Merge branch 'js/grep-mutex'
[git] / git-submodule.sh
1 #!/bin/sh
2 #
3 # git-submodules.sh: add, init, update or list git submodules
4 #
5 # Copyright (c) 2007 Lars Hjemli
6
7 dashless=$(basename "$0" | sed -e 's/-/ /')
8 USAGE="[--quiet] add [-b branch] [-f|--force] [--reference <repository>] [--] <repository> [<path>]
9    or: $dashless [--quiet] status [--cached] [--recursive] [--] [<path>...]
10    or: $dashless [--quiet] init [--] [<path>...]
11    or: $dashless [--quiet] update [--init] [-N|--no-fetch] [-f|--force] [--rebase] [--reference <repository>] [--merge] [--recursive] [--] [<path>...]
12    or: $dashless [--quiet] summary [--cached|--files] [--summary-limit <n>] [commit] [--] [<path>...]
13    or: $dashless [--quiet] foreach [--recursive] <command>
14    or: $dashless [--quiet] sync [--] [<path>...]"
15 OPTIONS_SPEC=
16 . git-sh-setup
17 . git-sh-i18n
18 . git-parse-remote
19 require_work_tree
20
21 command=
22 branch=
23 force=
24 reference=
25 cached=
26 recursive=
27 init=
28 files=
29 nofetch=
30 update=
31 prefix=
32
33 # Resolve relative url by appending to parent's url
34 resolve_relative_url ()
35 {
36         remote=$(get_default_remote)
37         remoteurl=$(git config "remote.$remote.url") ||
38                 remoteurl=$(pwd) # the repository is its own authoritative upstream
39         url="$1"
40         remoteurl=${remoteurl%/}
41         sep=/
42         while test -n "$url"
43         do
44                 case "$url" in
45                 ../*)
46                         url="${url#../}"
47                         case "$remoteurl" in
48                         */*)
49                                 remoteurl="${remoteurl%/*}"
50                                 ;;
51                         *:*)
52                                 remoteurl="${remoteurl%:*}"
53                                 sep=:
54                                 ;;
55                         *)
56                                 die "$(eval_gettext "cannot strip one component off url '\$remoteurl'")"
57                                 ;;
58                         esac
59                         ;;
60                 ./*)
61                         url="${url#./}"
62                         ;;
63                 *)
64                         break;;
65                 esac
66         done
67         echo "$remoteurl$sep${url%/}"
68 }
69
70 #
71 # Get submodule info for registered submodules
72 # $@ = path to limit submodule list
73 #
74 module_list()
75 {
76         git ls-files --error-unmatch --stage -- "$@" |
77         perl -e '
78         my %unmerged = ();
79         my ($null_sha1) = ("0" x 40);
80         while (<STDIN>) {
81                 chomp;
82                 my ($mode, $sha1, $stage, $path) =
83                         /^([0-7]+) ([0-9a-f]{40}) ([0-3])\t(.*)$/;
84                 next unless $mode eq "160000";
85                 if ($stage ne "0") {
86                         if (!$unmerged{$path}++) {
87                                 print "$mode $null_sha1 U\t$path\n";
88                         }
89                         next;
90                 }
91                 print "$_\n";
92         }
93         '
94 }
95
96 #
97 # Map submodule path to submodule name
98 #
99 # $1 = path
100 #
101 module_name()
102 {
103         # Do we have "submodule.<something>.path = $1" defined in .gitmodules file?
104         re=$(printf '%s\n' "$1" | sed -e 's/[].[^$\\*]/\\&/g')
105         name=$( git config -f .gitmodules --get-regexp '^submodule\..*\.path$' |
106                 sed -n -e 's|^submodule\.\(.*\)\.path '"$re"'$|\1|p' )
107         test -z "$name" &&
108         die "$(eval_gettext "No submodule mapping found in .gitmodules for path '\$path'")"
109         echo "$name"
110 }
111
112 #
113 # Clone a submodule
114 #
115 # Prior to calling, cmd_update checks that a possibly existing
116 # path is not a git repository.
