow
accessing pods with different context or namespace but the default one.
+++
*** Rename 'tramp-use-ssh-controlmaster-options' to 'tramp-use-connection-share'.
The old name still exists as obsolete variable alias. This user
option controls now connection sharing for both ssh-based and
plink-based methods. It allows the values t, nil, and 'suppress'.
The latter suppresses also "ControlMaster" settings in the user's
"~/.ssh/config" file, or connection share configuration in PuTTY
sessions, respectively.
+++
*** New command 'tramp-cleanup-some-buffers'.
It kills only a subset of opened remote buffers, subject to the user
option 'tramp-cleanup-some-buffers-hook'.
+++
*** New command 'inhibit-remote-files'.
This command disables the handling of file names with the special
remote file name syntax. It should be applied only when remote files
won't be used in this Emacs instance. It provides a slightly improved
performance of file name handling in Emacs.
+++
*** New macro 'without-remote-files'.
This macro could wrap code which handles local files only. Due to the
temporary deactivation of remote files, it results in a slightly
improved performance of file name handling in Emacs.
+++
*** New user option 'tramp-completion-multi-hop-methods'.
It contains a list of connection methods for which completion should
be attempted at the end of a multi-hop chain. This allows completion
candidates to include a list of, for example, containers running on a
remote docker host.
+++
*** New command 'tramp-revert-buffer-with-sudo'.
It reverts the current buffer to visit with "sudo" permissions. The
buffer must either visit a file, or it must run 'dired-mode'. Another
method but "sudo" can be configured with user option
'tramp-file-name-with-method'.
---
*** Direct asynchronous processes use 'tramp-remote-path'.
When a direct asynchronous process is invoked, it uses 'tramp-remote-path'
for setting the remote PATH environment variable.
** File Notifications
+++
*** All backends except w32notify detect unmounting of a watched filesystem now.
** EWW
+++
*** 'eww-open-file' can now display the file in a new buffer.
By default, the command reuses the "*eww*" buffer, but if called with
the new argument NEW-BUFFER non-nil, it will use a new buffer instead.
Interactively, invoke 'eww-open-file' with a prefix argument to
activate this behavior.
---
*** 'eww' URL or keyword prompt now has tab completion.
The interactive minibuffer prompt when invoking 'eww' now has support
for tab completion.
+++
*** 'eww' URL and keyword prompt now completes suggested URIs and bookmarks.
The interactive minibuffer prompt when invoking 'eww' now provides
completions from 'eww-suggest-uris'. 'eww-suggest-uris' now includes
bookmark URIs.
+++
*** New command 'eww-copy-alternate-url'.
It copies an alternate link on the page currently visited in EWW into
the kill ring. Alternate links are optional metadata that HTML pages
use for linking to their alternative representations, such as
translated versions or associated RSS feeds.
+++
*** 'eww-open-in-new-buffer' supports the prefix argument.
When invoked with the prefix argument ('C-u'),
'eww-open-in-new-buffer' will not make the new buffer the current one.
This is useful for continuing reading the URL in the current buffer
when the new URL is fetched.
---
*** History navigation in EWW now works like other browsers.
Previously, when navigating back and forward through page history, EWW
would add a duplicate entry to the end of the history list each time.
This made it impossible to navigate to the "end" of the history list.
Now, navigating through history in EWW simply changes your position in
the history list, allowing you to reach the end as expected. In
addition, when browsing to a new page from a "historical" one (i.e. a
page loaded by navigating back through history), EWW deletes the history
entries newer than the current page. To change the behavior when
browsing from "historical" pages, you can customize
'eww-before-browse-history-function'.
+++
*** 'eww-readable' now toggles display of the readable parts of a web page.
When called interactively, 'eww-readable' toggles whether to display
only the readable parts of a page or the full page. With a positive
prefix argument, always display the readable parts, and with a zero or
negative prefix, always display the full page.
---
*** New option 'eww-readable-adds-to-history'.
When non-nil (the default), calling 'eww-readable' adds a new entry to
the EWW page history.
** go-ts-mode
+++
*** New command 'go-ts-mode-docstring'.
This command adds a docstring comment to the current defun. If a
comment already exists, point is only moved to the comment. It is
bound to 'C-c C-d' in 'go-ts-mode'.
** Man mode
+++
*** New user option 'Man-prefer-synchronous-call'.
When this is non-nil, run the 'man' command synchronously rather than
asynchronously (which is the default behavior).
+++
*** New user option 'Man-support-remote-systems'.
This option controls whether the man page is formatted on the remote
system when the current buffer's default-directory is remote. You can
invoke the 'man' command with a prefix argument to countermand the
value of this option for the current invocation of 'man'.
** DocView
---
*** New face 'doc-view-svg-face'.
This replaces 'doc-view-svg-foreground' and 'doc-view-svg-background'.
If you don't like the colors produced by the default definition of
this new face when DocView displays documents, customize this face to
restore the colors you were used to, or to get colors more to your
liking.
---
*** DocView buffers now display a new tool bar.
This tool bar contains options for searching and navigating within the
document, replacing the incompatible items for incremental search and
editing within the default tool bar displayed in the past.
** Shortdoc
+++
*** New function 'shortdoc-function-examples'.
This function returns examples of use of a given Emacs Lisp function
from the available shortdoc information.
