Merge branch 'ml/filter-branch-no-op-error'
[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 "$force" &&
217                 ! git add --dry-run --ignore-missing --no-warn-embedded-repo "$sm_path" > /dev/null 2>&1
218         then
219                 eval_gettextln "The following path is ignored by one of your .gitignore files:
220 \$sm_path
221 Use -f if you really want to add it." >&2
222                 exit 1
223         fi
224
225         if test -n "$custom_name"
226         then
227                 sm_name="$custom_name"
228         else
229                 sm_name="$sm_path"
230         fi
231
232         # perhaps the path exists and is already a git repo, else clone it
233         if test -e "$sm_path"
234         then
235                 if test -d "$sm_path"/.git || test -f "$sm_path"/.git
236                 then
237                         eval_gettextln "Adding existing repo at '\$sm_path' to the index"
238                 else
239                         die "$(eval_gettext "'\$sm_path' already exists and is not a valid git repo")"
240                 fi
241
242         else
243                 if test -d ".git/modules/$sm_name"
244                 then
245                         if test -z "$force"
246                         then
247                                 eval_gettextln >&2 "A git directory for '\$sm_name' is found locally with remote(s):"
248                                 GIT_DIR=".git/modules/$sm_name" GIT_WORK_TREE=. git remote -v | grep '(fetch)' | sed -e s,^,"  ", -e s,' (fetch)',, >&2
249                                 die "$(eval_gettextln "\
250 If you want to reuse this local git directory instead of cloning again from
251   \$realrepo
252 use the '--force' option. If the local git directory is not the correct repo
253 or you are unsure what this means choose another name with the '--name' option.")"
254                         else
255                                 eval_gettextln "Reactivating local git directory for submodule '\$sm_name'."
256                         fi
257                 fi
258                 git submodule--helper clone ${GIT_QUIET:+--quiet} --prefix "$wt_prefix" --path "$sm_path" --name "$sm_name" --url "$realrepo" ${reference:+"$reference"} ${depth:+"$depth"} || exit
259                 (
260                         sanitize_submodule_env
261                         cd "$sm_path" &&
262                         # ash fails to wordsplit ${branch:+-b "$branch"...}
263                         case "$branch" in
264                         '') git checkout -f -q ;;
265                         ?*) git checkout -f -q -B "$branch" "origin/$branch" ;;
266                         esac
267                 ) || die "$(eval_gettext "Unable to checkout submodule '\$sm_path'")"
268         fi
269         git config submodule."$sm_name".url "$realrepo"
270
271         git add --no-warn-embedded-repo $force "$sm_path" ||
272         die "$(eval_gettext "Failed to add submodule '\$sm_path'")"
273
274         git config -f .gitmodules submodule."$sm_name".path "$sm_path" &&
275         git config -f .gitmodules submodule."$sm_name".url "$repo" &&
276         if test -n "$branch"
277         then
278                 git config -f .gitmodules submodule."$sm_name".branch "$branch"
279         fi &&
280         git add --force .gitmodules ||
281         die "$(eval_gettext "Failed to register submodule '\$sm_path'")"
282
283         # NEEDSWORK: In a multi-working-tree world, this needs to be
284         # set in the per-worktree config.
285         if git config --get submodule.active >/dev/null
286         then
287                 # If the submodule being adding isn't already covered by the
288                 # current configured pathspec, set the submodule's active flag
289                 if ! git submodule--helper is-active "$sm_path"
290                 then
291                         git config submodule."$sm_name".active "true"
292                 fi
293         else
294                 git config submodule."$sm_name".active "true"
295         fi
296 }
297
298 #
299 # Execute an arbitrary command sequence in each checked out
300 # submodule
301 #
302 # $@ = command to execute
303 #
304 cmd_foreach()
305 {
306         # parse $args after "submodule ... foreach".
307         while test $# -ne 0
308         do
309                 case "$1" in
310                 -q|--quiet)
311                         GIT_QUIET=1
312                         ;;
313                 --recursive)
314                         recursive=1
315                         ;;
316                 -*)
317                         usage
318                         ;;
319                 *)
320                         break
321                         ;;
322                 esac
323                 shift
324         done
325
326         toplevel=$(pwd)
327
328         # dup stdin so that it can be restored when running the external
329         # command in the subshell (and a recursive call to this function)
330         exec 3<&0
331
332         {
333                 git submodule--helper list --prefix "$wt_prefix" ||
334                 echo "#unmatched" $?
