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] [--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] [--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: $dashless [--quiet] sync [--] [<path>...]"
15OPTIONS_SPEC=
16. git-sh-setup
17. git-parse-remote
18require_work_tree
19command=
21branch=
22reference=
23cached=
24recursive=
25init=
26files=
27nofetch=
28update=
29prefix=
30# Resolve relative url by appending to parent's url
32resolve_relative_url ()
33{
34 remote=$(get_default_remote)
35 remoteurl=$(git config "remote.$remote.url") ||
36 die "remote ($remote) does not have a url defined in .git/config"
37 url="$1"
38 remoteurl=${remoteurl%/}
39 while test -n "$url"
40 do
41 case "$url" in
42 ../*)
43 url="${url#../}"
44 remoteurl="${remoteurl%/*}"
45 ;;
46 ./*)
47 url="${url#./}"
48 ;;
49 *)
50 break;;
51 esac
52 done
53 echo "$remoteurl/${url%/}"
54}
55#
57# Get submodule info for registered submodules
58# $@ = path to limit submodule list
59#
60module_list()
61{
62 git ls-files --error-unmatch --stage -- "$@" | sane_grep '^160000 '
63}
64#
66# Map submodule path to submodule name
67#
68# $1 = path
69#
70module_name()
71{
72 # Do we have "submodule.<something>.path = $1" defined in .gitmodules file?
73 re=$(printf '%s\n' "$1" | sed -e 's/[].[^$\\*]/\\&/g')
74 name=$( git config -f .gitmodules --get-regexp '^submodule\..*\.path$' |
75 sed -n -e 's|^submodule\.\(.*\)\.path '"$re"'$|\1|p' )
76 test -z "$name" &&
77 die "No submodule mapping found in .gitmodules for path '$path'"
78 echo "$name"
79}
80#
82# Clone a submodule
83#
84# Prior to calling, cmd_update checks that a possibly existing
85# path is not a git repository.
86# Likewise, cmd_add checks that path does not exist at all,
87# since it is the location of a new submodule.
88#
89module_clone()
90{
91 path=$1
92 url=$2
93 reference="$3"
94 # If there already is a directory at the submodule path,
96 # expect it to be empty (since that is the default checkout
97 # action) and try to remove it.
98 # Note: if $path is a symlink to a directory the test will
99 # succeed but the rmdir will fail. We might want to fix this.
100 if test -d "$path"
101 then
102 rmdir "$path" 2>/dev/null ||
103 die "Directory '$path' exists, but is neither empty nor a git repository"
104 fi
105 test -e "$path" &&
107 die "A file already exist at path '$path'"
108 if test -n "$reference"
110 then
111 git-clone "$reference" -n "$url" "$path"
112 else
113 git-clone -n "$url" "$path"
114 fi ||
115 die "Clone of '$url' into submodule path '$path' failed"
116}
117#
119# Add a new submodule to the working tree, .gitmodules and the index
120#
121# $@ = repo path
122#
123# optional branch is stored in global branch variable
124#
125cmd_add()
126{
127 # parse $args after "submodule ... add".
128 while test $# -ne 0
129 do
130 case "$1" in
131 -b | --branch)
132 case "$2" in '') usage ;; esac
133 branch=$2
134 shift
135 ;;
136 -q|--quiet)
137 GIT_QUIET=1
138 ;;
139 --reference)
140 case "$2" in '') usage ;; esac
141 reference="--reference=$2"
142 shift
143 ;;
144 --reference=*)
145 reference="$1"
146 shift
147 ;;
148 --)
149 shift
150 break
151 ;;
152 -*)
153 usage
154 ;;
155 *)
156 break
157 ;;
158 esac
159 shift
160 done
161 repo=$1
163 path=$2
164 if test -z "$path"; then
166 path=$(echo "$repo" |
167 sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
168 fi
169 if test -z "$repo" -o -z "$path"; then
171 usage
172 fi
173 # assure repo is absolute or relative to parent
175 case "$repo" in
176 ./*|../*)
177 # dereference source url relative to parent's url
178 realrepo=$(resolve_relative_url "$repo") || exit
179 ;;
180 *:*|/*)
181 # absolute url
182 realrepo=$repo
183 ;;
184 *)
185 die "repo URL: '$repo' must be absolute or begin with ./|../"
