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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 | 20 | Note that if <branch> is not specified on the command line, the |
702088af | 21 | currently checked out branch is used. |
e646c9c8 | 22 | |
031321c6 | 23 | Example: git-rebase master~1 topic |
e646c9c8 | 24 | |
031321c6 SE |
25 | A---B---C topic A'\''--B'\''--C'\'' topic |
26 | / --> / | |
27 | D---E---F---G master D---E---F---G master | |
e646c9c8 | 28 | ' |
533b7039 JH |
29 | |
30 | SUBDIRECTORY_OK=Yes | |
8f321a39 | 31 | OPTIONS_SPEC= |
ae2b0f15 | 32 | . git-sh-setup |
f9474132 | 33 | set_reflog_action rebase |
7eff28a9 | 34 | require_work_tree |
533b7039 | 35 | cd_to_toplevel |
4282c4fb | 36 | |
cc120056 SE |
37 | RESOLVEMSG=" |
38 | When you have resolved this problem run \"git rebase --continue\". | |
39 | If you would prefer to skip this patch, instead run \"git rebase --skip\". | |
40 | To restore the original branch and stop rebasing run \"git rebase --abort\". | |
41 | " | |
e646c9c8 | 42 | unset newbase |
a06f678e | 43 | strategy=recursive |
58634dbf EW |
44 | do_merge= |
45 | dotest=$GIT_DIR/.dotest-merge | |
46 | prec=4 | |
b758789c | 47 | verbose= |
67dad687 | 48 | git_am_opt= |
58634dbf EW |
49 | |
50 | continue_merge () { | |
51 | test -n "$prev_head" || die "prev_head must be defined" | |
52 | test -d "$dotest" || die "$dotest directory does not exist" | |
53 | ||
5be60078 | 54 | unmerged=$(git ls-files -u) |
58634dbf EW |
55 | if test -n "$unmerged" |
56 | then | |
57 | echo "You still have unmerged paths in your index" | |
9b07873a | 58 | echo "did you forget to use git add?" |
66eb64cb | 59 | die "$RESOLVEMSG" |
58634dbf EW |
60 | fi |
61 | ||
889a50e9 | 62 | cmt=`cat "$dotest/current"` |
6848d58c | 63 | if ! git diff-index --quiet --ignore-submodules HEAD -- |
58634dbf | 64 | then |
e637122e | 65 | if ! git commit --no-verify -C "$cmt" |
f0ef0596 EW |
66 | then |
67 | echo "Commit failed, please do not call \"git commit\"" | |
68 | echo "directly, but instead do one of the following: " | |
69 | die "$RESOLVEMSG" | |
70 | fi | |
7afa845e | 71 | printf "Committed: %0${prec}d " $msgnum |
58634dbf | 72 | else |
7afa845e | 73 | printf "Already applied: %0${prec}d " $msgnum |
58634dbf | 74 | fi |
c7965afd | 75 | git rev-list --pretty=oneline -1 "$cmt" | sed -e 's/^[^ ]* //' |
58634dbf | 76 | |
5be60078 | 77 | prev_head=`git rev-parse HEAD^0` |
58634dbf | 78 | # save the resulting commit so we can read-tree on it later |
58634dbf EW |
79 | echo "$prev_head" > "$dotest/prev_head" |
80 | ||
81 | # onto the next patch: | |
82 | msgnum=$(($msgnum + 1)) | |
5887ac82 | 83 | echo "$msgnum" >"$dotest/msgnum" |
58634dbf EW |
84 | } |
85 | ||
86 | call_merge () { | |
889a50e9 | 87 | cmt="$(cat "$dotest/cmt.$1")" |
58634dbf | 88 | echo "$cmt" > "$dotest/current" |
5be60078 | 89 | hd=$(git rev-parse --verify HEAD) |
6fd2f5e6 | 90 | cmt_name=$(git symbolic-ref HEAD 2> /dev/null || echo HEAD) |
889a50e9 JS |
91 | msgnum=$(cat "$dotest/msgnum") |
92 | end=$(cat "$dotest/end") | |
