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# $@ = path to limit submodule list
57#
58module_list()
59{
60 git ls-files --error-unmatch --stage -- "$@" | sane_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 --default HEAD ${1+"$1"})
557 then
558 head=$rev
559 test $# = 0 || shift
560 elif test -z "$1" -o "$1" = "HEAD"
561 then
562 # before the first commit: compare with an empty tree
563 head=$(git hash-object -w -t tree --stdin </dev/null)
564 else
565 head="HEAD"
566 fi
567 if [ -n "$files" ]
569 then
570 test -n "$cached" &&
571 die "--cached cannot be used with --files"
572 diff_cmd=diff-files
573 head=
574 fi
575 cd_to_toplevel
577 # Get modified modules cared by user
578 modules=$(git $diff_cmd $cached --raw $head -- "$@" |
579 sane_egrep '^:([0-7]* )?160000' |
580 while read mod_src mod_dst sha1_src sha1_dst status name
581 do
582 # Always show modules deleted or type-changed (blob<->module)
583 test $status = D -o $status = T && echo "$name" && continue
584 # Also show added or modified modules which are checked out
585 GIT_DIR="$name/.git" git-rev-parse --git-dir >/dev/null 2>&1 &&
586 echo "$name"
587 done
588 )
589 test -z "$modules" && return
591 git $diff_cmd $cached --raw $head -- $modules |
593 sane_egrep '^:([0-7]* )?160000' |
594 cut -c2- |
595 while read mod_src mod_dst sha1_src sha1_dst status name
596 do
597 if test -z "$cached" &&
598 test $sha1_dst = 0000000000000000000000000000000000000000
599 then
600 case "$mod_dst" in
601 160000)
602 sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
603 ;;
604 100644 | 100755 | 120000)
605 sha1_dst=$(git hash-object $name)
606 ;;
607 000000)
608 ;; # removed
609 *)
610 # unexpected type
611 echo >&2 "unexpected mode $mod_dst"
612 continue ;;
613 esac
614 fi
615 missing_src=
616 missing_dst=
617 test $mod_src = 160000 &&
619 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_src^0 >/dev/null &&
620 missing_src=t
621 test $mod_dst = 160000 &&
623 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_dst^0 >/dev/null &&
624 missing_dst=t
625 total_commits=
627 case "$missing_src,$missing_dst" in
628 t,)
629 errmsg=" Warn: $name doesn't contain commit $sha1_src"
630 ;;
631 ,t)
632 errmsg=" Warn: $name doesn't contain commit $sha1_dst"
633 ;;
634 t,t)
635 errmsg=" Warn: $name doesn't contain commits $sha1_src and $sha1_dst"
636 ;;
637 *)
638 errmsg=
639 total_commits=$(
640 if test $mod_src = 160000 -a $mod_dst = 160000
641 then
642 range="$sha1_src...$sha1_dst"
643 elif test $mod_src = 160000
644 then
645 range=$sha1_src
646 else
647 range=$sha1_dst
648 fi
649 GIT_DIR="$name/.git" \
650 git log --pretty=oneline --first-parent $range | wc -l
651 )
652 total_commits=" ($(($total_commits + 0)))"
653 ;;
654 esac
655 sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
657 sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
658 if test $status = T
659 then
660 if test $mod_dst = 160000
661 then
662 echo "* $name $sha1_abbr_src(blob)->$sha1_abbr_dst(submodule)$total_commits:"
663 else
664 echo "* $name $sha1_abbr_src(submodule)->$sha1_abbr_dst(blob)$total_commits:"
665 fi
666 else
667 echo "* $name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
668 fi
669 if test -n "$errmsg"
670 then
671 # Don't give error msg for modification whose dst is not submodule
672 # i.e. deleted or changed to blob
673 test $mod_dst = 160000 && echo "$errmsg"
674 else
675 if test $mod_src = 160000 -a $mod_dst = 160000
676 then
677 limit=
678 test $summary_limit -gt 0 && limit="-$summary_limit"
679 GIT_DIR="$name/.git" \
680 git log $limit --pretty='format: %m %s' \
681 --first-parent $sha1_src...$sha1_dst
682 elif test $mod_dst = 160000
683 then
684 GIT_DIR="$name/.git" \
685 git log --pretty='format: > %s' -1 $sha1_dst
686 else
687 GIT_DIR="$name/.git" \
688 git log --pretty='format: < %s' -1 $sha1_src
689 fi
690 echo
691 fi
692 echo
693 done |
694 if test -n "$for_status"; then
695 if [ -n "$files" ]; then
696 echo "# Submodules changed but not updated:"
697 else
698 echo "# Submodule changes to be committed:"
699 fi
700 echo "#"
701 sed -e 's|^|# |' -e 's|^# $|#|'
702 else
703 cat
704 fi
705}
706#
707# List all submodules, prefixed with:
708# - submodule not initialized
709# + different revision checked out
710#
711# If --cached was specified the revision in the index will be printed
712# instead of the currently checked out revision.