186 ;;
187 esac
188 # normalize path:
190 # multiple //; leading ./; /./; /../; trailing /
191 path=$(printf '%s/\n' "$path" |
192 sed -e '
193 s|//*|/|g
194 s|^\(\./\)*||
195 s|/\./|/|g
196 :start
197 s|\([^/]*\)/\.\./||
198 tstart
199 s|/*$||
200 ')
201 git ls-files --error-unmatch "$path" > /dev/null 2>&1 &&
202 die "'$path' already exists in the index"
203 # perhaps the path exists and is already a git repo, else clone it
205 if test -e "$path"
206 then
207 if test -d "$path"/.git -o -f "$path"/.git
208 then
209 echo "Adding existing repo at '$path' to the index"
210 else
211 die "'$path' already exists and is not a valid git repo"
212 fi
213 case "$repo" in
215 ./*|../*)
216 url=$(resolve_relative_url "$repo") || exit
217 ;;
218 *)
219 url="$repo"
220 ;;
221 esac
222 git config submodule."$path".url "$url"
223 else
224 module_clone "$path" "$realrepo" "$reference" || exit
226 (
227 clear_local_git_env
228 cd "$path" &&
229 # ash fails to wordsplit ${branch:+-b "$branch"...}
230 case "$branch" in
231 '') git checkout -f -q ;;
232 ?*) git checkout -f -q -b "$branch" "origin/$branch" ;;
233 esac
234 ) || die "Unable to checkout submodule '$path'"
235 fi
236 git add "$path" ||
238 die "Failed to add submodule '$path'"
239 git config -f .gitmodules submodule."$path".path "$path" &&
241 git config -f .gitmodules submodule."$path".url "$repo" &&
242 git add .gitmodules ||
243 die "Failed to register submodule '$path'"
244}
245#
247# Execute an arbitrary command sequence in each checked out
248# submodule
249#
250# $@ = command to execute
251#
252cmd_foreach()
253{
254 # parse $args after "submodule ... foreach".
255 while test $# -ne 0
256 do
257 case "$1" in
258 -q|--quiet)
259 GIT_QUIET=1
260 ;;
261 --recursive)
262 recursive=1
263 ;;
264 -*)
265 usage
266 ;;
267 *)
268 break
269 ;;
270 esac
271 shift
272 done
273 module_list |
275 while read mode sha1 stage path
276 do
277 if test -e "$path"/.git
278 then
279 say "Entering '$prefix$path'"
280 name=$(module_name "$path")
281 (
282 prefix="$prefix$path/"
283 clear_local_git_env
284 cd "$path" &&
285 eval "$@" &&
286 if test -n "$recursive"
287 then
288 cmd_foreach "--recursive" "$@"
289 fi
290 ) ||
291 die "Stopping at '$path'; script returned non-zero status."
292 fi
293 done
294}
295#
297# Register submodules in .git/config
298#
299# $@ = requested paths (default to all)
300#
301cmd_init()
302{
303 # parse $args after "submodule ... init".
304 while test $# -ne 0
305 do
306 case "$1" in
307 -q|--quiet)
308 GIT_QUIET=1
309 ;;
310 --)
311 shift
312 break
313 ;;
314 -*)
315 usage
316 ;;
317 *)
318 break
319 ;;
320 esac
321 shift
322 done
323 module_list "$@" |
325 while read mode sha1 stage path
326 do
327 # Skip already registered paths
328 name=$(module_name "$path") || exit
329 url=$(git config submodule."$name".url)
330 test -z "$url" || continue
331 url=$(git config -f .gitmodules submodule."$name".url)
333 test -z "$url" &&
334 die "No url found for submodule path '$path' in .gitmodules"
335 # Possibly a url relative to parent
337 case "$url" in
338 ./*|../*)
339 url=$(resolve_relative_url "$url") || exit
340 ;;
341 esac
342 git config submodule."$name".url "$url" ||
344 die "Failed to register url for submodule path '$path'"
345 upd="$(git config -f .gitmodules submodule."$name".update)"
347 test -z "$upd" ||
348 git config submodule."$name".update "$upd" ||
349 die "Failed to register update mode for submodule path '$path'"
350 say "Submodule '$name' ($url) registered for path '$path'"
352 done
353}
354#
356# Update each submodule path to correct revision, using clone and checkout as needed
357#
358# $@ = requested paths (default to all)
359#
360cmd_update()
361{
362 # parse $args after "submodule ... update".
