Merge branch 'jk/help-plug-memleak'
[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] [--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: $dashless [--quiet] sync [--] [<path>...]"
15 OPTIONS_SPEC=
16 . git-sh-setup
17 . git-sh-i18n
18 . git-parse-remote
19 require_work_tree
20
21 command=
22 branch=
23 force=
24 reference=
25 cached=
26 recursive=
27 init=
28 files=
29 nofetch=
30 update=
31 prefix=
32
33 # The function takes at most 2 arguments. The first argument is the
34 # URL that navigates to the submodule origin repo. When relative, this URL
35 # is relative to the superproject origin URL repo. The second up_path
36 # argument, if specified, is the relative path that navigates
37 # from the submodule working tree to the superproject working tree.
38 #
39 # The output of the function is the origin URL of the submodule.
40 #
41 # The output will either be an absolute URL or filesystem path (if the
42 # superproject origin URL is an absolute URL or filesystem path,
43 # respectively) or a relative file system path (if the superproject
44 # origin URL is a relative file system path).
45 #
46 # When the output is a relative file system path, the path is either
47 # relative to the submodule working tree, if up_path is specified, or to
48 # the superproject working tree otherwise.
49 resolve_relative_url ()
50 {
51         remote=$(get_default_remote)
52         remoteurl=$(git config "remote.$remote.url") ||
53                 remoteurl=$(pwd) # the repository is its own authoritative upstream
54         url="$1"
55         remoteurl=${remoteurl%/}
56         sep=/
57         up_path="$2"
58
59         case "$remoteurl" in
60         *:*|/*)
61                 is_relative=
62                 ;;
63         ./*|../*)
64                 is_relative=t
65                 ;;
66         *)
67                 is_relative=t
68                 remoteurl="./$remoteurl"
69                 ;;
70         esac
71
72         while test -n "$url"
73         do
74                 case "$url" in
75                 ../*)
76                         url="${url#../}"
77                         case "$remoteurl" in
78                         */*)
79                                 remoteurl="${remoteurl%/*}"
80                                 ;;
81                         *:*)
82                                 remoteurl="${remoteurl%:*}"
83                                 sep=:
84                                 ;;
85                         *)
86                                 if test -z "$is_relative" || test "." = "$remoteurl"
87                                 then
88                                         die "$(eval_gettext "cannot strip one component off url '\$remoteurl'")"
89                                 else
90                                         remoteurl=.
91                                 fi
92                                 ;;
93                         esac
94                         ;;
95                 ./*)
96                         url="${url#./}"
97                         ;;
98                 *)
99                         break;;
100                 esac
101         done
102         remoteurl="$remoteurl$sep${url%/}"
103         echo "${is_relative:+${up_path}}${remoteurl#./}"
104 }
105
106 #
107 # Get submodule info for registered submodules
108 # $@ = path to limit submodule list
109 #
110 module_list()
111 {
112         git ls-files --error-unmatch --stage -- "$@" |
113         perl -e '
114         my %unmerged = ();
115         my ($null_sha1) = ("0" x 40);
116         while (<STDIN>) {
117                 chomp;
118                 my ($mode, $sha1, $stage, $path) =
119                         /^([0-7]+) ([0-9a-f]{40}) ([0-3])\t(.*)$/;
120                 next unless $mode eq "160000";
121                 if ($stage ne "0") {
122                         if (!$unmerged{$path}++) {
123                                 print "$mode $null_sha1 U\t$path\n";
124                         }
125                         next;
126                 }
127                 print "$_\n";
128         }
129         '
130 }
131
132 #
133 # Map submodule path to submodule name
134 #
135 # $1 = path
136 #
137 module_name()
138 {
139         # Do we have "submodule.<something>.path = $1" defined in .gitmodules file?
140         sm_path="$1"
141         re=$(printf '%s\n' "$1" | sed -e 's/[].[^$\\*]/\\&/g')
142         name=$( git config -f .gitmodules --get-regexp '^submodule\..*\.path$' |
143                 sed -n -e 's|^submodule\.\(.*\)\.path '"$re"'$|\1|p' )
144         test -z "$name" &&
145         die "$(eval_gettext "No submodule mapping found in .gitmodules for path '\$sm_path'")"
146         echo "$name"
147 }
148
149 #
150 # Clone a submodule
151 #
152 # Prior to calling, cmd_update checks that a possibly existing
153 # path is not a git repository.
