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Commit | Line | Data |
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1b1dce4b JS |
1 | #!/bin/sh |
2 | # | |
3 | # Copyright (c) 2006 Johannes E. Schindelin | |
4 | ||
5 | # SHORT DESCRIPTION | |
6 | # | |
7 | # This script makes it easy to fix up commits in the middle of a series, | |
8 | # and rearrange commits. | |
9 | # | |
10 | # The original idea comes from Eric W. Biederman, in | |
11 | # http://article.gmane.org/gmane.comp.version-control.git/22407 | |
12 | ||
f09c9b8c JS |
13 | USAGE='(--continue | --abort | --skip | [--preserve-merges] [--verbose] |
14 | [--onto <branch>] <upstream> [<branch>])' | |
1b1dce4b JS |
15 | |
16 | . git-sh-setup | |
17 | require_work_tree | |
18 | ||
19 | DOTEST="$GIT_DIR/.dotest-merge" | |
c22486c9 | 20 | TODO="$DOTEST"/git-rebase-todo |
1b1dce4b | 21 | DONE="$DOTEST"/done |
6368f3f8 JS |
22 | MSG="$DOTEST"/message |
23 | SQUASH_MSG="$DOTEST"/message-squash | |
f09c9b8c JS |
24 | REWRITTEN="$DOTEST"/rewritten |
25 | PRESERVE_MERGES= | |
1b1dce4b JS |
26 | STRATEGY= |
27 | VERBOSE= | |
8e4a91bd JS |
28 | test -d "$REWRITTEN" && PRESERVE_MERGES=t |
29 | test -f "$DOTEST"/strategy && STRATEGY="$(cat "$DOTEST"/strategy)" | |
30 | test -f "$DOTEST"/verbose && VERBOSE=t | |
1b1dce4b JS |
31 | |
32 | warn () { | |
33 | echo "$*" >&2 | |
34 | } | |
35 | ||
dfa49f33 JS |
36 | output () { |
37 | case "$VERBOSE" in | |
38 | '') | |
39 | "$@" > "$DOTEST"/output 2>&1 | |
40 | status=$? | |
41 | test $status != 0 && | |
42 | cat "$DOTEST"/output | |
43 | return $status | |
44 | ;; | |
45 | *) | |
46 | "$@" | |
47 | esac | |
48 | } | |
49 | ||
1b1dce4b JS |
50 | require_clean_work_tree () { |
51 | # test if working tree is dirty | |
52 | git rev-parse --verify HEAD > /dev/null && | |
53 | git update-index --refresh && | |
54 | git diff-files --quiet && | |
55 | git diff-index --cached --quiet HEAD || | |
56 | die "Working tree is dirty" | |
57 | } | |
58 | ||
59 | ORIG_REFLOG_ACTION="$GIT_REFLOG_ACTION" | |
60 | ||
61 | comment_for_reflog () { | |
62 | case "$ORIG_REFLOG_ACTION" in | |
63 | ''|rebase*) | |
64 | GIT_REFLOG_ACTION="rebase -i ($1)" | |
65 | export GIT_REFLOG_ACTION | |
66 | esac | |
67 | } | |
68 | ||
69 | mark_action_done () { | |
70 | sed -e 1q < "$TODO" >> "$DONE" | |
71 | sed -e 1d < "$TODO" >> "$TODO".new | |
72 | mv -f "$TODO".new "$TODO" | |
dfa49f33 JS |
73 | count=$(($(wc -l < "$DONE"))) |
74 | total=$(($count+$(wc -l < "$TODO"))) | |
75 | printf "Rebasing (%d/%d)\r" $count $total | |
76 | test -z "$VERBOSE" || echo | |
1b1dce4b JS |
77 | } |
78 | ||
79 | make_patch () { | |
80 | parent_sha1=$(git rev-parse --verify "$1"^ 2> /dev/null) | |
81 | git diff "$parent_sha1".."$1" > "$DOTEST"/patch | |
82 | } | |
83 | ||
84 | die_with_patch () { | |
18640d99 JS |
