1#!/bin/sh
2#
3# git-submodules.sh: add, init, update or list git submodules
4#
5# Copyright (c) 2007 Lars Hjemli
6dashless=$(basename "$0" | sed -e 's/-/ /')
8USAGE="[--quiet] add [-b branch] [-f|--force] [--reference <repository>] [--] <repository> [<path>]
9 or: $dashless [--quiet] status [--cached] [--recursive] [--] [<path>...]
10 or: $dashless [--quiet] init [--] [<path>...]
11 or: $dashless [--quiet] update [--init] [-N|--no-fetch] [-f|--force] [--rebase] [--reference <repository>] [--merge] [--recursive] [--] [<path>...]
12 or: $dashless [--quiet] summary [--cached|--files] [--summary-limit <n>] [commit] [--] [<path>...]
13 or: $dashless [--quiet] foreach [--recursive] <command>
14 or: $dashless [--quiet] sync [--] [<path>...]"
15OPTIONS_SPEC=
16. git-sh-setup
17. git-parse-remote
18require_work_tree
19command=
21branch=
22force=
23reference=
24cached=
25recursive=
26init=
27files=
28nofetch=
29update=
30prefix=
31# Resolve relative url by appending to parent's url
33resolve_relative_url ()
34{
35 remote=$(get_default_remote)
36 remoteurl=$(git config "remote.$remote.url") ||
37 die "remote ($remote) does not have a url defined in .git/config"
38 url="$1"
39 remoteurl=${remoteurl%/}
40 sep=/
41 while test -n "$url"
42 do
43 case "$url" in
44 ../*)
45 url="${url#../}"
46 case "$remoteurl" in
47 */*)
48 remoteurl="${remoteurl%/*}"
49 ;;
50 *:*)
51 remoteurl="${remoteurl%:*}"
52 sep=:
53 ;;
54 *)
55 die "cannot strip one component off url '$remoteurl'"
56 ;;
57 esac
58 ;;
59 ./*)
60 url="${url#./}"
61 ;;
62 *)
63 break;;
64 esac
65 done
66 echo "$remoteurl$sep${url%/}"
67}
68#
70# Get submodule info for registered submodules
71# $@ = path to limit submodule list
72#
73module_list()
74{
75 git ls-files --error-unmatch --stage -- "$@" |
76 perl -e '
77 my %unmerged = ();
78 my ($null_sha1) = ("0" x 40);
79 while (<STDIN>) {
80 chomp;
81 my ($mode, $sha1, $stage, $path) =
82 /^([0-7]+) ([0-9a-f]{40}) ([0-3])\t(.*)$/;
83 next unless $mode eq "160000";
84 if ($stage ne "0") {
85 if (!$unmerged{$path}++) {
86 print "$mode $null_sha1 U\t$path\n";
87 }
88 next;
89 }
90 print "$_\n";
91 }
92 '
93}
94#
96# Map submodule path to submodule name
97#
98# $1 = path
99#
100module_name()
101{
102 # Do we have "submodule.<something>.path = $1" defined in .gitmodules file?
103 re=$(printf '%s\n' "$1" | sed -e 's/[].[^$\\*]/\\&/g')
104 name=$( git config -f .gitmodules --get-regexp '^submodule\..*\.path$' |
105 sed -n -e 's|^submodule\.\(.*\)\.path '"$re"'$|\1|p' )
106 test -z "$name" &&
107 die "No submodule mapping found in .gitmodules for path '$path'"
108 echo "$name"
109}
110#
112# Clone a submodule
113#
114# Prior to calling, cmd_update checks that a possibly existing
115# path is not a git repository.
116# Likewise, cmd_add checks that path does not exist at all,
117# since it is the location of a new submodule.
118#
119module_clone()
120{
121 path=$1
122 url=$2
123 reference="$3"
124 if test -n "$reference"
126 then
127 git-clone "$reference" -n "$url" "$path"
128 else
129 git-clone -n "$url" "$path"
130 fi ||
131 die "Clone of '$url' into submodule path '$path' failed"
132}
133#
135# Add a new submodule to the working tree, .gitmodules and the index
136#
137# $@ = repo path
138#
139# optional branch is stored in global branch variable
140#
141cmd_add()
142{
143 # parse $args after "submodule ... add".
