http-push: reuse existing is_null_ref
[git/mingw.git] / git-am.sh
blob578780be138b216dc89333e1fde87ddcb91e5e54
1 #!/bin/sh
3 # Copyright (c) 2005, 2006 Junio C Hamano
5 SUBDIRECTORY_OK=Yes
6 OPTIONS_KEEPDASHDASH=
7 OPTIONS_SPEC="\
8 git am [options] [<mbox>|<Maildir>...]
9 git am [options] (--resolved | --skip | --abort)
11 i,interactive run interactively
12 b,binary* (historical option -- no-op)
13 3,3way allow fall back on 3way merging if needed
14 s,signoff add a Signed-off-by line to the commit message
15 u,utf8 recode into utf8 (default)
16 k,keep pass -k flag to git-mailinfo
17 whitespace= pass it through git-apply
18 directory= pass it through git-apply
19 C= pass it through git-apply
20 p= pass it through git-apply
21 reject pass it through git-apply
22 resolvemsg= override error message when patch failure occurs
23 r,resolved to be used after a patch failure
24 skip skip the current patch
25 abort restore the original branch and abort the patching operation.
26 committer-date-is-author-date lie about committer date
27 ignore-date use current timestamp for author date
28 rebasing* (internal use for git-rebase)"
30 . git-sh-setup
31 prefix=$(git rev-parse --show-prefix)
32 set_reflog_action am
33 require_work_tree
34 cd_to_toplevel
36 git var GIT_COMMITTER_IDENT >/dev/null ||
37 die "You need to set your committer info first"
39 if git rev-parse --verify -q HEAD >/dev/null
40 then
41 HAS_HEAD=yes
42 else
43 HAS_HEAD=
46 sq () {
47 git rev-parse --sq-quote "$@"
50 stop_here () {
51 echo "$1" >"$dotest/next"
52 exit 1
55 stop_here_user_resolve () {
56 if [ -n "$resolvemsg" ]; then
57 printf '%s\n' "$resolvemsg"
58 stop_here $1
60 cmdline="git am"
61 if test '' != "$interactive"
62 then
63 cmdline="$cmdline -i"
65 if test '' != "$threeway"
66 then
67 cmdline="$cmdline -3"
69 echo "When you have resolved this problem run \"$cmdline --resolved\"."
70 echo "If you would prefer to skip this patch, instead run \"$cmdline --skip\"."
71 echo "To restore the original branch and stop patching run \"$cmdline --abort\"."
73 stop_here $1
76 go_next () {
77 rm -f "$dotest/$msgnum" "$dotest/msg" "$dotest/msg-clean" \
78 "$dotest/patch" "$dotest/info"
79 echo "$next" >"$dotest/next"
80 this=$next
83 cannot_fallback () {
84 echo "$1"
85 echo "Cannot fall back to three-way merge."
86 exit 1
89 fall_back_3way () {
90 O_OBJECT=`cd "$GIT_OBJECT_DIRECTORY" && pwd`
92 rm -fr "$dotest"/patch-merge-*
93 mkdir "$dotest/patch-merge-tmp-dir"
95 # First see if the patch records the index info that we can use.
96 git apply --build-fake-ancestor "$dotest/patch-merge-tmp-index" \
97 "$dotest/patch" &&
98 GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
99 git write-tree >"$dotest/patch-merge-base+" ||
100 cannot_fallback "Repository lacks necessary blobs to fall back on 3-way merge."
102 echo Using index info to reconstruct a base tree...
103 if GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
104 git apply --cached <"$dotest/patch"
105 then
106 mv "$dotest/patch-merge-base+" "$dotest/patch-merge-base"
107 mv "$dotest/patch-merge-tmp-index" "$dotest/patch-merge-index"
108 else
109 cannot_fallback "Did you hand edit your patch?
110 It does not apply to blobs recorded in its index."
113 test -f "$dotest/patch-merge-index" &&
114 his_tree=$(GIT_INDEX_FILE="$dotest/patch-merge-index" git write-tree) &&
115 orig_tree=$(cat "$dotest/patch-merge-base") &&
116 rm -fr "$dotest"/patch-merge-* || exit 1
118 echo Falling back to patching base and 3-way merge...
120 # This is not so wrong. Depending on which base we picked,
121 # orig_tree may be wildly different from ours, but his_tree
122 # has the same set of wildly different changes in parts the
123 # patch did not touch, so recursive ends up canceling them,
124 # saying that we reverted all those changes.
