git.oblomov.eu Git - git/blob - git-submodule.sh

   1 #!/bin/sh
   2 #
   3 # git-submodule.sh: add, init, update or list git submodules
   4 #
   5 # Copyright (c) 2007 Lars Hjemli
   6
   7 dashless=$(basename "$0" | sed -e 's/-/ /')
   8 USAGE="[--quiet] add [-b branch] [-f|--force] [--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] [-f|--force] [--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: $dashless [--quiet] sync [--] [<path>...]"
  15 OPTIONS_SPEC=
  16 . git-sh-setup
  17 . git-sh-i18n
  18 . git-parse-remote
  19 require_work_tree
  20
  21 command=
  22 branch=
  23 force=
  24 reference=
  25 cached=
  26 recursive=
  27 init=
  28 files=
  29 nofetch=
  30 update=
  31 prefix=
  32
  33 # The function takes at most 2 arguments. The first argument is the
  34 # URL that navigates to the submodule origin repo. When relative, this URL
  35 # is relative to the superproject origin URL repo. The second up_path
  36 # argument, if specified, is the relative path that navigates
  37 # from the submodule working tree to the superproject working tree.
  38 #
  39 # The output of the function is the origin URL of the submodule.
  40 #
  41 # The output will either be an absolute URL or filesystem path (if the
  42 # superproject origin URL is an absolute URL or filesystem path,
  43 # respectively) or a relative file system path (if the superproject
  44 # origin URL is a relative file system path).
  45 #
  46 # When the output is a relative file system path, the path is either
  47 # relative to the submodule working tree, if up_path is specified, or to
  48 # the superproject working tree otherwise.
  49 resolve_relative_url ()
  50 {
  51         remote=$(get_default_remote)
  52         remoteurl=$(git config "remote.$remote.url") ||
  53                 remoteurl=$(pwd) # the repository is its own authoritative upstream
  54         url="$1"
  55         remoteurl=${remoteurl%/}
  56         sep=/
  57         up_path="$2"
  58
  59         case "$remoteurl" in
  60         *:*|/*)
  61                 is_relative=
  62                 ;;
  63         ./*|../*)
  64                 is_relative=t
  65                 ;;
  66         *)
  67                 is_relative=t
  68                 remoteurl="./$remoteurl"
  69                 ;;
  70         esac
  71
  72         while test -n "$url"
  73         do
  74                 case "$url" in
  75                 ../*)
  76                         url="${url#../}"
  77                         case "$remoteurl" in
  78                         */*)
  79                                 remoteurl="${remoteurl%/*}"
  80                                 ;;
  81                         *:*)
  82                                 remoteurl="${remoteurl%:*}"
  83                                 sep=:
  84                                 ;;
  85                         *)
  86                                 if test -z "$is_relative" || test "." = "$remoteurl"
  87                                 then
  88                                         die "$(eval_gettext "cannot strip one component off url '\$remoteurl'")"
  89                                 else
  90                                         remoteurl=.
  91                                 fi
  92                                 ;;
  93                         esac
  94                         ;;
  95                 ./*)
  96                         url="${url#./}"
  97                         ;;
  98                 *)
  99                         break;;
 100                 esac
 101         done
 102         remoteurl="$remoteurl$sep${url%/}"
 103         echo "${is_relative:+${up_path}}${remoteurl#./}"
 104 }
 105
 106 #
 107 # Get submodule info for registered submodules
 108 # $@ = path to limit submodule list
 109 #
 110 module_list()
 111 {
 112         git ls-files --error-unmatch --stage -- "$@" |
 113         perl -e '
 114         my %unmerged = ();
 115         my ($null_sha1) = ("0" x 40);
 116         while (<STDIN>) {
 117                 chomp;
 118                 my ($mode, $sha1, $stage, $path) =
 119                         /^([0-7]+) ([0-9a-f]{40}) ([0-3])\t(.*)$/;
 120                 next unless $mode eq "160000";
 121                 if ($stage ne "0") {
 122                         if (!$unmerged{$path}++) {
 123                                 print "$mode $null_sha1 U\t$path\n";
 124                         }
 125                         next;
 126                 }
 127                 print "$_\n";
 128         }
 129         '
 130 }
 131
 132 #
 133 # Map submodule path to submodule name
 134 #
 135 # $1 = path
 136 #
 137 module_name()
 138 {
 139         # Do we have "submodule.<something>.path = $1" defined in .gitmodules file?