85 | test -f "$DOTEST"/message || |
86 | git cat-file commit $sha1 | sed "1,/^$/d" > "$DOTEST"/message | |
87 | test -f "$DOTEST"/author-script || | |
88 | get_author_ident_from_commit $sha1 > "$DOTEST"/author-script | |
1b1dce4b JS |
89 | make_patch "$1" |
90 | die "$2" | |
91 | } | |
92 | ||
c54b7817 JS |
93 | die_abort () { |
94 | rm -rf "$DOTEST" | |
95 | die "$1" | |
96 | } | |
97 | ||
1b1dce4b | 98 | pick_one () { |
1d25c8cf JS |
99 | no_ff= |
100 | case "$1" in -n) sha1=$2; no_ff=t ;; *) sha1=$1 ;; esac | |
dfa49f33 | 101 | output git rev-parse --verify $sha1 || die "Invalid commit name: $sha1" |
f09c9b8c JS |
102 | test -d "$REWRITTEN" && |
103 | pick_one_preserving_merges "$@" && return | |
1b1dce4b JS |
104 | parent_sha1=$(git rev-parse --verify $sha1^ 2>/dev/null) |
105 | current_sha1=$(git rev-parse --verify HEAD) | |
1d25c8cf | 106 | if test $no_ff$current_sha1 = $parent_sha1; then |
dfa49f33 JS |
107 | output git reset --hard $sha1 |
108 | test "a$1" = a-n && output git reset --soft $current_sha1 | |
1b1dce4b | 109 | sha1=$(git rev-parse --short $sha1) |
dfa49f33 | 110 | output warn Fast forward to $sha1 |
1b1dce4b | 111 | else |
dfa49f33 | 112 | output git cherry-pick $STRATEGY "$@" |
1b1dce4b JS |
113 | fi |
114 | } | |
115 | ||
f09c9b8c JS |
116 | pick_one_preserving_merges () { |
117 | case "$1" in -n) sha1=$2 ;; *) sha1=$1 ;; esac | |
118 | sha1=$(git rev-parse $sha1) | |
119 | ||
3b38ec16 | 120 | if test -f "$DOTEST"/current-commit |
f09c9b8c JS |
121 | then |
122 | current_commit=$(cat "$DOTEST"/current-commit) && | |
123 | git rev-parse HEAD > "$REWRITTEN"/$current_commit && | |
124 | rm "$DOTEST"/current-commit || | |
125 | die "Cannot write current commit's replacement sha1" | |
126 | fi | |
127 | ||
128 | # rewrite parents; if none were rewritten, we can fast-forward. | |
129 | fast_forward=t | |
130 | preserve=t | |
131 | new_parents= | |
132 | for p in $(git rev-list --parents -1 $sha1 | cut -d\ -f2-) | |
133 | do | |
3b38ec16 | 134 | if test -f "$REWRITTEN"/$p |
f09c9b8c JS |
135 | then |
136 | preserve=f | |
137 | new_p=$(cat "$REWRITTEN"/$p) | |
138 | test $p != $new_p && fast_forward=f | |
139 | case "$new_parents" in | |
140 | *$new_p*) | |
141 | ;; # do nothing; that parent is already there | |
142 | *) | |
143 | new_parents="$new_parents $new_p" | |
144 | esac | |
145 | fi | |
146 | done | |
147 | case $fast_forward in | |
148 | t) | |
dfa49f33 | 149 | output warn "Fast forward to $sha1" |
f09c9b8c JS |
150 | test $preserve=f && echo $sha1 > "$REWRITTEN"/$sha1 |
151 | ;; | |
152 | f) | |
153 | test "a$1" = a-n && die "Refusing to squash a merge: $sha1" | |
154 | ||
155 | first_parent=$(expr "$new_parents" : " \([^ ]*\)") | |
156 | # detach HEAD to current parent | |
dfa49f33 | 157 | output git checkout $first_parent 2> /dev/null || |