117 # Likewise, cmd_add checks that path does not exist at all,
118 # since it is the location of a new submodule.
119 #
120 module_clone()
121 {
122         path=$1
123         url=$2
124         reference="$3"
125         quiet=
126         if test -n "$GIT_QUIET"
127         then
128                 quiet=-q
129         fi
130
131         gitdir=
132         gitdir_base=
133         name=$(module_name "$path" 2>/dev/null)
134         base_path=$(dirname "$path")
135
136         gitdir=$(git rev-parse --git-dir)
137         gitdir_base="$gitdir/modules/$base_path"
138         gitdir="$gitdir/modules/$path"
139
140         case $gitdir in
141         /*)
142                 a="$(cd_to_toplevel && pwd)/"
143                 b=$gitdir
144                 while [ "$b" ] && [ "${a%%/*}" = "${b%%/*}" ]
145                 do
146                         a=${a#*/} b=${b#*/};
147                 done
148
149                 rel="$a$name"
150                 rel=`echo $rel | sed -e 's|[^/]*|..|g'`
151                 rel_gitdir="$rel/$b"
152                 ;;
153         *)
154                 rel=`echo $name | sed -e 's|[^/]*|..|g'`
155                 rel_gitdir="$rel/$gitdir"
156                 ;;
157         esac
158
159         if test -d "$gitdir"
160         then
161                 mkdir -p "$path"
162                 echo "gitdir: $rel_gitdir" >"$path/.git"
163                 rm -f "$gitdir/index"
164         else
165                 mkdir -p "$gitdir_base"
166                 if test -n "$reference"
167                 then
168                         git-clone $quiet "$reference" -n "$url" "$path" --separate-git-dir "$gitdir"
169                 else
170                         git-clone $quiet -n "$url" "$path" --separate-git-dir "$gitdir"
171                 fi ||
172                 die "$(eval_gettext "Clone of '\$url' into submodule path '\$path' failed")"
173         fi
174 }
175
176 #
177 # Add a new submodule to the working tree, .gitmodules and the index
178 #
179 # $@ = repo path
180 #
181 # optional branch is stored in global branch variable
182 #
183 cmd_add()
184 {
185         # parse $args after "submodule ... add".
186         while test $# -ne 0
187         do
188                 case "$1" in
189                 -b | --branch)
190                         case "$2" in '') usage ;; esac
191                         branch=$2
192                         shift
193                         ;;
194                 -f | --force)
195                         force=$1
196                         ;;
197                 -q|--quiet)
198                         GIT_QUIET=1
199                         ;;
200                 --reference)
201                         case "$2" in '') usage ;; esac
202                         reference="--reference=$2"
203                         shift
204                         ;;
205                 --reference=*)
206                         reference="$1"
207                         shift
208                         ;;
209                 --)
210                         shift
211                         break
212                         ;;
213                 -*)
214                         usage
215                         ;;
216                 *)
217                         break
218                         ;;
219                 esac
220                 shift
221         done
222
223         repo=$1
224         path=$2
225
226         if test -z "$path"; then
227                 path=$(echo "$repo" |
228                         sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
229         fi
230
231         if test -z "$repo" -o -z "$path"; then
232                 usage
233         fi
234
235         # assure repo is absolute or relative to parent
236         case "$repo" in
237         ./*|../*)
238                 # dereference source url relative to parent's url
239                 realrepo=$(resolve_relative_url "$repo") || exit
240                 ;;
241         *:*|/*)
242                 # absolute url
243                 realrepo=$repo
244                 ;;
245         *)
246                 die "$(eval_gettext "repo URL: '\$repo' must be absolute or begin with ./|../")"
247         ;;
248         esac
249
250         # normalize path:
251         # multiple //; leading ./; /./; /../; trailing /
252         path=$(printf '%s/\n' "$path" |