 140         sm_path="$1"
 141         re=$(printf '%s\n' "$1" | sed -e 's/[].[^$\\*]/\\&/g')
 142         name=$( git config -f .gitmodules --get-regexp '^submodule\..*\.path$' |
 143                 sed -n -e 's|^submodule\.\(.*\)\.path '"$re"'$|\1|p' )
 144         test -z "$name" &&
 145         die "$(eval_gettext "No submodule mapping found in .gitmodules for path '\$sm_path'")"
 146         echo "$name"
 147 }
 148
 149 #
 150 # Clone a submodule
 151 #
 152 # Prior to calling, cmd_update checks that a possibly existing
 153 # path is not a git repository.
 154 # Likewise, cmd_add checks that path does not exist at all,
 155 # since it is the location of a new submodule.
 156 #
 157 module_clone()
 158 {
 159         sm_path=$1
 160         url=$2
 161         reference="$3"
 162         quiet=
 163         if test -n "$GIT_QUIET"
 164         then
 165                 quiet=-q
 166         fi
 167
 168         gitdir=
 169         gitdir_base=
 170         name=$(module_name "$sm_path" 2>/dev/null)
 171         test -n "$name" || name="$sm_path"
 172         base_name=$(dirname "$name")
 173
 174         gitdir=$(git rev-parse --git-dir)
 175         gitdir_base="$gitdir/modules/$base_name"
 176         gitdir="$gitdir/modules/$name"
 177
 178         if test -d "$gitdir"
 179         then
 180                 mkdir -p "$sm_path"
 181                 rm -f "$gitdir/index"
 182         else
 183                 mkdir -p "$gitdir_base"
 184                 git clone $quiet -n ${reference:+"$reference"} \
 185                         --separate-git-dir "$gitdir" "$url" "$sm_path" ||
 186                 die "$(eval_gettext "Clone of '\$url' into submodule path '\$sm_path' failed")"
 187         fi
 188
 189         a=$(cd "$gitdir" && pwd)/
 190         b=$(cd "$sm_path" && pwd)/
 191         # normalize Windows-style absolute paths to POSIX-style absolute paths
 192         case $a in [a-zA-Z]:/*) a=/${a%%:*}${a#*:} ;; esac
 193         case $b in [a-zA-Z]:/*) b=/${b%%:*}${b#*:} ;; esac
 194         # Remove all common leading directories after a sanity check
 195         if test "${a#$b}" != "$a" || test "${b#$a}" != "$b"; then
 196                 die "$(eval_gettext "Gitdir '\$a' is part of the submodule path '\$b' or vice versa")"
 197         fi
 198         while test "${a%%/*}" = "${b%%/*}"
 199         do
 200                 a=${a#*/}
 201                 b=${b#*/}
 202         done
 203         # Now chop off the trailing '/'s that were added in the beginning
 204         a=${a%/}
 205         b=${b%/}
 206
 207         # Turn each leading "*/" component into "../"
 208         rel=$(echo $b | sed -e 's|[^/][^/]*|..|g')
 209         echo "gitdir: $rel/$a" >"$sm_path/.git"
 210
 211         rel=$(echo $a | sed -e 's|[^/][^/]*|..|g')
 212         (clear_local_git_env; cd "$sm_path" && GIT_WORK_TREE=. git config core.worktree "$rel/$b")
 213 }
 214
 215 #
 216 # Add a new submodule to the working tree, .gitmodules and the index
 217 #
 218 # $@ = repo path
 219 #
 220 # optional branch is stored in global branch variable
 221 #
 222 cmd_add()
 223 {
 224         # parse $args after "submodule ... add".
