FIXME: hotpatch for compatibility with latest hg
[git] / git-am.sh
1 #!/bin/sh
2 #
3 # Copyright (c) 2005, 2006 Junio C Hamano
4
5 SUBDIRECTORY_OK=Yes
6 OPTIONS_KEEPDASHDASH=
7 OPTIONS_SPEC="\
8 git am [options] [(<mbox>|<Maildir>)...]
9 git am [options] (--resolved | --skip | --abort)
10 --
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 keep-cr         pass --keep-cr flag to git-mailsplit for mbox format
19 no-keep-cr      do not pass --keep-cr flag to git-mailsplit independent of am.keepcr
20 c,scissors      strip everything before a scissors line
21 whitespace=     pass it through git-apply
22 ignore-space-change pass it through git-apply
23 ignore-whitespace pass it through git-apply
24 directory=      pass it through git-apply
25 exclude=        pass it through git-apply
26 C=              pass it through git-apply
27 p=              pass it through git-apply
28 patch-format=   format the patch(es) are in
29 reject          pass it through git-apply
30 resolvemsg=     override error message when patch failure occurs
31 continue        continue applying patches after resolving a conflict
32 r,resolved      synonyms for --continue
33 skip            skip the current patch
34 abort           restore the original branch and abort the patching operation.
35 committer-date-is-author-date    lie about committer date
36 ignore-date     use current timestamp for author date
37 rerere-autoupdate update the index with reused conflict resolution if possible
38 rebasing*       (internal use for git-rebase)"
39
40 . git-sh-setup
41 . git-sh-i18n
42 prefix=$(git rev-parse --show-prefix)
43 set_reflog_action am
44 require_work_tree
45 cd_to_toplevel
46
47 git var GIT_COMMITTER_IDENT >/dev/null ||
48         die "$(gettext "You need to set your committer info first")"
49
50 if git rev-parse --verify -q HEAD >/dev/null
51 then
52         HAS_HEAD=yes
53 else
54         HAS_HEAD=
55 fi
56
57 cmdline="git am"
58 if test '' != "$interactive"
59 then
60         cmdline="$cmdline -i"
61 fi
62 if test '' != "$threeway"
63 then
64         cmdline="$cmdline -3"
65 fi
66
67 sq () {
68         git rev-parse --sq-quote "$@"
69 }
70
71 stop_here () {
72     echo "$1" >"$dotest/next"
73     git rev-parse --verify -q HEAD >"$dotest/abort-safety"
74     exit 1
75 }
76
77 safe_to_abort () {
78         if test -f "$dotest/dirtyindex"
79         then
80                 return 1
81         fi
82
83         if ! test -s "$dotest/abort-safety"
84         then
85                 return 0
86         fi
87
88         abort_safety=$(cat "$dotest/abort-safety")
89         if test "z$(git rev-parse --verify -q HEAD)" = "z$abort_safety"
90         then
91                 return 0
92         fi
93                 gettextln "You seem to have moved HEAD since the last 'am' failure.
94 Not rewinding to ORIG_HEAD" >&2
95         return 1
96 }
97
98 stop_here_user_resolve () {
99     if [ -n "$resolvemsg" ]; then
100             printf '%s\n' "$resolvemsg"
101             stop_here $1
102     fi
103     eval_gettextln "When you have resolved this problem run \"\$cmdline --resolved\".
104 If you would prefer to skip this patch, instead run \"\$cmdline --skip\".
105 To restore the original branch and stop patching run \"\$cmdline --abort\"."
106
107     stop_here $1
108 }
109
110 go_next () {
111         rm -f "$dotest/$msgnum" "$dotest/msg" "$dotest/msg-clean" \
112                 "$dotest/patch" "$dotest/info"
113         echo "$next" >"$dotest/next"
114         this=$next
115 }
116
117 cannot_fallback () {
118         echo "$1"
119         gettextln "Cannot fall back to three-way merge."
120         exit 1
121 }
122
123 fall_back_3way () {
124     O_OBJECT=`cd "$GIT_OBJECT_DIRECTORY" && pwd`
125
126     rm -fr "$dotest"/patch-merge-*
127     mkdir "$dotest/patch-merge-tmp-dir"
128
129     # First see if the patch records the index info that we can use.