f09c9b8c JS |
158 | die "Cannot move HEAD to $first_parent" |
159 | ||
160 | echo $sha1 > "$DOTEST"/current-commit | |
161 | case "$new_parents" in | |
162 | \ *\ *) | |
163 | # redo merge | |
164 | author_script=$(get_author_ident_from_commit $sha1) | |
165 | eval "$author_script" | |
166 | msg="$(git cat-file commit $sha1 | \ | |
167 | sed -e '1,/^$/d' -e "s/[\"\\]/\\\\&/g")" | |
168 | # NEEDSWORK: give rerere a chance | |
dfa49f33 | 169 | if ! output git merge $STRATEGY -m "$msg" $new_parents |
f09c9b8c JS |
170 | then |
171 | echo "$msg" > "$GIT_DIR"/MERGE_MSG | |
18640d99 | 172 | die Error redoing merge $sha1 |
f09c9b8c JS |
173 | fi |
174 | ;; | |
175 | *) | |
dfa49f33 | 176 | output git cherry-pick $STRATEGY "$@" || |
f09c9b8c JS |
177 | die_with_patch $sha1 "Could not pick $sha1" |
178 | esac | |
179 | esac | |
180 | } | |
181 | ||
6368f3f8 JS |
182 | nth_string () { |
183 | case "$1" in | |
184 | *1[0-9]|*[04-9]) echo "$1"th;; | |
185 | *1) echo "$1"st;; | |
186 | *2) echo "$1"nd;; | |
187 | *3) echo "$1"rd;; | |
188 | esac | |
189 | } | |
190 | ||
191 | make_squash_message () { | |
3b38ec16 | 192 | if test -f "$SQUASH_MSG"; then |
c7965afd | 193 | COUNT=$(($(sed -n "s/^# This is [^0-9]*\([1-9][0-9]*\).*/\1/p" \ |
6368f3f8 JS |
194 | < "$SQUASH_MSG" | tail -n 1)+1)) |
195 | echo "# This is a combination of $COUNT commits." | |
196 | sed -n "2,\$p" < "$SQUASH_MSG" | |
197 | else | |
198 | COUNT=2 | |
199 | echo "# This is a combination of two commits." | |
200 | echo "# The first commit's message is:" | |
201 | echo | |
202 | git cat-file commit HEAD | sed -e '1,/^$/d' | |
203 | echo | |
204 | fi | |
205 | echo "# This is the $(nth_string $COUNT) commit message:" | |
206 | echo | |
207 | git cat-file commit $1 | sed -e '1,/^$/d' | |
208 | } | |
209 | ||
210 | peek_next_command () { | |
211 | sed -n "1s/ .*$//p" < "$TODO" | |
212 | } | |
213 | ||
1b1dce4b | 214 | do_next () { |
18640d99 JS |
215 | test -f "$DOTEST"/message && rm "$DOTEST"/message |
216 | test -f "$DOTEST"/author-script && rm "$DOTEST"/author-script | |
1b1dce4b JS |
217 | read command sha1 rest < "$TODO" |
218 | case "$command" in | |
219 | \#|'') | |
220 | mark_action_done | |
1b1dce4b JS |
221 | ;; |
222 | pick) | |
223 | comment_for_reflog pick | |
224 | ||
225 | mark_action_done | |
226 | pick_one $sha1 || | |
227 | die_with_patch $sha1 "Could not apply $sha1... $rest" | |
228 | ;; | |
229 | edit) | |
230 | comment_for_reflog edit | |
231 | ||
232 | mark_action_done | |
233 | pick_one $sha1 || | |
234 | die_with_patch $sha1 "Could not apply $sha1... $rest" | |
235 | make_patch $sha1 | |
236 | warn | |
237 | warn "You can amend the commit now, with" | |
238 | warn | |
239 | warn " git commit --amend" | |
240 | warn | |
241 | exit 0 | |
242 | ;; | |
243 | squash) | |