 225         while test $# -ne 0
 226         do
 227                 case "$1" in
 228                 -b | --branch)
 229                         case "$2" in '') usage ;; esac
 230                         branch=$2
 231                         shift
 232                         ;;
 233                 -f | --force)
 234                         force=$1
 235                         ;;
 236                 -q|--quiet)
 237                         GIT_QUIET=1
 238                         ;;
 239                 --reference)
 240                         case "$2" in '') usage ;; esac
 241                         reference="--reference=$2"
 242                         shift
 243                         ;;
 244                 --reference=*)
 245                         reference="$1"
 246                         shift
 247                         ;;
 248                 --)
 249                         shift
 250                         break
 251                         ;;
 252                 -*)
 253                         usage
 254                         ;;
 255                 *)
 256                         break
 257                         ;;
 258                 esac
 259                 shift
 260         done
 261
 262         repo=$1
 263         sm_path=$2
 264
 265         if test -z "$sm_path"; then
 266                 sm_path=$(echo "$repo" |
 267                         sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
 268         fi
 269
 270         if test -z "$repo" -o -z "$sm_path"; then
 271                 usage
 272         fi
 273
 274         # assure repo is absolute or relative to parent
 275         case "$repo" in
 276         ./*|../*)
 277                 # dereference source url relative to parent's url
 278                 realrepo=$(resolve_relative_url "$repo") || exit
 279                 ;;
 280         *:*|/*)
 281                 # absolute url
 282                 realrepo=$repo
 283                 ;;
 284         *)
 285                 die "$(eval_gettext "repo URL: '\$repo' must be absolute or begin with ./|../")"
 286         ;;
 287         esac
 288
 289         # normalize path:
 290         # multiple //; leading ./; /./; /../; trailing /
 291         sm_path=$(printf '%s/\n' "$sm_path" |
 292                 sed -e '
 293                         s|//*|/|g
 294                         s|^\(\./\)*||
 295                         s|/\./|/|g
 296                         :start
 297                         s|\([^/]*\)/\.\./||
 298                         tstart
 299                         s|/*$||
 300                 ')
 301         git ls-files --error-unmatch "$sm_path" > /dev/null 2>&1 &&
 302         die "$(eval_gettext "'\$sm_path' already exists in the index")"
 303
 304         if test -z "$force" && ! git add --dry-run --ignore-missing "$sm_path" > /dev/null 2>&1
 305         then
 306                 eval_gettextln "The following path is ignored by one of your .gitignore files:
 307 \$sm_path
 308 Use -f if you really want to add it." >&2
 309                 exit 1
 310         fi
 311
 312         # perhaps the path exists and is already a git repo, else clone it
 313         if test -e "$sm_path"
 314         then
 315                 if test -d "$sm_path"/.git -o -f "$sm_path"/.git
 316                 then
 317                         eval_gettextln "Adding existing repo at '\$sm_path' to the index"
 318                 else
 319                         die "$(eval_gettext "'\$sm_path' already exists and is not a valid git repo")"
 320                 fi
 321
 322         else
 323
 324                 module_clone "$sm_path" "$realrepo" "$reference" || exit
 325                 (
 326                         clear_local_git_env
 327                         cd "$sm_path" &&
 328                         # ash fails to wordsplit ${branch:+-b "$branch"...}
 329                         case "$branch" in
 330                         '') git checkout -f -q ;;
 331                         ?*) git checkout -f -q -B "$branch" "origin/$branch" ;;
 332                         esac
 333                 ) || die "$(eval_gettext "Unable to checkout submodule '\$sm_path'")"
 334         fi
 335         git config submodule."$sm_path".url "$realrepo"
 336
 337         git add $force "$sm_path" ||
 338         die "$(eval_gettext "Failed to add submodule '\$sm_path'")"
 339
 340         git config -f .gitmodules submodule."$sm_path".path "$sm_path" &&
 341         git config -f .gitmodules submodule."$sm_path".url "$repo" &&
 342         git add --force .gitmodules ||
 343         die "$(eval_gettext "Failed to register submodule '\$sm_path'")"
 344 }
 345
 346 #
 347 # Execute an arbitrary command sequence in each checked out
 348 # submodule
 349 #
 350 # $@ = command to execute
 351 #
 352 cmd_foreach()
 353 {
 354         # parse $args after "submodule ... foreach".
 355         while test $# -ne 0
 356         do
 357                 case "$1" in
 358                 -q|--quiet)
 359                         GIT_QUIET=1
 360                         ;;
 361                 --recursive)
 362                         recursive=1
 363                         ;;
 364                 -*)
 365                         usage
 366                         ;;
 367                 *)
 368                         break
 369                         ;;
 370                 esac
 371                 shift
 372         done
 373
 374         toplevel=$(pwd)
 375
 376         # dup stdin so that it can be restored when running the external
 377         # command in the subshell (and a recursive call to this function)
 378         exec 3<&0
 379
 380         module_list |
 381         while read mode sha1 stage sm_path
 382         do
 383                 if test -e "$sm_path"/.git
 384                 then
 385                         say "$(eval_gettext "Entering '\$prefix\$sm_path'")"
 386                         name=$(module_name "$sm_path")
 387                         (
 388                                 prefix="$prefix$sm_path/"
 389                                 clear_local_git_env
 390                                 # we make $path available to scripts ...
