about summary refs log tree commit diff
path: root/vim/.vim/autoload/plug.vim
blob: 143c377c7d20068ad3d31fca1004cc939ed8e494 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
" vim-plug: Vim plugin manager
" ============================
"
" Download plug.vim and put it in ~/.vim/autoload
"
"   curl -fLo ~/.vim/autoload/plug.vim --create-dirs \
"     https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim
"
" Edit your .vimrc
"
"   call plug#begin('~/.vim/plugged')
"
"   " Make sure you use single quotes
"
"   " Shorthand notation; fetches https://github.com/junegunn/vim-easy-align
"   Plug 'junegunn/vim-easy-align'
"
"   " Any valid git URL is allowed
"   Plug 'https://github.com/junegunn/vim-github-dashboard.git'
"
"   " Multiple Plug commands can be written in a single line using | separators
"   Plug 'SirVer/ultisnips' | Plug 'honza/vim-snippets'
"
"   " On-demand loading
"   Plug 'scrooloose/nerdtree', { 'on':  'NERDTreeToggle' }
"   Plug 'tpope/vim-fireplace', { 'for': 'clojure' }
"
"   " Using a non-master branch
"   Plug 'rdnetto/YCM-Generator', { 'branch': 'stable' }
"
"   " Using a tagged release; wildcard allowed (requires git 1.9.2 or above)
"   Plug 'fatih/vim-go', { 'tag': '*' }
"
"   " Plugin options
"   Plug 'nsf/gocode', { 'tag': 'v.20150303', 'rtp': 'vim' }
"
"   " Plugin outside ~/.vim/plugged with post-update hook
"   Plug 'junegunn/fzf', { 'dir': '~/.fzf', 'do': './install --all' }
"
"   " Unmanaged plugin (manually installed and updated)
"   Plug '~/my-prototype-plugin'
"
"   " Initialize plugin system
"   call plug#end()
"
" Then reload .vimrc and :PlugInstall to install plugins.
"
" Plug options:
"
"| Option                  | Description                                      |
"| ----------------------- | ------------------------------------------------ |
"| `branch`/`tag`/`commit` | Branch/tag/commit of the repository to use       |
"| `rtp`                   | Subdirectory that contains Vim plugin            |
"| `dir`                   | Custom directory for the plugin                  |
"| `as`                    | Use different name for the plugin                |
"| `do`                    | Post-update hook (string or funcref)             |
"| `on`                    | On-demand loading: Commands or `<Plug>`-mappings |
"| `for`                   | On-demand loading: File types                    |
"| `frozen`                | Do not update unless explicitly specified        |
"
" More information: https://github.com/junegunn/vim-plug
"
"
" Copyright (c) 2017 Junegunn Choi
"
" MIT License
"
" Permission is hereby granted, free of charge, to any person obtaining
" a copy of this software and associated documentation files (the
" "Software"), to deal in the Software without restriction, including
" without limitation the rights to use, copy, modify, merge, publish,
" distribute, sublicense, and/or sell copies of the Software, and to
" permit persons to whom the Software is furnished to do so, subject to
" the following conditions:
"
" The above copyright notice and this permission notice shall be
" included in all copies or substantial portions of the Software.
"
" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
" EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
" NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
" LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
" OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
" WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

if exists('g:loaded_plug')
  finish
endif
let g:loaded_plug = 1

let s:cpo_save = &cpo
set cpo&vim

let s:plug_src = 'https://github.com/junegunn/vim-plug.git'
let s:plug_tab = get(s:, 'plug_tab', -1)
let s:plug_buf = get(s:, 'plug_buf', -1)
let s:mac_gui = has('gui_macvim') && has('gui_running')
let s:is_win = has('win32') || has('win64')
let s:nvim = has('nvim-0.2') || (has('nvim') && exists('*jobwait') && !s:is_win)
let s:vim8 = has('patch-8.0.0039') && exists('*job_start')
let s:me = resolve(expand('<sfile>:p'))
let s:base_spec = { 'branch': 'master', 'frozen': 0 }
let s:TYPE = {
\   'string':  type(''),
\   'list':    type([]),
\   'dict':    type({}),
\   'funcref': type(function('call'))
\ }
let s:loaded = get(s:, 'loaded', {})
let s:triggers = get(s:, 'triggers', {})

function! plug#begin(...)
  if a:0 > 0
    let s:plug_home_org = a:1
    let home = s:path(fnamemodify(expand(a:1), ':p'))
  elseif exists('g:plug_home')
    let home = s:path(g:plug_home)
  elseif !empty(&rtp)
    let home = s:path(split(&rtp, ',')[0]) . '/plugged'
  else
    return s:err('Unable to determine plug home. Try calling plug#begin() with a path argument.')
  endif
  if fnamemodify(home, ':t') ==# 'plugin' && fnamemodify(home, ':h') ==# s:first_rtp
    return s:err('Invalid plug home. '.home.' is a standard Vim runtime path and is not allowed.')
  endif

  let g:plug_home = home
  let g:plugs = {}
  let g:plugs_order = []
  let s:triggers = {}

  call s:define_commands()
  return 1
endfunction

function! s:define_commands()
  command! -nargs=+ -bar Plug call plug#(<args>)
  if !executable('git')
    return s:err('`git` executable not found. Most commands will not be available. To suppress this message, prepend `silent!` to `call plug#begin(...)`.')
  endif
  command! -nargs=* -bar -bang -complete=customlist,s:names PlugInstall call s:install(<bang>0, [<f-args>])
  command! -nargs=* -bar -bang -complete=customlist,s:names PlugUpdate  call s:update(<bang>0, [<f-args>])
  command! -nargs=0 -bar -bang PlugClean call s:clean(<bang>0)
  command! -nargs=0 -bar PlugUpgrade if s:upgrade() | execute 'source' s:esc(s:me) | endif
  command! -nargs=0 -bar PlugStatus  call s:status()
  command! -nargs=0 -bar PlugDiff    call s:diff()
  command! -nargs=? -bar -bang -complete=file PlugSnapshot call s:snapshot(<bang>0, <f-args>)
endfunction

function! s:to_a(v)
  return type(a:v) == s:TYPE.list ? a:v : [a:v]
endfunction

function! s:to_s(v)
  return type(a:v) == s:TYPE.string ? a:v : join(a:v, "\n") . "\n"
endfunction

function! s:glob(from, pattern)
  return s:lines(globpath(a:from, a:pattern))
endfunction

function! s:source(from, ...)
  let found = 0
  for pattern in a:000
    for vim in s:glob(a:from, pattern)
      execute 'source' s:esc(vim)
      let found = 1
    endfor
  endfor
  return found
endfunction

function! s:assoc(dict, key, val)
  let a:dict[a:key] = add(get(a:dict, a:key, []), a:val)
endfunction

function! s:ask(message, ...)
  call inputsave()
  echohl WarningMsg
  let answer = input(a:message.(a:0 ? ' (y/N/a) ' : ' (y/N) '))
  echohl None
  call inputrestore()
  echo "\r"
  return (a:0 && answer =~? '^a') ? 2 : (answer =~? '^y') ? 1 : 0
endfunction

function! s:ask_no_interrupt(...)
  try
    return call('s:ask', a:000)
  catch
    return 0
  endtry
endfunction

function! plug#end()
  if !exists('g:plugs')
    return s:err('Call plug#begin() first')
  endif

  if exists('#PlugLOD')
    augroup PlugLOD
      autocmd!
    augroup END
    augroup! PlugLOD
  endif
  let lod = { 'ft': {}, 'map': {}, 'cmd': {} }

  if exists('g:did_load_filetypes')
    filetype off
  endif
  for name in g:plugs_order
    if !has_key(g:plugs, name)
      continue
    endif
    let plug = g:plugs[name]
    if get(s:loaded, name, 0) || !has_key(plug, 'on') && !has_key(plug, 'for')
      let s:loaded[name] = 1
      continue
    endif

    if has_key(plug, 'on')
      let s:triggers[name] = { 'map': [], 'cmd': [] }
      for cmd in s:to_a(plug.on)
        if cmd =~? '^<Plug>.\+'
          if empty(mapcheck(cmd)) && empty(mapcheck(cmd, 'i'))
            call s:assoc(lod.map, cmd, name)
          endif
          call add(s:triggers[name].map, cmd)
        elseif cmd =~# '^[A-Z]'
          let cmd = substitute(cmd, '!*$', '', '')
          if exists(':'.cmd) != 2
            call s:assoc(lod.cmd, cmd, name)
          endif
          call add(s:triggers[name].cmd, cmd)
        else
          call s:err('Invalid `on` option: '.cmd.
          \ '. Should start with an uppercase letter or `<Plug>`.')
        endif
      endfor
    endif

    if has_key(plug, 'for')
      let types = s:to_a(plug.for)
      if !empty(types)
        augroup filetypedetect
        call s:source(s:rtp(plug), 'ftdetect/**/*.vim', 'after/ftdetect/**/*.vim')
        augroup END
      endif
      for type in types
        call s:assoc(lod.ft, type, name)
      endfor
    endif
  endfor

  for [cmd, names] in items(lod.cmd)
    execute printf(
    \ 'command! -nargs=* -range -bang -complete=file %s call s:lod_cmd(%s, "<bang>", <line1>, <line2>, <q-args>, %s)',
    \ cmd, string(cmd), string(names))
  endfor

  for [map, names] in items(lod.map)
    for [mode, map_prefix, key_prefix] in
          \ [['i', '<C-O>', ''], ['n', '', ''], ['v', '', 'gv'], ['o', '', '']]
      execute printf(
      \ '%snoremap <silent> %s %s:<C-U>call <SID>lod_map(%s, %s, %s, "%s")<CR>',
      \ mode, map, map_prefix, string(map), string(names), mode != 'i', key_prefix)
    endfor
  endfor

  for [ft, names] in items(lod.ft)
    augroup PlugLOD
      execute printf('autocmd FileType %s call <SID>lod_ft(%s, %s)',
            \ ft, string(ft), string(names))
    augroup END
  endfor

  call s:reorg_rtp()
  filetype plugin indent on
  if has('vim_starting')
    if has('syntax') && !exists('g:syntax_on')
      syntax enable
    end
  else
    call s:reload_plugins()
  endif
endfunction

function! s:loaded_names()
  return filter(copy(g:plugs_order), 'get(s:loaded, v:val, 0)')
endfunction

function! s:load_plugin(spec)
  call s:source(s:rtp(a:spec), 'plugin/**/*.vim', 'after/plugin/**/*.vim')
endfunction