713#
714# $@ = requested paths (default to all)
715#
716cmd_status()
717{
718 # parse $args after "submodule ... status".
719 orig_args="$@"
720 while test $# -ne 0
721 do
722 case "$1" in
723 -q|--quiet)
724 GIT_QUIET=1
725 ;;
726 --cached)
727 cached=1
728 ;;
729 --recursive)
730 recursive=1
731 ;;
732 --)
733 shift
734 break
735 ;;
736 -*)
737 usage
738 ;;
739 *)
740 break
741 ;;
742 esac
743 shift
744 done
745 module_list "$@" |
747 while read mode sha1 stage path
748 do
749 name=$(module_name "$path") || exit
750 url=$(git config submodule."$name".url)
751 displaypath="$prefix$path"
752 if test -z "$url" || ! test -d "$path"/.git -o -f "$path"/.git
753 then
754 say "-$sha1 $displaypath"
755 continue;
756 fi
757 set_name_rev "$path" "$sha1"
758 if git diff-files --quiet -- "$path"
759 then
760 say " $sha1 $displaypath$revname"
761 else
762 if test -z "$cached"
763 then
764 sha1=$(unset GIT_DIR; cd "$path" && git rev-parse --verify HEAD)
765 set_name_rev "$path" "$sha1"
766 fi
767 say "+$sha1 $displaypath$revname"
768 fi
769 if test -n "$recursive"
771 then
772 (
773 prefix="$displaypath/"
774 unset GIT_DIR
775 cd "$path" &&
776 cmd_status $orig_args
777 ) ||
778 die "Failed to recurse into submodule path '$path'"
779 fi
780 done
781}
782#
783# Sync remote urls for submodules
784# This makes the value for remote.$remote.url match the value
785# specified in .gitmodules.
786#
787cmd_sync()
788{
789 while test $# -ne 0
790 do
791 case "$1" in
792 -q|--quiet)
793 GIT_QUIET=1
794 shift
795 ;;
796 --)
797 shift
798 break
799 ;;
800 -*)
801 usage
802 ;;
803 *)
804 break
805 ;;
806 esac
807 done
808 cd_to_toplevel
809 module_list "$@" |
810 while read mode sha1 stage path
811 do
812 name=$(module_name "$path")
813 url=$(git config -f .gitmodules --get submodule."$name".url)
814 # Possibly a url relative to parent
816 case "$url" in
817 ./*|../*)
818 url=$(resolve_relative_url "$url") || exit
819 ;;
820 esac
821 if test -e "$path"/.git
823 then
824 (
825 unset GIT_DIR
826 cd "$path"
827 remote=$(get_default_remote)
828 say "Synchronizing submodule url for '$name'"
829 git config remote."$remote".url "$url"
830 )
831 fi
832 done
833}
834# This loop parses the command line arguments to find the
836# subcommand name to dispatch. Parsing of the subcommand specific
837# options are primarily done by the subcommand implementations.
838# Subcommand specific options such as --branch and --cached are
839# parsed here as well, for backward compatibility.
840while test $# != 0 && test -z "$command"
842do
843 case "$1" in
844 add | foreach | init | update | status | summary | sync)
845 command=$1
846 ;;
847 -q|--quiet)
848 GIT_QUIET=1
849 ;;
850 -b|--branch)
851 case "$2" in
852 '')
853 usage
854 ;;
855 esac
856 branch="$2"; shift
857 ;;
858 --cached)
859 cached="$1"
860 ;;
861 --)
862 break
863 ;;
864 -*)
865 usage
866 ;;
867 *)
868 break
869 ;;
870 esac
871 shift
872done
873# No command word defaults to "status"
875test -n "$command" || command=status
876# "-b branch" is accepted only by "add"
878if test -n "$branch" && test "$command" != add
879then
880 usage
881fi
882# "--cached" is accepted only by "status" and "summary"
884if test -n "$cached" && test "$command" != status -a "$command" != summary
885then
886 usage
887fi
888"cmd_$command" "$@"