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Commit | Line | Data |
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59e6b23a JH |
1 | #!/bin/sh |
2 | # | |
3 | # Copyright (c) 2005 Junio C Hamano. | |
4 | # | |
5 | ||
1b1dce4b | 6 | USAGE='[--interactive | -i] [-v] [--onto <newbase>] <upstream> [<branch>]' |
031321c6 SE |
7 | LONG_USAGE='git-rebase replaces <branch> with a new branch of the |
8 | same name. When the --onto option is provided the new branch starts | |
9 | out with a HEAD equal to <newbase>, otherwise it is equal to <upstream> | |
10 | It then attempts to create a new commit for each commit from the original | |
11 | <branch> that does not exist in the <upstream> branch. | |
69a60af5 | 12 | |
031321c6 SE |
13 | It is possible that a merge failure will prevent this process from being |
14 | completely automatic. You will have to resolve any such merge failure | |
cc120056 SE |
15 | and run git rebase --continue. Another option is to bypass the commit |
16 | that caused the merge failure with git rebase --skip. To restore the | |
17 | original <branch> and remove the .dotest working files, use the command | |
18 | git rebase --abort instead. | |
69a60af5 | 19 | |
031321c6 SE |
20 | Note that if <branch> is not specified on the command line, the |
21 | currently checked out branch is used. You must be in the top | |
22 | directory of your project to start (or continue) a rebase. | |
e646c9c8 | 23 | |
031321c6 | 24 | Example: git-rebase master~1 topic |
e646c9c8 | 25 | |
031321c6 SE |
26 | A---B---C topic A'\''--B'\''--C'\'' topic |
27 | / --> / | |
28 | D---E---F---G master D---E---F---G master | |
e646c9c8 | 29 | ' |
533b7039 JH |
30 | |
31 | SUBDIRECTORY_OK=Yes | |
8f321a39 | 32 | OPTIONS_SPEC= |
ae2b0f15 | 33 | . git-sh-setup |
f9474132 | 34 | set_reflog_action rebase |
7eff28a9 | 35 | require_work_tree |
533b7039 | 36 | cd_to_toplevel |
4282c4fb | 37 | |
cc120056 SE |
38 | RESOLVEMSG=" |
39 | When you have resolved this problem run \"git rebase --continue\". | |
40 | If you would prefer to skip this patch, instead run \"git rebase --skip\". | |
41 | To restore the original branch and stop rebasing run \"git rebase --abort\". | |
42 | " | |
e646c9c8 | 43 | unset newbase |
a06f678e | 44 | strategy=recursive |
58634dbf EW |
45 | do_merge= |
46 | dotest=$GIT_DIR/.dotest-merge | |
47 | prec=4 | |
b758789c | 48 | verbose= |
67dad687 | 49 | git_am_opt= |
58634dbf EW |
50 | |
51 | continue_merge () { | |
52 | test -n "$prev_head" || die "prev_head must be defined" | |
53 | test -d "$dotest" || die "$dotest directory does not exist" | |
54 | ||
5be60078 | 55 | unmerged=$(git ls-files -u) |
58634dbf EW |
56 | if test -n "$unmerged" |
57 | then | |
58 | echo "You still have unmerged paths in your index" | |
9b07873a | 59 | echo "did you forget to use git add?" |
66eb64cb | 60 | die "$RESOLVEMSG" |
58634dbf EW |
61 | fi |
62 | ||
889a50e9 | 63 | cmt=`cat "$dotest/current"` |
38762c47 | 64 | if ! git diff-index --quiet HEAD -- |
58634dbf | 65 | then |
7afa845e | 66 | if ! git-commit -C "$cmt" |
f0ef0596 EW |
67 | then |
68 | echo "Commit failed, please do not call \"git commit\"" | |