126 eval GITHEAD_$his_tree='"$FIRSTLINE"'
127 export GITHEAD_$his_tree
128 git-merge-recursive $orig_tree -- HEAD $his_tree || {
129 git rerere
130 echo Failed to merge in the changes.
131 exit 1
133 unset GITHEAD_$his_tree
136 prec=4
137 dotest="$GIT_DIR/rebase-apply"
138 sign= utf8=t keep= skip= interactive= resolved= rebasing= abort=
139 resolvemsg= resume=
140 git_apply_opt=
141 committer_date_is_author_date=
142 ignore_date=
144 while test $# != 0
146 case "$1" in
147 -i|--interactive)
148 interactive=t ;;
149 -b|--binary)
150 : ;;
151 -3|--3way)
152 threeway=t ;;
153 -s|--signoff)
154 sign=t ;;
155 -u|--utf8)
156 utf8=t ;; # this is now default
157 --no-utf8)
158 utf8= ;;
159 -k|--keep)
160 keep=t ;;
161 -r|--resolved)
162 resolved=t ;;
163 --skip)
164 skip=t ;;
165 --abort)
166 abort=t ;;
167 --rebasing)
168 rebasing=t threeway=t keep=t ;;
169 -d|--dotest)
170 die "-d option is no longer supported. Do not use."
172 --resolvemsg)
173 shift; resolvemsg=$1 ;;
174 --whitespace|--directory)
175 git_apply_opt="$git_apply_opt $(sq "$1=$2")"; shift ;;
176 -C|-p)
177 git_apply_opt="$git_apply_opt $(sq "$1$2")"; shift ;;
178 --reject)
179 git_apply_opt="$git_apply_opt $1" ;;
180 --committer-date-is-author-date)
181 committer_date_is_author_date=t ;;
182 --ignore-date)
183 ignore_date=t ;;
185 shift; break ;;
187 usage ;;
188 esac
189 shift
190 done
192 # If the dotest directory exists, but we have finished applying all the
193 # patches in them, clear it out.
194 if test -d "$dotest" &&
195 last=$(cat "$dotest/last") &&
196 next=$(cat "$dotest/next") &&
197 test $# != 0 &&
198 test "$next" -gt "$last"
199 then
200 rm -fr "$dotest"
203 if test -d "$dotest"
204 then
205 case "$#,$skip$resolved$abort" in
206 0,*t*)
207 # Explicit resume command and we do not have file, so
208 # we are happy.
209 : ;;
211 # No file input but without resume parameters; catch
212 # user error to feed us a patch from standard input
213 # when there is already $dotest. This is somewhat
214 # unreliable -- stdin could be /dev/null for example
215 # and the caller did not intend to feed us a patch but
216 # wanted to continue unattended.
217 test -t 0
220 false
222 esac ||
223 die "previous rebase directory $dotest still exists but mbox given."
224 resume=yes
226 case "$skip,$abort" in
227 t,t)
228 die "Please make up your mind. --skip or --abort?"
231 git rerere clear
232 git read-tree --reset -u HEAD HEAD
233 orig_head=$(cat "$GIT_DIR/ORIG_HEAD")
234 git reset HEAD
235 git update-ref ORIG_HEAD $orig_head
238 if test -f "$dotest/rebasing"
239 then
240 exec git rebase --abort
242 git rerere clear
243 test -f "$dotest/dirtyindex" || {
244 git read-tree --reset -u HEAD ORIG_HEAD
245 git reset ORIG_HEAD
247 rm -fr "$dotest"
248 exit ;;
249 esac
250 rm -f "$dotest/dirtyindex"
251 else
252 # Make sure we are not given --skip, --resolved, nor --abort
253 test "$skip$resolved$abort" = "" ||
254 die "Resolve operation not in progress, we are not resuming."
256 # Start afresh.
257 mkdir -p "$dotest" || exit
259 if test -n "$prefix" && test $# != 0
260 then
261 first=t
262 for arg
264 test -n "$first" && {
265 set x
266 first=
268 case "$arg" in
270 set "$@" "$arg" ;;
272 set "$@" "$prefix$arg" ;;
273 esac
274 done
275 shift
277 git mailsplit -d"$prec" -o"$dotest" -b -- "$@" > "$dotest/last" || {
278 rm -fr "$dotest"
279 exit 1
282 # -s, -u, -k, --whitespace, -3, -C and -p flags are kept
283 # for the resuming session after a patch failure.
284 # -i can and must be given when resuming.
