Merge branch 'mm/am-c-doc' into maint
[git] / git-submodule.sh
1 #!/bin/sh
2 #
3 # git-submodule.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] [--name <name>] [--reference <repository>] [--] <repository> [<path>]
9    or: $dashless [--quiet] status [--cached] [--recursive] [--] [<path>...]
10    or: $dashless [--quiet] init [--] [<path>...]
11    or: $dashless [--quiet] deinit [-f|--force] [--] <path>...
12    or: $dashless [--quiet] update [--init] [--remote] [-N|--no-fetch] [-f|--force] [--checkout|--merge|--rebase] [--reference <repository>] [--recursive] [--] [<path>...]
13    or: $dashless [--quiet] summary [--cached|--files] [--summary-limit <n>] [commit] [--] [<path>...]
14    or: $dashless [--quiet] foreach [--recursive] <command>
15    or: $dashless [--quiet] sync [--recursive] [--] [<path>...]"
16 OPTIONS_SPEC=
17 SUBDIRECTORY_OK=Yes
18 . git-sh-setup
19 . git-sh-i18n
20 . git-parse-remote
21 require_work_tree
22 wt_prefix=$(git rev-parse --show-prefix)
23 cd_to_toplevel
24
25 command=
26 branch=
27 force=
28 reference=
29 cached=
30 recursive=
31 init=
32 files=
33 remote=
34 nofetch=
35 update=
36 prefix=
37 custom_name=
38 depth=
39
40 # The function takes at most 2 arguments. The first argument is the
41 # URL that navigates to the submodule origin repo. When relative, this URL
42 # is relative to the superproject origin URL repo. The second up_path
43 # argument, if specified, is the relative path that navigates
44 # from the submodule working tree to the superproject working tree.
45 #
46 # The output of the function is the origin URL of the submodule.
47 #
48 # The output will either be an absolute URL or filesystem path (if the
49 # superproject origin URL is an absolute URL or filesystem path,
50 # respectively) or a relative file system path (if the superproject
51 # origin URL is a relative file system path).
52 #
53 # When the output is a relative file system path, the path is either
54 # relative to the submodule working tree, if up_path is specified, or to
55 # the superproject working tree otherwise.
56 resolve_relative_url ()
57 {
58         remote=$(get_default_remote)
59         remoteurl=$(git config "remote.$remote.url") ||
60                 remoteurl=$(pwd) # the repository is its own authoritative upstream
61         url="$1"
62         remoteurl=${remoteurl%/}
63         sep=/
64         up_path="$2"
65
66         case "$remoteurl" in
67         *:*|/*)
68                 is_relative=
69                 ;;
70         ./*|../*)
71                 is_relative=t
72                 ;;
73         *)
74                 is_relative=t
75                 remoteurl="./$remoteurl"
76                 ;;
77         esac
78
79         while test -n "$url"
80         do
81                 case "$url" in
82                 ../*)
83                         url="${url#../}"
84                         case "$remoteurl" in
85                         */*)
86                                 remoteurl="${remoteurl%/*}"
87                                 ;;
88                         *:*)
89                                 remoteurl="${remoteurl%:*}"
90                                 sep=:
91                                 ;;
92                         *)
93                                 if test -z "$is_relative" || test "." = "$remoteurl"
94                                 then
95                                         die "$(eval_gettext "cannot strip one component off url '\$remoteurl'")"
96                                 else
97                                         remoteurl=.
98                                 fi
99                                 ;;
100                         esac
101                         ;;
102                 ./*)
103                         url="${url#./}"
104                         ;;
105                 *)
106                         break;;
107                 esac
108         done
109         remoteurl="$remoteurl$sep${url%/}"
110         echo "${is_relative:+${up_path}}${remoteurl#./}"
111 }
112
113 # Resolve a path to be relative to another path.  This is intended for
114 # converting submodule paths when git-submodule is run in a subdirectory
115 # and only handles paths where the directory separator is '/'.
116 #
117 # The output is the first argument as a path relative to the second argument,
118 # which defaults to $wt_prefix if it is omitted.
119 relative_path ()
120 {
121         local target curdir result
122         target=$1
123         curdir=${2-$wt_prefix}
124         curdir=${curdir%/}
125         result=
126
127         while test -n "$curdir"
128         do
129                 case "$target" in
130                 "$curdir/"*)
131                         target=${target#"$curdir"/}
132                         break
133                         ;;
134                 esac
135
136                 result="${result}../"
137                 if test "$curdir" = "${curdir%/*}"
138                 then
139                         curdir=
140                 else
141                         curdir="${curdir%/*}"
142                 fi
143         done
144
145         echo "$result$target"
146 }
147
148 #
149 # Get submodule info for registered submodules
150 # $@ = path to limit submodule list
151 #
152 module_list()
153 {
154         eval "set $(git rev-parse --sq --prefix "$wt_prefix" -- "$@")"
155         (
156                 git ls-files -z --error-unmatch --stage -- "$@" ||
157                 echo "unmatched pathspec exists"
158         ) |
159         @@PERL@@ -e '
160         my %unmerged = ();
161         my ($null_sha1) = ("0" x 40);
162         my @out = ();
163         my $unmatched = 0;
164         $/ = "\0";
165         while (<STDIN>) {
166                 if (/^unmatched pathspec/) {
167                         $unmatched = 1;
168                         next;
169                 }
170                 chomp;
171                 my ($mode, $sha1, $stage, $path) =
172                         /^([0-7]+) ([0-9a-f]{40}) ([0-3])\t(.*)$/;
173                 next unless $mode eq "160000";
174                 if ($stage ne "0") {
175                         if (!$unmerged{$path}++) {
176                                 push @out, "$mode $null_sha1 U\t$path\n";
177                         }
178                         next;
179                 }
180                 push @out, "$_\n";
181         }
182         if ($unmatched) {
183                 print "#unmatched\n";
184         } else {
185                 print for (@out);
186         }
187         '
188 }
189
190 die_if_unmatched ()
191 {
192         if test "$1" = "#unmatched"
193         then
194                 exit 1
195         fi
196 }
197
198 #
199 # Print a submodule configuration setting
200 #
201 # $1 = submodule name
202 # $2 = option name
203 # $3 = default value
204 #
205 # Checks in the usual git-config places first (for overrides),
206 # otherwise it falls back on .gitmodules.  This allows you to
207 # distribute project-wide defaults in .gitmodules, while still
208 # customizing individual repositories if necessary.  If the option is
209 # not in .gitmodules either, print a default value.