144 while test $# -ne 0
145 do
146 case "$1" in
147 -b | --branch)
148 case "$2" in '') usage ;; esac
149 branch=$2
150 shift
151 ;;
152 -f | --force)
153 force=$1
154 ;;
155 -q|--quiet)
156 GIT_QUIET=1
157 ;;
158 --reference)
159 case "$2" in '') usage ;; esac
160 reference="--reference=$2"
161 shift
162 ;;
163 --reference=*)
164 reference="$1"
165 shift
166 ;;
167 --)
168 shift
169 break
170 ;;
171 -*)
172 usage
173 ;;
174 *)
175 break
176 ;;
177 esac
178 shift
179 done
180 repo=$1
182 path=$2
183 if test -z "$path"; then
185 path=$(echo "$repo" |
186 sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
187 fi
188 if test -z "$repo" -o -z "$path"; then
190 usage
191 fi
192 # assure repo is absolute or relative to parent
194 case "$repo" in
195 ./*|../*)
196 # dereference source url relative to parent's url
197 realrepo=$(resolve_relative_url "$repo") || exit
198 ;;
199 *:*|/*)
200 # absolute url
201 realrepo=$repo
202 ;;
203 *)
204 die "repo URL: '$repo' must be absolute or begin with ./|../"
205 ;;
206 esac
207 # normalize path:
209 # multiple //; leading ./; /./; /../; trailing /
210 path=$(printf '%s/\n' "$path" |
211 sed -e '
212 s|//*|/|g
213 s|^\(\./\)*||
214 s|/\./|/|g
215 :start
216 s|\([^/]*\)/\.\./||
217 tstart
218 s|/*$||
219 ')
220 git ls-files --error-unmatch "$path" > /dev/null 2>&1 &&
221 die "'$path' already exists in the index"
222 if test -z "$force" && ! git add --dry-run --ignore-missing "$path" > /dev/null 2>&1
224 then
225 echo >&2 "The following path is ignored by one of your .gitignore files:" &&
226 echo >&2 $path &&
227 echo >&2 "Use -f if you really want to add it."
228 exit 1
229 fi
230 # perhaps the path exists and is already a git repo, else clone it
232 if test -e "$path"
233 then
234 if test -d "$path"/.git -o -f "$path"/.git
235 then
236 echo "Adding existing repo at '$path' to the index"
237 else
238 die "'$path' already exists and is not a valid git repo"
239 fi
240 case "$repo" in
242 ./*|../*)
243 url=$(resolve_relative_url "$repo") || exit
244 ;;
245 *)
246 url="$repo"
247 ;;
248 esac
249 git config submodule."$path".url "$url"
250 else
251 module_clone "$path" "$realrepo" "$reference" || exit
253 (
254 clear_local_git_env
255 cd "$path" &&
256 # ash fails to wordsplit ${branch:+-b "$branch"...}
257 case "$branch" in
258 '') git checkout -f -q ;;
259 ?*) git checkout -f -q -B "$branch" "origin/$branch" ;;
260 esac
261 ) || die "Unable to checkout submodule '$path'"
262 fi
263 git add $force "$path" ||
265 die "Failed to add submodule '$path'"
266 git config -f .gitmodules submodule."$path".path "$path" &&
268 git config -f .gitmodules submodule."$path".url "$repo" &&
269 git add --force .gitmodules ||
270 die "Failed to register submodule '$path'"
271}
272#
274# Execute an arbitrary command sequence in each checked out
275# submodule
276#
277# $@ = command to execute
278#
279cmd_foreach()
280{
281 # parse $args after "submodule ... foreach".