+++
*** New function 'shortdoc-help-fns-examples-function'.
This function inserts into the current buffer examples of use of a
given Emacs Lisp function, which it gleans from the shortdoc
information. If you want 'describe-function' ('C-h f') to insert
examples of using the function into regular "*Help*" buffers, add the
following to your init file:
(add-hook 'help-fns-describe-function-functions
#'shortdoc-help-fns-examples-function)
** Package
---
*** New user option 'package-vc-register-as-project'.
When non-nil, it will automatically register every package as a
project, that you can quickly select using 'project-switch-project'
('C-x p p').
---
*** New user option 'package-vc-allow-build-commands'.
Controls for which packages Emacs runs extra build commands when
installing directly from the package VCS repository.
---
*** New command to start an inferior Emacs loading only specific packages.
The new command 'package-isolate' will start a new Emacs process, as
a sub-process of Emacs where you invoke the command, in a way that
causes the new process to load only some of the installed packages.
The command prompts for the packages to activate in this
sub-process, and is intended for testing Emacs and/or the packages
in a clean environment.
** Flymake
+++
*** New user option 'flymake-show-diagnostics-at-end-of-line'.
When non-nil, Flymake shows summarized descriptions of diagnostics at
the end of the line. Depending on your preference, this can either be
distracting and easily confused with actual code, or a significant
early aid that relieves you from moving the buffer or reaching for the
mouse to consult an error message.
** Flyspell
*** New user option 'flyspell-check-changes'.
When non-nil, Flyspell mode spell-checks only words that you edited; it
does not check unedited words just because you move point across them.
** JS mode.
The binding 'M-.' has been removed from the major mode keymaps in
'js-mode' and 'js-ts-mode', having it default to the global binding
which calls 'xref-find-definitions'. If the previous one worked
better for you, use 'define-key' in your init script to bind
'js-find-symbol' to that combination again.
** Json mode.
'js-json-mode' does not derive from 'js-mode' any more so as not
to confuse tools like Eglot or YASnippet into thinking that those
buffers contain Javascript code.
** Python mode
---
*** New user option 'python-indent-block-paren-deeper'.
If non-nil, increase the indentation of the lines inside parens in a
header of a block when they are indented to the same level as the body
of the block:
if (some_expression
and another_expression):
do_something()
instead of:
if (some_expression
and another_expression):
do_something()
*** New user option 'python-interpreter-args'.
This allows the user to specify command line arguments to the non
interactive Python interpreter specified by 'python-interpreter'.
** use-package
+++
*** New ':vc' keyword.
This keyword enables the user to install packages using 'package-vc'.
** Gnus
*** The 'nnweb-type' option 'gmane' has been removed.
The gmane.org website is, sadly, down since a number of years with no
prospect of it coming back. Therefore, it is no longer valid to set
the user option 'nnweb-type' to 'gmane'.
---
*** New user option 'gnus-mode-line-logo'.
This allows the user to either disable the display of any logo or
specify which logo will be displayed as part of the
buffer-identification in the mode-line of Gnus buffers.
** Rmail
---
*** New commands for reading mailing lists.
The new Rmail commands 'rmail-mailing-list-post',
'rmail-mailing-list-unsubscribe', 'rmail-mailing-list-help', and
'rmail-mailing-list-archive' allow, respectively, posting to,
unsubscribing from, requesting help about, and browsing the archives
of, the mailing list from which the current email message was
delivered.
** Dictionary
---
*** New user option 'dictionary-search-interface'.
Controls how the 'dictionary-search' command prompts for and displays
dictionary definitions. Customize this user option to 'help' to have
'dictionary-search' display definitions in a "*Help*" buffer and
provide dictionary-based minibuffer completion for word selection.
---
*** New user option 'dictionary-read-word-prompt'.
This allows the user to customize the prompt that is used by
'dictionary-search' when asking for a word to search in the
dictionary.
---
*** New user option 'dictionary-display-definition-function'.
This allows the user to customize the way in which 'dictionary-search'
displays word definitions. If non-nil, this user option should be set
to a function that displays a word definition obtained from a
dictionary server. The new function
'dictionary-display-definition-in-help-buffer' can be used to display
the definition in a "*Help*" buffer, instead of the default
"*Dictionary*" buffer.
---
*** New user option 'dictionary-read-word-function'.
This allows the user to customize the way in which 'dictionary-search'
prompts for a word to search in the dictionary. This user option
should be set to a function that lets the user select a word and
returns it as a string. The new function
'dictionary-completing-read-word' can be used to prompt with
completion based on dictionary matches.
---
*** New user option 'dictionary-read-dictionary-function'.
This allows the user to customize the way in which 'dictionary-search'
prompts for a dictionary to search in. This user option should be set
to a function that lets the user select a dictionary and returns its
name as a string. The new function
'dictionary-completing-read-dictionary' can be used to prompt with
completion based on dictionaries that the server supports.
** Pp
*** New 'pp-default-function' user option replaces 'pp-use-max-width'.
*** New default pretty printing function, which tries to obey 'fill-column'.
*** 'pp-to-string' takes an additional PP-FUNCTION argument.
This argument specifies the prettifying algorithm to use.
** Emacs Lisp mode
---
*** ',@' now has 'prefix' syntax.
Previously, the '@' character, which normally has 'symbol' syntax,
would combine with a following Lisp symbol and interfere with symbol
searching.
---
*** 'emacs-lisp-docstring-fill-column' now defaults to 72.
It was previously 65. The new default formats documentation strings to
fit on fewer lines without negatively impacting readability.