 391                                 path=$sm_path
 392                                 cd "$sm_path" &&
 393                                 eval "$@" &&
 394                                 if test -n "$recursive"
 395                                 then
 396                                         cmd_foreach "--recursive" "$@"
 397                                 fi
 398                         ) <&3 3<&- ||
 399                         die "$(eval_gettext "Stopping at '\$sm_path'; script returned non-zero status.")"
 400                 fi
 401         done
 402 }
 403
 404 #
 405 # Register submodules in .git/config
 406 #
 407 # $@ = requested paths (default to all)
 408 #
 409 cmd_init()
 410 {
 411         # parse $args after "submodule ... init".
 412         while test $# -ne 0
 413         do
 414                 case "$1" in
 415                 -q|--quiet)
 416                         GIT_QUIET=1
 417                         ;;
 418                 --)
 419                         shift
 420                         break
 421                         ;;
 422                 -*)
 423                         usage
 424                         ;;
 425                 *)
 426                         break
 427                         ;;
 428                 esac
 429                 shift
 430         done
 431
 432         module_list "$@" |
 433         while read mode sha1 stage sm_path
 434         do
 435                 name=$(module_name "$sm_path") || exit
 436
 437                 # Copy url setting when it is not set yet
 438                 if test -z "$(git config "submodule.$name.url")"
 439                 then
 440                         url=$(git config -f .gitmodules submodule."$name".url)
 441                         test -z "$url" &&
 442                         die "$(eval_gettext "No url found for submodule path '\$sm_path' in .gitmodules")"
 443
 444                         # Possibly a url relative to parent
 445                         case "$url" in
 446                         ./*|../*)
 447                                 url=$(resolve_relative_url "$url") || exit
 448                                 ;;
 449                         esac
 450                         git config submodule."$name".url "$url" ||
 451                         die "$(eval_gettext "Failed to register url for submodule path '\$sm_path'")"
 452
 453                         say "$(eval_gettext "Submodule '\$name' (\$url) registered for path '\$sm_path'")"
 454                 fi
 455
 456                 # Copy "update" setting when it is not set yet
 457                 upd="$(git config -f .gitmodules submodule."$name".update)"
 458                 test -z "$upd" ||
 459                 test -n "$(git config submodule."$name".update)" ||
 460                 git config submodule."$name".update "$upd" ||
 461                 die "$(eval_gettext "Failed to register update mode for submodule path '\$sm_path'")"
 462         done
 463 }
 464
 465 #
 466 # Update each submodule path to correct revision, using clone and checkout as needed
 467 #
 468 # $@ = requested paths (default to all)
 469 #
 470 cmd_update()
 471 {
 472         # parse $args after "submodule ... update".
 473         orig_flags=
 474         while test $# -ne 0
 475         do
 476                 case "$1" in
 477                 -q|--quiet)
 478                         GIT_QUIET=1
 479                         ;;
 480                 -i|--init)
 481                         init=1
 482                         ;;
 483                 -N|--no-fetch)
 484                         nofetch=1
 485                         ;;
 486                 -f|--force)
 487                         force=$1
 488                         ;;
 489                 -r|--rebase)
 490                         update="rebase"
 491                         ;;
 492                 --reference)
 493                         case "$2" in '') usage ;; esac
 494                         reference="--reference=$2"
 495                         orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 496                         shift
 497                         ;;
 498                 --reference=*)
 499                         reference="$1"
 500                         ;;
 501                 -m|--merge)
 502                         update="merge"
 503                         ;;
 504                 --recursive)
 505                         recursive=1
 506                         ;;
 507                 --checkout)
 508                         update="checkout"
 509                         ;;
 510                 --)
 511                         shift
 512                         break
 513                         ;;
 514                 -*)
 515                         usage
 516                         ;;
 517                 *)
 518                         break
 519                         ;;
 520                 esac
 521                 orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 522                 shift
 523         done
 524
 525         if test -n "$init"
 526         then
 527                 cmd_init "--" "$@" || return
 528         fi
 529
 530         cloned_modules=
 531         module_list "$@" | {
 532         err=
 533         while read mode sha1 stage sm_path
 534         do
 535                 if test "$stage" = U
 536                 then
 537                         echo >&2 "Skipping unmerged submodule $sm_path"
 538                         continue
 539                 fi
 540                 name=$(module_name "$sm_path") || exit
 541                 url=$(git config submodule."$name".url)
 542                 if ! test -z "$update"
 543                 then
 544                         update_module=$update
 545                 else
 546                         update_module=$(git config submodule."$name".update)
 547                 fi
 548
 549                 if test "$update_module" = "none"
 550                 then
 551                         echo "Skipping submodule '$sm_path'"
 552                         continue
 553                 fi
 554
 555                 if test -z "$url"
 556                 then
 557                         # Only mention uninitialized submodules when its
 558                         # path have been specified
 559                         test "$#" != "0" &&
 560                         say "$(eval_gettext "Submodule path '\$sm_path' not initialized