282 while test $# -ne 0
283 do
284 case "$1" in
285 -q|--quiet)
286 GIT_QUIET=1
287 ;;
288 --recursive)
289 recursive=1
290 ;;
291 -*)
292 usage
293 ;;
294 *)
295 break
296 ;;
297 esac
298 shift
299 done
300 toplevel=$(pwd)
302 module_list |
304 while read mode sha1 stage path
305 do
306 if test -e "$path"/.git
307 then
308 say "Entering '$prefix$path'"
309 name=$(module_name "$path")
310 (
311 prefix="$prefix$path/"
312 clear_local_git_env
313 cd "$path" &&
314 eval "$@" &&
315 if test -n "$recursive"
316 then
317 cmd_foreach "--recursive" "$@"
318 fi
319 ) ||
320 die "Stopping at '$path'; script returned non-zero status."
321 fi
322 done
323}
324#
326# Register submodules in .git/config
327#
328# $@ = requested paths (default to all)
329#
330cmd_init()
331{
332 # parse $args after "submodule ... init".
333 while test $# -ne 0
334 do
335 case "$1" in
336 -q|--quiet)
337 GIT_QUIET=1
338 ;;
339 --)
340 shift
341 break
342 ;;
343 -*)
344 usage
345 ;;
346 *)
347 break
348 ;;
349 esac
350 shift
351 done
352 module_list "$@" |
354 while read mode sha1 stage path
355 do
356 # Skip already registered paths
357 name=$(module_name "$path") || exit
358 url=$(git config submodule."$name".url)
359 test -z "$url" || continue
360 url=$(git config -f .gitmodules submodule."$name".url)
362 test -z "$url" &&
363 die "No url found for submodule path '$path' in .gitmodules"
364 # Possibly a url relative to parent
366 case "$url" in
367 ./*|../*)
368 url=$(resolve_relative_url "$url") || exit
369 ;;
370 esac
371 git config submodule."$name".url "$url" ||
373 die "Failed to register url for submodule path '$path'"
374 upd="$(git config -f .gitmodules submodule."$name".update)"
376 test -z "$upd" ||
377 git config submodule."$name".update "$upd" ||
378 die "Failed to register update mode for submodule path '$path'"
379 say "Submodule '$name' ($url) registered for path '$path'"
381 done
382}
383#
385# Update each submodule path to correct revision, using clone and checkout as needed
386#
387# $@ = requested paths (default to all)
388#
389cmd_update()
390{
391 # parse $args after "submodule ... update".
392 orig_flags=
393 while test $# -ne 0
394 do
395 case "$1" in
396 -q|--quiet)
397 GIT_QUIET=1
398 ;;
399 -i|--init)
400 init=1
401 ;;
402 -N|--no-fetch)
403 nofetch=1
404 ;;
405 -f|--force)
406 force=$1
407 ;;
408 -r|--rebase)
409 update="rebase"
410 ;;
411 --reference)
412 case "$2" in '') usage ;; esac
413 reference="--reference=$2"
414 orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
415 shift
416 ;;
417 --reference=*)
418 reference="$1"
419 ;;
420 -m|--merge)
421 update="merge"
422 ;;
423 --recursive)
424 recursive=1
425 ;;
426 --)
427 shift
428 break
429 ;;
430 -*)
431 usage
432 ;;
433 *)
434 break
435 ;;
436 esac
437 orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
438 shift
439 done
440 if test -n "$init"
442 then
443 cmd_init "--" "$@" || return
444 fi
445 cloned_modules=
447 module_list "$@" |
448 while read mode sha1 stage path
449 do
450 if test "$stage" = U
451 then
452 echo >&2 "Skipping unmerged submodule $path"
453 continue
454 fi
455 name=$(module_name "$path") || exit
456 url=$(git config submodule."$name".url)
457 update_module=$(git config submodule."$name".update)
458 if test -z "$url"
459 then
460 # Only mention uninitialized submodules when its
461 # path have been specified
462 test "$#" != "0" &&
463 say "Submodule path '$path' not initialized" &&
464 say "Maybe you want to use 'update --init'?"