function! s:reload_plugins()
  for name in s:loaded_names()
    call s:load_plugin(g:plugs[name])
  endfor
endfunction

function! s:trim(str)
  return substitute(a:str, '[\/]\+$', '', '')
endfunction

function! s:version_requirement(val, min)
  for idx in range(0, len(a:min) - 1)
    let v = get(a:val, idx, 0)
    if     v < a:min[idx] | return 0
    elseif v > a:min[idx] | return 1
    endif
  endfor
  return 1
endfunction

function! s:git_version_requirement(...)
  if !exists('s:git_version')
    let s:git_version = map(split(split(s:system('git --version'))[2], '\.'), 'str2nr(v:val)')
  endif
  return s:version_requirement(s:git_version, a:000)
endfunction

function! s:progress_opt(base)
  return a:base && !s:is_win &&
        \ s:git_version_requirement(1, 7, 1) ? '--progress' : ''
endfunction

if s:is_win
  function! s:rtp(spec)
    return s:path(a:spec.dir . get(a:spec, 'rtp', ''))
  endfunction

  function! s:path(path)
    return s:trim(substitute(a:path, '/', '\', 'g'))
  endfunction

  function! s:dirpath(path)
    return s:path(a:path) . '\'
  endfunction

  function! s:is_local_plug(repo)
    return a:repo =~? '^[a-z]:\|^[%~]'
  endfunction
else
  function! s:rtp(spec)
    return s:dirpath(a:spec.dir . get(a:spec, 'rtp', ''))
  endfunction

  function! s:path(path)
    return s:trim(a:path)
  endfunction

  function! s:dirpath(path)
    return substitute(a:path, '[/\\]*$', '/', '')
  endfunction

  function! s:is_local_plug(repo)
    return a:repo[0] =~ '[/$~]'
  endfunction
endif

function! s:err(msg)
  echohl ErrorMsg
  echom '[vim-plug] '.a:msg
  echohl None
endfunction

function! s:warn(cmd, msg)
  echohl WarningMsg
  execute a:cmd 'a:msg'
  echohl None
endfunction

function! s:esc(path)
  return escape(a:path, ' ')
endfunction

function! s:escrtp(path)
  return escape(a:path, ' ,')
endfunction

function! s:remove_rtp()
  for name in s:loaded_names()
    let rtp = s:rtp(g:plugs[name])
    execute 'set rtp-='.s:escrtp(rtp)
    let after = globpath(rtp, 'after')
    if isdirectory(after)
      execute 'set rtp-='.s:escrtp(after)
    endif
  endfor
endfunction

function! s:reorg_rtp()
  if !empty(s:first_rtp)
    execute 'set rtp-='.s:first_rtp
    execute 'set rtp-='.s:last_rtp
  endif

  " &rtp is modified from outside
  if exists('s:prtp') && s:prtp !=# &rtp
    call s:remove_rtp()
    unlet! s:middle
  endif

  let s:middle = get(s:, 'middle', &rtp)
  let rtps     = map(s:loaded_names(), 's:rtp(g:plugs[v:val])')
  let afters   = filter(map(copy(rtps), 'globpath(v:val, "after")'), '!empty(v:val)')
  let rtp      = join(map(rtps, 'escape(v:val, ",")'), ',')
                 \ . ','.s:middle.','
                 \ . join(map(afters, 'escape(v:val, ",")'), ',')
  let &rtp     = substitute(substitute(rtp, ',,*', ',', 'g'), '^,\|,$', '', 'g')
  let s:prtp   = &rtp

  if !empty(s:first_rtp)
    execute 'set rtp^='.s:first_rtp
    execute 'set rtp+='.s:last_rtp
  endif
endfunction

function! s:doautocmd(...)
  if exists('#'.join(a:000, '#'))
    execute 'doautocmd' ((v:version > 703 || has('patch442')) ? '<nomodeline>' : '') join(a:000)
  endif
endfunction

function! s:dobufread(names)
  for name in a:names
    let path = s:rtp(g:plugs[name]).'/**'
    for dir in ['ftdetect', 'ftplugin']
      if len(finddir(dir, path))
        if exists('#BufRead')
          doautocmd BufRead
        endif
        return
      endif
    endfor
  endfor
endfunction

function! plug#load(...)
  if a:0 == 0
    return s:err('Argument missing: plugin name(s) required')
  endif
  if !exists('g:plugs')
    return s:err('plug#begin was not called')
  endif
  let names = a:0 == 1 && type(a:1) == s:TYPE.list ? a:1 : a:000
  let unknowns = filter(copy(names), '!has_key(g:plugs, v:val)')
  if !empty(unknowns)
    let s = len(unknowns) > 1 ? 's' : ''
    return s:err(printf('Unknown plugin%s: %s', s, join(unknowns, ', ')))
  end
  let unloaded = filter(copy(names), '!get(s:loaded, v:val, 0)')
  if !empty(unloaded)
    for name in unloaded
      call s:lod([name], ['ftdetect', 'after/ftdetect', 'plugin', 'after/plugin'])
    endfor
    call s:dobufread(unloaded)
    return 1
  end
  return 0
endfunction

function! s:remove_triggers(name)
  if !has_key(s:triggers, a:name)
    return
  endif
  for cmd in s:triggers[a:name].cmd
    execute 'silent! delc' cmd
  endfor
  for map in s:triggers[a:name].map
    execute 'silent! unmap' map
    execute 'silent! iunmap' map
  endfor
  call remove(s:triggers, a:name)
endfunction

function! s:lod(names, types, ...)
  for name in a:names
    call s:remove_triggers(name)
    let s:loaded[name] = 1
  endfor
  call s:reorg_rtp()

  for name in a:names
    let rtp = s:rtp(g:plugs[name])
    for dir in a:types
      call s:source(rtp, dir.'/**/*.vim')
    endfor
    if a:0
      if !s:source(rtp, a:1) && !empty(s:glob(rtp, a:2))
        execute 'runtime' a:1
      endif
      call s:source(rtp, a:2)
    endif
    call s:doautocmd('User', name)
  endfor
endfunction

function! s:lod_ft(pat, names)
  let syn = 'syntax/'.a:pat.'.vim'
  call s:lod(a:names, ['plugin', 'after/plugin'], syn, 'after/'.syn)
  execute 'autocmd! PlugLOD FileType' a:pat
  call s:doautocmd('filetypeplugin', 'FileType')
  call s:doautocmd('filetypeindent', 'FileType')
endfunction

function! s:lod_cmd(cmd, bang, l1, l2, args, names)
  call s:lod(a:names, ['ftdetect', 'after/ftdetect', 'plugin', 'after/plugin'])
  call s:dobufread(a:names)
  execute printf('%s%s%s %s', (a:l1 == a:l2 ? '' : (a:l1.','.a:l2)), a:cmd, a:bang, a:args)
endfunction

function! s:lod_map(map, names, with_prefix, prefix)
  call s:lod(a:names, ['ftdetect', 'after/ftdetect', 'plugin', 'after/plugin'])
  call s:dobufread(a:names)
  let extra = ''
  while 1
    let c = getchar(0)
    if c == 0
      break
    endif
    let extra .= nr2char(c)
  endwhile

  if a:with_prefix
    let prefix = v:count ? v:count : ''
    let prefix .= '"'.v:register.a:prefix
    if mode(1) == 'no'
      if v:operator == 'c'
        let prefix = "\<esc>" . prefix
      endif
      let prefix .= v:operator
    endif
    call feedkeys(prefix, 'n')
  endif
  call feedkeys(substitute(a:map, '^<Plug>', "\<Plug>", '') . extra)
endfunction

function! plug#(repo, ...)
  if a:0 > 1
    return s:err('Invalid number of arguments (1..2)')
  endif

  try
    let repo = s:trim(a:repo)
    let opts = a:0 == 1 ? s:parse_options(a:1) : s:base_spec
    let name = get(opts, 'as', fnamemodify(repo, ':t:s?\.git$??'))
    let spec = extend(s:infer_properties(name, repo), opts)
    if !has_key(g:plugs, name)
      call add(g:plugs_order, name)
    endif
    let g:plugs[name] = spec
    let s:loaded[name] = get(s:loaded, name, 0)
  catch
    return s:err(v:exception)
  endtry
endfunction

function! s:parse_options(arg)
  let opts = copy(s:base_spec)
  let type = type(a:arg)
  if type == s:TYPE.string
    let opts.tag = a:arg
  elseif type == s:TYPE.dict
    call extend(opts, a:arg)
    if has_key(opts, 'dir')
      let opts.dir = s:dirpath(expand(opts.dir))
    endif
  else
    throw 'Invalid argument type (expected: string or dictionary)'
  endif
  return opts
endfunction

function! s:infer_properties(name, repo)
  let repo = a:repo
  if s:is_local_plug(repo)
    return { 'dir': s:dirpath(expand(repo)) }
  else
    if repo =~ ':'
      let uri = repo
    else
      if repo !~ '/'
        throw printf('Invalid argument: %s (implicit `vim-scripts'' expansion is deprecated)', repo)
      endif
      let fmt = get(g:, 'plug_url_format', 'https://git::@github.com/%s.git')
      let uri = printf(fmt, repo)
    endif
    return { 'dir': s:dirpath(g:plug_home.'/'.a:name), 'uri': uri }
  endif
endfunction

function! s:install(force, names)
  call s:update_impl(0, a:force, a:names)
endfunction

function! s:update(force, names)
  call s:update_impl(1, a:force, a:names)
endfunction

function! plug#helptags()
  if !exists('g:plugs')
    return s:err('plug#begin was not called')
  endif
  for spec in values(g:plugs)
    let docd = join([s:rtp(spec), 'doc'], '/')
    if isdirectory(docd)
      silent! execute 'helptags' s:esc(docd)
    endif
  endfor
  return 1
endfunction