363 orig_args="$@"
364 while test $# -ne 0
365 do
366 case "$1" in
367 -q|--quiet)
368 shift
369 GIT_QUIET=1
370 ;;
371 -i|--init)
372 init=1
373 shift
374 ;;
375 -N|--no-fetch)
376 shift
377 nofetch=1
378 ;;
379 -r|--rebase)
380 shift
381 update="rebase"
382 ;;
383 --reference)
384 case "$2" in '') usage ;; esac
385 reference="--reference=$2"
386 shift 2
387 ;;
388 --reference=*)
389 reference="$1"
390 shift
391 ;;
392 -m|--merge)
393 shift
394 update="merge"
395 ;;
396 --recursive)
397 shift
398 recursive=1
399 ;;
400 --)
401 shift
402 break
403 ;;
404 -*)
405 usage
406 ;;
407 *)
408 break
409 ;;
410 esac
411 done
412 if test -n "$init"
414 then
415 cmd_init "--" "$@" || return
416 fi
417 module_list "$@" |
419 while read mode sha1 stage path
420 do
421 name=$(module_name "$path") || exit
422 url=$(git config submodule."$name".url)
423 update_module=$(git config submodule."$name".update)
424 if test -z "$url"
425 then
426 # Only mention uninitialized submodules when its
427 # path have been specified
428 test "$#" != "0" &&
429 say "Submodule path '$path' not initialized" &&
430 say "Maybe you want to use 'update --init'?"
431 continue
432 fi
433 if ! test -d "$path"/.git -o -f "$path"/.git
435 then
436 module_clone "$path" "$url" "$reference"|| exit
437 subsha1=
438 else
439 subsha1=$(clear_local_git_env; cd "$path" &&
440 git rev-parse --verify HEAD) ||
441 die "Unable to find current revision in submodule path '$path'"
442 fi
443 if ! test -z "$update"
445 then
446 update_module=$update
447 fi
448 if test "$subsha1" != "$sha1"
450 then
451 force=
452 if test -z "$subsha1"
453 then
454 force="-f"
455 fi
456 if test -z "$nofetch"
458 then
459 (clear_local_git_env; cd "$path" &&
460 git-fetch) ||
461 die "Unable to fetch in submodule path '$path'"
462 fi
463 case "$update_module" in
465 rebase)
466 command="git rebase"
467 action="rebase"
468 msg="rebased onto"
469 ;;
470 merge)
471 command="git merge"
472 action="merge"
473 msg="merged in"
474 ;;
475 *)
476 command="git checkout $force -q"
477 action="checkout"
478 msg="checked out"
479 ;;
480 esac
481 (clear_local_git_env; cd "$path" && $command "$sha1") ||
483 die "Unable to $action '$sha1' in submodule path '$path'"
484 say "Submodule path '$path': $msg '$sha1'"
485 fi
486 if test -n "$recursive"
488 then
489 (clear_local_git_env; cd "$path" && cmd_update $orig_args) ||
490 die "Failed to recurse into submodule path '$path'"
491 fi
492 done
493}
494set_name_rev () {
496 revname=$( (
497 clear_local_git_env
498 cd "$1" && {
499 git describe "$2" 2>/dev/null ||
500 git describe --tags "$2" 2>/dev/null ||
501 git describe --contains "$2" 2>/dev/null ||
502 git describe --all --always "$2"
503 }
504 ) )
505 test -z "$revname" || revname=" ($revname)"
506}
507#
508# Show commit summary for submodules in index or working tree
509#
510# If '--cached' is given, show summary between index and given commit,
511# or between working tree and given commit
512#
513# $@ = [commit (default 'HEAD'),] requested paths (default all)
514#
515cmd_summary() {
516 summary_limit=-1
517 for_status=
518 diff_cmd=diff-index
519 # parse $args after "submodule ... summary".
