summary refs log tree commit diff stats
path: root/tag-emacs/emacs.d/init.org
blob: 82a2c0eede5ff70daf8b6690e32415e6ca69e338 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
#+TITLE: Emacs Configuration for Alan Pearce
#+OPTIONS: ^:nil
#+PROPERTY: results silent
#+PROPERTY: eval no-export
#+PROPERTY: header-args :comments link
* Introduction
This is a living document, detailing my Emacs configuration using org-mode
* Basics
** Startup
Open Emacs with just a plain window.  No graphics or messages, please!
#+BEGIN_SRC emacs-lisp
  (put 'inhibit-startup-echo-area-message 'saved-value
     (setq inhibit-startup-echo-area-message (user-login-name)))
  (setq inhibit-startup-screen t)
  (setq gc-cons-threshold 100000000)
  (setq file-name-handler-alist nil)
#+END_SRC

** Scratch buffers
I usually use scratch buffers for any sort of text.  If I need a
programming mode in one, then I’ll just call it manually.  I also like
the buffer to be empty.
#+BEGIN_SRC emacs-lisp
  (setq initial-scratch-message ""
        initial-major-mode 'text-mode)
#+END_SRC

** Personal Information
#+BEGIN_SRC emacs-lisp
  (setq user-mail-address "alan@alanpearce.co.uk"
        user-full-name "Alan Pearce")
#+end_src

* Packaging

** Use-package

#+BEGIN_SRC emacs-lisp
  (eval-and-compile
    (setq package-archives '(("gnu" . "http://elpa.gnu.org/packages/")
                             ("marmalade" . "http://marmalade-repo.org/packages/")
                             ("melpa-stable" . "http://stable.melpa.org/packages/")
                             ("melpa" . "http://melpa.org/packages/"))
          package-user-dir (concat "~/.emacs.d/packages/" emacs-version "/elpa")
          package-pinned-packages '(("use-package" . melpa-stable)
                                    ("diminish" . melpa-stable)
                                    ("bind-key" . melpa-stable))
          package-archive-priorities '(("melpa-stable" . 10)
                                       ("gnu" . 10)
                                       ("marmalade" . 5)
                                       ("melpa" . 0))
          package-menu-async t
          package-menu-hide-low-priority t)
    (package-initialize)
    (unless (package-installed-p 'use-package)
      (package-refresh-contents)
      (package-install 'use-package)))
  (eval-when-compile (require 'use-package))
  (unless (featurep 'use-package)
    (require 'diminish)
    (require 'bind-key)
    (use-package use-package
      :commands (use-package-autoload-keymap)
      :defer 5))
  (setq use-package-verbose t
        use-package-always-ensure t
        package-enable-at-startup nil)
#+END_SRC

* Customize
I don’t really like using customize for normal configuration.
Instead, I use it for things that get saved automatically.  That’s why
I use a different file, which is ignored by the VCS.  It also means
that it’s not important whether the file exists or not, which is why I
pass =:noerror= to =load=

#+BEGIN_SRC emacs-lisp
  (setq custom-file "~/.emacs.d/custom.el")
  (load custom-file :noerror :nomessage)
#+END_SRC

* Styles

I prefer an always-visible cursor.  Feels less distracting.
#+BEGIN_SRC emacs-lisp
  (when (fboundp #'blink-cursor-mode)
    (blink-cursor-mode -1))
#+END_SRC

Disable all the bars, unless on OSX, in which case, keep the menu bar.

#+BEGIN_SRC emacs-lisp
  (when (and menu-bar-mode (not (eq window-system 'ns)))
    (menu-bar-mode -1))
  (with-eval-after-load 'scroll-bar
    (set-scroll-bar-mode nil))
  (with-eval-after-load 'tooltip
    (tooltip-mode -1))
  (with-eval-after-load 'tool-bar
    (tool-bar-mode -1))
#+END_SRC

Ring the bell sometimes, but not so often
#+BEGIN_SRC emacs-lisp
  (setq ring-bell-function
        (lambda ()
          (unless (memq this-command
                        '(isearch-abort abort-recursive-edit exit-minibuffer keyboard-quit undo-tree-undo))
            (ding))))
#+END_SRC

#+BEGIN_SRC emacs-lisp
  (use-package dash)
#+END_SRC

** Colours

I quite like solarized.  I don’t think it’s perfect, but it supports a
lot of modes.
#+BEGIN_SRC emacs-lisp
  (use-package solarized-theme
    :disabled t
    :config (progn
              (setq solarized-distinct-fringe-background t)
              (setq solarized-high-contrast-mode-line t)
              (load-theme 'solarized-light t)))
#+END_SRC

Let’s try a more minimal theme.

#+BEGIN_SRC emacs-lisp
  (use-package minimal-theme
    :disabled t
    :config (progn
              (load-theme 'minimal-light t)))
#+END_SRC

Let’s try a basic theme.

#+BEGIN_SRC emacs-lisp
  (use-package basic-theme
    :config (progn
              (load-theme 'basic t)
              (defun mode-line-visual-toggle ()
                (interactive)
                (let ((faces-to-toggle '(mode-line mode-line-inactive))
                      (invisible-color "#e8e8e8")
                      (visible-color "#a1b56c"))
                  (cond ((string= visible-color (face-attribute 'mode-line :background))
                         (mapcar (lambda (face)
                                   (set-face-background face invisible-color)
                                   (set-face-attribute face nil :height 20))
                                 faces-to-toggle))
                        (t
                         (mapcar (lambda (face)
                                   (set-face-background face visible-color)
                                   (set-face-attribute face nil :height (face-attribute 'default :height)))
                                 faces-to-toggle)))))
              (mode-line-visual-toggle)))
#+END_SRC

Highlighting quasi-quoted expressions in lisps is quite useful.
#+BEGIN_SRC emacs-lisp
  (use-package highlight-stages
    :diminish highlight-stages-mode
    :config (progn
              (add-hook 'lisp-mode-common-hook #'highlight-stages-mode)))
#+END_SRC

** Fonts

When possible, set up fonts.  I don’t have any settings here for X11,
because I manage those in my [[file:~/projects/dotfiles/tag-xresources/xresources/main][XResources file]].
#+BEGIN_SRC emacs-lisp
  (when (or (display-graphic-p)
            (daemonp))

    (defun use-variable-fonts ()
      (interactive)
      (variable-pitch-mode)
      (setq cursor-type 'bar))

    (defun ap/set-fonts (mono-face mono-font-size variable-face variable-font-size)
      (when mono-face
        (let ((default-font (font-spec :family mono-face :size  mono-font-size)))
          (add-to-list 'default-frame-alist `(font . ,(format "%s %s" mono-face mono-font-size)))
          (set-face-font 'fixed-pitch default-font)
          (set-frame-font default-font t t)))
      (when variable-face
        (set-face-font 'variable-pitch (font-spec :name variable-face :size variable-font-size))))

    (defun ap/set-fonts-according-to-system ()
      (interactive)
      (cond
       ((eq window-system 'w32)
        (ap/set-fonts "Liberation Mono" 11 "Segoe UI" 11))
       ((eq window-system 'ns)
        (let ((displays (string-to-number (shell-command-to-string "system_profiler SPDisplaysDataType | grep \"Online: Yes\" | wc -l"))))
          (if (eq displays 1)
              (ap/set-fonts "SF Mono" 12 "Lucida Grande" 12)
            (ap/set-fonts "ProggyClean" 11 "Lucida Grande" 12))))
       ((eq window-system 'x)
        (set-fontset-font "fontset-default" 'unicode (font-spec :name "Terminus" :size 12))
        (ap/set-fonts "Terminus" 12 "Lucida" 10))))

    (ap/set-fonts-according-to-system))
#+END_SRC

Reduce font decoration.  I’m trying to see whether this helps me focus
on the right things.
#+BEGIN_SRC emacs-lisp
  (setq font-lock-maximum-decoration '((dired-mode . 1)
                                       (t . 1)))
#+END_SRC

** Page Breaks

By default, Emacs displays page breaks as ^L.  Lines look much nicer.
On Windows, Emacs incorrectly detects that U+2500 (Box Drawings Light
Horizontal) can only be displayed with a different font, which is not
correct, at least for Liberation Mono.

#+BEGIN_SRC emacs-lisp
  (use-package page-break-lines
    :defer 5
    :diminish page-break-lines-mode
    :config (progn
              (global-page-break-lines-mode)
              (unless (eq (char-displayable-p ?─) (char-displayable-p ?a))
                (set-fontset-font "fontset-default"
                                  (cons page-break-lines-char page-break-lines-char)
                                  (face-attribute 'default :family)))))
#+END_SRC
** Modeline

#+BEGIN_SRC emacs-lisp
  (column-number-mode t)
  (size-indication-mode t)

  (setq frame-title-format '("%f" (dired-directory dired-directory)))
#+END_SRC

** Highlight Changes

Highlight what just changed when I undo, yank, and so on.

#+BEGIN_SRC emacs-lisp
  (use-package volatile-highlights
    :diminish volatile-highlights-mode
    :config (progn
              (volatile-highlights-mode t)))
#+END_SRC

** Renaming major modes

Diminishing major modes does not happen in the same manner as minor
modes.

#+BEGIN_SRC emacs-lisp
  (use-package cyphejor
    :defer 2
    :config (progn
              (setq cyphejor-rules `(("emacs"       "ε")
                                     ("diff"        "Δ")
                                     ("js2"         "js")
                                     ("magit-status" ,(char-to-string (-find #'char-displayable-p '(11942 5848 177))))
                                     ("inferior"    "i" :prefix)
                                     ("interaction" "i" :prefix)
                                     ("interactive" "i" :prefix)
                                     ("menu"        "▤" :postfix)
                                     ("ledger"      "Ledger")
                                     ("mode"        "")
                                     ("shell"       "sh" :postfix)))
              (cyphejor-mode 1)))
#+END_SRC


* Keybindings

I think =set-keyboard-coding-system= stops OS X from doing something
annoying to add accents.  The modifier setup is to match my
re-arrangement of modifiers on OSX: Cmd on the outside, then
Option/alt, then Control.