** CPerl mode
---
*** Subroutine signatures are now supported.
CPerl mode fontifies subroutine signatures like variable declarations
which makes them visually distinct from subroutine prototypes.
*** Syntax of Perl up to version 5.38 is supported.
CPerl mode supports the new keywords for exception handling and the
object oriented syntax which were added in Perl 5.36 and 5.38.
*** New user option 'cperl-fontify-trailer'.
This user option takes the values 'perl-code' or 'comment' and treats
text after an "__END__" or "__DATA__" token accordingly. The default
value of 'perl-code' is useful for trailing POD and for AutoSplit
modules, the value 'comment' makes CPerl mode treat trailers as
comment, like Perl mode does.
*** New command 'cperl-file-style'.
This command sets the indentation style for the current buffer. To
change the default style, either use the user option with the same name
or use the command 'cperl-set-style'.
*** Commands using the Perl info page are obsolete.
The Perl documentation in info format is no longer distributed with
Perl or on CPAN since more than 10 years. Perl documentation can be
read with 'cperl-perldoc' instead.
*** Highlighting trailing whitespace has been removed.
The user option 'cperl-invalid-face' is now obsolete, and does
nothing. See the user option 'show-trailing-whitespace' instead.
** Emacs Sessions (Desktop)
+++
*** Restoring buffers visiting remote files can now time out.
When a buffer is restored which visits a remote file, the restoration
of the session could hang if the remote host is off-line or slow to
respond. Setting the user option 'remote-file-name-access-timeout' to
a positive number will abandon the attempt to restore such buffers
after a timeout of that many seconds, thus allowing the rest of
desktop restoration to continue.
** Recentf
+++
*** Checking recent remote files can now time out.
Similarly to buffer restoration by Desktop, 'recentf-mode' checking
of the accessibility of remote files can now time out if
'remote-file-name-access-timeout' is set to a positive number.
** Notifications
+++
*** Allow using Icon Naming Specification for ':app-icon'.
You can use a symbol as the value for ':app-icon' to provide icon name
without specifying a file, like this:
(notifications-notify
:title "I am playing music" :app-icon 'multimedia-player)
** Image Dired
*** New user option 'image-dired-thumb-naming'.
You can now configure how a thumbnail is named using this option.
** ERT
+++
*** New macro 'skip-when' to skip 'ert-deftest' tests.
This can help avoid some awkward skip conditions. For example
'(skip-unless (not noninteractive))' can be changed to the easier
to read '(skip-when noninteractive)'.
+++
*** Syntax highlighting unit testing support.
An ERT extension ('ert-font-lock') now provides support for face
assignment unit testing. For more information, see the "(ert) Syntax
Highlighting Tests" node in the ERT manual.
** URL
+++
*** 'url-gateway-broken-resolution' is now obsolete.
This option was intended for use on SunOS 4.x and Ultrix systems,
neither of which have been supported by Emacs since version 23.1.
The user option 'url-gateway-nslookup-program' and the function
'url-gateway-nslookup-host' are consequently also obsolete.
** Socks
+++
*** Socks supports version 4a.
The 'socks-server' user option accepts '4a' as a value for its version
field.
** Edmacro
+++
*** New command 'edmacro-set-macro-to-region-lines'.
Bound to 'C-c C-r', this command replaces the macro text with the
lines of the region. If needed, the region is extended to include
whole lines. If the region ends at the beginning of a line, that last
line is excluded.
+++
*** New user option 'edmacro-reverse-macro-lines'.
When this is non-nil, the lines of key sequences are displayed with
the most recent line first. This is can be useful when working with
macros with many lines, such as from 'kmacro-edit-lossage'.
** Miscellaneous
---
*** Webjump now assumes URIs are HTTPS instead of HTTP.
For links in 'webjump-sites' without an explicit URI scheme, it was
previously assumed that they should be prefixed with "http://". Such
URIs are now prefixed with "https://" instead.
---
*** 'bug-reference-mode' now supports 'thing-at-point'.
Now, calling '(thing-at-point 'url)' when point is on a bug reference
will return the URL for that bug.
+++
*** New user option 'rcirc-log-time-format'
This allows for rcirc logs to use a custom timestamp format, than the
chat buffers use by default.
---
*** New user option 'Buffer-menu-group-by'.
It controls how buffers are divided into groups that are displayed with
headings using Outline minor mode.
---
*** New command 'Buffer-menu-toggle-internal'.
This command toggles the display of internal buffers in Buffer Menu mode;
that is, buffers not visiting a file and whose names start with a space.
Previously, such buffers were never shown. This command is bound to 'I'
in Buffer Menu mode.
** Customize
+++
*** New command 'customize-dirlocals'.
This command pops up a buffer to edit the settings in ".dir-locals.el".
---
** New command 'customize-toggle-option'.
This command can toggle boolean options for the duration of a session.
** Calc
+++
*** Calc parses fractions written using U+2044 FRACTION SLASH.
Fractions of the form "123⁄456" are handled as if written "123:456".
Note in particular the difference in behavior from U+2215 DIVISION SLASH
and U+002F SOLIDUS, which result in division rather than a rational
fraction. You may also be interested to know that precomposed fraction
characters, such as ½ (U+00BD VULGAR FRACTION ONE HALF), are also
recognized as rational fractions. They have been since 2004, but it
looks like it was never mentioned in the NEWS, or even the manual.