335         } |
336         while read -r mode sha1 stage sm_path
337         do
338                 die_if_unmatched "$mode" "$sha1"
339                 if test -e "$sm_path"/.git
340                 then
341                         displaypath=$(git submodule--helper relative-path "$prefix$sm_path" "$wt_prefix")
342                         say "$(eval_gettext "Entering '\$displaypath'")"
343                         name=$(git submodule--helper name "$sm_path")
344                         (
345                                 prefix="$prefix$sm_path/"
346                                 sanitize_submodule_env
347                                 cd "$sm_path" &&
348                                 sm_path=$(git submodule--helper relative-path "$sm_path" "$wt_prefix") &&
349                                 # we make $path available to scripts ...
350                                 path=$sm_path &&
351                                 if test $# -eq 1
352                                 then
353                                         eval "$1"
354                                 else
355                                         "$@"
356                                 fi &&
357                                 if test -n "$recursive"
358                                 then
359                                         cmd_foreach "--recursive" "$@"
360                                 fi
361                         ) <&3 3<&- ||
362                         die "$(eval_gettext "Stopping at '\$displaypath'; script returned non-zero status.")"
363                 fi
364         done
365 }
366
367 #
368 # Register submodules in .git/config
369 #
370 # $@ = requested paths (default to all)
371 #
372 cmd_init()
373 {
374         # parse $args after "submodule ... init".
375         while test $# -ne 0
376         do
377                 case "$1" in
378                 -q|--quiet)
379                         GIT_QUIET=1
380                         ;;
381                 --)
382                         shift
383                         break
384                         ;;
385                 -*)
386                         usage
387                         ;;
388                 *)
389                         break
390                         ;;
391                 esac
392                 shift
393         done
394
395         git ${wt_prefix:+-C "$wt_prefix"} ${prefix:+--super-prefix "$prefix"} submodule--helper init ${GIT_QUIET:+--quiet}  "$@"
396 }
397
398 #
399 # Unregister submodules from .git/config and remove their work tree
400 #
401 cmd_deinit()
402 {
403         # parse $args after "submodule ... deinit".
404         deinit_all=
405         while test $# -ne 0
406         do
407                 case "$1" in
408                 -f|--force)
409                         force=$1
410                         ;;
411                 -q|--quiet)
412                         GIT_QUIET=1
413                         ;;
414                 --all)
415                         deinit_all=t
416                         ;;
417                 --)
418                         shift
419                         break
420                         ;;
421                 -*)
422                         usage
423                         ;;
424                 *)
425                         break
426                         ;;
427                 esac
428                 shift
429         done
430
431         git ${wt_prefix:+-C "$wt_prefix"} submodule--helper deinit ${GIT_QUIET:+--quiet} ${prefix:+--prefix "$prefix"} ${force:+--force} ${deinit_all:+--all} "$@"
432 }
433
434 is_tip_reachable () (
435         sanitize_submodule_env &&
436         cd "$1" &&
437         rev=$(git rev-list -n 1 "$2" --not --all 2>/dev/null) &&
438         test -z "$rev"
439 )
440
441 fetch_in_submodule () (
442         sanitize_submodule_env &&
443         cd "$1" &&
444         case "$2" in
445         '')
446                 git fetch ;;
447         *)
448                 shift
449                 git fetch $(get_default_remote) "$@" ;;
450         esac
451 )
452
453 #
454 # Update each submodule path to correct revision, using clone and checkout as needed
455 #
456 # $@ = requested paths (default to all)
457 #
458 cmd_update()
459 {
460         # parse $args after "submodule ... update".