285 echo " $git_apply_opt" >"$dotest/apply-opt"
286 echo "$threeway" >"$dotest/threeway"
287 echo "$sign" >"$dotest/sign"
288 echo "$utf8" >"$dotest/utf8"
289 echo "$keep" >"$dotest/keep"
290 echo 1 >"$dotest/next"
291 if test -n "$rebasing"
292 then
293 : >"$dotest/rebasing"
294 else
295 : >"$dotest/applying"
296 if test -n "$HAS_HEAD"
297 then
298 git update-ref ORIG_HEAD HEAD
299 else
300 git update-ref -d ORIG_HEAD >/dev/null 2>&1
305 case "$resolved" in
307 case "$HAS_HEAD" in
309 files=$(git ls-files) ;;
311 files=$(git diff-index --cached --name-only HEAD --) ;;
312 esac || exit
313 if test "$files"
314 then
315 test -n "$HAS_HEAD" && : >"$dotest/dirtyindex"
316 die "Dirty index: cannot apply patches (dirty: $files)"
318 esac
320 if test "$(cat "$dotest/utf8")" = t
321 then
322 utf8=-u
323 else
324 utf8=-n
326 if test "$(cat "$dotest/keep")" = t
327 then
328 keep=-k
330 if test "$(cat "$dotest/threeway")" = t
331 then
332 threeway=t
334 git_apply_opt=$(cat "$dotest/apply-opt")
335 if test "$(cat "$dotest/sign")" = t
336 then
337 SIGNOFF=`git var GIT_COMMITTER_IDENT | sed -e '
338 s/>.*/>/
339 s/^/Signed-off-by: /'
341 else
342 SIGNOFF=
345 last=`cat "$dotest/last"`
346 this=`cat "$dotest/next"`
347 if test "$skip" = t
348 then
349 this=`expr "$this" + 1`
350 resume=
353 if test "$this" -gt "$last"
354 then
355 echo Nothing to do.
356 rm -fr "$dotest"
357 exit
360 while test "$this" -le "$last"
362 msgnum=`printf "%0${prec}d" $this`
363 next=`expr "$this" + 1`
364 test -f "$dotest/$msgnum" || {
365 resume=
366 go_next
367 continue
370 # If we are not resuming, parse and extract the patch information
371 # into separate files:
372 # - info records the authorship and title
373 # - msg is the rest of commit log message
374 # - patch is the patch body.
376 # When we are resuming, these files are either already prepared
377 # by the user, or the user can tell us to do so by --resolved flag.
378 case "$resume" in
380 git mailinfo $keep $utf8 "$dotest/msg" "$dotest/patch" \
381 <"$dotest/$msgnum" >"$dotest/info" ||
382 stop_here $this
384 # skip pine's internal folder data
385 grep '^Author: Mail System Internal Data$' \
386 <"$dotest"/info >/dev/null &&
387 go_next && continue
389 test -s "$dotest/patch" || {
390 echo "Patch is empty. Was it split wrong?"
391 stop_here $this
393 if test -f "$dotest/rebasing" &&
394 commit=$(sed -e 's/^From \([0-9a-f]*\) .*/\1/' \
395 -e q "$dotest/$msgnum") &&
396 test "$(git cat-file -t "$commit")" = commit
397 then
398 git cat-file commit "$commit" |
399 sed -e '1,/^$/d' >"$dotest/msg-clean"
400 else
401 SUBJECT="$(sed -n '/^Subject/ s/Subject: //p' "$dotest/info")"
402 case "$keep_subject" in -k) SUBJECT="[PATCH] $SUBJECT" ;; esac
404 (printf '%s\n\n' "$SUBJECT"; cat "$dotest/msg") |
405 git stripspace > "$dotest/msg-clean"
408 esac
410 GIT_AUTHOR_NAME="$(sed -n '/^Author/ s/Author: //p' "$dotest/info")"
411 GIT_AUTHOR_EMAIL="$(sed -n '/^Email/ s/Email: //p' "$dotest/info")"
412 GIT_AUTHOR_DATE="$(sed -n '/^Date/ s/Date: //p' "$dotest/info")"
414 if test -z "$GIT_AUTHOR_EMAIL"
415 then
416 echo "Patch does not have a valid e-mail address."