0bb733c9 | 93 | eval GITHEAD_$cmt='"${cmt_name##refs/heads/}~$(($end - $msgnum))"' |
889a50e9 | 94 | eval GITHEAD_$hd='$(cat "$dotest/onto_name")' |
0bb733c9 SP |
95 | export GITHEAD_$cmt GITHEAD_$hd |
96 | git-merge-$strategy "$cmt^" -- "$hd" "$cmt" | |
58634dbf EW |
97 | rv=$? |
98 | case "$rv" in | |
99 | 0) | |
0bb733c9 | 100 | unset GITHEAD_$cmt GITHEAD_$hd |
9e4bc7dd | 101 | return |
58634dbf EW |
102 | ;; |
103 | 1) | |
b4372ef1 | 104 | git rerere |
66eb64cb | 105 | die "$RESOLVEMSG" |
58634dbf EW |
106 | ;; |
107 | 2) | |
108 | echo "Strategy: $rv $strategy failed, try another" 1>&2 | |
66eb64cb | 109 | die "$RESOLVEMSG" |
58634dbf EW |
110 | ;; |
111 | *) | |
112 | die "Unknown exit code ($rv) from command:" \ | |
113 | "git-merge-$strategy $cmt^ -- HEAD $cmt" | |
114 | ;; | |
115 | esac | |
116 | } | |
117 | ||
6fd2f5e6 JS |
118 | move_to_original_branch () { |
119 | test -z "$head_name" && | |
120 | head_name="$(cat "$dotest"/head-name)" && | |
121 | onto="$(cat "$dotest"/onto)" && | |
122 | orig_head="$(cat "$dotest"/orig-head)" | |
123 | case "$head_name" in | |
124 | refs/*) | |
125 | message="rebase finished: $head_name onto $onto" | |
126 | git update-ref -m "$message" \ | |
127 | $head_name $(git rev-parse HEAD) $orig_head && | |
128 | git symbolic-ref HEAD $head_name || | |
129 | die "Could not move back to $head_name" | |
130 | ;; | |
131 | esac | |
132 | } | |
133 | ||
58634dbf | 134 | finish_rb_merge () { |
6fd2f5e6 | 135 | move_to_original_branch |
58634dbf EW |
136 | rm -r "$dotest" |
137 | echo "All done." | |
138 | } | |
139 | ||
1b1dce4b JS |
140 | is_interactive () { |
141 | test -f "$dotest"/interactive || | |
822f7c73 | 142 | while :; do case $#,"$1" in 0,|*,-i|*,--interactive) break ;; esac |
1b1dce4b JS |
143 | shift |
144 | done && test -n "$1" | |
145 | } | |
146 | ||
147 | is_interactive "$@" && exec git-rebase--interactive "$@" | |
148 | ||
822f7c73 | 149 | while test $# != 0 |
e646c9c8 JH |
150 | do |
151 | case "$1" in | |
031321c6 | 152 | --continue) |
6848d58c | 153 | git diff-files --quiet --ignore-submodules || { |
06aff47b | 154 | echo "You must edit all merge conflicts and then" |
9b07873a | 155 | echo "mark them as resolved using git add" |
031321c6 | 156 | exit 1 |
06aff47b | 157 | } |
58634dbf EW |
158 | if test -d "$dotest" |
159 | then | |
889a50e9 JS |
160 | prev_head=$(cat "$dotest/prev_head") |
161 | end=$(cat "$dotest/end") | |
162 | msgnum=$(cat "$dotest/msgnum") | |
163 | onto=$(cat "$dotest/onto") | |
58634dbf EW |
164 | continue_merge |
165 | while test "$msgnum" -le "$end" | |
166 | do | |
167 | call_merge "$msgnum" | |
168 | continue_merge | |
169 | done | |
170 | finish_rb_merge | |
171 | exit | |
172 | fi | |
3f735b66 JS |
173 | head_name=$(cat .dotest/head-name) && |
174 | onto=$(cat .dotest/onto) && | |
175 | orig_head=$(cat .dotest/orig-head) && | |
176 | git am --resolved --3way --resolvemsg="$RESOLVEMSG" && | |
177 | move_to_original_branch | |
cc120056 SE |
178 | exit |
179 | ;; | |
180 | --skip) | |
fb6e4e1f | 181 | git reset --hard HEAD || exit $? |
58634dbf EW |
182 | if test -d "$dotest" |