** IELM
---
*** IELM now remembers input history between sessions.
The new user option 'ielm-history-file-name' is the name of the file
where IELM input history will be saved. Customize it to nil to revert
to the old behavior of not remembering input history between sessions.
** EasyPG
+++
*** New user option 'epa-keys-select-method'.
This allows the user to customize the key selection method, which can be
either by using a pop-up buffer or from the minibuffer. The pop-up
buffer method is the default, which preserves previous behavior.
** Xwidget Webkit
+++
*** New user option 'xwidget-webkit-disable-javascript'.
This allows disabling JavaScript in xwidget Webkit sessions.
\f
* New Modes and Packages in Emacs 30.1
** New major modes based on the tree-sitter library
+++
*** New major mode 'html-ts-mode'.
An optional major mode based on the tree-sitter library for editing
HTML files.
---
*** New major mode 'heex-ts-mode'.
A major mode based on the tree-sitter library for editing HEEx files.
---
*** New major mode 'elixir-ts-mode'.
A major mode based on the tree-sitter library for editing Elixir files.
---
*** New major mode 'lua-ts-mode'.
A major mode based on the tree-sitter library for editing Lua files.
** Minibuffer and Completions
+++
*** New global minor mode 'minibuffer-regexp-mode'.
This is a minor mode for editing regular expressions in the minibuffer.
It highlights parens via ‘show-paren-mode’ and ‘blink-matching-paren’ in
a user-friendly way, avoids reporting alleged paren mismatches and makes
sexp navigation more intuitive.
+++
*** New minor mode 'completion-preview-mode'.
This minor mode shows you symbol completion suggestions as you type,
using an inline preview. New user options in the 'completion-preview'
customization group control exactly when Emacs displays this preview.
---
** The highly accessible Modus themes collection has eight items.
The 'modus-operandi' and 'modus-vivendi' are the main themes that have
been part of Emacs since version 28. The former is light, the latter
dark. In addition to these, we now have 'modus-operandi-tinted' and
'modus-vivendi-tinted' for easier legibility, as well as
'modus-operandi-deuteranopia', 'modus-vivendi-deuteranopia',
'modus-operandi-tritanopia', and 'modus-vivendi-tritanopia' to cover
the needs of users with red-green or blue-yellow color deficiency.
The Info manual "(modus-themes) Top" describes the details and
showcases all their customization options.
+++
** New global minor mode 'etags-regen-mode'.
This minor mode generates the tags table automatically based on the
current project configuration, and later updates it as you edit the
files and save the changes.
+++
** New package Compat.
Emacs now comes with a stub implementation of the
forwards-compatibility Compat package from GNU ELPA. This allows
built-in packages to use the library more effectively, and helps
preventing the installation of Compat if unnecessary.
\f
* Incompatible Lisp Changes in Emacs 30.1
---
** Old derived.el functions removed.
The following functions have been deleted because they were only used
by code compiled with Emacs<21:
'derived-mode-init-mode-variables', 'derived-mode-merge-abbrev-tables',
'derived-mode-merge-keymaps', 'derived-mode-merge-syntax-tables',
'derived-mode-run-hooks', 'derived-mode-set-abbrev-table',
'derived-mode-set-keymap', 'derived-mode-set-syntax-table',
'derived-mode-setup-function-name'.
+++
** 'M-TAB' now invokes 'completion-at-point' also in Text mode.
By default, Text mode no longer binds 'M-TAB' to
'ispell-complete-word'. Instead, this mode arranges for
'completion-at-point', globally bound to 'M-TAB', to perform word
completion as well. You can have Text mode bind 'M-TAB' to
'ispell-complete-word' as it did in previous Emacs versions, or
disable Ispell word completion in Text mode altogether, by customizing
the new user option 'text-mode-ispell-word-completion'.
** 'pp' and 'pp-to-string' now always include a terminating newline.
In the past they included a terminating newline in most cases but not all.
** 'buffer-match-p' and 'match-buffers' take '&rest args'.
They used to take a single '&optional arg' and were documented to use
an unreliable hack to try and support condition predicates that
don't accept this optional arg.
The new semantics makes no such accommodation, but the code still
supports it (with a warning) for backward compatibility.
** 'post-gc-hook' runs after updating 'gcs-done' and 'gcs-elapsed'.
---
** The escape sequence '\x' not followed by hex digits is now an error.
Previously, '\x' without at least one hex digit denoted character code
zero (NUL) but as this was neither intended nor documented or even
known by anyone, it is now treated as an error by the Lisp reader.
---
** Connection-local variables are applied in buffers visiting a remote file.
This overrides possible directory-local or file-local variables with
the same name.
---
** User option 'tramp-completion-reread-directory-timeout' has been removed.
This user option has been obsoleted in Emacs 27, use
'remote-file-name-inhibit-cache' instead.
---
** User options 'eshell-NAME-unload-hook' are now obsolete.
These hooks were named incorrectly, and so they never actually ran
when unloading the corresponding feature. Instead, you should use
hooks named after the feature name, like 'esh-mode-unload-hook'.
+++
** 'copy-tree' now copies records when its optional 2nd argument is non-nil.
+++
** Regexp zero-width assertions followed by operators are better defined.
Previously, regexps such as "xy\\B*" would have ill-defined behavior.
