Improve on 'approxidate'
[git/dscho.git] / git-am.sh
blob3c03f3e0df96f7b993db1c3822d3f3dab8741a4b
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 q,quiet be quiet
15 s,signoff add a Signed-off-by line to the commit message
16 u,utf8 recode into utf8 (default)
17 k,keep pass -k flag to git-mailinfo
18 whitespace= pass it through git-apply
19 ignore-space-change pass it through git-apply
20 ignore-whitespace pass it through git-apply
21 directory= pass it through git-apply
22 C= pass it through git-apply
23 p= pass it through git-apply
24 patch-format= format the patch(es) are in
25 reject pass it through git-apply
26 resolvemsg= override error message when patch failure occurs
27 r,resolved to be used after a patch failure
28 skip skip the current patch
29 abort restore the original branch and abort the patching operation.
30 committer-date-is-author-date lie about committer date
31 ignore-date use current timestamp for author date
32 rebasing* (internal use for git-rebase)"
34 . git-sh-setup
35 prefix=$(git rev-parse --show-prefix)
36 set_reflog_action am
37 require_work_tree
38 cd_to_toplevel
40 git var GIT_COMMITTER_IDENT >/dev/null ||
41 die "You need to set your committer info first"
43 if git rev-parse --verify -q HEAD >/dev/null
44 then
45 HAS_HEAD=yes
46 else
47 HAS_HEAD=
50 sq () {
51 git rev-parse --sq-quote "$@"
54 stop_here () {
55 echo "$1" >"$dotest/next"
56 exit 1
59 stop_here_user_resolve () {
60 if [ -n "$resolvemsg" ]; then
61 printf '%s\n' "$resolvemsg"
62 stop_here $1
64 cmdline="git am"
65 if test '' != "$interactive"
66 then
67 cmdline="$cmdline -i"
69 if test '' != "$threeway"
70 then
71 cmdline="$cmdline -3"
73 echo "When you have resolved this problem run \"$cmdline --resolved\"."
74 echo "If you would prefer to skip this patch, instead run \"$cmdline --skip\"."
75 echo "To restore the original branch and stop patching run \"$cmdline --abort\"."
77 stop_here $1
80 go_next () {
81 rm -f "$dotest/$msgnum" "$dotest/msg" "$dotest/msg-clean" \
82 "$dotest/patch" "$dotest/info"
83 echo "$next" >"$dotest/next"
84 this=$next
87 cannot_fallback () {
88 echo "$1"
89 echo "Cannot fall back to three-way merge."
90 exit 1
93 fall_back_3way () {
94 O_OBJECT=`cd "$GIT_OBJECT_DIRECTORY" && pwd`
96 rm -fr "$dotest"/patch-merge-*
97 mkdir "$dotest/patch-merge-tmp-dir"
99 # First see if the patch records the index info that we can use.
100 git apply --build-fake-ancestor "$dotest/patch-merge-tmp-index" \
101 "$dotest/patch" &&
102 GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
103 git write-tree >"$dotest/patch-merge-base+" ||
104 cannot_fallback "Repository lacks necessary blobs to fall back on 3-way merge."
106 say Using index info to reconstruct a base tree...
107 if GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
108 git apply --cached <"$dotest/patch"
109 then
110 mv "$dotest/patch-merge-base+" "$dotest/patch-merge-base"
111 mv "$dotest/patch-merge-tmp-index" "$dotest/patch-merge-index"
112 else
113 cannot_fallback "Did you hand edit your patch?
114 It does not apply to blobs recorded in its index."
117 test -f "$dotest/patch-merge-index" &&
118 his_tree=$(GIT_INDEX_FILE="$dotest/patch-merge-index" git write-tree) &&
119 orig_tree=$(cat "$dotest/patch-merge-base") &&
120 rm -fr "$dotest"/patch-merge-* || exit 1
122 say Falling back to patching base and 3-way merge...
124 # This is not so wrong. Depending on which base we picked,
125 # orig_tree may be wildly different from ours, but his_tree
126 # has the same set of wildly different changes in parts the
127 # patch did not touch, so recursive ends up canceling them,
128 # saying that we reverted all those changes.
130 eval GITHEAD_$his_tree='"$FIRSTLINE"'
131 export GITHEAD_$his_tree
132 if test -n "$GIT_QUIET"
133 then
134 export GIT_MERGE_VERBOSITY=0
136 git-merge-recursive $orig_tree -- HEAD $his_tree || {
137 git rerere
138 echo Failed to merge in the changes.