210 #
211 get_submodule_config () {
212         name="$1"
213         option="$2"
214         default="$3"
215         value=$(git config submodule."$name"."$option")
216         if test -z "$value"
217         then
218                 value=$(git config -f .gitmodules submodule."$name"."$option")
219         fi
220         printf '%s' "${value:-$default}"
221 }
222
223
224 #
225 # Map submodule path to submodule name
226 #
227 # $1 = path
228 #
229 module_name()
230 {
231         # Do we have "submodule.<something>.path = $1" defined in .gitmodules file?
232         sm_path="$1"
233         re=$(printf '%s\n' "$1" | sed -e 's/[].[^$\\*]/\\&/g')
234         name=$( git config -f .gitmodules --get-regexp '^submodule\..*\.path$' |
235                 sed -n -e 's|^submodule\.\(.*\)\.path '"$re"'$|\1|p' )
236         test -z "$name" &&
237         die "$(eval_gettext "No submodule mapping found in .gitmodules for path '\$sm_path'")"
238         printf '%s\n' "$name"
239 }
240
241 #
242 # Clone a submodule
243 #
244 # $1 = submodule path
245 # $2 = submodule name
246 # $3 = URL to clone
247 # $4 = reference repository to reuse (empty for independent)
248 # $5 = depth argument for shallow clones (empty for deep)
249 #
250 # Prior to calling, cmd_update checks that a possibly existing
251 # path is not a git repository.
252 # Likewise, cmd_add checks that path does not exist at all,
253 # since it is the location of a new submodule.
254 #
255 module_clone()
256 {
257         sm_path=$1
258         name=$2
259         url=$3
260         reference="$4"
261         depth="$5"
262         quiet=
263         if test -n "$GIT_QUIET"
264         then
265                 quiet=-q
266         fi
267
268         gitdir=
269         gitdir_base=
270         base_name=$(dirname "$name")
271
272         gitdir=$(git rev-parse --git-dir)
273         gitdir_base="$gitdir/modules/$base_name"
274         gitdir="$gitdir/modules/$name"
275
276         if test -d "$gitdir"
277         then
278                 mkdir -p "$sm_path"
279                 rm -f "$gitdir/index"
280         else
281                 mkdir -p "$gitdir_base"
282                 (
283                         clear_local_git_env
284                         git clone $quiet ${depth:+"$depth"} -n ${reference:+"$reference"} \
285                                 --separate-git-dir "$gitdir" "$url" "$sm_path"
286                 ) ||
287                 die "$(eval_gettext "Clone of '\$url' into submodule path '\$sm_path' failed")"
288         fi
289
290         # We already are at the root of the work tree but cd_to_toplevel will
291         # resolve any symlinks that might be present in $PWD
292         a=$(cd_to_toplevel && cd "$gitdir" && pwd)/
293         b=$(cd_to_toplevel && cd "$sm_path" && pwd)/
294         # Remove all common leading directories after a sanity check
295         if test "${a#$b}" != "$a" || test "${b#$a}" != "$b"; then
296                 die "$(eval_gettext "Gitdir '\$a' is part of the submodule path '\$b' or vice versa")"
297         fi
298         while test "${a%%/*}" = "${b%%/*}"
299         do
300                 a=${a#*/}
301                 b=${b#*/}
302         done
303         # Now chop off the trailing '/'s that were added in the beginning
304         a=${a%/}
305         b=${b%/}
306
307         # Turn each leading "*/" component into "../"
308         rel=$(printf '%s\n' "$b" | sed -e 's|[^/][^/]*|..|g')
309         printf '%s\n' "gitdir: $rel/$a" >"$sm_path/.git"
310
311         rel=$(printf '%s\n' "$a" | sed -e 's|[^/][^/]*|..|g')
312         (clear_local_git_env; cd "$sm_path" && GIT_WORK_TREE=. git config core.worktree "$rel/$b")
313 }
314
315 isnumber()
316 {
317         n=$(($1 + 0)) 2>/dev/null && test "$n" = "$1"
318 }
319
320 #
321 # Add a new submodule to the working tree, .gitmodules and the index
322 #
323 # $@ = repo path
324 #
325 # optional branch is stored in global branch variable
326 #
327 cmd_add()
328 {
329         # parse $args after "submodule ... add".