465 continue
466 fi
467 if ! test -d "$path"/.git -o -f "$path"/.git
469 then
470 module_clone "$path" "$url" "$reference"|| exit
471 cloned_modules="$cloned_modules;$name"
472 subsha1=
473 else
474 subsha1=$(clear_local_git_env; cd "$path" &&
475 git rev-parse --verify HEAD) ||
476 die "Unable to find current revision in submodule path '$path'"
477 fi
478 if ! test -z "$update"
480 then
481 update_module=$update
482 fi
483 if test "$subsha1" != "$sha1"
485 then
486 subforce=$force
487 # If we don't already have a -f flag and the submodule has never been checked out
488 if test -z "$subsha1" -a -z "$force"
489 then
490 subforce="-f"
491 fi
492 if test -z "$nofetch"
494 then
495 # Run fetch only if $sha1 isn't present or it
496 # is not reachable from a ref.
497 (clear_local_git_env; cd "$path" &&
498 ( (rev=$(git rev-list -n 1 $sha1 --not --all 2>/dev/null) &&
499 test -z "$rev") || git-fetch)) ||
500 die "Unable to fetch in submodule path '$path'"
501 fi
502 # Is this something we just cloned?
504 case ";$cloned_modules;" in
505 *";$name;"*)
506 # then there is no local change to integrate
507 update_module= ;;
508 esac
509 case "$update_module" in
511 rebase)
512 command="git rebase"
513 action="rebase"
514 msg="rebased onto"
515 ;;
516 merge)
517 command="git merge"
518 action="merge"
519 msg="merged in"
520 ;;
521 *)
522 command="git checkout $subforce -q"
523 action="checkout"
524 msg="checked out"
525 ;;
526 esac
527 (clear_local_git_env; cd "$path" && $command "$sha1") ||
529 die "Unable to $action '$sha1' in submodule path '$path'"
530 say "Submodule path '$path': $msg '$sha1'"
531 fi
532 if test -n "$recursive"
534 then
535 (clear_local_git_env; cd "$path" && eval cmd_update "$orig_flags") ||
536 die "Failed to recurse into submodule path '$path'"
537 fi
538 done
539}
540set_name_rev () {
542 revname=$( (
543 clear_local_git_env
544 cd "$1" && {
545 git describe "$2" 2>/dev/null ||
546 git describe --tags "$2" 2>/dev/null ||
547 git describe --contains "$2" 2>/dev/null ||
548 git describe --all --always "$2"
549 }
550 ) )
551 test -z "$revname" || revname=" ($revname)"
552}
553#
554# Show commit summary for submodules in index or working tree
555#
556# If '--cached' is given, show summary between index and given commit,
557# or between working tree and given commit
558#
559# $@ = [commit (default 'HEAD'),] requested paths (default all)
560#
561cmd_summary() {
562 summary_limit=-1
563 for_status=
564 diff_cmd=diff-index
565 # parse $args after "submodule ... summary".
567 while test $# -ne 0
568 do
569 case "$1" in
570 --cached)
571 cached="$1"
572 ;;
573 --files)
574 files="$1"
575 ;;
576 --for-status)
577 for_status="$1"
578 ;;
579 -n|--summary-limit)
580 if summary_limit=$(($2 + 0)) 2>/dev/null && test "$summary_limit" = "$2"
581 then
582 :
583 else
584 usage
585 fi
586 shift
587 ;;
588 --)
589 shift
590 break
591 ;;
592 -*)
593 usage
594 ;;
595 *)
596 break
597 ;;
598 esac
599 shift
600 done
601 test $summary_limit = 0 && return
603 if rev=$(git rev-parse -q --verify --default HEAD ${1+"$1"})
605 then
606 head=$rev
607 test $# = 0 || shift
608 elif test -z "$1" -o "$1" = "HEAD"
609 then
610 # before the first commit: compare with an empty tree
611 head=$(git hash-object -w -t tree --stdin </dev/null)
612 test -z "$1" || shift
613 else
614 head="HEAD"
615 fi
616 if [ -n "$files" ]
618 then
619 test -n "$cached" &&
620 die "--cached cannot be used with --files"
621 diff_cmd=diff-files
622 head=
623 fi
624 cd_to_toplevel
626 # Get modified modules cared by user
627 modules=$(git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- "$@" |
628 sane_egrep '^:([0-7]* )?160000' |
629 while read mod_src mod_dst sha1_src sha1_dst status name