130     git apply --build-fake-ancestor "$dotest/patch-merge-tmp-index" \
131         "$dotest/patch" &&
132     GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
133     git write-tree >"$dotest/patch-merge-base+" ||
134     cannot_fallback "$(gettext "Repository lacks necessary blobs to fall back on 3-way merge.")"
135
136     say Using index info to reconstruct a base tree...
137     if GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
138         git apply --cached <"$dotest/patch"
139     then
140         mv "$dotest/patch-merge-base+" "$dotest/patch-merge-base"
141         mv "$dotest/patch-merge-tmp-index" "$dotest/patch-merge-index"
142     else
143         cannot_fallback "$(gettext "Did you hand edit your patch?
144 It does not apply to blobs recorded in its index.")"
145     fi
146
147     test -f "$dotest/patch-merge-index" &&
148     his_tree=$(GIT_INDEX_FILE="$dotest/patch-merge-index" git write-tree) &&
149     orig_tree=$(cat "$dotest/patch-merge-base") &&
150     rm -fr "$dotest"/patch-merge-* || exit 1
151
152     say "$(gettext "Falling back to patching base and 3-way merge...")"
153
154     # This is not so wrong.  Depending on which base we picked,
155     # orig_tree may be wildly different from ours, but his_tree
156     # has the same set of wildly different changes in parts the
157     # patch did not touch, so recursive ends up canceling them,
158     # saying that we reverted all those changes.
159
160     eval GITHEAD_$his_tree='"$FIRSTLINE"'
161     export GITHEAD_$his_tree
162     if test -n "$GIT_QUIET"
163     then
164             GIT_MERGE_VERBOSITY=0 && export GIT_MERGE_VERBOSITY
165     fi
166     git-merge-recursive $orig_tree -- HEAD $his_tree || {
167             git rerere $allow_rerere_autoupdate
168             echo Failed to merge in the changes.
169             exit 1
170     }
171     unset GITHEAD_$his_tree
172 }
173
174 clean_abort () {
175         test $# = 0 || echo >&2 "$@"
176         rm -fr "$dotest"
177         exit 1
178 }
179
180 patch_format=
181
182 check_patch_format () {
183         # early return if patch_format was set from the command line
184         if test -n "$patch_format"
185         then
186                 return 0
187         fi
188
189         # we default to mbox format if input is from stdin and for
190         # directories
191         if test $# = 0 || test "x$1" = "x-" || test -d "$1"
192         then
193                 patch_format=mbox
194                 return 0
195         fi
196
197         # otherwise, check the first few non-blank lines of the first
198         # patch to try to detect its format
199         {
200                 # Start from first line containing non-whitespace
201                 l1=
202                 while test -z "$l1"
203                 do
204                         read l1
205                 done
206                 read l2
207                 read l3
208                 case "$l1" in
209                 "From "* | "From: "*)
210                         patch_format=mbox
211                         ;;
212                 '# This series applies on GIT commit'*)
213                         patch_format=stgit-series
214                         ;;
215                 "# HG changeset patch")
216                         patch_format=hg
217                         ;;
218                 *)
219                         # if the second line is empty and the third is
220                         # a From, Author or Date entry, this is very
221                         # likely an StGIT patch
222                         case "$l2,$l3" in
223                         ,"From: "* | ,"Author: "* | ,"Date: "*)
224                                 patch_format=stgit
225                                 ;;
226                         *)
227                                 ;;
228                         esac
229                         ;;
230                 esac
231                 if test -z "$patch_format" &&
232                         test -n "$l1" &&
233                         test -n "$l2" &&
234                         test -n "$l3"
235                 then
236                         # This begins with three non-empty lines.  Is this a
237                         # piece of e-mail a-la RFC2822?  Grab all the headers,
238                         # discarding the indented remainder of folded lines,
239                         # and see if it looks like that they all begin with the
240                         # header field names...
