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1 | #!/bin/sh | |
2 | # | |
3 | # This program resolves merge conflicts in git | |
4 | # | |
5 | # Copyright (c) 2006 Theodore Y. Ts'o | |
6 | # Copyright (c) 2009-2016 David Aguilar | |
7 | # | |
8 | # This file is licensed under the GPL v2, or a later version | |
9 | # at the discretion of Junio C Hamano. | |
10 | # | |
11 | ||
12 | USAGE='[--tool=tool] [--tool-help] [-y|--no-prompt|--prompt] [-g|--gui|--no-gui] [-O<orderfile>] [file to merge] ...' | |
13 | SUBDIRECTORY_OK=Yes | |
14 | NONGIT_OK=Yes | |
15 | OPTIONS_SPEC= | |
16 | TOOL_MODE=merge | |
17 | . git-sh-setup | |
18 | . git-mergetool--lib | |
19 | ||
20 | # Returns true if the mode reflects a symlink | |
21 | is_symlink () { | |
22 | test "$1" = 120000 | |
23 | } | |
24 | ||
25 | is_submodule () { | |
26 | test "$1" = 160000 | |
27 | } | |
28 | ||
29 | local_present () { | |
30 | test -n "$local_mode" | |
31 | } | |
32 | ||
33 | remote_present () { | |
34 | test -n "$remote_mode" | |
35 | } | |
36 | ||
37 | base_present () { | |
38 | test -n "$base_mode" | |
39 | } | |
40 | ||
41 | mergetool_tmpdir_init () { | |
42 | if test "$(git config --bool mergetool.writeToTemp)" != true | |
43 | then | |
44 | MERGETOOL_TMPDIR=. | |
45 | return 0 | |
46 | fi | |
47 | if MERGETOOL_TMPDIR=$(mktemp -d -t "git-mergetool-XXXXXX" 2>/dev/null) | |
48 | then | |
49 | return 0 | |
50 | fi | |
51 | die "error: mktemp is needed when 'mergetool.writeToTemp' is true" | |
52 | } | |
53 | ||
54 | cleanup_temp_files () { | |
55 | if test "$1" = --save-backup | |
56 | then | |
57 | rm -rf -- "$MERGED.orig" | |
58 | test -e "$BACKUP" && mv -- "$BACKUP" "$MERGED.orig" | |
59 | rm -f -- "$LOCAL" "$REMOTE" "$BASE" | |
60 | else | |
61 | rm -f -- "$LOCAL" "$REMOTE" "$BASE" "$BACKUP" | |
62 | fi | |
63 | if test "$MERGETOOL_TMPDIR" != "." | |
64 | then | |
65 | rmdir "$MERGETOOL_TMPDIR" | |
66 | fi | |
67 | } | |
68 | ||
69 | describe_file () { | |
70 | mode="$1" | |
71 | branch="$2" | |
72 | file="$3" | |
73 | ||
74 | printf " {%s}: " "$branch" | |
75 | if test -z "$mode" | |
76 | then | |
77 | echo "deleted" | |
78 | elif is_symlink "$mode" | |
79 | then | |
80 | echo "a symbolic link -> '$(cat "$file")'" | |
81 | elif is_submodule "$mode" | |
82 | then | |
83 | echo "submodule commit $file" | |
84 | elif base_present | |
85 | then | |
86 | echo "modified file" | |
87 | else | |
88 | echo "created file" | |
89 | fi | |
90 | } | |
91 | ||
92 | resolve_symlink_merge () { | |
93 | while true | |
94 | do | |
95 | printf "Use (l)ocal or (r)emote, or (a)bort? " | |
96 | read ans || return 1 | |
97 | case "$ans" in | |
98 | [lL]*) | |
99 | git checkout-index -f --stage=2 -- "$MERGED" | |
100 | git add -- "$MERGED" | |
101 | cleanup_temp_files --save-backup | |
102 | return 0 | |
103 | ;; | |
104 | [rR]*) | |
105 | git checkout-index -f --stage=3 -- "$MERGED" | |
106 | git add -- "$MERGED" | |
