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