241                         tr -d '\015' <"$1" |
242                         sed -n -e '/^$/q' -e '/^[       ]/d' -e p |
243                         sane_egrep -v '^[!-9;-~]+:' >/dev/null ||
244                         patch_format=mbox
245                 fi
246         } < "$1" || clean_abort
247 }
248
249 split_patches () {
250         case "$patch_format" in
251         mbox)
252                 if test -n "$rebasing" || test t = "$keepcr"
253                 then
254                     keep_cr=--keep-cr
255                 else
256                     keep_cr=
257                 fi
258                 git mailsplit -d"$prec" -o"$dotest" -b $keep_cr -- "$@" > "$dotest/last" ||
259                 clean_abort
260                 ;;
261         stgit-series)
262                 if test $# -ne 1
263                 then
264                         clean_abort "$(gettext "Only one StGIT patch series can be applied at once")"
265                 fi
266                 series_dir=`dirname "$1"`
267                 series_file="$1"
268                 shift
269                 {
270                         set x
271                         while read filename
272                         do
273                                 set "$@" "$series_dir/$filename"
274                         done
275                         # remove the safety x
276                         shift
277                         # remove the arg coming from the first-line comment
278                         shift
279                 } < "$series_file" || clean_abort
280                 # set the patch format appropriately
281                 patch_format=stgit
282                 # now handle the actual StGIT patches
283                 split_patches "$@"
284                 ;;
285         stgit)
286                 this=0
287                 for stgit in "$@"
288                 do
289                         this=`expr "$this" + 1`
290                         msgnum=`printf "%0${prec}d" $this`
291                         # Perl version of StGIT parse_patch. The first nonemptyline
292                         # not starting with Author, From or Date is the
293                         # subject, and the body starts with the next nonempty
294                         # line not starting with Author, From or Date
295                         perl -ne 'BEGIN { $subject = 0 }
296                                 if ($subject > 1) { print ; }
297                                 elsif (/^\s+$/) { next ; }
298                                 elsif (/^Author:/) { print s/Author/From/ ; }
299                                 elsif (/^(From|Date)/) { print ; }
300                                 elsif ($subject) {
301                                         $subject = 2 ;
302                                         print "\n" ;
303                                         print ;
304                                 } else {
305                                         print "Subject: ", $_ ;
306                                         $subject = 1;
307                                 }
308                         ' < "$stgit" > "$dotest/$msgnum" || clean_abort
309                 done
310                 echo "$this" > "$dotest/last"
311                 this=
312                 msgnum=
313                 ;;
314         *)
315                 if test -n "$parse_patch" ; then
316                         clean_abort "$(eval_gettext "Patch format \$patch_format is not supported.")"
317                 else
318                         clean_abort "$(gettext "Patch format detection failed.")"
319                 fi
320                 ;;
321         esac
322 }
323
324 prec=4
325 dotest="$GIT_DIR/rebase-apply"
326 sign= utf8=t keep= keepcr= skip= interactive= resolved= rebasing= abort=
327 resolvemsg= resume= scissors= no_inbody_headers=
328 git_apply_opt=
329 committer_date_is_author_date=
330 ignore_date=
331 allow_rerere_autoupdate=
332
333 if test "$(git config --bool --get am.keepcr)" = true
334 then
335     keepcr=t
336 fi
337
338 while test $# != 0
339 do
340         case "$1" in
341         -i|--interactive)
342                 interactive=t ;;
343         -b|--binary)
344                 : ;;
345         -3|--3way)
346                 threeway=t ;;
347         -s|--signoff)
348                 sign=t ;;
349         -u|--utf8)
350                 utf8=t ;; # this is now default
351         --no-utf8)
352                 utf8= ;;
353         -k|--keep)
354                 keep=t ;;
355         -c|--scissors)
356                 scissors=t ;;
357         --no-scissors)
358                 scissors=f ;;
359         -r|--resolved|--continue)
360                 resolved=t ;;
361         --skip)
362                 skip=t ;;
363         --abort)
364                 abort=t ;;
365         --rebasing)
366                 rebasing=t threeway=t keep=t scissors=f no_inbody_headers=t ;;
367         -d|--dotest)
368                 die "$(gettext "-d option is no longer supported.  Do not use.")"
