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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 "$1" in | |
031321c6 | 152 | --continue) |
cd5320f2 SB |
153 | test -d "$dotest" -o -d .dotest || |
154 | die "No rebase in progress?" | |
155 | ||
6848d58c | 156 | git diff-files --quiet --ignore-submodules || { |
06aff47b | 157 | echo "You must edit all merge conflicts and then" |
9b07873a | 158 | echo "mark them as resolved using git add" |
031321c6 | 159 | exit 1 |
06aff47b | 160 | } |
58634dbf EW |
161 | if test -d "$dotest" |
162 | then | |
889a50e9 JS |
163 | prev_head=$(cat "$dotest/prev_head") |
164 | end=$(cat "$dotest/end") | |
165 | msgnum=$(cat "$dotest/msgnum") | |
166 | onto=$(cat "$dotest/onto") | |
58634dbf EW |
167 | continue_merge |
168 | while test "$msgnum" -le "$end" | |
169 | do | |
170 | call_merge "$msgnum" | |
171 | continue_merge | |
172 | done | |
173 | finish_rb_merge | |
174 | exit | |
175 | fi | |
3f735b66 JS |
176 | head_name=$(cat .dotest/head-name) && |
177 | onto=$(cat .dotest/onto) && | |
178 | orig_head=$(cat .dotest/orig-head) && | |
179 | git am --resolved --3way --resolvemsg="$RESOLVEMSG" && | |
180 | move_to_original_branch | |
cc120056 SE |
181 | exit |
182 | ;; | |
183 | --skip) | |
cd5320f2 SB |
184 | test -d "$dotest" -o -d .dotest || |
185 | die "No rebase in progress?" | |
186 | ||
fb6e4e1f | 187 | git reset --hard HEAD || exit $? |
58634dbf EW |
188 | if test -d "$dotest" |
189 | then | |
b4372ef1 | 190 | git rerere clear |
889a50e9 JS |
191 | prev_head=$(cat "$dotest/prev_head") |
192 | end=$(cat "$dotest/end") | |
193 | msgnum=$(cat "$dotest/msgnum") | |
d5e673b6 | 194 | msgnum=$(($msgnum + 1)) |
889a50e9 | 195 | onto=$(cat "$dotest/onto") |
d5e673b6 EW |
196 | while test "$msgnum" -le "$end" |
197 | do | |
198 | call_merge "$msgnum" | |
199 | continue_merge | |
200 | done | |
201 | finish_rb_merge | |
202 | exit | |
58634dbf | 203 | fi |
6fd2f5e6 JS |
204 | head_name=$(cat .dotest/head-name) && |
205 | onto=$(cat .dotest/onto) && | |
206 | orig_head=$(cat .dotest/orig-head) && | |
207 | git am -3 --skip --resolvemsg="$RESOLVEMSG" && | |
208 | move_to_original_branch | |
031321c6 SE |
209 | exit |
210 | ;; | |
211 | --abort) | |
cd5320f2 SB |
212 | test -d "$dotest" -o -d .dotest || |
213 | die "No rebase in progress?" | |
214 | ||
b4372ef1 | 215 | git rerere clear |
58634dbf EW |
216 | if test -d "$dotest" |
217 | then | |
6fd2f5e6 | 218 | move_to_original_branch |
cd5320f2 | 219 | else |
6fd2f5e6 JS |
220 | dotest=.dotest |
221 | move_to_original_branch | |
58634dbf | 222 | fi |
97b88dd5 | 223 | git reset --hard $(cat "$dotest/orig-head") |
48411d22 | 224 | rm -r "$dotest" |
031321c6 SE |
225 | exit |
226 | ;; | |
e646c9c8 JH |
227 | --onto) |
228 | test 2 -le "$#" || usage | |
229 | newbase="$2" | |
230 | shift | |
231 | ;; | |
58634dbf EW |
232 | -M|-m|--m|--me|--mer|--merg|--merge) |
233 | do_merge=t | |
234 | ;; | |
235 | -s=*|--s=*|--st=*|--str=*|--stra=*|--strat=*|--strate=*|\ | |
236 | --strateg=*|--strategy=*|\ | |
237 | -s|--s|--st|--str|--stra|--strat|--strate|--strateg|--strategy) | |
238 | case "$#,$1" in | |
239 | *,*=*) | |
8096fae7 | 240 | strategy=`expr "z$1" : 'z-[^=]*=\(.*\)'` ;; |
58634dbf EW |
241 | 1,*) |
242 | usage ;; | |
243 | *) | |
244 | strategy="$2" | |
245 | shift ;; | |
246 | esac | |
247 | do_merge=t | |
248 | ;; | |
b758789c RS |
249 | -v|--verbose) |
250 | verbose=t | |
251 | ;; | |
059f446d BF |
252 | --whitespace=*) |
253 | git_am_opt="$git_am_opt $1" | |
254 | ;; | |
67dad687 | 255 | -C*) |