253                 sed -e '
254                         s|//*|/|g
255                         s|^\(\./\)*||
256                         s|/\./|/|g
257                         :start
258                         s|\([^/]*\)/\.\./||
259                         tstart
260                         s|/*$||
261                 ')
262         git ls-files --error-unmatch "$path" > /dev/null 2>&1 &&
263         die "$(eval_gettext "'\$path' already exists in the index")"
264
265         if test -z "$force" && ! git add --dry-run --ignore-missing "$path" > /dev/null 2>&1
266         then
267                 eval_gettextln "The following path is ignored by one of your .gitignore files:
268 \$path
269 Use -f if you really want to add it." >&2
270                 exit 1
271         fi
272
273         # perhaps the path exists and is already a git repo, else clone it
274         if test -e "$path"
275         then
276                 if test -d "$path"/.git -o -f "$path"/.git
277                 then
278                         eval_gettextln "Adding existing repo at '\$path' to the index"
279                 else
280                         die "$(eval_gettext "'\$path' already exists and is not a valid git repo")"
281                 fi
282
283         else
284
285                 module_clone "$path" "$realrepo" "$reference" || exit
286                 (
287                         clear_local_git_env
288                         cd "$path" &&
289                         # ash fails to wordsplit ${branch:+-b "$branch"...}
290                         case "$branch" in
291                         '') git checkout -f -q ;;
292                         ?*) git checkout -f -q -B "$branch" "origin/$branch" ;;
293                         esac
294                 ) || die "$(eval_gettext "Unable to checkout submodule '\$path'")"
295         fi
296         git config submodule."$path".url "$realrepo"
297
298         git add $force "$path" ||
299         die "$(eval_gettext "Failed to add submodule '\$path'")"
300
301         git config -f .gitmodules submodule."$path".path "$path" &&
302         git config -f .gitmodules submodule."$path".url "$repo" &&
303         git add --force .gitmodules ||
304         die "$(eval_gettext "Failed to register submodule '\$path'")"
305 }
306
307 #
308 # Execute an arbitrary command sequence in each checked out
309 # submodule
310 #
311 # $@ = command to execute
312 #
313 cmd_foreach()
314 {
315         # parse $args after "submodule ... foreach".
316         while test $# -ne 0
317         do
318                 case "$1" in
319                 -q|--quiet)
320                         GIT_QUIET=1
321                         ;;
322                 --recursive)
323                         recursive=1
324                         ;;
325                 -*)
326                         usage
327                         ;;
328                 *)
329                         break
330                         ;;
331                 esac
332                 shift
333         done
334
335         toplevel=$(pwd)
336
337         # dup stdin so that it can be restored when running the external
338         # command in the subshell (and a recursive call to this function)
339         exec 3<&0
340
341         module_list |
342         while read mode sha1 stage path
343         do
344                 if test -e "$path"/.git
345                 then
346                         say "$(eval_gettext "Entering '\$prefix\$path'")"
347                         name=$(module_name "$path")
348                         (
349                                 prefix="$prefix$path/"
350                                 clear_local_git_env
351                                 cd "$path" &&
352                                 eval "$@" &&
353                                 if test -n "$recursive"
354                                 then
355                                         cmd_foreach "--recursive" "$@"
356                                 fi
357                         ) <&3 3<&- ||
358                         die "$(eval_gettext "Stopping at '\$path'; script returned non-zero status.")"
359                 fi
360         done
361 }
362
363 #
364 # Register submodules in .git/config
365 #
366 # $@ = requested paths (default to all)
367 #
368 cmd_init()
369 {
370         # parse $args after "submodule ... init".