function! s:syntax()
  syntax clear
  syntax region plug1 start=/\%1l/ end=/\%2l/ contains=plugNumber
  syntax region plug2 start=/\%2l/ end=/\%3l/ contains=plugBracket,plugX
  syn match plugNumber /[0-9]\+[0-9.]*/ contained
  syn match plugBracket /[[\]]/ contained
  syn match plugX /x/ contained
  syn match plugDash /^-/
  syn match plugPlus /^+/
  syn match plugStar /^*/
  syn match plugMessage /\(^- \)\@<=.*/
  syn match plugName /\(^- \)\@<=[^ ]*:/
  syn match plugSha /\%(: \)\@<=[0-9a-f]\{4,}$/
  syn match plugTag /(tag: [^)]\+)/
  syn match plugInstall /\(^+ \)\@<=[^:]*/
  syn match plugUpdate /\(^* \)\@<=[^:]*/
  syn match plugCommit /^  \X*[0-9a-f]\{7,9} .*/ contains=plugRelDate,plugEdge,plugTag
  syn match plugEdge /^  \X\+$/
  syn match plugEdge /^  \X*/ contained nextgroup=plugSha
  syn match plugSha /[0-9a-f]\{7,9}/ contained
  syn match plugRelDate /([^)]*)$/ contained
  syn match plugNotLoaded /(not loaded)$/
  syn match plugError /^x.*/
  syn region plugDeleted start=/^\~ .*/ end=/^\ze\S/
  syn match plugH2 /^.*:\n-\+$/
  syn keyword Function PlugInstall PlugStatus PlugUpdate PlugClean
  hi def link plug1       Title
  hi def link plug2       Repeat
  hi def link plugH2      Type
  hi def link plugX       Exception
  hi def link plugBracket Structure
  hi def link plugNumber  Number

  hi def link plugDash    Special
  hi def link plugPlus    Constant
  hi def link plugStar    Boolean

  hi def link plugMessage Function
  hi def link plugName    Label
  hi def link plugInstall Function
  hi def link plugUpdate  Type

  hi def link plugError   Error
  hi def link plugDeleted Ignore
  hi def link plugRelDate Comment
  hi def link plugEdge    PreProc
  hi def link plugSha     Identifier
  hi def link plugTag     Constant

  hi def link plugNotLoaded Comment
endfunction

function! s:lpad(str, len)
  return a:str . repeat(' ', a:len - len(a:str))
endfunction

function! s:lines(msg)
  return split(a:msg, "[\r\n]")
endfunction

function! s:lastline(msg)
  return get(s:lines(a:msg), -1, '')
endfunction

function! s:new_window()
  execute get(g:, 'plug_window', 'vertical topleft new')
endfunction

function! s:plug_window_exists()
  let buflist = tabpagebuflist(s:plug_tab)
  return !empty(buflist) && index(buflist, s:plug_buf) >= 0
endfunction

function! s:switch_in()
  if !s:plug_window_exists()
    return 0
  endif

  if winbufnr(0) != s:plug_buf
    let s:pos = [tabpagenr(), winnr(), winsaveview()]
    execute 'normal!' s:plug_tab.'gt'
    let winnr = bufwinnr(s:plug_buf)
    execute winnr.'wincmd w'
    call add(s:pos, winsaveview())
  else
    let s:pos = [winsaveview()]
  endif

  setlocal modifiable
  return 1
endfunction

function! s:switch_out(...)
  call winrestview(s:pos[-1])
  setlocal nomodifiable
  if a:0 > 0
    execute a:1
  endif

  if len(s:pos) > 1
    execute 'normal!' s:pos[0].'gt'
    execute s:pos[1] 'wincmd w'
    call winrestview(s:pos[2])
  endif
endfunction

function! s:finish_bindings()
  nnoremap <silent> <buffer> R  :call <SID>retry()<cr>
  nnoremap <silent> <buffer> D  :PlugDiff<cr>
  nnoremap <silent> <buffer> S  :PlugStatus<cr>
  nnoremap <silent> <buffer> U  :call <SID>status_update()<cr>
  xnoremap <silent> <buffer> U  :call <SID>status_update()<cr>
  nnoremap <silent> <buffer> ]] :silent! call <SID>section('')<cr>
  nnoremap <silent> <buffer> [[ :silent! call <SID>section('b')<cr>
endfunction

function! s:prepare(...)
  if empty(getcwd())
    throw 'Invalid current working directory. Cannot proceed.'
  endif

  for evar in ['$GIT_DIR', '$GIT_WORK_TREE']
    if exists(evar)
      throw evar.' detected. Cannot proceed.'
    endif
  endfor

  call s:job_abort()
  if s:switch_in()
    if b:plug_preview == 1
      pc
    endif
    enew
  else
    call s:new_window()
  endif

  nnoremap <silent> <buffer> q  :if b:plug_preview==1<bar>pc<bar>endif<bar>bd<cr>
  if a:0 == 0
    call s:finish_bindings()
  endif
  let b:plug_preview = -1
  let s:plug_tab = tabpagenr()
  let s:plug_buf = winbufnr(0)
  call s:assign_name()

  for k in ['<cr>', 'L', 'o', 'X', 'd', 'dd']
    execute 'silent! unmap <buffer>' k
  endfor
  setlocal buftype=nofile bufhidden=wipe nobuflisted nolist noswapfile nowrap cursorline modifiable nospell
  setf vim-plug
  if exists('g:syntax_on')
    call s:syntax()
  endif
endfunction

function! s:assign_name()
  " Assign buffer name
  let prefix = '[Plugins]'
  let name   = prefix
  let idx    = 2
  while bufexists(name)
    let name = printf('%s (%s)', prefix, idx)
    let idx = idx + 1
  endwhile
  silent! execute 'f' fnameescape(name)
endfunction

function! s:chsh(swap)
  let prev = [&shell, &shellcmdflag, &shellredir]
  if s:is_win
    set shell=cmd.exe shellcmdflag=/c shellredir=>%s\ 2>&1
  elseif a:swap
    set shell=sh shellredir=>%s\ 2>&1
  endif
  return prev
endfunction

function! s:bang(cmd, ...)
  try
    let [sh, shellcmdflag, shrd] = s:chsh(a:0)
    " FIXME: Escaping is incomplete. We could use shellescape with eval,
    "        but it won't work on Windows.
    let cmd = a:0 ? s:with_cd(a:cmd, a:1) : a:cmd
    if s:is_win
      let batchfile = tempname().'.bat'
      call writefile(['@echo off', cmd], batchfile)
      let cmd = batchfile
    endif
    let g:_plug_bang = (s:is_win && has('gui_running') ? 'silent ' : '').'!'.escape(cmd, '#!%')
    execute "normal! :execute g:_plug_bang\<cr>\<cr>"
  finally
    unlet g:_plug_bang
    let [&shell, &shellcmdflag, &shellredir] = [sh, shellcmdflag, shrd]
    if s:is_win
      call delete(batchfile)
    endif
  endtry
  return v:shell_error ? 'Exit status: ' . v:shell_error : ''
endfunction

function! s:regress_bar()
  let bar = substitute(getline(2)[1:-2], '.*\zs=', 'x', '')
  call s:progress_bar(2, bar, len(bar))
endfunction

function! s:is_updated(dir)
  return !empty(s:system_chomp('git log --pretty=format:"%h" "HEAD...HEAD@{1}"', a:dir))
endfunction

function! s:do(pull, force, todo)
  for [name, spec] in items(a:todo)
    if !isdirectory(spec.dir)
      continue
    endif
    let installed = has_key(s:update.new, name)
    let updated = installed ? 0 :
      \ (a:pull && index(s:update.errors, name) < 0 && s:is_updated(spec.dir))
    if a:force || installed || updated
      execute 'cd' s:esc(spec.dir)
      call append(3, '- Post-update hook for '. name .' ... ')
      let error = ''
      let type = type(spec.do)
      if type == s:TYPE.string
        if spec.do[0] == ':'
          if !get(s:loaded, name, 0)
            let s:loaded[name] = 1
            call s:reorg_rtp()
          endif
          call s:load_plugin(spec)
          try
            execute spec.do[1:]
          catch
            let error = v:exception
          endtry
          if !s:plug_window_exists()
            cd -
            throw 'Warning: vim-plug was terminated by the post-update hook of '.name
          endif
        else
          let error = s:bang(spec.do)
        endif
      elseif type == s:TYPE.funcref
        try
          let status = installed ? 'installed' : (updated ? 'updated' : 'unchanged')
          call spec.do({ 'name': name, 'status': status, 'force': a:force })
        catch
          let error = v:exception
        endtry
      else
        let error = 'Invalid hook type'
      endif
      call s:switch_in()
      call setline(4, empty(error) ? (getline(4) . 'OK')
                                 \ : ('x' . getline(4)[1:] . error))
      if !empty(error)
        call add(s:update.errors, name)
        call s:regress_bar()
      endif
      cd -
    endif
  endfor
endfunction

function! s:hash_match(a, b)
  return stridx(a:a, a:b) == 0 || stridx(a:b, a:a) == 0
endfunction

function! s:checkout(spec)
  let sha = a:spec.commit
  let output = s:system('git rev-parse HEAD', a:spec.dir)
  if !v:shell_error && !s:hash_match(sha, s:lines(output)[0])
    let output = s:system(
          \ 'git fetch --depth 999999 && git checkout '.s:esc(sha).' --', a:spec.dir)
  endif
  return output
endfunction

function! s:finish(pull)
  let new_frozen = len(filter(keys(s:update.new), 'g:plugs[v:val].frozen'))
  if new_frozen
    let s = new_frozen > 1 ? 's' : ''
    call append(3, printf('- Installed %d frozen plugin%s', new_frozen, s))
  endif
  call append(3, '- Finishing ... ') | 4
  redraw
  call plug#helptags()
  call plug#end()
  call setline(4, getline(4) . 'Done!')
  redraw
  let msgs = []
  if !empty(s:update.errors)
    call add(msgs, "Press 'R' to retry.")
  endif
  if a:pull && len(s:update.new) < len(filter(getline(5, '$'),
                \ "v:val =~ '^- ' && stridx(v:val, 'Already up-to-date') < 0"))
    call add(msgs, "Press 'D' to see the updated changes.")
  endif
  echo join(msgs, ' ')
  call s:finish_bindings()
endfunction

function! s:retry()
  if empty(s:update.errors)
    return
  endif
  echo
  call s:update_impl(s:update.pull, s:update.force,
        \ extend(copy(s:update.errors), [s:update.threads]))
endfunction

function! s:is_managed(name)
  return has_key(g:plugs[a:name], 'uri')
endfunction

function! s:names(...)
  return sort(filter(keys(g:plugs), 'stridx(v:val, a:1) == 0 && s:is_managed(v:val)'))
endfunction

function! s:check_ruby()
  silent! ruby require 'thread'; VIM::command("let g:plug_ruby = '#{RUBY_VERSION}'")
  if !exists('g:plug_ruby')
    redraw!
    return s:warn('echom', 'Warning: Ruby interface is broken')
  endif
  let ruby_version = split(g:plug_ruby, '\.')
  unlet g:plug_ruby
  return s:version_requirement(ruby_version, [1, 8, 7])
endfunction

