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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 | ||
e646c9c8 | 6 | USAGE='[--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 | ' |
ae2b0f15 | 30 | . git-sh-setup |
4282c4fb | 31 | |
cc120056 SE |
32 | RESOLVEMSG=" |
33 | When you have resolved this problem run \"git rebase --continue\". | |
34 | If you would prefer to skip this patch, instead run \"git rebase --skip\". | |
35 | To restore the original branch and stop rebasing run \"git rebase --abort\". | |
36 | " | |
e646c9c8 | 37 | unset newbase |
58634dbf EW |
38 | strategy=recursive |
39 | do_merge= | |
40 | dotest=$GIT_DIR/.dotest-merge | |
41 | prec=4 | |
42 | ||
43 | continue_merge () { | |
44 | test -n "$prev_head" || die "prev_head must be defined" | |
45 | test -d "$dotest" || die "$dotest directory does not exist" | |
46 | ||
47 | unmerged=$(git-ls-files -u) | |
48 | if test -n "$unmerged" | |
49 | then | |
50 | echo "You still have unmerged paths in your index" | |
51 | echo "did you forget update-index?" | |
66eb64cb | 52 | die "$RESOLVEMSG" |
58634dbf EW |
53 | fi |
54 | ||
55 | if test -n "`git-diff-index HEAD`" | |
56 | then | |
f0ef0596 EW |
57 | if ! git-commit -C "`cat $dotest/current`" |
58 | then | |
59 | echo "Commit failed, please do not call \"git commit\"" | |
60 | echo "directly, but instead do one of the following: " | |
61 | die "$RESOLVEMSG" | |
62 | fi | |
9e4bc7dd | 63 | printf "Committed: %0${prec}d" $msgnum |
58634dbf | 64 | else |
9e4bc7dd | 65 | printf "Already applied: %0${prec}d" $msgnum |
58634dbf | 66 | fi |
9e4bc7dd EW |
67 | echo ' '`git-rev-list --pretty=oneline -1 HEAD | \ |
68 | sed 's/^[a-f0-9]\+ //'` | |
58634dbf EW |
69 | |
70 | prev_head=`git-rev-parse HEAD^0` | |
58634dbf | 71 | # save the resulting commit so we can read-tree on it later |
58634dbf EW |
72 | echo "$prev_head" > "$dotest/prev_head" |
73 | ||
74 | # onto the next patch: | |
75 | msgnum=$(($msgnum + 1)) | |
5887ac82 | 76 | echo "$msgnum" >"$dotest/msgnum" |
58634dbf EW |
77 | } |
78 | ||
79 | call_merge () { | |
5887ac82 | 80 | cmt="$(cat $dotest/cmt.$1)" |
58634dbf EW |
81 | echo "$cmt" > "$dotest/current" |
82 | git-merge-$strategy "$cmt^" -- HEAD "$cmt" | |
83 | rv=$? | |
84 | case "$rv" in | |
85 | 0) | |
9e4bc7dd | 86 | return |
58634dbf EW |
87 | ;; |
88 | 1) | |
89 | test -d "$GIT_DIR/rr-cache" && git-rerere | |
66eb64cb | 90 | die "$RESOLVEMSG" |
58634dbf EW |
91 | ;; |
92 | 2) | |
93 | echo "Strategy: $rv $strategy failed, try another" 1>&2 | |
66eb64cb | 94 | die "$RESOLVEMSG" |
58634dbf EW |
95 | ;; |
96 | *) | |
97 | die "Unknown exit code ($rv) from command:" \ | |
98 | "git-merge-$strategy $cmt^ -- HEAD $cmt" | |
99 | ;; | |
100 | esac | |
101 | } | |
102 | ||
103 | finish_rb_merge () { | |
58634dbf EW |
104 | rm -r "$dotest" |
105 | echo "All done." | |
106 | } | |
107 | ||
e646c9c8 JH |
108 | while case "$#" in 0) break ;; esac |
109 | do | |
110 | case "$1" in | |
031321c6 SE |
111 | --continue) |
112 | diff=$(git-diff-files) | |
113 | case "$diff" in | |
114 | ?*) echo "You must edit all merge conflicts and then" | |
115 | echo "mark them as resolved using git update-index" | |
116 | exit 1 | |
117 | ;; | |
118 | esac | |
58634dbf EW |
119 | if test -d "$dotest" |
120 | then | |
121 | prev_head="`cat $dotest/prev_head`" | |
122 | end="`cat $dotest/end`" | |
123 | msgnum="`cat $dotest/msgnum`" | |
124 | onto="`cat $dotest/onto`" | |
125 | continue_merge | |
126 | while test "$msgnum" -le "$end" | |
127 | do | |
128 | call_merge "$msgnum" | |