630 do
631 # Always show modules deleted or type-changed (blob<->module)
632 test $status = D -o $status = T && echo "$name" && continue
633 # Also show added or modified modules which are checked out
634 GIT_DIR="$name/.git" git-rev-parse --git-dir >/dev/null 2>&1 &&
635 echo "$name"
636 done
637 )
638 test -z "$modules" && return
640 git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- $modules |
642 sane_egrep '^:([0-7]* )?160000' |
643 cut -c2- |
644 while read mod_src mod_dst sha1_src sha1_dst status name
645 do
646 if test -z "$cached" &&
647 test $sha1_dst = 0000000000000000000000000000000000000000
648 then
649 case "$mod_dst" in
650 160000)
651 sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
652 ;;
653 100644 | 100755 | 120000)
654 sha1_dst=$(git hash-object $name)
655 ;;
656 000000)
657 ;; # removed
658 *)
659 # unexpected type
660 echo >&2 "unexpected mode $mod_dst"
661 continue ;;
662 esac
663 fi
664 missing_src=
665 missing_dst=
666 test $mod_src = 160000 &&
668 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_src^0 >/dev/null &&
669 missing_src=t
670 test $mod_dst = 160000 &&
672 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_dst^0 >/dev/null &&
673 missing_dst=t
674 total_commits=
676 case "$missing_src,$missing_dst" in
677 t,)
678 errmsg=" Warn: $name doesn't contain commit $sha1_src"
679 ;;
680 ,t)
681 errmsg=" Warn: $name doesn't contain commit $sha1_dst"
682 ;;
683 t,t)
684 errmsg=" Warn: $name doesn't contain commits $sha1_src and $sha1_dst"
685 ;;
686 *)
687 errmsg=
688 total_commits=$(
689 if test $mod_src = 160000 -a $mod_dst = 160000
690 then
691 range="$sha1_src...$sha1_dst"
692 elif test $mod_src = 160000
693 then
694 range=$sha1_src
695 else
696 range=$sha1_dst
697 fi
698 GIT_DIR="$name/.git" \
699 git rev-list --first-parent $range -- | wc -l
700 )
701 total_commits=" ($(($total_commits + 0)))"
702 ;;
703 esac
704 sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
706 sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
707 if test $status = T
708 then
709 if test $mod_dst = 160000
710 then
711 echo "* $name $sha1_abbr_src(blob)->$sha1_abbr_dst(submodule)$total_commits:"
712 else
713 echo "* $name $sha1_abbr_src(submodule)->$sha1_abbr_dst(blob)$total_commits:"
714 fi
715 else
716 echo "* $name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
717 fi
718 if test -n "$errmsg"
719 then
720 # Don't give error msg for modification whose dst is not submodule
721 # i.e. deleted or changed to blob
722 test $mod_dst = 160000 && echo "$errmsg"
723 else
724 if test $mod_src = 160000 -a $mod_dst = 160000
725 then
726 limit=
727 test $summary_limit -gt 0 && limit="-$summary_limit"
728 GIT_DIR="$name/.git" \
729 git log $limit --pretty='format: %m %s' \
730 --first-parent $sha1_src...$sha1_dst
731 elif test $mod_dst = 160000
732 then
733 GIT_DIR="$name/.git" \
734 git log --pretty='format: > %s' -1 $sha1_dst
735 else
736 GIT_DIR="$name/.git" \
737 git log --pretty='format: < %s' -1 $sha1_src
738 fi
739 echo
740 fi
741 echo
742 done |
743 if test -n "$for_status"; then
744 if [ -n "$files" ]; then
745 echo "# Submodules changed but not updated:"
746 else
747 echo "# Submodule changes to be committed:"
748 fi
749 echo "#"
750 sed -e 's|^|# |' -e 's|^# $|#|'
751 else
752 cat
753 fi
754}
755#
756# List all submodules, prefixed with:
757# - submodule not initialized
758# + different revision checked out
759#
760# If --cached was specified the revision in the index will be printed
761# instead of the currently checked out revision.
762#
763# $@ = requested paths (default to all)
764#
765cmd_status()
766{
767 # parse $args after "submodule ... status".