154 # Likewise, cmd_add checks that path does not exist at all,
155 # since it is the location of a new submodule.
156 #
157 module_clone()
158 {
159         sm_path=$1
160         url=$2
161         reference="$3"
162         quiet=
163         if test -n "$GIT_QUIET"
164         then
165                 quiet=-q
166         fi
167
168         gitdir=
169         gitdir_base=
170         name=$(module_name "$sm_path" 2>/dev/null)
171         test -n "$name" || name="$sm_path"
172         base_name=$(dirname "$name")
173
174         gitdir=$(git rev-parse --git-dir)
175         gitdir_base="$gitdir/modules/$base_name"
176         gitdir="$gitdir/modules/$name"
177
178         if test -d "$gitdir"
179         then
180                 mkdir -p "$sm_path"
181                 rm -f "$gitdir/index"
182         else
183                 mkdir -p "$gitdir_base"
184                 (
185                         clear_local_git_env
186                         git clone $quiet -n ${reference:+"$reference"} \
187                                 --separate-git-dir "$gitdir" "$url" "$sm_path"
188                 ) ||
189                 die "$(eval_gettext "Clone of '\$url' into submodule path '\$sm_path' failed")"
190         fi
191
192         # We already are at the root of the work tree but cd_to_toplevel will
193         # resolve any symlinks that might be present in $PWD
194         a=$(cd_to_toplevel && cd "$gitdir" && pwd)/
195         b=$(cd_to_toplevel && cd "$sm_path" && pwd)/
196         # normalize Windows-style absolute paths to POSIX-style absolute paths
197         case $a in [a-zA-Z]:/*) a=/${a%%:*}${a#*:} ;; esac
198         case $b in [a-zA-Z]:/*) b=/${b%%:*}${b#*:} ;; esac
199         # Remove all common leading directories after a sanity check
200         if test "${a#$b}" != "$a" || test "${b#$a}" != "$b"; then
201                 die "$(eval_gettext "Gitdir '\$a' is part of the submodule path '\$b' or vice versa")"
202         fi
203         while test "${a%%/*}" = "${b%%/*}"
204         do
205                 a=${a#*/}
206                 b=${b#*/}
207         done
208         # Now chop off the trailing '/'s that were added in the beginning
209         a=${a%/}
210         b=${b%/}
211
212         # Turn each leading "*/" component into "../"
213         rel=$(echo $b | sed -e 's|[^/][^/]*|..|g')
214         echo "gitdir: $rel/$a" >"$sm_path/.git"
215
216         rel=$(echo $a | sed -e 's|[^/][^/]*|..|g')
217         (clear_local_git_env; cd "$sm_path" && GIT_WORK_TREE=. git config core.worktree "$rel/$b")
218 }
219
220 #
221 # Add a new submodule to the working tree, .gitmodules and the index
222 #
223 # $@ = repo path
224 #
225 # optional branch is stored in global branch variable
226 #
227 cmd_add()
228 {
229         # parse $args after "submodule ... add".