521 while test $# -ne 0
522 do
523 case "$1" in
524 --cached)
525 cached="$1"
526 ;;
527 --files)
528 files="$1"
529 ;;
530 --for-status)
531 for_status="$1"
532 ;;
533 -n|--summary-limit)
534 if summary_limit=$(($2 + 0)) 2>/dev/null && test "$summary_limit" = "$2"
535 then
536 :
537 else
538 usage
539 fi
540 shift
541 ;;
542 --)
543 shift
544 break
545 ;;
546 -*)
547 usage
548 ;;
549 *)
550 break
551 ;;
552 esac
553 shift
554 done
555 test $summary_limit = 0 && return
557 if rev=$(git rev-parse -q --verify --default HEAD ${1+"$1"})
559 then
560 head=$rev
561 test $# = 0 || shift
562 elif test -z "$1" -o "$1" = "HEAD"
563 then
564 # before the first commit: compare with an empty tree
565 head=$(git hash-object -w -t tree --stdin </dev/null)
566 test -z "$1" || shift
567 else
568 head="HEAD"
569 fi
570 if [ -n "$files" ]
572 then
573 test -n "$cached" &&
574 die "--cached cannot be used with --files"
575 diff_cmd=diff-files
576 head=
577 fi
578 cd_to_toplevel
580 # Get modified modules cared by user
581 modules=$(git $diff_cmd $cached --raw $head -- "$@" |
582 sane_egrep '^:([0-7]* )?160000' |
583 while read mod_src mod_dst sha1_src sha1_dst status name
584 do
585 # Always show modules deleted or type-changed (blob<->module)
586 test $status = D -o $status = T && echo "$name" && continue
587 # Also show added or modified modules which are checked out
588 GIT_DIR="$name/.git" git-rev-parse --git-dir >/dev/null 2>&1 &&
589 echo "$name"
590 done
591 )
592 test -z "$modules" && return
594 git $diff_cmd $cached --raw $head -- $modules |
596 sane_egrep '^:([0-7]* )?160000' |
597 cut -c2- |
598 while read mod_src mod_dst sha1_src sha1_dst status name
599 do
600 if test -z "$cached" &&
601 test $sha1_dst = 0000000000000000000000000000000000000000
602 then
603 case "$mod_dst" in
604 160000)
605 sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
606 ;;
607 100644 | 100755 | 120000)
608 sha1_dst=$(git hash-object $name)
609 ;;
610 000000)
611 ;; # removed
612 *)
613 # unexpected type
614 echo >&2 "unexpected mode $mod_dst"
615 continue ;;
616 esac
617 fi
618 missing_src=
619 missing_dst=
620 test $mod_src = 160000 &&
622 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_src^0 >/dev/null &&
623 missing_src=t
624 test $mod_dst = 160000 &&
626 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_dst^0 >/dev/null &&
627 missing_dst=t
628 total_commits=
630 case "$missing_src,$missing_dst" in
631 t,)
632 errmsg=" Warn: $name doesn't contain commit $sha1_src"
633 ;;
634 ,t)
635 errmsg=" Warn: $name doesn't contain commit $sha1_dst"
636 ;;
637 t,t)
638 errmsg=" Warn: $name doesn't contain commits $sha1_src and $sha1_dst"
639 ;;
640 *)
641 errmsg=
642 total_commits=$(
643 if test $mod_src = 160000 -a $mod_dst = 160000
644 then
645 range="$sha1_src...$sha1_dst"
646 elif test $mod_src = 160000
647 then
648 range=$sha1_src
649 else
650 range=$sha1_dst
651 fi
652 GIT_DIR="$name/.git" \
653 git rev-list --first-parent $range -- | wc -l
654 )
655 total_commits=" ($(($total_commits + 0)))"
656 ;;
657 esac
658 sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
660 sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
661 if test $status = T
662 then
663 if test $mod_dst = 160000
664 then
665 echo "* $name $sha1_abbr_src(blob)->$sha1_abbr_dst(submodule)$total_commits:"
666 else
667 echo "* $name $sha1_abbr_src(submodule)->$sha1_abbr_dst(blob)$total_commits:"
668 fi
669 else
670 echo "* $name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
671 fi
672 if test -n "$errmsg"
673 then
674 # Don't give error msg for modification whose dst is not submodule
675 # i.e. deleted or changed to blob
676 test $mod_dst = 160000 && echo "$errmsg"
677 else
678 if test $mod_src = 160000 -a $mod_dst = 160000
679 then
680 limit=
681 test $summary_limit -gt 0 && limit="-$summary_limit"
682 GIT_DIR="$name/.git" \
683 git log $limit --pretty='format: %m %s' \
684 --first-parent $sha1_src...$sha1_dst
685 elif test $mod_dst = 160000
686 then
687 GIT_DIR="$name/.git" \
688 git log --pretty='format: > %s' -1 $sha1_dst
689 else
690 GIT_DIR="$name/.git" \
691 git log --pretty='format: < %s' -1 $sha1_src
692 fi
693 echo
694 fi
695 echo
696 done |
697 if test -n "$for_status"; then
698 if [ -n "$files" ]; then
699 echo "# Submodules changed but not updated:"
700 else
701 echo "# Submodule changes to be committed:"
702 fi
703 echo "#"
704 sed -e 's|^|# |' -e 's|^# $|#|'
705 else
706 cat
707 fi
708}
709#
710# List all submodules, prefixed with:
711# - submodule not initialized
712# + different revision checked out
713#
714# If --cached was specified the revision in the index will be printed
715# instead of the currently checked out revision.