#+BEGIN_SRC emacs-lisp
  (when (eq system-type 'darwin)
    (set-keyboard-coding-system nil)
    (custom-set-variables
     '(mac-option-modifier 'meta)
     '(mac-right-option-modifier 'none)
     '(mac-control-modifier 'control)
     '(mac-right-control-modifier 'left)
     '(mac-command-modifier 'super)
     '(mac-right-command-modifier 'left)
     '(mac-function-modifier 'hyper))
    (unbind-key "s-x"))
#+END_SRC

#+BEGIN_SRC emacs-lisp
  (unbind-key "<f4>")
  (bind-key* "<f5>" #'compile)
  (bind-key* "<f6>" #'kmacro-start-macro-or-insert-counter)
  (bind-key* "<f7>" #'kmacro-end-or-call-macro)

  (bind-key* "<apps>" #'execute-extended-command)

  (unbind-key "C-z")
  (bind-key* "C-<tab>" #'other-window)

  (bind-key* "C-x C-r" #'revert-buffer)
  (bind-key* "C-x C-j" #'delete-indentation)
  (unbind-key "C-x C-c")

  (bind-key* "C-c i" #'insert-char)
  (bind-key* "M-/" #'hippie-expand)

  (unbind-key "s-h")
  (unbind-key "s-n")
  (unbind-key "s-p")
  (unbind-key "s-w")
  (bind-key* "s-k" #'kill-or-delete-this-buffer-dwim)

  (bind-key "C-M-a" #'backward-paragraph text-mode-map)
  (bind-key "C-M-e" #'forward-paragraph text-mode-map)

  (bind-key* "s-x" (define-prefix-command 'super-x-map))
  (bind-key* "s-," #'switch-to-dotfiles)
  (bind-key* "C-M-x" #'execute-extended-command)
  (set-register ?z `(file . ,(expand-file-name ".config/zsh/zshrc" "~")))
#+END_SRC

** Crux

I can replace most of the simple helper/wrapper functions in my
configuration with crux.el

#+BEGIN_SRC emacs-lisp
  (use-package crux
    :bind (("M-o" . crux-smart-open-line-above)
           ("C-o" . crux-smart-open-line)

           ("C-x 4 t" . crux-transpose-windows)
           ("C-c e" . crux-eval-and-replace)
           ("C-c D" . crux-delete-file-and-buffer)
           ("C-c R" . crux-rename-file-and-buffer))
    :init (progn
            (defalias 'delete-current-buffer-file #'crux-delete-file-and-buffer)
            (defalias 'rename-current-buffer-file #'crux-rename-file-and-buffer)))
#+END_SRC

* Projects

#+BEGIN_SRC emacs-lisp
  (defvar work-project-directory "~/work")
  (defvar home-project-directory "~/projects")
#+END_SRC

#+BEGIN_SRC emacs-lisp
  (defun switch-to-dotfiles ()
    (interactive)
    (projectile-persp-switch-project (expand-file-name "dotfiles" home-project-directory)))
#+END_SRC

** The Silver Searcher

#+BEGIN_SRC emacs-lisp
  (use-package ag
    :defer 30
    :config (setq ag-project-root-function #'projectile-project-root))
#+END_SRC

** Ripgrep

Step over Silver Search, here comes a new challenger.

#+BEGIN_SRC emacs-lisp
  (use-package ripgrep
    :if (executable-find "rg"))

  (use-package projectile-ripgrep
    :bind (("C-c p s r" . projectile-ripgrep))
    :ensure nil)
#+END_SRC

** Projectile

Projectile is awesome for working in projects, especially VCS-backed
ones.  I added a couple of functions to allow me to open new projects
based upon some folder conventions I use.

#+BEGIN_SRC emacs-lisp
  (use-package projectile
    :bind (("C-c C-f" . projectile-find-file)
           ("s-x s-f" . projectile-find-file)
           ("C-x g" . projectile-vc)
           ("s-G"   . projectile-vc))
    :demand t
    :diminish projectile-mode
    :config (progn
              (projectile-global-mode)
              (add-to-list 'projectile-globally-ignored-directories ".stversions")
              (defun ap/subfolder-projects (dir)
                (--map (file-relative-name it dir)
                       (-filter (lambda (subdir)
                                  (--reduce-from (or acc (funcall it subdir)) nil
                                                 projectile-project-root-files-functions))
                                (-filter #'file-directory-p (directory-files dir t "\\<")))))

              (defun ap/open-subfolder-project (from-dir &optional arg)
                (let ((project-dir (projectile-completing-read "Open project: "
                                                               (ap/subfolder-projects from-dir))))
                  (projectile-switch-project-by-name (expand-file-name project-dir from-dir) arg)))

              (defun yarn-install (&optional arg)
                (interactive "P")
                (projectile-with-default-dir (projectile-project-root)
                  (cmd-to-echo "yarn" "install")))

              (defun ap/open-work-project (&optional arg)
                (interactive "P")
                (ap/open-subfolder-project work-project-directory arg))

              (defun ap/open-home-project (&optional arg)
                (interactive "P")
                (ap/open-subfolder-project home-project-directory arg))

              (setq projectile-switch-project-action #'projectile-dired
                    projectile-remember-window-configs t
                    projectile-completion-system 'ivy)))
#+END_SRC

*** projectile-git-autofetch

Automatically fetch repositories I’m working on.

#+BEGIN_SRC emacs-lisp
  (use-package projectile-git-autofetch
    :config (progn
              (setq projectile-git-autofetch-projects 'open)
              (projectile-git-autofetch-mode 1)))
#+END_SRC

** perspective

This package makes buffer-switching inside of projects make sense, by
filtering the candidates to those within the project.  For it to work,
it needs hooking into projectile and a key bound to switch between projects.

#+BEGIN_SRC emacs-lisp
  (use-package perspective
    :bind* ("s-p" . projectile-persp-switch-project)
    :demand t
    :config (progn
              (setq persp-show-modestring t)
              (persp-mode)))

  (use-package persp-projectile
    :ensure t)
#+END_SRC

** vc

This is nice for some things that magit doesn’t do, and for those rare
occasions that I’m working with something other than git.

#+BEGIN_SRC emacs-lisp
  (use-package vc
    :defer t
    :bind (("C-x v C" . vc-resolve-conflicts))
    :config (progn
              (setq vc-follow-symlinks t)))
#+END_SRC

** diff-hl

It’s nice to be able to see at a glance which lines of a file have
changed.  This package colours the fringe

#+BEGIN_SRC emacs-lisp
  (use-package diff-hl
    :defer 2
    :config (progn
              (global-diff-hl-mode 1)
              (add-hook 'dired-mode-hook (lambda ()
                                           (diff-hl-dired-mode 1)))
              (add-hook 'magit-post-refresh-hook #'diff-hl-magit-post-refresh)))
#+END_SRC

** magit

Magit is my favourite way to use git.  I use selective staging all the
time.  Make sure to set it up with a nice =completing-read-function=

#+BEGIN_SRC emacs-lisp
  (use-package magit
    :defer 5
    :commands (magit-status)
    :config (progn (setq magit-last-seen-setup-instructions "1.4.0"
                         magit-completing-read-function #'magit-builtin-completing-read
                         magit-popup-use-prefix-argument 'default
                         magit-push-always-verify nil
                         magit-display-buffer-function #'magit-display-buffer-fullcolumn-most-v1
                         global-magit-file-mode nil)
                   (add-to-list 'magit-no-confirm 'safe-with-wip))
    :init (add-hook 'magit-mode-hook #'magit-load-config-extensions))
#+END_SRC

** git-timemachine

This package allow me to go through a file’s history with just a few
keys.  It makes it very easy to figure what what exactly was in a file
in the past.  I often find it useful when I remember writing something
a particular way, but it changed later.

#+BEGIN_SRC emacs-lisp
  (use-package git-timemachine
    :commands git-timemachine)
#+END_SRC

* Files

** Auto-saving

Auto-save everything to a temporary directory, instead of cluttering
the filesystem.  I don’t want emacs-specific lockfiles, either.

#+BEGIN_SRC emacs-lisp
  (setq auto-save-file-name-transforms `((".*" ,temporary-file-directory t))
        create-lockfiles nil)
#+END_SRC
** Backups

I like to keep my backups out of regular folders.  I tell emacs to use
a subfolder of its configuration directory for that.  Also, use the
trash for deleting on OS X.
#+BEGIN_SRC emacs-lisp
  (let ((backup-dir (expand-file-name "~/.emacs.d/backups/")))
    (unless (file-directory-p backup-dir)
      (make-directory backup-dir))
    (setq backup-directory-alist `((".*" . ,backup-dir))
          backup-by-copying-when-linked t
          backup-by-copying-when-mismatch t))
  (if (eq system-type 'darwin)
      (setq delete-by-moving-to-trash t)
    (if (and (executable-find "trash") (not (fboundp #'system-move-file-to-trash)))
        (defun system-move-file-to-trash (file)
          (call-process (executable-find "trash")
                        nil 0 nil
                        file))))
#+END_SRC

** autorevert

#+BEGIN_SRC emacs-lisp
  (use-package autorevert
    :diminish auto-revert-mode
    :init (progn
            (global-auto-revert-mode 1)
            (setq auto-revert-verbose nil
                  auto-revert-use-notify (not (eq system-type 'darwin)))))
#+END_SRC

** Encoding

UTF-8 is usually appropriate.  Note that =prefer-coding-system= expects
only a coding system, not a coding system and line ending combination.

#+BEGIN_SRC emacs-lisp
  (prefer-coding-system 'utf-8)
  (setq-default buffer-file-coding-system 'utf-8-auto-unix)
#+END_SRC

** Buffer-file management

Ask if I want to create a directory when it doesn’t exist.  This is
especially nice when starting new projects.

#+BEGIN_SRC emacs-lisp
  (defun my-create-non-existent-directory ()
    (let ((parent-directory (file-name-directory buffer-file-name)))
      (when (and (not (file-exists-p parent-directory))
                 (y-or-n-p (format "Directory `%s' does not exist!  Create it?" parent-directory)))
        (make-directory parent-directory t))))
  (add-to-list 'find-file-not-found-functions #'my-create-non-existent-directory)
#+END_SRC

I often want to rename or delete the file that I’m currently visiting
with a buffer.

#+BEGIN_SRC emacs-lisp
  (defun kill-or-delete-this-buffer-dwim (&optional arg)
    "Kills current buffer.  With prefix arg, delete it."
    (interactive "P")
    (if (equal arg '(4))
        (delete-current-buffer-file)
      (if server-buffer-clients
          (server-edit)
        (let ((buf (buffer-name)))
          (when (equal buf "*HTTP Response*")
            (other-window 1))
          (kill-buffer buf)))))
#+END_SRC

** Whitespace Butler

I don’t like it when editors change an entire file’s layout when I
open it.  Whitespace butler fixes whitespace only for lines that I’m editing.

#+BEGIN_SRC emacs-lisp
  (use-package ws-butler
    :if window-system
    :diminish ws-butler-mode
    :config (ws-butler-global-mode 1))
  (if (daemonp)
      (add-hook 'before-make-frame-hook (lambda ()
                                          (use-package ws-butler
                                            :config (ws-butler-global-mode 1)))))
#+END_SRC

** shrink-whitespace

DWIM whitespace removal.  So I don’t need =M-SPC=, =M-\= and =C-x o=
for similar things any more.