 561 Maybe you want to use 'update --init'?")"
 562                         continue
 563                 fi
 564
 565                 if ! test -d "$sm_path"/.git -o -f "$sm_path"/.git
 566                 then
 567                         module_clone "$sm_path" "$url" "$reference"|| exit
 568                         cloned_modules="$cloned_modules;$name"
 569                         subsha1=
 570                 else
 571                         subsha1=$(clear_local_git_env; cd "$sm_path" &&
 572                                 git rev-parse --verify HEAD) ||
 573                         die "$(eval_gettext "Unable to find current revision in submodule path '\$sm_path'")"
 574                 fi
 575
 576                 if test "$subsha1" != "$sha1"
 577                 then
 578                         subforce=$force
 579                         # If we don't already have a -f flag and the submodule has never been checked out
 580                         if test -z "$subsha1" -a -z "$force"
 581                         then
 582                                 subforce="-f"
 583                         fi
 584
 585                         if test -z "$nofetch"
 586                         then
 587                                 # Run fetch only if $sha1 isn't present or it
 588                                 # is not reachable from a ref.
 589                                 (clear_local_git_env; cd "$sm_path" &&
 590                                         ( (rev=$(git rev-list -n 1 $sha1 --not --all 2>/dev/null) &&
 591                                          test -z "$rev") || git-fetch)) ||
 592                                 die "$(eval_gettext "Unable to fetch in submodule path '\$sm_path'")"
 593                         fi
 594
 595                         # Is this something we just cloned?
 596                         case ";$cloned_modules;" in
 597                         *";$name;"*)
 598                                 # then there is no local change to integrate
 599                                 update_module= ;;
 600                         esac
 601
 602                         must_die_on_failure=
 603                         case "$update_module" in
 604                         rebase)
 605                                 command="git rebase"
 606                                 die_msg="$(eval_gettext "Unable to rebase '\$sha1' in submodule path '\$sm_path'")"
 607                                 say_msg="$(eval_gettext "Submodule path '\$sm_path': rebased into '\$sha1'")"
 608                                 must_die_on_failure=yes
 609                                 ;;
 610                         merge)
 611                                 command="git merge"
 612                                 die_msg="$(eval_gettext "Unable to merge '\$sha1' in submodule path '\$sm_path'")"
 613                                 say_msg="$(eval_gettext "Submodule path '\$sm_path': merged in '\$sha1'")"
 614                                 must_die_on_failure=yes
 615                                 ;;
 616                         *)
 617                                 command="git checkout $subforce -q"
 618                                 die_msg="$(eval_gettext "Unable to checkout '\$sha1' in submodule path '\$sm_path'")"
 619                                 say_msg="$(eval_gettext "Submodule path '\$sm_path': checked out '\$sha1'")"
 620                                 ;;
 621                         esac
 622
 623                         if (clear_local_git_env; cd "$sm_path" && $command "$sha1")
 624                         then
 625                                 say "$say_msg"
 626                         elif test -n "$must_die_on_failure"
 627                         then
 628                                 die_with_status 2 "$die_msg"
 629                         else
 630                                 err="${err};$die_msg"
 631                                 continue
 632                         fi
 633                 fi
 634
 635                 if test -n "$recursive"
 636                 then
 637                         (clear_local_git_env; cd "$sm_path" && eval cmd_update "$orig_flags")
 638                         res=$?
 639                         if test $res -gt 0
 640                         then
 641                                 die_msg="$(eval_gettext "Failed to recurse into submodule path '\$sm_path'")"
 642                                 if test $res -eq 1
 643                                 then
 644                                         err="${err};$die_msg"
 645                                         continue
 646                                 else
 647                                         die_with_status $res "$die_msg"
 648                                 fi
 649                         fi
 650                 fi
 651         done
 652
 653         if test -n "$err"
 654         then
 655                 OIFS=$IFS
 656                 IFS=';'
 657                 for e in $err
 658                 do
 659                         if test -n "$e"
 660                         then
 661                                 echo >&2 "$e"
 662                         fi
 663                 done
 664                 IFS=$OIFS
 665                 exit 1
 666         fi
 667         }
 668 }
 669
 670 set_name_rev () {
 671         revname=$( (
 672                 clear_local_git_env
 673                 cd "$1" && {
 674                         git describe "$2" 2>/dev/null ||
 675                         git describe --tags "$2" 2>/dev/null ||
 676                         git describe --contains "$2" 2>/dev/null ||
 677                         git describe --all --always "$2"
 678                 }
 679         ) )
 680         test -z "$revname" || revname=" ($revname)"
 681 }
 682 #
 683 # Show commit summary for submodules in index or working tree
 684 #
 685 # If '--cached' is given, show summary between index and given commit,
 686 # or between working tree and given commit
 687 #
 688 # $@ = [commit (default 'HEAD'),] requested paths (default all)
 689 #
 690 cmd_summary() {
 691         summary_limit=-1
 692         for_status=
 693         diff_cmd=diff-index
 694
 695         # parse $args after "submodule ... summary".