417 stop_here $this
420 export GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL GIT_AUTHOR_DATE
422 case "$resume" in
424 if test '' != "$SIGNOFF"
425 then
426 LAST_SIGNED_OFF_BY=`
427 sed -ne '/^Signed-off-by: /p' \
428 "$dotest/msg-clean" |
429 sed -ne '$p'
431 ADD_SIGNOFF=`
432 test "$LAST_SIGNED_OFF_BY" = "$SIGNOFF" || {
433 test '' = "$LAST_SIGNED_OFF_BY" && echo
434 echo "$SIGNOFF"
436 else
437 ADD_SIGNOFF=
440 if test -s "$dotest/msg-clean"
441 then
442 cat "$dotest/msg-clean"
444 if test '' != "$ADD_SIGNOFF"
445 then
446 echo "$ADD_SIGNOFF"
448 } >"$dotest/final-commit"
451 case "$resolved$interactive" in
453 # This is used only for interactive view option.
454 git diff-index -p --cached HEAD -- >"$dotest/patch"
456 esac
457 esac
459 resume=
460 if test "$interactive" = t
461 then
462 test -t 0 ||
463 die "cannot be interactive without stdin connected to a terminal."
464 action=again
465 while test "$action" = again
467 echo "Commit Body is:"
468 echo "--------------------------"
469 cat "$dotest/final-commit"
470 echo "--------------------------"
471 printf "Apply? [y]es/[n]o/[e]dit/[v]iew patch/[a]ccept all "
472 read reply
473 case "$reply" in
474 [yY]*) action=yes ;;
475 [aA]*) action=yes interactive= ;;
476 [nN]*) action=skip ;;
477 [eE]*) git_editor "$dotest/final-commit"
478 action=again ;;
479 [vV]*) action=again
480 LESS=-S ${PAGER:-less} "$dotest/patch" ;;
481 *) action=again ;;
482 esac
483 done
484 else
485 action=yes
487 FIRSTLINE=$(sed 1q "$dotest/final-commit")
489 if test $action = skip
490 then
491 go_next
492 continue
495 if test -x "$GIT_DIR"/hooks/applypatch-msg
496 then
497 "$GIT_DIR"/hooks/applypatch-msg "$dotest/final-commit" ||
498 stop_here $this
501 printf 'Applying: %s\n' "$FIRSTLINE"
503 case "$resolved" in
505 eval 'git apply '"$git_apply_opt"' --index "$dotest/patch"'
506 apply_status=$?
509 # Resolved means the user did all the hard work, and
510 # we do not have to do any patch application. Just
511 # trust what the user has in the index file and the
512 # working tree.
513 resolved=
514 git diff-index --quiet --cached HEAD -- && {
515 echo "No changes - did you forget to use 'git add'?"
516 stop_here_user_resolve $this
518 unmerged=$(git ls-files -u)
519 if test -n "$unmerged"
520 then
521 echo "You still have unmerged paths in your index"
522 echo "did you forget to use 'git add'?"
523 stop_here_user_resolve $this
525 apply_status=0
526 git rerere
528 esac
530 if test $apply_status = 1 && test "$threeway" = t
531 then
532 if (fall_back_3way)
533 then
534 # Applying the patch to an earlier tree and merging the
535 # result may have produced the same tree as ours.
536 git diff-index --quiet --cached HEAD -- && {
537 echo No changes -- Patch already applied.
538 go_next
539 continue
541 # clear apply_status -- we have successfully merged.
542 apply_status=0
545 if test $apply_status != 0
546 then
547 printf 'Patch failed at %s %s\n' "$msgnum" "$FIRSTLINE"
548 stop_here_user_resolve $this
551 if test -x "$GIT_DIR"/hooks/pre-applypatch
552 then
553 "$GIT_DIR"/hooks/pre-applypatch || stop_here $this
556 tree=$(git write-tree) &&
557 commit=$(
558 if test -n "$ignore_date"
559 then
560 GIT_AUTHOR_DATE=
562 parent=$(git rev-parse --verify -q HEAD) ||
563 echo >&2 "applying to an empty history"
565 if test -n "$committer_date_is_author_date"
566 then
567 GIT_COMMITTER_DATE="$GIT_AUTHOR_DATE"
568 export GIT_COMMITTER_DATE
569 fi &&
570 git commit-tree $tree ${parent:+-p} $parent <"$dotest/final-commit"
571 ) &&
572 git update-ref -m "$GIT_REFLOG_ACTION: $FIRSTLINE" HEAD $commit $parent ||
573 stop_here $this
575 if test -x "$GIT_DIR"/hooks/post-applypatch
576 then
577 "$GIT_DIR"/hooks/post-applypatch
580 go_next
581 done
583 git gc --auto
585 rm -fr "$dotest"