69 | echo "directly, but instead do one of the following: " | |
70 | die "$RESOLVEMSG" | |
71 | fi | |
7afa845e | 72 | printf "Committed: %0${prec}d " $msgnum |
58634dbf | 73 | else |
7afa845e | 74 | printf "Already applied: %0${prec}d " $msgnum |
58634dbf | 75 | fi |
c7965afd | 76 | git rev-list --pretty=oneline -1 "$cmt" | sed -e 's/^[^ ]* //' |
58634dbf | 77 | |
5be60078 | 78 | prev_head=`git rev-parse HEAD^0` |
58634dbf | 79 | # save the resulting commit so we can read-tree on it later |
58634dbf EW |
80 | echo "$prev_head" > "$dotest/prev_head" |
81 | ||
82 | # onto the next patch: | |
83 | msgnum=$(($msgnum + 1)) | |
5887ac82 | 84 | echo "$msgnum" >"$dotest/msgnum" |
58634dbf EW |
85 | } |
86 | ||
87 | call_merge () { | |
889a50e9 | 88 | cmt="$(cat "$dotest/cmt.$1")" |
58634dbf | 89 | echo "$cmt" > "$dotest/current" |
5be60078 | 90 | hd=$(git rev-parse --verify HEAD) |
6fd2f5e6 | 91 | cmt_name=$(git symbolic-ref HEAD 2> /dev/null || echo HEAD) |
889a50e9 JS |
92 | msgnum=$(cat "$dotest/msgnum") |
93 | end=$(cat "$dotest/end") | |
0bb733c9 | 94 | eval GITHEAD_$cmt='"${cmt_name##refs/heads/}~$(($end - $msgnum))"' |
889a50e9 | 95 | eval GITHEAD_$hd='$(cat "$dotest/onto_name")' |
0bb733c9 SP |
96 | export GITHEAD_$cmt GITHEAD_$hd |
97 | git-merge-$strategy "$cmt^" -- "$hd" "$cmt" | |
58634dbf EW |
98 | rv=$? |
99 | case "$rv" in | |
100 | 0) | |
0bb733c9 | 101 | unset GITHEAD_$cmt GITHEAD_$hd |
9e4bc7dd | 102 | return |
58634dbf EW |
103 | ;; |
104 | 1) | |
b4372ef1 | 105 | git rerere |
66eb64cb | 106 | die "$RESOLVEMSG" |
58634dbf EW |
107 | ;; |
108 | 2) | |
109 | echo "Strategy: $rv $strategy failed, try another" 1>&2 | |
66eb64cb | 110 | die "$RESOLVEMSG" |
58634dbf EW |
111 | ;; |
112 | *) | |
113 | die "Unknown exit code ($rv) from command:" \ | |
114 | "git-merge-$strategy $cmt^ -- HEAD $cmt" | |
115 | ;; | |
116 | esac | |
117 | } | |
118 | ||
6fd2f5e6 JS |
119 | move_to_original_branch () { |
120 | test -z "$head_name" && | |
121 | head_name="$(cat "$dotest"/head-name)" && | |
122 | onto="$(cat "$dotest"/onto)" && | |
123 | orig_head="$(cat "$dotest"/orig-head)" | |
124 | case "$head_name" in | |
125 | refs/*) | |
126 | message="rebase finished: $head_name onto $onto" | |
127 | git update-ref -m "$message" \ | |
128 | $head_name $(git rev-parse HEAD) $orig_head && | |
129 | git symbolic-ref HEAD $head_name || | |
130 | die "Could not move back to $head_name" | |
131 | ;; | |
132 | esac | |
133 | } | |
134 | ||
58634dbf | 135 | finish_rb_merge () { |
6fd2f5e6 | 136 | move_to_original_branch |
58634dbf EW |
137 | rm -r "$dotest" |
138 | echo "All done." | |
139 | } | |
140 | ||
1b1dce4b JS |
141 | is_interactive () { |
142 | test -f "$dotest"/interactive || | |
822f7c73 | 143 | while :; do case $#,"$1" in 0,|*,-i|*,--interactive) break ;; esac |
1b1dce4b JS |
144 | shift |
145 | done && test -n "$1" | |
146 | } | |
147 | ||
148 | is_interactive "$@" && exec git-rebase--interactive "$@" | |
149 | ||
822f7c73 | 150 | while test $# != 0 |
e646c9c8 JH |
151 | do |
152 | case "$1" in | |
031321c6 | 153 | --continue) |
5be60078 | 154 | git diff-files --quiet || { |
