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                 (
 185                         clear_local_git_env
 186                         git clone $quiet -n ${reference:+"$reference"} \
 187                                 --separate-git-dir "$gitdir" "$url" "$sm_path"
 188                 ) ||
 189                 die "$(eval_gettext "Clone of '\$url' into submodule path '\$sm_path' failed")"
 190         fi
 191
 192         # We already are at the root of the work tree but cd_to_toplevel will
 193         # resolve any symlinks that might be present in $PWD
 194         a=$(cd_to_toplevel && cd "$gitdir" && pwd)/
 195         b=$(cd_to_toplevel && cd "$sm_path" && pwd)/
 196         # normalize Windows-style absolute paths to POSIX-style absolute paths
 197         case $a in [a-zA-Z]:/*) a=/${a%%:*}${a#*:} ;; esac
 198         case $b in [a-zA-Z]:/*) b=/${b%%:*}${b#*:} ;; esac
 199         # Remove all common leading directories after a sanity check
 200         if test "${a#$b}" != "$a" || test "${b#$a}" != "$b"; then
 201                 die "$(eval_gettext "Gitdir '\$a' is part of the submodule path '\$b' or vice versa")"
 202         fi
 203         while test "${a%%/*}" = "${b%%/*}"
 204         do
 205                 a=${a#*/}
 206                 b=${b#*/}
 207         done
 208         # Now chop off the trailing '/'s that were added in the beginning
 209         a=${a%/}
 210         b=${b%/}
 211
 212         # Turn each leading "*/" component into "../"
 213         rel=$(echo $b | sed -e 's|[^/][^/]*|..|g')
 214         echo "gitdir: $rel/$a" >"$sm_path/.git"
 215
 216         rel=$(echo $a | sed -e 's|[^/][^/]*|..|g')
 217         (clear_local_git_env; cd "$sm_path" && GIT_WORK_TREE=. git config core.worktree "$rel/$b")
 218 }
 219
 220 #
 221 # Add a new submodule to the working tree, .gitmodules and the index
 222 #
 223 # $@ = repo path
 224 #
 225 # optional branch is stored in global branch variable
 226 #
 227 cmd_add()
 228 {
 229         # parse $args after "submodule ... add".
 230         while test $# -ne 0
 231         do
 232                 case "$1" in
 233                 -b | --branch)
 234                         case "$2" in '') usage ;; esac
 235                         branch=$2
 236                         shift
 237                         ;;
 238                 -f | --force)
 239                         force=$1
 240                         ;;
 241                 -q|--quiet)
 242                         GIT_QUIET=1
 243                         ;;
 244                 --reference)
 245                         case "$2" in '') usage ;; esac
 246                         reference="--reference=$2"
 247                         shift
 248                         ;;
 249                 --reference=*)
 250                         reference="$1"
 251                         shift
 252                         ;;
 253                 --)
 254                         shift
 255                         break
 256                         ;;
 257                 -*)
 258                         usage
 259                         ;;
 260                 *)
 261                         break
 262                         ;;
 263                 esac
 264                 shift
 265         done
 266
 267         repo=$1
 268         sm_path=$2
 269
 270         if test -z "$sm_path"; then
 271                 sm_path=$(echo "$repo" |
 272                         sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
 273         fi
 274
 275         if test -z "$repo" -o -z "$sm_path"; then
 276                 usage
 277         fi
 278
 279         # assure repo is absolute or relative to parent
 280         case "$repo" in
 281         ./*|../*)
 282                 # dereference source url relative to parent's url
 283                 realrepo=$(resolve_relative_url "$repo") || exit
 284                 ;;
 285         *:*|/*)
 286                 # absolute url
 287                 realrepo=$repo
 288                 ;;
 289         *)
 290                 die "$(eval_gettext "repo URL: '\$repo' must be absolute or begin with ./|../")"
 291         ;;
 292         esac
 293
 294         # normalize path:
 295         # multiple //; leading ./; /./; /../; trailing /
 296         sm_path=$(printf '%s/\n' "$sm_path" |
 297                 sed -e '
 298                         s|//*|/|g
 299                         s|^\(\./\)*||
 300                         s|/\./|/|g
 301                         :start
 302                         s|\([^/]*\)/\.\./||
 303                         tstart
 304                         s|/*$||
 305                 ')
 306         git ls-files --error-unmatch "$sm_path" > /dev/null 2>&1 &&
 307         die "$(eval_gettext "'\$sm_path' already exists in the index")"