716#
717# $@ = requested paths (default to all)
718#
719cmd_status()
720{
721 # parse $args after "submodule ... status".
722 orig_args="$@"
723 while test $# -ne 0
724 do
725 case "$1" in
726 -q|--quiet)
727 GIT_QUIET=1
728 ;;
729 --cached)
730 cached=1
731 ;;
732 --recursive)
733 recursive=1
734 ;;
735 --)
736 shift
737 break
738 ;;
739 -*)
740 usage
741 ;;
742 *)
743 break
744 ;;
745 esac
746 shift
747 done
748 module_list "$@" |
750 while read mode sha1 stage path
751 do
752 name=$(module_name "$path") || exit
753 url=$(git config submodule."$name".url)
754 displaypath="$prefix$path"
755 if test -z "$url" || ! test -d "$path"/.git -o -f "$path"/.git
756 then
757 say "-$sha1 $displaypath"
758 continue;
759 fi
760 set_name_rev "$path" "$sha1"
761 if git diff-files --quiet -- "$path"
762 then
763 say " $sha1 $displaypath$revname"
764 else
765 if test -z "$cached"
766 then
767 sha1=$(clear_local_git_env; cd "$path" && git rev-parse --verify HEAD)
768 set_name_rev "$path" "$sha1"
769 fi
770 say "+$sha1 $displaypath$revname"
771 fi
772 if test -n "$recursive"
774 then
775 (
776 prefix="$displaypath/"
777 clear_local_git_env
778 cd "$path" &&
779 cmd_status $orig_args
780 ) ||
781 die "Failed to recurse into submodule path '$path'"
782 fi
783 done
784}
785#
786# Sync remote urls for submodules
787# This makes the value for remote.$remote.url match the value
788# specified in .gitmodules.
789#
790cmd_sync()
791{
792 while test $# -ne 0
793 do
794 case "$1" in
795 -q|--quiet)
796 GIT_QUIET=1
797 shift
798 ;;
799 --)
800 shift
801 break
802 ;;
803 -*)
804 usage
805 ;;
806 *)
807 break
808 ;;
809 esac
810 done
811 cd_to_toplevel
812 module_list "$@" |
813 while read mode sha1 stage path
814 do
815 name=$(module_name "$path")
816 url=$(git config -f .gitmodules --get submodule."$name".url)
817 # Possibly a url relative to parent
819 case "$url" in
820 ./*|../*)
821 url=$(resolve_relative_url "$url") || exit
822 ;;
823 esac
824 if test -e "$path"/.git
826 then
827 (
828 clear_local_git_env
829 cd "$path"
830 remote=$(get_default_remote)
831 say "Synchronizing submodule url for '$name'"
832 git config remote."$remote".url "$url"
833 )
834 fi
835 done
836}
837# This loop parses the command line arguments to find the
839# subcommand name to dispatch. Parsing of the subcommand specific
840# options are primarily done by the subcommand implementations.
841# Subcommand specific options such as --branch and --cached are
842# parsed here as well, for backward compatibility.
843while test $# != 0 && test -z "$command"
845do
846 case "$1" in
847 add | foreach | init | update | status | summary | sync)
848 command=$1
849 ;;
850 -q|--quiet)
851 GIT_QUIET=1
852 ;;
853 -b|--branch)
854 case "$2" in
855 '')
856 usage
857 ;;
858 esac
859 branch="$2"; shift
860 ;;
861 --cached)
862 cached="$1"
863 ;;
864 --)
865 break
866 ;;
867 -*)
868 usage
869 ;;
870 *)
871 break
872 ;;
873 esac
874 shift
875done
876# No command word defaults to "status"
878test -n "$command" || command=status
879# "-b branch" is accepted only by "add"
881if test -n "$branch" && test "$command" != add
882then
883 usage
884fi
885# "--cached" is accepted only by "status" and "summary"
887if test -n "$cached" && test "$command" != status -a "$command" != summary
888then
889 usage
890fi
891"cmd_$command" "$@"