Fix potentially dangerous uses of mkpath and git_path
[git/jnareb-git.git] / git-submodule.sh
blobb63e5c30874bfa382c7d6d0ca1942d116930b62a
1 #!/bin/sh
3 # git-submodules.sh: add, init, update or list git submodules
5 # Copyright (c) 2007 Lars Hjemli
7 USAGE="[--quiet] [--cached] \
8 [add <repo> [-b branch] <path>]|[status|init|update [-i|--init]|summary [-n|--summary-limit <n>] [<commit>]] \
9 [--] [<path>...]|[foreach <command>]|[sync [--] [<path>...]]"
10 OPTIONS_SPEC=
11 . git-sh-setup
12 . git-parse-remote
13 require_work_tree
15 command=
16 branch=
17 quiet=
18 cached=
21 # print stuff on stdout unless -q was specified
23 say()
25 if test -z "$quiet"
26 then
27 echo "$@"
31 # Resolve relative url by appending to parent's url
32 resolve_relative_url ()
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 "$url"
41 case "$url" in
42 ../*)
43 url="${url#../}"
44 remoteurl="${remoteurl%/*}"
46 ./*)
47 url="${url#./}"
50 break;;
51 esac
52 done
53 echo "$remoteurl/${url%/}"
57 # Get submodule info for registered submodules
58 # $@ = path to limit submodule list
60 module_list()
62 git ls-files --stage -- "$@" | grep '^160000 '
66 # Map submodule path to submodule name
68 # $1 = path
70 module_name()
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"
82 # Clone a submodule
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.
89 module_clone()
91 path=$1
92 url=$2
94 # If there already is a directory at the submodule path,
95 # expect it to be empty (since that is the default checkout
96 # action) and try to remove it.
97 # Note: if $path is a symlink to a directory the test will
98 # succeed but the rmdir will fail. We might want to fix this.
99 if test -d "$path"
100 then
101 rmdir "$path" 2>/dev/null ||
102 die "Directory '$path' exist, but is neither empty nor a git repository"
105 test -e "$path" &&
106 die "A file already exist at path '$path'"
108 git-clone -n "$url" "$path" ||
109 die "Clone of '$url' into submodule path '$path' failed"
113 # Add a new submodule to the working tree, .gitmodules and the index
115 # $@ = repo path
117 # optional branch is stored in global branch variable
119 cmd_add()
121 # parse $args after "submodule ... add".
122 while test $# -ne 0
124 case "$1" in
125 -b | --branch)
126 case "$2" in '') usage ;; esac
127 branch=$2
128 shift
130 -q|--quiet)
131 quiet=1
134 shift
135 break
138 usage
141 break
143 esac
144 shift
145 done
147 repo=$1
148 path=$2
150 if test -z "$repo" -o -z "$path"; then
151 usage
154 # assure repo is absolute or relative to parent
155 case "$repo" in
156 ./*|../*)
157 # dereference source url relative to parent's url
158 realrepo=$(resolve_relative_url "$repo") || exit
160 *:*|/*)
161 # absolute url
162 realrepo=$repo
165 die "repo URL: '$repo' must be absolute or begin with ./|../"
167 esac
169 # strip trailing slashes from path
170 path=$(echo "$path" | sed -e 's|/*$||')
172 git ls-files --error-unmatch "$path" > /dev/null 2>&1 &&
173 die "'$path' already exists in the index"
175 # perhaps the path exists and is already a git repo, else clone it
176 if test -e "$path"
177 then
178 if test -d "$path"/.git -o -f "$path"/.git
179 then
180 echo "Adding existing repo at '$path' to the index"
181 else
182 die "'$path' already exists and is not a valid git repo"
185 case "$repo" in
186 ./*|../*)
187 url=$(resolve_relative_url "$repo") || exit
190 url="$repo"
192 esac
193 git config submodule."$path".url "$url"
194 else
196 module_clone "$path" "$realrepo" || exit
197 (unset GIT_DIR; cd "$path" && git checkout -f -q ${branch:+-b "$branch" "origin/$branch"}) ||
198 die "Unable to checkout submodule '$path'"
201 git add "$path" ||
202 die "Failed to add submodule '$path'"
204 git config -f .gitmodules submodule."$path".path "$path" &&
205 git config -f .gitmodules submodule."$path".url "$repo" &&
206 git add .gitmodules ||
207 die "Failed to register submodule '$path'"
211 # Execute an arbitrary command sequence in each checked out
212 # submodule
214 # $@ = command to execute
216 cmd_foreach()
218 module_list |
219 while read mode sha1 stage path
221 if test -e "$path"/.git
222 then
223 say "Entering '$path'"
224 (cd "$path" && eval "$@") ||
225 die "Stopping at '$path'; script returned non-zero status."