Now any operator following a zero-width assertion applies to that
assertion only (which is useless). For historical compatibility, an
operator character following '^' or '\`' becomes literal, but we
advise against relying on this.
---
** Mode-line mnemonics for some coding-systems have changed.
The mode-line mnemonic for 'utf-7' is now the lowercase 'u', to be
consistent with the other encodings of this family.
The mode-line mnemonic for 'koi8-u' is now 'У', U+0423 CYRILLIC
CAPITAL LETTER U, to distinguish between this encoding and the
UTF-8/UTF-16 family.
If your terminal cannot display 'У', or if you want to get the old
behavior back for any other reason, you can do that using the
'coding-system-put' function. For example, the following restores the
previous behavior of showing 'U' in the mode line for 'koi8-u':
(coding-system-put 'koi8-u :mnemonic ?U)
---
** 'vietnamese-tcvn' is now a coding system alias for 'vietnamese-vscii'.
VSCII-1 and TCVN-5712 are different names for the same character
encoding. Therefore, the duplicate coding system definition has been
dropped in favor of an alias.
The mode-line mnemonic for 'vietnamese-vscii' and its aliases is the
lowercase letter 'v'.
+++
** Infinities and NaNs no longer act as symbols on non-IEEE platforms.
On old platforms like the VAX that do not support IEEE floating-point,
tokens like 0.0e+NaN and 1.0e+INF are no longer read as symbols.
Instead, the Lisp reader approximates an infinity with the nearest
finite value, and a NaN with some other non-numeric object that
provokes an error if used numerically.
+++
** X color support compatibility aliases are now marked obsolete.
The compatibility aliases 'x-defined-colors', 'x-color-defined-p',
'x-color-values', and 'x-display-color-p' are now obsolete.
+++
** 'easy-mmode-define-{minor,global}-mode' aliases are now obsolete.
Use 'define-minor-mode' and 'define-globalized-minor-mode' instead.
** The obsolete calling convention of 'sit-for' has been removed.
That convention was: '(sit-for SECONDS MILLISEC &optional NODISP)'.
** The 'millisec' argument of 'sleep-for' has been declared obsolete.
Use a float value for the first argument instead.
** 'eshell-process-wait-{seconds,milliseconds}' options are now obsolete.
Instead, use 'eshell-process-wait-time', which supports floating-point
values.
\f
* Lisp Changes in Emacs 30.1
** Built-in types have now corresponding classes.
At the Lisp level, this means that things like (cl-find-class 'integer)
will now return a class object, and at the UI level it means that
things like 'C-h o integer RET' will show some information about that type.
** New var 'major-mode-remap-defaults' and function 'major-mode-remap'.
The first is like Emacs-29's 'major-mode-remap-alist' but to be set by
packages (instead of users). The second looks up those two variables.
+++
** Pcase's functions (in 'pred' and 'app') can specify the argument position.
For example, instead of '(pred (< 5))' you can write '(pred (> _ 5))'.
+++
** 'define-advice' now sets the new advice's 'name' property to NAME.
Named advices defined with 'define-advice' can now be removed with
'(advice-remove SYMBOL NAME)' in addition to '(advice-remove SYMBOL
SYMBOL@NAME)'.
+++
** New function 'require-with-check' to detect new versions shadowing.
This is like 'require', but it checks whether the argument 'feature'
is already loaded, in which case it either signals an error or
forcibly reloads the file that defines the feature.
+++
** New variable 'lisp-eval-depth-reserve'.
It puts a limit to the amount by which Emacs can temporarily increase
'max-lisp-eval-depth' when handling signals.
+++
** New special form 'handler-bind'.
It provides a functionality similar to 'condition-case' except it runs
the handler code without unwinding the stack, such that we can record
the backtrace and other dynamic state at the point of the error. See
the Info node "(elisp) Handling Errors".
+++
** New 'pop-up-frames' action alist entry for 'display-buffer'.
This has the same effect as the variable of the same name and takes
precedence over the variable when present.
** New function 'merge-ordered-lists'.
Mostly used internally to do a kind of topological sort of
inheritance hierarchies.
** New function 'sort-on'.
This function implements the Schwartzian transform, and is appropriate
for sorting lists when the computation of the sort key of a list
element can be expensive.
** New API for 'derived-mode-p' and control of the graph of major modes.
*** 'derived-mode-p' now takes the list of modes as a single argument.
The same holds for 'provided-mode-derived-p'.
The old calling convention where multiple modes are passed as
separate arguments is deprecated.
*** New functions to access the graph of major modes.
While 'define-derived-mode' still only supports single inheritance,
modes can declare additional parents (for tests like 'derived-mode-p')
with 'derived-mode-add-parents'.
Accessing the 'derived-mode-parent' property directly is now
deprecated in favor of the new functions 'derived-mode-set-parent'
and 'derived-mode-all-parents'.
+++
** Drag-and-drop functions can now be called once for compound drops.
It is now possible for drag-and-drop handler functions to respond to
drops incorporating more than one URL. Functions capable of this must
set their 'dnd-multiple-handler' symbol properties to a non-nil value.
See the Info node "(elisp) Drag and Drop".
Incident to this change, the function 'dnd-handle-one-url' has been
made obsolete, for it cannot take these new handlers into account.
** New function 're-disassemble' to see the innards of a regexp.
If you compiled with '--enable-checking', you can use this to help debug
either your regexp performance problems or the regexp engine.