371         while test $# -ne 0
372         do
373                 case "$1" in
374                 -q|--quiet)
375                         GIT_QUIET=1
376                         ;;
377                 --)
378                         shift
379                         break
380                         ;;
381                 -*)
382                         usage
383                         ;;
384                 *)
385                         break
386                         ;;
387                 esac
388                 shift
389         done
390
391         module_list "$@" |
392         while read mode sha1 stage path
393         do
394                 # Skip already registered paths
395                 name=$(module_name "$path") || exit
396                 if test -z "$(git config "submodule.$name.url")"
397                 then
398                         url=$(git config -f .gitmodules submodule."$name".url)
399                         test -z "$url" &&
400                         die "$(eval_gettext "No url found for submodule path '\$path' in .gitmodules")"
401
402                         # Possibly a url relative to parent
403                         case "$url" in
404                         ./*|../*)
405                                 url=$(resolve_relative_url "$url") || exit
406                                 ;;
407                         esac
408                         git config submodule."$name".url "$url" ||
409                         die "$(eval_gettext "Failed to register url for submodule path '\$path'")"
410                 fi
411
412                 # Copy "update" setting when it is not set yet
413                 upd="$(git config -f .gitmodules submodule."$name".update)"
414                 test -z "$upd" ||
415                 test -n "$(git config submodule."$name".update)" ||
416                 git config submodule."$name".update "$upd" ||
417                 die "$(eval_gettext "Failed to register update mode for submodule path '\$path'")"
418
419                 say "$(eval_gettext "Submodule '\$name' (\$url) registered for path '\$path'")"
420         done
421 }
422
423 #
424 # Update each submodule path to correct revision, using clone and checkout as needed
425 #
426 # $@ = requested paths (default to all)
427 #
428 cmd_update()
429 {
430         # parse $args after "submodule ... update".
431         orig_flags=
432         while test $# -ne 0
433         do
434                 case "$1" in
435                 -q|--quiet)
436                         GIT_QUIET=1
437                         ;;
438                 -i|--init)
439                         init=1
440                         ;;
441                 -N|--no-fetch)
442                         nofetch=1
443                         ;;
444                 -f|--force)
445                         force=$1
446                         ;;
447                 -r|--rebase)
448                         update="rebase"
449                         ;;
450                 --reference)
451                         case "$2" in '') usage ;; esac
452                         reference="--reference=$2"
453                         orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
454                         shift
455                         ;;
456                 --reference=*)
457                         reference="$1"
458                         ;;
459                 -m|--merge)
460                         update="merge"
461                         ;;
462                 --recursive)
463                         recursive=1
464                         ;;
465                 --checkout)
466                         update="checkout"
467                         ;;
468                 --)
469                         shift
470                         break
471                         ;;
472                 -*)
473                         usage
474                         ;;
475                 *)
476                         break
477                         ;;
478                 esac
479                 orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
480                 shift
481         done
482
483         if test -n "$init"
484         then
485                 cmd_init "--" "$@" || return
486         fi
487
488         cloned_modules=
489         module_list "$@" | {
490         err=
491         while read mode sha1 stage path
492         do
493                 if test "$stage" = U
494                 then
495                         echo >&2 "Skipping unmerged submodule $path"
496                         continue
497                 fi
498                 name=$(module_name "$path") || exit
499                 url=$(git config submodule."$name".url)
500                 if ! test -z "$update"
501                 then
502                         update_module=$update
503                 else
504                         update_module=$(git config submodule."$name".update)
505                 fi
506
507                 if test "$update_module" = "none"
508                 then
509                         echo "Skipping submodule '$path'"
510                         continue
511                 fi
512
513                 if test -z "$url"
514                 then
515                         # Only mention uninitialized submodules when its
516                         # path have been specified
517                         test "$#" != "0" &&
518                         say "$(eval_gettext "Submodule path '\$path' not initialized