461         while test $# -ne 0
462         do
463                 case "$1" in
464                 -q|--quiet)
465                         GIT_QUIET=1
466                         ;;
467                 --progress)
468                         progress="--progress"
469                         ;;
470                 -i|--init)
471                         init=1
472                         ;;
473                 --remote)
474                         remote=1
475                         ;;
476                 -N|--no-fetch)
477                         nofetch=1
478                         ;;
479                 -f|--force)
480                         force=$1
481                         ;;
482                 -r|--rebase)
483                         update="rebase"
484                         ;;
485                 --reference)
486                         case "$2" in '') usage ;; esac
487                         reference="--reference=$2"
488                         shift
489                         ;;
490                 --reference=*)
491                         reference="$1"
492                         ;;
493                 -m|--merge)
494                         update="merge"
495                         ;;
496                 --recursive)
497                         recursive=1
498                         ;;
499                 --checkout)
500                         update="checkout"
501                         ;;
502                 --recommend-shallow)
503                         recommend_shallow="--recommend-shallow"
504                         ;;
505                 --no-recommend-shallow)
506                         recommend_shallow="--no-recommend-shallow"
507                         ;;
508                 --depth)
509                         case "$2" in '') usage ;; esac
510                         depth="--depth=$2"
511                         shift
512                         ;;
513                 --depth=*)
514                         depth=$1
515                         ;;
516                 -j|--jobs)
517                         case "$2" in '') usage ;; esac
518                         jobs="--jobs=$2"
519                         shift
520                         ;;
521                 --jobs=*)
522                         jobs=$1
523                         ;;
524                 --)
525                         shift
526                         break
527                         ;;
528                 -*)
529                         usage
530                         ;;
531                 *)
532                         break
533                         ;;
534                 esac
535                 shift
536         done
537
538         if test -n "$init"
539         then
540                 cmd_init "--" "$@" || return
541         fi
542
543         {
544         git submodule--helper update-clone ${GIT_QUIET:+--quiet} \
545                 ${progress:+"$progress"} \
546                 ${wt_prefix:+--prefix "$wt_prefix"} \
547                 ${prefix:+--recursive-prefix "$prefix"} \
548                 ${update:+--update "$update"} \
549                 ${reference:+"$reference"} \
550                 ${depth:+--depth "$depth"} \
551                 ${recommend_shallow:+"$recommend_shallow"} \
552                 ${jobs:+$jobs} \
553                 "$@" || echo "#unmatched" $?
554         } | {
555         err=
556         while read -r mode sha1 stage just_cloned sm_path
557         do
558                 die_if_unmatched "$mode" "$sha1"
559
560                 name=$(git submodule--helper name "$sm_path") || exit
561                 if ! test -z "$update"
562                 then
563                         update_module=$update
564                 else
565                         update_module=$(git config submodule."$name".update)
566                         if test -z "$update_module"
567                         then
568                                 update_module="checkout"
569                         fi
570                 fi
571
572                 displaypath=$(git submodule--helper relative-path "$prefix$sm_path" "$wt_prefix")
573
574                 if test $just_cloned -eq 1
575                 then
576                         subsha1=
577                         case "$update_module" in
578                         merge | rebase | none)
579                                 update_module=checkout ;;
580                         esac
581                 else
582                         subsha1=$(sanitize_submodule_env; cd "$sm_path" &&
583                                 git rev-parse --verify HEAD) ||
584                         die "$(eval_gettext "Unable to find current revision in submodule path '\$displaypath'")"
585                 fi
586
587                 if test -n "$remote"
588                 then
589                         branch=$(git submodule--helper remote-branch "$sm_path")
590                         if test -z "$nofetch"
591                         then
592                                 # Fetch remote before determining tracking $sha1
593                                 fetch_in_submodule "$sm_path" $depth ||
594                                 die "$(eval_gettext "Unable to fetch in submodule path '\$sm_path'")"
595                         fi
596                         remote_name=$(sanitize_submodule_env; cd "$sm_path" && get_default_remote)
597                         sha1=$(sanitize_submodule_env; cd "$sm_path" &&
598                                 git rev-parse --verify "${remote_name}/${branch}") ||
599                         die "$(eval_gettext "Unable to find current \${remote_name}/\${branch} revision in submodule path '\$sm_path'")"
600                 fi
601
602                 if test "$subsha1" != "$sha1" || test -n "$force"
603                 then
604                         subforce=$force
605                         # If we don't already have a -f flag and the submodule has never been checked out
606                         if test -z "$subsha1" && test -z "$force"
607                         then
608                                 subforce="-f"
609                         fi
610
611                         if test -z "$nofetch"
612                         then
613                                 # Run fetch only if $sha1 isn't present or it
614                                 # is not reachable from a ref.
615                                 is_tip_reachable "$sm_path" "$sha1" ||
616                                 fetch_in_submodule "$sm_path" $depth ||
617                                 die "$(eval_gettext "Unable to fetch in submodule path '\$displaypath'")"
618
619                                 # Now we tried the usual fetch, but $sha1 may
620                                 # not be reachable from any of the refs
621                                 is_tip_reachable "$sm_path" "$sha1" ||
622                                 fetch_in_submodule "$sm_path" $depth "$sha1" ||
623                                 die "$(eval_gettext "Fetched in submodule path '\$displaypath', but it did not contain \$sha1. Direct fetching of that commit failed.")"