+++
** XLFDs are no longer restricted to 255 characters.
'font-xlfd-name' now returns an XLFD even if it is greater than 255
characters in length, provided that the LONG_XLFDs argument is true.
Other features in Emacs which employ XLFDs have been modified to
produce and understand XLFDs larger than 255 characters.
** 'defadvice' is marked as obsolete.
See the "(elisp) Porting Old Advice" Info node for help converting
them to use 'advice-add' or 'define-advice' instead.
** 'cl-old-struct-compat-mode' is marked as obsolete.
You may need to recompile our code if it was compiled with Emacs < 24.3.
+++
** New macro 'static-if' for conditional evaluation of code.
This macro hides a form from the evaluator or byte-compiler based on a
compile-time condition. This is handy for avoiding byte-compilation
warnings about code that will never actually run under some
conditions.
+++
** Desktop notifications are now supported on the Haiku operating system.
The new function 'haiku-notifications-notify' provides a subset of the
capabilities of the 'notifications-notify' function in a manner
analogous to 'w32-notification-notify'.
+++
** New value 'if-regular' for the REPLACE argument to 'insert-file-contents'.
It results in 'insert-file-contents' erasing the buffer instead of
preserving markers if the file being inserted is not a regular file,
rather than signaling an error.
+++
** New variable 'current-key-remap-sequence'.
It is bound to the key sequence that caused a call to a function bound
within 'function-key-map' or 'input-decode-map' around those calls.
+++
** New variables describing the names of built in programs.
The new variables 'ctags-program-name', 'ebrowse-program-name',
'etags-program-name', 'hexl-program-name', 'emacsclient-program-name'
'movemail-program-name', and 'rcs2log-program-name' should be used
instead of "ctags", "ebrowse", "etags", "hexl", "emacsclient", and
"rcs2log", when starting one of these built in programs in a
subprocess.
+++
** New variable 'case-symbols-as-words' affects case operations for symbols.
If non-nil, then case operations such as 'upcase-initials' or
'replace-match' (with nil FIXEDCASE) will treat the entire symbol name
as a single word. This is useful for programming languages and styles
where only the first letter of a symbol's name is ever capitalized.
The default value of this variable is nil.
+++
** 'x-popup-menu' now understands touch screen events.
When a 'touchscreen-begin' or 'touchscreen-end' event is passed as the
POSITION argument, it will behave as if that event was a mouse event.
+++
** New functions for handling touch screen events.
The new functions 'touch-screen-track-tap' and
'touch-screen-track-drag' handle tracking common touch screen gestures
from within a command.
** New user option 'safe-local-variable-directories'.
This user option names directories in which Emacs will treat all
directory-local variables as safe.
+++
** New parameter to 'touchscreen-end' events.
CANCEL non-nil establishes that the touch sequence has been
intercepted by programs such as window managers and should be ignored
with Emacs.
** New variable 'inhibit-auto-fill' to temporarily prevent auto-fill.
+++
** New variable 'secondary-tool-bar-map'.
If non-nil, this variable contains a keymap of menu items that are
displayed along tool bar items inside 'tool-bar-map'.
** New variable 'completion-lazy-hilit'.
Lisp programs that present completion candidates may bind this
variable non-nil around calls to functions such as
'completion-all-completions'. This tells the underlying completion
styles to skip eager fontification of completion candidates, which
improves performance. Such a Lisp program can then use the
'completion-lazy-hilit' function to fontify candidates just in time.
** New primitive 'buffer-last-name'.
It returns the name of a buffer before the last time it was renamed or
killed.
** New primitive 'marker-last-position'.
It returns the last position of a marker in its buffer even if that
buffer has been killed. ('marker-position' would return nil in that
case.)
** Functions and variables to transpose sexps
+++
*** New helper variable 'transpose-sexps-function'.
Emacs now can set this variable to customize the behavior of the
'transpose-sexps' function.
+++
*** New function 'transpose-sexps-default-function'.
The previous implementation is moved into its own function, to be
bound by 'transpose-sexps-function'.
*** New function 'treesit-transpose-sexps'.
Tree-sitter now unconditionally sets 'transpose-sexps-function' for all
tree-sitter enabled modes. This functionality utilizes the new
'transpose-sexps-function'.
** Functions and variables to move by program statements
*** New variable 'forward-sentence-function'.
Major modes can now set this variable to customize the behavior of the
'forward-sentence' command.
*** New function 'forward-sentence-default-function'.
The previous implementation of 'forward-sentence' is moved into its
own function, to be bound by 'forward-sentence-function'.
*** New function 'treesit-forward-sentence'.
All tree-sitter enabled modes that define 'sentence' in
'treesit-thing-settings' now set 'forward-sentence-function' to call
'treesit-forward-sentence'.
** Functions and variables to move by program sexps
*** New function 'treesit-forward-sexp'.
Tree-sitter conditionally sets 'forward-sexp-function' for major modes
that have defined 'sexp' in 'treesit-thing-settings' to enable
sexp-related motion commands.
+++
** Returned strings are never docstrings.
Functions and macros whose bodies consist of a single string literal now
only return that string; it is not used as a docstring. Example:
(defun sing-a-song ()
"Sing a song.")
The above function returns the string '"Sing a song."' but has no
docstring. Previously, that string was used as both a docstring and
return value, which was never what the programmer wanted. If you want
the string to be a docstring, add an explicit return value.