768 orig_flags=
769 while test $# -ne 0
770 do
771 case "$1" in
772 -q|--quiet)
773 GIT_QUIET=1
774 ;;
775 --cached)
776 cached=1
777 ;;
778 --recursive)
779 recursive=1
780 ;;
781 --)
782 shift
783 break
784 ;;
785 -*)
786 usage
787 ;;
788 *)
789 break
790 ;;
791 esac
792 orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
793 shift
794 done
795 module_list "$@" |
797 while read mode sha1 stage path
798 do
799 name=$(module_name "$path") || exit
800 url=$(git config submodule."$name".url)
801 displaypath="$prefix$path"
802 if test "$stage" = U
803 then
804 say "U$sha1 $displaypath"
805 continue
806 fi
807 if test -z "$url" || ! test -d "$path"/.git -o -f "$path"/.git
808 then
809 say "-$sha1 $displaypath"
810 continue;
811 fi
812 set_name_rev "$path" "$sha1"
813 if git diff-files --ignore-submodules=dirty --quiet -- "$path"
814 then
815 say " $sha1 $displaypath$revname"
816 else
817 if test -z "$cached"
818 then
819 sha1=$(clear_local_git_env; cd "$path" && git rev-parse --verify HEAD)
820 set_name_rev "$path" "$sha1"
821 fi
822 say "+$sha1 $displaypath$revname"
823 fi
824 if test -n "$recursive"
826 then
827 (
828 prefix="$displaypath/"
829 clear_local_git_env
830 cd "$path" &&
831 eval cmd_status "$orig_args"
832 ) ||
833 die "Failed to recurse into submodule path '$path'"
834 fi
835 done
836}
837#
838# Sync remote urls for submodules
839# This makes the value for remote.$remote.url match the value
840# specified in .gitmodules.
841#
842cmd_sync()
843{
844 while test $# -ne 0
845 do
846 case "$1" in
847 -q|--quiet)
848 GIT_QUIET=1
849 shift
850 ;;
851 --)
852 shift
853 break
854 ;;
855 -*)
856 usage
857 ;;
858 *)
859 break
860 ;;
861 esac
862 done
863 cd_to_toplevel
864 module_list "$@" |
865 while read mode sha1 stage path
866 do
867 name=$(module_name "$path")
868 url=$(git config -f .gitmodules --get submodule."$name".url)
869 # Possibly a url relative to parent
871 case "$url" in
872 ./*|../*)
873 url=$(resolve_relative_url "$url") || exit
874 ;;
875 esac
876 say "Synchronizing submodule url for '$name'"
878 git config submodule."$name".url "$url"
879 if test -e "$path"/.git
881 then
882 (
883 clear_local_git_env
884 cd "$path"
885 remote=$(get_default_remote)
886 git config remote."$remote".url "$url"
887 )
888 fi
889 done
890}
891# This loop parses the command line arguments to find the
893# subcommand name to dispatch. Parsing of the subcommand specific
894# options are primarily done by the subcommand implementations.
895# Subcommand specific options such as --branch and --cached are
896# parsed here as well, for backward compatibility.
897while test $# != 0 && test -z "$command"
899do
900 case "$1" in
901 add | foreach | init | update | status | summary | sync)
902 command=$1
903 ;;
904 -q|--quiet)
905 GIT_QUIET=1
906 ;;
907 -b|--branch)
908 case "$2" in
909 '')
910 usage
911 ;;
912 esac
913 branch="$2"; shift
914 ;;
915 --cached)
916 cached="$1"
917 ;;
918 --)
919 break
920 ;;
921 -*)
922 usage
923 ;;
924 *)
925 break
926 ;;
927 esac
928 shift
929done
930# No command word defaults to "status"
932test -n "$command" || command=status
933# "-b branch" is accepted only by "add"
935if test -n "$branch" && test "$command" != add
936then
937 usage
938fi
939# "--cached" is accepted only by "status" and "summary"
941if test -n "$cached" && test "$command" != status -a "$command" != summary
942then
943 usage
944fi
945"cmd_$command" "$@"