#+BEGIN_SRC emacs-lisp
  (use-package shrink-whitespace
    :bind ("M-SPC" . shrink-whitespace))
#+END_SRC

** Tramp

Tramp is awesome.  It makes SSH feel Unix-y.  The proxy setup is so
that I can sudo on remote machines

#+BEGIN_SRC emacs-lisp
  (use-package tramp
    :defer 7
    :config (progn
              (unless (getenv "SSH_AUTH_SOCK")
                (setenv "SSH_AUTH_SOCK" "/run/user/1000/ssh-agent.socket"))
              (setq tramp-default-method "ssh"
                    tramp-default-user-alist '(("\\`su\\(do\\)?\\'" nil "root"))
                    tramp-backup-directory-alist backup-directory-alist
                    backup-enable-predicate (lambda (name)
                                              (and (normal-backup-enable-predicate name)
                                                   (not (let ((method (file-remote-p name 'method)))
                                                          (when (stringp method)
                                                            (member method '("su" "sudo")))))))
                    tramp-shell-prompt-pattern "\\(?:^\\|
\\)[^]#$%>\n]*#?[]#$%>❯›] *\\(\\[\\??[0-9;]*[a-zA-Z] *\\)*")
              (add-to-list 'tramp-default-proxies-alist '(nil "\\`root\\'" (concat "/" tramp-default-method ":%h:")))
              (add-to-list 'tramp-default-proxies-alist `(,(regexp-quote (system-name)) nil nil))
              (add-to-list 'tramp-default-proxies-alist '("localhost" nil nil))
              (add-to-list 'tramp-default-proxies-alist '("router" nil nil))))

  (use-package tramp-sh
    :ensure nil
    :defer t
    :config (progn
              (add-to-list 'tramp-remote-path "/usr/local/sbin")
              (add-to-list 'tramp-remote-path "~/bin")))
#+END_SRC

** ediff

I like a horizonal diff setup, with everything in one frame.

#+BEGIN_SRC emacs-lisp
  (use-package ediff
    :defer t
    :config (progn
              (setq ediff-split-window-function 'split-window-horizontally
                    ediff-window-setup-function 'ediff-setup-windows-plain)))
#+END_SRC

* Indentation

Ah, a complicated topic.  One day we’ll all be using elastic
tabstops.  I’ve recently switched to using two spaces, since elastic
tabstops is probably never going to happen.

#+BEGIN_SRC emacs-lisp
  (setq-default tab-width 2
                indent-tabs-mode nil)
#+END_SRC

** auto-indent-mode

Don’t make me think, just indent it!  Unless it’s a
whitespace-sensitive language, of course.

#+BEGIN_SRC emacs-lisp
  (use-package auto-indent-mode
    :config (progn
              (setq auto-indent-key-for-end-of-line-then-newline "<C-return>"
                    auto-indent-key-for-end-of-line-insert-char-then-newline "<C-S-return>"
                    auto-indent-blank-lines-on-move nil
                    auto-indent-assign-indent-level 2
                    auto-indent-backward-delete-char-behavior nil
                    auto-indent-delete-trailing-whitespace-on-save-file t
                    auto-indent-mode-untabify-on-yank-or-paste nil
                    auto-indent-start-org-indent nil
                    auto-indent-known-indent-level-variables
                    (remq 'lisp-body-indent auto-indent-known-indent-level-variables))
              (add-to-list 'auto-indent-disabled-modes-list 'jinja2-mode)
              (add-to-list 'auto-indent-disabled-modes-list 'yaml-mode)
              (add-to-list 'auto-indent-disabled-modes-list 'saltstack-mode)
              (add-to-list 'auto-indent-disabled-modes-list 'nix-mode)
              (add-to-list 'auto-indent-disabled-modes-list 'coffee-mode)
              (add-to-list 'auto-indent-disabled-modes-list 'yaml-mode)
              (add-to-list 'auto-indent-disabled-modes-list 'ansible-mode)
              (auto-indent-global-mode)))
#+END_SRC

** smart-tabs-mode

Not related to [[smart-tab][=smart-tab=]], this mode indents with tabs and aligns
with spaces.  Perfect!

#+BEGIN_SRC emacs-lisp
  (use-package smart-tabs-mode
    :defer 1
    :config (progn
              (smart-tabs-insinuate 'c 'cperl 'python)
              (add-hook 'php-mode-hook (lambda ()
                                         (smart-tabs-mode indent-tabs-mode)))
              (with-eval-after-load "align.el"
                (smart-tabs-mode/no-tabs-mode-advice align)
                (smart-tabs-mode/no-tabs-mode-advice align-regexp))
              (eval-after-load "indent.el"
                '(smart-tabs-mode/no-tabs-mode-advice indent-relative))
              (eval-after-load "newcomment.el"
                '(progn (smart-tabs-mode/no-tabs-mode-advice comment-dwim)
                        (smart-tabs-mode/no-tabs-mode-advice comment-box)
                        (smart-tabs-mode/no-tabs-mode-advice comment-indent)))

              (unless
                  (ad-find-advice 'indent-according-to-mode 'around 'smart-tabs)
                (defadvice indent-according-to-mode (around smart-tabs activate)
                  (if smart-tabs-mode
                      (let ((indent-tabs-mode indent-tabs-mode))
                        (if (memq indent-line-function
                                  '(indent-relative
                                    indent-relative-maybe))
                            (setq indent-tabs-mode nil))
                        ad-do-it)
                    ad-do-it)))))
#+END_SRC

** editorconfig

#+BEGIN_SRC emacs-lisp
  (use-package editorconfig
    :config (editorconfig-mode 1))
#+END_SRC

** dtrt-indent-mode

Sometimes people use different indentation settings.  [[https://github.com/jscheid/dtrt-indent][dtrt-indent]]
guesses the correct settings for me.

#+BEGIN_SRC emacs-lisp
  (use-package dtrt-indent
    :config (progn
              (defun ap/dtrt-adapt-if-needed ()
                (unless editorconfig-mode
                  (dtrt-indent-adapt)))
              (if (fboundp #'editorconfig-mode)
                  (add-hook 'after-change-major-mode-hook #'ap/dtrt-adapt-if-needed)
                (add-hook 'after-change-major-mode-hook #'dtrt-indent-adapt))
              (defadvice dtrt-indent-try-set-offset (after toggle-smart-tabs activate)
                (smart-tabs-mode (or indent-tabs-mode -1)))))
#+END_SRC

* Security

** password-store

This is a frontend to the GPG-powered =pass= program.
#+BEGIN_SRC emacs-lisp
  (use-package password-store
    :defer 15
    :config (progn
              (setq password-store-password-length 16)))
#+END_SRC
* Buffers

** Ibuffer
Ibuffer is quite nice for listing all buffers.  I don’t use it very
often though, as it doesn’t really work with perspectives.

#+BEGIN_SRC emacs-lisp
  (use-package ibuffer
    :bind (("C-x C-b" . ibuffer))
    :config (progn
              (setq ibuffer-saved-filter-groups
                    (quote (("default"
                             ("org" (mode . org-mode))
                             ("emacs" (mode . emacs-lisp-mode))
                             ("zsh" (filename . "/zsh"))
                             ("server" (filename . "/su:root@server"))))))

              ;; Human-readable base-2 size column
              (define-ibuffer-column size-h
                (:name "Size" :inline t)
                (cond
                 ((> (buffer-size) 1024)
                  (format "%7.2fK" (/ (buffer-size) 1024.0)))
                 ((> (buffer-size) 1048576)
                  (format "%7.2fM" (/ (buffer-size) 1048576.0)))
                 (t
                  (format "%8d" (buffer-size)))))

              (setq ibuffer-formats
                    '((mark modified read-only " "
                            (name 18 18 :left :elide)
                            " "
                            (size-h 9 -1 :right)
                            " "
                            (mode 16 16 :left :elide)
                            " "
                            filename-and-process)))))
#+END_SRC

** Relative Buffer names

#+BEGIN_SRC emacs-lisp
  (use-package relative-buffers
    :defer 15
    :config (progn
              (global-relative-buffers-mode)))
#+END_SRC
** Narrowing

Enable it without prompting

#+BEGIN_SRC emacs-lisp
  (put 'narrow-to-defun  'disabled nil)
  (put 'narrow-to-page   'disabled nil)
  (put 'narrow-to-region 'disabled nil)
#+END_SRC

** ace-window

I don’t often have many windows open at once, but when I do,
=ace-window= is really nice to jump around them in the same way that
=ace-jump= or =avy= work.
#+BEGIN_SRC emacs-lisp
  (use-package ace-window
    :bind (("s-s" . ace-window))
    :config (progn
              (setq aw-dispatch-always t
                    aw-dispatch-alist '((?k aw-delete-window " Ace - Delete Window")
                                        (?K aw-delete-window)
                                        (?m aw-swap-window " Ace - Swap Window")
                                        (?f aw-flip-window)
                                        (?v aw-split-window-vert " Ace - Split Vert Window")
                                        (?b aw-split-window-horz " Ace - Split Horz Window")
                                        (?m delete-other-windows " Ace - Maximize Window")
                                        (?l delete-other-windows)
                                        (?, winner-undo)
                                        (?. winner-redo))
                    aw-keys '(?a ?r ?s ?t ?n ?e ?i ?o))))
#+END_SRC

* Windows

Scrolling is tricky.  I use this setup to help me keep track of the
point whilst I’m moving about.

#+BEGIN_SRC emacs-lisp
  (setq scroll-conservatively 100
        scroll-margin 1
        scroll-preserve-screen-position t
        mouse-wheel-scroll-amount '(1 ((shift) . 1) ((control)))
        split-height-threshold 80
        split-width-threshold 160
        frame-resize-pixelwise nil)
  (if (boundp 'ns-pop-up-frames)
      (setq ns-pop-up-frames nil))
#+END_SRC

** winner

Undo, for window-based commands.

#+BEGIN_SRC emacs-lisp
  (use-package winner
    :init (progn
            (winner-mode 1)
            (setq winner-boring-buffers '("*Completions*" "*Help*" "*Apropos*" "*Buffer List*" "*info*" "*Compile-Log*"))))
#+END_SRC

** windmove

Directional window movement

#+BEGIN_SRC emacs-lisp
  (use-package windmove
    :bind (("S-<left>"  . windmove-left)
           ("S-<right>" . windmove-right)
           ("S-<up>"    . windmove-up)
           ("S-<down>"  . windmove-down)))
#+END_SRC
* Completion

Make built-in completion a bit more intelligent, by adding substring
and initial-based completion and ignoring case.