This change applies to 'defun', 'defsubst', 'defmacro' and 'lambda'
forms; other defining forms such as 'cl-defun' already worked this way.
** New or changed byte-compilation warnings
---
*** Warn about missing 'lexical-binding' directive.
The compiler now warns if an Elisp file lacks the standard
'-*- lexical-binding: ... -*-' cookie on the first line.
This line typically looks something like
;;; My little pony mode -*- lexical-binding: t -*-
It is needed to inform the compiler about which dialect of ELisp
your code is using: the modern dialect with lexical binding or
the old dialect with only dynamic binding.
Lexical binding avoids some name conflicts and allows the compiler to
detect more mistakes and generate more efficient code, so it is
recommended. For how to adapt your code to lexical binding, see the
manual section "(elisp) Converting to Lexical Binding".
If your code cannot be converted to lexical binding, you can insert
the line
;;; -*- lexical-binding: nil -*-
first in the file to declare that it uses the old dialect.
---
*** Warn about empty bodies for more special forms and macros.
The compiler now warns about an empty body argument to 'when',
'unless', 'ignore-error' and 'with-suppressed-warnings' in addition to
the existing warnings for 'let' and 'let*'. Example:
(when (> x 2))
This warning can be suppressed using 'with-suppressed-warnings' with
the warning name 'empty-body'.
---
*** Warn about quoted error names in 'condition-case' and 'ignore-error'.
The compiler now warns about quoted condition (error) names
in 'condition-case' and 'ignore-error'. Example:
(condition-case nil
(/ x y)
('arith-error "division by zero"))
Quoting them adds the error name 'quote' to those handled or ignored
respectively, which was probably not intended.
---
*** Warn about comparison with literal constants without defined identity.
The compiler now warns about comparisons by identity with a literal
string, cons, vector, record, function, large integer or float as this
may not match any value at all. Example:
(eq x "hello")
Only literals for symbols and small integers (fixnums), including
characters, are guaranteed to have a consistent (unique) identity.
This warning applies to 'eq', 'eql', 'memq', 'memql', 'assq', 'rassq',
'remq' and 'delq'.
To compare by (structural) value, use 'equal', 'member', 'assoc',
'rassoc', 'remove' or 'delete' instead. Floats and bignums can also
be compared using 'eql', '=' and 'memql'. Function literals cannot be
compared reliably at all.
This warning can be suppressed using 'with-suppressed-warnings' with
the warning name 'suspicious'.
---
*** Warn about 'condition-case' without handlers.
The compiler now warns when the 'condition-case' form is used without
any actual handlers, as in
(condition-case nil (read buffer))
because it has no effect other than the execution of the body form.
In particular, no errors are caught or suppressed. If the intention
was to catch all errors, add an explicit handler for 'error', or use
'ignore-error' or 'ignore-errors'.
This warning can be suppressed using 'with-suppressed-warnings' with
the warning name 'suspicious'.
---
*** Warn about 'unwind-protect' without unwind forms.
The compiler now warns when the 'unwind-protect' form is used without
any unwind forms, as in
(unwind-protect (read buffer))
because the behavior is identical to that of the argument; there is
no protection of any kind. Perhaps the intended unwind forms have
been misplaced or forgotten, or the use of 'unwind-protect' could be
simplified away.
This warning can be suppressed using 'with-suppressed-warnings' with
the warning name 'suspicious'.
---
*** Warn about useless trailing 'cond' clauses.
The compiler now warns when a 'cond' form contains clauses following a
default (unconditional) clause. Example:
(cond ((= x 0) (say "none"))
(t (say "some"))
(say "goodbye"))
Such a clause will never be executed but is likely to be a mistake,
perhaps due to misplaced brackets.
This warning can be suppressed using 'with-suppressed-warnings' with
the warning name 'suspicious'.
---
*** Warn about mutation of constant values.
The compiler now warns about code that modifies program constants in
some obvious cases. Examples:
(setcar '(1 2) 7)
(aset [3 4] 0 8)
(aset "abc" 1 ?d)
Such code may have unpredictable behavior because the constants are
part of the program, not data structures generated afresh during
execution, and the compiler does not expect them to change.
To avoid the warning, operate on an object created by the program
(maybe a copy of the constant), or use a non-destructive operation
instead.
This warning can be suppressed using 'with-suppressed-warnings' with
the warning name 'mutate-constant'.
---
*** Warn about more ignored function return values.
The compiler now warns when the return value from certain functions is
implicitly ignored. Example:
(progn (nreverse my-list) my-list)
will elicit a warning because it is usually pointless to call
'nreverse' on a list without using the returned value.
To silence the warning, make use of the value in some way, such as
assigning it to a variable. You can also wrap the function call in
'(ignore ...)', or use 'with-suppressed-warnings' with the warning
name 'ignored-return-value'.
The warning will only be issued for calls to functions declared
'important-return-value' or 'side-effect-free' (but not 'error-free').
---
*** Warn about docstrings that contain control characters.
The compiler now warns about docstrings with control characters other
than newline and tab. This is often a result of improper escaping.
Example:
(defun my-fun ()
"Uses c:\remote\dir\files and the key \C-x."
...)
where the docstring contains the four control characters 'CR', 'DEL',
'FF' and 'C-x'.
The warning name is 'docstrings-control-chars'.
---
*** The warning about wide docstrings can now be disabled separately.
Its warning name is 'docstrings-wide'.