06aff47b | 155 | echo "You must edit all merge conflicts and then" |
9b07873a | 156 | echo "mark them as resolved using git add" |
031321c6 | 157 | exit 1 |
06aff47b | 158 | } |
58634dbf EW |
159 | if test -d "$dotest" |
160 | then | |
889a50e9 JS |
161 | prev_head=$(cat "$dotest/prev_head") |
162 | end=$(cat "$dotest/end") | |
163 | msgnum=$(cat "$dotest/msgnum") | |
164 | onto=$(cat "$dotest/onto") | |
58634dbf EW |
165 | continue_merge |
166 | while test "$msgnum" -le "$end" | |
167 | do | |
168 | call_merge "$msgnum" | |
169 | continue_merge | |
170 | done | |
171 | finish_rb_merge | |
172 | exit | |
173 | fi | |
3f735b66 JS |
174 | head_name=$(cat .dotest/head-name) && |
175 | onto=$(cat .dotest/onto) && | |
176 | orig_head=$(cat .dotest/orig-head) && | |
177 | git am --resolved --3way --resolvemsg="$RESOLVEMSG" && | |
178 | move_to_original_branch | |
cc120056 SE |
179 | exit |
180 | ;; | |
181 | --skip) | |
fb6e4e1f | 182 | git reset --hard HEAD || exit $? |
58634dbf EW |
183 | if test -d "$dotest" |
184 | then | |
b4372ef1 | 185 | git rerere clear |
889a50e9 JS |
186 | prev_head=$(cat "$dotest/prev_head") |
187 | end=$(cat "$dotest/end") | |
188 | msgnum=$(cat "$dotest/msgnum") | |
d5e673b6 | 189 | msgnum=$(($msgnum + 1)) |
889a50e9 | 190 | onto=$(cat "$dotest/onto") |
d5e673b6 EW |
191 | while test "$msgnum" -le "$end" |
192 | do | |
193 | call_merge "$msgnum" | |
194 | continue_merge | |
195 | done | |
196 | finish_rb_merge | |
197 | exit | |
58634dbf | 198 | fi |
6fd2f5e6 JS |
199 | head_name=$(cat .dotest/head-name) && |
200 | onto=$(cat .dotest/onto) && | |
201 | orig_head=$(cat .dotest/orig-head) && | |
202 | git am -3 --skip --resolvemsg="$RESOLVEMSG" && | |
203 | move_to_original_branch | |
031321c6 SE |
204 | exit |
205 | ;; | |
206 | --abort) | |
b4372ef1 | 207 | git rerere clear |
58634dbf EW |
208 | if test -d "$dotest" |
209 | then | |
6fd2f5e6 | 210 | move_to_original_branch |
58634dbf EW |
211 | rm -r "$dotest" |
212 | elif test -d .dotest | |
213 | then | |
6fd2f5e6 JS |
214 | dotest=.dotest |
215 | move_to_original_branch | |
58634dbf EW |
216 | rm -r .dotest |
217 | else | |
218 | die "No rebase in progress?" | |
219 | fi | |
031321c6 | 220 | git reset --hard ORIG_HEAD |
031321c6 SE |
221 | exit |
222 | ;; | |
e646c9c8 JH |
223 | --onto) |
224 | test 2 -le "$#" || usage | |
225 | newbase="$2" | |
226 | shift | |
227 | ;; | |
58634dbf EW |
228 | -M|-m|--m|--me|--mer|--merg|--merge) |
229 | do_merge=t | |
230 | ;; | |
231 | -s=*|--s=*|--st=*|--str=*|--stra=*|--strat=*|--strate=*|\ | |
232 | --strateg=*|--strategy=*|\ | |
233 | -s|--s|--st|--str|--stra|--strat|--strate|--strateg|--strategy) | |
234 | case "$#,$1" in | |
235 | *,*=*) | |
8096fae7 | 236 | strategy=`expr "z$1" : 'z-[^=]*=\(.*\)'` ;; |
58634dbf EW |
237 | 1,*) |
238 | usage ;; | |
239 | *) | |
240 | strategy="$2" | |
241 | shift ;; | |
242 | esac | |
243 | do_merge=t | |
244 | ;; | |
b758789c RS |
245 | -v|--verbose) |
246 | verbose=t | |
247 | ;; | |
059f446d BF |
248 | --whitespace=*) |
249 | git_am_opt="$git_am_opt $1" | |
250 | ;; | |
67dad687 | 251 | -C*) |
059f446d | 252 | git_am_opt="$git_am_opt $1" |
67dad687 | 253 | ;; |