369                 ;;
370         --resolvemsg)
371                 shift; resolvemsg=$1 ;;
372         --whitespace|--directory|--exclude)
373                 git_apply_opt="$git_apply_opt $(sq "$1=$2")"; shift ;;
374         -C|-p)
375                 git_apply_opt="$git_apply_opt $(sq "$1$2")"; shift ;;
376         --patch-format)
377                 shift ; patch_format="$1" ;;
378         --reject|--ignore-whitespace|--ignore-space-change)
379                 git_apply_opt="$git_apply_opt $1" ;;
380         --committer-date-is-author-date)
381                 committer_date_is_author_date=t ;;
382         --ignore-date)
383                 ignore_date=t ;;
384         --rerere-autoupdate|--no-rerere-autoupdate)
385                 allow_rerere_autoupdate="$1" ;;
386         -q|--quiet)
387                 GIT_QUIET=t ;;
388         --keep-cr)
389                 keepcr=t ;;
390         --no-keep-cr)
391                 keepcr=f ;;
392         --)
393                 shift; break ;;
394         *)
395                 usage ;;
396         esac
397         shift
398 done
399
400 # If the dotest directory exists, but we have finished applying all the
401 # patches in them, clear it out.
402 if test -d "$dotest" &&
403    last=$(cat "$dotest/last") &&
404    next=$(cat "$dotest/next") &&
405    test $# != 0 &&
406    test "$next" -gt "$last"
407 then
408    rm -fr "$dotest"
409 fi
410
411 if test -d "$dotest"
412 then
413         case "$#,$skip$resolved$abort" in
414         0,*t*)
415                 # Explicit resume command and we do not have file, so
416                 # we are happy.
417                 : ;;
418         0,)
419                 # No file input but without resume parameters; catch
420                 # user error to feed us a patch from standard input
421                 # when there is already $dotest.  This is somewhat
422                 # unreliable -- stdin could be /dev/null for example
423                 # and the caller did not intend to feed us a patch but
424                 # wanted to continue unattended.
425                 test -t 0
426                 ;;
427         *)
428                 false
429                 ;;
430         esac ||
431         die "$(eval_gettext "previous rebase directory \$dotest still exists but mbox given.")"
432         resume=yes
433
434         case "$skip,$abort" in
435         t,t)
436                 die "$(gettext "Please make up your mind. --skip or --abort?")"
437                 ;;
438         t,)
439                 git rerere clear
440                 git read-tree --reset -u HEAD HEAD
441                 orig_head=$(cat "$GIT_DIR/ORIG_HEAD")
442                 git reset HEAD
443                 git update-ref ORIG_HEAD $orig_head
444                 ;;
445         ,t)
446                 if test -f "$dotest/rebasing"
447                 then
448                         exec git rebase --abort
449                 fi
450                 git rerere clear
451                 if safe_to_abort
452                 then
453                         git read-tree --reset -u HEAD ORIG_HEAD
454                         git reset ORIG_HEAD
455                 fi
456                 rm -fr "$dotest"
457                 exit ;;
458         esac
459         rm -f "$dotest/dirtyindex"
460 else
461         # Make sure we are not given --skip, --resolved, nor --abort
462         test "$skip$resolved$abort" = "" ||
463                 die "$(gettext "Resolve operation not in progress, we are not resuming.")"
464
465         # Start afresh.