---
** New user option 'native-comp-async-warnings-errors-kind'.
It allows control of what kinds of warnings and errors from asynchronous
native compilation are reported to the parent Emacs process. The
default is to report all errors and only important warnings. If you
were used to customizing 'native-comp-async-report-warnings-errors' to
nil or 'silent', we suggest that you now leave it at its default value,
and see if you get only warnings that matter.
+++
** New function declaration and property 'important-return-value'.
The declaration '(important-return-value t)' sets the
'important-return-value' property which indicates that the function
return value should probably not be thrown away implicitly.
** Bytecode is now always loaded eagerly.
Bytecode compiled with older Emacs versions for lazy loading using
'byte-compile-dynamic' is now loaded all at once.
As a consequence, 'fetch-bytecode' has no use, does nothing, and is
now obsolete. The variable 'byte-compile-dynamic' has no effect any
more; compilation will always yield bytecode for eager loading.
+++
** New functions 'file-user-uid' and 'file-group-gid'.
These functions are like 'user-uid' and 'group-gid', respectively, but
are aware of file name handlers, so they will return the remote UID or
GID for remote files (or -1 if the connection has no associated user).
+++
** 'fset', 'defalias' and 'defvaralias' now signal an error for cyclic aliases.
Previously, 'fset', 'defalias' and 'defvaralias' could be made to
build circular function and variable indirection chains as in
(defalias 'able 'baker)
(defalias 'baker 'able)
but trying to use them would sometimes make Emacs hang. Now, an attempt
to create such a loop results in an error.
Since circular alias chains now cannot occur, 'function-alias-p',
'indirect-function' and 'indirect-variable' will never signal an error.
Their 'noerror' arguments have no effect and are therefore obsolete.
+++
** 'treesit-font-lock-rules' now accepts additional global keywords.
When supplied with ':default-language LANGUAGE', rules after it will
default to use 'LANGUAGE'.
---
** New optional argument to 'modify-dir-local-variable'.
A 5th argument, optional, has been added to
'modify-dir-local-variable'. It can be used to specify which
dir-locals file to modify.
** Connection local variables
+++
*** New macros 'connection-local-p' and 'connection-local-value'.
The former macro returns non-nil if a variable has a connection-local
binding. The latter macro returns the connection-local value of a
variable if any, or its current value.
** Hash tables
+++
*** ':rehash-size' and ':rehash-threshold' args no longer have any effect.
These keyword arguments are now ignored by 'make-hash-table'. Emacs
manages the memory for all hash table objects in the same way.
The functions 'hash-table-rehash-size' and 'hash-table-rehash-threshold'
remain for compatibility but now always return the old default values.
+++
*** The printed representation has been shrunk and simplified.
The 'test' parameter is omitted if it is 'eql' (the default), as is
'data' if empty. 'rehash-size', 'rehash-threshold' and 'size' are
always omitted, and ignored if present when the object is read back in.
** Obarrays
+++
*** New obarray type.
Obarrays are now represented by an opaque type instead of using vectors.
They are created by 'obarray-make' and manage their internal storage
automatically, which means that the size parameter to 'obarray-make' can
safely be omitted. That is, they do not become slower as they fill up.
The old vector representation is still accepted by functions operating
on obarrays, but 'obarrayp' only returns t for obarray objects.
'type-of' now returns 'obarray' for obarray objects.
Old code which (incorrectly) created "obarrays" as Lisp vectors filled
with something other than 0, as in '(make-vector N nil)', will no longer
work, and should be rewritten to use 'obarray-make'. Alternatively, you
can fill the vector with 0.
+++
*** New function 'obarray-clear' removes all symbols from an obarray.
---
*** 'obarray-size' and 'obarray-default-size' are now obsolete.
They pertained to the internal storage size which is now irrelevant.
+++
** 'treesit-install-language-grammar' can handle local directory instead of URL.
It is now possible to pass a directory of a local repository as URL
inside 'treesit-language-source-alist', so that calling
'treesit-install-language-grammar' would avoid cloning the repository.
It may be useful, for example, for the purposes of bisecting a
treesitter grammar.
+++
** New buffer-local variable 'tabulated-list-groups'.
It controls display and separate sorting of groups of entries.
---
** New text property 'context-menu-functions'.
Like the variable with the same name, it adds menus from the list that
is the value of the property to context menus shown when clicking on the
text which as this property.
---
** Detecting the end of an iteration of a keyboard macro
'read-event', 'read-char', and 'read-char-exclusive' no longer return -1
when called at the end of an iteration of a the execution of a keyboard
macro. Instead, they will transparently continue reading available input
(e.g., from the keyboard). If you need to detect the end of a macro
iteration, check the following condition before calling one of the
aforementioned functions:
(and (arrayp executing-kbd-macro)
(>= executing-kbd-macro-index (length executing-kbd-macro))))
\f
* Changes in Emacs 30.1 on Non-Free Operating Systems
** MS-Windows
+++
*** You can now opt out of following the system's Dark mode.
By default, Emacs on MS-Windows follows the system's Dark mode for its
title bars' and scroll bars' appearance. If the new user option
'w32-follow-system-dark-mode' is customized to the nil value, Emacs
will disregard the system's Dark mode and will always use the default
Light mode.
\f
----------------------------------------------------------------------
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/>.
\f
Local variables:
coding: utf-8
mode: outline
mode: emacs-news
paragraph-separate: "[ \f]"
end:
|