230         while test $# -ne 0
231         do
232                 case "$1" in
233                 -b | --branch)
234                         case "$2" in '') usage ;; esac
235                         branch=$2
236                         shift
237                         ;;
238                 -f | --force)
239                         force=$1
240                         ;;
241                 -q|--quiet)
242                         GIT_QUIET=1
243                         ;;
244                 --reference)
245                         case "$2" in '') usage ;; esac
246                         reference="--reference=$2"
247                         shift
248                         ;;
249                 --reference=*)
250                         reference="$1"
251                         shift
252                         ;;
253                 --)
254                         shift
255                         break
256                         ;;
257                 -*)
258                         usage
259                         ;;
260                 *)
261                         break
262                         ;;
263                 esac
264                 shift
265         done
266
267         repo=$1
268         sm_path=$2
269
270         if test -z "$sm_path"; then
271                 sm_path=$(echo "$repo" |
272                         sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
273         fi
274
275         if test -z "$repo" -o -z "$sm_path"; then
276                 usage
277         fi
278
279         # assure repo is absolute or relative to parent
280         case "$repo" in
281         ./*|../*)
282                 # dereference source url relative to parent's url
283                 realrepo=$(resolve_relative_url "$repo") || exit
284                 ;;
285         *:*|/*)
286                 # absolute url
287                 realrepo=$repo
288                 ;;
289         *)
290                 die "$(eval_gettext "repo URL: '\$repo' must be absolute or begin with ./|../")"
291         ;;
292         esac
293
294         # normalize path:
295         # multiple //; leading ./; /./; /../; trailing /
296         sm_path=$(printf '%s/\n' "$sm_path" |
297                 sed -e '
298                         s|//*|/|g
299                         s|^\(\./\)*||
300                         s|/\./|/|g
301                         :start
302                         s|\([^/]*\)/\.\./||
303                         tstart
304                         s|/*$||
305                 ')
306         git ls-files --error-unmatch "$sm_path" > /dev/null 2>&1 &&
307         die "$(eval_gettext "'\$sm_path' already exists in the index")"
308
309         if test -z "$force" && ! git add --dry-run --ignore-missing "$sm_path" > /dev/null 2>&1
310         then
311                 eval_gettextln "The following path is ignored by one of your .gitignore files:
312 \$sm_path
313 Use -f if you really want to add it." >&2
314                 exit 1
315         fi
316
317         # perhaps the path exists and is already a git repo, else clone it
318         if test -e "$sm_path"
319         then
320                 if test -d "$sm_path"/.git -o -f "$sm_path"/.git
321                 then
322                         eval_gettextln "Adding existing repo at '\$sm_path' to the index"
323                 else
324                         die "$(eval_gettext "'\$sm_path' already exists and is not a valid git repo")"
325                 fi
326
327         else
328
329                 module_clone "$sm_path" "$realrepo" "$reference" || exit
330                 (
331                         clear_local_git_env
332                         cd "$sm_path" &&
333                         # ash fails to wordsplit ${branch:+-b "$branch"...}
334                         case "$branch" in
335                         '') git checkout -f -q ;;
336                         ?*) git checkout -f -q -B "$branch" "origin/$branch" ;;
337                         esac
338                 ) || die "$(eval_gettext "Unable to checkout submodule '\$sm_path'")"
339         fi
340         git config submodule."$sm_path".url "$realrepo"
341
342         git add $force "$sm_path" ||
343         die "$(eval_gettext "Failed to add submodule '\$sm_path'")"
344
345         git config -f .gitmodules submodule."$sm_path".path "$sm_path" &&
346         git config -f .gitmodules submodule."$sm_path".url "$repo" &&
347         git add --force .gitmodules ||
348         die "$(eval_gettext "Failed to register submodule '\$sm_path'")"
349 }
350
351 #
352 # Execute an arbitrary command sequence in each checked out
353 # submodule
354 #
355 # $@ = command to execute
356 #
357 cmd_foreach()
358 {
359         # parse $args after "submodule ... foreach".
360         while test $# -ne 0
361         do
362                 case "$1" in
363                 -q|--quiet)
364                         GIT_QUIET=1
365                         ;;
366                 --recursive)
367                         recursive=1
368                         ;;
369                 -*)
370                         usage
371                         ;;
372                 *)
373                         break
374                         ;;
375                 esac
376                 shift
377         done
378
379         toplevel=$(pwd)
380
381         # dup stdin so that it can be restored when running the external
382         # command in the subshell (and a recursive call to this function)
383         exec 3<&0
384
385         module_list |
386         while read mode sha1 stage sm_path
387         do
388                 if test -e "$sm_path"/.git
389                 then
390                         say "$(eval_gettext "Entering '\$prefix\$sm_path'")"
391                         name=$(module_name "$sm_path")
392                         (
393                                 prefix="$prefix$sm_path/"
394                                 clear_local_git_env
395                                 # we make $path available to scripts ...
396                                 path=$sm_path
397                                 cd "$sm_path" &&
398                                 eval "$@" &&
399                                 if test -n "$recursive"
400                                 then
401                                         cmd_foreach "--recursive" "$@"
402                                 fi
403                         ) <&3 3<&- ||
404                         die "$(eval_gettext "Stopping at '\$sm_path'; script returned non-zero status.")"