330         reference_path=
331         while test $# -ne 0
332         do
333                 case "$1" in
334                 -b | --branch)
335                         case "$2" in '') usage ;; esac
336                         branch=$2
337                         shift
338                         ;;
339                 -f | --force)
340                         force=$1
341                         ;;
342                 -q|--quiet)
343                         GIT_QUIET=1
344                         ;;
345                 --reference)
346                         case "$2" in '') usage ;; esac
347                         reference_path=$2
348                         shift
349                         ;;
350                 --reference=*)
351                         reference_path="${1#--reference=}"
352                         ;;
353                 --name)
354                         case "$2" in '') usage ;; esac
355                         custom_name=$2
356                         shift
357                         ;;
358                 --depth)
359                         case "$2" in '') usage ;; esac
360                         depth="--depth=$2"
361                         shift
362                         ;;
363                 --depth=*)
364                         depth=$1
365                         ;;
366                 --)
367                         shift
368                         break
369                         ;;
370                 -*)
371                         usage
372                         ;;
373                 *)
374                         break
375                         ;;
376                 esac
377                 shift
378         done
379
380         if test -n "$reference_path"
381         then
382                 is_absolute_path "$reference_path" ||
383                 reference_path="$wt_prefix$reference_path"
384
385                 reference="--reference=$reference_path"
386         fi
387
388         repo=$1
389         sm_path=$2
390
391         if test -z "$sm_path"; then
392                 sm_path=$(printf '%s\n' "$repo" |
393                         sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
394         fi
395
396         if test -z "$repo" || test -z "$sm_path"; then
397                 usage
398         fi
399
400         is_absolute_path "$sm_path" || sm_path="$wt_prefix$sm_path"
401
402         # assure repo is absolute or relative to parent
403         case "$repo" in
404         ./*|../*)
405                 test -z "$wt_prefix" ||
406                 die "$(gettext "Relative path can only be used from the toplevel of the working tree")"
407
408                 # dereference source url relative to parent's url
409                 realrepo=$(resolve_relative_url "$repo") || exit
410                 ;;
411         *:*|/*)
412                 # absolute url
413                 realrepo=$repo
414                 ;;
415         *)
416                 die "$(eval_gettext "repo URL: '\$repo' must be absolute or begin with ./|../")"
417         ;;
418         esac
419
420         # normalize path:
421         # multiple //; leading ./; /./; /../; trailing /
422         sm_path=$(printf '%s/\n' "$sm_path" |
423                 sed -e '
424                         s|//*|/|g
425                         s|^\(\./\)*||
426                         s|/\(\./\)*|/|g
427                         :start
428                         s|\([^/]*\)/\.\./||
429                         tstart
430                         s|/*$||
431                 ')
432         git ls-files --error-unmatch "$sm_path" > /dev/null 2>&1 &&
433         die "$(eval_gettext "'\$sm_path' already exists in the index")"
434
435         if test -z "$force" && ! git add --dry-run --ignore-missing "$sm_path" > /dev/null 2>&1
436         then
437                 eval_gettextln "The following path is ignored by one of your .gitignore files:
438 \$sm_path
439 Use -f if you really want to add it." >&2
440                 exit 1
441         fi
442
443         if test -n "$custom_name"
444         then
445                 sm_name="$custom_name"
446         else
447                 sm_name="$sm_path"
448         fi
449
450         # perhaps the path exists and is already a git repo, else clone it
451         if test -e "$sm_path"
452         then
453                 if test -d "$sm_path"/.git || test -f "$sm_path"/.git
454                 then
455                         eval_gettextln "Adding existing repo at '\$sm_path' to the index"
456                 else
457                         die "$(eval_gettext "'\$sm_path' already exists and is not a valid git repo")"
458                 fi
459
460         else
461                 if test -d ".git/modules/$sm_name"
462                 then
463                         if test -z "$force"
464                         then
465                                 echo >&2 "$(eval_gettext "A git directory for '\$sm_name' is found locally with remote(s):")"
466                                 GIT_DIR=".git/modules/$sm_name" GIT_WORK_TREE=. git remote -v | grep '(fetch)' | sed -e s,^,"  ", -e s,' (fetch)',, >&2
467                                 echo >&2 "$(eval_gettext "If you want to reuse this local git directory instead of cloning again from")"
468                                 echo >&2 "  $realrepo"
469                                 echo >&2 "$(eval_gettext "use the '--force' option. If the local git directory is not the correct repo")"
470                                 die "$(eval_gettext "or you are unsure what this means choose another name with the '--name' option.")"
471                         else
472                                 echo "$(eval_gettext "Reactivating local git directory for submodule '\$sm_name'.")"
473                         fi
474                 fi
475                 module_clone "$sm_path" "$sm_name" "$realrepo" "$reference" "$depth" || exit
476                 (
477                         clear_local_git_env
478                         cd "$sm_path" &&
479                         # ash fails to wordsplit ${branch:+-b "$branch"...}
480                         case "$branch" in
481                         '') git checkout -f -q ;;
482                         ?*) git checkout -f -q -B "$branch" "origin/$branch" ;;
483                         esac
484                 ) || die "$(eval_gettext "Unable to checkout submodule '\$sm_path'")"
485         fi
486         git config submodule."$sm_name".url "$realrepo"
487
488         git add $force "$sm_path" ||
489         die "$(eval_gettext "Failed to add submodule '\$sm_path'")"
490
491         git config -f .gitmodules submodule."$sm_name".path "$sm_path" &&
492         git config -f .gitmodules submodule."$sm_name".url "$repo" &&
493         if test -n "$branch"
494         then
495                 git config -f .gitmodules submodule."$sm_name".branch "$branch"
496         fi &&
497         git add --force .gitmodules ||
498         die "$(eval_gettext "Failed to register submodule '\$sm_path'")"
499 }
500
501 #
502 # Execute an arbitrary command sequence in each checked out
503 # submodule
504 #
505 # $@ = command to execute
506 #
507 cmd_foreach()
508 {
509         # parse $args after "submodule ... foreach".
