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] [--] [<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] [--summary-limit <n>] [commit] [--] [<path>...]
13 or: $dashless [--quiet] foreach [--recursive] <command>
14 or: $dashless [--quiet] sync [--] [<path>...]"
15OPTIONS_SPEC=
16. git-sh-setup
17. git-parse-remote
18require_work_tree
19command=
21branch=
22reference=
23cached=
24nofetch=
25update=
26prefix=
27# Resolve relative url by appending to parent's url
29resolve_relative_url ()
30{
31 remote=$(get_default_remote)
32 remoteurl=$(git config "remote.$remote.url") ||
33 die "remote ($remote) does not have a url defined in .git/config"
34 url="$1"
35 remoteurl=${remoteurl%/}
36 while test -n "$url"
37 do
38 case "$url" in
39 ../*)
40 url="${url#../}"
41 remoteurl="${remoteurl%/*}"
42 ;;
43 ./*)
44 url="${url#./}"
45 ;;
46 *)
47 break;;
48 esac
49 done
50 echo "$remoteurl/${url%/}"
51}
52#
54# Get submodule info for registered submodules
55# $@ = path to limit submodule list
56#
57module_list()
58{
59 git ls-files --error-unmatch --stage -- "$@" | grep '^160000 '
60}
61#
63# Map submodule path to submodule name
64#
65# $1 = path
66#
67module_name()
68{
69 # Do we have "submodule.<something>.path = $1" defined in .gitmodules file?
70 re=$(printf '%s\n' "$1" | sed -e 's/[].[^$\\*]/\\&/g')
71 name=$( git config -f .gitmodules --get-regexp '^submodule\..*\.path$' |
72 sed -n -e 's|^submodule\.\(.*\)\.path '"$re"'$|\1|p' )
73 test -z "$name" &&
74 die "No submodule mapping found in .gitmodules for path '$path'"
75 echo "$name"
76}
77#
79# Clone a submodule
80#
81# Prior to calling, cmd_update checks that a possibly existing
82# path is not a git repository.
83# Likewise, cmd_add checks that path does not exist at all,
84# since it is the location of a new submodule.
85#
86module_clone()
87{
88 path=$1
89 url=$2
90 reference="$3"
91 # If there already is a directory at the submodule path,
93 # expect it to be empty (since that is the default checkout
94 # action) and try to remove it.
95 # Note: if $path is a symlink to a directory the test will
96 # succeed but the rmdir will fail. We might want to fix this.
97 if test -d "$path"
98 then
99 rmdir "$path" 2>/dev/null ||
100 die "Directory '$path' exist, but is neither empty nor a git repository"
101 fi
102 test -e "$path" &&
104 die "A file already exist at path '$path'"
105 if test -n "$reference"
107 then
108 git-clone "$reference" -n "$url" "$path"
109 else
110 git-clone -n "$url" "$path"
111 fi ||
112 die "Clone of '$url' into submodule path '$path' failed"
113}
114#
116# Add a new submodule to the working tree, .gitmodules and the index
117#
118# $@ = repo path
119#
120# optional branch is stored in global branch variable
121#
122cmd_add()
123{
124 # parse $args after "submodule ... add".