405                 fi
406         done
407 }
408
409 #
410 # Register submodules in .git/config
411 #
412 # $@ = requested paths (default to all)
413 #
414 cmd_init()
415 {
416         # parse $args after "submodule ... init".
417         while test $# -ne 0
418         do
419                 case "$1" in
420                 -q|--quiet)
421                         GIT_QUIET=1
422                         ;;
423                 --)
424                         shift
425                         break
426                         ;;
427                 -*)
428                         usage
429                         ;;
430                 *)
431                         break
432                         ;;
433                 esac
434                 shift
435         done
436
437         module_list "$@" |
438         while read mode sha1 stage sm_path
439         do
440                 name=$(module_name "$sm_path") || exit
441
442                 # Copy url setting when it is not set yet
443                 if test -z "$(git config "submodule.$name.url")"
444                 then
445                         url=$(git config -f .gitmodules submodule."$name".url)
446                         test -z "$url" &&
447                         die "$(eval_gettext "No url found for submodule path '\$sm_path' in .gitmodules")"
448
449                         # Possibly a url relative to parent
450                         case "$url" in
451                         ./*|../*)
452                                 url=$(resolve_relative_url "$url") || exit
453                                 ;;
454                         esac
455                         git config submodule."$name".url "$url" ||
456                         die "$(eval_gettext "Failed to register url for submodule path '\$sm_path'")"
457
458                         say "$(eval_gettext "Submodule '\$name' (\$url) registered for path '\$sm_path'")"
459                 fi
460
461                 # Copy "update" setting when it is not set yet
462                 upd="$(git config -f .gitmodules submodule."$name".update)"
463                 test -z "$upd" ||
464                 test -n "$(git config submodule."$name".update)" ||
465                 git config submodule."$name".update "$upd" ||
466                 die "$(eval_gettext "Failed to register update mode for submodule path '\$sm_path'")"
467         done
468 }
469
470 #
471 # Update each submodule path to correct revision, using clone and checkout as needed
472 #
473 # $@ = requested paths (default to all)
474 #
475 cmd_update()
476 {
477         # parse $args after "submodule ... update".
478         orig_flags=
479         while test $# -ne 0
480         do
481                 case "$1" in
482                 -q|--quiet)
483                         GIT_QUIET=1
484                         ;;
485                 -i|--init)
486                         init=1
487                         ;;
488                 -N|--no-fetch)
489                         nofetch=1
490                         ;;
491                 -f|--force)
492                         force=$1
493                         ;;
494                 -r|--rebase)
495                         update="rebase"
496                         ;;
497                 --reference)
498                         case "$2" in '') usage ;; esac
499                         reference="--reference=$2"
500                         orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
501                         shift
502                         ;;
503                 --reference=*)
504                         reference="$1"
505                         ;;
506                 -m|--merge)
507                         update="merge"
508                         ;;
509                 --recursive)
510                         recursive=1
511                         ;;
512                 --checkout)
513                         update="checkout"
514                         ;;
515                 --)
516                         shift
517                         break
518                         ;;
519                 -*)
520                         usage
521                         ;;
522                 *)
523                         break
524                         ;;
525                 esac
526                 orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
527                 shift
528         done
529
530         if test -n "$init"
531         then
532                 cmd_init "--" "$@" || return
533         fi
534
535         cloned_modules=
536         module_list "$@" | {
537         err=
538         while read mode sha1 stage sm_path
539         do
540                 if test "$stage" = U
541                 then
542                         echo >&2 "Skipping unmerged submodule $sm_path"
543                         continue
544                 fi
545                 name=$(module_name "$sm_path") || exit
546                 url=$(git config submodule."$name".url)
547                 if ! test -z "$update"
548                 then
549                         update_module=$update
550                 else
551                         update_module=$(git config submodule."$name".update)
552                 fi
553
554                 if test "$update_module" = "none"
555                 then
556                         echo "Skipping submodule '$sm_path'"
557                         continue
558                 fi
559
560                 if test -z "$url"
561                 then
562                         # Only mention uninitialized submodules when its
563                         # path have been specified
564                         test "$#" != "0" &&
565                         say "$(eval_gettext "Submodule path '\$sm_path' not initialized