e646c9c8 JH |
254 | -*) |
255 | usage | |
256 | ;; | |
257 | *) | |
258 | break | |
259 | ;; | |
260 | esac | |
261 | shift | |
262 | done | |
2db8aaec | 263 | |
7f4bd5d8 | 264 | # Make sure we do not have .dotest |
58634dbf | 265 | if test -z "$do_merge" |
7f4bd5d8 | 266 | then |
58634dbf EW |
267 | if mkdir .dotest |
268 | then | |
269 | rmdir .dotest | |
270 | else | |
271 | echo >&2 ' | |
7f4bd5d8 JH |
272 | It seems that I cannot create a .dotest directory, and I wonder if you |
273 | are in the middle of patch application or another rebase. If that is not | |
274 | the case, please rm -fr .dotest and run me again. I am stopping in case | |
275 | you still have something valuable there.' | |
58634dbf EW |
276 | exit 1 |
277 | fi | |
278 | else | |
279 | if test -d "$dotest" | |
280 | then | |
281 | die "previous dotest directory $dotest still exists." \ | |
282 | 'try git-rebase < --continue | --abort >' | |
283 | fi | |
7f4bd5d8 JH |
284 | fi |
285 | ||
7f59dbbb | 286 | # The tree must be really really clean. |
5be60078 | 287 | git update-index --refresh || exit |
38762c47 | 288 | diff=$(git diff-index --cached --name-status -r HEAD --) |
32d99544 | 289 | case "$diff" in |
6e598c32 DK |
290 | ?*) echo "cannot rebase: your index is not up-to-date" |
291 | echo "$diff" | |
7f59dbbb JH |
292 | exit 1 |
293 | ;; | |
294 | esac | |
99a92f92 | 295 | |
e646c9c8 JH |
296 | # The upstream head must be given. Make sure it is valid. |
297 | upstream_name="$1" | |
298 | upstream=`git rev-parse --verify "${upstream_name}^0"` || | |
d0080b3c | 299 | die "invalid upstream $upstream_name" |
32d99544 | 300 | |
a1bf91e0 JH |
301 | # Make sure the branch to rebase onto is valid. |
302 | onto_name=${newbase-"$upstream_name"} | |
5be60078 | 303 | onto=$(git rev-parse --verify "${onto_name}^0") || exit |
a1bf91e0 | 304 | |
9a111c91 JH |
305 | # If a hook exists, give it a chance to interrupt |
306 | if test -x "$GIT_DIR/hooks/pre-rebase" | |
307 | then | |
308 | "$GIT_DIR/hooks/pre-rebase" ${1+"$@"} || { | |
309 | echo >&2 "The pre-rebase hook refused to rebase." | |
310 | exit 1 | |
311 | } | |
312 | fi | |
313 | ||
7f59dbbb | 314 | # If the branch to rebase is given, first switch to it. |
59e6b23a | 315 | case "$#" in |
7f59dbbb | 316 | 2) |
e646c9c8 | 317 | branch_name="$2" |
3ae39ab2 | 318 | git-checkout "$2" || usage |
e646c9c8 JH |
319 | ;; |
320 | *) | |
bcf31618 JH |
321 | if branch_name=`git symbolic-ref -q HEAD` |
322 | then | |
323 | branch_name=`expr "z$branch_name" : 'zrefs/heads/\(.*\)'` | |
324 | else | |
325 | branch_name=HEAD ;# detached | |
326 | fi | |
e646c9c8 | 327 | ;; |
59e6b23a | 328 | esac |
5be60078 | 329 | branch=$(git rev-parse --verify "${branch_name}^0") || exit |
59e6b23a | 330 | |
e646c9c8 JH |
331 | # Now we are rebasing commits $upstream..$branch on top of $onto |
332 | ||
1308c17b JS |
333 | # Check if we are already based on $onto with linear history, |
334 | # but this should be done only when upstream and onto are the same. | |
5be60078 | 335 | mb=$(git merge-base "$onto" "$branch") |
1308c17b JS |
336 | if test "$upstream" = "$onto" && test "$mb" = "$onto" && |