227 done
231 # Register submodules in .git/config
233 # $@ = requested paths (default to all)
235 cmd_init()
237 # parse $args after "submodule ... init".
238 while test $# -ne 0
240 case "$1" in
241 -q|--quiet)
242 quiet=1
245 shift
246 break
249 usage
252 break
254 esac
255 shift
256 done
258 module_list "$@" |
259 while read mode sha1 stage path
261 # Skip already registered paths
262 name=$(module_name "$path") || exit
263 url=$(git config submodule."$name".url)
264 test -z "$url" || continue
266 url=$(git config -f .gitmodules submodule."$name".url)
267 test -z "$url" &&
268 die "No url found for submodule path '$path' in .gitmodules"
270 # Possibly a url relative to parent
271 case "$url" in
272 ./*|../*)
273 url=$(resolve_relative_url "$url") || exit
275 esac
277 git config submodule."$name".url "$url" ||
278 die "Failed to register url for submodule path '$path'"
280 say "Submodule '$name' ($url) registered for path '$path'"
281 done
285 # Update each submodule path to correct revision, using clone and checkout as needed
287 # $@ = requested paths (default to all)
289 cmd_update()
291 # parse $args after "submodule ... update".
292 while test $# -ne 0
294 case "$1" in
295 -q|--quiet)
296 shift
297 quiet=1
299 -i|--init)
300 shift
301 cmd_init "$@" || return
304 shift
305 break
308 usage
311 break
313 esac
314 done
316 module_list "$@" |
317 while read mode sha1 stage path
319 name=$(module_name "$path") || exit
320 url=$(git config submodule."$name".url)
321 if test -z "$url"
322 then
323 # Only mention uninitialized submodules when its
324 # path have been specified
325 test "$#" != "0" &&
326 say "Submodule path '$path' not initialized"
327 say "Maybe you want to use 'update --init'?"
328 continue
331 if ! test -d "$path"/.git -o -f "$path"/.git
332 then
333 module_clone "$path" "$url" || exit
334 subsha1=
335 else
336 subsha1=$(unset GIT_DIR; cd "$path" &&
337 git rev-parse --verify HEAD) ||
338 die "Unable to find current revision in submodule path '$path'"
341 if test "$subsha1" != "$sha1"
342 then
343 force=
344 if test -z "$subsha1"
345 then
346 force="-f"
348 (unset GIT_DIR; cd "$path" && git-fetch &&
349 git-checkout $force -q "$sha1") ||
350 die "Unable to checkout '$sha1' in submodule path '$path'"
352 say "Submodule path '$path': checked out '$sha1'"
354 done
357 set_name_rev () {
358 revname=$( (
359 unset GIT_DIR
360 cd "$1" && {
361 git describe "$2" 2>/dev/null ||
362 git describe --tags "$2" 2>/dev/null ||
363 git describe --contains "$2" 2>/dev/null ||
364 git describe --all --always "$2"
367 test -z "$revname" || revname=" ($revname)"
370 # Show commit summary for submodules in index or working tree
372 # If '--cached' is given, show summary between index and given commit,
373 # or between working tree and given commit
375 # $@ = [commit (default 'HEAD'),] requested paths (default all)
377 cmd_summary() {
378 summary_limit=-1
379 for_status=
381 # parse $args after "submodule ... summary".