139 exit 1
141 unset GITHEAD_$his_tree
144 clean_abort () {
145 test $# = 0 || echo >&2 "$@"
146 rm -fr "$dotest"
147 exit 1
150 patch_format=
152 check_patch_format () {
153 # early return if patch_format was set from the command line
154 if test -n "$patch_format"
155 then
156 return 0
159 # we default to mbox format if input is from stdin and for
160 # directories
161 if test $# = 0 || test "x$1" = "x-" || test -d "$1"
162 then
163 patch_format=mbox
164 return 0
167 # otherwise, check the first few lines of the first patch to try
168 # to detect its format
170 read l1
171 read l2
172 read l3
173 case "$l1" in
174 "From "* | "From: "*)
175 patch_format=mbox
177 '# This series applies on GIT commit'*)
178 patch_format=stgit-series
180 "# HG changeset patch")
181 patch_format=hg
184 # if the second line is empty and the third is
185 # a From, Author or Date entry, this is very
186 # likely an StGIT patch
187 case "$l2,$l3" in
188 ,"From: "* | ,"Author: "* | ,"Date: "*)
189 patch_format=stgit
193 esac
195 esac
196 if test -z "$patch_format" &&
197 test -n "$l1" &&
198 test -n "$l2" &&
199 test -n "$l3"
200 then
201 # This begins with three non-empty lines. Is this a
202 # piece of e-mail a-la RFC2822? Grab all the headers,
203 # discarding the indented remainder of folded lines,
204 # and see if it looks like that they all begin with the
205 # header field names...
206 sed -n -e '/^$/q' -e '/^[ ]/d' -e p "$1" |
207 egrep -v '^[A-Za-z]+(-[A-Za-z]+)*:' >/dev/null ||
208 patch_format=mbox
210 } < "$1" || clean_abort
213 split_patches () {
214 case "$patch_format" in
215 mbox)
216 case "$rebasing" in
218 keep_cr= ;;
220 keep_cr=--keep-cr ;;
221 esac
222 git mailsplit -d"$prec" -o"$dotest" -b $keep_cr -- "$@" > "$dotest/last" ||
223 clean_abort
225 stgit-series)
226 if test $# -ne 1
227 then
228 clean_abort "Only one StGIT patch series can be applied at once"
230 series_dir=`dirname "$1"`
231 series_file="$1"
232 shift
234 set x
235 while read filename
237 set "$@" "$series_dir/$filename"
238 done
239 # remove the safety x
240 shift
241 # remove the arg coming from the first-line comment
242 shift
243 } < "$series_file" || clean_abort
244 # set the patch format appropriately
245 patch_format=stgit
246 # now handle the actual StGIT patches
247 split_patches "$@"
249 stgit)
250 this=0
251 for stgit in "$@"
253 this=`expr "$this" + 1`
254 msgnum=`printf "%0${prec}d" $this`
255 # Perl version of StGIT parse_patch. The first nonemptyline
256 # not starting with Author, From or Date is the
257 # subject, and the body starts with the next nonempty
258 # line not starting with Author, From or Date
259 perl -ne 'BEGIN { $subject = 0 }
260 if ($subject > 1) { print ; }
261 elsif (/^\s+$/) { next ; }
262 elsif (/^Author:/) { print s/Author/From/ ; }
263 elsif (/^(From|Date)/) { print ; }
264 elsif ($subject) {
265 $subject = 2 ;
266 print "\n" ;
267 print ;
268 } else {
269 print "Subject: ", $_ ;
270 $subject = 1;
272 ' < "$stgit" > "$dotest/$msgnum" || clean_abort
273 done
274 echo "$this" > "$dotest/last"
275 this=
276 msgnum=
279 if test -n "$parse_patch" ; then
280 clean_abort "Patch format $patch_format is not supported."
281 else
282 clean_abort "Patch format detection failed."
