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: $dashless [--quiet] sync [--] [<path>...]"
15OPTIONS_SPEC=
16. git-sh-setup
17. git-parse-remote
18require_work_tree
19command=
21branch=
22reference=
23cached=
24files=
25nofetch=
26update=
27prefix=
28# Resolve relative url by appending to parent's url
30resolve_relative_url ()
31{
32 remote=$(get_default_remote)
33 remoteurl=$(git config "remote.$remote.url") ||
34 die "remote ($remote) does not have a url defined in .git/config"
35 url="$1"
36 remoteurl=${remoteurl%/}
37 while test -n "$url"
38 do
39 case "$url" in
40 ../*)
41 url="${url#../}"
42 remoteurl="${remoteurl%/*}"
43 ;;
44 ./*)
45 url="${url#./}"
46 ;;
47 *)
48 break;;
49 esac
50 done
51 echo "$remoteurl/${url%/}"
52}
53#
55# Get submodule info for registered submodules
56# $@ = path to limit submodule list
57#
58module_list()
59{
60 git ls-files --error-unmatch --stage -- "$@" | grep '^160000 '
61}
62#
64# Map submodule path to submodule name
65#
66# $1 = path
67#
68module_name()
69{
70 # Do we have "submodule.<something>.path = $1" defined in .gitmodules file?
71 re=$(printf '%s\n' "$1" | sed -e 's/[].[^$\\*]/\\&/g')
72 name=$( git config -f .gitmodules --get-regexp '^submodule\..*\.path$' |
73 sed -n -e 's|^submodule\.\(.*\)\.path '"$re"'$|\1|p' )
74 test -z "$name" &&
75 die "No submodule mapping found in .gitmodules for path '$path'"
76 echo "$name"
77}
78#
80# Clone a submodule
81#
82# Prior to calling, cmd_update checks that a possibly existing
83# path is not a git repository.
84# Likewise, cmd_add checks that path does not exist at all,
85# since it is the location of a new submodule.
86#
87module_clone()
88{
89 path=$1
90 url=$2
91 reference="$3"
92 # If there already is a directory at the submodule path,
94 # expect it to be empty (since that is the default checkout
95 # action) and try to remove it.
96 # Note: if $path is a symlink to a directory the test will
97 # succeed but the rmdir will fail. We might want to fix this.
98 if test -d "$path"
99 then
100 rmdir "$path" 2>/dev/null ||
101 die "Directory '$path' exists, but is neither empty nor a git repository"
102 fi
103 test -e "$path" &&
105 die "A file already exist at path '$path'"
106 if test -n "$reference"
108 then
109 git-clone "$reference" -n "$url" "$path"
110 else
111 git-clone -n "$url" "$path"
112 fi ||
113 die "Clone of '$url' into submodule path '$path' failed"
114}
115#
117# Add a new submodule to the working tree, .gitmodules and the index
118#
119# $@ = repo path
120#
121# optional branch is stored in global branch variable
122#
123cmd_add()
124{
125 # parse $args after "submodule ... add".
126 while test $# -ne 0
127 do
128 case "$1" in
129 -b | --branch)
130 case "$2" in '') usage ;; esac
131 branch=$2
132 shift
133 ;;
134 -q|--quiet)
135 GIT_QUIET=1
136 ;;
137 --reference)
138 case "$2" in '') usage ;; esac
139 reference="--reference=$2"
140 shift
141 ;;
142 --reference=*)
143 reference="$1"
144 shift
145 ;;
146 --)
147 shift
148 break
149 ;;
150 -*)
151 usage
152 ;;
153 *)
154 break
155 ;;
156 esac
157 shift
158 done
159 repo=$1
161 path=$2
162 if test -z "$path"; then
164 path=$(echo "$repo" |
165 sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
166 fi
167 if test -z "$repo" -o -z "$path"; then
169 usage
170 fi
171 # assure repo is absolute or relative to parent
173 case "$repo" in
174 ./*|../*)
175 # dereference source url relative to parent's url
176 realrepo=$(resolve_relative_url "$repo") || exit
177 ;;
178 *:*|/*)
179 # absolute url
180 realrepo=$repo
181 ;;
182 *)
183 die "repo URL: '$repo' must be absolute or begin with ./|../"
184 ;;
185 esac
186 # normalize path:
188 # multiple //; leading ./; /./; /../; trailing /
189 path=$(printf '%s/\n' "$path" |
190 sed -e '
191 s|//*|/|g
192 s|^\(\./\)*||
193 s|/\./|/|g
194 :start
195 s|\([^/]*\)/\.\./||
196 tstart
197 s|/*$||
198 ')
199 git ls-files --error-unmatch "$path" > /dev/null 2>&1 &&
200 die "'$path' already exists in the index"
201 # perhaps the path exists and is already a git repo, else clone it
203 if test -e "$path"
204 then
205 if test -d "$path"/.git -o -f "$path"/.git
206 then
207 echo "Adding existing repo at '$path' to the index"
208 else
209 die "'$path' already exists and is not a valid git repo"
210 fi
211 case "$repo" in
213 ./*|../*)
214 url=$(resolve_relative_url "$repo") || exit
215 ;;
216 *)
217 url="$repo"
218 ;;
219 esac
220 git config submodule."$path".url "$url"
221 else
222 module_clone "$path" "$realrepo" "$reference" || exit
224 (
225 unset GIT_DIR
226 cd "$path" &&
227 # ash fails to wordsplit ${branch:+-b "$branch"...}
228 case "$branch" in
229 '') git checkout -f -q ;;
230 ?*) git checkout -f -q -b "$branch" "origin/$branch" ;;
231 esac
232 ) || die "Unable to checkout submodule '$path'"
233 fi
234 git add "$path" ||
236 die "Failed to add submodule '$path'"
237 git config -f .gitmodules submodule."$path".path "$path" &&
239 git config -f .gitmodules submodule."$path".url "$repo" &&
240 git add .gitmodules ||
241 die "Failed to register submodule '$path'"
242}
243#
245# Execute an arbitrary command sequence in each checked out
246# submodule
247#
248# $@ = command to execute
249#
250cmd_foreach()
251{
252 # parse $args after "submodule ... foreach".
253 while test $# -ne 0
254 do
255 case "$1" in
256 -q|--quiet)
257 GIT_QUIET=1
258 ;;
259 --recursive)
260 recursive=1
261 ;;
262 -*)
263 usage
264 ;;
265 *)
266 break
267 ;;
268 esac
269 shift
270 done
271 module_list |
273 while read mode sha1 stage path
274 do
275 if test -e "$path"/.git
276 then
277 say "Entering '$prefix$path'"
278 name=$(module_name "$path")
279 (
280 prefix="$prefix$path/"
281 unset GIT_DIR
282 cd "$path" &&
283 eval "$@" &&
284 if test -n "$recursive"
285 then
286 cmd_foreach "--recursive" "$@"
287 fi
288 ) ||
289 die "Stopping at '$path'; script returned non-zero status."
290 fi
291 done
292}
293#
295# Register submodules in .git/config
296#
297# $@ = requested paths (default to all)
298#
299cmd_init()
300{
301 # parse $args after "submodule ... init".
302 while test $# -ne 0
303 do
304 case "$1" in
305 -q|--quiet)
306 GIT_QUIET=1
307 ;;
308 --)
309 shift
310 break
311 ;;
312 -*)
313 usage
314 ;;
315 *)
316 break
317 ;;
318 esac
319 shift
320 done
321 module_list "$@" |
323 while read mode sha1 stage path
324 do
325 # Skip already registered paths
326 name=$(module_name "$path") || exit
327 url=$(git config submodule."$name".url)
328 test -z "$url" || continue
329 url=$(git config -f .gitmodules submodule."$name".url)
331 test -z "$url" &&
332 die "No url found for submodule path '$path' in .gitmodules"
333 # Possibly a url relative to parent
335 case "$url" in
336 ./*|../*)
337 url=$(resolve_relative_url "$url") || exit
338 ;;
339 esac
340 git config submodule."$name".url "$url" ||
342 die "Failed to register url for submodule path '$path'"
343 upd="$(git config -f .gitmodules submodule."$name".update)"
345 test -z "$upd" ||
346 git config submodule."$name".update "$upd" ||
347 die "Failed to register update mode for submodule path '$path'"
348 say "Submodule '$name' ($url) registered for path '$path'"
350 done
351}
352#
354# Update each submodule path to correct revision, using clone and checkout as needed
355#
356# $@ = requested paths (default to all)
357#
358cmd_update()
359{
360 # parse $args after "submodule ... update".