107 | cleanup_temp_files --save-backup | |
108 | return 0 | |
109 | ;; | |
110 | [aA]*) | |
111 | return 1 | |
112 | ;; | |
113 | esac | |
114 | done | |
115 | } | |
116 | ||
117 | resolve_deleted_merge () { | |
118 | while true | |
119 | do | |
120 | if base_present | |
121 | then | |
122 | printf "Use (m)odified or (d)eleted file, or (a)bort? " | |
123 | else | |
124 | printf "Use (c)reated or (d)eleted file, or (a)bort? " | |
125 | fi | |
126 | read ans || return 1 | |
127 | case "$ans" in | |
128 | [mMcC]*) | |
129 | git add -- "$MERGED" | |
130 | if test "$merge_keep_backup" = "true" | |
131 | then | |
132 | cleanup_temp_files --save-backup | |
133 | else | |
134 | cleanup_temp_files | |
135 | fi | |
136 | return 0 | |
137 | ;; | |
138 | [dD]*) | |
139 | git rm -- "$MERGED" > /dev/null | |
140 | cleanup_temp_files | |
141 | return 0 | |
142 | ;; | |
143 | [aA]*) | |
144 | if test "$merge_keep_temporaries" = "false" | |
145 | then | |
146 | cleanup_temp_files | |
147 | fi | |
148 | return 1 | |
149 | ;; | |
150 | esac | |
151 | done | |
152 | } | |
153 | ||
154 | resolve_submodule_merge () { | |
155 | while true | |
156 | do | |
157 | printf "Use (l)ocal or (r)emote, or (a)bort? " | |
158 | read ans || return 1 | |
159 | case "$ans" in | |
160 | [lL]*) | |
161 | if ! local_present | |
162 | then | |
163 | if test -n "$(git ls-tree HEAD -- "$MERGED")" | |
164 | then | |
165 | # Local isn't present, but it's a subdirectory | |
166 | git ls-tree --full-name -r HEAD -- "$MERGED" | | |
167 | git update-index --index-info || exit $? | |
168 | else | |
169 | test -e "$MERGED" && mv -- "$MERGED" "$BACKUP" | |
170 | git update-index --force-remove "$MERGED" | |
171 | cleanup_temp_files --save-backup | |
172 | fi | |
173 | elif is_submodule "$local_mode" | |
174 | then | |
175 | stage_submodule "$MERGED" "$local_sha1" | |
176 | else | |
177 | git checkout-index -f --stage=2 -- "$MERGED" | |
178 | git add -- "$MERGED" | |
179 | fi | |
180 | return 0 | |
181 | ;; | |
182 | [rR]*) | |
183 | if ! remote_present | |
184 | then | |
185 | if test -n "$(git ls-tree MERGE_HEAD -- "$MERGED")" | |
186 | then | |
187 | # Remote isn't present, but it's a subdirectory | |
188 | git ls-tree --full-name -r MERGE_HEAD -- "$MERGED" | | |
189 | git update-index --index-info || exit $? | |
190 | else | |
191 | test -e "$MERGED" && mv -- "$MERGED" "$BACKUP" | |
192 | git update-index --force-remove "$MERGED" | |
193 | fi | |
194 | elif is_submodule "$remote_mode" | |
195 | then | |
196 | ! is_submodule "$local_mode" && | |
197 | test -e "$MERGED" && | |
198 | mv -- "$MERGED" "$BACKUP" | |
199 | stage_submodule "$MERGED" "$remote_sha1" | |
200 | else | |
201 | test -e "$MERGED" && mv -- "$MERGED" "$BACKUP" | |
202 | git checkout-index -f --stage=3 -- "$MERGED" | |
203 | git add -- "$MERGED" | |
204 | fi | |
205 | cleanup_temp_files --save-backup | |
206 | return 0 | |
207 | ;; | |