function! s:update_impl(pull, force, args) abort
  let sync = index(a:args, '--sync') >= 0 || has('vim_starting')
  let args = filter(copy(a:args), 'v:val != "--sync"')
  let threads = (len(args) > 0 && args[-1] =~ '^[1-9][0-9]*$') ?
                  \ remove(args, -1) : get(g:, 'plug_threads', 16)

  let managed = filter(copy(g:plugs), 's:is_managed(v:key)')
  let todo = empty(args) ? filter(managed, '!v:val.frozen || !isdirectory(v:val.dir)') :
                         \ filter(managed, 'index(args, v:key) >= 0')

  if empty(todo)
    return s:warn('echo', 'No plugin to '. (a:pull ? 'update' : 'install'))
  endif

  if !s:is_win && s:git_version_requirement(2, 3)
    let s:git_terminal_prompt = exists('$GIT_TERMINAL_PROMPT') ? $GIT_TERMINAL_PROMPT : ''
    let $GIT_TERMINAL_PROMPT = 0
    for plug in values(todo)
      let plug.uri = substitute(plug.uri,
            \ '^https://git::@github\.com', 'https://github.com', '')
    endfor
  endif

  if !isdirectory(g:plug_home)
    try
      call mkdir(g:plug_home, 'p')
    catch
      return s:err(printf('Invalid plug directory: %s. '.
              \ 'Try to call plug#begin with a valid directory', g:plug_home))
    endtry
  endif

  if has('nvim') && !exists('*jobwait') && threads > 1
    call s:warn('echom', '[vim-plug] Update Neovim for parallel installer')
  endif

  let use_job = s:nvim || s:vim8
  let python = (has('python') || has('python3')) && !use_job
  let ruby = has('ruby') && !use_job && (v:version >= 703 || v:version == 702 && has('patch374')) && !(s:is_win && has('gui_running')) && threads > 1 && s:check_ruby()

  let s:update = {
    \ 'start':   reltime(),
    \ 'all':     todo,
    \ 'todo':    copy(todo),
    \ 'errors':  [],
    \ 'pull':    a:pull,
    \ 'force':   a:force,
    \ 'new':     {},
    \ 'threads': (python || ruby || use_job) ? min([len(todo), threads]) : 1,
    \ 'bar':     '',
    \ 'fin':     0
  \ }

  call s:prepare(1)
  call append(0, ['', ''])
  normal! 2G
  silent! redraw

  let s:clone_opt = get(g:, 'plug_shallow', 1) ?
        \ '--depth 1' . (s:git_version_requirement(1, 7, 10) ? ' --no-single-branch' : '') : ''

  if has('win32unix')
    let s:clone_opt .= ' -c core.eol=lf -c core.autocrlf=input'
  endif

  " Python version requirement (>= 2.7)
  if python && !has('python3') && !ruby && !use_job && s:update.threads > 1
    redir => pyv
    silent python import platform; print platform.python_version()
    redir END
    let python = s:version_requirement(
          \ map(split(split(pyv)[0], '\.'), 'str2nr(v:val)'), [2, 6])
  endif

  if (python || ruby) && s:update.threads > 1
    try
      let imd = &imd
      if s:mac_gui
        set noimd
      endif
      if ruby
        call s:update_ruby()
      else
        call s:update_python()
      endif
    catch
      let lines = getline(4, '$')
      let printed = {}
      silent! 4,$d _
      for line in lines
        let name = s:extract_name(line, '.', '')
        if empty(name) || !has_key(printed, name)
          call append('$', line)
          if !empty(name)
            let printed[name] = 1
            if line[0] == 'x' && index(s:update.errors, name) < 0
              call add(s:update.errors, name)
            end
          endif
        endif
      endfor
    finally
      let &imd = imd
      call s:update_finish()
    endtry
  else
    call s:update_vim()
    while use_job && sync
      sleep 100m
      if s:update.fin
        break
      endif
    endwhile
  endif
endfunction

function! s:log4(name, msg)
  call setline(4, printf('- %s (%s)', a:msg, a:name))
  redraw
endfunction

function! s:update_finish()
  if exists('s:git_terminal_prompt')
    let $GIT_TERMINAL_PROMPT = s:git_terminal_prompt
  endif
  if s:switch_in()
    call append(3, '- Updating ...') | 4
    for [name, spec] in items(filter(copy(s:update.all), 'index(s:update.errors, v:key) < 0 && (s:update.force || s:update.pull || has_key(s:update.new, v:key))'))
      let [pos, _] = s:logpos(name)
      if !pos
        continue
      endif
      if has_key(spec, 'commit')
        call s:log4(name, 'Checking out '.spec.commit)
        let out = s:checkout(spec)
      elseif has_key(spec, 'tag')
        let tag = spec.tag
        if tag =~ '\*'
          let tags = s:lines(s:system('git tag --list '.s:shellesc(tag).' --sort -version:refname 2>&1', spec.dir))
          if !v:shell_error && !empty(tags)
            let tag = tags[0]
            call s:log4(name, printf('Latest tag for %s -> %s', spec.tag, tag))
            call append(3, '')
          endif
        endif
        call s:log4(name, 'Checking out '.tag)
        let out = s:system('git checkout -q '.s:esc(tag).' -- 2>&1', spec.dir)
      else
        let branch = s:esc(get(spec, 'branch', 'master'))
        call s:log4(name, 'Merging origin/'.branch)
        let out = s:system('git checkout -q '.branch.' -- 2>&1'
              \. (has_key(s:update.new, name) ? '' : ('&& git merge --ff-only origin/'.branch.' 2>&1')), spec.dir)
      endif
      if !v:shell_error && filereadable(spec.dir.'/.gitmodules') &&
            \ (s:update.force || has_key(s:update.new, name) || s:is_updated(spec.dir))
        call s:log4(name, 'Updating submodules. This may take a while.')
        let out .= s:bang('git submodule update --init --recursive 2>&1', spec.dir)
      endif
      let msg = s:format_message(v:shell_error ? 'x': '-', name, out)
      if v:shell_error
        call add(s:update.errors, name)
        call s:regress_bar()
        silent execute pos 'd _'
        call append(4, msg) | 4
      elseif !empty(out)
        call setline(pos, msg[0])
      endif
      redraw
    endfor
    silent 4 d _
    try
      call s:do(s:update.pull, s:update.force, filter(copy(s:update.all), 'index(s:update.errors, v:key) < 0 && has_key(v:val, "do")'))
    catch
      call s:warn('echom', v:exception)
      call s:warn('echo', '')
      return
    endtry
    call s:finish(s:update.pull)
    call setline(1, 'Updated. Elapsed time: ' . split(reltimestr(reltime(s:update.start)))[0] . ' sec.')
    call s:switch_out('normal! gg')
  endif
endfunction

function! s:job_abort()
  if (!s:nvim && !s:vim8) || !exists('s:jobs')
    return
  endif

  for [name, j] in items(s:jobs)
    if s:nvim
      silent! call jobstop(j.jobid)
    elseif s:vim8
      silent! call job_stop(j.jobid)
    endif
    if j.new
      call s:system('rm -rf ' . s:shellesc(g:plugs[name].dir))
    endif
  endfor
  let s:jobs = {}
endfunction

function! s:last_non_empty_line(lines)
  let len = len(a:lines)
  for idx in range(len)
    let line = a:lines[len-idx-1]
    if !empty(line)
      return line
    endif
  endfor
  return ''
endfunction

function! s:job_out_cb(self, data) abort
  let self = a:self
  let data = remove(self.lines, -1) . a:data
  let lines = map(split(data, "\n", 1), 'split(v:val, "\r", 1)[-1]')
  call extend(self.lines, lines)
  " To reduce the number of buffer updates
  let self.tick = get(self, 'tick', -1) + 1
  if !self.running || self.tick % len(s:jobs) == 0
    let bullet = self.running ? (self.new ? '+' : '*') : (self.error ? 'x' : '-')
    let result = self.error ? join(self.lines, "\n") : s:last_non_empty_line(self.lines)
    call s:log(bullet, self.name, result)
  endif
endfunction

function! s:job_exit_cb(self, data) abort
  let a:self.running = 0
  let a:self.error = a:data != 0
  call s:reap(a:self.name)
  call s:tick()
endfunction

function! s:job_cb(fn, job, ch, data)
  if !s:plug_window_exists() " plug window closed
    return s:job_abort()
  endif
  call call(a:fn, [a:job, a:data])
endfunction

function! s:nvim_cb(job_id, data, event) dict abort
  return a:event == 'stdout' ?
    \ s:job_cb('s:job_out_cb',  self, 0, join(a:data, "\n")) :
    \ s:job_cb('s:job_exit_cb', self, 0, a:data)
endfunction

function! s:spawn(name, cmd, opts)
  let job = { 'name': a:name, 'running': 1, 'error': 0, 'lines': [''],
            \ 'batchfile': (s:is_win && (s:nvim || s:vim8)) ? tempname().'.bat' : '',
            \ 'new': get(a:opts, 'new', 0) }
  let s:jobs[a:name] = job
  let cmd = has_key(a:opts, 'dir') ? s:with_cd(a:cmd, a:opts.dir) : a:cmd
  if !empty(job.batchfile)
    call writefile(['@echo off', cmd], job.batchfile)
    let cmd = job.batchfile
  endif
  let argv = add(s:is_win ? ['cmd', '/c'] : ['sh', '-c'], cmd)

  if s:nvim
    call extend(job, {
    \ 'on_stdout': function('s:nvim_cb'),
    \ 'on_exit':   function('s:nvim_cb'),
    \ })
    let jid = jobstart(argv, job)
    if jid > 0
      let job.jobid = jid
    else
      let job.running = 0
      let job.error   = 1
      let job.lines   = [jid < 0 ? argv[0].' is not executable' :
            \ 'Invalid arguments (or job table is full)']
    endif
  elseif s:vim8
    let jid = job_start(s:is_win ? join(argv, ' ') : argv, {
    \ 'out_cb':   function('s:job_cb', ['s:job_out_cb',  job]),
    \ 'exit_cb':  function('s:job_cb', ['s:job_exit_cb', job]),
    \ 'out_mode': 'raw'
    \})
    if job_status(jid) == 'run'
      let job.jobid = jid
    else
      let job.running = 0
      let job.error   = 1
      let job.lines   = ['Failed to start job']
    endif
  else
    let job.lines = s:lines(call('s:system', [cmd]))
    let job.error = v:shell_error != 0
    let job.running = 0
  endif
endfunction