#+BEGIN_SRC emacs-lisp
  (setq completion-styles '(basic initials partial-completion substring)
        completion-ignore-case t
        tab-always-indent 'complete)
#+END_SRC

** Company

The main choices for automatic completion in Emacs are company and
auto-complete-mode.  I’ve not tried auto-complete-mode as company
seems to work perfectly well for me.

#+BEGIN_SRC emacs-lisp
  (use-package company
    :commands (company-mode)
    :diminish "Cmpl"
    :bind (("C-<tab>" . company-complete)
           ("TAB" . company-indent-or-complete-common))
    :init (progn
            (add-hook 'prog-mode-hook #'company-mode)
            (setq company-backends '(company-bbdb company-web-html company-tern company-nxml company-css company-eclim company-semantic company-elisp
                                                  company-clang company-xcode company-cmake company-capf
                                                  company-files (company-dabbrev-code company-gtags
                                                                                      company-etags company-keywords) company-oddmuse
                                                                                      company-dabbrev)
                  company-idle-delay .3
                  company-begin-commands '(self-insert-command)
                  company-auto-complete #'company-explicit-action-p
                  company-auto-complete-chars '(?\ ?\( ?\) ?.)
                  company-tooltip-align-annotations t
                  company-dabbrev-downcase nil)))
#+END_SRC

#+BEGIN_SRC emacs-lisp
  (use-package company-web
    :after company)
#+END_SRC

#+BEGIN_SRC emacs-lisp
  (use-package company-nixos-options
    :if (eq system-type 'gnu/linux)
    :config (progn
              (add-to-list 'company-backends 'company-nixos-options)))
#+END_SRC

* Dates & Times

** Calendar

Weeks start on Monday for me and I prefer ISO-style dates.
#+BEGIN_SRC emacs-lisp
  (use-package calendar
    :defer 1
    :config (progn
              (setq calendar-week-start-day 1)
              (calendar-set-date-style 'iso)
              (setq calendar-latitude 52.52
                    calendar-longitude 13.40)))
#+END_SRC

Sometimes I want to insert a date or time into a buffer.
#+BEGIN_SRC emacs-lisp
  (defun insert-date (prefix)
    "Insert the current date.  With prefix-argument, use British format.  With
     two prefix arguments, write out the day and month name."
    (interactive "P")
    (let ((format (cond
                   ((not prefix) "%Y-%m-%d")
                   ((equal prefix '(4)) "%d/%m/%Y")
                   ((equal prefix '(16)) "%A, %d %B %Y"))))
      (insert (format-time-string format))))

  (defun insert-datetime (prefix)
    "Insert the current date and time."
    (interactive "P")
    (let ((format (cond
                   ((not prefix) "%Y-%m-%d %H:%M:%S")
                   ((equal prefix '(4)) "%Y-%m-%dT%H:%M:%SZ"))))
      (insert (format-time-string format))))
#+END_SRC

#+BEGIN_SRC emacs-lisp
  (defun yesterday-time ()
    "Provide the date/time 24 hours before the time now in the format of current-time."
    (timer-relative-time (current-time) -86400))
#+END_SRC

* Directories

Dired works quite nicely, but not always in the way I want.  I don’t
like having so many prompts for recursive operations.  Also, when I
have two dired windows open, assume that I’m going to be
copying/moving files between them.

#+BEGIN_SRC emacs-lisp
  (use-package dired
    :defer 3
    :ensure nil
    :config (progn
              (bind-key "<return>" #'dired-find-file dired-mode-map)
              (bind-key "^" (lambda () (interactive) (find-alternate-file "..")) dired-mode-map)
              (setq dired-dwim-target t
                    dired-recursive-copies 'top
                    dired-recursive-deletes 'top
                    dired-listing-switches "-alh"
                    dired-bind-jump nil)
              (when (and (eq system-type 'darwin) (executable-find "gls"))
                (setq insert-directory-program (executable-find "gls")))
              (put 'dired-find-alternate-file 'disabled nil)))
#+END_SRC

Don’t show uninteresting files in dired listings.

#+BEGIN_SRC emacs-lisp
  (defun turn-on-dired-omit-mode ()
    (interactive)
    (dired-omit-mode 1))

  (use-package dired-x
    :commands (dired-omit-mode
               dired-expunge)
    :ensure nil
    :config (progn
              (setq dired-omit-files "#\\|\\.$"
                    dired-omit-verbose nil
                    dired-find-subdir t))
    :init (progn
            (add-hook 'dired-mode-hook #'turn-on-dired-omit-mode)))
#+END_SRC

#+BEGIN_SRC emacs-lisp
  (use-package dired+
    :defer 5
    :config (progn
              (diredp-toggle-find-file-reuse-dir 1)
              (unbind-key "C-h C-m" dired-mode-map)))
#+END_SRC

Expand subfolders like a tree inside the parent

#+BEGIN_SRC emacs-lisp
  (with-eval-after-load 'dired
    (use-package dired-subtree
      :functions (dired-subtree--get-ov
                  dired-subtree-maybe-up)
      :init (progn
              (setq dired-subtree-use-backgrounds nil)
              (defun dired-subtree-maybe-up ()
                "Jump up one subtree or directory"
                (interactive)
                (let ((ov (dired-subtree--get-ov)))
                  (if ov
                      (progn (goto-char (overlay-start ov))
                             (dired-previous-line 1))
                    (dired-up-directory))))
              (bind-key "^" #'dired-subtree-maybe-up dired-mode-map)
              (bind-key "i" #'dired-subtree-toggle dired-mode-map))))
#+END_SRC

** Dired-narrow
One can already use dired with wildcards to browse a filtered
directory listing, but it opens a new buffer.  Dired-narrow is a
slightly nicer interface: with a currently-open dired buffer, use =/=
to start filtering, =RET= to complete the filter and =g= to refresh
the buffer, removing the filter.

#+BEGIN_SRC emacs-lisp
  (with-eval-after-load 'dired
    (use-package dired-narrow
      :bind (:map dired-mode-map
                  ("/" . dired-narrow))))
#+END_SRC

* Documentation

** ehelp

ehelp is a less well-known package that’s part of Emacs and slightly
improves the normal help commands, mostly by making quitting them easier.

#+BEGIN_SRC emacs-lisp
  (use-package ehelp
    :bind-keymap ("C-h" . ehelp-map))
#+END_SRC
** counsel-dash

Emacs’ documentation is great to read from inside Emacs.  Counsel-dash
helps to make documentation for other languages easier to access

#+BEGIN_SRC emacs-lisp
  (defmacro ap/create-counsel-dash-hook (mode docsets)
    (let* ((mode-s (symbol-name mode))
           (fun (intern (concat "counsel-dash-hook-" mode-s)))
           (hook (intern (concat mode-s "-mode-hook"))))
      `(progn
         (defun ,fun ()
           (when (require 'counsel-dash nil :noerror)
             (-each (-difference ',docsets
                                 (helm-dash-installed-docsets))
               #'counsel-dash-install-docset)
             (setq-local counsel-dash-docsets ',docsets)))
         (add-hook (quote ,hook) (function ,fun)))))

  (use-package counsel-dash
    :defer 20
    :defines counsel-dash-docsets
    :config (progn
              (setq counsel-dash-browser-func #'eww)
              (ap/create-counsel-dash-hook nginx ("Nginx"))
              (ap/create-counsel-dash-hook ansible ("Ansible"))
              (ap/create-counsel-dash-hook php ("PHP" "Symfony"))
              (ap/create-counsel-dash-hook twig ("Twig"))
              (ap/create-counsel-dash-hook js2 ("JavaScript" "NodeJS" "jQuery" "Express" "SailsJS" "Lo-Dash"))
              (ap/create-counsel-dash-hook markdown ("Markdown"))
              (ap/create-counsel-dash-hook saltstack ("SaltStack"))
              (ap/create-counsel-dash-hook clojure ("Clojure"))
              (ap/create-counsel-dash-hook sql ("PostgreSQL" "MySQL"))))
#+END_SRC

** discover-my-major

A nicer way to browse keybindings for major modes.

#+BEGIN_SRC emacs-lisp
  (use-package discover-my-major
    :bind ("<f1>" . discover-my-major))
#+END_SRC

** which-key

Popup keybindings following a prefix automatically.

#+BEGIN_SRC emacs-lisp
  (use-package which-key
    :diminish which-key-mode
    :config (progn
              (which-key-mode 1)
              (which-key-setup-side-window-right-bottom)))
#+END_SRC

** eldoc

Documentation in the echo-area (where the minibuffer is displayed) is
rather useful.

#+BEGIN_SRC emacs-lisp
  (use-package eldoc
    :commands (eldoc-mode)
    :diminish eldoc-mode
    :config (progn
              (setq eldoc-idle-delay 0.1)
              (eldoc-add-command 'paredit-backward-delete 'paredit-close-round)))
#+END_SRC
* Misc

#+BEGIN_SRC emacs-lisp
  (defvar *init-file*
    (let ((init-file (or user-init-file
                         (expand-file-name "init.el" user-emacs-directory))))
      (expand-file-name "init.el"
                        (file-name-directory (file-truename init-file))))
    "Where the emacs init file really is, passing through symlinks.")
  (set-register ?e `(file . ,*init-file*))

  (defun ap/remove-extra-cr ()
    "Remove extraneous CR codes from a file"
    (interactive)
    (save-excursion
      (goto-char (point-min))
      (while (search-forward "
  " nil t)
        (replace-match ""))))

  (use-package rect
    :ensure nil
    :init (defun copy-rectangle (start end)
            "Copy the region-rectangle."
            (interactive "r")
            (setq killed-rectangle (extract-rectangle start end))))

  (defun shell-execute (to-current-buffer)
    (interactive "P")
    (let ((file-buffer (if (buffer-file-name)
                           (file-name-nondirectory (buffer-file-name))
                         ""))
          (command (read-shell-command "Shell command: " nil nil nil)))
      (shell-command (replace-regexp-in-string "%" file-buffer command) to-current-buffer)))

  (defun narrow-to-region-indirect (start end)
    "Restrict editing in this buffer to the current region, indirectly."
    (interactive "r")
    (deactivate-mark)
    (let ((buf (clone-indirect-buffer nil nil)))
      (with-current-buffer buf
        (narrow-to-region start end))
      (switch-to-buffer buf)))

  (bind-key* "M-!" #'shell-execute)
  (bind-key* "C-x r M-w" #'copy-rectangle)
#+END_SRC

#+END_SRC

* Minibuffer

Sometimes I want to use the minibuffer, but I’m already inside it.
Fortunately, this is possible.  Of course, I need to know how many
minibuffers there are on the stack.