519 Maybe you want to use 'update --init'?")"
520                         continue
521                 fi
522
523                 if ! test -d "$path"/.git -o -f "$path"/.git
524                 then
525                         module_clone "$path" "$url" "$reference"|| exit
526                         cloned_modules="$cloned_modules;$name"
527                         subsha1=
528                 else
529                         subsha1=$(clear_local_git_env; cd "$path" &&
530                                 git rev-parse --verify HEAD) ||
531                         die "$(eval_gettext "Unable to find current revision in submodule path '\$path'")"
532                 fi
533
534                 if test "$subsha1" != "$sha1"
535                 then
536                         subforce=$force
537                         # If we don't already have a -f flag and the submodule has never been checked out
538                         if test -z "$subsha1" -a -z "$force"
539                         then
540                                 subforce="-f"
541                         fi
542
543                         if test -z "$nofetch"
544                         then
545                                 # Run fetch only if $sha1 isn't present or it
546                                 # is not reachable from a ref.
547                                 (clear_local_git_env; cd "$path" &&
548                                         ( (rev=$(git rev-list -n 1 $sha1 --not --all 2>/dev/null) &&
549                                          test -z "$rev") || git-fetch)) ||
550                                 die "$(eval_gettext "Unable to fetch in submodule path '\$path'")"
551                         fi
552
553                         # Is this something we just cloned?
554                         case ";$cloned_modules;" in
555                         *";$name;"*)
556                                 # then there is no local change to integrate
557                                 update_module= ;;
558                         esac
559
560                         must_die_on_failure=
561                         case "$update_module" in
562                         rebase)
563                                 command="git rebase"
564                                 die_msg="$(eval_gettext "Unable to rebase '\$sha1' in submodule path '\$path'")"
565                                 say_msg="$(eval_gettext "Submodule path '\$path': rebased into '\$sha1'")"
566                                 must_die_on_failure=yes
567                                 ;;
568                         merge)
569                                 command="git merge"
570                                 die_msg="$(eval_gettext "Unable to merge '\$sha1' in submodule path '\$path'")"
571                                 say_msg="$(eval_gettext "Submodule path '\$path': merged in '\$sha1'")"
572                                 must_die_on_failure=yes
573                                 ;;
574                         *)
575                                 command="git checkout $subforce -q"
576                                 die_msg="$(eval_gettext "Unable to checkout '\$sha1' in submodule path '\$path'")"
577                                 say_msg="$(eval_gettext "Submodule path '\$path': checked out '\$sha1'")"
578                                 ;;
579                         esac
580
581                         if (clear_local_git_env; cd "$path" && $command "$sha1")
582                         then
583                                 say "$say_msg"
584                         elif test -n "$must_die_on_failure"
585                         then
586                                 die_with_status 2 "$die_msg"
587                         else
588                                 err="${err};$die_msg"
589                                 continue
590                         fi
591                 fi
592
593                 if test -n "$recursive"
594                 then
595                         (clear_local_git_env; cd "$path" && eval cmd_update "$orig_flags")
596                         res=$?
597                         if test $res -gt 0
598                         then
599                                 die_msg="$(eval_gettext "Failed to recurse into submodule path '\$path'")"
600                                 if test $res -eq 1
601                                 then
602                                         err="${err};$die_msg"
603                                         continue
604                                 else
605                                         die_with_status $res "$die_msg"
606                                 fi
607                         fi
608                 fi
609         done
610
611         if test -n "$err"
612         then
613                 OIFS=$IFS
614                 IFS=';'
615                 for e in $err
616                 do
617                         if test -n "$e"
618                         then
619                                 echo >&2 "$e"
620                         fi
621                 done
622                 IFS=$OIFS
623                 exit 1
624         fi
625         }
626 }
627
628 set_name_rev () {
629         revname=$( (
630                 clear_local_git_env
631                 cd "$1" && {
632                         git describe "$2" 2>/dev/null ||
633                         git describe --tags "$2" 2>/dev/null ||
634                         git describe --contains "$2" 2>/dev/null ||
635                         git describe --all --always "$2"
636                 }
637         ) )
638         test -z "$revname" || revname=" ($revname)"
639 }
640 #
641 # Show commit summary for submodules in index or working tree
642 #
643 # If '--cached' is given, show summary between index and given commit,
644 # or between working tree and given commit
645 #
646 # $@ = [commit (default 'HEAD'),] requested paths (default all)
647 #
648 cmd_summary() {
649         summary_limit=-1
650         for_status=
651         diff_cmd=diff-index
652
653         # parse $args after "submodule ... summary".