function! s:reap(name)
  let job = s:jobs[a:name]
  if job.error
    call add(s:update.errors, a:name)
  elseif get(job, 'new', 0)
    let s:update.new[a:name] = 1
  endif
  let s:update.bar .= job.error ? 'x' : '='

  let bullet = job.error ? 'x' : '-'
  let result = job.error ? join(job.lines, "\n") : s:last_non_empty_line(job.lines)
  call s:log(bullet, a:name, empty(result) ? 'OK' : result)
  call s:bar()

  if has_key(job, 'batchfile') && !empty(job.batchfile)
    call delete(job.batchfile)
  endif
  call remove(s:jobs, a:name)
endfunction

function! s:bar()
  if s:switch_in()
    let total = len(s:update.all)
    call setline(1, (s:update.pull ? 'Updating' : 'Installing').
          \ ' plugins ('.len(s:update.bar).'/'.total.')')
    call s:progress_bar(2, s:update.bar, total)
    call s:switch_out()
  endif
endfunction

function! s:logpos(name)
  for i in range(4, line('$'))
    if getline(i) =~# '^[-+x*] '.a:name.':'
      for j in range(i + 1, line('$'))
        if getline(j) !~ '^ '
          return [i, j - 1]
        endif
      endfor
      return [i, i]
    endif
  endfor
  return [0, 0]
endfunction

function! s:log(bullet, name, lines)
  if s:switch_in()
    let [b, e] = s:logpos(a:name)
    if b > 0
      silent execute printf('%d,%d d _', b, e)
      if b > winheight('.')
        let b = 4
      endif
    else
      let b = 4
    endif
    " FIXME For some reason, nomodifiable is set after :d in vim8
    setlocal modifiable
    call append(b - 1, s:format_message(a:bullet, a:name, a:lines))
    call s:switch_out()
  endif
endfunction

function! s:update_vim()
  let s:jobs = {}

  call s:bar()
  call s:tick()
endfunction

function! s:tick()
  let pull = s:update.pull
  let prog = s:progress_opt(s:nvim || s:vim8)
while 1 " Without TCO, Vim stack is bound to explode
  if empty(s:update.todo)
    if empty(s:jobs) && !s:update.fin
      call s:update_finish()
      let s:update.fin = 1
    endif
    return
  endif

  let name = keys(s:update.todo)[0]
  let spec = remove(s:update.todo, name)
  let new  = !isdirectory(spec.dir)

  call s:log(new ? '+' : '*', name, pull ? 'Updating ...' : 'Installing ...')
  redraw

  let has_tag = has_key(spec, 'tag')
  if !new
    let [error, _] = s:git_validate(spec, 0)
    if empty(error)
      if pull
        let fetch_opt = (has_tag && !empty(globpath(spec.dir, '.git/shallow'))) ? '--depth 99999999' : ''
        call s:spawn(name, printf('git fetch %s %s 2>&1', fetch_opt, prog), { 'dir': spec.dir })
      else
        let s:jobs[name] = { 'running': 0, 'lines': ['Already installed'], 'error': 0 }
      endif
    else
      let s:jobs[name] = { 'running': 0, 'lines': s:lines(error), 'error': 1 }
    endif
  else
    call s:spawn(name,
          \ printf('git clone %s %s %s %s 2>&1',
          \ has_tag ? '' : s:clone_opt,
          \ prog,
          \ s:shellesc(spec.uri),
          \ s:shellesc(s:trim(spec.dir))), { 'new': 1 })
  endif

  if !s:jobs[name].running
    call s:reap(name)
  endif
  if len(s:jobs) >= s:update.threads
    break
  endif
endwhile
endfunction

function! s:update_python()
let py_exe = has('python') ? 'python' : 'python3'
execute py_exe "<< EOF"
import datetime
import functools
import os
try:
  import queue
except ImportError:
  import Queue as queue
import random
import re
import shutil
import signal
import subprocess
import tempfile
import threading as thr
import time
import traceback
import vim

G_NVIM = vim.eval("has('nvim')") == '1'
G_PULL = vim.eval('s:update.pull') == '1'
G_RETRIES = int(vim.eval('get(g:, "plug_retries", 2)')) + 1
G_TIMEOUT = int(vim.eval('get(g:, "plug_timeout", 60)'))
G_CLONE_OPT = vim.eval('s:clone_opt')
G_PROGRESS = vim.eval('s:progress_opt(1)')
G_LOG_PROB = 1.0 / int(vim.eval('s:update.threads'))
G_STOP = thr.Event()
G_IS_WIN = vim.eval('s:is_win') == '1'

class PlugError(Exception):
  def __init__(self, msg):
    self.msg = msg
class CmdTimedOut(PlugError):
  pass
class CmdFailed(PlugError):
  pass
class InvalidURI(PlugError):
  pass
class Action(object):
  INSTALL, UPDATE, ERROR, DONE = ['+', '*', 'x', '-']

class Buffer(object):
  def __init__(self, lock, num_plugs, is_pull):
    self.bar = ''
    self.event = 'Updating' if is_pull else 'Installing'
    self.lock = lock
    self.maxy = int(vim.eval('winheight(".")'))
    self.num_plugs = num_plugs

  def __where(self, name):
    """ Find first line with name in current buffer. Return line num. """
    found, lnum = False, 0
    matcher = re.compile('^[-+x*] {0}:'.format(name))
    for line in vim.current.buffer:
      if matcher.search(line) is not None:
        found = True
        break
      lnum += 1

    if not found:
      lnum = -1
    return lnum

  def header(self):
    curbuf = vim.current.buffer
    curbuf[0] = self.event + ' plugins ({0}/{1})'.format(len(self.bar), self.num_plugs)

    num_spaces = self.num_plugs - len(self.bar)
    curbuf[1] = '[{0}{1}]'.format(self.bar, num_spaces * ' ')

    with self.lock:
      vim.command('normal! 2G')
      vim.command('redraw')

  def write(self, action, name, lines):
    first, rest = lines[0], lines[1:]
    msg = ['{0} {1}{2}{3}'.format(action, name, ': ' if first else '', first)]
    msg.extend(['    ' + line for line in rest])

    try:
      if action == Action.ERROR:
        self.bar += 'x'
        vim.command("call add(s:update.errors, '{0}')".format(name))
      elif action == Action.DONE:
        self.bar += '='

      curbuf = vim.current.buffer
      lnum = self.__where(name)
      if lnum != -1: # Found matching line num
        del curbuf[lnum]
        if lnum > self.maxy and action in set([Action.INSTALL, Action.UPDATE]):
          lnum = 3
      else:
        lnum = 3
      curbuf.append(msg, lnum)

      self.header()
    except vim.error:
      pass

class Command(object):
  CD = 'cd /d' if G_IS_WIN else 'cd'

  def __init__(self, cmd, cmd_dir=None, timeout=60, cb=None, clean=None):
    self.cmd = cmd
    if cmd_dir:
      self.cmd = '{0} {1} && {2}'.format(Command.CD, cmd_dir, self.cmd)
    self.timeout = timeout
    self.callback = cb if cb else (lambda msg: None)
    self.clean = clean if clean else (lambda: None)
    self.proc = None

  @property
  def alive(self):
    """ Returns true only if command still running. """
    return self.proc and self.proc.poll() is None

  def execute(self, ntries=3):
    """ Execute the command with ntries if CmdTimedOut.
        Returns the output of the command if no Exception.
    """
    attempt, finished, limit = 0, False, self.timeout

    while not finished:
      try:
        attempt += 1
        result = self.try_command()
        finished = True
        return result
      except CmdTimedOut:
        if attempt != ntries:
          self.notify_retry()
          self.timeout += limit
        else:
          raise

  def notify_retry(self):
    """ Retry required for command, notify user. """
    for count in range(3, 0, -1):
      if G_STOP.is_set():
        raise KeyboardInterrupt
      msg = 'Timeout. Will retry in {0} second{1} ...'.format(
            count, 's' if count != 1 else '')
      self.callback([msg])
      time.sleep(1)
    self.callback(['Retrying ...'])

  def try_command(self):
    """ Execute a cmd & poll for callback. Returns list of output.
        Raises CmdFailed   -> return code for Popen isn't 0
        Raises CmdTimedOut -> command exceeded timeout without new output
    """
    first_line = True

    try:
      tfile = tempfile.NamedTemporaryFile(mode='w+b')
      preexec_fn = not G_IS_WIN and os.setsid or None
      self.proc = subprocess.Popen(self.cmd, stdout=tfile,
                                   stderr=subprocess.STDOUT,
                                   stdin=subprocess.PIPE, shell=True,
                                   preexec_fn=preexec_fn)
      thrd = thr.Thread(target=(lambda proc: proc.wait()), args=(self.proc,))
      thrd.start()

      thread_not_started = True
      while thread_not_started:
        try:
          thrd.join(0.1)
          thread_not_started = False
        except RuntimeError:
          pass

      while self.alive:
        if G_STOP.is_set():
          raise KeyboardInterrupt

        if first_line or random.random() < G_LOG_PROB:
          first_line = False
          line = '' if G_IS_WIN else nonblock_read(tfile.name)
          if line:
            self.callback([line])

        time_diff = time.time() - os.path.getmtime(tfile.name)
        if time_diff > self.timeout:
          raise CmdTimedOut(['Timeout!'])