 696         while test $# -ne 0
 697         do
 698                 case "$1" in
 699                 --cached)
 700                         cached="$1"
 701                         ;;
 702                 --files)
 703                         files="$1"
 704                         ;;
 705                 --for-status)
 706                         for_status="$1"
 707                         ;;
 708                 -n|--summary-limit)
 709                         if summary_limit=$(($2 + 0)) 2>/dev/null && test "$summary_limit" = "$2"
 710                         then
 711                                 :
 712                         else
 713                                 usage
 714                         fi
 715                         shift
 716                         ;;
 717                 --)
 718                         shift
 719                         break
 720                         ;;
 721                 -*)
 722                         usage
 723                         ;;
 724                 *)
 725                         break
 726                         ;;
 727                 esac
 728                 shift
 729         done
 730
 731         test $summary_limit = 0 && return
 732
 733         if rev=$(git rev-parse -q --verify --default HEAD ${1+"$1"})
 734         then
 735                 head=$rev
 736                 test $# = 0 || shift
 737         elif test -z "$1" -o "$1" = "HEAD"
 738         then
 739                 # before the first commit: compare with an empty tree
 740                 head=$(git hash-object -w -t tree --stdin </dev/null)
 741                 test -z "$1" || shift
 742         else
 743                 head="HEAD"
 744         fi
 745
 746         if [ -n "$files" ]
 747         then
 748                 test -n "$cached" &&
 749                 die "$(gettext "The --cached option cannot be used with the --files option")"
 750                 diff_cmd=diff-files
 751                 head=
 752         fi
 753
 754         cd_to_toplevel
 755         # Get modified modules cared by user
 756         modules=$(git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- "$@" |
 757                 sane_egrep '^:([0-7]* )?160000' |
 758                 while read mod_src mod_dst sha1_src sha1_dst status name
 759                 do
 760                         # Always show modules deleted or type-changed (blob<->module)
 761                         test $status = D -o $status = T && echo "$name" && continue
 762                         # Also show added or modified modules which are checked out
 763                         GIT_DIR="$name/.git" git-rev-parse --git-dir >/dev/null 2>&1 &&
 764                         echo "$name"
 765                 done
 766         )
 767
 768         test -z "$modules" && return
 769
 770         git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- $modules |
 771         sane_egrep '^:([0-7]* )?160000' |
 772         cut -c2- |
 773         while read mod_src mod_dst sha1_src sha1_dst status name
 774         do
 775                 if test -z "$cached" &&
 776                         test $sha1_dst = 0000000000000000000000000000000000000000
 777                 then
 778                         case "$mod_dst" in
 779                         160000)
 780                                 sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
 781                                 ;;
 782                         100644 | 100755 | 120000)
 783                                 sha1_dst=$(git hash-object $name)
 784                                 ;;
 785                         000000)
 786                                 ;; # removed
 787                         *)
 788                                 # unexpected type
 789                                 eval_gettextln "unexpected mode \$mod_dst" >&2
 790                                 continue ;;
 791                         esac
 792                 fi
 793                 missing_src=
 794                 missing_dst=
 795
 796                 test $mod_src = 160000 &&
 797                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_src^0 >/dev/null &&
 798                 missing_src=t
 799
 800                 test $mod_dst = 160000 &&
 801                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_dst^0 >/dev/null &&
 802                 missing_dst=t
 803
 804                 total_commits=
 805                 case "$missing_src,$missing_dst" in
 806                 t,)
 807                         errmsg="$(eval_gettext "  Warn: \$name doesn't contain commit \$sha1_src")"
 808                         ;;
 809                 ,t)
 810                         errmsg="$(eval_gettext "  Warn: \$name doesn't contain commit \$sha1_dst")"
 811                         ;;
 812                 t,t)
 813                         errmsg="$(eval_gettext "  Warn: \$name doesn't contain commits \$sha1_src and \$sha1_dst")"
 814                         ;;
 815                 *)
 816                         errmsg=
 817                         total_commits=$(
 818                         if test $mod_src = 160000 -a $mod_dst = 160000
 819                         then
 820                                 range="$sha1_src...$sha1_dst"
 821                         elif test $mod_src = 160000
 822                         then
 823                                 range=$sha1_src
 824                         else
 825                                 range=$sha1_dst
 826                         fi
 827                         GIT_DIR="$name/.git" \
 828                         git rev-list --first-parent $range -- | wc -l
 829                         )
 830                         total_commits=" ($(($total_commits + 0)))"
 831                         ;;
 832                 esac
 833
 834                 sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