654         while test $# -ne 0
655         do
656                 case "$1" in
657                 --cached)
658                         cached="$1"
659                         ;;
660                 --files)
661                         files="$1"
662                         ;;
663                 --for-status)
664                         for_status="$1"
665                         ;;
666                 -n|--summary-limit)
667                         if summary_limit=$(($2 + 0)) 2>/dev/null && test "$summary_limit" = "$2"
668                         then
669                                 :
670                         else
671                                 usage
672                         fi
673                         shift
674                         ;;
675                 --)
676                         shift
677                         break
678                         ;;
679                 -*)
680                         usage
681                         ;;
682                 *)
683                         break
684                         ;;
685                 esac
686                 shift
687         done
688
689         test $summary_limit = 0 && return
690
691         if rev=$(git rev-parse -q --verify --default HEAD ${1+"$1"})
692         then
693                 head=$rev
694                 test $# = 0 || shift
695         elif test -z "$1" -o "$1" = "HEAD"
696         then
697                 # before the first commit: compare with an empty tree
698                 head=$(git hash-object -w -t tree --stdin </dev/null)
699                 test -z "$1" || shift
700         else
701                 head="HEAD"
702         fi
703
704         if [ -n "$files" ]
705         then
706                 test -n "$cached" &&
707                 die "$(gettext -- "--cached cannot be used with --files")"
708                 diff_cmd=diff-files
709                 head=
710         fi
711
712         cd_to_toplevel
713         # Get modified modules cared by user
714         modules=$(git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- "$@" |
715                 sane_egrep '^:([0-7]* )?160000' |
716                 while read mod_src mod_dst sha1_src sha1_dst status name
717                 do
718                         # Always show modules deleted or type-changed (blob<->module)
719                         test $status = D -o $status = T && echo "$name" && continue
720                         # Also show added or modified modules which are checked out
721                         GIT_DIR="$name/.git" git-rev-parse --git-dir >/dev/null 2>&1 &&
722                         echo "$name"
723                 done
724         )
725
726         test -z "$modules" && return
727
728         git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- $modules |
729         sane_egrep '^:([0-7]* )?160000' |
730         cut -c2- |
731         while read mod_src mod_dst sha1_src sha1_dst status name
732         do
733                 if test -z "$cached" &&
734                         test $sha1_dst = 0000000000000000000000000000000000000000
735                 then
736                         case "$mod_dst" in
737                         160000)
738                                 sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
739                                 ;;
740                         100644 | 100755 | 120000)
741                                 sha1_dst=$(git hash-object $name)
742                                 ;;
743                         000000)
744                                 ;; # removed
745                         *)
746                                 # unexpected type
747                                 eval_gettextln "unexpected mode \$mod_dst" >&2
748                                 continue ;;
749                         esac
750                 fi
751                 missing_src=
752                 missing_dst=
753
754                 test $mod_src = 160000 &&
755                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_src^0 >/dev/null &&
756                 missing_src=t
757
758                 test $mod_dst = 160000 &&
759                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_dst^0 >/dev/null &&
760                 missing_dst=t
761
762                 total_commits=