        thrd.join(0.5)

      tfile.seek(0)
      result = [line.decode('utf-8', 'replace').rstrip() for line in tfile]

      if self.proc.returncode != 0:
        raise CmdFailed([''] + result)

      return result
    except:
      self.terminate()
      raise

  def terminate(self):
    """ Terminate process and cleanup. """
    if self.alive:
      if G_IS_WIN:
        os.kill(self.proc.pid, signal.SIGINT)
      else:
        os.killpg(self.proc.pid, signal.SIGTERM)
    self.clean()

class Plugin(object):
  def __init__(self, name, args, buf_q, lock):
    self.name = name
    self.args = args
    self.buf_q = buf_q
    self.lock = lock
    self.tag = args.get('tag', 0)

  def manage(self):
    try:
      if os.path.exists(self.args['dir']):
        self.update()
      else:
        self.install()
        with self.lock:
          thread_vim_command("let s:update.new['{0}'] = 1".format(self.name))
    except PlugError as exc:
      self.write(Action.ERROR, self.name, exc.msg)
    except KeyboardInterrupt:
      G_STOP.set()
      self.write(Action.ERROR, self.name, ['Interrupted!'])
    except:
      # Any exception except those above print stack trace
      msg = 'Trace:\n{0}'.format(traceback.format_exc().rstrip())
      self.write(Action.ERROR, self.name, msg.split('\n'))
      raise

  def install(self):
    target = self.args['dir']
    if target[-1] == '\\':
      target = target[0:-1]

    def clean(target):
      def _clean():
        try:
          shutil.rmtree(target)
        except OSError:
          pass
      return _clean

    self.write(Action.INSTALL, self.name, ['Installing ...'])
    callback = functools.partial(self.write, Action.INSTALL, self.name)
    cmd = 'git clone {0} {1} {2} {3} 2>&1'.format(
          '' if self.tag else G_CLONE_OPT, G_PROGRESS, self.args['uri'],
          esc(target))
    com = Command(cmd, None, G_TIMEOUT, callback, clean(target))
    result = com.execute(G_RETRIES)
    self.write(Action.DONE, self.name, result[-1:])

  def repo_uri(self):
    cmd = 'git rev-parse --abbrev-ref HEAD 2>&1 && git config -f .git/config remote.origin.url'
    command = Command(cmd, self.args['dir'], G_TIMEOUT,)
    result = command.execute(G_RETRIES)
    return result[-1]

  def update(self):
    actual_uri = self.repo_uri()
    expect_uri = self.args['uri']
    regex = re.compile(r'^(?:\w+://)?(?:[^@/]*@)?([^:/]*(?::[0-9]*)?)[:/](.*?)(?:\.git)?/?$')
    ma = regex.match(actual_uri)
    mb = regex.match(expect_uri)
    if ma is None or mb is None or ma.groups() != mb.groups():
      msg = ['',
             'Invalid URI: {0}'.format(actual_uri),
             'Expected     {0}'.format(expect_uri),
             'PlugClean required.']
      raise InvalidURI(msg)

    if G_PULL:
      self.write(Action.UPDATE, self.name, ['Updating ...'])
      callback = functools.partial(self.write, Action.UPDATE, self.name)
      fetch_opt = '--depth 99999999' if self.tag and os.path.isfile(os.path.join(self.args['dir'], '.git/shallow')) else ''
      cmd = 'git fetch {0} {1} 2>&1'.format(fetch_opt, G_PROGRESS)
      com = Command(cmd, self.args['dir'], G_TIMEOUT, callback)
      result = com.execute(G_RETRIES)
      self.write(Action.DONE, self.name, result[-1:])
    else:
      self.write(Action.DONE, self.name, ['Already installed'])

  def write(self, action, name, msg):
    self.buf_q.put((action, name, msg))

class PlugThread(thr.Thread):
  def __init__(self, tname, args):
    super(PlugThread, self).__init__()
    self.tname = tname
    self.args = args

  def run(self):
    thr.current_thread().name = self.tname
    buf_q, work_q, lock = self.args

    try:
      while not G_STOP.is_set():
        name, args = work_q.get_nowait()
        plug = Plugin(name, args, buf_q, lock)
        plug.manage()
        work_q.task_done()
    except queue.Empty:
      pass

class RefreshThread(thr.Thread):
  def __init__(self, lock):
    super(RefreshThread, self).__init__()
    self.lock = lock
    self.running = True

  def run(self):
    while self.running:
      with self.lock:
        thread_vim_command('noautocmd normal! a')
      time.sleep(0.33)

  def stop(self):
    self.running = False

if G_NVIM:
  def thread_vim_command(cmd):
    vim.session.threadsafe_call(lambda: vim.command(cmd))
else:
  def thread_vim_command(cmd):
    vim.command(cmd)

def esc(name):
  return '"' + name.replace('"', '\"') + '"'

def nonblock_read(fname):
  """ Read a file with nonblock flag. Return the last line. """
  fread = os.open(fname, os.O_RDONLY | os.O_NONBLOCK)
  buf = os.read(fread, 100000).decode('utf-8', 'replace')
  os.close(fread)

  line = buf.rstrip('\r\n')
  left = max(line.rfind('\r'), line.rfind('\n'))
  if left != -1:
    left += 1
    line = line[left:]

  return line

def main():
  thr.current_thread().name = 'main'
  nthreads = int(vim.eval('s:update.threads'))
  plugs = vim.eval('s:update.todo')
  mac_gui = vim.eval('s:mac_gui') == '1'

  lock = thr.Lock()
  buf = Buffer(lock, len(plugs), G_PULL)
  buf_q, work_q = queue.Queue(), queue.Queue()
  for work in plugs.items():
    work_q.put(work)

  start_cnt = thr.active_count()
  for num in range(nthreads):
    tname = 'PlugT-{0:02}'.format(num)
    thread = PlugThread(tname, (buf_q, work_q, lock))
    thread.start()
  if mac_gui:
    rthread = RefreshThread(lock)
    rthread.start()

  while not buf_q.empty() or thr.active_count() != start_cnt:
    try:
      action, name, msg = buf_q.get(True, 0.25)
      buf.write(action, name, ['OK'] if not msg else msg)
      buf_q.task_done()
    except queue.Empty:
      pass
    except KeyboardInterrupt:
      G_STOP.set()

  if mac_gui:
    rthread.stop()
    rthread.join()

main()
EOF
endfunction

function! s:update_ruby()
  ruby << EOF
  module PlugStream
    SEP = ["\r", "\n", nil]
    def get_line
      buffer = ''
      loop do
        char = readchar rescue return
        if SEP.include? char.chr
          buffer << $/
          break
        else
          buffer << char
        end
      end
      buffer
    end
  end unless defined?(PlugStream)

  def esc arg
    %["#{arg.gsub('"', '\"')}"]
  end

  def killall pid
    pids = [pid]
    if /mswin|mingw|bccwin/ =~ RUBY_PLATFORM
      pids.each { |pid| Process.kill 'INT', pid.to_i rescue nil }
    else
      unless `which pgrep 2> /dev/null`.empty?
        children = pids
        until children.empty?
          children = children.map { |pid|
            `pgrep -P #{pid}`.lines.map { |l| l.chomp }
          }.flatten
          pids += children
        end
      end
      pids.each { |pid| Process.kill 'TERM', pid.to_i rescue nil }
    end
  end

  def compare_git_uri a, b
    regex = %r{^(?:\w+://)?(?:[^@/]*@)?([^:/]*(?::[0-9]*)?)[:/](.*?)(?:\.git)?/?$}
    regex.match(a).to_a.drop(1) == regex.match(b).to_a.drop(1)
  end

  require 'thread'
  require 'fileutils'
  require 'timeout'
  running = true
  iswin = VIM::evaluate('s:is_win').to_i == 1
  pull  = VIM::evaluate('s:update.pull').to_i == 1
  base  = VIM::evaluate('g:plug_home')
  all   = VIM::evaluate('s:update.todo')
  limit = VIM::evaluate('get(g:, "plug_timeout", 60)')
  tries = VIM::evaluate('get(g:, "plug_retries", 2)') + 1
  nthr  = VIM::evaluate('s:update.threads').to_i
  maxy  = VIM::evaluate('winheight(".")').to_i
  vim7  = VIM::evaluate('v:version').to_i <= 703 && RUBY_PLATFORM =~ /darwin/
  cd    = iswin ? 'cd /d' : 'cd'
  tot   = VIM::evaluate('len(s:update.todo)') || 0
  bar   = ''
  skip  = 'Already installed'
  mtx   = Mutex.new
  take1 = proc { mtx.synchronize { running && all.shift } }
  logh  = proc {
    cnt = bar.length
    $curbuf[1] = "#{pull ? 'Updating' : 'Installing'} plugins (#{cnt}/#{tot})"
    $curbuf[2] = '[' + bar.ljust(tot) + ']'
    VIM::command('normal! 2G')
    VIM::command('redraw')
  }
  where = proc { |name| (1..($curbuf.length)).find { |l| $curbuf[l] =~ /^[-+x*] #{name}:/ } }
  log   = proc { |name, result, type|
    mtx.synchronize do
      ing  = ![true, false].include?(type)
      bar += type ? '=' : 'x' unless ing
      b = case type
          when :install  then '+' when :update then '*'
          when true, nil then '-' else
            VIM::command("call add(s:update.errors, '#{name}')")
            'x'
          end
      result =
        if type || type.nil?
          ["#{b} #{name}: #{result.lines.to_a.last || 'OK'}"]
        elsif result =~ /^Interrupted|^Timeout/
          ["#{b} #{name}: #{result}"]
        else
          ["#{b} #{name}"] + result.lines.map { |l| "    " << l }
        end
      if lnum = where.call(name)
        $curbuf.delete lnum
        lnum = 4 if ing && lnum > maxy
      end
      result.each_with_index do |line, offset|
        $curbuf.append((lnum || 4) - 1 + offset, line.gsub(/\e\[./, '').chomp)
      end
      logh.call
    end
  }
  bt = proc { |cmd, name, type, cleanup|
    tried = timeout = 0
    begin
      tried += 1
      timeout += limit
      fd = nil
      data = ''
      if iswin
        Timeout::timeout(timeout) do
          tmp = VIM::evaluate('tempname()')
          system("(#{cmd}) > #{tmp}")
          data = File.read(tmp).chomp
          File.unlink tmp rescue nil
        end
      else
        fd = IO.popen(cmd).extend(PlugStream)
        first_line = true
        log_prob = 1.0 / nthr
        while line = Timeout::timeout(timeout) { fd.get_line }
          data << line
          log.call name, line.chomp, type if name && (first_line || rand < log_prob)
          first_line = false
        end
        fd.close
      end
      [$? == 0, data.chomp]
    rescue Timeout::Error, Interrupt => e
      if fd && !fd.closed?
        killall fd.pid
        fd.close
      end
      cleanup.call if cleanup
      if e.is_a?(Timeout::Error) && tried < tries
        3.downto(1) do |countdown|
          s = countdown > 1 ? 's' : ''
          log.call name, "Timeout. Will retry in #{countdown} second#{s} ...", type
          sleep 1
        end
        log.call name, 'Retrying ...', type
        retry
      end
      [false, e.is_a?(Interrupt) ? "Interrupted!" : "Timeout!"]
    end
  }
  main = Thread.current
  threads = []
  watcher = Thread.new {
    if vim7
      while VIM::evaluate('getchar(1)')
        sleep 0.1
      end
    else
      require 'io/console' # >= Ruby 1.9
      nil until IO.console.getch == 3.chr
    end
    mtx.synchronize do
      running = false
      threads.each { |t| t.raise Interrupt } unless vim7
    end
    threads.each { |t| t.join rescue nil }
    main.kill
  }
  refresh = Thread.new {
    while true
      mtx.synchronize do
        break unless running
        VIM::command('noautocmd normal! a')
      end
      sleep 0.2
    end
  } if VIM::evaluate('s:mac_gui') == 1