208 | [aA]*) | |
209 | return 1 | |
210 | ;; | |
211 | esac | |
212 | done | |
213 | } | |
214 | ||
215 | stage_submodule () { | |
216 | path="$1" | |
217 | submodule_sha1="$2" | |
218 | mkdir -p "$path" || | |
219 | die "fatal: unable to create directory for module at $path" | |
220 | # Find $path relative to work tree | |
221 | work_tree_root=$(cd_to_toplevel && pwd) | |
222 | work_rel_path=$(cd "$path" && | |
223 | GIT_WORK_TREE="${work_tree_root}" git rev-parse --show-prefix | |
224 | ) | |
225 | test -n "$work_rel_path" || | |
226 | die "fatal: unable to get path of module $path relative to work tree" | |
227 | git update-index --add --replace --cacheinfo 160000 "$submodule_sha1" "${work_rel_path%/}" || die | |
228 | } | |
229 | ||
230 | checkout_staged_file () { | |
231 | tmpfile="$(git checkout-index --temp --stage="$1" "$2" 2>/dev/null)" && | |
232 | tmpfile=${tmpfile%%' '*} | |
233 | ||
234 | if test $? -eq 0 && test -n "$tmpfile" | |
235 | then | |
236 | mv -- "$(git rev-parse --show-cdup)$tmpfile" "$3" | |
237 | else | |
238 | >"$3" | |
239 | fi | |
240 | } | |
241 | ||
242 | merge_file () { | |
243 | MERGED="$1" | |
244 | ||
245 | f=$(git ls-files -u -- "$MERGED") | |
246 | if test -z "$f" | |
247 | then | |
248 | if test ! -f "$MERGED" | |
249 | then | |
250 | echo "$MERGED: file not found" | |
251 | else | |
252 | echo "$MERGED: file does not need merging" | |
253 | fi | |
254 | return 1 | |
255 | fi | |
256 | ||
257 | # extract file extension from the last path component | |
258 | case "${MERGED##*/}" in | |
259 | *.*) | |
260 | ext=.${MERGED##*.} | |
261 | BASE=${MERGED%"$ext"} | |
262 | ;; | |
263 | *) | |
264 | BASE=$MERGED | |
265 | ext= | |
266 | esac | |
267 | ||
268 | mergetool_tmpdir_init | |
269 | ||
270 | if test "$MERGETOOL_TMPDIR" != "." | |
271 | then | |
272 | # If we're using a temporary directory then write to the | |
273 | # top-level of that directory. | |
274 | BASE=${BASE##*/} | |
275 | fi | |
276 | ||
277 | BACKUP="$MERGETOOL_TMPDIR/${BASE}_BACKUP_$$$ext" | |
278 | LOCAL="$MERGETOOL_TMPDIR/${BASE}_LOCAL_$$$ext" | |
279 | REMOTE="$MERGETOOL_TMPDIR/${BASE}_REMOTE_$$$ext" | |
280 | BASE="$MERGETOOL_TMPDIR/${BASE}_BASE_$$$ext" | |
281 | ||
282 | base_mode= local_mode= remote_mode= | |
283 | ||
284 | # here, $IFS is just a LF | |
285 | for line in $f | |
286 | do | |
287 | mode=${line%% *} # 1st word | |
288 | sha1=${line#"$mode "} | |
289 | sha1=${sha1%% *} # 2nd word | |
290 | case "${line#$mode $sha1 }" in # remainder | |
291 | '1 '*) | |
292 | base_mode=$mode | |
293 | ;; | |
294 | '2 '*) | |
295 | local_mode=$mode local_sha1=$sha1 | |
296 | ;; | |
297 | '3 '*) | |
298 | remote_mode=$mode remote_sha1=$sha1 | |
299 | ;; | |
300 | esac | |
301 | done | |
302 | ||
303 | if is_submodule "$local_mode" || is_submodule "$remote_mode" | |
304 | then | |
305 | echo "Submodule merge conflict for '$MERGED':" | |