763                 case "$missing_src,$missing_dst" in
764                 t,)
765                         errmsg="$(eval_gettext "  Warn: \$name doesn't contain commit \$sha1_src")"
766                         ;;
767                 ,t)
768                         errmsg="$(eval_gettext "  Warn: \$name doesn't contain commit \$sha1_dst")"
769                         ;;
770                 t,t)
771                         errmsg="$(eval_gettext "  Warn: \$name doesn't contain commits \$sha1_src and \$sha1_dst")"
772                         ;;
773                 *)
774                         errmsg=
775                         total_commits=$(
776                         if test $mod_src = 160000 -a $mod_dst = 160000
777                         then
778                                 range="$sha1_src...$sha1_dst"
779                         elif test $mod_src = 160000
780                         then
781                                 range=$sha1_src
782                         else
783                                 range=$sha1_dst
784                         fi
785                         GIT_DIR="$name/.git" \
786                         git rev-list --first-parent $range -- | wc -l
787                         )
788                         total_commits=" ($(($total_commits + 0)))"
789                         ;;
790                 esac
791
792                 sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
793                 sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
794                 if test $status = T
795                 then
796                         blob="$(gettext "blob")"
797                         submodule="$(gettext "submodule")"
798                         if test $mod_dst = 160000
799                         then
800                                 echo "* $name $sha1_abbr_src($blob)->$sha1_abbr_dst($submodule)$total_commits:"
801                         else
802                                 echo "* $name $sha1_abbr_src($submodule)->$sha1_abbr_dst($blob)$total_commits:"
803                         fi
804                 else
805                         echo "* $name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
806                 fi
807                 if test -n "$errmsg"
808                 then
809                         # Don't give error msg for modification whose dst is not submodule
810                         # i.e. deleted or changed to blob
811                         test $mod_dst = 160000 && echo "$errmsg"
812                 else
813                         if test $mod_src = 160000 -a $mod_dst = 160000
814                         then
815                                 limit=
816                                 test $summary_limit -gt 0 && limit="-$summary_limit"
817                                 GIT_DIR="$name/.git" \
818                                 git log $limit --pretty='format:  %m %s' \
819                                 --first-parent $sha1_src...$sha1_dst
820                         elif test $mod_dst = 160000
821                         then
822                                 GIT_DIR="$name/.git" \
823                                 git log --pretty='format:  > %s' -1 $sha1_dst
824                         else
825                                 GIT_DIR="$name/.git" \
826                                 git log --pretty='format:  < %s' -1 $sha1_src
827                         fi
828                         echo
829                 fi
830                 echo
831         done |
832         if test -n "$for_status"; then
833                 if [ -n "$files" ]; then
834                         gettextln "# Submodules changed but not updated:"
835                 else
836                         gettextln "# Submodule changes to be committed:"
837                 fi
838                 echo "#"
839                 sed -e 's|^|# |' -e 's|^# $|#|'
840         else
841                 cat
842         fi
843 }
844 #
845 # List all submodules, prefixed with:
846 #  - submodule not initialized
847 #  + different revision checked out
848 #
849 # If --cached was specified the revision in the index will be printed
850 # instead of the currently checked out revision.
851 #
852 # $@ = requested paths (default to all)
853 #
854 cmd_status()
855 {
856         # parse $args after "submodule ... status".