624                         fi
625
626                         must_die_on_failure=
627                         case "$update_module" in
628                         checkout)
629                                 command="git checkout $subforce -q"
630                                 die_msg="$(eval_gettext "Unable to checkout '\$sha1' in submodule path '\$displaypath'")"
631                                 say_msg="$(eval_gettext "Submodule path '\$displaypath': checked out '\$sha1'")"
632                                 ;;
633                         rebase)
634                                 command="git rebase"
635                                 die_msg="$(eval_gettext "Unable to rebase '\$sha1' in submodule path '\$displaypath'")"
636                                 say_msg="$(eval_gettext "Submodule path '\$displaypath': rebased into '\$sha1'")"
637                                 must_die_on_failure=yes
638                                 ;;
639                         merge)
640                                 command="git merge"
641                                 die_msg="$(eval_gettext "Unable to merge '\$sha1' in submodule path '\$displaypath'")"
642                                 say_msg="$(eval_gettext "Submodule path '\$displaypath': merged in '\$sha1'")"
643                                 must_die_on_failure=yes
644                                 ;;
645                         !*)
646                                 command="${update_module#!}"
647                                 die_msg="$(eval_gettext "Execution of '\$command \$sha1' failed in submodule path '\$displaypath'")"
648                                 say_msg="$(eval_gettext "Submodule path '\$displaypath': '\$command \$sha1'")"
649                                 must_die_on_failure=yes
650                                 ;;
651                         *)
652                                 die "$(eval_gettext "Invalid update mode '$update_module' for submodule '$name'")"
653                         esac
654
655                         if (sanitize_submodule_env; cd "$sm_path" && $command "$sha1")
656                         then
657                                 say "$say_msg"
658                         elif test -n "$must_die_on_failure"
659                         then
660                                 die_with_status 2 "$die_msg"
661                         else
662                                 err="${err};$die_msg"
663                                 continue
664                         fi
665                 fi
666
667                 if test -n "$recursive"
668                 then
669                         (
670                                 prefix=$(git submodule--helper relative-path "$prefix$sm_path/" "$wt_prefix")
671                                 wt_prefix=
672                                 sanitize_submodule_env
673                                 cd "$sm_path" &&
674                                 eval cmd_update
675                         )
676                         res=$?
677                         if test $res -gt 0
678                         then
679                                 die_msg="$(eval_gettext "Failed to recurse into submodule path '\$displaypath'")"
680                                 if test $res -ne 2
681                                 then
682                                         err="${err};$die_msg"
683                                         continue
684                                 else
685                                         die_with_status $res "$die_msg"
686                                 fi
687                         fi
688                 fi
689         done
690
691         if test -n "$err"
692         then
693                 OIFS=$IFS
694                 IFS=';'
695                 for e in $err
696                 do
697                         if test -n "$e"
698                         then
699                                 echo >&2 "$e"
700                         fi
701                 done
702                 IFS=$OIFS
703                 exit 1
704         fi
705         }
706 }
707
708 #
709 # Show commit summary for submodules in index or working tree
710 #
711 # If '--cached' is given, show summary between index and given commit,
712 # or between working tree and given commit
713 #
714 # $@ = [commit (default 'HEAD'),] requested paths (default all)
715 #
716 cmd_summary() {
717         summary_limit=-1
718         for_status=
719         diff_cmd=diff-index
720
721         # parse $args after "submodule ... summary".
722         while test $# -ne 0
723         do
724                 case "$1" in
725                 --cached)
726                         cached="$1"
727                         ;;
728                 --files)
729                         files="$1"
730                         ;;
731                 --for-status)
732                         for_status="$1"
733                         ;;
734                 -n|--summary-limit)
735                         summary_limit="$2"
736                         isnumber "$summary_limit" || usage
737                         shift
738                         ;;
739                 --summary-limit=*)
740                         summary_limit="${1#--summary-limit=}"
741                         isnumber "$summary_limit" || usage
742                         ;;
743                 --)
744                         shift
745                         break
746                         ;;
747                 -*)
748                         usage
749                         ;;
750                 *)
751                         break
752                         ;;
753                 esac
754                 shift
755         done
756
757         test $summary_limit = 0 && return
758
759         if rev=$(git rev-parse -q --verify --default HEAD ${1+"$1"})
760         then
761                 head=$rev
762                 test $# = 0 || shift
763         elif test -z "$1" || test "$1" = "HEAD"
764         then
765                 # before the first commit: compare with an empty tree
766                 head=$(git hash-object -w -t tree --stdin </dev/null)
767                 test -z "$1" || shift
768         else
769                 head="HEAD"
770         fi
771
772         if [ -n "$files" ]
773         then
774                 test -n "$cached" &&
775                 die "$(gettext "The --cached option cannot be used with the --files option")"
776                 diff_cmd=diff-files
777                 head=
778         fi
779
780         cd_to_toplevel
781         eval "set $(git rev-parse --sq --prefix "$wt_prefix" -- "$@")"
782         # Get modified modules cared by user
783         modules=$(git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- "$@" |
784                 sane_egrep '^:([0-7]* )?160000' |
785                 while read -r mod_src mod_dst sha1_src sha1_dst status sm_path
786                 do
787                         # Always show modules deleted or type-changed (blob<->module)
788                         if test "$status" = D || test "$status" = T
789                         then
790                                 printf '%s\n' "$sm_path"
791                                 continue
792                         fi
793                         # Respect the ignore setting for --for-status.