  clone_opt = VIM::evaluate('s:clone_opt')
  progress = VIM::evaluate('s:progress_opt(1)')
  nthr.times do
    mtx.synchronize do
      threads << Thread.new {
        while pair = take1.call
          name = pair.first
          dir, uri, tag = pair.last.values_at *%w[dir uri tag]
          exists = File.directory? dir
          ok, result =
            if exists
              chdir = "#{cd} #{iswin ? dir : esc(dir)}"
              ret, data = bt.call "#{chdir} && git rev-parse --abbrev-ref HEAD 2>&1 && git config -f .git/config remote.origin.url", nil, nil, nil
              current_uri = data.lines.to_a.last
              if !ret
                if data =~ /^Interrupted|^Timeout/
                  [false, data]
                else
                  [false, [data.chomp, "PlugClean required."].join($/)]
                end
              elsif !compare_git_uri(current_uri, uri)
                [false, ["Invalid URI: #{current_uri}",
                         "Expected:    #{uri}",
                         "PlugClean required."].join($/)]
              else
                if pull
                  log.call name, 'Updating ...', :update
                  fetch_opt = (tag && File.exist?(File.join(dir, '.git/shallow'))) ? '--depth 99999999' : ''
                  bt.call "#{chdir} && git fetch #{fetch_opt} #{progress} 2>&1", name, :update, nil
                else
                  [true, skip]
                end
              end
            else
              d = esc dir.sub(%r{[\\/]+$}, '')
              log.call name, 'Installing ...', :install
              bt.call "git clone #{clone_opt unless tag} #{progress} #{uri} #{d} 2>&1", name, :install, proc {
                FileUtils.rm_rf dir
              }
            end
          mtx.synchronize { VIM::command("let s:update.new['#{name}'] = 1") } if !exists && ok
          log.call name, result, ok
        end
      } if running
    end
  end
  threads.each { |t| t.join rescue nil }
  logh.call
  refresh.kill if refresh
  watcher.kill
EOF
endfunction

function! s:shellesc_cmd(arg)
  let escaped = substitute(a:arg, '[&|<>()@^]', '^&', 'g')
  let escaped = substitute(escaped, '%', '%%', 'g')
  let escaped = substitute(escaped, '"', '\\^&', 'g')
  let escaped = substitute(escaped, '\(\\\+\)\(\\^\)', '\1\1\2', 'g')
  return '^"'.substitute(escaped, '\(\\\+\)$', '\1\1', '').'^"'
endfunction

function! s:shellesc(arg)
  if &shell =~# 'cmd.exe$'
    return s:shellesc_cmd(a:arg)
  endif
  return shellescape(a:arg)
endfunction

function! s:glob_dir(path)
  return map(filter(s:glob(a:path, '**'), 'isdirectory(v:val)'), 's:dirpath(v:val)')
endfunction

function! s:progress_bar(line, bar, total)
  call setline(a:line, '[' . s:lpad(a:bar, a:total) . ']')
endfunction

function! s:compare_git_uri(a, b)
  " See `git help clone'
  " https:// [user@] github.com[:port] / junegunn/vim-plug [.git]
  "          [git@]  github.com[:port] : junegunn/vim-plug [.git]
  " file://                            / junegunn/vim-plug        [/]
  "                                    / junegunn/vim-plug        [/]
  let pat = '^\%(\w\+://\)\='.'\%([^@/]*@\)\='.'\([^:/]*\%(:[0-9]*\)\=\)'.'[:/]'.'\(.\{-}\)'.'\%(\.git\)\=/\?$'
  let ma = matchlist(a:a, pat)
  let mb = matchlist(a:b, pat)
  return ma[1:2] ==# mb[1:2]
endfunction

function! s:format_message(bullet, name, message)
  if a:bullet != 'x'
    return [printf('%s %s: %s', a:bullet, a:name, s:lastline(a:message))]
  else
    let lines = map(s:lines(a:message), '"    ".v:val')
    return extend([printf('x %s:', a:name)], lines)
  endif
endfunction

function! s:with_cd(cmd, dir)
  return printf('cd%s %s && %s', s:is_win ? ' /d' : '', s:shellesc(a:dir), a:cmd)
endfunction

function! s:system(cmd, ...)
  try
    let [sh, shellcmdflag, shrd] = s:chsh(1)
    let cmd = a:0 > 0 ? s:with_cd(a:cmd, a:1) : a:cmd
    if s:is_win
      let batchfile = tempname().'.bat'
      call writefile(['@echo off', cmd], batchfile)
      let cmd = batchfile
    endif
    return system(s:is_win ? '('.cmd.')' : cmd)
  finally
    let [&shell, &shellcmdflag, &shellredir] = [sh, shellcmdflag, shrd]
    if s:is_win
      call delete(batchfile)
    endif
  endtry
endfunction

function! s:system_chomp(...)
  let ret = call('s:system', a:000)
  return v:shell_error ? '' : substitute(ret, '\n$', '', '')
endfunction

function! s:git_validate(spec, check_branch)
  let err = ''
  if isdirectory(a:spec.dir)
    let result = s:lines(s:system('git rev-parse --abbrev-ref HEAD 2>&1 && git config -f .git/config remote.origin.url', a:spec.dir))
    let remote = result[-1]
    if v:shell_error
      let err = join([remote, 'PlugClean required.'], "\n")
    elseif !s:compare_git_uri(remote, a:spec.uri)
      let err = join(['Invalid URI: '.remote,
                    \ 'Expected:    '.a:spec.uri,
                    \ 'PlugClean required.'], "\n")
    elseif a:check_branch && has_key(a:spec, 'commit')
      let result = s:lines(s:system('git rev-parse HEAD 2>&1', a:spec.dir))
      let sha = result[-1]
      if v:shell_error
        let err = join(add(result, 'PlugClean required.'), "\n")
      elseif !s:hash_match(sha, a:spec.commit)
        let err = join([printf('Invalid HEAD (expected: %s, actual: %s)',
                              \ a:spec.commit[:6], sha[:6]),
                      \ 'PlugUpdate required.'], "\n")
      endif
    elseif a:check_branch
      let branch = result[0]
      " Check tag
      if has_key(a:spec, 'tag')
        let tag = s:system_chomp('git describe --exact-match --tags HEAD 2>&1', a:spec.dir)
        if a:spec.tag !=# tag && a:spec.tag !~ '\*'
          let err = printf('Invalid tag: %s (expected: %s). Try PlugUpdate.',
                \ (empty(tag) ? 'N/A' : tag), a:spec.tag)
        endif
      " Check branch
      elseif a:spec.branch !=# branch
        let err = printf('Invalid branch: %s (expected: %s). Try PlugUpdate.',
              \ branch, a:spec.branch)
      endif
      if empty(err)
        let [ahead, behind] = split(s:lastline(s:system(printf(
              \ 'git rev-list --count --left-right HEAD...origin/%s',
              \ a:spec.branch), a:spec.dir)), '\t')
        if !v:shell_error && ahead
          if behind
            " Only mention PlugClean if diverged, otherwise it's likely to be
            " pushable (and probably not that messed up).
            let err = printf(
                  \ "Diverged from origin/%s (%d commit(s) ahead and %d commit(s) behind!\n"
                  \ .'Backup local changes and run PlugClean and PlugUpdate to reinstall it.', a:spec.branch, ahead, behind)
          else
            let err = printf("Ahead of origin/%s by %d commit(s).\n"
                  \ .'Cannot update until local changes are pushed.',
                  \ a:spec.branch, ahead)
          endif
        endif
      endif
    endif
  else
    let err = 'Not found'
  endif
  return [err, err =~# 'PlugClean']
endfunction

function! s:rm_rf(dir)
  if isdirectory(a:dir)
    call s:system((s:is_win ? 'rmdir /S /Q ' : 'rm -rf ') . s:shellesc(a:dir))
  endif
endfunction

function! s:clean(force)
  call s:prepare()
  call append(0, 'Searching for invalid plugins in '.g:plug_home)
  call append(1, '')

  " List of valid directories
  let dirs = []
  let errs = {}
  let [cnt, total] = [0, len(g:plugs)]
  for [name, spec] in items(g:plugs)
    if !s:is_managed(name)
      call add(dirs, spec.dir)
    else
      let [err, clean] = s:git_validate(spec, 1)
      if clean
        let errs[spec.dir] = s:lines(err)[0]
      else
        call add(dirs, spec.dir)
      endif
    endif
    let cnt += 1
    call s:progress_bar(2, repeat('=', cnt), total)
    normal! 2G
    redraw
  endfor

  let allowed = {}
  for dir in dirs
    let allowed[s:dirpath(fnamemodify(dir, ':h:h'))] = 1
    let allowed[dir] = 1
    for child in s:glob_dir(dir)
      let allowed[child] = 1
    endfor
  endfor

  let todo = []
  let found = sort(s:glob_dir(g:plug_home))
  while !empty(found)
    let f = remove(found, 0)
    if !has_key(allowed, f) && isdirectory(f)
      call add(todo, f)
      call append(line('$'), '- ' . f)
      if has_key(errs, f)
        call append(line('$'), '    ' . errs[f])
      endif
      let found = filter(found, 'stridx(v:val, f) != 0')
    end
  endwhile