857         orig_flags=
858         while test $# -ne 0
859         do
860                 case "$1" in
861                 -q|--quiet)
862                         GIT_QUIET=1
863                         ;;
864                 --cached)
865                         cached=1
866                         ;;
867                 --recursive)
868                         recursive=1
869                         ;;
870                 --)
871                         shift
872                         break
873                         ;;
874                 -*)
875                         usage
876                         ;;
877                 *)
878                         break
879                         ;;
880                 esac
881                 orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
882                 shift
883         done
884
885         module_list "$@" |
886         while read mode sha1 stage path
887         do
888                 name=$(module_name "$path") || exit
889                 url=$(git config submodule."$name".url)
890                 displaypath="$prefix$path"
891                 if test "$stage" = U
892                 then
893                         say "U$sha1 $displaypath"
894                         continue
895                 fi
896                 if test -z "$url" || ! test -d "$path"/.git -o -f "$path"/.git
897                 then
898                         say "-$sha1 $displaypath"
899                         continue;
900                 fi
901                 set_name_rev "$path" "$sha1"
902                 if git diff-files --ignore-submodules=dirty --quiet -- "$path"
903                 then
904                         say " $sha1 $displaypath$revname"
905                 else
906                         if test -z "$cached"
907                         then
908                                 sha1=$(clear_local_git_env; cd "$path" && git rev-parse --verify HEAD)
909                                 set_name_rev "$path" "$sha1"
910                         fi
911                         say "+$sha1 $displaypath$revname"
912                 fi
913
914                 if test -n "$recursive"
915                 then
916                         (
917                                 prefix="$displaypath/"
918                                 clear_local_git_env
919                                 cd "$path" &&
920                                 eval cmd_status "$orig_args"
921                         ) ||
922                         die "$(eval_gettext "Failed to recurse into submodule path '\$path'")"
923                 fi
924         done
925 }
926 #
927 # Sync remote urls for submodules
928 # This makes the value for remote.$remote.url match the value
929 # specified in .gitmodules.
930 #
931 cmd_sync()
932 {
933         while test $# -ne 0
934         do
935                 case "$1" in
936                 -q|--quiet)
937                         GIT_QUIET=1
938                         shift
939                         ;;
940                 --)
941                         shift
942                         break
943                         ;;
944                 -*)
945                         usage
946                         ;;
947                 *)
948                         break
949                         ;;
950                 esac
951         done
952         cd_to_toplevel
953         module_list "$@" |
954         while read mode sha1 stage path
955         do
956                 name=$(module_name "$path")
957                 url=$(git config -f .gitmodules --get submodule."$name".url)
958
959                 # Possibly a url relative to parent
960                 case "$url" in
961                 ./*|../*)
962                         url=$(resolve_relative_url "$url") || exit
963                         ;;
964                 esac
965
966                 if git config "submodule.$name.url" >/dev/null 2>/dev/null
967                 then
968                         say "$(eval_gettext "Synchronizing submodule url for '\$name'")"
969                         git config submodule."$name".url "$url"
970
971                         if test -e "$path"/.git
972                         then
973                         (
974                                 clear_local_git_env
975                                 cd "$path"
976                                 remote=$(get_default_remote)
977                                 git config remote."$remote".url "$url"
978                         )
979                         fi
980                 fi
981         done
982 }
983
984 # This loop parses the command line arguments to find the
985 # subcommand name to dispatch.  Parsing of the subcommand specific
986 # options are primarily done by the subcommand implementations.
987 # Subcommand specific options such as --branch and --cached are
988 # parsed here as well, for backward compatibility.
989
990 while test $# != 0 && test -z "$command"
991 do
992         case "$1" in
993         add | foreach | init | update | status | summary | sync)
994                 command=$1
995                 ;;
996         -q|--quiet)
997                 GIT_QUIET=1
998                 ;;
999         -b|--branch)
1000                 case "$2" in
1001                 '')
1002                         usage
1003                         ;;
1004                 esac
1005                 branch="$2"; shift
1006                 ;;
1007         --cached)
1008                 cached="$1"
1009                 ;;
1010         --)
1011                 break
1012                 ;;
1013         -*)
1014                 usage
1015                 ;;
1016         *)
1017                 break
1018                 ;;
1019         esac
1020         shift
1021 done
1022
1023 # No command word defaults to "status"
1024 test -n "$command" || command=status
1025
1026 # "-b branch" is accepted only by "add"
1027 if test -n "$branch" && test "$command" != add
1028 then
1029         usage
1030 fi
1031
1032 # "--cached" is accepted only by "status" and "summary"
1033 if test -n "$cached" && test "$command" != status -a "$command" != summary
1034 then
1035         usage
1036 fi
1037
1038 "cmd_$command" "$@"