566 Maybe you want to use 'update --init'?")"
567                         continue
568                 fi
569
570                 if ! test -d "$sm_path"/.git -o -f "$sm_path"/.git
571                 then
572                         module_clone "$sm_path" "$url" "$reference"|| exit
573                         cloned_modules="$cloned_modules;$name"
574                         subsha1=
575                 else
576                         subsha1=$(clear_local_git_env; cd "$sm_path" &&
577                                 git rev-parse --verify HEAD) ||
578                         die "$(eval_gettext "Unable to find current revision in submodule path '\$sm_path'")"
579                 fi
580
581                 if test "$subsha1" != "$sha1"
582                 then
583                         subforce=$force
584                         # If we don't already have a -f flag and the submodule has never been checked out
585                         if test -z "$subsha1" -a -z "$force"
586                         then
587                                 subforce="-f"
588                         fi
589
590                         if test -z "$nofetch"
591                         then
592                                 # Run fetch only if $sha1 isn't present or it
593                                 # is not reachable from a ref.
594                                 (clear_local_git_env; cd "$sm_path" &&
595                                         ( (rev=$(git rev-list -n 1 $sha1 --not --all 2>/dev/null) &&
596                                          test -z "$rev") || git-fetch)) ||
597                                 die "$(eval_gettext "Unable to fetch in submodule path '\$sm_path'")"
598                         fi
599
600                         # Is this something we just cloned?
601                         case ";$cloned_modules;" in
602                         *";$name;"*)
603                                 # then there is no local change to integrate
604                                 update_module= ;;
605                         esac
606
607                         must_die_on_failure=
608                         case "$update_module" in
609                         rebase)
610                                 command="git rebase"
611                                 die_msg="$(eval_gettext "Unable to rebase '\$sha1' in submodule path '\$sm_path'")"
612                                 say_msg="$(eval_gettext "Submodule path '\$sm_path': rebased into '\$sha1'")"
613                                 must_die_on_failure=yes
614                                 ;;
615                         merge)
616                                 command="git merge"
617                                 die_msg="$(eval_gettext "Unable to merge '\$sha1' in submodule path '\$sm_path'")"
618                                 say_msg="$(eval_gettext "Submodule path '\$sm_path': merged in '\$sha1'")"
619                                 must_die_on_failure=yes
620                                 ;;
621                         *)
622                                 command="git checkout $subforce -q"
623                                 die_msg="$(eval_gettext "Unable to checkout '\$sha1' in submodule path '\$sm_path'")"
624                                 say_msg="$(eval_gettext "Submodule path '\$sm_path': checked out '\$sha1'")"
625                                 ;;
626                         esac
627
628                         if (clear_local_git_env; cd "$sm_path" && $command "$sha1")
629                         then
630                                 say "$say_msg"
631                         elif test -n "$must_die_on_failure"
632                         then
633                                 die_with_status 2 "$die_msg"
634                         else
635                                 err="${err};$die_msg"
636                                 continue
637                         fi
638                 fi
639
640                 if test -n "$recursive"
641                 then
642                         (clear_local_git_env; cd "$sm_path" && eval cmd_update "$orig_flags")
643                         res=$?
644                         if test $res -gt 0
645                         then
646                                 die_msg="$(eval_gettext "Failed to recurse into submodule path '\$sm_path'")"
647                                 if test $res -eq 1
648                                 then
649                                         err="${err};$die_msg"
650                                         continue
651                                 else
652                                         die_with_status $res "$die_msg"
653                                 fi
654                         fi
655                 fi
656         done
657
658         if test -n "$err"
659         then
660                 OIFS=$IFS
661                 IFS=';'
662                 for e in $err
663                 do
664                         if test -n "$e"
665                         then
666                                 echo >&2 "$e"
667                         fi
668                 done
669                 IFS=$OIFS
670                 exit 1
671         fi
672         }
673 }
674
675 set_name_rev () {
676         revname=$( (
677                 clear_local_git_env
678                 cd "$1" && {
679                         git describe "$2" 2>/dev/null ||
680                         git describe --tags "$2" 2>/dev/null ||
681                         git describe --contains "$2" 2>/dev/null ||
682                         git describe --all --always "$2"
683                 }
684         ) )
685         test -z "$revname" || revname=" ($revname)"
686 }
687 #
688 # Show commit summary for submodules in index or working tree
689 #
690 # If '--cached' is given, show summary between index and given commit,
691 # or between working tree and given commit
692 #
693 # $@ = [commit (default 'HEAD'),] requested paths (default all)
694 #
695 cmd_summary() {
696         summary_limit=-1
697         for_status=
698         diff_cmd=diff-index
699
700         # parse $args after "submodule ... summary".