#+BEGIN_SRC emacs-lisp
  (setq enable-recursive-minibuffers t)
  (minibuffer-depth-indicate-mode t)
#+END_SRC

This avoids some issue with the minibuffer and the point being behind
the prompt.  I don’t remember what exactly.
#+BEGIN_SRC emacs-lisp
  (setq minibuffer-prompt-properties '(read-only t point-entered minibuffer-avoid-prompt face minibuffer-prompt))
#+END_SRC

Occasionally, I exit emacs.  I should probably reduce the frequency of this.
#+BEGIN_SRC emacs-lisp
  (if (daemonp)
      (defalias 'exit-emacs #'delete-frame)
    (defalias 'exit-emacs #'save-buffers-kill-emacs))
#+END_SRC

** swiper/ivy

Ivy is the new kid on the completion block.  It seems to be a strong
replacement for helm so far.

#+BEGIN_SRC emacs-lisp
  (use-package swiper
    :bind (("C-s" . swiper)
           ("C-r" . swiper)
           ("C-c C-r" . ivy-resume)
           ("C-x i" . ivy-imenu-goto)
           ("C-=" . swiper))
    :diminish ivy-mode
    :demand t
    :config (progn
              (ivy-mode 1)
              (setq ivy-re-builders-alist '((internal-complete-buffer . ivy--regex-fuzzy)
                                            (t . ivy--regex-plus)))
              (defun ivy-imenu-get-candidates-from (alist  &optional prefix)
                (cl-loop for elm in alist
                         nconc (if (imenu--subalist-p elm)
                                   (ivy-imenu-get-candidates-from
                                    (cl-loop for (e . v) in (cdr elm) collect
                                             (cons e (if (integerp v) (copy-marker v) v)))
                                    (concat prefix (if prefix ".") (car elm)))
                                 (and (cdr elm) ; bug in imenu, should not be needed.
                                      (setcdr elm (copy-marker (cdr elm))) ; Same as [1].
                                      (list (cons (concat prefix (if prefix ".") (car elm))
                                                  (copy-marker (cdr elm))))))))

              (defun ivy-imenu-goto ()
                "Go to buffer position"
                (interactive)
                (let ((imenu-auto-rescan t) items)
                  (unless (featurep 'imenu)
                    (require 'imenu nil t))
                  (setq items (imenu--make-index-alist t))
                  (ivy-read "imenu items:"
                            (ivy-imenu-get-candidates-from (delete (assoc "*Rescan*" items) items))
                            :action (lambda (k) (goto-char k)))))
              (ivy-set-actions 'ivy-switch-buffer '(("k" (lambda (x)
                                                           (kill-buffer x)
                                                           (ivy--reset-state ivy-last))
                                                     "kill")))
              (add-to-list 'ivy-initial-inputs-alist '(counsel-M-x . ""))))
#+END_SRC

** counsel

#+BEGIN_SRC emacs-lisp
  (use-package counsel
    :config (progn
              (bind-key "M-x" #'counsel-M-x)
              (bind-key "<apps>" #'counsel-M-x)
              (bind-key "<menu>" #'counsel-M-x)
              (bind-key "C-c M-x" #'execute-extended-command)
              (bind-key "C-x C-f" #'counsel-find-file)
              (bind-key "C-x b" #'counsel-switch-to-persp-buffer)
              (bind-key "M-y" #'counsel-yank-pop)
              (bind-key "M-y" #'ivy-next-line ivy-minibuffer-map)
              (defadvice counsel-find-file (after find-file-sudo activate)
                "Find file as root if necessary."
                (when (and buffer-file-name
                           (not (file-writable-p buffer-file-name)))
                  (message "File not writable %s" buffer-file-name)
                  (find-alternate-file (concat "/sudo::" buffer-file-name))))
              (defun counsel-switch-to-persp-buffer (arg)
                "Forward to `persp-switch-to-buffer'."
                (interactive "P")
                (ivy-read (format "Switch to buffer [%s]: " (persp-name persp-curr))
                          (remq nil (mapcar #'buffer-name (persp-buffers persp-curr)))
                          :preselect (buffer-name (other-buffer (current-buffer)))
                          :action #'ivy--switch-buffer-action
                          :keymap ivy-switch-buffer-map))))
#+END_SRC


** smex

Smex is my favourite way to use =M-x=.  Counsel’s =counsel-M-x=
function uses it internally, so I’m keeping it around, even though I
don’t use it directly.

#+BEGIN_SRC emacs-lisp
  (use-package smex
    :commands (smex
               smex-update
               smex-initialize)
    :config (progn
              (setq smex-key-advice-ignore-menu-bar t
                    smex-auto-update nil)
              (defun smex-update-after-load (_unused)
                (if (boundp 'smex-cache)
                    (smex-update)))
              (add-hook 'after-load-functions 'smex-update-after-load))
    :init (progn
            (setq smex-history-length 100
                  smex-save-file (concat user-emacs-directory
                                         "smex-items"))))
#+END_SRC

** cmd-to-echo

I’ve been looking for some way to run programming projects (mostly
node.js) inside emacs.  =cmd-to-echo= seems great for this, as new
output pops up in the echo area.

#+BEGIN_SRC emacs-lisp
  (use-package cmd-to-echo
    :commands (cmd-to-echo)
    :config (setq cmd-to-echo-add-output-to-process-buffers t))
#+END_SRC
* Modes

Setup some modes for systemd files
#+BEGIN_SRC emacs-lisp
  (add-to-list 'auto-mode-alist '("\\.service\\'" . conf-mode))
  (add-to-list 'auto-mode-alist '("\\.target\\'" . conf-mode))
  (add-to-list 'auto-mode-alist '("\\.socket\\'" . conf-mode))
#+END_SRC

=direnv=’s files are basically shell scripts, it’s a nice way to
set environment variables for projects.
#+BEGIN_SRC emacs-lisp
  (add-to-list 'auto-mode-alist '("\\.envrc\\'" . sh-mode))
#+END_SRC

Some modes that I don’t really customise much, mostly for
configuration files.
#+BEGIN_SRC emacs-lisp
  (use-package xrdb-mode
    :ensure nil
    :mode (("\\.Xdefaults\\'" . xrdb-mode)
           ("\\.Xresources\\'" . xrdb-mode)))

  (use-package haskell-mode
    :mode (("\\.hs\\'" . haskell-mode)))

  (use-package dockerfile-mode
    :mode (("Dockerfile\\'" . dockerfile-mode)))

  (use-package nix-mode
    :mode (("\\.nix\\'" . nix-mode)))

  (define-derived-mode xmonad-mode haskell-mode "XM")
  (add-to-list 'auto-mode-alist '("xmobarrc\\'" . xmonad-mode))
  (add-to-list 'auto-mode-alist '("xmonad.hs\\'" . xmonad-mode))

  (use-package nginx-mode
    :defer t
    :mode (("/nginx/servers/" . nginx-mode)
           ("/nginx/.*\\.d/" . nginx-mode)))

  (use-package lua-mode
    :defer t)

  (use-package ruby-mode
    :mode (("\\.rb\\'" . ruby-mode)
           ("\\.cap\\'" . ruby-mode)))

  (use-package go-mode
    :mode (("\\.go\\'" . go-mode)))

  (use-package jinja2-mode
    :mode (("\\.j2\\'" . jinja2-mode)
           ("\\.jinja\\'" . jinja2-mode)))

  (use-package scss-mode
    :defer t
    :config (progn
              (setq scss-compile-at-save nil)))

  (use-package yaml-mode
    :mode (("/group_vars/.*" . yaml-mode)
           ("/host_vars/.*" . yaml-mode)))

  (define-derived-mode ansible-mode yaml-mode "Ansible")
  (add-to-list 'auto-mode-alist '("\\(?:ansible.+\\|roles/.+/\\(?:tasks\\|handlers\\)\\)/.+\\.yml\\'" . ansible-mode))

  (define-derived-mode saltstack-mode yaml-mode "Salt")
  (add-to-list 'auto-mode-alist '("\\.sls\\'" . saltstack-mode))
#+END_SRC

** ledger

I use [[http://ledger-cli.org/][=ledger=]] to manage my finances.  It has an Emacs mode, which
works really nicely.

#+BEGIN_SRC emacs-lisp
  (use-package ledger-mode
    :mode ("\\.ledger\\'" . ledger-mode)
    :init (progn
            (defun open-budget ()
              (interactive)
              (projectile-persp-switch-project "~/Sync")
              (find-file (expand-file-name "ledger/my.ledger" (projectile-project-root)))
              (ledger-report "Budget (Cumulative)" nil)))
    :config (progn
              (setq ledger-use-iso-dates t
                    ledger-post-use-completion-engine :built-in
                    ledger-reconcile-default-commodity "€"
                    ledger-clear-whole-transactions t
                    ledger-narrow-on-reconcile t
                    ledger-default-date-format "%Y-%m-%d"
                    ledger-reports '(("Monthly Expenses" "ledger -f %(ledger-file) reg -M Expenses --real -l \"payee != 'Opening Balances'\"")
                                     ("Expenses:This Month" "ledger -f %(ledger-file) bal \\^Expenses -p \"this month\"")
                                     ("On-budget Balances" "ledger -f %(ledger-file) bal --current -R :Budget: Assets:Receivable Liabilities:Personal")
                                     ("All Account Balances" "ledger -f %(ledger-file) bal --current -R \\^Assets \\^Liabilities")
                                     ("Budget Values (Current Month)" "ledger -f %(ledger-file) bal -p \"this month\" --limit \"payee=~/budget/\" \\^Funds")
                                     ("Budget (Cumulative)" "ledger -f %(ledger-file) bal -E \\^Funds \\^Assets:Budget$")
                                     ("Budget Allocation" "ledger -f %(ledger-file) bal -p \"this month\" --limit \"payee=~/budget/\" \\^Funds --format \"\\
                    %-17((depth_spacer)+(partial_account))\\
                    %10(percent(market(display_total), market(parent.total)))\\
                    %16(market(display_total))\n%/\"")
                                     ("bal" "ledger -f %(ledger-file) bal")
                                     ("reg" "ledger -f %(ledger-file) reg")
                                     ("equity" "ledger -f %(ledger-file) equity")
                                     ("payee" "ledger -f %(ledger-file) reg @%(payee)")
                                     ("account" "ledger -f %(ledger-file) reg %(account)")))))
#+END_SRC

** Markdown

#+BEGIN_SRC emacs-lisp
  (use-package markdown-mode
    :defer t
    :config (progn
              (add-hook 'markdown-mode-hook #'turn-on-auto-fill)))
#+END_SRC

** Org

Org is wünderbar.

