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