701         while test $# -ne 0
702         do
703                 case "$1" in
704                 --cached)
705                         cached="$1"
706                         ;;
707                 --files)
708                         files="$1"
709                         ;;
710                 --for-status)
711                         for_status="$1"
712                         ;;
713                 -n|--summary-limit)
714                         if summary_limit=$(($2 + 0)) 2>/dev/null && test "$summary_limit" = "$2"
715                         then
716                                 :
717                         else
718                                 usage
719                         fi
720                         shift
721                         ;;
722                 --)
723                         shift
724                         break
725                         ;;
726                 -*)
727                         usage
728                         ;;
729                 *)
730                         break
731                         ;;
732                 esac
733                 shift
734         done
735
736         test $summary_limit = 0 && return
737
738         if rev=$(git rev-parse -q --verify --default HEAD ${1+"$1"})
739         then
740                 head=$rev
741                 test $# = 0 || shift
742         elif test -z "$1" -o "$1" = "HEAD"
743         then
744                 # before the first commit: compare with an empty tree
745                 head=$(git hash-object -w -t tree --stdin </dev/null)
746                 test -z "$1" || shift
747         else
748                 head="HEAD"
749         fi
750
751         if [ -n "$files" ]
752         then
753                 test -n "$cached" &&
754                 die "$(gettext -- "--cached cannot be used with --files")"
755                 diff_cmd=diff-files
756                 head=
757         fi
758
759         cd_to_toplevel
760         # Get modified modules cared by user
761         modules=$(git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- "$@" |
762                 sane_egrep '^:([0-7]* )?160000' |
763                 while read mod_src mod_dst sha1_src sha1_dst status name
764                 do
765                         # Always show modules deleted or type-changed (blob<->module)
766                         test $status = D -o $status = T && echo "$name" && continue
767                         # Also show added or modified modules which are checked out
768                         GIT_DIR="$name/.git" git-rev-parse --git-dir >/dev/null 2>&1 &&
769                         echo "$name"
770                 done
771         )
772
773         test -z "$modules" && return
774
775         git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- $modules |
776         sane_egrep '^:([0-7]* )?160000' |
777         cut -c2- |
778         while read mod_src mod_dst sha1_src sha1_dst status name
779         do
780                 if test -z "$cached" &&
781                         test $sha1_dst = 0000000000000000000000000000000000000000
782                 then
783                         case "$mod_dst" in
784                         160000)
785                                 sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
786                                 ;;
787                         100644 | 100755 | 120000)
788                                 sha1_dst=$(git hash-object $name)
789                                 ;;
790                         000000)
791                                 ;; # removed
792                         *)
793                                 # unexpected type
794                                 eval_gettextln "unexpected mode \$mod_dst" >&2
795                                 continue ;;
796                         esac
797                 fi
798                 missing_src=
799                 missing_dst=
800
801                 test $mod_src = 160000 &&
802                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_src^0 >/dev/null &&
803                 missing_src=t
804
805                 test $mod_dst = 160000 &&
806                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_dst^0 >/dev/null &&
807                 missing_dst=t
808
809                 total_commits=
810                 case "$missing_src,$missing_dst" in
811                 t,)
812                         errmsg="$(eval_gettext "  Warn: \$name doesn't contain commit \$sha1_src")"
813                         ;;
814                 ,t)
815                         errmsg="$(eval_gettext "  Warn: \$name doesn't contain commit \$sha1_dst")"
816                         ;;
817                 t,t)
818                         errmsg="$(eval_gettext "  Warn: \$name doesn't contain commits \$sha1_src and \$sha1_dst")"
819                         ;;
820                 *)
821                         errmsg=
822                         total_commits=$(
823                         if test $mod_src = 160000 -a $mod_dst = 160000
824                         then
825                                 range="$sha1_src...$sha1_dst"
826                         elif test $mod_src = 160000
827                         then
828                                 range=$sha1_src
829                         else
830                                 range=$sha1_dst
831                         fi
832                         GIT_DIR="$name/.git" \
833                         git rev-list --first-parent $range -- | wc -l
834                         )
835                         total_commits=" ($(($total_commits + 0)))"
836                         ;;
837                 esac
838
839                 sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