466         mkdir -p "$dotest" || exit
467
468         if test -n "$prefix" && test $# != 0
469         then
470                 first=t
471                 for arg
472                 do
473                         test -n "$first" && {
474                                 set x
475                                 first=
476                         }
477                         if is_absolute_path "$arg"
478                         then
479                                 set "$@" "$arg"
480                         else
481                                 set "$@" "$prefix$arg"
482                         fi
483                 done
484                 shift
485         fi
486
487         check_patch_format "$@"
488
489         split_patches "$@"
490
491         # -i can and must be given when resuming; everything
492         # else is kept
493         echo " $git_apply_opt" >"$dotest/apply-opt"
494         echo "$threeway" >"$dotest/threeway"
495         echo "$sign" >"$dotest/sign"
496         echo "$utf8" >"$dotest/utf8"
497         echo "$keep" >"$dotest/keep"
498         echo "$keepcr" >"$dotest/keepcr"
499         echo "$scissors" >"$dotest/scissors"
500         echo "$no_inbody_headers" >"$dotest/no_inbody_headers"
501         echo "$GIT_QUIET" >"$dotest/quiet"
502         echo 1 >"$dotest/next"
503         if test -n "$rebasing"
504         then
505                 : >"$dotest/rebasing"
506         else
507                 : >"$dotest/applying"
508                 if test -n "$HAS_HEAD"
509                 then
510                         git update-ref ORIG_HEAD HEAD
511                 else
512                         git update-ref -d ORIG_HEAD >/dev/null 2>&1
513                 fi
514         fi
515 fi
516
517 git update-index -q --refresh
518
519 case "$resolved" in
520 '')
521         case "$HAS_HEAD" in
522         '')
523                 files=$(git ls-files) ;;
524         ?*)
525                 files=$(git diff-index --cached --name-only HEAD --) ;;
526         esac || exit
527         if test "$files"
528         then
529                 test -n "$HAS_HEAD" && : >"$dotest/dirtyindex"
530                 die "$(eval_gettext "Dirty index: cannot apply patches (dirty: \$files)")"
531         fi
532 esac
533
534 if test "$(cat "$dotest/utf8")" = t
535 then
536         utf8=-u
537 else
538         utf8=-n
539 fi
540 if test "$(cat "$dotest/keep")" = t
541 then
542         keep=-k
543 fi
544 case "$(cat "$dotest/keepcr")" in
545 t)
546         keepcr=--keep-cr ;;
547 f)
548         keepcr=--no-keep-cr ;;
549 esac
550 case "$(cat "$dotest/scissors")" in
551 t)
552         scissors=--scissors ;;
553 f)
554         scissors=--no-scissors ;;
555 esac
556 if test "$(cat "$dotest/no_inbody_headers")" = t
557 then
558         no_inbody_headers=--no-inbody-headers
559 else
560         no_inbody_headers=
561 fi
562 if test "$(cat "$dotest/quiet")" = t
563 then
564         GIT_QUIET=t
565 fi
566 if test "$(cat "$dotest/threeway")" = t
567 then
568         threeway=t
569 fi
570 git_apply_opt=$(cat "$dotest/apply-opt")
571 if test "$(cat "$dotest/sign")" = t
572 then
573         SIGNOFF=`git var GIT_COMMITTER_IDENT | sed -e '
574                         s/>.*/>/
575                         s/^/Signed-off-by: /'
576                 `
577 else
578         SIGNOFF=
579 fi
580
581 last=`cat "$dotest/last"`
582 this=`cat "$dotest/next"`
583 if test "$skip" = t
584 then
585         this=`expr "$this" + 1`
586         resume=
587 fi
588
589 while test "$this" -le "$last"
590 do
591         msgnum=`printf "%0${prec}d" $this`
592         next=`expr "$this" + 1`
593         test -f "$dotest/$msgnum" || {
594                 resume=
595                 go_next
596                 continue
597         }
598
599         # If we are not resuming, parse and extract the patch information
600         # into separate files:
601         #  - info records the authorship and title
602         #  - msg is the rest of commit log message
603         #  - patch is the patch body.
604         #
605         # When we are resuming, these files are either already prepared
606         # by the user, or the user can tell us to do so by --resolved flag.
607         case "$resume" in
608         '')
609                 git mailinfo $keep $no_inbody_headers $scissors $utf8 "$dotest/msg" "$dotest/patch" \
610                         <"$dotest/$msgnum" >"$dotest/info" ||
611                         stop_here $this
612
613                 # skip pine's internal folder data
614                 sane_grep '^Author: Mail System Internal Data$' \
615                         <"$dotest"/info >/dev/null &&
616                         go_next && continue
617
618                 test -s "$dotest/patch" || {
619                         eval_gettextln "Patch is empty.  Was it split wrong?