#+BEGIN_SRC emacs-lisp
  (use-package org
    :bind (("C-c C-a" . org-agenda-list)
           ("C-c a" . org-agenda)
           ("C-c l" . org-store-link))
    :defer 8
    :init (setq org-replace-disputed-keys t
                org-ellipsis "…")
    :config (progn
              (setq org-directory "~/Sync/org"
                    org-agenda-files `(,(concat org-directory "/agenda"))

                    org-default-notes-file (concat org-directory "/notes")

                    ;; ‘Remember’: new items at top
                    org-reverse-note-order t

                    org-modules '(org-protocol)

                    ;; Add time done to ‘done’ tasks
                    org-log-done 'time

                    org-list-allow-alphabetical t

                    org-adapt-indentation nil

                    org-pretty-entities t

                    org-table-duration-custom-format 'seconds

                    org-src-fontify-natively nil

                    org-export-have-math t

                    org-blank-before-new-entry '((heading . t)
                                                 (plain-list-item . auto))
                    org-fontify-done-headline t

                    org-todo-keywords '((sequence "BACKLOG(b)" "TODO(t)" "WAIT(w@/!)" "STARTED(s!)" "|" "DONE(d!)")
                                        (sequence "|" "CANCELLED(c@)"))
                    org-log-into-drawer "LOGBOOK")
              (set-register ?o `(file . ,(expand-file-name "organiser.org" org-directory)))
              (add-hook 'org-mode-hook #'turn-on-auto-fill)
              (org-load-modules-maybe t)))
#+END_SRC

**** org-babel

Org’s babel feature is really nice.  I use it for this file, and I can
use it to communicate between programming languages.  Sometime I hope
to have my =ledger= setup in an org file with some graph processing
with R or something.

#+BEGIN_SRC emacs-lisp
  (use-package ob-core
    :defer t
    :ensure nil
    :config (org-babel-do-load-languages
             'org-babel-load-languages
             '((ledger . t)
               (sh . t))))
#+END_SRC

**** org-journal

I can use this to keep a journal.  I should use it.

#+BEGIN_SRC emacs-lisp
  (use-package org-journal
    :bind ("s-j" . org-journal-new-entry)
    :defer 20
    :config (progn
              (setq org-journal-date-format "%A, %d %B %Y")
              (defun org-journal-display-entry-yesterday ()
                "Show org-journal entry for yesterday"
                (interactive)
                (org-journal-read-or-display-entry (yesterday-time)))))
#+END_SRC

**** org-mobile

#+BEGIN_SRC emacs-lisp
  (defun ap/org-mobile-pull (descriptor action file)
    (org-mobile-pull))
  (use-package org-mobile
    :defer 30
    :ensure nil
    :disabled t
    :config (progn
              (setq org-mobile-directory "~/Mobile/Org"
                    org-mobile-inbox-for-pull "~/Mobile/Org/from-mobile.org")
              (defvar org-mobile-push-timer nil
                "Timer that `org-mobile-push-timer' used to reschedule itself, or nil.")

              (defun org-mobile-push-with-delay (secs)
                (when org-mobile-push-timer
                  (cancel-timer org-mobile-push-timer))
                (setq org-mobile-push-timer
                      (run-with-idle-timer
                       (* 1 secs) nil 'org-mobile-push)))

              (add-hook 'after-save-hook
                        (lambda ()
                          (when (eq major-mode 'org-mode)
                            (dolist (file (org-mobile-files-alist))
                              (if (string= (file-truename (expand-file-name (car file)))
                                           (file-truename (buffer-file-name)))
                                  (org-mobile-push-with-delay 30))))))

              (run-at-time "00:05" 86400 '(lambda () (org-mobile-push-with-delay 1))) ;; refreshes agenda file each day
              (org-mobile-pull) ;; run org-mobile-pull at startup

              (defvar org-mobile-watcher nil)
              (when file-notify--library
                (let ((org-file (expand-file-name
                                 (concat
                                  (file-name-as-directory org-mobile-directory)
                                  org-mobile-capture-file))))
                  (setq org-mobile-watcher
                        (file-notify-add-watch org-file '(change) #'ap/org-mobile-pull))))))
#+END_SRC

**** org-caldav

I’ve setup CalDAV on my server, it would be nice to use it directly
from org-mode.  Previously I had to wait for org-mobile to sync and
write to the Android calendar, and then for DAVDroid to sync with the server.

#+BEGIN_SRC emacs-lisp
  (use-package org-caldav
    :defer 30
    :config (progn
              (setq org-caldav-url "https://calendar.alanpearce.uk/alan"
                    org-caldav-calendar-id "caldav"
                    org-caldav-inbox (concat org-directory "/agenda/caldav.org")
                    org-caldav-files `(,(concat org-directory "/agenda/organiser.org"))
                    org-icalendar-timezone "Europe/Berlin"
                    org-icalendar-use-scheduled '(event-if-todo event-if-not-todo todo-start)
                    org-icalendar-use-deadline '(event-if-todo event-if-not-todo todo-due)
                    org-icalendar-alarm-time 60)))
#+END_SRC

**** org-page

I would like to convert my website from using hugo to something else
that I can work with nicely from inside Emacs.  I wonder if org-page
will do the trick.

#+BEGIN_SRC emacs-lisp
  (use-package org-page
    :config (progn
              (setq op/site-domain "https://alanpearce.uk/"
                    op/repository-directory "~/projects/alanpearce/"
                    op/personal-github-link "https://github.com/alanpearce")))
#+END_SRC

* Music
Emacs actually supports playing music via mpd.

#+BEGIN_SRC emacs-lisp
  (use-package mpc
    :defer t
    :config (progn
              (setq mpc-browser-tags '(Genre Albumartist|Composer|Performer Album|Playlist))))
#+END_SRC
* Programming
** flycheck

On-the-fly error checking in programming modes?  Yes please.

#+BEGIN_SRC emacs-lisp
  (use-package flycheck
    :diminish " ✓"
    :defer 5
    :config (progn
              (global-flycheck-mode)
              (setq flycheck-check-syntax-automatically '(save new-line mode-enabled))))
#+END_SRC

** golang

Go has a few packages to inter-operate with other emacs packages.

#+BEGIN_SRC emacs-lisp
  (use-package company-go
    :commands company-go
    :config (progn
              (setq company-go-show-annotation t))
    :init (progn
            (defun ap/company-go-setup ()
              (set (make-local-variable 'company-backends)
                   '(company-go)))
            (add-hook 'go-mode-hook #'ap/company-go-setup)))

  (use-package go-eldoc
    :commands go-eldoc-setup
    :init (progn
            (add-hook 'go-mode-hook #'go-eldoc-setup)))

  (use-package go-projectile
    :defer t
    :config (progn
              (setq go-projectile-switch-gopath 'maybe)))


#+END_SRC

** ggtags

A nice completion backend for programming modes.

#+BEGIN_SRC emacs-lisp
  (use-package ggtags
    :commands turn-on-ggtags-mode
    :functions (ggtags-navigation-mode-abort)
    :config (progn
              (bind-key "q" #'ggtags-navigation-mode-abort ggtags-navigation-mode-map))
    :init (progn
            (defun turn-on-ggtags-mode ()
              (interactive)
              (ggtags-mode 1))
            (add-hook 'c-mode-common-hook #'turn-on-ggtags-mode)))
#+END_SRC

** Lisps

*** All

Lisp modes don’t seem to have a common ancestor.  So I made a custom
hook which I trigger in every lispy-mode.

#+BEGIN_SRC emacs-lisp
  (defcustom lisp-mode-common-hook nil
    "Hook run when entering any Lisp mode."
    :type 'hook
    :group 'lisp)

  (defun ap/lisp-setup ()
    (run-hooks 'lisp-mode-common-hook))
#+END_SRC

**** Redshank

Lisp syntax allows for really easy refactoring.  Redshank gives some
operations that aren’t part of paredit, like extracting variables into
let bindings.
#+BEGIN_SRC emacs-lisp
  (use-package redshank
    :diminish " Λ"
    :after (paredit)
    :config (progn
              (add-hook 'lisp-mode-common-hook #'turn-on-redshank-mode)))
#+END_SRC

*** Emacs Lisp

Customise the modeline-display of =emacs-lisp-mode=.  Then make sure
it runs the common lisp hooks.

#+BEGIN_SRC emacs-lisp
  (add-hook 'emacs-lisp-mode-hook #'ap/lisp-setup)
  (add-hook 'emacs-lisp-mode-hook #'eldoc-mode)
#+END_SRC

Go-to function for elisp.  Except it works through the entire Emacs ecosystem.

#+BEGIN_SRC emacs-lisp
  (use-package elisp-slime-nav
    :commands elisp-slime-nav-mode
    :diminish elisp-slime-nav-mode
    :init (progn
            (add-hook 'emacs-lisp-mode-hook #'elisp-slime-nav-mode)))
#+END_SRC

Interactive elisp

#+BEGIN_SRC emacs-lisp
  (use-package ielm
    :defer t
    :ensure nil
    :config (progn
              (add-hook 'ielm-mode-hook (lambda ()
                                          (run-hooks 'lisp-mode-common-hook)))))
#+END_SRC

*** Scheme & Lisp

I don’t work with these as often as I would like

#+BEGIN_SRC emacs-lisp
  (add-hook 'scheme-mode-hook #'ap/lisp-setup)
  (add-hook 'lisp-mode-hook #'ap/lisp-setup)
  (defun set-common-lisp-indentation ()
    (set (make-local-variable 'lisp-indent-function)
         #'common-lisp-indent-function))
  (add-hook 'lisp-mode-hook #'set-common-lisp-indentation)
#+END_SRC

**** geiser

A REPL thing for Scheme.  Hopefully I’ll get to use it more in the
future.

#+BEGIN_SRC emacs-lisp
  (use-package geiser
    :commands (geiser-mode
               geiser
               run-geiser
               run-racket))
#+END_SRC

**** slime

A REPL thing (and more) for Lisp.