244 | comment_for_reflog squash | |
245 | ||
246 | test -z "$(grep -ve '^$' -e '^#' < $DONE)" && | |
247 | die "Cannot 'squash' without a previous commit" | |
248 | ||
249 | mark_action_done | |
6368f3f8 JS |
250 | make_squash_message $sha1 > "$MSG" |
251 | case "$(peek_next_command)" in | |
252 | squash) | |
253 | EDIT_COMMIT= | |
91e1ee77 | 254 | USE_OUTPUT=output |
6368f3f8 JS |
255 | cp "$MSG" "$SQUASH_MSG" |
256 | ;; | |
257 | *) | |
258 | EDIT_COMMIT=-e | |
91e1ee77 | 259 | USE_OUTPUT= |
6368f3f8 JS |
260 | test -f "$SQUASH_MSG" && rm "$SQUASH_MSG" |
261 | esac | |
262 | ||
793ad041 | 263 | failed=f |
81ab1cb4 | 264 | author_script=$(get_author_ident_from_commit HEAD) |
dfa49f33 | 265 | output git reset --soft HEAD^ |
fb47cfbd | 266 | pick_one -n $sha1 || failed=t |
18640d99 | 267 | echo "$author_script" > "$DOTEST"/author-script |
1b1dce4b JS |
268 | case $failed in |
269 | f) | |
270 | # This is like --amend, but with a different message | |
271 | eval "$author_script" | |
272 | export GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL GIT_AUTHOR_DATE | |
91e1ee77 | 273 | $USE_OUTPUT git commit -F "$MSG" $EDIT_COMMIT |
1b1dce4b JS |
274 | ;; |
275 | t) | |
276 | cp "$MSG" "$GIT_DIR"/MERGE_MSG | |
277 | warn | |
278 | warn "Could not apply $sha1... $rest" | |
1b1dce4b JS |
279 | die_with_patch $sha1 "" |
280 | esac | |
281 | ;; | |
282 | *) | |
283 | warn "Unknown command: $command $sha1 $rest" | |
284 | die_with_patch $sha1 "Please fix this in the file $TODO." | |
285 | esac | |
286 | test -s "$TODO" && return | |
287 | ||
68a163c9 JS |
288 | comment_for_reflog finish && |
289 | HEADNAME=$(cat "$DOTEST"/head-name) && | |
290 | OLDHEAD=$(cat "$DOTEST"/head) && | |
291 | SHORTONTO=$(git rev-parse --short $(cat "$DOTEST"/onto)) && | |
3b38ec16 | 292 | if test -d "$REWRITTEN" |
f09c9b8c JS |
293 | then |
294 | test -f "$DOTEST"/current-commit && | |
295 | current_commit=$(cat "$DOTEST"/current-commit) && | |
296 | git rev-parse HEAD > "$REWRITTEN"/$current_commit | |
297 | NEWHEAD=$(cat "$REWRITTEN"/$OLDHEAD) | |
298 | else | |
299 | NEWHEAD=$(git rev-parse HEAD) | |
300 | fi && | |
68a163c9 JS |
301 | message="$GIT_REFLOG_ACTION: $HEADNAME onto $SHORTONTO)" && |
302 | git update-ref -m "$message" $HEADNAME $NEWHEAD $OLDHEAD && | |
3df0a859 JS |
303 | git symbolic-ref HEAD $HEADNAME && { |
304 | test ! -f "$DOTEST"/verbose || | |
305 | git diff --stat $(cat "$DOTEST"/head)..HEAD | |
306 | } && | |
1b1dce4b JS |
307 | rm -rf "$DOTEST" && |
308 | warn "Successfully rebased and updated $HEADNAME." | |
309 | ||
310 | exit | |
311 | } | |
312 | ||
313 | do_rest () { | |
314 | while : | |
315 | do | |
316 | do_next | |
317 | done | |
1b1dce4b JS |
318 | } |
319 | ||
822f7c73 | 320 | while test $# != 0 |
1b1dce4b JS |
321 | do |
322 | case "$1" in | |