306 | describe_file "$local_mode" "local" "$local_sha1" | |
307 | describe_file "$remote_mode" "remote" "$remote_sha1" | |
308 | resolve_submodule_merge | |
309 | return | |
310 | fi | |
311 | ||
312 | if test -f "$MERGED" | |
313 | then | |
314 | mv -- "$MERGED" "$BACKUP" | |
315 | cp -- "$BACKUP" "$MERGED" | |
316 | fi | |
317 | # Create a parent directory to handle delete/delete conflicts | |
318 | # where the base's directory no longer exists. | |
319 | mkdir -p "$(dirname "$MERGED")" | |
320 | ||
321 | checkout_staged_file 1 "$MERGED" "$BASE" | |
322 | checkout_staged_file 2 "$MERGED" "$LOCAL" | |
323 | checkout_staged_file 3 "$MERGED" "$REMOTE" | |
324 | ||
325 | if test -z "$local_mode" || test -z "$remote_mode" | |
326 | then | |
327 | echo "Deleted merge conflict for '$MERGED':" | |
328 | describe_file "$local_mode" "local" "$LOCAL" | |
329 | describe_file "$remote_mode" "remote" "$REMOTE" | |
330 | resolve_deleted_merge | |
331 | status=$? | |
332 | rmdir -p "$(dirname "$MERGED")" 2>/dev/null | |
333 | return $status | |
334 | fi | |
335 | ||
336 | if is_symlink "$local_mode" || is_symlink "$remote_mode" | |
337 | then | |
338 | echo "Symbolic link merge conflict for '$MERGED':" | |
339 | describe_file "$local_mode" "local" "$LOCAL" | |
340 | describe_file "$remote_mode" "remote" "$REMOTE" | |
341 | resolve_symlink_merge | |
342 | return | |
343 | fi | |
344 | ||
345 | echo "Normal merge conflict for '$MERGED':" | |
346 | describe_file "$local_mode" "local" "$LOCAL" | |
347 | describe_file "$remote_mode" "remote" "$REMOTE" | |
348 | if test "$guessed_merge_tool" = true || test "$prompt" = true | |
349 | then | |
350 | printf "Hit return to start merge resolution tool (%s): " "$merge_tool" | |
351 | read ans || return 1 | |
352 | fi | |
353 | ||
354 | if base_present | |
355 | then | |
356 | present=true | |
357 | else | |
358 | present=false | |
359 | fi | |
360 | ||
361 | if ! run_merge_tool "$merge_tool" "$present" | |
362 | then | |
363 | echo "merge of $MERGED failed" 1>&2 | |
364 | mv -- "$BACKUP" "$MERGED" | |
365 | ||
366 | if test "$merge_keep_temporaries" = "false" | |
367 | then | |
368 | cleanup_temp_files | |
369 | fi | |
370 | ||
371 | return 1 | |
372 | fi | |
373 | ||
374 | if test "$merge_keep_backup" = "true" | |
375 | then | |
376 | mv -- "$BACKUP" "$MERGED.orig" | |
377 | else | |
378 | rm -- "$BACKUP" | |
379 | fi | |
380 | ||
381 | git add -- "$MERGED" | |
382 | cleanup_temp_files | |
383 | return 0 | |
384 | } | |
385 | ||
386 | prompt_after_failed_merge () { | |
387 | while true | |
388 | do | |
389 | printf "Continue merging other unresolved paths [y/n]? " | |
390 | read ans || return 1 | |
391 | case "$ans" in | |
392 | [yY]*) | |
393 | return 0 | |
394 | ;; | |
395 | [nN]*) | |
396 | return 1 | |
397 | ;; | |
398 | esac | |
399 | done | |
400 | } | |
401 | ||
402 | print_noop_and_exit () { | |
403 | echo "No files need merging" | |