059f446d | 256 | git_am_opt="$git_am_opt $1" |
67dad687 | 257 | ;; |
e646c9c8 JH |
258 | -*) |
259 | usage | |
260 | ;; | |
261 | *) | |
262 | break | |
263 | ;; | |
264 | esac | |
265 | shift | |
266 | done | |
2db8aaec | 267 | |
7f4bd5d8 | 268 | # Make sure we do not have .dotest |
58634dbf | 269 | if test -z "$do_merge" |
7f4bd5d8 | 270 | then |
58634dbf EW |
271 | if mkdir .dotest |
272 | then | |
273 | rmdir .dotest | |
274 | else | |
275 | echo >&2 ' | |
7f4bd5d8 JH |
276 | It seems that I cannot create a .dotest directory, and I wonder if you |
277 | are in the middle of patch application or another rebase. If that is not | |
278 | the case, please rm -fr .dotest and run me again. I am stopping in case | |
279 | you still have something valuable there.' | |
58634dbf EW |
280 | exit 1 |
281 | fi | |
282 | else | |
283 | if test -d "$dotest" | |
284 | then | |
285 | die "previous dotest directory $dotest still exists." \ | |
286 | 'try git-rebase < --continue | --abort >' | |
287 | fi | |
7f4bd5d8 JH |
288 | fi |
289 | ||
7f59dbbb | 290 | # The tree must be really really clean. |
6848d58c JS |
291 | git update-index --ignore-submodules --refresh || exit |
292 | diff=$(git diff-index --cached --name-status -r --ignore-submodules HEAD --) | |
32d99544 | 293 | case "$diff" in |
6e598c32 DK |
294 | ?*) echo "cannot rebase: your index is not up-to-date" |
295 | echo "$diff" | |
7f59dbbb JH |
296 | exit 1 |
297 | ;; | |
298 | esac | |
99a92f92 | 299 | |
e646c9c8 JH |
300 | # The upstream head must be given. Make sure it is valid. |
301 | upstream_name="$1" | |
302 | upstream=`git rev-parse --verify "${upstream_name}^0"` || | |
d0080b3c | 303 | die "invalid upstream $upstream_name" |
32d99544 | 304 | |
a1bf91e0 JH |
305 | # Make sure the branch to rebase onto is valid. |
306 | onto_name=${newbase-"$upstream_name"} | |
5be60078 | 307 | onto=$(git rev-parse --verify "${onto_name}^0") || exit |
a1bf91e0 | 308 | |
9a111c91 JH |
309 | # If a hook exists, give it a chance to interrupt |
310 | if test -x "$GIT_DIR/hooks/pre-rebase" | |
311 | then | |
312 | "$GIT_DIR/hooks/pre-rebase" ${1+"$@"} || { | |
313 | echo >&2 "The pre-rebase hook refused to rebase." | |
314 | exit 1 | |
315 | } | |
316 | fi | |
317 | ||
0cb06644 JH |
318 | # If the branch to rebase is given, that is the branch we will rebase |
319 | # $branch_name -- branch being rebased, or HEAD (already detached) | |
320 | # $orig_head -- commit object name of tip of the branch before rebasing | |
321 | # $head_name -- refs/heads/<that-branch> or "detached HEAD" | |
322 | switch_to= | |
59e6b23a | 323 | case "$#" in |
7f59dbbb | 324 | 2) |
0cb06644 | 325 | # Is it "rebase other $branchname" or "rebase other $commit"? |
e646c9c8 | 326 | branch_name="$2" |
0cb06644 JH |
327 | switch_to="$2" |
328 | ||
329 | if git show-ref --verify --quiet -- "refs/heads/$2" && | |
330 | branch=$(git rev-parse --verify "refs/heads/$2" 2>/dev/null) | |
331 | then | |
332 | head_name="refs/heads/$2" | |
333 | elif branch=$(git rev-parse --verify "$2" 2>/dev/null) | |
334 | then | |
335 | head_name="detached HEAD" | |
336 | else | |
337 | usage | |
338 | fi | |
e646c9c8 JH |
339 | ;; |
340 | *) | |
0cb06644 | 341 | # Do not need to switch branches, we are already on it. |
bcf31618 JH |
342 | if branch_name=`git symbolic-ref -q HEAD` |
343 | then | |
0cb06644 | 344 | head_name=$branch_name |
bcf31618 JH |
345 | branch_name=`expr "z$branch_name" : 'zrefs/heads/\(.*\)'` |
346 | else | |
0cb06644 | 347 | head_name="detached HEAD" |
bcf31618 JH |
348 | branch_name=HEAD ;# detached |
349 | fi | |