#+BEGIN_SRC emacs-lisp
  (use-package slime
    :commands (slime)
    :config (progn
              (let ((ql-slime-helper (expand-file-name "~/quicklisp/slime-helper.el")))
                (if (file-exists-p ql-slime-helper)
                    (load ql-slime-helper))
                (slime-setup))
              (setq inferior-lisp-program (executable-find "sbcl"))))
#+END_SRC

*** Clojure

#+BEGIN_SRC emacs-lisp
  (use-package clojure-mode
    :defer t
    :init (progn
            (add-hook 'cider-repl-mode-hook (lambda () (highlight-changes-mode -1)))
            (add-hook 'clojure-mode-hook #'ap/lisp-setup)))

  (use-package clj-refactor
    :defer t
    :functions (clj-refactor-mode cljr-add-keybindings-with-prefix)
    :config (progn
              (cljr-add-keybindings-with-prefix "C-c C-m"))
    :init (progn
            (defun turn-on-clj-refactor-mode ()
              (clj-refactor-mode 1))
            (add-hook 'clojure-mode-hook #'turn-on-clj-refactor-mode)))
#+END_SRC

**** cider

A REPL thing for Clojure

#+BEGIN_SRC emacs-lisp
  (use-package cider
    :defer t
    :config (progn
              (setq nrepl-hide-special-buffers t)
              (unbind-key "C-c C-f" cider-mode-map)
              (add-hook 'cider-mode-hook #'eldoc-mode)))
#+END_SRC

** Auto-compile

Auto-compile emacs lisp when saving.
#+BEGIN_SRC emacs-lisp
  (use-package auto-compile
    :defer t
    :init (add-hook 'emacs-lisp-mode-hook #'auto-compile-on-save-mode))
#+END_SRC

** cc-mode

Although I don’t use C or C++, setting up the mode is helpful because
quite a few other modes are derived from it.

#+BEGIN_SRC emacs-lisp
  (use-package cc-mode
    :defer 5
    :init (progn
            (add-hook 'c-mode-common-hook #'electric-indent-mode))
    :config (progn
              (setq c-default-style '((java-mode . "java")
                                      (awk-mode . "awk")
                                      (other . "k&r"))
                    c-basic-offset 4)
              (c-set-offset 'case-label '+)))
#+END_SRC

** quickrun

It’s nice to be able to quickly evaluate some code.  Although I don’t
really seem to use it.
#+BEGIN_SRC emacs-lisp
  (use-package quickrun
    :bind (("C-c C-e" . quickrun)))
#+END_SRC

** Scala

Let’s try using Scala.

#+BEGIN_SRC emacs-lisp
  (use-package scala-mode
    :pin melpa-stable)
#+END_SRC

And add ensime, an IDE-style environment.

#+BEGIN_SRC emacs-lisp
  (use-package ensime
    :pin melpa-stable)
#+END_SRC

** Web development

*** js2-mode

This mode is really great for editing Javascript.  It turns code into
an AST internally, so it can work with it almost like a lisp.  I don’t
think there’s anything as good as paredit/redshank for refactoring in
it though

#+BEGIN_SRC emacs-lisp
  (use-package js2-mode
    :mode (("\\.js\\'" . js2-mode)
           ("\\.jsx\\'" . js2-jsx-mode))
    :interpreter ("node" . js2-mode)
    :functions js2-next-error
    :config (progn
              (define-key js2-mode-map [menu-bar Javascript] nil)
              (defun js2--imenu-around (do-it name)
                "Don't create a menu from js2-mode"
                (if (and (not (string-equal name "IM-Javascript-IDE"))
                         (fboundp #'do-it))
                    (do-it name)))
              (advice-add 'imenu-add-to-menubar :around #'js2--imenu-around)
              (defun ap/javascript-setup ()
                (auto-indent-mode -1))
              (defun ap/js2-prev-error ()
                (interactive)
                (js2-next-error -1))
              (bind-key "M-g M-n" #'js2-next-error js2-mode-map)
              (bind-key "M-g M-p" #'ap/js2-prev-error js2-mode-map)
              (add-hook 'js2-mode-hook #'ap/javascript-setup)
              (setq js2-basic-offset 2
                    js2-include-node-externs t)))
#+END_SRC

**** jade (not pug)

Javascript with an inferior node.js process and a debugger?  Awesome.

To debug with node, use version 6.9.1 or later of node and run it with
~--inspect~ and, to break on the first line, ~--debug-brk~.

For Chrom*, it needs to be launched with ~--remote-debugging-port=9222~

#+BEGIN_SRC emacs-lisp
  (use-package jade
    :config (progn
              (add-hook 'js2-mode-hook #'jade-interaction-mode)))
#+END_SRC

*** coffee-mode

#+BEGIN_SRC emacs-lisp
  (use-package coffee-mode
    :mode ("\\.coffee\\'" . coffee-mode)
    :config (progn
              (setq coffee-indent-like-python-mode t)))
#+END_SRC

*** tern

Tern understands javascript.  It adds really clever documented
completions, besides other IDE-like things.

#+BEGIN_SRC emacs-lisp
  (use-package tern
    :commands ap/enable-tern
    :if (executable-find "tern")
    :defer 5
    :config (progn
              (setq tern-command (list (executable-find "tern")))
              (defun ap/enable-tern ()
                (tern-mode 1))
              (add-hook 'js2-mode-hook #'ap/enable-tern)
              (add-hook 'web-mode-hook #'ap/enable-tern)))

  (with-eval-after-load 'tern
    (use-package company-tern))
#+END_SRC

*** json-mode

#+BEGIN_SRC emacs-lisp
  (use-package json-mode
    :mode (("\\.json\\'" . json-mode)
           ("\\.sailsrc\\'" . json-mode)
           ("composer\\.lock\\'" . json-mode)
           ("\\.tern-project\\'" . json-mode)))
#+END_SRC

*** restclient

Restclient is really nice.  It’s like a scratchpad for HTTP api
calls.  Feels a bit like using =org-babel=.  I wonder if there’s an
integration between the two yet.

#+BEGIN_SRC emacs-lisp
  (use-package restclient
    :mode ("\\.api\\'" . restclient-mode)
    :config (progn
              (defun imenu-restclient-sections ()
                (setq imenu-prev-index-position-function nil)
                (add-to-list 'imenu-generic-expression '("Services" "^## ?\\(.+\\)$" 1) t)
                (add-to-list 'imenu-generic-expression '("Calls" "^# ?\\(.+\\)$" 1) t))
              (add-hook 'restclient-mode-hook #'imenu-restclient-sections)))
#+END_SRC

*** sgml-mode

This is for HTML, since old versions of HTML were derived from SGML.
#+BEGIN_SRC emacs-lisp
  (use-package sgml-mode
    :defer t
    :config (setq sgml-basic-offset 2))
#+END_SRC

*** emmet-mode

Emmet is really nice to write HTML quickly.  Especially with
frameworks that require multiple nested elements to do anything useful.
#+BEGIN_SRC emacs-lisp
  (use-package emmet-mode
    :commands (emmet-mode)
    :diminish (emmet-mode . " >")
    :init (progn
            (add-hook 'web-mode-hook #'emmet-mode)))
#+END_SRC

*** web-mode

This mode handles just about every templating language out ther, which
is really nice, because it handles the HTML part the same way in all
of them as well.

#+BEGIN_SRC emacs-lisp
  (use-package web-mode
    :mode (("/views/.*\\.php\\'" . web-mode)
           ("\\.html\\'" . web-mode)
           ("/templates/.*\\.php\\'" . web-mode)
           ("\\.ejs\\'" . web-mode))
    :config (progn
              (setq web-mode-code-indent-offset 2
                    web-mode-css-indent-offset 2
                    web-mode-markup-indent-offset 2
                    web-mode-style-padding 0
                    web-mode-script-padding 0
                    web-mode-comment-style 2
                    web-mode-enable-auto-pairing nil
                    web-mode-enable-auto-quoting nil)
              (sp-local-pair '(web-mode) "<%" "%>")))
#+END_SRC

I derived a mode for twig, in order to use its =mode-hook=.

#+BEGIN_SRC emacs-lisp
  (define-derived-mode twig-mode web-mode "Twig")
  (add-to-list 'auto-mode-alist '("\\.html\\.twig\\'" . twig-mode))
#+END_SRC

* Spelling

#+BEGIN_SRC emacs-lisp
  (use-package ispell
    :bind (("<f8>" . ispell-word))
    :config (progn
              (cond
               ((executable-find "aspell") (setq ispell-program-name "aspell"
                                                 ispell-dictionary "british"
                                                 ispell-really-aspell t
                                                 ispell-really-hunspell nil))
               ((executable-find "hunspell") (setq ispell-program-name "hunspell"
                                                   ispell-really-aspell nil
                                                   ispell-really-hunspell t)))))
#+END_SRC

* Scripting

Make a shell-script buffer executable after saving it, if it has a shebang.

#+BEGIN_SRC emacs-lisp
  (add-hook 'after-save-hook
            #'executable-make-buffer-file-executable-if-script-p)

  (use-package sh-script
    :mode (("\\.zsh\\'" . shell-script-mode)
           ("zshenv\\'" . shell-script-mode)
           ("zshrc\\'"  . shell-script-mode))
    :config (setq sh-shell-file "/usr/bin/env zsh"
                  sh-indentation 2
                  sh-basic-offset 2))
#+END_SRC

#+BEGIN_SRC emacs-lisp
  (add-hook 'shell-mode-hook 'ansi-color-for-comint-mode-on)
#+END_SRC

** eshell

I should try to get into the habit of using this more.  It’s really
nice, when I remember to use it.

#+BEGIN_SRC emacs-lisp
  (use-package eshell
    :bind ("C-c s" .  eshell)
    :config (progn
              (setq eshell-directory-name "~/.emacs.d/eshell")
              (add-hook 'eshell-load-hook (lambda ()
                                            (bind-key "C-c C-l" #'counsel-esh-history eshell-mode-map)))))

  (use-package em-smart
    :ensure nil
    :commands eshell-smart-initialize
    :init (progn
            (add-hook 'eshell-load-hook #'eshell-smart-initialize))
    :config (progn
              (setq eshell-where-to-jump 'begin
                    eshell-review-quick-commands nil
                    eshell-smart-space-goes-to-end t)))

  (autoload #'eshell/cd "em-dirs")
  (defun eshell-goto-current-dir (&optional arg)
    (interactive "P")
    (let ((dir default-directory))
      (eshell arg)
      (eshell/cd dir)))
  (bind-key "C-c S" #'eshell-goto-current-dir)


#+END_SRC

*** Shells

#+BEGIN_SRC emacs-lisp
  (use-package shell
    :defer t
    :ensure nil
    :config (define-key shell-mode-map
              (kbd "C-d") 'comint-delchar-or-eof-or-kill-buffer))

  (use-package comint
    :defer t
    :ensure nil
    :config (bind-key "C-c C-l" #'counsel-shell-history comint-mode-map))

  (defun comint-delchar-or-eof-or-kill-buffer (arg)
    (interactive "p")
    (if (null (get-buffer-process (current-buffer)))
        (kill-buffer)
      (comint-delchar-or-maybe-eof arg)))
#+END_SRC

* Text editing

Emacs has an editor within.

#+BEGIN_SRC emacs-lisp
  (put 'upcase-region 'disabled nil)
  (put 'downcase-region 'disabled nil)
  (setq sentence-end-double-space t
        line-move-visual nil)
#+END_SRC

** align

=Align= is a useful command to line things up, once given some rules.
The most important one for me is JSON property alignment.