382 while test $# -ne 0
384 case "$1" in
385 --cached)
386 cached="$1"
388 --for-status)
389 for_status="$1"
391 -n|--summary-limit)
392 if summary_limit=$(($2 + 0)) 2>/dev/null && test "$summary_limit" = "$2"
393 then
395 else
396 usage
398 shift
401 shift
402 break
405 usage
408 break
410 esac
411 shift
412 done
414 test $summary_limit = 0 && return
416 if rev=$(git rev-parse --verify "$1^0" 2>/dev/null)
417 then
418 head=$rev
419 shift
420 else
421 head=HEAD
424 cd_to_toplevel
425 # Get modified modules cared by user
426 modules=$(git diff-index $cached --raw $head -- "$@" |
427 egrep '^:([0-7]* )?160000' |
428 while read mod_src mod_dst sha1_src sha1_dst status name
430 # Always show modules deleted or type-changed (blob<->module)
431 test $status = D -o $status = T && echo "$name" && continue
432 # Also show added or modified modules which are checked out
433 GIT_DIR="$name/.git" git-rev-parse --git-dir >/dev/null 2>&1 &&
434 echo "$name"
435 done
438 test -z "$modules" && return
440 git diff-index $cached --raw $head -- $modules |
441 egrep '^:([0-7]* )?160000' |
442 cut -c2- |
443 while read mod_src mod_dst sha1_src sha1_dst status name
445 if test -z "$cached" &&
446 test $sha1_dst = 0000000000000000000000000000000000000000
447 then
448 case "$mod_dst" in
449 160000)
450 sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
452 100644 | 100755 | 120000)
453 sha1_dst=$(git hash-object $name)
455 000000)
456 ;; # removed
458 # unexpected type
459 echo >&2 "unexpected mode $mod_dst"
460 continue ;;
461 esac
463 missing_src=
464 missing_dst=
466 test $mod_src = 160000 &&
467 ! GIT_DIR="$name/.git" git-rev-parse --verify $sha1_src^0 >/dev/null 2>&1 &&
468 missing_src=t
470 test $mod_dst = 160000 &&
471 ! GIT_DIR="$name/.git" git-rev-parse --verify $sha1_dst^0 >/dev/null 2>&1 &&
472 missing_dst=t
474 total_commits=
475 case "$missing_src,$missing_dst" in
477 errmsg=" Warn: $name doesn't contain commit $sha1_src"
480 errmsg=" Warn: $name doesn't contain commit $sha1_dst"
482 t,t)
483 errmsg=" Warn: $name doesn't contain commits $sha1_src and $sha1_dst"
486 errmsg=
487 total_commits=$(
488 if test $mod_src = 160000 -a $mod_dst = 160000
489 then
490 range="$sha1_src...$sha1_dst"
491 elif test $mod_src = 160000
492 then
493 range=$sha1_src
494 else
495 range=$sha1_dst
497 GIT_DIR="$name/.git" \
498 git log --pretty=oneline --first-parent $range | wc -l
500 total_commits=" ($(($total_commits + 0)))"
502 esac
504 sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
505 sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
506 if test $status = T
507 then
508 if test $mod_dst = 160000
509 then
510 echo "* $name $sha1_abbr_src(blob)->$sha1_abbr_dst(submodule)$total_commits:"
511 else
512 echo "* $name $sha1_abbr_src(submodule)->$sha1_abbr_dst(blob)$total_commits:"
514 else
515 echo "* $name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
517 if test -n "$errmsg"
518 then
519 # Don't give error msg for modification whose dst is not submodule
520 # i.e. deleted or changed to blob
521 test $mod_dst = 160000 && echo "$errmsg"
522 else
523 if test $mod_src = 160000 -a $mod_dst = 160000
524 then
525 limit=
526 test $summary_limit -gt 0 && limit="-$summary_limit"
527 GIT_DIR="$name/.git" \
528 git log $limit --pretty='format: %m %s' \
529 --first-parent $sha1_src...$sha1_dst
530 elif test $mod_dst = 160000
531 then
532 GIT_DIR="$name/.git" \
533 git log --pretty='format: > %s' -1 $sha1_dst
534 else
535 GIT_DIR="$name/.git" \
536 git log --pretty='format: < %s' -1 $sha1_src
538 echo
540 echo
541 done |
542 if test -n "$for_status"; then
543 echo "# Modified submodules:"
544 echo "#"
545 sed -e 's|^|# |' -e 's|^# $|#|'
546 else
551 # List all submodules, prefixed with:
552 # - submodule not initialized
553 # + different revision checked out
555 # If --cached was specified the revision in the index will be printed
556 # instead of the currently checked out revision.