510         while test $# -ne 0
511         do
512                 case "$1" in
513                 -q|--quiet)
514                         GIT_QUIET=1
515                         ;;
516                 --recursive)
517                         recursive=1
518                         ;;
519                 -*)
520                         usage
521                         ;;
522                 *)
523                         break
524                         ;;
525                 esac
526                 shift
527         done
528
529         toplevel=$(pwd)
530
531         # dup stdin so that it can be restored when running the external
532         # command in the subshell (and a recursive call to this function)
533         exec 3<&0
534
535         module_list |
536         while read mode sha1 stage sm_path
537         do
538                 die_if_unmatched "$mode"
539                 if test -e "$sm_path"/.git
540                 then
541                         displaypath=$(relative_path "$sm_path")
542                         say "$(eval_gettext "Entering '\$prefix\$displaypath'")"
543                         name=$(module_name "$sm_path")
544                         (
545                                 prefix="$prefix$sm_path/"
546                                 clear_local_git_env
547                                 cd "$sm_path" &&
548                                 sm_path=$(relative_path "$sm_path") &&
549                                 # we make $path available to scripts ...
550                                 path=$sm_path &&
551                                 if test $# -eq 1
552                                 then
553                                         eval "$1"
554                                 else
555                                         "$@"
556                                 fi &&
557                                 if test -n "$recursive"
558                                 then
559                                         cmd_foreach "--recursive" "$@"
560                                 fi
561                         ) <&3 3<&- ||
562                         die "$(eval_gettext "Stopping at '\$prefix\$displaypath'; script returned non-zero status.")"
563                 fi
564         done
565 }
566
567 #
568 # Register submodules in .git/config
569 #
570 # $@ = requested paths (default to all)
571 #
572 cmd_init()
573 {
574         # parse $args after "submodule ... init".
575         while test $# -ne 0
576         do
577                 case "$1" in
578                 -q|--quiet)
579                         GIT_QUIET=1
580                         ;;
581                 --)
582                         shift
583                         break
584                         ;;
585                 -*)
586                         usage
587                         ;;
588                 *)
589                         break
590                         ;;
591                 esac
592                 shift
593         done
594
595         module_list "$@" |
596         while read mode sha1 stage sm_path
597         do
598                 die_if_unmatched "$mode"
599                 name=$(module_name "$sm_path") || exit
600
601                 displaypath=$(relative_path "$sm_path")
602
603                 # Copy url setting when it is not set yet
604                 if test -z "$(git config "submodule.$name.url")"
605                 then
606                         url=$(git config -f .gitmodules submodule."$name".url)
607                         test -z "$url" &&
608                         die "$(eval_gettext "No url found for submodule path '\$displaypath' in .gitmodules")"
609
610                         # Possibly a url relative to parent
611                         case "$url" in
612                         ./*|../*)
613                                 url=$(resolve_relative_url "$url") || exit
614                                 ;;
615                         esac
616                         git config submodule."$name".url "$url" ||
617                         die "$(eval_gettext "Failed to register url for submodule path '\$displaypath'")"
618
619                         say "$(eval_gettext "Submodule '\$name' (\$url) registered for path '\$displaypath'")"
620                 fi
621
622                 # Copy "update" setting when it is not set yet
623                 if upd="$(git config -f .gitmodules submodule."$name".update)" &&
624                    test -n "$upd" &&
625                    test -z "$(git config submodule."$name".update)"
626                 then
627                         case "$upd" in
628                         checkout | rebase | merge | none)
629                                 ;; # known modes of updating
630                         *)
631                                 echo >&2 "warning: unknown update mode '$upd' suggested for submodule '$name'"
632                                 upd=none
633                                 ;;
634                         esac
635                         git config submodule."$name".update "$upd" ||
636                         die "$(eval_gettext "Failed to register update mode for submodule path '\$displaypath'")"
637                 fi
638         done
639 }
640
641 #
642 # Unregister submodules from .git/config and remove their work tree
643 #
644 # $@ = requested paths (use '.' to deinit all submodules)
645 #
646 cmd_deinit()
647 {
648         # parse $args after "submodule ... deinit".
649         while test $# -ne 0
650         do
651                 case "$1" in
652                 -f|--force)
653                         force=$1
654                         ;;
655                 -q|--quiet)
656                         GIT_QUIET=1
657                         ;;
658                 --)
659                         shift
660                         break
661                         ;;
662                 -*)
663                         usage
664                         ;;
665                 *)
666                         break
667                         ;;
668                 esac
669                 shift
670         done
671
672         if test $# = 0
673         then
674                 die "$(eval_gettext "Use '.' if you really want to deinitialize all submodules")"
675         fi
676
677         module_list "$@" |
678         while read mode sha1 stage sm_path
679         do
680                 die_if_unmatched "$mode"
681                 name=$(module_name "$sm_path") || exit
682
683                 displaypath=$(relative_path "$sm_path")
684
685                 # Remove the submodule work tree (unless the user already did it)
686                 if test -d "$sm_path"
687                 then
688                         # Protect submodules containing a .git directory
689                         if test -d "$sm_path/.git"
690                         then
691                                 echo >&2 "$(eval_gettext "Submodule work tree '\$displaypath' contains a .git directory")"
692                                 die "$(eval_gettext "(use 'rm -rf' if you really want to remove it including all of its history)")"
693                         fi
694
695                         if test -z "$force"
696                         then
697                                 git rm -qn "$sm_path" ||
698                                 die "$(eval_gettext "Submodule work tree '\$displaypath' contains local modifications; use '-f' to discard them")"
699                         fi
700                         rm -rf "$sm_path" &&
701                         say "$(eval_gettext "Cleared directory '\$displaypath'")" ||
702                         say "$(eval_gettext "Could not remove submodule work tree '\$displaypath'")"
703                 fi
704
705                 mkdir "$sm_path" || say "$(eval_gettext "Could not create empty submodule directory '\$displaypath'")"
706
707                 # Remove the .git/config entries (unless the user already did it)
708                 if test -n "$(git config --get-regexp submodule."$name\.")"