794                         if test -n "$for_status"
795                         then
796                                 name=$(git submodule--helper name "$sm_path")
797                                 ignore_config=$(get_submodule_config "$name" ignore none)
798                                 test $status != A && test $ignore_config = all && continue
799                         fi
800                         # Also show added or modified modules which are checked out
801                         GIT_DIR="$sm_path/.git" git rev-parse --git-dir >/dev/null 2>&1 &&
802                         printf '%s\n' "$sm_path"
803                 done
804         )
805
806         test -z "$modules" && return
807
808         git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- $modules |
809         sane_egrep '^:([0-7]* )?160000' |
810         cut -c2- |
811         while read -r mod_src mod_dst sha1_src sha1_dst status name
812         do
813                 if test -z "$cached" &&
814                         test $sha1_dst = 0000000000000000000000000000000000000000
815                 then
816                         case "$mod_dst" in
817                         160000)
818                                 sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
819                                 ;;
820                         100644 | 100755 | 120000)
821                                 sha1_dst=$(git hash-object $name)
822                                 ;;
823                         000000)
824                                 ;; # removed
825                         *)
826                                 # unexpected type
827                                 eval_gettextln "unexpected mode \$mod_dst" >&2
828                                 continue ;;
829                         esac
830                 fi
831                 missing_src=
832                 missing_dst=
833
834                 test $mod_src = 160000 &&
835                 ! GIT_DIR="$name/.git" git rev-parse -q --verify $sha1_src^0 >/dev/null &&
836                 missing_src=t
837
838                 test $mod_dst = 160000 &&
839                 ! GIT_DIR="$name/.git" git rev-parse -q --verify $sha1_dst^0 >/dev/null &&
840                 missing_dst=t
841
842                 display_name=$(git submodule--helper relative-path "$name" "$wt_prefix")
843
844                 total_commits=
845                 case "$missing_src,$missing_dst" in
846                 t,)
847                         errmsg="$(eval_gettext "  Warn: \$display_name doesn't contain commit \$sha1_src")"
848                         ;;
849                 ,t)
850                         errmsg="$(eval_gettext "  Warn: \$display_name doesn't contain commit \$sha1_dst")"
851                         ;;
852                 t,t)
853                         errmsg="$(eval_gettext "  Warn: \$display_name doesn't contain commits \$sha1_src and \$sha1_dst")"
854                         ;;
855                 *)
856                         errmsg=
857                         total_commits=$(
858                         if test $mod_src = 160000 && test $mod_dst = 160000
859                         then
860                                 range="$sha1_src...$sha1_dst"
861                         elif test $mod_src = 160000
862                         then
863                                 range=$sha1_src
864                         else
865                                 range=$sha1_dst
866                         fi
867                         GIT_DIR="$name/.git" \
868                         git rev-list --first-parent $range -- | wc -l
869                         )
870                         total_commits=" ($(($total_commits + 0)))"
871                         ;;
872                 esac
873
874                 sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
875                 sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
876                 if test $status = T
877                 then
878                         blob="$(gettext "blob")"
879                         submodule="$(gettext "submodule")"
880                         if test $mod_dst = 160000
881                         then
882                                 echo "* $display_name $sha1_abbr_src($blob)->$sha1_abbr_dst($submodule)$total_commits:"
883                         else
884                                 echo "* $display_name $sha1_abbr_src($submodule)->$sha1_abbr_dst($blob)$total_commits:"
885                         fi
886                 else
887                         echo "* $display_name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
888                 fi
889                 if test -n "$errmsg"
890                 then
891                         # Don't give error msg for modification whose dst is not submodule
892                         # i.e. deleted or changed to blob
893                         test $mod_dst = 160000 && echo "$errmsg"
894                 else
895                         if test $mod_src = 160000 && test $mod_dst = 160000
896                         then
897                                 limit=
898                                 test $summary_limit -gt 0 && limit="-$summary_limit"
899                                 GIT_DIR="$name/.git" \
900                                 git log $limit --pretty='format:  %m %s' \
901                                 --first-parent $sha1_src...$sha1_dst
902                         elif test $mod_dst = 160000
903                         then
904                                 GIT_DIR="$name/.git" \
905                                 git log --pretty='format:  > %s' -1 $sha1_dst
906                         else
907                                 GIT_DIR="$name/.git" \
908                                 git log --pretty='format:  < %s' -1 $sha1_src
909                         fi
910                         echo
911                 fi
912                 echo
913         done
914 }
915 #
916 # List all submodules, prefixed with:
917 #  - submodule not initialized
918 #  + different revision checked out
919 #
920 # If --cached was specified the revision in the index will be printed
921 # instead of the currently checked out revision.