129 | continue_merge | |
130 | done | |
131 | finish_rb_merge | |
132 | exit | |
133 | fi | |
8ef1c7c7 SP |
134 | git am --resolved --3way --resolvemsg="$RESOLVEMSG" \ |
135 | --reflog-action=rebase | |
cc120056 SE |
136 | exit |
137 | ;; | |
138 | --skip) | |
58634dbf EW |
139 | if test -d "$dotest" |
140 | then | |
d5e673b6 EW |
141 | prev_head="`cat $dotest/prev_head`" |
142 | end="`cat $dotest/end`" | |
143 | msgnum="`cat $dotest/msgnum`" | |
144 | msgnum=$(($msgnum + 1)) | |
145 | onto="`cat $dotest/onto`" | |
146 | while test "$msgnum" -le "$end" | |
147 | do | |
148 | call_merge "$msgnum" | |
149 | continue_merge | |
150 | done | |
151 | finish_rb_merge | |
152 | exit | |
58634dbf | 153 | fi |
8ef1c7c7 SP |
154 | git am -3 --skip --resolvemsg="$RESOLVEMSG" \ |
155 | --reflog-action=rebase | |
031321c6 SE |
156 | exit |
157 | ;; | |
158 | --abort) | |
58634dbf EW |
159 | if test -d "$dotest" |
160 | then | |
161 | rm -r "$dotest" | |
162 | elif test -d .dotest | |
163 | then | |
164 | rm -r .dotest | |
165 | else | |
166 | die "No rebase in progress?" | |
167 | fi | |
031321c6 | 168 | git reset --hard ORIG_HEAD |
031321c6 SE |
169 | exit |
170 | ;; | |
e646c9c8 JH |
171 | --onto) |
172 | test 2 -le "$#" || usage | |
173 | newbase="$2" | |
174 | shift | |
175 | ;; | |
58634dbf EW |
176 | -M|-m|--m|--me|--mer|--merg|--merge) |
177 | do_merge=t | |
178 | ;; | |
179 | -s=*|--s=*|--st=*|--str=*|--stra=*|--strat=*|--strate=*|\ | |
180 | --strateg=*|--strategy=*|\ | |
181 | -s|--s|--st|--str|--stra|--strat|--strate|--strateg|--strategy) | |
182 | case "$#,$1" in | |
183 | *,*=*) | |
8096fae7 | 184 | strategy=`expr "z$1" : 'z-[^=]*=\(.*\)'` ;; |
58634dbf EW |
185 | 1,*) |
186 | usage ;; | |
187 | *) | |
188 | strategy="$2" | |
189 | shift ;; | |
190 | esac | |
191 | do_merge=t | |
192 | ;; | |
e646c9c8 JH |
193 | -*) |
194 | usage | |
195 | ;; | |
196 | *) | |
197 | break | |
198 | ;; | |
199 | esac | |
200 | shift | |
201 | done | |
2db8aaec | 202 | |
7f4bd5d8 | 203 | # Make sure we do not have .dotest |
58634dbf | 204 | if test -z "$do_merge" |
7f4bd5d8 | 205 | then |
58634dbf EW |
206 | if mkdir .dotest |
207 | then | |
208 | rmdir .dotest | |
209 | else | |
210 | echo >&2 ' | |
7f4bd5d8 JH |
211 | It seems that I cannot create a .dotest directory, and I wonder if you |
212 | are in the middle of patch application or another rebase. If that is not | |
213 | the case, please rm -fr .dotest and run me again. I am stopping in case | |
214 | you still have something valuable there.' | |
58634dbf EW |
215 | exit 1 |
216 | fi | |
217 | else | |
218 | if test -d "$dotest" | |
219 | then | |
220 | die "previous dotest directory $dotest still exists." \ | |
221 | 'try git-rebase < --continue | --abort >' | |
222 | fi | |
7f4bd5d8 JH |
223 | fi |
224 | ||
7f59dbbb | 225 | # The tree must be really really clean. |
215a7ad1 | 226 | git-update-index --refresh || exit |
7f59dbbb | 227 | diff=$(git-diff-index --cached --name-status -r HEAD) |
32d99544 | 228 | case "$diff" in |
7f59dbbb JH |
229 | ?*) echo "$diff" |
230 | exit 1 | |
231 | ;; | |
232 | esac | |
99a92f92 | 233 | |
e646c9c8 JH |
234 | # The upstream head must be given. Make sure it is valid. |
235 | upstream_name="$1" | |
236 | upstream=`git rev-parse --verify "${upstream_name}^0"` || | |
d0080b3c | 237 | die "invalid upstream $upstream_name" |
32d99544 | 238 | |
9a111c91 JH |
239 | # If a hook exists, give it a chance to interrupt |
240 | if test -x "$GIT_DIR/hooks/pre-rebase" | |
241 | then | |