361 orig_args="$@"
362 while test $# -ne 0
363 do
364 case "$1" in
365 -q|--quiet)
366 shift
367 GIT_QUIET=1
368 ;;
369 -i|--init)
370 init=1
371 shift
372 ;;
373 -N|--no-fetch)
374 shift
375 nofetch=1
376 ;;
377 -r|--rebase)
378 shift
379 update="rebase"
380 ;;
381 --reference)
382 case "$2" in '') usage ;; esac
383 reference="--reference=$2"
384 shift 2
385 ;;
386 --reference=*)
387 reference="$1"
388 shift
389 ;;
390 -m|--merge)
391 shift
392 update="merge"
393 ;;
394 --recursive)
395 shift
396 recursive=1
397 ;;
398 --)
399 shift
400 break
401 ;;
402 -*)
403 usage
404 ;;
405 *)
406 break
407 ;;
408 esac
409 done
410 if test -n "$init"
412 then
413 cmd_init "--" "$@" || return
414 fi
415 module_list "$@" |
417 while read mode sha1 stage path
418 do
419 name=$(module_name "$path") || exit
420 url=$(git config submodule."$name".url)
421 update_module=$(git config submodule."$name".update)
422 if test -z "$url"
423 then
424 # Only mention uninitialized submodules when its
425 # path have been specified
426 test "$#" != "0" &&
427 say "Submodule path '$path' not initialized" &&
428 say "Maybe you want to use 'update --init'?"
429 continue
430 fi
431 if ! test -d "$path"/.git -o -f "$path"/.git
433 then
434 module_clone "$path" "$url" "$reference"|| exit
435 subsha1=
436 else
437 subsha1=$(unset GIT_DIR; cd "$path" &&
438 git rev-parse --verify HEAD) ||
439 die "Unable to find current revision in submodule path '$path'"
440 fi
441 if ! test -z "$update"
443 then
444 update_module=$update
445 fi
446 if test "$subsha1" != "$sha1"
448 then
449 force=
450 if test -z "$subsha1"
451 then
452 force="-f"
453 fi
454 if test -z "$nofetch"
456 then
457 (unset GIT_DIR; cd "$path" &&
458 git-fetch) ||
459 die "Unable to fetch in submodule path '$path'"
460 fi
461 case "$update_module" in
463 rebase)
464 command="git rebase"
465 action="rebase"
466 msg="rebased onto"
467 ;;
468 merge)
469 command="git merge"
470 action="merge"
471 msg="merged in"
472 ;;
473 *)
474 command="git checkout $force -q"
475 action="checkout"
476 msg="checked out"
477 ;;
478 esac
479 (unset GIT_DIR; cd "$path" && $command "$sha1") ||
481 die "Unable to $action '$sha1' in submodule path '$path'"
482 say "Submodule path '$path': $msg '$sha1'"
483 fi
484 if test -n "$recursive"
486 then
487 (unset GIT_DIR; cd "$path" && cmd_update $orig_args) ||
488 die "Failed to recurse into submodule path '$path'"
489 fi
490 done
491}
492set_name_rev () {
494 revname=$( (
495 unset GIT_DIR
496 cd "$1" && {
497 git describe "$2" 2>/dev/null ||
498 git describe --tags "$2" 2>/dev/null ||
499 git describe --contains "$2" 2>/dev/null ||
500 git describe --all --always "$2"
501 }
502 ) )
503 test -z "$revname" || revname=" ($revname)"
504}
505#
506# Show commit summary for submodules in index or working tree
507#
508# If '--cached' is given, show summary between index and given commit,
509# or between working tree and given commit
510#
511# $@ = [commit (default 'HEAD'),] requested paths (default all)
512#
513cmd_summary() {
514 summary_limit=-1
515 for_status=
516 diff_cmd=diff-index
517 # parse $args after "submodule ... summary".