922 #
923 # $@ = requested paths (default to all)
924 #
925 cmd_status()
926 {
927         # parse $args after "submodule ... status".
928         while test $# -ne 0
929         do
930                 case "$1" in
931                 -q|--quiet)
932                         GIT_QUIET=1
933                         ;;
934                 --cached)
935                         cached=1
936                         ;;
937                 --recursive)
938                         recursive=1
939                         ;;
940                 --)
941                         shift
942                         break
943                         ;;
944                 -*)
945                         usage
946                         ;;
947                 *)
948                         break
949                         ;;
950                 esac
951                 shift
952         done
953
954         git ${wt_prefix:+-C "$wt_prefix"} ${prefix:+--super-prefix "$prefix"} submodule--helper status ${GIT_QUIET:+--quiet} ${cached:+--cached} ${recursive:+--recursive} "$@"
955 }
956 #
957 # Sync remote urls for submodules
958 # This makes the value for remote.$remote.url match the value
959 # specified in .gitmodules.
960 #
961 cmd_sync()
962 {
963         while test $# -ne 0
964         do
965                 case "$1" in
966                 -q|--quiet)
967                         GIT_QUIET=1
968                         shift
969                         ;;
970                 --recursive)
971                         recursive=1
972                         shift
973                         ;;
974                 --)
975                         shift
976                         break
977                         ;;
978                 -*)
979                         usage
980                         ;;
981                 *)
982                         break
983                         ;;
984                 esac
985         done
986
987         git ${wt_prefix:+-C "$wt_prefix"} ${prefix:+--super-prefix "$prefix"} submodule--helper sync ${GIT_QUIET:+--quiet} ${recursive:+--recursive} "$@"
988 }
989
990 cmd_absorbgitdirs()
991 {
992         git submodule--helper absorb-git-dirs --prefix "$wt_prefix" "$@"
993 }
994
995 # This loop parses the command line arguments to find the
996 # subcommand name to dispatch.  Parsing of the subcommand specific
997 # options are primarily done by the subcommand implementations.
998 # Subcommand specific options such as --branch and --cached are
999 # parsed here as well, for backward compatibility.
1000
1001 while test $# != 0 && test -z "$command"
1002 do
1003         case "$1" in
1004         add | foreach | init | deinit | update | status | summary | sync | absorbgitdirs)
1005                 command=$1
1006                 ;;
1007         -q|--quiet)
1008                 GIT_QUIET=1
1009                 ;;
1010         -b|--branch)
1011                 case "$2" in
1012                 '')
1013                         usage
1014                         ;;
1015                 esac
1016                 branch="$2"; shift
1017                 ;;
1018         --cached)
1019                 cached="$1"
1020                 ;;
1021         --)
1022                 break
1023                 ;;
1024         -*)
1025                 usage
1026                 ;;
1027         *)
1028                 break
1029                 ;;
1030         esac
1031         shift
1032 done
1033
1034 # No command word defaults to "status"
1035 if test -z "$command"
1036 then
1037     if test $# = 0
1038     then
1039         command=status
1040     else
1041         usage
1042     fi
1043 fi
1044
1045 # "-b branch" is accepted only by "add"
1046 if test -n "$branch" && test "$command" != add
1047 then
1048         usage
1049 fi
1050
1051 # "--cached" is accepted only by "status" and "summary"
1052 if test -n "$cached" && test "$command" != status && test "$command" != summary
1053 then
1054         usage
1055 fi
1056
1057 "cmd_$command" "$@"