840                 sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
841                 if test $status = T
842                 then
843                         blob="$(gettext "blob")"
844                         submodule="$(gettext "submodule")"
845                         if test $mod_dst = 160000
846                         then
847                                 echo "* $name $sha1_abbr_src($blob)->$sha1_abbr_dst($submodule)$total_commits:"
848                         else
849                                 echo "* $name $sha1_abbr_src($submodule)->$sha1_abbr_dst($blob)$total_commits:"
850                         fi
851                 else
852                         echo "* $name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
853                 fi
854                 if test -n "$errmsg"
855                 then
856                         # Don't give error msg for modification whose dst is not submodule
857                         # i.e. deleted or changed to blob
858                         test $mod_dst = 160000 && echo "$errmsg"
859                 else
860                         if test $mod_src = 160000 -a $mod_dst = 160000
861                         then
862                                 limit=
863                                 test $summary_limit -gt 0 && limit="-$summary_limit"
864                                 GIT_DIR="$name/.git" \
865                                 git log $limit --pretty='format:  %m %s' \
866                                 --first-parent $sha1_src...$sha1_dst
867                         elif test $mod_dst = 160000
868                         then
869                                 GIT_DIR="$name/.git" \
870                                 git log --pretty='format:  > %s' -1 $sha1_dst
871                         else
872                                 GIT_DIR="$name/.git" \
873                                 git log --pretty='format:  < %s' -1 $sha1_src
874                         fi
875                         echo
876                 fi
877                 echo
878         done |
879         if test -n "$for_status"; then
880                 if [ -n "$files" ]; then
881                         gettextln "# Submodules changed but not updated:"
882                 else
883                         gettextln "# Submodule changes to be committed:"
884                 fi
885                 echo "#"
886                 sed -e 's|^|# |' -e 's|^# $|#|'
887         else
888                 cat
889         fi
890 }
891 #
892 # List all submodules, prefixed with:
893 #  - submodule not initialized
894 #  + different revision checked out
895 #
896 # If --cached was specified the revision in the index will be printed
897 # instead of the currently checked out revision.
898 #
899 # $@ = requested paths (default to all)
900 #
901 cmd_status()
902 {
903         # parse $args after "submodule ... status".
904         orig_flags=
905         while test $# -ne 0
906         do
907                 case "$1" in
908                 -q|--quiet)
909                         GIT_QUIET=1
910                         ;;
911                 --cached)
912                         cached=1
913                         ;;
914                 --recursive)
915                         recursive=1
916                         ;;
917                 --)
918                         shift
919                         break
920                         ;;
921                 -*)
922                         usage
923                         ;;
924                 *)
925                         break
926                         ;;
927                 esac
928                 orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
929                 shift
930         done
931
932         module_list "$@" |
933         while read mode sha1 stage sm_path
934         do
935                 name=$(module_name "$sm_path") || exit
936                 url=$(git config submodule."$name".url)
937                 displaypath="$prefix$sm_path"
938                 if test "$stage" = U
939                 then
940                         say "U$sha1 $displaypath"
941                         continue
942                 fi
943                 if test -z "$url" || ! test -d "$sm_path"/.git -o -f "$sm_path"/.git
944                 then
945                         say "-$sha1 $displaypath"
946                         continue;
947                 fi
948                 set_name_rev "$sm_path" "$sha1"
949                 if git diff-files --ignore-submodules=dirty --quiet -- "$sm_path"
950                 then
951                         say " $sha1 $displaypath$revname"
952                 else
953                         if test -z "$cached"
954                         then
955                                 sha1=$(clear_local_git_env; cd "$sm_path" && git rev-parse --verify HEAD)
956                                 set_name_rev "$sm_path" "$sha1"
957                         fi
958                         say "+$sha1 $displaypath$revname"
959                 fi
960
961                 if test -n "$recursive"
962                 then
963                         (
964                                 prefix="$displaypath/"
965                                 clear_local_git_env
966                                 cd "$sm_path" &&
967                                 eval cmd_status "$orig_args"
968                         ) ||
969                         die "$(eval_gettext "Failed to recurse into submodule path '\$sm_path'")"
970                 fi
971         done
972 }
973 #
974 # Sync remote urls for submodules
975 # This makes the value for remote.$remote.url match the value
976 # specified in .gitmodules.