558 # $@ = requested paths (default to all)
560 cmd_status()
562 # parse $args after "submodule ... status".
563 while test $# -ne 0
565 case "$1" in
566 -q|--quiet)
567 quiet=1
569 --cached)
570 cached=1
573 shift
574 break
577 usage
580 break
582 esac
583 shift
584 done
586 module_list "$@" |
587 while read mode sha1 stage path
589 name=$(module_name "$path") || exit
590 url=$(git config submodule."$name".url)
591 if test -z "$url" || ! test -d "$path"/.git -o -f "$path"/.git
592 then
593 say "-$sha1 $path"
594 continue;
596 set_name_rev "$path" "$sha1"
597 if git diff-files --quiet -- "$path"
598 then
599 say " $sha1 $path$revname"
600 else
601 if test -z "$cached"
602 then
603 sha1=$(unset GIT_DIR; cd "$path" && git rev-parse --verify HEAD)
604 set_name_rev "$path" "$sha1"
606 say "+$sha1 $path$revname"
608 done
611 # Sync remote urls for submodules
612 # This makes the value for remote.$remote.url match the value
613 # specified in .gitmodules.
615 cmd_sync()
617 while test $# -ne 0
619 case "$1" in
620 -q|--quiet)
621 quiet=1
622 shift
625 shift
626 break
629 usage
632 break
634 esac
635 done
636 cd_to_toplevel
637 module_list "$@" |
638 while read mode sha1 stage path
640 name=$(module_name "$path")
641 url=$(git config -f .gitmodules --get submodule."$name".url)
643 # Possibly a url relative to parent
644 case "$url" in
645 ./*|../*)
646 url=$(resolve_relative_url "$url") || exit
648 esac
650 if test -e "$path"/.git
651 then
653 unset GIT_DIR
654 cd "$path"
655 remote=$(get_default_remote)
656 say "Synchronizing submodule url for '$name'"
657 git config remote."$remote".url "$url"
660 done
663 # This loop parses the command line arguments to find the
664 # subcommand name to dispatch. Parsing of the subcommand specific
665 # options are primarily done by the subcommand implementations.
666 # Subcommand specific options such as --branch and --cached are
667 # parsed here as well, for backward compatibility.
669 while test $# != 0 && test -z "$command"
671 case "$1" in
672 add | foreach | init | update | status | summary | sync)
673 command=$1
675 -q|--quiet)
676 quiet=1
678 -b|--branch)
679 case "$2" in
681 usage
683 esac
684 branch="$2"; shift
686 --cached)
687 cached="$1"
690 break
693 usage
696 break
698 esac
699 shift
700 done
702 # No command word defaults to "status"
703 test -n "$command" || command=status
705 # "-b branch" is accepted only by "add"
706 if test -n "$branch" && test "$command" != add
707 then
708 usage
711 # "--cached" is accepted only by "status" and "summary"
712 if test -n "$cached" && test "$command" != status -a "$command" != summary
713 then
714 usage
717 "cmd_$command" "$@"