709                 then
710                         # Remove the whole section so we have a clean state when
711                         # the user later decides to init this submodule again
712                         url=$(git config submodule."$name".url)
713                         git config --remove-section submodule."$name" 2>/dev/null &&
714                         say "$(eval_gettext "Submodule '\$name' (\$url) unregistered for path '\$displaypath'")"
715                 fi
716         done
717 }
718
719 #
720 # Update each submodule path to correct revision, using clone and checkout as needed
721 #
722 # $@ = requested paths (default to all)
723 #
724 cmd_update()
725 {
726         # parse $args after "submodule ... update".
727         while test $# -ne 0
728         do
729                 case "$1" in
730                 -q|--quiet)
731                         GIT_QUIET=1
732                         ;;
733                 -i|--init)
734                         init=1
735                         ;;
736                 --remote)
737                         remote=1
738                         ;;
739                 -N|--no-fetch)
740                         nofetch=1
741                         ;;
742                 -f|--force)
743                         force=$1
744                         ;;
745                 -r|--rebase)
746                         update="rebase"
747                         ;;
748                 --reference)
749                         case "$2" in '') usage ;; esac
750                         reference="--reference=$2"
751                         shift
752                         ;;
753                 --reference=*)
754                         reference="$1"
755                         ;;
756                 -m|--merge)
757                         update="merge"
758                         ;;
759                 --recursive)
760                         recursive=1
761                         ;;
762                 --checkout)
763                         update="checkout"
764                         ;;
765                 --depth)
766                         case "$2" in '') usage ;; esac
767                         depth="--depth=$2"
768                         shift
769                         ;;
770                 --depth=*)
771                         depth=$1
772                         ;;
773                 --)
774                         shift
775                         break
776                         ;;
777                 -*)
778                         usage
779                         ;;
780                 *)
781                         break
782                         ;;
783                 esac
784                 shift
785         done
786
787         if test -n "$init"
788         then
789                 cmd_init "--" "$@" || return
790         fi
791
792         cloned_modules=
793         module_list "$@" | {
794         err=
795         while read mode sha1 stage sm_path
796         do
797                 die_if_unmatched "$mode"
798                 if test "$stage" = U
799                 then
800                         echo >&2 "Skipping unmerged submodule $prefix$sm_path"
801                         continue
802                 fi
803                 name=$(module_name "$sm_path") || exit
804                 url=$(git config submodule."$name".url)
805                 branch=$(get_submodule_config "$name" branch master)
806                 if ! test -z "$update"
807                 then
808                         update_module=$update
809                 else
810                         update_module=$(git config submodule."$name".update)
811                         if test -z "$update_module"
812                         then
813                                 update_module="checkout"
814                         fi
815                 fi
816
817                 displaypath=$(relative_path "$prefix$sm_path")
818
819                 if test "$update_module" = "none"
820                 then
821                         echo "Skipping submodule '$displaypath'"
822                         continue
823                 fi
824
825                 if test -z "$url"
826                 then
827                         # Only mention uninitialized submodules when its
828                         # path have been specified
829                         test "$#" != "0" &&
830                         say "$(eval_gettext "Submodule path '\$displaypath' not initialized
831 Maybe you want to use 'update --init'?")"
832                         continue
833                 fi
834
835                 if ! test -d "$sm_path"/.git && ! test -f "$sm_path"/.git
836                 then
837                         module_clone "$sm_path" "$name" "$url" "$reference" "$depth" || exit
838                         cloned_modules="$cloned_modules;$name"
839                         subsha1=
840                 else
841                         subsha1=$(clear_local_git_env; cd "$sm_path" &&
842                                 git rev-parse --verify HEAD) ||
843                         die "$(eval_gettext "Unable to find current revision in submodule path '\$displaypath'")"
844                 fi
845
846                 if test -n "$remote"
847                 then
848                         if test -z "$nofetch"
849                         then
850                                 # Fetch remote before determining tracking $sha1
851                                 (clear_local_git_env; cd "$sm_path" && git-fetch) ||
852                                 die "$(eval_gettext "Unable to fetch in submodule path '\$sm_path'")"
853                         fi
854                         remote_name=$(clear_local_git_env; cd "$sm_path" && get_default_remote)
855                         sha1=$(clear_local_git_env; cd "$sm_path" &&
856                                 git rev-parse --verify "${remote_name}/${branch}") ||
857                         die "$(eval_gettext "Unable to find current ${remote_name}/${branch} revision in submodule path '\$sm_path'")"
858                 fi
859
860                 if test "$subsha1" != "$sha1" || test -n "$force"
861                 then
862                         subforce=$force
863                         # If we don't already have a -f flag and the submodule has never been checked out
864                         if test -z "$subsha1" && test -z "$force"
865                         then
866                                 subforce="-f"
867                         fi
868
869                         if test -z "$nofetch"
870                         then
871                                 # Run fetch only if $sha1 isn't present or it
872                                 # is not reachable from a ref.
873                                 (clear_local_git_env; cd "$sm_path" &&
874                                         ( (rev=$(git rev-list -n 1 $sha1 --not --all 2>/dev/null) &&
875                                          test -z "$rev") || git-fetch)) ||
876                                 die "$(eval_gettext "Unable to fetch in submodule path '\$displaypath'")"
877                         fi
878
879                         # Is this something we just cloned?