  4
  redraw
  if empty(todo)
    call append(line('$'), 'Already clean.')
  else
    let s:clean_count = 0
    call append(3, ['Directories to delete:', ''])
    redraw!
    if a:force || s:ask_no_interrupt('Delete all directories?')
      call s:delete([6, line('$')], 1)
    else
      call setline(4, 'Cancelled.')
      nnoremap <silent> <buffer> d :set opfunc=<sid>delete_op<cr>g@
      nmap     <silent> <buffer> dd d_
      xnoremap <silent> <buffer> d :<c-u>call <sid>delete_op(visualmode(), 1)<cr>
      echo 'Delete the lines (d{motion}) to delete the corresponding directories'
    endif
  endif
  4
  setlocal nomodifiable
endfunction

function! s:delete_op(type, ...)
  call s:delete(a:0 ? [line("'<"), line("'>")] : [line("'["), line("']")], 0)
endfunction

function! s:delete(range, force)
  let [l1, l2] = a:range
  let force = a:force
  while l1 <= l2
    let line = getline(l1)
    if line =~ '^- ' && isdirectory(line[2:])
      execute l1
      redraw!
      let answer = force ? 1 : s:ask('Delete '.line[2:].'?', 1)
      let force = force || answer > 1
      if answer
        call s:rm_rf(line[2:])
        setlocal modifiable
        call setline(l1, '~'.line[1:])
        let s:clean_count += 1
        call setline(4, printf('Removed %d directories.', s:clean_count))
        setlocal nomodifiable
      endif
    endif
    let l1 += 1
  endwhile
endfunction

function! s:upgrade()
  echo 'Downloading the latest version of vim-plug'
  redraw
  let tmp = tempname()
  let new = tmp . '/plug.vim'

  try
    let out = s:system(printf('git clone --depth 1 %s %s', s:plug_src, tmp))
    if v:shell_error
      return s:err('Error upgrading vim-plug: '. out)
    endif

    if readfile(s:me) ==# readfile(new)
      echo 'vim-plug is already up-to-date'
      return 0
    else
      call rename(s:me, s:me . '.old')
      call rename(new, s:me)
      unlet g:loaded_plug
      echo 'vim-plug has been upgraded'
      return 1
    endif
  finally
    silent! call s:rm_rf(tmp)
  endtry
endfunction

function! s:upgrade_specs()
  for spec in values(g:plugs)
    let spec.frozen = get(spec, 'frozen', 0)
  endfor
endfunction

function! s:status()
  call s:prepare()
  call append(0, 'Checking plugins')
  call append(1, '')

  let ecnt = 0
  let unloaded = 0
  let [cnt, total] = [0, len(g:plugs)]
  for [name, spec] in items(g:plugs)
    let is_dir = isdirectory(spec.dir)
    if has_key(spec, 'uri')
      if is_dir
        let [err, _] = s:git_validate(spec, 1)
        let [valid, msg] = [empty(err), empty(err) ? 'OK' : err]
      else
        let [valid, msg] = [0, 'Not found. Try PlugInstall.']
      endif
    else
      if is_dir
        let [valid, msg] = [1, 'OK']
      else
        let [valid, msg] = [0, 'Not found.']
      endif
    endif
    let cnt += 1
    let ecnt += !valid
    " `s:loaded` entry can be missing if PlugUpgraded
    if is_dir && get(s:loaded, name, -1) == 0
      let unloaded = 1
      let msg .= ' (not loaded)'
    endif
    call s:progress_bar(2, repeat('=', cnt), total)
    call append(3, s:format_message(valid ? '-' : 'x', name, msg))
    normal! 2G
    redraw
  endfor
  call setline(1, 'Finished. '.ecnt.' error(s).')
  normal! gg
  setlocal nomodifiable
  if unloaded
    echo "Press 'L' on each line to load plugin, or 'U' to update"
    nnoremap <silent> <buffer> L :call <SID>status_load(line('.'))<cr>
    xnoremap <silent> <buffer> L :call <SID>status_load(line('.'))<cr>
  end
endfunction

function! s:extract_name(str, prefix, suffix)
  return matchstr(a:str, '^'.a:prefix.' \zs[^:]\+\ze:.*'.a:suffix.'$')
endfunction

function! s:status_load(lnum)
  let line = getline(a:lnum)
  let name = s:extract_name(line, '-', '(not loaded)')
  if !empty(name)
    call plug#load(name)
    setlocal modifiable
    call setline(a:lnum, substitute(line, ' (not loaded)$', '', ''))
    setlocal nomodifiable
  endif
endfunction

function! s:status_update() range
  let lines = getline(a:firstline, a:lastline)
  let names = filter(map(lines, 's:extract_name(v:val, "[x-]", "")'), '!empty(v:val)')
  if !empty(names)
    echo
    execute 'PlugUpdate' join(names)
  endif
endfunction

function! s:is_preview_window_open()
  silent! wincmd P
  if &previewwindow
    wincmd p
    return 1
  endif
endfunction

function! s:find_name(lnum)
  for lnum in reverse(range(1, a:lnum))
    let line = getline(lnum)
    if empty(line)
      return ''
    endif
    let name = s:extract_name(line, '-', '')
    if !empty(name)
      return name
    endif
  endfor
  return ''
endfunction

function! s:preview_commit()
  if b:plug_preview < 0
    let b:plug_preview = !s:is_preview_window_open()
  endif

  let sha = matchstr(getline('.'), '^  \X*\zs[0-9a-f]\{7,9}')
  if empty(sha)
    return
  endif

  let name = s:find_name(line('.'))
  if empty(name) || !has_key(g:plugs, name) || !isdirectory(g:plugs[name].dir)
    return
  endif

  if exists('g:plug_pwindow') && !s:is_preview_window_open()
    execute g:plug_pwindow
    execute 'e' sha
  else
    execute 'pedit' sha
    wincmd P
  endif
  setlocal previewwindow filetype=git buftype=nofile nobuflisted modifiable
  try
    let [sh, shellcmdflag, shrd] = s:chsh(1)
    let cmd = 'cd '.s:shellesc(g:plugs[name].dir).' && git show --no-color --pretty=medium '.sha
    if s:is_win
      let batchfile = tempname().'.bat'
      call writefile(['@echo off', cmd], batchfile)
      let cmd = batchfile
    endif
    execute 'silent %!' cmd
  finally
    let [&shell, &shellcmdflag, &shellredir] = [sh, shellcmdflag, shrd]
    if s:is_win
      call delete(batchfile)
    endif
  endtry
  setlocal nomodifiable
  nnoremap <silent> <buffer> q :q<cr>
  wincmd p
endfunction

function! s:section(flags)
  call search('\(^[x-] \)\@<=[^:]\+:', a:flags)
endfunction

function! s:format_git_log(line)
  let indent = '  '
  let tokens = split(a:line, nr2char(1))
  if len(tokens) != 5
    return indent.substitute(a:line, '\s*$', '', '')
  endif
  let [graph, sha, refs, subject, date] = tokens
  let tag = matchstr(refs, 'tag: [^,)]\+')
  let tag = empty(tag) ? ' ' : ' ('.tag.') '
  return printf('%s%s%s%s%s (%s)', indent, graph, sha, tag, subject, date)
endfunction

function! s:append_ul(lnum, text)
  call append(a:lnum, ['', a:text, repeat('-', len(a:text))])
endfunction

function! s:diff()
  call s:prepare()
  call append(0, ['Collecting changes ...', ''])
  let cnts = [0, 0]
  let bar = ''
  let total = filter(copy(g:plugs), 's:is_managed(v:key) && isdirectory(v:val.dir)')
  call s:progress_bar(2, bar, len(total))
  for origin in [1, 0]
    let plugs = reverse(sort(items(filter(copy(total), (origin ? '' : '!').'(has_key(v:val, "commit") || has_key(v:val, "tag"))'))))
    if empty(plugs)
      continue
    endif
    call s:append_ul(2, origin ? 'Pending updates:' : 'Last update:')
    for [k, v] in plugs
      let range = origin ? '..origin/'.v.branch : 'HEAD@{1}..'
      let diff = s:system_chomp('git log --graph --color=never '.join(map(['--pretty=format:%x01%h%x01%d%x01%s%x01%cr', range], 's:shellesc(v:val)')), v.dir)
      if !empty(diff)
        let ref = has_key(v, 'tag') ? (' (tag: '.v.tag.')') : has_key(v, 'commit') ? (' '.v.commit) : ''
        call append(5, extend(['', '- '.k.':'.ref], map(s:lines(diff), 's:format_git_log(v:val)')))
        let cnts[origin] += 1
      endif
      let bar .= '='
      call s:progress_bar(2, bar, len(total))
      normal! 2G
      redraw
    endfor
    if !cnts[origin]
      call append(5, ['', 'N/A'])
    endif
  endfor
  call setline(1, printf('%d plugin(s) updated.', cnts[0])
        \ . (cnts[1] ? printf(' %d plugin(s) have pending updates.', cnts[1]) : ''))

  if cnts[0] || cnts[1]
    nnoremap <silent> <buffer> <cr> :silent! call <SID>preview_commit()<cr>
    nnoremap <silent> <buffer> o    :silent! call <SID>preview_commit()<cr>
  endif
  if cnts[0]
    nnoremap <silent> <buffer> X :call <SID>revert()<cr>
    echo "Press 'X' on each block to revert the update"
  endif
  normal! gg
  setlocal nomodifiable
endfunction

function! s:revert()
  if search('^Pending updates', 'bnW')
    return
  endif

  let name = s:find_name(line('.'))
  if empty(name) || !has_key(g:plugs, name) ||
    \ input(printf('Revert the update of %s? (y/N) ', name)) !~? '^y'
    return
  endif

  call s:system('git reset --hard HEAD@{1} && git checkout '.s:esc(g:plugs[name].branch).' --', g:plugs[name].dir)
  setlocal modifiable
  normal! "_dap
  setlocal nomodifiable
  echo 'Reverted'
endfunction

function! s:snapshot(force, ...) abort
  call s:prepare()
  setf vim
  call append(0, ['" Generated by vim-plug',
                \ '" '.strftime("%c"),
                \ '" :source this file in vim to restore the snapshot',
                \ '" or execute: vim -S snapshot.vim',
                \ '', '', 'PlugUpdate!'])
  1
  let anchor = line('$') - 3
  let names = sort(keys(filter(copy(g:plugs),
        \'has_key(v:val, "uri") && !has_key(v:val, "commit") && isdirectory(v:val.dir)')))
  for name in reverse(names)
    let sha = s:system_chomp('git rev-parse --short HEAD', g:plugs[name].dir)
    if !empty(sha)
      call append(anchor, printf("silent! let g:plugs['%s'].commit = '%s'", name, sha))
      redraw
    endif
  endfor

  if a:0 > 0
    let fn = expand(a:1)
    if filereadable(fn) && !(a:force || s:ask(a:1.' already exists. Overwrite?'))
      return
    endif
    call writefile(getline(1, '$'), fn)
    echo 'Saved as '.a:1
    silent execute 'e' s:esc(fn)
    setf vim
  endif
endfunction

function! s:split_rtp()
  return split(&rtp, '\\\@<!,')
endfunction

let s:first_rtp = s:escrtp(get(s:split_rtp(), 0, ''))
let s:last_rtp  = s:escrtp(get(s:split_rtp(), -1, ''))

if exists('g:plugs')
  let g:plugs_order = get(g:, 'plugs_order', keys(g:plugs))
  call s:upgrade_specs()
  call s:define_commands()
endif

let &cpo = s:cpo_save
unlet s:cpo_save