323 | --continue) | |
324 | comment_for_reflog continue | |
325 | ||
326 | test -d "$DOTEST" || die "No interactive rebase running" | |
327 | ||
18640d99 JS |
328 | # commit if necessary |
329 | git rev-parse --verify HEAD > /dev/null && | |
330 | git update-index --refresh && | |
331 | git diff-files --quiet && | |
332 | ! git diff-index --cached --quiet HEAD && | |
333 | . "$DOTEST"/author-script && | |
334 | export GIT_AUTHOR_NAME GIT_AUTHOR_NAME GIT_AUTHOR_DATE && | |
335 | git commit -F "$DOTEST"/message -e | |
336 | ||
1b1dce4b JS |
337 | require_clean_work_tree |
338 | do_rest | |
339 | ;; | |
340 | --abort) | |
341 | comment_for_reflog abort | |
342 | ||
343 | test -d "$DOTEST" || die "No interactive rebase running" | |
344 | ||
345 | HEADNAME=$(cat "$DOTEST"/head-name) | |
346 | HEAD=$(cat "$DOTEST"/head) | |
347 | git symbolic-ref HEAD $HEADNAME && | |
dfa49f33 | 348 | output git reset --hard $HEAD && |
1b1dce4b JS |
349 | rm -rf "$DOTEST" |
350 | exit | |
351 | ;; | |
352 | --skip) | |
353 | comment_for_reflog skip | |
354 | ||
355 | test -d "$DOTEST" || die "No interactive rebase running" | |
356 | ||
dfa49f33 | 357 | output git reset --hard && do_rest |
1b1dce4b JS |
358 | ;; |
359 | -s|--strategy) | |
360 | shift | |
361 | case "$#,$1" in | |
362 | *,*=*) | |
363 | STRATEGY="-s `expr "z$1" : 'z-[^=]*=\(.*\)'`" ;; | |
364 | 1,*) | |
365 | usage ;; | |
366 | *) | |
367 | STRATEGY="-s $2" | |
368 | shift ;; | |
369 | esac | |
370 | ;; | |
371 | --merge) | |
372 | # we use merge anyway | |
373 | ;; | |
374 | -C*) | |
375 | die "Interactive rebase uses merge, so $1 does not make sense" | |
376 | ;; | |
c54b7817 | 377 | -v|--verbose) |
1b1dce4b JS |
378 | VERBOSE=t |
379 | ;; | |
f09c9b8c JS |
380 | -p|--preserve-merges) |
381 | PRESERVE_MERGES=t | |
382 | ;; | |
1b1dce4b JS |
383 | -i|--interactive) |
384 | # yeah, we know | |
385 | ;; | |
386 | ''|-h) | |
387 | usage | |
388 | ;; | |
389 | *) | |
390 | test -d "$DOTEST" && | |
391 | die "Interactive rebase already started" | |
392 | ||
393 | git var GIT_COMMITTER_IDENT >/dev/null || | |
394 | die "You need to set your committer info first" | |
395 | ||
396 | comment_for_reflog start | |
397 | ||
398 | ONTO= | |
399 | case "$1" in | |
400 | --onto) | |
401 | ONTO=$(git rev-parse --verify "$2") || | |
402 | die "Does not point to a valid commit: $2" | |
403 | shift; shift | |
404 | ;; | |
405 | esac | |
406 | ||
407 | require_clean_work_tree | |
408 | ||
c9e65892 | 409 | mkdir "$DOTEST" || die "Could not create temporary $DOTEST" |
3b38ec16 | 410 | if test ! -z "$2" |
1b1dce4b | 411 | then |
dfa49f33 | 412 | output git show-ref --verify --quiet "refs/heads/$2" || |
1b1dce4b | 413 | die "Invalid branchname: $2" |
dfa49f33 | 414 | output git checkout "$2" || |
1b1dce4b JS |
415 | die "Could not checkout $2" |