880                         case ";$cloned_modules;" in
881                         *";$name;"*)
882                                 # then there is no local change to integrate
883                                 update_module=checkout ;;
884                         esac
885
886                         must_die_on_failure=
887                         case "$update_module" in
888                         checkout)
889                                 command="git checkout $subforce -q"
890                                 die_msg="$(eval_gettext "Unable to checkout '\$sha1' in submodule path '\$displaypath'")"
891                                 say_msg="$(eval_gettext "Submodule path '\$displaypath': checked out '\$sha1'")"
892                                 ;;
893                         rebase)
894                                 command="git rebase"
895                                 die_msg="$(eval_gettext "Unable to rebase '\$sha1' in submodule path '\$displaypath'")"
896                                 say_msg="$(eval_gettext "Submodule path '\$displaypath': rebased into '\$sha1'")"
897                                 must_die_on_failure=yes
898                                 ;;
899                         merge)
900                                 command="git merge"
901                                 die_msg="$(eval_gettext "Unable to merge '\$sha1' in submodule path '\$displaypath'")"
902                                 say_msg="$(eval_gettext "Submodule path '\$displaypath': merged in '\$sha1'")"
903                                 must_die_on_failure=yes
904                                 ;;
905                         !*)
906                                 command="${update_module#!}"
907                                 die_msg="$(eval_gettext "Execution of '\$command \$sha1' failed in submodule  path '\$prefix\$sm_path'")"
908                                 say_msg="$(eval_gettext "Submodule path '\$prefix\$sm_path': '\$command \$sha1'")"
909                                 must_die_on_failure=yes
910                                 ;;
911                         *)
912                                 die "$(eval_gettext "Invalid update mode '$update_module' for submodule '$name'")"
913                         esac
914
915                         if (clear_local_git_env; cd "$sm_path" && $command "$sha1")
916                         then
917                                 say "$say_msg"
918                         elif test -n "$must_die_on_failure"
919                         then
920                                 die_with_status 2 "$die_msg"
921                         else
922                                 err="${err};$die_msg"
923                                 continue
924                         fi
925                 fi
926
927                 if test -n "$recursive"
928                 then
929                         (
930                                 prefix="$prefix$sm_path/"
931                                 clear_local_git_env
932                                 cd "$sm_path" &&
933                                 eval cmd_update
934                         )
935                         res=$?
936                         if test $res -gt 0
937                         then
938                                 die_msg="$(eval_gettext "Failed to recurse into submodule path '\$displaypath'")"
939                                 if test $res -eq 1
940                                 then
941                                         err="${err};$die_msg"
942                                         continue
943                                 else
944                                         die_with_status $res "$die_msg"
945                                 fi
946                         fi
947                 fi
948         done
949
950         if test -n "$err"
951         then
952                 OIFS=$IFS
953                 IFS=';'
954                 for e in $err
955                 do
956                         if test -n "$e"
957                         then
958                                 echo >&2 "$e"
959                         fi
960                 done
961                 IFS=$OIFS
962                 exit 1
963         fi
964         }
965 }
966
967 set_name_rev () {
968         revname=$( (
969                 clear_local_git_env
970                 cd "$1" && {
971                         git describe "$2" 2>/dev/null ||
972                         git describe --tags "$2" 2>/dev/null ||
973                         git describe --contains "$2" 2>/dev/null ||
974                         git describe --all --always "$2"
975                 }
976         ) )
977         test -z "$revname" || revname=" ($revname)"
978 }
979 #
980 # Show commit summary for submodules in index or working tree
981 #
982 # If '--cached' is given, show summary between index and given commit,
983 # or between working tree and given commit
984 #
985 # $@ = [commit (default 'HEAD'),] requested paths (default all)
986 #
987 cmd_summary() {
988         summary_limit=-1
989         for_status=
990         diff_cmd=diff-index
991
992         # parse $args after "submodule ... summary".
993         while test $# -ne 0
994         do
995                 case "$1" in
996                 --cached)
997                         cached="$1"
998                         ;;
999                 --files)
1000                         files="$1"
1001                         ;;
1002                 --for-status)
1003                         for_status="$1"
1004                         ;;
1005                 -n|--summary-limit)
1006                         summary_limit="$2"
1007                         isnumber "$summary_limit" || usage
1008                         shift
1009                         ;;
1010                 --summary-limit=*)
1011                         summary_limit="${1#--summary-limit=}"
1012                         isnumber "$summary_limit" || usage
1013                         ;;
1014                 --)
1015                         shift
1016                         break
1017                         ;;
1018                 -*)
1019                         usage
1020                         ;;
1021                 *)
1022                         break
1023                         ;;
1024                 esac
1025                 shift
1026         done
1027
1028         test $summary_limit = 0 && return
1029
1030         if rev=$(git rev-parse -q --verify --default HEAD ${1+"$1"})
1031         then
1032                 head=$rev
1033                 test $# = 0 || shift
1034         elif test -z "$1" || test "$1" = "HEAD"
1035         then
1036                 # before the first commit: compare with an empty tree
1037                 head=$(git hash-object -w -t tree --stdin </dev/null)
1038                 test -z "$1" || shift
1039         else
1040                 head="HEAD"
1041         fi
1042
1043         if [ -n "$files" ]
1044         then
1045                 test -n "$cached" &&
1046                 die "$(gettext "The --cached option cannot be used with the --files option")"
1047                 diff_cmd=diff-files
1048                 head=
1049         fi
1050
1051         cd_to_toplevel
1052         eval "set $(git rev-parse --sq --prefix "$wt_prefix" -- "$@")"
1053         # Get modified modules cared by user
1054         modules=$(git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- "$@" |
1055                 sane_egrep '^:([0-7]* )?160000' |
1056                 while read mod_src mod_dst sha1_src sha1_dst status sm_path
1057                 do
1058                         # Always show modules deleted or type-changed (blob<->module)
1059                         if test "$status" = D || test "$status" = T
1060                         then
1061                                 printf '%s\n' "$sm_path"
1062                                 continue
1063                         fi
1064                         # Respect the ignore setting for --for-status.