519 while test $# -ne 0
520 do
521 case "$1" in
522 --cached)
523 cached="$1"
524 ;;
525 --files)
526 files="$1"
527 ;;
528 --for-status)
529 for_status="$1"
530 ;;
531 -n|--summary-limit)
532 if summary_limit=$(($2 + 0)) 2>/dev/null && test "$summary_limit" = "$2"
533 then
534 :
535 else
536 usage
537 fi
538 shift
539 ;;
540 --)
541 shift
542 break
543 ;;
544 -*)
545 usage
546 ;;
547 *)
548 break
549 ;;
550 esac
551 shift
552 done
553 test $summary_limit = 0 && return
555 if rev=$(git rev-parse -q --verify "$1^0")
557 then
558 head=$rev
559 shift
560 else
561 head=HEAD
562 fi
563 if [ -n "$files" ]
565 then
566 test -n "$cached" &&
567 die "--cached cannot be used with --files"
568 diff_cmd=diff-files
569 head=
570 fi
571 cd_to_toplevel
573 # Get modified modules cared by user
574 modules=$(git $diff_cmd $cached --raw $head -- "$@" |
575 egrep '^:([0-7]* )?160000' |
576 while read mod_src mod_dst sha1_src sha1_dst status name
577 do
578 # Always show modules deleted or type-changed (blob<->module)
579 test $status = D -o $status = T && echo "$name" && continue
580 # Also show added or modified modules which are checked out
581 GIT_DIR="$name/.git" git-rev-parse --git-dir >/dev/null 2>&1 &&
582 echo "$name"
583 done
584 )
585 test -z "$modules" && return
587 git $diff_cmd $cached --raw $head -- $modules |
589 egrep '^:([0-7]* )?160000' |
590 cut -c2- |
591 while read mod_src mod_dst sha1_src sha1_dst status name
592 do
593 if test -z "$cached" &&
594 test $sha1_dst = 0000000000000000000000000000000000000000
595 then
596 case "$mod_dst" in
597 160000)
598 sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
599 ;;
600 100644 | 100755 | 120000)
601 sha1_dst=$(git hash-object $name)
602 ;;
603 000000)
604 ;; # removed
605 *)
606 # unexpected type
607 echo >&2 "unexpected mode $mod_dst"
608 continue ;;
609 esac
610 fi
611 missing_src=
612 missing_dst=
613 test $mod_src = 160000 &&
615 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_src^0 >/dev/null &&
616 missing_src=t
617 test $mod_dst = 160000 &&
619 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_dst^0 >/dev/null &&
620 missing_dst=t
621 total_commits=
623 case "$missing_src,$missing_dst" in
624 t,)
625 errmsg=" Warn: $name doesn't contain commit $sha1_src"
626 ;;
627 ,t)
628 errmsg=" Warn: $name doesn't contain commit $sha1_dst"
629 ;;
630 t,t)
631 errmsg=" Warn: $name doesn't contain commits $sha1_src and $sha1_dst"
632 ;;
633 *)
634 errmsg=
635 total_commits=$(
636 if test $mod_src = 160000 -a $mod_dst = 160000
637 then
638 range="$sha1_src...$sha1_dst"
639 elif test $mod_src = 160000
640 then
641 range=$sha1_src
642 else
643 range=$sha1_dst
644 fi
645 GIT_DIR="$name/.git" \
646 git log --pretty=oneline --first-parent $range | wc -l
647 )
648 total_commits=" ($(($total_commits + 0)))"
649 ;;
650 esac
651 sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
653 sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
654 if test $status = T
655 then
656 if test $mod_dst = 160000
657 then
658 echo "* $name $sha1_abbr_src(blob)->$sha1_abbr_dst(submodule)$total_commits:"
659 else
660 echo "* $name $sha1_abbr_src(submodule)->$sha1_abbr_dst(blob)$total_commits:"
661 fi
662 else
663 echo "* $name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
664 fi
665 if test -n "$errmsg"
666 then
667 # Don't give error msg for modification whose dst is not submodule
668 # i.e. deleted or changed to blob
669 test $mod_dst = 160000 && echo "$errmsg"
670 else
671 if test $mod_src = 160000 -a $mod_dst = 160000
672 then
673 limit=
674 test $summary_limit -gt 0 && limit="-$summary_limit"
675 GIT_DIR="$name/.git" \
676 git log $limit --pretty='format: %m %s' \
677 --first-parent $sha1_src...$sha1_dst
678 elif test $mod_dst = 160000
679 then
680 GIT_DIR="$name/.git" \
681 git log --pretty='format: > %s' -1 $sha1_dst
682 else
683 GIT_DIR="$name/.git" \
684 git log --pretty='format: < %s' -1 $sha1_src
685 fi
686 echo
687 fi
688 echo
689 done |
690 if test -n "$for_status"; then
691 echo "# Modified submodules:"
692 echo "#"
693 sed -e 's|^|# |' -e 's|^# $|#|'
694 else
695 cat
696 fi
697}
698#
699# List all submodules, prefixed with:
700# - submodule not initialized
701# + different revision checked out
702#
703# If --cached was specified the revision in the index will be printed
704# instead of the currently checked out revision.