404 | exit 0 | |
405 | } | |
406 | ||
407 | main () { | |
408 | prompt=$(git config --bool mergetool.prompt) | |
409 | GIT_MERGETOOL_GUI=false | |
410 | guessed_merge_tool=false | |
411 | orderfile= | |
412 | ||
413 | while test $# != 0 | |
414 | do | |
415 | case "$1" in | |
416 | --tool-help=*) | |
417 | TOOL_MODE=${1#--tool-help=} | |
418 | show_tool_help | |
419 | ;; | |
420 | --tool-help) | |
421 | show_tool_help | |
422 | ;; | |
423 | -t|--tool*) | |
424 | case "$#,$1" in | |
425 | *,*=*) | |
426 | merge_tool=${1#*=} | |
427 | ;; | |
428 | 1,*) | |
429 | usage ;; | |
430 | *) | |
431 | merge_tool="$2" | |
432 | shift ;; | |
433 | esac | |
434 | ;; | |
435 | --no-gui) | |
436 | GIT_MERGETOOL_GUI=false | |
437 | ;; | |
438 | -g|--gui) | |
439 | GIT_MERGETOOL_GUI=true | |
440 | ;; | |
441 | -y|--no-prompt) | |
442 | prompt=false | |
443 | ;; | |
444 | --prompt) | |
445 | prompt=true | |
446 | ;; | |
447 | -O*) | |
448 | orderfile="${1#-O}" | |
449 | ;; | |
450 | --) | |
451 | shift | |
452 | break | |
453 | ;; | |
454 | -*) | |
455 | usage | |
456 | ;; | |
457 | *) | |
458 | break | |
459 | ;; | |
460 | esac | |
461 | shift | |
462 | done | |
463 | ||
464 | git_dir_init | |
465 | require_work_tree | |
466 | ||
467 | if test -z "$merge_tool" | |
468 | then | |
469 | if ! merge_tool=$(get_merge_tool) | |
470 | then | |
471 | guessed_merge_tool=true | |
472 | fi | |
473 | fi | |
474 | merge_keep_backup="$(git config --bool mergetool.keepBackup || echo true)" | |
475 | merge_keep_temporaries="$(git config --bool mergetool.keepTemporaries || echo false)" | |
476 | ||
477 | prefix=$(git rev-parse --show-prefix) || exit 1 | |
478 | cd_to_toplevel | |
479 | ||
480 | if test -n "$orderfile" | |
481 | then | |
482 | orderfile=$( | |
483 | git rev-parse --prefix "$prefix" -- "$orderfile" | | |
484 | sed -e 1d | |
485 | ) | |
486 | fi | |
487 | ||
488 | if test $# -eq 0 && test -e "$GIT_DIR/MERGE_RR" | |
489 | then | |
490 | set -- $(git rerere remaining) | |
491 | if test $# -eq 0 | |
492 | then | |
493 | print_noop_and_exit | |
494 | fi | |
495 | elif test $# -ge 0 | |
496 | then | |
497 | # rev-parse provides the -- needed for 'set' | |
498 | eval "set $(git rev-parse --sq --prefix "$prefix" -- "$@")" | |
499 | fi | |
500 | ||
501 | files=$(git -c core.quotePath=false \ | |
502 | diff --name-only --diff-filter=U \ | |
503 | ${orderfile:+"-O$orderfile"} -- "$@") | |
504 | ||
505 | if test -z "$files" | |
506 | then | |
507 | print_noop_and_exit | |
508 | fi | |
509 | ||
510 | printf "Merging:\n" | |
511 | printf "%s\n" "$files" | |
512 | ||
513 | rc=0 | |
514 | set -- $files | |
515 | while test $# -ne 0 | |
516 | do | |
517 | printf "\n" | |
518 | if ! merge_file "$1" | |
519 | then | |
520 | rc=1 | |
521 | test $# -ne 1 && prompt_after_failed_merge || exit 1 | |
522 | fi | |
523 | shift | |
524 | done | |
525 | ||
526 | exit $rc | |
527 | } | |
528 | ||
529 | main "$@" |