 835                 sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
 836                 if test $status = T
 837                 then
 838                         blob="$(gettext "blob")"
 839                         submodule="$(gettext "submodule")"
 840                         if test $mod_dst = 160000
 841                         then
 842                                 echo "* $name $sha1_abbr_src($blob)->$sha1_abbr_dst($submodule)$total_commits:"
 843                         else
 844                                 echo "* $name $sha1_abbr_src($submodule)->$sha1_abbr_dst($blob)$total_commits:"
 845                         fi
 846                 else
 847                         echo "* $name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
 848                 fi
 849                 if test -n "$errmsg"
 850                 then
 851                         # Don't give error msg for modification whose dst is not submodule
 852                         # i.e. deleted or changed to blob
 853                         test $mod_dst = 160000 && echo "$errmsg"
 854                 else
 855                         if test $mod_src = 160000 -a $mod_dst = 160000
 856                         then
 857                                 limit=
 858                                 test $summary_limit -gt 0 && limit="-$summary_limit"
 859                                 GIT_DIR="$name/.git" \
 860                                 git log $limit --pretty='format:  %m %s' \
 861                                 --first-parent $sha1_src...$sha1_dst
 862                         elif test $mod_dst = 160000
 863                         then
 864                                 GIT_DIR="$name/.git" \
 865                                 git log --pretty='format:  > %s' -1 $sha1_dst
 866                         else
 867                                 GIT_DIR="$name/.git" \
 868                                 git log --pretty='format:  < %s' -1 $sha1_src
 869                         fi
 870                         echo
 871                 fi
 872                 echo
 873         done |
 874         if test -n "$for_status"; then
 875                 if [ -n "$files" ]; then
 876                         gettextln "# Submodules changed but not updated:"
 877                 else
 878                         gettextln "# Submodule changes to be committed:"
 879                 fi
 880                 echo "#"
 881                 sed -e 's|^|# |' -e 's|^# $|#|'
 882         else
 883                 cat
 884         fi
 885 }
 886 #
 887 # List all submodules, prefixed with:
 888 #  - submodule not initialized
 889 #  + different revision checked out
 890 #
 891 # If --cached was specified the revision in the index will be printed
 892 # instead of the currently checked out revision.
 893 #
 894 # $@ = requested paths (default to all)
 895 #
 896 cmd_status()
 897 {
 898         # parse $args after "submodule ... status".
 899         orig_flags=
 900         while test $# -ne 0
 901         do
 902                 case "$1" in
 903                 -q|--quiet)
 904                         GIT_QUIET=1
 905                         ;;
 906                 --cached)
 907                         cached=1
 908                         ;;
 909                 --recursive)
 910                         recursive=1
 911                         ;;
 912                 --)
 913                         shift
 914                         break
 915                         ;;
 916                 -*)
 917                         usage
 918                         ;;
 919                 *)
 920                         break
 921                         ;;
 922                 esac
 923                 orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 924                 shift
 925         done
 926
 927         module_list "$@" |
 928         while read mode sha1 stage sm_path
 929         do
 930                 name=$(module_name "$sm_path") || exit
 931                 url=$(git config submodule."$name".url)
 932                 displaypath="$prefix$sm_path"
 933                 if test "$stage" = U
 934                 then
 935                         say "U$sha1 $displaypath"
 936                         continue
 937                 fi
 938                 if test -z "$url" || ! test -d "$sm_path"/.git -o -f "$sm_path"/.git
 939                 then
 940                         say "-$sha1 $displaypath"
 941                         continue;
 942                 fi
 943                 set_name_rev "$sm_path" "$sha1"
 944                 if git diff-files --ignore-submodules=dirty --quiet -- "$sm_path"
 945                 then
 946                         say " $sha1 $displaypath$revname"
 947                 else
 948                         if test -z "$cached"
 949                         then
 950                                 sha1=$(clear_local_git_env; cd "$sm_path" && git rev-parse --verify HEAD)
 951                                 set_name_rev "$sm_path" "$sha1"
 952                         fi
 953                         say "+$sha1 $displaypath$revname"
 954                 fi
 955
 956                 if test -n "$recursive"
 957                 then
 958                         (
 959                                 prefix="$displaypath/"
 960                                 clear_local_git_env
 961                                 cd "$sm_path" &&
 962                                 eval cmd_status "$orig_args"
 963                         ) ||
 964                         die "$(eval_gettext "Failed to recurse into submodule path '\$sm_path'")"
 965                 fi
 966         done
 967 }
 968 #
 969 # Sync remote urls for submodules
 970 # This makes the value for remote.$remote.url match the value
 971 # specified in .gitmodules.