705#
706# $@ = requested paths (default to all)
707#
708cmd_status()
709{
710 # parse $args after "submodule ... status".
711 orig_args="$@"
712 while test $# -ne 0
713 do
714 case "$1" in
715 -q|--quiet)
716 GIT_QUIET=1
717 ;;
718 --cached)
719 cached=1
720 ;;
721 --recursive)
722 recursive=1
723 ;;
724 --)
725 shift
726 break
727 ;;
728 -*)
729 usage
730 ;;
731 *)
732 break
733 ;;
734 esac
735 shift
736 done
737 module_list "$@" |
739 while read mode sha1 stage path
740 do
741 name=$(module_name "$path") || exit
742 url=$(git config submodule."$name".url)
743 displaypath="$prefix$path"
744 if test -z "$url" || ! test -d "$path"/.git -o -f "$path"/.git
745 then
746 say "-$sha1 $displaypath"
747 continue;
748 fi
749 set_name_rev "$path" "$sha1"
750 if git diff-files --quiet -- "$path"
751 then
752 say " $sha1 $displaypath$revname"
753 else
754 if test -z "$cached"
755 then
756 sha1=$(unset GIT_DIR; cd "$path" && git rev-parse --verify HEAD)
757 set_name_rev "$path" "$sha1"
758 fi
759 say "+$sha1 $displaypath$revname"
760 fi
761 if test -n "$recursive"
763 then
764 (
765 prefix="$displaypath/"
766 unset GIT_DIR
767 cd "$path" &&
768 cmd_status $orig_args
769 ) ||
770 die "Failed to recurse into submodule path '$path'"
771 fi
772 done
773}
774#
775# Sync remote urls for submodules
776# This makes the value for remote.$remote.url match the value
777# specified in .gitmodules.
778#
779cmd_sync()
780{
781 while test $# -ne 0
782 do
783 case "$1" in
784 -q|--quiet)
785 GIT_QUIET=1
786 shift
787 ;;
788 --)
789 shift
790 break
791 ;;
792 -*)
793 usage
794 ;;
795 *)
796 break
797 ;;
798 esac
799 done
800 cd_to_toplevel
801 module_list "$@" |
802 while read mode sha1 stage path
803 do
804 name=$(module_name "$path")
805 url=$(git config -f .gitmodules --get submodule."$name".url)
806 # Possibly a url relative to parent
808 case "$url" in
809 ./*|../*)
810 url=$(resolve_relative_url "$url") || exit
811 ;;
812 esac
813 if test -e "$path"/.git
815 then
816 (
817 unset GIT_DIR
818 cd "$path"
819 remote=$(get_default_remote)
820 say "Synchronizing submodule url for '$name'"
821 git config remote."$remote".url "$url"
822 )
823 fi
824 done
825}
826# This loop parses the command line arguments to find the
828# subcommand name to dispatch. Parsing of the subcommand specific
829# options are primarily done by the subcommand implementations.
830# Subcommand specific options such as --branch and --cached are
831# parsed here as well, for backward compatibility.
832while test $# != 0 && test -z "$command"
834do
835 case "$1" in
836 add | foreach | init | update | status | summary | sync)
837 command=$1
838 ;;
839 -q|--quiet)
840 GIT_QUIET=1
841 ;;
842 -b|--branch)
843 case "$2" in
844 '')
845 usage
846 ;;
847 esac
848 branch="$2"; shift
849 ;;
850 --cached)
851 cached="$1"
852 ;;
853 --)
854 break
855 ;;
856 -*)
857 usage
858 ;;
859 *)
860 break
861 ;;
862 esac
863 shift
864done
865# No command word defaults to "status"
867test -n "$command" || command=status
868# "-b branch" is accepted only by "add"
870if test -n "$branch" && test "$command" != add
871then
872 usage
873fi
874# "--cached" is accepted only by "status" and "summary"
876if test -n "$cached" && test "$command" != status -a "$command" != summary
877then
878 usage
879fi
880"cmd_$command" "$@"