#+BEGIN_SRC emacs-lisp
  (use-package align
    :defer 10
    :ensure nil
    :config (progn
              (add-to-list 'align-rules-list
                           '(colon-key-value
                             (regexp . ":\\(\\s-*\\)")
                             (modes  . '(js2-mode))))))
#+END_SRC

** Clipboard

I like to use the clipboard more than the primary selection in X11.

#+BEGIN_SRC emacs-lisp
  (setq x-select-enable-clipboard t
        save-interprogram-paste-before-kill t)
  (if (functionp 'x-cut-buffer-or-selection-value)
      (setq interprogram-paste-function 'x-cut-buffer-or-selection-value))
  (when (boundp 'x-select-request-type)
    (setq x-select-request-type '(UTF8_STRING COMPOUND_TEXT TEXT STRING)))
#+END_SRC

** Selection

I’m quite used to deleting text by selecting it and typing.  Emacs has
a mode for that.

#+BEGIN_SRC emacs-lisp
  (delete-selection-mode t)
#+END_SRC

Sub-word movement is really nice for camel- and Pascal-case

#+BEGIN_SRC emacs-lisp
  (use-package subword
    :diminish subword-mode
    :init (global-subword-mode t))
#+END_SRC

I find that =zap-up-to-char= normally makes more sense to me than
=zap-to-char=.

#+BEGIN_SRC emacs-lisp
  (use-package misc
    :ensure nil
    :bind (("M-z" . zap-up-to-char)
           ("M-Z" . zap-to-char)))
#+END_SRC

Expanding the region by semantic units was something I quite liked
from Sublime Text.  As always, there’s a mode for that.

#+BEGIN_SRC emacs-lisp
  (use-package expand-region
    :bind ("C-M-SPC" . er/expand-region)
    :config (setq expand-region-fast-keys-enabled nil))
#+END_SRC

** Typography

I like using typographic quotes, but they’re complicated to insert manually.
them.

#+BEGIN_SRC emacs-lisp
  (electric-quote-mode)
#+END_SRC

** avy

Avy is a really nice way to move around files, like ace-jump-mode, but
somehow I prefer it.

#+BEGIN_SRC emacs-lisp
  (use-package avy
    :bind* (("M-g g" . avy-goto-line)
            ("M-g M-g" . avy-goto-line)
            ("C-|" . avy-goto-line)
            ("M-r" . avy-goto-word-1)
            ("C-c SPC" . avy-goto-char-timer))
    :config (progn
              (avy-setup-default)
              (setq avy-all-windows nil
                    avy-keys '(?a ?r ?s ?t ?d ?h ?n ?e ?i ?\;))))
#+END_SRC

** goto-chg

This is like popping the mark, only it filters to only change areas
and doesn’t go back to the same place more than once.

#+BEGIN_SRC emacs-lisp
  (use-package goto-chg
    :bind ("C-c C-SPC" . goto-last-change))
#+END_SRC

** multiple-cursors

I mentioned before that I’d used Sublime Text before.  Multiple
cursors was one of my favourite features, so I was really happy when I
saw that multiple-cursors was released for Emacs.

#+BEGIN_SRC emacs-lisp
  (use-package multiple-cursors
    :defer 1
    :config (progn
              (bind-key "C-." #'mc/mark-next-like-this)
              (bind-key "C-," #'mc/mark-previous-like-this)
              (bind-key "M-<f3>" #'mc/mark-all-like-this-dwim)
              (bind-key "C-<f3>" #'mc/mark-more-like-this-extended)
              (bind-key "C-S-L" #'mc/edit-lines)))
#+END_SRC

** paredit

Balanced parentheses in lisps are nice, but all the refactoring and
movement commands are much more interesting.

#+BEGIN_SRC emacs-lisp
  (use-package paredit
    :diminish "()"
    :config (progn
              (add-hook 'lisp-mode-common-hook #'enable-paredit-mode)
              (put #'paredit-forward-delete 'delete-selection 'supersede)
              (put #'paredit-backward-delete 'delete-selection 'supersede)
              (add-hook 'eval-expression-minibuffer-setup-hook #'enable-paredit-mode)))
#+END_SRC

** smartparens

I like to use smartparens where paredit isn’t already useful.  Somehow
I didn’t find smartparens’ implementation of paredit style to be as
nice as the real version

#+BEGIN_SRC emacs-lisp
  (eval-when-compile (require 'smartparens nil :noerror))
  (use-package smartparens-config
    :ensure smartparens
    :config (progn
              (sp-use-smartparens-bindings)
              (setq sp-highlight-pair-overlay nil)
              (fset 'wrap-with-paren "\C-](") ;; `sp-select-next-thing-exchange'
              (bind-key "C-(" #'wrap-with-paren smartparens-mode-map)
              (bind-key "C-)" #'sp-forward-slurp-sexp smartparens-mode-map)
              (bind-key "M-<backspace>" #'backward-kill-word smartparens-mode-map)
              (bind-key "M-?" #'sp-convolute-sexp smartparens-mode-map)
              (bind-key "C-M-t" #'sp-transpose-sexp smartparens-mode-map)
              (bind-key "M-R" #'sp-raise-sexp smartparens-mode-map)
              (bind-key "M-S" #'sp-splice-sexp smartparens-mode-map)
              (bind-key "C-M-s" #'sp-split-sexp smartparens-mode-map)
              (bind-key "M-J" #'sp-join-sexp smartparens-mode-map)
              (bind-key "M-<up>" #'sp-splice-sexp-killing-backward smartparens-mode-map)
              (bind-key "M-<down>" #'sp-splice-sexp-killing-forward smartparens-mode-map)
              (bind-key "C-M-S-k" #'sp-kill-hybrid-sexp smartparens-mode-map)
              (bind-key "C-S-<right>" #'sp-slurp-hybrid-sexp smartparens-mode-map)
              (sp-with-modes '(twig-mode)
                (sp-local-pair "{%" "%}")
                (sp-local-pair "{{" "}}"))
              (show-smartparens-global-mode t)
              (smartparens-global-strict-mode t)
              (add-hook 'lisp-mode-common-hook #'turn-off-smartparens-mode)
              (add-hook 'coffee-mode-hook #'turn-off-smartparens-mode)))
#+END_SRC

** smart-scan

Move between instances of a symbol

#+BEGIN_SRC emacs-lisp
  (use-package smartscan
    :config (progn
              (smartscan-mode 1)))
#+END_SRC

** move-text

Transposing lines, made easier.

#+BEGIN_SRC emacs-lisp
  (use-package move-text
    :config (move-text-default-bindings))
#+END_SRC

** undo-tree

Emacs’ default handling of undo is a bit confusing.  Undo-tree makes
it much clearer.  It’s especially helpful for protoyping and refactoring.

#+BEGIN_SRC emacs-lisp
  (use-package undo-tree
    :config (progn
              (global-undo-tree-mode)
              ;; Keep region when undoing in region
              (defadvice undo-tree-undo (around keep-region activate)
                (if (use-region-p)
                    (let ((m (set-marker (make-marker) (mark)))
                          (p (set-marker (make-marker) (point))))
                      ad-do-it
                      (goto-char p)
                      (set-mark m)
                      (set-marker p nil)
                      (set-marker m nil))
                  ad-do-it)))
    :diminish undo-tree-mode)
#+END_SRC

** visual-regexp

I don’t always remember exactly how Emacs’ regular expressions work,
so this package is pretty useful because it highlights everything in
the buffer for me.

#+BEGIN_SRC emacs-lisp
  (use-package visual-regexp
    :bind (("C-c r" . vr/replace)
           ("C-c q" . vr/query-replace)
           ("C-c m" . vc/mc-mark)))
#+END_SRC
* Tangling

Taken from [[https://github.com/larstvei/dot-emacs/blob/master/init.org][larstvei/dot-emacs]].  I changed it so that it would work with
my current dotfiles repository structure and work asynchronously,
thanks to [[https://github.com/jwiegley/emacs-async][jwiegley/emacs-async]].

We can use =C-c C-v t= to run =org-babel-tangle=, which extracts the
code blocks from the current file into a source-specific file (in this
case a =.el=-file).

To avoid doing this each time a change is made we can add a function
to the =after-save-hook= ensuring to always tangle and byte-compile
the =org=-document after changes.

#+BEGIN_SRC emacs-lisp
  (use-package async
    :commands (async-start)
    :defer 2)

  (defun tangle-if-init ()
    "If the current buffer is 'init.org' the code-blocks are
    tangled, and the tangled file is compiled."

    (when (string-suffix-p "init.org" (buffer-file-name))
      (tangle-init)))

  (defun tangle-init-sync ()
    (interactive)
    (message "Tangling init")
    ;; Avoid running hooks when tangling.
    (let ((prog-mode-hook nil)
          (src  (expand-file-name "init.org" user-emacs-directory))
          (dest (expand-file-name "init.el"  user-emacs-directory)))
      (require 'ob-tangle)
      (org-babel-tangle-file src dest)
      (if (byte-compile-file dest)
          (byte-compile-dest-file dest)
        (with-current-buffer byte-compile-log-buffer
          (buffer-string)))))

  (defun tangle-init ()
    "Tangle init.org asynchronously."

    (interactive)
    (message "Tangling init")
    (async-start
     (symbol-function #'tangle-init-sync)
     (lambda (result)
       (message "Init tangling completed: %s" result))))
#+END_SRC

# Local Variables:
# eval: (when (fboundp #'tangle-if-init) (add-hook 'after-save-hook #'tangle-if-init))
# End:
* End

Start a server if possible.  A daemon is already a server.
#+BEGIN_SRC emacs-lisp
  (run-with-idle-timer 2 nil (lambda ()
                               (unless (daemonp)
                                 (require 'server)
                                 (unless (server-running-p server-name)
                                   (server-start)))))
  (setq gc-cons-threshold 800000
        file-name-handler-alist '(("\\(?:\\.dz\\|\\.txz\\|\\.xz\\|\\.lzma\\|\\.lz\\|\\.g?z\\|\\.\\(?:tgz\\|svgz\\|sifz\\)\\|\\.tbz2?\\|\\.bz2\\|\\.Z\\)\\(?:~\\|\\.~[-[:alnum:]:#@^._]+\\(?:~[[:digit:]]+\\)?~\\)?\\'" . jka-compr-handler)
                                  ("\\.gpg\\(~\\|\\.~[0-9]+~\\)?\\'" . epa-file-handler)
                                  ("\\`/[^/]*\\'" . tramp-completion-file-name-handler)
                                  ("\\`/[^/|:][^/|]*:" . tramp-file-name-handler)
                                  ("\\`/:" . file-name-non-special)))
#+END_SRC