285 esac
288 prec=4
289 dotest="$GIT_DIR/rebase-apply"
290 sign= utf8=t keep= skip= interactive= resolved= rebasing= abort=
291 resolvemsg= resume=
292 git_apply_opt=
293 committer_date_is_author_date=
294 ignore_date=
296 while test $# != 0
298 case "$1" in
299 -i|--interactive)
300 interactive=t ;;
301 -b|--binary)
302 : ;;
303 -3|--3way)
304 threeway=t ;;
305 -s|--signoff)
306 sign=t ;;
307 -u|--utf8)
308 utf8=t ;; # this is now default
309 --no-utf8)
310 utf8= ;;
311 -k|--keep)
312 keep=t ;;
313 -r|--resolved)
314 resolved=t ;;
315 --skip)
316 skip=t ;;
317 --abort)
318 abort=t ;;
319 --rebasing)
320 rebasing=t threeway=t keep=t ;;
321 -d|--dotest)
322 die "-d option is no longer supported. Do not use."
324 --resolvemsg)
325 shift; resolvemsg=$1 ;;
326 --whitespace|--directory)
327 git_apply_opt="$git_apply_opt $(sq "$1=$2")"; shift ;;
328 -C|-p)
329 git_apply_opt="$git_apply_opt $(sq "$1$2")"; shift ;;
330 --patch-format)
331 shift ; patch_format="$1" ;;
332 --reject|--ignore-whitespace|--ignore-space-change)
333 git_apply_opt="$git_apply_opt $1" ;;
334 --committer-date-is-author-date)
335 committer_date_is_author_date=t ;;
336 --ignore-date)
337 ignore_date=t ;;
338 -q|--quiet)
339 GIT_QUIET=t ;;
341 shift; break ;;
343 usage ;;
344 esac
345 shift
346 done
348 # If the dotest directory exists, but we have finished applying all the
349 # patches in them, clear it out.
350 if test -d "$dotest" &&
351 last=$(cat "$dotest/last") &&
352 next=$(cat "$dotest/next") &&
353 test $# != 0 &&
354 test "$next" -gt "$last"
355 then
356 rm -fr "$dotest"
359 if test -d "$dotest"
360 then
361 case "$#,$skip$resolved$abort" in
362 0,*t*)
363 # Explicit resume command and we do not have file, so
364 # we are happy.
365 : ;;
367 # No file input but without resume parameters; catch
368 # user error to feed us a patch from standard input
369 # when there is already $dotest. This is somewhat
370 # unreliable -- stdin could be /dev/null for example
371 # and the caller did not intend to feed us a patch but
372 # wanted to continue unattended.
373 test -t 0
376 false
378 esac ||
379 die "previous rebase directory $dotest still exists but mbox given."
380 resume=yes
382 case "$skip,$abort" in
383 t,t)
384 die "Please make up your mind. --skip or --abort?"
387 git rerere clear
388 git read-tree --reset -u HEAD HEAD
389 orig_head=$(cat "$GIT_DIR/ORIG_HEAD")
390 git reset HEAD
391 git update-ref ORIG_HEAD $orig_head
394 if test -f "$dotest/rebasing"
395 then
396 exec git rebase --abort
398 git rerere clear
399 test -f "$dotest/dirtyindex" || {
400 git read-tree --reset -u HEAD ORIG_HEAD
401 git reset ORIG_HEAD
403 rm -fr "$dotest"
404 exit ;;
405 esac
406 rm -f "$dotest/dirtyindex"
407 else
408 # Make sure we are not given --skip, --resolved, nor --abort
409 test "$skip$resolved$abort" = "" ||
410 die "Resolve operation not in progress, we are not resuming."
412 # Start afresh.
413 mkdir -p "$dotest" || exit
415 if test -n "$prefix" && test $# != 0
416 then
417 first=t
418 for arg
420 test -n "$first" && {
421 set x
422 first=
424 case "$arg" in
426 set "$@" "$arg" ;;
428 set "$@" "$prefix$arg" ;;
429 esac
430 done
431 shift
434 check_patch_format "$@"
436 split_patches "$@"
438 # -s, -u, -k, --whitespace, -3, -C, -q and -p flags are kept
439 # for the resuming session after a patch failure.
440 # -i can and must be given when resuming.