1065                         if test -n "$for_status"
1066                         then
1067                                 name=$(module_name "$sm_path")
1068                                 ignore_config=$(get_submodule_config "$name" ignore none)
1069                                 test $status != A && test $ignore_config = all && continue
1070                         fi
1071                         # Also show added or modified modules which are checked out
1072                         GIT_DIR="$sm_path/.git" git-rev-parse --git-dir >/dev/null 2>&1 &&
1073                         printf '%s\n' "$sm_path"
1074                 done
1075         )
1076
1077         test -z "$modules" && return
1078
1079         git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- $modules |
1080         sane_egrep '^:([0-7]* )?160000' |
1081         cut -c2- |
1082         while read mod_src mod_dst sha1_src sha1_dst status name
1083         do
1084                 if test -z "$cached" &&
1085                         test $sha1_dst = 0000000000000000000000000000000000000000
1086                 then
1087                         case "$mod_dst" in
1088                         160000)
1089                                 sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
1090                                 ;;
1091                         100644 | 100755 | 120000)
1092                                 sha1_dst=$(git hash-object $name)
1093                                 ;;
1094                         000000)
1095                                 ;; # removed
1096                         *)
1097                                 # unexpected type
1098                                 eval_gettextln "unexpected mode \$mod_dst" >&2
1099                                 continue ;;
1100                         esac
1101                 fi
1102                 missing_src=
1103                 missing_dst=
1104
1105                 test $mod_src = 160000 &&
1106                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_src^0 >/dev/null &&
1107                 missing_src=t
1108
1109                 test $mod_dst = 160000 &&
1110                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_dst^0 >/dev/null &&
1111                 missing_dst=t
1112
1113                 display_name=$(relative_path "$name")
1114
1115                 total_commits=
1116                 case "$missing_src,$missing_dst" in
1117                 t,)
1118                         errmsg="$(eval_gettext "  Warn: \$display_name doesn't contain commit \$sha1_src")"
1119                         ;;
1120                 ,t)
1121                         errmsg="$(eval_gettext "  Warn: \$display_name doesn't contain commit \$sha1_dst")"
1122                         ;;
1123                 t,t)
1124                         errmsg="$(eval_gettext "  Warn: \$display_name doesn't contain commits \$sha1_src and \$sha1_dst")"
1125                         ;;
1126                 *)
1127                         errmsg=
1128                         total_commits=$(
1129                         if test $mod_src = 160000 && test $mod_dst = 160000
1130                         then
1131                                 range="$sha1_src...$sha1_dst"
1132                         elif test $mod_src = 160000
1133                         then
1134                                 range=$sha1_src
1135                         else
1136                                 range=$sha1_dst
1137                         fi
1138                         GIT_DIR="$name/.git" \
1139                         git rev-list --first-parent $range -- | wc -l
1140                         )
1141                         total_commits=" ($(($total_commits + 0)))"
1142                         ;;
1143                 esac
1144
1145                 sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
1146                 sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
1147                 if test $status = T
1148                 then
1149                         blob="$(gettext "blob")"
1150                         submodule="$(gettext "submodule")"
1151                         if test $mod_dst = 160000
1152                         then
1153                                 echo "* $display_name $sha1_abbr_src($blob)->$sha1_abbr_dst($submodule)$total_commits:"
1154                         else
1155                                 echo "* $display_name $sha1_abbr_src($submodule)->$sha1_abbr_dst($blob)$total_commits:"
1156                         fi
1157                 else
1158                         echo "* $display_name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
1159                 fi
1160                 if test -n "$errmsg"
1161                 then
1162                         # Don't give error msg for modification whose dst is not submodule
1163                         # i.e. deleted or changed to blob
1164                         test $mod_dst = 160000 && echo "$errmsg"
1165                 else
1166                         if test $mod_src = 160000 && test $mod_dst = 160000
1167                         then
1168                                 limit=
1169                                 test $summary_limit -gt 0 && limit="-$summary_limit"
1170                                 GIT_DIR="$name/.git" \
1171                                 git log $limit --pretty='format:  %m %s' \
1172                                 --first-parent $sha1_src...$sha1_dst
1173                         elif test $mod_dst = 160000
1174                         then
1175                                 GIT_DIR="$name/.git" \
1176                                 git log --pretty='format:  > %s' -1 $sha1_dst
1177                         else
1178                                 GIT_DIR="$name/.git" \
1179                                 git log --pretty='format:  < %s' -1 $sha1_src
1180                         fi
1181                         echo
1182                 fi
1183                 echo
1184         done
1185 }
1186 #
1187 # List all submodules, prefixed with:
1188 #  - submodule not initialized
1189 #  + different revision checked out
1190 #
1191 # If --cached was specified the revision in the index will be printed
1192 # instead of the currently checked out revision.
1193 #
1194 # $@ = requested paths (default to all)
1195 #
1196 cmd_status()
1197 {
1198         # parse $args after "submodule ... status".