977 #
978 cmd_sync()
979 {
980         while test $# -ne 0
981         do
982                 case "$1" in
983                 -q|--quiet)
984                         GIT_QUIET=1
985                         shift
986                         ;;
987                 --)
988                         shift
989                         break
990                         ;;
991                 -*)
992                         usage
993                         ;;
994                 *)
995                         break
996                         ;;
997                 esac
998         done
999         cd_to_toplevel
1000         module_list "$@" |
1001         while read mode sha1 stage sm_path
1002         do
1003                 name=$(module_name "$sm_path")
1004                 url=$(git config -f .gitmodules --get submodule."$name".url)
1005
1006                 # Possibly a url relative to parent
1007                 case "$url" in
1008                 ./*|../*)
1009                         # rewrite foo/bar as ../.. to find path from
1010                         # submodule work tree to superproject work tree
1011                         up_path="$(echo "$sm_path" | sed "s/[^/][^/]*/../g")" &&
1012                         # guarantee a trailing /
1013                         up_path=${up_path%/}/ &&
1014                         # path from submodule work tree to submodule origin repo
1015                         sub_origin_url=$(resolve_relative_url "$url" "$up_path") &&
1016                         # path from superproject work tree to submodule origin repo
1017                         super_config_url=$(resolve_relative_url "$url") || exit
1018                         ;;
1019                 *)
1020                         sub_origin_url="$url"
1021                         super_config_url="$url"
1022                         ;;
1023                 esac
1024
1025                 if git config "submodule.$name.url" >/dev/null 2>/dev/null
1026                 then
1027                         say "$(eval_gettext "Synchronizing submodule url for '\$name'")"
1028                         git config submodule."$name".url "$super_config_url"
1029
1030                         if test -e "$sm_path"/.git
1031                         then
1032                         (
1033                                 clear_local_git_env
1034                                 cd "$sm_path"
1035                                 remote=$(get_default_remote)
1036                                 git config remote."$remote".url "$sub_origin_url"
1037                         )
1038                         fi
1039                 fi
1040         done
1041 }
1042
1043 # This loop parses the command line arguments to find the
1044 # subcommand name to dispatch.  Parsing of the subcommand specific
1045 # options are primarily done by the subcommand implementations.
1046 # Subcommand specific options such as --branch and --cached are
1047 # parsed here as well, for backward compatibility.
1048
1049 while test $# != 0 && test -z "$command"
1050 do
1051         case "$1" in
1052         add | foreach | init | update | status | summary | sync)
1053                 command=$1
1054                 ;;
1055         -q|--quiet)
1056                 GIT_QUIET=1
1057                 ;;
1058         -b|--branch)
1059                 case "$2" in
1060                 '')
1061                         usage
1062                         ;;
1063                 esac
1064                 branch="$2"; shift
1065                 ;;
1066         --cached)
1067                 cached="$1"
1068                 ;;
1069         --)
1070                 break
1071                 ;;
1072         -*)
1073                 usage
1074                 ;;
1075         *)
1076                 break
1077                 ;;
1078         esac
1079         shift
1080 done
1081
1082 # No command word defaults to "status"
1083 test -n "$command" || command=status
1084
1085 # "-b branch" is accepted only by "add"
1086 if test -n "$branch" && test "$command" != add
1087 then
1088         usage
1089 fi
1090
1091 # "--cached" is accepted only by "status" and "summary"
1092 if test -n "$cached" && test "$command" != status -a "$command" != summary
1093 then
1094         usage
1095 fi
1096
1097 "cmd_$command" "$@"