242 | "$GIT_DIR/hooks/pre-rebase" ${1+"$@"} || { | |
243 | echo >&2 "The pre-rebase hook refused to rebase." | |
244 | exit 1 | |
245 | } | |
246 | fi | |
247 | ||
7f59dbbb | 248 | # If the branch to rebase is given, first switch to it. |
59e6b23a | 249 | case "$#" in |
7f59dbbb | 250 | 2) |
e646c9c8 | 251 | branch_name="$2" |
3ae39ab2 | 252 | git-checkout "$2" || usage |
e646c9c8 JH |
253 | ;; |
254 | *) | |
255 | branch_name=`git symbolic-ref HEAD` || die "No current branch" | |
f327dbce | 256 | branch_name=`expr "z$branch_name" : 'zrefs/heads/\(.*\)'` |
e646c9c8 | 257 | ;; |
59e6b23a | 258 | esac |
e646c9c8 | 259 | branch=$(git-rev-parse --verify "${branch_name}^0") || exit |
59e6b23a | 260 | |
e646c9c8 JH |
261 | # Make sure the branch to rebase onto is valid. |
262 | onto_name=${newbase-"$upstream_name"} | |
263 | onto=$(git-rev-parse --verify "${onto_name}^0") || exit | |
32d99544 | 264 | |
e646c9c8 JH |
265 | # Now we are rebasing commits $upstream..$branch on top of $onto |
266 | ||
267 | # Check if we are already based on $onto, but this should be | |
268 | # done only when upstream and onto are the same. | |
b176e6ba | 269 | if test "$upstream" = "$onto" |
7f4bd5d8 | 270 | then |
e646c9c8 JH |
271 | mb=$(git-merge-base "$onto" "$branch") |
272 | if test "$mb" = "$onto" | |
273 | then | |
274 | echo >&2 "Current branch $branch_name is up to date." | |
275 | exit 0 | |
276 | fi | |
7f4bd5d8 JH |
277 | fi |
278 | ||
e646c9c8 JH |
279 | # Rewind the head to "$onto"; this saves our current head in ORIG_HEAD. |
280 | git-reset --hard "$onto" | |
32d99544 | 281 | |
e646c9c8 | 282 | # If the $onto is a proper descendant of the tip of the branch, then |
32d99544 | 283 | # we just fast forwarded. |
e646c9c8 | 284 | if test "$mb" = "$onto" |
32d99544 | 285 | then |
e646c9c8 | 286 | echo >&2 "Fast-forwarded $branch to $newbase." |
32d99544 LS |
287 | exit 0 |
288 | fi | |
289 | ||
58634dbf EW |
290 | if test -z "$do_merge" |
291 | then | |
292 | git-format-patch -k --stdout --full-index "$upstream"..ORIG_HEAD | | |
8ef1c7c7 SP |
293 | git am --binary -3 -k --resolvemsg="$RESOLVEMSG" \ |
294 | --reflog-action=rebase | |
58634dbf EW |
295 | exit $? |
296 | fi | |
297 | ||
693c15dc EW |
298 | if test "@@NO_PYTHON@@" && test "$strategy" = "recursive" |
299 | then | |
300 | die 'The recursive merge strategy currently relies on Python, | |
301 | which this installation of git was not configured with. Please consider | |
302 | a different merge strategy (e.g. octopus, resolve, stupid, ours) | |
303 | or install Python and git with Python support.' | |
304 | ||
305 | fi | |
306 | ||
58634dbf EW |
307 | # start doing a rebase with git-merge |
308 | # this is rename-aware if the recursive (default) strategy is used | |
309 | ||
310 | mkdir -p "$dotest" | |
311 | echo "$onto" > "$dotest/onto" | |
312 | prev_head=`git-rev-parse HEAD^0` | |
313 | echo "$prev_head" > "$dotest/prev_head" | |
314 | ||
315 | msgnum=0 | |
316 | for cmt in `git-rev-list --no-merges "$upstream"..ORIG_HEAD \ | |
d9bffc08 | 317 | | @@PERL@@ -e 'print reverse <>'` |
58634dbf EW |
318 | do |
319 | msgnum=$(($msgnum + 1)) | |
5887ac82 | 320 | echo "$cmt" > "$dotest/cmt.$msgnum" |
58634dbf EW |
321 | done |
322 | ||
5887ac82 JH |
323 | echo 1 >"$dotest/msgnum" |
324 | echo $msgnum >"$dotest/end" | |
58634dbf EW |
325 | |
326 | end=$msgnum | |
327 | msgnum=1 | |
328 | ||
329 | while test "$msgnum" -le "$end" | |
330 | do | |
331 | call_merge "$msgnum" | |
332 | continue_merge | |
333 | done | |
cc120056 | 334 | |
58634dbf | 335 | finish_rb_merge |