125 while test $# -ne 0
126 do
127 case "$1" in
128 -b | --branch)
129 case "$2" in '') usage ;; esac
130 branch=$2
131 shift
132 ;;
133 -q|--quiet)
134 GIT_QUIET=1
135 ;;
136 --reference)
137 case "$2" in '') usage ;; esac
138 reference="--reference=$2"
139 shift
140 ;;
141 --reference=*)
142 reference="$1"
143 shift
144 ;;
145 --)
146 shift
147 break
148 ;;
149 -*)
150 usage
151 ;;
152 *)
153 break
154 ;;
155 esac
156 shift
157 done
158 repo=$1
160 path=$2
161 if test -z "$repo" -o -z "$path"; then
163 usage
164 fi
165 # assure repo is absolute or relative to parent
167 case "$repo" in
168 ./*|../*)
169 # dereference source url relative to parent's url
170 realrepo=$(resolve_relative_url "$repo") || exit
171 ;;
172 *:*|/*)
173 # absolute url
174 realrepo=$repo
175 ;;
176 *)
177 die "repo URL: '$repo' must be absolute or begin with ./|../"
178 ;;
179 esac
180 # normalize path:
182 # multiple //; leading ./; /./; /../; trailing /
183 path=$(printf '%s/\n' "$path" |
184 sed -e '
185 s|//*|/|g
186 s|^\(\./\)*||
187 s|/\./|/|g
188 :start
189 s|\([^/]*\)/\.\./||
190 tstart
191 s|/*$||
192 ')
193 git ls-files --error-unmatch "$path" > /dev/null 2>&1 &&
194 die "'$path' already exists in the index"
195 # perhaps the path exists and is already a git repo, else clone it
197 if test -e "$path"
198 then
199 if test -d "$path"/.git -o -f "$path"/.git
200 then
201 echo "Adding existing repo at '$path' to the index"
202 else
203 die "'$path' already exists and is not a valid git repo"
204 fi
205 case "$repo" in
207 ./*|../*)
208 url=$(resolve_relative_url "$repo") || exit
209 ;;
210 *)
211 url="$repo"
212 ;;
213 esac
214 git config submodule."$path".url "$url"
215 else
216 module_clone "$path" "$realrepo" "$reference" || exit
218 (
219 unset GIT_DIR
220 cd "$path" &&
221 # ash fails to wordsplit ${branch:+-b "$branch"...}
222 case "$branch" in
223 '') git checkout -f -q ;;
224 ?*) git checkout -f -q -b "$branch" "origin/$branch" ;;
225 esac
226 ) || die "Unable to checkout submodule '$path'"
227 fi
228 git add "$path" ||
230 die "Failed to add submodule '$path'"
231 git config -f .gitmodules submodule."$path".path "$path" &&
233 git config -f .gitmodules submodule."$path".url "$repo" &&
234 git add .gitmodules ||
235 die "Failed to register submodule '$path'"
236}
237#
239# Execute an arbitrary command sequence in each checked out
240# submodule
241#
242# $@ = command to execute
243#
244cmd_foreach()
245{
246 # parse $args after "submodule ... foreach".
247 while test $# -ne 0
248 do
249 case "$1" in
250 -q|--quiet)
251 GIT_QUIET=1
252 ;;
253 --recursive)
254 recursive=1
255 ;;
256 -*)
257 usage
258 ;;
259 *)
260 break
261 ;;
262 esac
263 shift
264 done
265 module_list |
267 while read mode sha1 stage path
268 do
269 if test -e "$path"/.git
270 then
271 say "Entering '$prefix$path'"
272 name=$(module_name "$path")
273 (
274 prefix="$prefix$path/"
275 unset GIT_DIR
276 cd "$path" &&
277 eval "$@" &&
278 if test -n "$recursive"
279 then
280 cmd_foreach "--recursive" "$@"
281 fi
282 ) ||
283 die "Stopping at '$path'; script returned non-zero status."
284 fi
285 done
286}
287#
289# Register submodules in .git/config
290#
291# $@ = requested paths (default to all)
292#
293cmd_init()
294{
295 # parse $args after "submodule ... init".
296 while test $# -ne 0
297 do
298 case "$1" in
299 -q|--quiet)
300 GIT_QUIET=1
301 ;;
302 --)
303 shift
304 break
305 ;;
306 -*)
307 usage
308 ;;
309 *)
310 break
311 ;;
312 esac
313 shift
314 done
315 module_list "$@" |
317 while read mode sha1 stage path
318 do
319 # Skip already registered paths
320 name=$(module_name "$path") || exit
321 url=$(git config submodule."$name".url)
322 test -z "$url" || continue
323 url=$(git config -f .gitmodules submodule."$name".url)
325 test -z "$url" &&
326 die "No url found for submodule path '$path' in .gitmodules"
327 # Possibly a url relative to parent
329 case "$url" in
330 ./*|../*)
331 url=$(resolve_relative_url "$url") || exit
332 ;;
333 esac
334 git config submodule."$name".url "$url" ||
336 die "Failed to register url for submodule path '$path'"
337 upd="$(git config -f .gitmodules submodule."$name".update)"
339 test -z "$upd" ||
340 git config submodule."$name".update "$upd" ||
341 die "Failed to register update mode for submodule path '$path'"
342 say "Submodule '$name' ($url) registered for path '$path'"
344 done
345}
346#
348# Update each submodule path to correct revision, using clone and checkout as needed
349#
350# $@ = requested paths (default to all)
351#
352cmd_update()
353{
354 # parse $args after "submodule ... update".