416 | fi | |
417 | ||
418 | HEAD=$(git rev-parse --verify HEAD) || die "No HEAD?" | |
419 | UPSTREAM=$(git rev-parse --verify "$1") || die "Invalid base" | |
420 | ||
421 | test -z "$ONTO" && ONTO=$UPSTREAM | |
422 | ||
1b1dce4b JS |
423 | : > "$DOTEST"/interactive || die "Could not mark as interactive" |
424 | git symbolic-ref HEAD > "$DOTEST"/head-name || | |
425 | die "Could not get HEAD" | |
426 | ||
427 | echo $HEAD > "$DOTEST"/head | |
428 | echo $UPSTREAM > "$DOTEST"/upstream | |
429 | echo $ONTO > "$DOTEST"/onto | |
8e4a91bd | 430 | test -z "$STRATEGY" || echo "$STRATEGY" > "$DOTEST"/strategy |
1b1dce4b | 431 | test t = "$VERBOSE" && : > "$DOTEST"/verbose |
3b38ec16 | 432 | if test t = "$PRESERVE_MERGES" |
f09c9b8c JS |
433 | then |
434 | # $REWRITTEN contains files for each commit that is | |
435 | # reachable by at least one merge base of $HEAD and | |
436 | # $UPSTREAM. They are not necessarily rewritten, but | |
437 | # their children might be. | |
438 | # This ensures that commits on merged, but otherwise | |
439 | # unrelated side branches are left alone. (Think "X" | |
440 | # in the man page's example.) | |
441 | mkdir "$REWRITTEN" && | |
442 | for c in $(git merge-base --all $HEAD $UPSTREAM) | |
443 | do | |
444 | echo $ONTO > "$REWRITTEN"/$c || | |
445 | die "Could not init rewritten commits" | |
446 | done | |
447 | MERGES_OPTION= | |
448 | else | |
449 | MERGES_OPTION=--no-merges | |
450 | fi | |
1b1dce4b | 451 | |
c54b7817 JS |
452 | SHORTUPSTREAM=$(git rev-parse --short $UPSTREAM) |
453 | SHORTHEAD=$(git rev-parse --short $HEAD) | |
454 | SHORTONTO=$(git rev-parse --short $ONTO) | |
1b1dce4b | 455 | cat > "$TODO" << EOF |
c54b7817 | 456 | # Rebasing $SHORTUPSTREAM..$SHORTHEAD onto $SHORTONTO |
1b1dce4b JS |
457 | # |
458 | # Commands: | |
459 | # pick = use commit | |
460 | # edit = use commit, but stop for amending | |
461 | # squash = use commit, but meld into previous commit | |
82576ddb JS |
462 | # |
463 | # If you remove a line here THAT COMMIT WILL BE LOST. | |
464 | # | |
1b1dce4b | 465 | EOF |
f09c9b8c | 466 | git rev-list $MERGES_OPTION --pretty=oneline --abbrev-commit \ |
96ffe892 JS |
467 | --abbrev=7 --reverse --left-right --cherry-pick \ |
468 | $UPSTREAM...$HEAD | \ | |
469 | sed -n "s/^>/pick /p" >> "$TODO" | |
1b1dce4b JS |
470 | |
471 | test -z "$(grep -ve '^$' -e '^#' < $TODO)" && | |
c54b7817 | 472 | die_abort "Nothing to do" |
1b1dce4b JS |
473 | |
474 | cp "$TODO" "$TODO".backup | |
ef0c2abf | 475 | git_editor "$TODO" || |
1b1dce4b JS |
476 | die "Could not execute editor" |
477 | ||
c54b7817 JS |
478 | test -z "$(grep -ve '^$' -e '^#' < $TODO)" && |
479 | die_abort "Nothing to do" | |
480 | ||
dfa49f33 | 481 | output git checkout $ONTO && do_rest |
1b1dce4b JS |
482 | esac |
483 | shift | |
484 | done |