441 echo " $git_apply_opt" >"$dotest/apply-opt"
442 echo "$threeway" >"$dotest/threeway"
443 echo "$sign" >"$dotest/sign"
444 echo "$utf8" >"$dotest/utf8"
445 echo "$keep" >"$dotest/keep"
446 echo "$GIT_QUIET" >"$dotest/quiet"
447 echo 1 >"$dotest/next"
448 if test -n "$rebasing"
449 then
450 : >"$dotest/rebasing"
451 else
452 : >"$dotest/applying"
453 if test -n "$HAS_HEAD"
454 then
455 git update-ref ORIG_HEAD HEAD
456 else
457 git update-ref -d ORIG_HEAD >/dev/null 2>&1
462 case "$resolved" in
464 case "$HAS_HEAD" in
466 files=$(git ls-files) ;;
468 files=$(git diff-index --cached --name-only HEAD --) ;;
469 esac || exit
470 if test "$files"
471 then
472 test -n "$HAS_HEAD" && : >"$dotest/dirtyindex"
473 die "Dirty index: cannot apply patches (dirty: $files)"
475 esac
477 if test "$(cat "$dotest/utf8")" = t
478 then
479 utf8=-u
480 else
481 utf8=-n
483 if test "$(cat "$dotest/keep")" = t
484 then
485 keep=-k
487 if test "$(cat "$dotest/quiet")" = t
488 then
489 GIT_QUIET=t
491 if test "$(cat "$dotest/threeway")" = t
492 then
493 threeway=t
495 git_apply_opt=$(cat "$dotest/apply-opt")
496 if test "$(cat "$dotest/sign")" = t
497 then
498 SIGNOFF=`git var GIT_COMMITTER_IDENT | sed -e '
499 s/>.*/>/
500 s/^/Signed-off-by: /'
502 else
503 SIGNOFF=
506 last=`cat "$dotest/last"`
507 this=`cat "$dotest/next"`
508 if test "$skip" = t
509 then
510 this=`expr "$this" + 1`
511 resume=
514 if test "$this" -gt "$last"
515 then
516 say Nothing to do.
517 rm -fr "$dotest"
518 exit
521 while test "$this" -le "$last"
523 msgnum=`printf "%0${prec}d" $this`
524 next=`expr "$this" + 1`
525 test -f "$dotest/$msgnum" || {
526 resume=
527 go_next
528 continue
531 # If we are not resuming, parse and extract the patch information
532 # into separate files:
533 # - info records the authorship and title
534 # - msg is the rest of commit log message
535 # - patch is the patch body.
537 # When we are resuming, these files are either already prepared
538 # by the user, or the user can tell us to do so by --resolved flag.
539 case "$resume" in
541 git mailinfo $keep $utf8 "$dotest/msg" "$dotest/patch" \
542 <"$dotest/$msgnum" >"$dotest/info" ||
543 stop_here $this
545 # skip pine's internal folder data
546 grep '^Author: Mail System Internal Data$' \
547 <"$dotest"/info >/dev/null &&
548 go_next && continue
550 test -s "$dotest/patch" || {
551 echo "Patch is empty. Was it split wrong?"
552 stop_here $this
554 if test -f "$dotest/rebasing" &&
555 commit=$(sed -e 's/^From \([0-9a-f]*\) .*/\1/' \
556 -e q "$dotest/$msgnum") &&
557 test "$(git cat-file -t "$commit")" = commit
558 then
559 git cat-file commit "$commit" |
560 sed -e '1,/^$/d' >"$dotest/msg-clean"
561 else
562 SUBJECT="$(sed -n '/^Subject/ s/Subject: //p' "$dotest/info")"
563 case "$keep_subject" in -k) SUBJECT="[PATCH] $SUBJECT" ;; esac
565 (printf '%s\n\n' "$SUBJECT"; cat "$dotest/msg") |
566 git stripspace > "$dotest/msg-clean"
569 esac
571 GIT_AUTHOR_NAME="$(sed -n '/^Author/ s/Author: //p' "$dotest/info")"
572 GIT_AUTHOR_EMAIL="$(sed -n '/^Email/ s/Email: //p' "$dotest/info")"
573 GIT_AUTHOR_DATE="$(sed -n '/^Date/ s/Date: //p' "$dotest/info")"
575 if test -z "$GIT_AUTHOR_EMAIL"
576 then
577 echo "Patch does not have a valid e-mail address."
578 stop_here $this
581 export GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL GIT_AUTHOR_DATE
583 case "$resume" in
585 if test '' != "$SIGNOFF"
586 then
587 LAST_SIGNED_OFF_BY=`
588 sed -ne '/^Signed-off-by: /p' \
589 "$dotest/msg-clean" |
590 sed -ne '$p'
592 ADD_SIGNOFF=`
593 test "$LAST_SIGNED_OFF_BY" = "$SIGNOFF" || {
594 test '' = "$LAST_SIGNED_OFF_BY" && echo
595 echo "$SIGNOFF"
597 else
598 ADD_SIGNOFF=
601 if test -s "$dotest/msg-clean"
602 then
603 cat "$dotest/msg-clean"
605 if test '' != "$ADD_SIGNOFF"
606 then
607 echo "$ADD_SIGNOFF"
609 } >"$dotest/final-commit"
612 case "$resolved$interactive" in
614 # This is used only for interactive view option.