620 If you would prefer to skip this patch, instead run \"\$cmdline --skip\".
621 To restore the original branch and stop patching run \"\$cmdline --abort\"."
622                         stop_here $this
623                 }
624                 rm -f "$dotest/original-commit" "$dotest/author-script"
625                 if test -f "$dotest/rebasing" &&
626                         commit=$(sed -e 's/^From \([0-9a-f]*\) .*/\1/' \
627                                 -e q "$dotest/$msgnum") &&
628                         test "$(git cat-file -t "$commit")" = commit
629                 then
630                         git cat-file commit "$commit" |
631                         sed -e '1,/^$/d' >"$dotest/msg-clean"
632                         echo "$commit" > "$dotest/original-commit"
633                         get_author_ident_from_commit "$commit" > "$dotest/author-script"
634                 else
635                         {
636                                 sed -n '/^Subject/ s/Subject: //p' "$dotest/info"
637                                 echo
638                                 cat "$dotest/msg"
639                         } |
640                         git stripspace > "$dotest/msg-clean"
641                 fi
642                 ;;
643         esac
644
645         if test -f "$dotest/author-script"
646         then
647                 eval $(cat "$dotest/author-script")
648         else
649                 GIT_AUTHOR_NAME="$(sed -n '/^Author/ s/Author: //p' "$dotest/info")"
650                 GIT_AUTHOR_EMAIL="$(sed -n '/^Email/ s/Email: //p' "$dotest/info")"
651                 GIT_AUTHOR_DATE="$(sed -n '/^Date/ s/Date: //p' "$dotest/info")"
652         fi
653
654         if test -z "$GIT_AUTHOR_EMAIL"
655         then
656                 gettextln "Patch does not have a valid e-mail address."
657                 stop_here $this
658         fi
659
660         export GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL GIT_AUTHOR_DATE
661
662         case "$resume" in
663         '')
664             if test '' != "$SIGNOFF"
665             then
666                 LAST_SIGNED_OFF_BY=`
667                     sed -ne '/^Signed-off-by: /p' \
668                     "$dotest/msg-clean" |
669                     sed -ne '$p'
670                 `
671                 ADD_SIGNOFF=`
672                     test "$LAST_SIGNED_OFF_BY" = "$SIGNOFF" || {
673                     test '' = "$LAST_SIGNED_OFF_BY" && echo
674                     echo "$SIGNOFF"
675                 }`
676             else
677                 ADD_SIGNOFF=
678             fi
679             {
680                 if test -s "$dotest/msg-clean"
681                 then
682                         cat "$dotest/msg-clean"
683                 fi
684                 if test '' != "$ADD_SIGNOFF"
685                 then
686                         echo "$ADD_SIGNOFF"
687                 fi
688             } >"$dotest/final-commit"
689             ;;
690         *)
691                 case "$resolved$interactive" in
692                 tt)
693                         # This is used only for interactive view option.
694                         git diff-index -p --cached HEAD -- >"$dotest/patch"
695                         ;;
696                 esac
697         esac
698
699         resume=
700         if test "$interactive" = t
701         then
702             test -t 0 ||
703             die "$(gettext "cannot be interactive without stdin connected to a terminal.")"
704             action=again
705             while test "$action" = again
706             do
707                 gettextln "Commit Body is:"
708                 echo "--------------------------"
709                 cat "$dotest/final-commit"
710                 echo "--------------------------"
711                 # TRANSLATORS: Make sure to include [y], [n], [e], [v] and [a]
712                 # in your translation. The program will only accept English
713                 # input at this point.
714                 gettext "Apply? [y]es/[n]o/[e]dit/[v]iew patch/[a]ccept all "
715                 read reply
716                 case "$reply" in
717                 [yY]*) action=yes ;;
718                 [aA]*) action=yes interactive= ;;
719                 [nN]*) action=skip ;;
720                 [eE]*) git_editor "$dotest/final-commit"
721                        action=again ;;
722                 [vV]*) action=again
723                        git_pager "$dotest/patch" ;;
724                 *)     action=again ;;
725                 esac
726             done
727         else
728             action=yes
729         fi
730
731         if test -f "$dotest/final-commit"
732         then
733                 FIRSTLINE=$(sed 1q "$dotest/final-commit")
734         else
735                 FIRSTLINE=""
736         fi
737
738         if test $action = skip
739         then
740                 go_next
741                 continue
742         fi
743
744         if test -x "$GIT_DIR"/hooks/applypatch-msg
745         then
746                 "$GIT_DIR"/hooks/applypatch-msg "$dotest/final-commit" ||
747                 stop_here $this
748         fi
749
750         say "$(eval_gettext "Applying: \$FIRSTLINE")"
751
752         case "$resolved" in
753         '')
754                 # When we are allowed to fall back to 3-way later, don't give
755                 # false errors during the initial attempt.