0cb06644 | 350 | branch=$(git rev-parse --verify "${branch_name}^0") || exit |
e646c9c8 | 351 | ;; |
59e6b23a | 352 | esac |
0cb06644 | 353 | orig_head=$branch |
59e6b23a | 354 | |
e646c9c8 JH |
355 | # Now we are rebasing commits $upstream..$branch on top of $onto |
356 | ||
1308c17b JS |
357 | # Check if we are already based on $onto with linear history, |
358 | # but this should be done only when upstream and onto are the same. | |
5be60078 | 359 | mb=$(git merge-base "$onto" "$branch") |
1308c17b JS |
360 | if test "$upstream" = "$onto" && test "$mb" = "$onto" && |
361 | # linear history? | |
bbf08124 | 362 | ! (git rev-list --parents "$onto".."$branch" | grep " .* ") > /dev/null |
7f4bd5d8 | 363 | then |
0cb06644 JH |
364 | # Lazily switch to the target branch if needed... |
365 | test -z "$switch_to" || git checkout "$switch_to" | |
83c31614 RS |
366 | echo >&2 "Current branch $branch_name is up to date." |
367 | exit 0 | |
7f4bd5d8 JH |
368 | fi |
369 | ||
b758789c RS |
370 | if test -n "$verbose" |
371 | then | |
372 | echo "Changes from $mb to $onto:" | |
fefe49d1 | 373 | # We want color (if set), but no pager |
5be60078 | 374 | GIT_PAGER='' git diff --stat --summary "$mb" "$onto" |
b758789c RS |
375 | fi |
376 | ||
0cb06644 | 377 | # Detach HEAD and reset the tree |
228e2eb6 | 378 | echo "First, rewinding head to replay your work on top of it..." |
0cb06644 JH |
379 | git checkout "$onto^0" >/dev/null 2>&1 || |
380 | die "could not detach HEAD" | |
381 | # git reset --hard "$onto^0" | |
32d99544 | 382 | |
e646c9c8 | 383 | # If the $onto is a proper descendant of the tip of the branch, then |
32d99544 | 384 | # we just fast forwarded. |
83c31614 | 385 | if test "$mb" = "$branch" |
32d99544 | 386 | then |
d587ed13 | 387 | echo >&2 "Fast-forwarded $branch_name to $onto_name." |
6fd2f5e6 | 388 | move_to_original_branch |
32d99544 LS |
389 | exit 0 |
390 | fi | |
391 | ||
58634dbf EW |
392 | if test -z "$do_merge" |
393 | then | |
0cb06644 JH |
394 | git format-patch -k --stdout --full-index --ignore-if-in-upstream \ |
395 | "$upstream..$orig_head" | | |
3041c324 | 396 | git am $git_am_opt --rebasing --resolvemsg="$RESOLVEMSG" && |
6fd2f5e6 JS |
397 | move_to_original_branch |
398 | ret=$? | |
399 | test 0 != $ret -a -d .dotest && | |
400 | echo $head_name > .dotest/head-name && | |
401 | echo $onto > .dotest/onto && | |
402 | echo $orig_head > .dotest/orig-head | |
403 | exit $ret | |
58634dbf EW |
404 | fi |
405 | ||
406 | # start doing a rebase with git-merge | |
407 | # this is rename-aware if the recursive (default) strategy is used | |
408 | ||
409 | mkdir -p "$dotest" | |
410 | echo "$onto" > "$dotest/onto" | |
0bb733c9 | 411 | echo "$onto_name" > "$dotest/onto_name" |
6fd2f5e6 | 412 | prev_head=$orig_head |
58634dbf | 413 | echo "$prev_head" > "$dotest/prev_head" |
6fd2f5e6 JS |
414 | echo "$orig_head" > "$dotest/orig-head" |
415 | echo "$head_name" > "$dotest/head-name" | |
58634dbf EW |
416 | |
417 | msgnum=0 | |
0cb06644 | 418 | for cmt in `git rev-list --reverse --no-merges "$upstream..$orig_head"` |
58634dbf EW |
419 | do |
420 | msgnum=$(($msgnum + 1)) | |
5887ac82 | 421 | echo "$cmt" > "$dotest/cmt.$msgnum" |
58634dbf EW |
422 | done |
423 | ||
5887ac82 JH |
424 | echo 1 >"$dotest/msgnum" |
425 | echo $msgnum >"$dotest/end" | |
58634dbf EW |
426 | |
427 | end=$msgnum | |
428 | msgnum=1 | |
429 | ||
430 | while test "$msgnum" -le "$end" | |
431 | do | |
432 | call_merge "$msgnum" | |
433 | continue_merge | |
434 | done | |
cc120056 | 435 | |
58634dbf | 436 | finish_rb_merge |