183 | then | |
b4372ef1 | 184 | git rerere clear |
889a50e9 JS |
185 | prev_head=$(cat "$dotest/prev_head") |
186 | end=$(cat "$dotest/end") | |
187 | msgnum=$(cat "$dotest/msgnum") | |
d5e673b6 | 188 | msgnum=$(($msgnum + 1)) |
889a50e9 | 189 | onto=$(cat "$dotest/onto") |
d5e673b6 EW |
190 | while test "$msgnum" -le "$end" |
191 | do | |
192 | call_merge "$msgnum" | |
193 | continue_merge | |
194 | done | |
195 | finish_rb_merge | |
196 | exit | |
58634dbf | 197 | fi |
6fd2f5e6 JS |
198 | head_name=$(cat .dotest/head-name) && |
199 | onto=$(cat .dotest/onto) && | |
200 | orig_head=$(cat .dotest/orig-head) && | |
201 | git am -3 --skip --resolvemsg="$RESOLVEMSG" && | |
202 | move_to_original_branch | |
031321c6 SE |
203 | exit |
204 | ;; | |
205 | --abort) | |
b4372ef1 | 206 | git rerere clear |
58634dbf EW |
207 | if test -d "$dotest" |
208 | then | |
6fd2f5e6 | 209 | move_to_original_branch |
58634dbf EW |
210 | elif test -d .dotest |
211 | then | |
6fd2f5e6 JS |
212 | dotest=.dotest |
213 | move_to_original_branch | |
58634dbf EW |
214 | else |
215 | die "No rebase in progress?" | |
216 | fi | |
97b88dd5 | 217 | git reset --hard $(cat "$dotest/orig-head") |
48411d22 | 218 | rm -r "$dotest" |
031321c6 SE |
219 | exit |
220 | ;; | |
e646c9c8 JH |
221 | --onto) |
222 | test 2 -le "$#" || usage | |
223 | newbase="$2" | |
224 | shift | |
225 | ;; | |
58634dbf EW |
226 | -M|-m|--m|--me|--mer|--merg|--merge) |
227 | do_merge=t | |
228 | ;; | |
229 | -s=*|--s=*|--st=*|--str=*|--stra=*|--strat=*|--strate=*|\ | |
230 | --strateg=*|--strategy=*|\ | |
231 | -s|--s|--st|--str|--stra|--strat|--strate|--strateg|--strategy) | |
232 | case "$#,$1" in | |
233 | *,*=*) | |
8096fae7 | 234 | strategy=`expr "z$1" : 'z-[^=]*=\(.*\)'` ;; |
58634dbf EW |
235 | 1,*) |
236 | usage ;; | |
237 | *) | |
238 | strategy="$2" | |
239 | shift ;; | |
240 | esac | |
241 | do_merge=t | |
242 | ;; | |
b758789c RS |
243 | -v|--verbose) |
244 | verbose=t | |
245 | ;; | |
059f446d BF |
246 | --whitespace=*) |
247 | git_am_opt="$git_am_opt $1" | |
248 | ;; | |
67dad687 | 249 | -C*) |
059f446d | 250 | git_am_opt="$git_am_opt $1" |
67dad687 | 251 | ;; |
e646c9c8 JH |
252 | -*) |
253 | usage | |
254 | ;; | |
255 | *) | |
256 | break | |
257 | ;; | |
258 | esac | |
259 | shift | |
260 | done | |
2db8aaec | 261 | |
7f4bd5d8 | 262 | # Make sure we do not have .dotest |
58634dbf | 263 | if test -z "$do_merge" |
7f4bd5d8 | 264 | then |
58634dbf EW |
265 | if mkdir .dotest |
266 | then | |
267 | rmdir .dotest | |
268 | else | |
269 | echo >&2 ' | |
7f4bd5d8 JH |
270 | It seems that I cannot create a .dotest directory, and I wonder if you |
271 | are in the middle of patch application or another rebase. If that is not | |
272 | the case, please rm -fr .dotest and run me again. I am stopping in case | |
273 | you still have something valuable there.' | |
58634dbf EW |
274 | exit 1 |
275 | fi | |
276 | else | |
277 | if test -d "$dotest" | |
278 | then | |
279 | die "previous dotest directory $dotest still exists." \ | |
280 | 'try git-rebase < --continue | --abort >' | |