756                 squelch=
757                 if test "$threeway" = t
758                 then
759                         squelch='>/dev/null 2>&1 '
760                 fi
761                 eval "git apply $squelch$git_apply_opt"' --index "$dotest/patch"'
762                 apply_status=$?
763                 ;;
764         t)
765                 # Resolved means the user did all the hard work, and
766                 # we do not have to do any patch application.  Just
767                 # trust what the user has in the index file and the
768                 # working tree.
769                 resolved=
770                 git diff-index --quiet --cached HEAD -- && {
771                         gettextln "No changes - did you forget to use 'git add'?
772 If there is nothing left to stage, chances are that something else
773 already introduced the same changes; you might want to skip this patch."
774                         stop_here_user_resolve $this
775                 }
776                 unmerged=$(git ls-files -u)
777                 if test -n "$unmerged"
778                 then
779                         gettextln "You still have unmerged paths in your index
780 did you forget to use 'git add'?"
781                         stop_here_user_resolve $this
782                 fi
783                 apply_status=0
784                 git rerere
785                 ;;
786         esac
787
788         if test $apply_status != 0 && test "$threeway" = t
789         then
790                 if (fall_back_3way)
791                 then
792                     # Applying the patch to an earlier tree and merging the
793                     # result may have produced the same tree as ours.
794                     git diff-index --quiet --cached HEAD -- && {
795                         say "$(gettext "No changes -- Patch already applied.")"
796                         go_next
797                         continue
798                     }
799                     # clear apply_status -- we have successfully merged.
800                     apply_status=0
801                 fi
802         fi
803         if test $apply_status != 0
804         then
805                 eval_gettextln 'Patch failed at $msgnum $FIRSTLINE'
806                 stop_here_user_resolve $this
807         fi
808
809         if test -x "$GIT_DIR"/hooks/pre-applypatch
810         then
811                 "$GIT_DIR"/hooks/pre-applypatch || stop_here $this
812         fi
813
814         tree=$(git write-tree) &&
815         commit=$(
816                 if test -n "$ignore_date"
817                 then
818                         GIT_AUTHOR_DATE=
819                 fi
820                 parent=$(git rev-parse --verify -q HEAD) ||
821                 say >&2 "$(gettext "applying to an empty history")"
822
823                 if test -n "$committer_date_is_author_date"
824                 then
825                         GIT_COMMITTER_DATE="$GIT_AUTHOR_DATE"
826                         export GIT_COMMITTER_DATE
827                 fi &&
828                 git commit-tree $tree ${parent:+-p} $parent <"$dotest/final-commit"
829         ) &&
830         git update-ref -m "$GIT_REFLOG_ACTION: $FIRSTLINE" HEAD $commit $parent ||
831         stop_here $this
832
833         if test -f "$dotest/original-commit"; then
834                 echo "$(cat "$dotest/original-commit") $commit" >> "$dotest/rewritten"
835         fi
836
837         if test -x "$GIT_DIR"/hooks/post-applypatch
838         then
839                 "$GIT_DIR"/hooks/post-applypatch
840         fi
841
842         go_next
843 done
844
845 if test -s "$dotest"/rewritten; then
846     git notes copy --for-rewrite=rebase < "$dotest"/rewritten
847     if test -x "$GIT_DIR"/hooks/post-rewrite; then
848         "$GIT_DIR"/hooks/post-rewrite rebase < "$dotest"/rewritten
849     fi
850 fi
851
852 rm -fr "$dotest"
853 git gc --auto