615 git diff-index -p --cached HEAD -- >"$dotest/patch"
617 esac
618 esac
620 resume=
621 if test "$interactive" = t
622 then
623 test -t 0 ||
624 die "cannot be interactive without stdin connected to a terminal."
625 action=again
626 while test "$action" = again
628 echo "Commit Body is:"
629 echo "--------------------------"
630 cat "$dotest/final-commit"
631 echo "--------------------------"
632 printf "Apply? [y]es/[n]o/[e]dit/[v]iew patch/[a]ccept all "
633 read reply
634 case "$reply" in
635 [yY]*) action=yes ;;
636 [aA]*) action=yes interactive= ;;
637 [nN]*) action=skip ;;
638 [eE]*) git_editor "$dotest/final-commit"
639 action=again ;;
640 [vV]*) action=again
641 LESS=-S ${PAGER:-less} "$dotest/patch" ;;
642 *) action=again ;;
643 esac
644 done
645 else
646 action=yes
648 FIRSTLINE=$(sed 1q "$dotest/final-commit")
650 if test $action = skip
651 then
652 go_next
653 continue
656 if test -x "$GIT_DIR"/hooks/applypatch-msg
657 then
658 "$GIT_DIR"/hooks/applypatch-msg "$dotest/final-commit" ||
659 stop_here $this
662 say "Applying: $FIRSTLINE"
664 case "$resolved" in
666 # When we are allowed to fall back to 3-way later, don't give
667 # false errors during the initial attempt.
668 squelch=
669 if test "$threeway" = t
670 then
671 squelch='>/dev/null 2>&1 '
673 eval "git apply $squelch$git_apply_opt"' --index "$dotest/patch"'
674 apply_status=$?
677 # Resolved means the user did all the hard work, and
678 # we do not have to do any patch application. Just
679 # trust what the user has in the index file and the
680 # working tree.
681 resolved=
682 git diff-index --quiet --cached HEAD -- && {
683 echo "No changes - did you forget to use 'git add'?"
684 stop_here_user_resolve $this
686 unmerged=$(git ls-files -u)
687 if test -n "$unmerged"
688 then
689 echo "You still have unmerged paths in your index"
690 echo "did you forget to use 'git add'?"
691 stop_here_user_resolve $this
693 apply_status=0
694 git rerere
696 esac
698 if test $apply_status = 1 && test "$threeway" = t
699 then
700 if (fall_back_3way)
701 then
702 # Applying the patch to an earlier tree and merging the
703 # result may have produced the same tree as ours.
704 git diff-index --quiet --cached HEAD -- && {
705 say No changes -- Patch already applied.
706 go_next
707 continue
709 # clear apply_status -- we have successfully merged.
710 apply_status=0
713 if test $apply_status != 0
714 then
715 printf 'Patch failed at %s %s\n' "$msgnum" "$FIRSTLINE"
716 stop_here_user_resolve $this
719 if test -x "$GIT_DIR"/hooks/pre-applypatch
720 then
721 "$GIT_DIR"/hooks/pre-applypatch || stop_here $this
724 tree=$(git write-tree) &&
725 commit=$(
726 if test -n "$ignore_date"
727 then
728 GIT_AUTHOR_DATE=
730 parent=$(git rev-parse --verify -q HEAD) ||
731 say >&2 "applying to an empty history"
733 if test -n "$committer_date_is_author_date"
734 then
735 GIT_COMMITTER_DATE="$GIT_AUTHOR_DATE"
736 export GIT_COMMITTER_DATE
737 fi &&
738 git commit-tree $tree ${parent:+-p} $parent <"$dotest/final-commit"
739 ) &&
740 git update-ref -m "$GIT_REFLOG_ACTION: $FIRSTLINE" HEAD $commit $parent ||
741 stop_here $this
743 if test -x "$GIT_DIR"/hooks/post-applypatch
744 then
745 "$GIT_DIR"/hooks/post-applypatch
748 go_next
749 done
751 git gc --auto
753 rm -fr "$dotest"