281 | fi | |
7f4bd5d8 JH |
282 | fi |
283 | ||
7f59dbbb | 284 | # The tree must be really really clean. |
6848d58c JS |
285 | git update-index --ignore-submodules --refresh || exit |
286 | diff=$(git diff-index --cached --name-status -r --ignore-submodules HEAD --) | |
32d99544 | 287 | case "$diff" in |
6e598c32 DK |
288 | ?*) echo "cannot rebase: your index is not up-to-date" |
289 | echo "$diff" | |
7f59dbbb JH |
290 | exit 1 |
291 | ;; | |
292 | esac | |
99a92f92 | 293 | |
e646c9c8 JH |
294 | # The upstream head must be given. Make sure it is valid. |
295 | upstream_name="$1" | |
296 | upstream=`git rev-parse --verify "${upstream_name}^0"` || | |
d0080b3c | 297 | die "invalid upstream $upstream_name" |
32d99544 | 298 | |
a1bf91e0 JH |
299 | # Make sure the branch to rebase onto is valid. |
300 | onto_name=${newbase-"$upstream_name"} | |
5be60078 | 301 | onto=$(git rev-parse --verify "${onto_name}^0") || exit |
a1bf91e0 | 302 | |
9a111c91 JH |
303 | # If a hook exists, give it a chance to interrupt |
304 | if test -x "$GIT_DIR/hooks/pre-rebase" | |
305 | then | |
306 | "$GIT_DIR/hooks/pre-rebase" ${1+"$@"} || { | |
307 | echo >&2 "The pre-rebase hook refused to rebase." | |
308 | exit 1 | |
309 | } | |
310 | fi | |
311 | ||
0cb06644 JH |
312 | # If the branch to rebase is given, that is the branch we will rebase |
313 | # $branch_name -- branch being rebased, or HEAD (already detached) | |
314 | # $orig_head -- commit object name of tip of the branch before rebasing | |
315 | # $head_name -- refs/heads/<that-branch> or "detached HEAD" | |
316 | switch_to= | |
59e6b23a | 317 | case "$#" in |
7f59dbbb | 318 | 2) |
0cb06644 | 319 | # Is it "rebase other $branchname" or "rebase other $commit"? |
e646c9c8 | 320 | branch_name="$2" |
0cb06644 JH |
321 | switch_to="$2" |
322 | ||
323 | if git show-ref --verify --quiet -- "refs/heads/$2" && | |
324 | branch=$(git rev-parse --verify "refs/heads/$2" 2>/dev/null) | |
325 | then | |
326 | head_name="refs/heads/$2" | |
327 | elif branch=$(git rev-parse --verify "$2" 2>/dev/null) | |
328 | then | |
329 | head_name="detached HEAD" | |
330 | else | |
331 | usage | |
332 | fi | |
e646c9c8 JH |
333 | ;; |
334 | *) | |
0cb06644 | 335 | # Do not need to switch branches, we are already on it. |
bcf31618 JH |
336 | if branch_name=`git symbolic-ref -q HEAD` |
337 | then | |
0cb06644 | 338 | head_name=$branch_name |
bcf31618 JH |
339 | branch_name=`expr "z$branch_name" : 'zrefs/heads/\(.*\)'` |
340 | else | |
0cb06644 | 341 | head_name="detached HEAD" |
bcf31618 JH |
342 | branch_name=HEAD ;# detached |
343 | fi | |
0cb06644 | 344 | branch=$(git rev-parse --verify "${branch_name}^0") || exit |
e646c9c8 | 345 | ;; |
59e6b23a | 346 | esac |
0cb06644 | 347 | orig_head=$branch |
59e6b23a | 348 | |
e646c9c8 JH |
349 | # Now we are rebasing commits $upstream..$branch on top of $onto |
350 | ||
1308c17b JS |
351 | # Check if we are already based on $onto with linear history, |
352 | # but this should be done only when upstream and onto are the same. | |
5be60078 | 353 | mb=$(git merge-base "$onto" "$branch") |