355 orig_args="$@"
356 while test $# -ne 0
357 do
358 case "$1" in
359 -q|--quiet)
360 shift
361 GIT_QUIET=1
362 ;;
363 -i|--init)
364 init=1
365 shift
366 ;;
367 -N|--no-fetch)
368 shift
369 nofetch=1
370 ;;
371 -r|--rebase)
372 shift
373 update="rebase"
374 ;;
375 --reference)
376 case "$2" in '') usage ;; esac
377 reference="--reference=$2"
378 shift 2
379 ;;
380 --reference=*)
381 reference="$1"
382 shift
383 ;;
384 -m|--merge)
385 shift
386 update="merge"
387 ;;
388 --recursive)
389 shift
390 recursive=1
391 ;;
392 --)
393 shift
394 break
395 ;;
396 -*)
397 usage
398 ;;
399 *)
400 break
401 ;;
402 esac
403 done
404 if test -n "$init"
406 then
407 cmd_init "--" "$@" || return
408 fi
409 module_list "$@" |
411 while read mode sha1 stage path
412 do
413 name=$(module_name "$path") || exit
414 url=$(git config submodule."$name".url)
415 update_module=$(git config submodule."$name".update)
416 if test -z "$url"
417 then
418 # Only mention uninitialized submodules when its
419 # path have been specified
420 test "$#" != "0" &&
421 say "Submodule path '$path' not initialized" &&
422 say "Maybe you want to use 'update --init'?"
423 continue
424 fi
425 if ! test -d "$path"/.git -o -f "$path"/.git
427 then
428 module_clone "$path" "$url" "$reference"|| exit
429 subsha1=
430 else
431 subsha1=$(unset GIT_DIR; cd "$path" &&
432 git rev-parse --verify HEAD) ||
433 die "Unable to find current revision in submodule path '$path'"
434 fi
435 if ! test -z "$update"
437 then
438 update_module=$update
439 fi
440 if test "$subsha1" != "$sha1"
442 then
443 force=
444 if test -z "$subsha1"
445 then
446 force="-f"
447 fi
448 if test -z "$nofetch"
450 then
451 (unset GIT_DIR; cd "$path" &&
452 git-fetch) ||
453 die "Unable to fetch in submodule path '$path'"
454 fi
455 case "$update_module" in
457 rebase)
458 command="git rebase"
459 action="rebase"
460 msg="rebased onto"
461 ;;
462 merge)
463 command="git merge"
464 action="merge"
465 msg="merged in"
466 ;;
467 *)
468 command="git checkout $force -q"
469 action="checkout"
470 msg="checked out"
471 ;;
472 esac
473 (unset GIT_DIR; cd "$path" && $command "$sha1") ||
475 die "Unable to $action '$sha1' in submodule path '$path'"
476 say "Submodule path '$path': $msg '$sha1'"
477 fi
478 if test -n "$recursive"
480 then
481 (unset GIT_DIR; cd "$path" && cmd_update $orig_args) ||
482 die "Failed to recurse into submodule path '$path'"
483 fi
484 done
485}
486set_name_rev () {
488 revname=$( (
489 unset GIT_DIR
490 cd "$1" && {
491 git describe "$2" 2>/dev/null ||
492 git describe --tags "$2" 2>/dev/null ||
493 git describe --contains "$2" 2>/dev/null ||
494 git describe --all --always "$2"
495 }
496 ) )
497 test -z "$revname" || revname=" ($revname)"
498}
499#
500# Show commit summary for submodules in index or working tree
501#
502# If '--cached' is given, show summary between index and given commit,
503# or between working tree and given commit
504#
505# $@ = [commit (default 'HEAD'),] requested paths (default all)
506#
507cmd_summary() {
508 summary_limit=-1
509 for_status=
510 # parse $args after "submodule ... summary".