1199         while test $# -ne 0
1200         do
1201                 case "$1" in
1202                 -q|--quiet)
1203                         GIT_QUIET=1
1204                         ;;
1205                 --cached)
1206                         cached=1
1207                         ;;
1208                 --recursive)
1209                         recursive=1
1210                         ;;
1211                 --)
1212                         shift
1213                         break
1214                         ;;
1215                 -*)
1216                         usage
1217                         ;;
1218                 *)
1219                         break
1220                         ;;
1221                 esac
1222                 shift
1223         done
1224
1225         module_list "$@" |
1226         while read mode sha1 stage sm_path
1227         do
1228                 die_if_unmatched "$mode"
1229                 name=$(module_name "$sm_path") || exit
1230                 url=$(git config submodule."$name".url)
1231                 displaypath=$(relative_path "$prefix$sm_path")
1232                 if test "$stage" = U
1233                 then
1234                         say "U$sha1 $displaypath"
1235                         continue
1236                 fi
1237                 if test -z "$url" ||
1238                 {
1239                         ! test -d "$sm_path"/.git &&
1240                         ! test -f "$sm_path"/.git
1241                 }
1242                 then
1243                         say "-$sha1 $displaypath"
1244                         continue;
1245                 fi
1246                 if git diff-files --ignore-submodules=dirty --quiet -- "$sm_path"
1247                 then
1248                         set_name_rev "$sm_path" "$sha1"
1249                         say " $sha1 $displaypath$revname"
1250                 else
1251                         if test -z "$cached"
1252                         then
1253                                 sha1=$(clear_local_git_env; cd "$sm_path" && git rev-parse --verify HEAD)
1254                         fi
1255                         set_name_rev "$sm_path" "$sha1"
1256                         say "+$sha1 $displaypath$revname"
1257                 fi
1258
1259                 if test -n "$recursive"
1260                 then
1261                         (
1262                                 prefix="$displaypath/"
1263                                 clear_local_git_env
1264                                 cd "$sm_path" &&
1265                                 eval cmd_status
1266                         ) ||
1267                         die "$(eval_gettext "Failed to recurse into submodule path '\$sm_path'")"
1268                 fi
1269         done
1270 }
1271 #
1272 # Sync remote urls for submodules
1273 # This makes the value for remote.$remote.url match the value
1274 # specified in .gitmodules.
1275 #
1276 cmd_sync()
1277 {
1278         while test $# -ne 0
1279         do
1280                 case "$1" in
1281                 -q|--quiet)
1282                         GIT_QUIET=1
1283                         shift
1284                         ;;
1285                 --recursive)
1286                         recursive=1
1287                         shift
1288                         ;;
1289                 --)
1290                         shift
1291                         break
1292                         ;;
1293                 -*)
1294                         usage
1295                         ;;
1296                 *)
1297                         break
1298                         ;;
1299                 esac
1300         done
1301         cd_to_toplevel
1302         module_list "$@" |
1303         while read mode sha1 stage sm_path
1304         do
1305                 die_if_unmatched "$mode"
1306                 name=$(module_name "$sm_path")
1307                 url=$(git config -f .gitmodules --get submodule."$name".url)
1308
1309                 # Possibly a url relative to parent
1310                 case "$url" in
1311                 ./*|../*)
1312                         # rewrite foo/bar as ../.. to find path from
1313                         # submodule work tree to superproject work tree
1314                         up_path="$(printf '%s\n' "$sm_path" | sed "s/[^/][^/]*/../g")" &&
1315                         # guarantee a trailing /
1316                         up_path=${up_path%/}/ &&
1317                         # path from submodule work tree to submodule origin repo
1318                         sub_origin_url=$(resolve_relative_url "$url" "$up_path") &&
1319                         # path from superproject work tree to submodule origin repo
1320                         super_config_url=$(resolve_relative_url "$url") || exit
1321                         ;;
1322                 *)
1323                         sub_origin_url="$url"
1324                         super_config_url="$url"
1325                         ;;
1326                 esac
1327
1328                 if git config "submodule.$name.url" >/dev/null 2>/dev/null
1329                 then
1330                         displaypath=$(relative_path "$prefix$sm_path")
1331                         say "$(eval_gettext "Synchronizing submodule url for '\$displaypath'")"
1332                         git config submodule."$name".url "$super_config_url"
1333
1334                         if test -e "$sm_path"/.git
1335                         then
1336                         (
1337                                 clear_local_git_env
1338                                 cd "$sm_path"
1339                                 remote=$(get_default_remote)
1340                                 git config remote."$remote".url "$sub_origin_url"
1341
1342                                 if test -n "$recursive"
1343                                 then
1344                                         prefix="$prefix$sm_path/"
1345                                         eval cmd_sync
1346                                 fi
1347                         )
1348                         fi
1349                 fi
1350         done
1351 }
1352
1353 # This loop parses the command line arguments to find the
1354 # subcommand name to dispatch.  Parsing of the subcommand specific
1355 # options are primarily done by the subcommand implementations.
1356 # Subcommand specific options such as --branch and --cached are
1357 # parsed here as well, for backward compatibility.
1358
1359 while test $# != 0 && test -z "$command"
1360 do
1361         case "$1" in
1362         add | foreach | init | deinit | update | status | summary | sync)
1363                 command=$1
1364                 ;;
1365         -q|--quiet)
1366                 GIT_QUIET=1
1367                 ;;
1368         -b|--branch)
1369                 case "$2" in
1370                 '')
1371                         usage
1372                         ;;
1373                 esac
1374                 branch="$2"; shift
1375                 ;;
1376         --cached)
1377                 cached="$1"
1378                 ;;
1379         --)
1380                 break
1381                 ;;
1382         -*)
1383                 usage
1384                 ;;
1385         *)
1386                 break
1387                 ;;
1388         esac
1389         shift
1390 done
1391
1392 # No command word defaults to "status"
1393 if test -z "$command"
1394 then
1395     if test $# = 0
1396     then
1397         command=status
1398     else
1399         usage
1400     fi
1401 fi
1402
1403 # "-b branch" is accepted only by "add"
1404 if test -n "$branch" && test "$command" != add
1405 then
1406         usage
1407 fi
1408
1409 # "--cached" is accepted only by "status" and "summary"
1410 if test -n "$cached" && test "$command" != status && test "$command" != summary
1411 then
1412         usage
1413 fi
1414
1415 "cmd_$command" "$@"