337 | # linear history? | |
338 | ! git rev-list --parents "$onto".."$branch" | grep " .* " > /dev/null | |
7f4bd5d8 | 339 | then |
83c31614 RS |
340 | echo >&2 "Current branch $branch_name is up to date." |
341 | exit 0 | |
7f4bd5d8 JH |
342 | fi |
343 | ||
b758789c RS |
344 | if test -n "$verbose" |
345 | then | |
346 | echo "Changes from $mb to $onto:" | |
fefe49d1 | 347 | # We want color (if set), but no pager |
5be60078 | 348 | GIT_PAGER='' git diff --stat --summary "$mb" "$onto" |
b758789c RS |
349 | fi |
350 | ||
6fd2f5e6 JS |
351 | # move to a detached HEAD |
352 | orig_head=$(git rev-parse HEAD^0) | |
353 | head_name=$(git symbolic-ref HEAD 2> /dev/null) | |
354 | case "$head_name" in | |
355 | '') | |
356 | head_name="detached HEAD" | |
357 | ;; | |
358 | *) | |
359 | git checkout "$orig_head" > /dev/null 2>&1 || | |
360 | die "could not detach HEAD" | |
361 | ;; | |
362 | esac | |
363 | ||
e646c9c8 | 364 | # Rewind the head to "$onto"; this saves our current head in ORIG_HEAD. |
228e2eb6 | 365 | echo "First, rewinding head to replay your work on top of it..." |
e646c9c8 | 366 | git-reset --hard "$onto" |
32d99544 | 367 | |
e646c9c8 | 368 | # If the $onto is a proper descendant of the tip of the branch, then |
32d99544 | 369 | # we just fast forwarded. |
83c31614 | 370 | if test "$mb" = "$branch" |
32d99544 | 371 | then |
d587ed13 | 372 | echo >&2 "Fast-forwarded $branch_name to $onto_name." |
6fd2f5e6 | 373 | move_to_original_branch |
32d99544 LS |
374 | exit 0 |
375 | fi | |
376 | ||
58634dbf EW |
377 | if test -z "$do_merge" |
378 | then | |
5be60078 | 379 | git format-patch -k --stdout --full-index --ignore-if-in-upstream "$upstream"..ORIG_HEAD | |
6fd2f5e6 JS |
380 | git am $git_am_opt --binary -3 -k --resolvemsg="$RESOLVEMSG" && |
381 | move_to_original_branch | |
382 | ret=$? | |
383 | test 0 != $ret -a -d .dotest && | |
384 | echo $head_name > .dotest/head-name && | |
385 | echo $onto > .dotest/onto && | |
386 | echo $orig_head > .dotest/orig-head | |
387 | exit $ret | |
58634dbf EW |
388 | fi |
389 | ||
390 | # start doing a rebase with git-merge | |
391 | # this is rename-aware if the recursive (default) strategy is used | |
392 | ||
393 | mkdir -p "$dotest" | |
394 | echo "$onto" > "$dotest/onto" | |
0bb733c9 | 395 | echo "$onto_name" > "$dotest/onto_name" |
6fd2f5e6 | 396 | prev_head=$orig_head |
58634dbf | 397 | echo "$prev_head" > "$dotest/prev_head" |
6fd2f5e6 JS |
398 | echo "$orig_head" > "$dotest/orig-head" |
399 | echo "$head_name" > "$dotest/head-name" | |
58634dbf EW |
400 | |
401 | msgnum=0 | |
5be60078 | 402 | for cmt in `git rev-list --reverse --no-merges "$upstream"..ORIG_HEAD` |
58634dbf EW |
403 | do |
404 | msgnum=$(($msgnum + 1)) | |
5887ac82 | 405 | echo "$cmt" > "$dotest/cmt.$msgnum" |
58634dbf EW |
406 | done |
407 | ||
5887ac82 JH |
408 | echo 1 >"$dotest/msgnum" |
409 | echo $msgnum >"$dotest/end" | |
58634dbf EW |
410 | |
411 | end=$msgnum | |
412 | msgnum=1 | |
413 | ||
414 | while test "$msgnum" -le "$end" | |
415 | do | |
416 | call_merge "$msgnum" | |
417 | continue_merge | |
418 | done | |
cc120056 | 419 | |
58634dbf | 420 | finish_rb_merge |