512 while test $# -ne 0
513 do
514 case "$1" in
515 --cached)
516 cached="$1"
517 ;;
518 --for-status)
519 for_status="$1"
520 ;;
521 -n|--summary-limit)
522 if summary_limit=$(($2 + 0)) 2>/dev/null && test "$summary_limit" = "$2"
523 then
524 :
525 else
526 usage
527 fi
528 shift
529 ;;
530 --)
531 shift
532 break
533 ;;
534 -*)
535 usage
536 ;;
537 *)
538 break
539 ;;
540 esac
541 shift
542 done
543 test $summary_limit = 0 && return
545 if rev=$(git rev-parse -q --verify "$1^0")
547 then
548 head=$rev
549 shift
550 else
551 head=HEAD
552 fi
553 cd_to_toplevel
555 # Get modified modules cared by user
556 modules=$(git diff-index $cached --raw $head -- "$@" |
557 egrep '^:([0-7]* )?160000' |
558 while read mod_src mod_dst sha1_src sha1_dst status name
559 do
560 # Always show modules deleted or type-changed (blob<->module)
561 test $status = D -o $status = T && echo "$name" && continue
562 # Also show added or modified modules which are checked out
563 GIT_DIR="$name/.git" git-rev-parse --git-dir >/dev/null 2>&1 &&
564 echo "$name"
565 done
566 )
567 test -z "$modules" && return
569 git diff-index $cached --raw $head -- $modules |
571 egrep '^:([0-7]* )?160000' |
572 cut -c2- |
573 while read mod_src mod_dst sha1_src sha1_dst status name
574 do
575 if test -z "$cached" &&
576 test $sha1_dst = 0000000000000000000000000000000000000000
577 then
578 case "$mod_dst" in
579 160000)
580 sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
581 ;;
582 100644 | 100755 | 120000)
583 sha1_dst=$(git hash-object $name)
584 ;;
585 000000)
586 ;; # removed
587 *)
588 # unexpected type
589 echo >&2 "unexpected mode $mod_dst"
590 continue ;;
591 esac
592 fi
593 missing_src=
594 missing_dst=
595 test $mod_src = 160000 &&
597 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_src^0 >/dev/null &&
598 missing_src=t
599 test $mod_dst = 160000 &&
601 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_dst^0 >/dev/null &&
602 missing_dst=t
603 total_commits=
605 case "$missing_src,$missing_dst" in
606 t,)
607 errmsg=" Warn: $name doesn't contain commit $sha1_src"
608 ;;
609 ,t)
610 errmsg=" Warn: $name doesn't contain commit $sha1_dst"
611 ;;
612 t,t)
613 errmsg=" Warn: $name doesn't contain commits $sha1_src and $sha1_dst"
614 ;;
615 *)
616 errmsg=
617 total_commits=$(
618 if test $mod_src = 160000 -a $mod_dst = 160000
619 then
620 range="$sha1_src...$sha1_dst"
621 elif test $mod_src = 160000
622 then
623 range=$sha1_src
624 else
625 range=$sha1_dst
626 fi
627 GIT_DIR="$name/.git" \
628 git log --pretty=oneline --first-parent $range | wc -l
629 )
630 total_commits=" ($(($total_commits + 0)))"
631 ;;
632 esac
633 sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
635 sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
636 if test $status = T
637 then
638 if test $mod_dst = 160000
639 then
640 echo "* $name $sha1_abbr_src(blob)->$sha1_abbr_dst(submodule)$total_commits:"
641 else
642 echo "* $name $sha1_abbr_src(submodule)->$sha1_abbr_dst(blob)$total_commits:"
643 fi
644 else
645 echo "* $name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
646 fi
647 if test -n "$errmsg"
648 then
649 # Don't give error msg for modification whose dst is not submodule
650 # i.e. deleted or changed to blob
651 test $mod_dst = 160000 && echo "$errmsg"
652 else
653 if test $mod_src = 160000 -a $mod_dst = 160000
654 then
655 limit=
656 test $summary_limit -gt 0 && limit="-$summary_limit"
657 GIT_DIR="$name/.git" \
658 git log $limit --pretty='format: %m %s' \
659 --first-parent $sha1_src...$sha1_dst
660 elif test $mod_dst = 160000
661 then
662 GIT_DIR="$name/.git" \
663 git log --pretty='format: > %s' -1 $sha1_dst
664 else
665 GIT_DIR="$name/.git" \
666 git log --pretty='format: < %s' -1 $sha1_src
667 fi
668 echo
669 fi
670 echo
671 done |
672 if test -n "$for_status"; then
673 echo "# Modified submodules:"
674 echo "#"
675 sed -e 's|^|# |' -e 's|^# $|#|'
676 else
677 cat
678 fi
679}
680#
681# List all submodules, prefixed with:
682# - submodule not initialized
683# + different revision checked out
684#
685# If --cached was specified the revision in the index will be printed
686# instead of the currently checked out revision.