1308c17b JS |
354 | if test "$upstream" = "$onto" && test "$mb" = "$onto" && |
355 | # linear history? | |
bbf08124 | 356 | ! (git rev-list --parents "$onto".."$branch" | grep " .* ") > /dev/null |
7f4bd5d8 | 357 | then |
0cb06644 JH |
358 | # Lazily switch to the target branch if needed... |
359 | test -z "$switch_to" || git checkout "$switch_to" | |
83c31614 RS |
360 | echo >&2 "Current branch $branch_name is up to date." |
361 | exit 0 | |
7f4bd5d8 JH |
362 | fi |
363 | ||
b758789c RS |
364 | if test -n "$verbose" |
365 | then | |
366 | echo "Changes from $mb to $onto:" | |
fefe49d1 | 367 | # We want color (if set), but no pager |
5be60078 | 368 | GIT_PAGER='' git diff --stat --summary "$mb" "$onto" |
b758789c RS |
369 | fi |
370 | ||
0cb06644 | 371 | # Detach HEAD and reset the tree |
228e2eb6 | 372 | echo "First, rewinding head to replay your work on top of it..." |
0cb06644 JH |
373 | git checkout "$onto^0" >/dev/null 2>&1 || |
374 | die "could not detach HEAD" | |
375 | # git reset --hard "$onto^0" | |
32d99544 | 376 | |
e646c9c8 | 377 | # If the $onto is a proper descendant of the tip of the branch, then |
32d99544 | 378 | # we just fast forwarded. |
83c31614 | 379 | if test "$mb" = "$branch" |
32d99544 | 380 | then |
d587ed13 | 381 | echo >&2 "Fast-forwarded $branch_name to $onto_name." |
6fd2f5e6 | 382 | move_to_original_branch |
32d99544 LS |
383 | exit 0 |
384 | fi | |
385 | ||
58634dbf EW |
386 | if test -z "$do_merge" |
387 | then | |
0cb06644 JH |
388 | git format-patch -k --stdout --full-index --ignore-if-in-upstream \ |
389 | "$upstream..$orig_head" | | |
3041c324 | 390 | git am $git_am_opt --rebasing --resolvemsg="$RESOLVEMSG" && |
6fd2f5e6 JS |
391 | move_to_original_branch |
392 | ret=$? | |
393 | test 0 != $ret -a -d .dotest && | |
394 | echo $head_name > .dotest/head-name && | |
395 | echo $onto > .dotest/onto && | |
396 | echo $orig_head > .dotest/orig-head | |
397 | exit $ret | |
58634dbf EW |
398 | fi |
399 | ||
400 | # start doing a rebase with git-merge | |
401 | # this is rename-aware if the recursive (default) strategy is used | |
402 | ||
403 | mkdir -p "$dotest" | |
404 | echo "$onto" > "$dotest/onto" | |
0bb733c9 | 405 | echo "$onto_name" > "$dotest/onto_name" |
6fd2f5e6 | 406 | prev_head=$orig_head |
58634dbf | 407 | echo "$prev_head" > "$dotest/prev_head" |
6fd2f5e6 JS |
408 | echo "$orig_head" > "$dotest/orig-head" |
409 | echo "$head_name" > "$dotest/head-name" | |
58634dbf EW |
410 | |
411 | msgnum=0 | |
0cb06644 | 412 | for cmt in `git rev-list --reverse --no-merges "$upstream..$orig_head"` |
58634dbf EW |
413 | do |
414 | msgnum=$(($msgnum + 1)) | |
5887ac82 | 415 | echo "$cmt" > "$dotest/cmt.$msgnum" |
58634dbf EW |
416 | done |
417 | ||
5887ac82 JH |
418 | echo 1 >"$dotest/msgnum" |
419 | echo $msgnum >"$dotest/end" | |
58634dbf EW |
420 | |
421 | end=$msgnum | |
422 | msgnum=1 | |
423 | ||
424 | while test "$msgnum" -le "$end" | |
425 | do | |
426 | call_merge "$msgnum" | |
427 | continue_merge | |
428 | done | |
cc120056 | 429 | |
58634dbf | 430 | finish_rb_merge |