 972 #
 973 cmd_sync()
 974 {
 975         while test $# -ne 0
 976         do
 977                 case "$1" in
 978                 -q|--quiet)
 979                         GIT_QUIET=1
 980                         shift
 981                         ;;
 982                 --)
 983                         shift
 984                         break
 985                         ;;
 986                 -*)
 987                         usage
 988                         ;;
 989                 *)
 990                         break
 991                         ;;
 992                 esac
 993         done
 994         cd_to_toplevel
 995         module_list "$@" |
 996         while read mode sha1 stage sm_path
 997         do
 998                 name=$(module_name "$sm_path")
 999                 url=$(git config -f .gitmodules --get submodule."$name".url)
1000
1001                 # Possibly a url relative to parent
1002                 case "$url" in
1003                 ./*|../*)
1004                         # rewrite foo/bar as ../.. to find path from
1005                         # submodule work tree to superproject work tree
1006                         up_path="$(echo "$sm_path" | sed "s/[^/][^/]*/../g")" &&
1007                         # guarantee a trailing /
1008                         up_path=${up_path%/}/ &&
1009                         # path from submodule work tree to submodule origin repo
1010                         sub_origin_url=$(resolve_relative_url "$url" "$up_path") &&
1011                         # path from superproject work tree to submodule origin repo
1012                         super_config_url=$(resolve_relative_url "$url") || exit
1013                         ;;
1014                 *)
1015                         sub_origin_url="$url"
1016                         super_config_url="$url"
1017                         ;;
1018                 esac
1019
1020                 if git config "submodule.$name.url" >/dev/null 2>/dev/null
1021                 then
1022                         say "$(eval_gettext "Synchronizing submodule url for '\$name'")"
1023                         git config submodule."$name".url "$super_config_url"
1024
1025                         if test -e "$sm_path"/.git
1026                         then
1027                         (
1028                                 clear_local_git_env
1029                                 cd "$sm_path"
1030                                 remote=$(get_default_remote)
1031                                 git config remote."$remote".url "$sub_origin_url"
1032                         )
1033                         fi
1034                 fi
1035         done
1036 }
1037
1038 # This loop parses the command line arguments to find the
1039 # subcommand name to dispatch.  Parsing of the subcommand specific
1040 # options are primarily done by the subcommand implementations.
1041 # Subcommand specific options such as --branch and --cached are
1042 # parsed here as well, for backward compatibility.
1043
1044 while test $# != 0 && test -z "$command"
1045 do
1046         case "$1" in
1047         add | foreach | init | update | status | summary | sync)
1048                 command=$1
1049                 ;;
1050         -q|--quiet)
1051                 GIT_QUIET=1
1052                 ;;
1053         -b|--branch)
1054                 case "$2" in
1055                 '')
1056                         usage
1057                         ;;
1058                 esac
1059                 branch="$2"; shift
1060                 ;;
1061         --cached)
1062                 cached="$1"
1063                 ;;
1064         --)
1065                 break
1066                 ;;
1067         -*)
1068                 usage
1069                 ;;
1070         *)
1071                 break
1072                 ;;
1073         esac
1074         shift
1075 done
1076
1077 # No command word defaults to "status"
1078 test -n "$command" || command=status
1079
1080 # "-b branch" is accepted only by "add"
1081 if test -n "$branch" && test "$command" != add
1082 then
1083         usage
1084 fi
1085
1086 # "--cached" is accepted only by "status" and "summary"
1087 if test -n "$cached" && test "$command" != status -a "$command" != summary
1088 then
1089         usage
1090 fi
1091
1092 "cmd_$command" "$@"