687#
688# $@ = requested paths (default to all)
689#
690cmd_status()
691{
692 # parse $args after "submodule ... status".
693 while test $# -ne 0
694 do
695 case "$1" in
696 -q|--quiet)
697 GIT_QUIET=1
698 ;;
699 --cached)
700 cached=1
701 ;;
702 --)
703 shift
704 break
705 ;;
706 -*)
707 usage
708 ;;
709 *)
710 break
711 ;;
712 esac
713 shift
714 done
715 module_list "$@" |
717 while read mode sha1 stage path
718 do
719 name=$(module_name "$path") || exit
720 url=$(git config submodule."$name".url)
721 if test -z "$url" || ! test -d "$path"/.git -o -f "$path"/.git
722 then
723 say "-$sha1 $path"
724 continue;
725 fi
726 set_name_rev "$path" "$sha1"
727 if git diff-files --quiet -- "$path"
728 then
729 say " $sha1 $path$revname"
730 else
731 if test -z "$cached"
732 then
733 sha1=$(unset GIT_DIR; cd "$path" && git rev-parse --verify HEAD)
734 set_name_rev "$path" "$sha1"
735 fi
736 say "+$sha1 $path$revname"
737 fi
738 done
739}
740#
741# Sync remote urls for submodules
742# This makes the value for remote.$remote.url match the value
743# specified in .gitmodules.
744#
745cmd_sync()
746{
747 while test $# -ne 0
748 do
749 case "$1" in
750 -q|--quiet)
751 GIT_QUIET=1
752 shift
753 ;;
754 --)
755 shift
756 break
757 ;;
758 -*)
759 usage
760 ;;
761 *)
762 break
763 ;;
764 esac
765 done
766 cd_to_toplevel
767 module_list "$@" |
768 while read mode sha1 stage path
769 do
770 name=$(module_name "$path")
771 url=$(git config -f .gitmodules --get submodule."$name".url)
772 # Possibly a url relative to parent
774 case "$url" in
775 ./*|../*)
776 url=$(resolve_relative_url "$url") || exit
777 ;;
778 esac
779 if test -e "$path"/.git
781 then
782 (
783 unset GIT_DIR
784 cd "$path"
785 remote=$(get_default_remote)
786 say "Synchronizing submodule url for '$name'"
787 git config remote."$remote".url "$url"
788 )
789 fi
790 done
791}
792# This loop parses the command line arguments to find the
794# subcommand name to dispatch. Parsing of the subcommand specific
795# options are primarily done by the subcommand implementations.
796# Subcommand specific options such as --branch and --cached are
797# parsed here as well, for backward compatibility.
798while test $# != 0 && test -z "$command"
800do
801 case "$1" in
802 add | foreach | init | update | status | summary | sync)
803 command=$1
804 ;;
805 -q|--quiet)
806 GIT_QUIET=1
807 ;;
808 -b|--branch)
809 case "$2" in
810 '')
811 usage
812 ;;
813 esac
814 branch="$2"; shift
815 ;;
816 --cached)
817 cached="$1"
818 ;;
819 --)
820 break
821 ;;
822 -*)
823 usage
824 ;;
825 *)
826 break
827 ;;
828 esac
829 shift
830done
831# No command word defaults to "status"
833test -n "$command" || command=status
834# "-b branch" is accepted only by "add"
836if test -n "$branch" && test "$command" != add
837then
838 usage
839fi
840# "--cached" is accepted only by "status" and "summary"
842if test -n "$cached" && test "$command" != status -a "$command" != summary
843then
844 usage
845fi
846"cmd_$command" "$@"