 308
 309         if test -z "$force" && ! git add --dry-run --ignore-missing "$sm_path" > /dev/null 2>&1
 310         then
 311                 eval_gettextln "The following path is ignored by one of your .gitignore files:
 312 \$sm_path
 313 Use -f if you really want to add it." >&2
 314                 exit 1
 315         fi
 316
 317         # perhaps the path exists and is already a git repo, else clone it
 318         if test -e "$sm_path"
 319         then
 320                 if test -d "$sm_path"/.git -o -f "$sm_path"/.git
 321                 then
 322                         eval_gettextln "Adding existing repo at '\$sm_path' to the index"
 323                 else
 324                         die "$(eval_gettext "'\$sm_path' already exists and is not a valid git repo")"
 325                 fi
 326
 327         else
 328
 329                 module_clone "$sm_path" "$realrepo" "$reference" || exit
 330                 (
 331                         clear_local_git_env
 332                         cd "$sm_path" &&
 333                         # ash fails to wordsplit ${branch:+-b "$branch"...}
 334                         case "$branch" in
 335                         '') git checkout -f -q ;;
 336                         ?*) git checkout -f -q -B "$branch" "origin/$branch" ;;
 337                         esac
 338                 ) || die "$(eval_gettext "Unable to checkout submodule '\$sm_path'")"
 339         fi
 340         git config submodule."$sm_path".url "$realrepo"
 341
 342         git add $force "$sm_path" ||
 343         die "$(eval_gettext "Failed to add submodule '\$sm_path'")"
 344
 345         git config -f .gitmodules submodule."$sm_path".path "$sm_path" &&
 346         git config -f .gitmodules submodule."$sm_path".url "$repo" &&
 347         git add --force .gitmodules ||
 348         die "$(eval_gettext "Failed to register submodule '\$sm_path'")"
 349 }
 350
 351 #
 352 # Execute an arbitrary command sequence in each checked out
 353 # submodule
 354 #
 355 # $@ = command to execute
 356 #
 357 cmd_foreach()
 358 {
 359         # parse $args after "submodule ... foreach".
 360         while test $# -ne 0
 361         do
 362                 case "$1" in
 363                 -q|--quiet)
 364                         GIT_QUIET=1
 365                         ;;
 366                 --recursive)
 367                         recursive=1
 368                         ;;
 369                 -*)
 370                         usage
 371                         ;;
 372                 *)
 373                         break
 374                         ;;
 375                 esac
 376                 shift
 377         done
 378
 379         toplevel=$(pwd)
 380
 381         # dup stdin so that it can be restored when running the external
 382         # command in the subshell (and a recursive call to this function)
 383         exec 3<&0
 384
 385         module_list |
 386         while read mode sha1 stage sm_path
 387         do
 388                 if test -e "$sm_path"/.git
 389                 then
 390                         say "$(eval_gettext "Entering '\$prefix\$sm_path'")"
 391                         name=$(module_name "$sm_path")
 392                         (
 393                                 prefix="$prefix$sm_path/"
 394                                 clear_local_git_env
 395                                 # we make $path available to scripts ...
 396                                 path=$sm_path
 397                                 cd "$sm_path" &&
 398                                 eval "$@" &&
 399                                 if test -n "$recursive"
 400                                 then
 401                                         cmd_foreach "--recursive" "$@"
 402                                 fi
 403                         ) <&3 3<&- ||
 404                         die "$(eval_gettext "Stopping at '\$sm_path'; script returned non-zero status.")"
 405                 fi
 406         done
 407 }
 408
 409 #
 410 # Register submodules in .git/config
 411 #
 412 # $@ = requested paths (default to all)
 413 #
 414 cmd_init()
 415 {
 416         # parse $args after "submodule ... init".
 417         while test $# -ne 0
 418         do
 419                 case "$1" in
 420                 -q|--quiet)
 421                         GIT_QUIET=1
 422                         ;;
 423                 --)
 424                         shift
 425                         break
 426                         ;;
 427                 -*)
 428                         usage
 429                         ;;
 430                 *)
 431                         break
 432                         ;;
 433                 esac
 434                 shift
 435         done
 436
 437         module_list "$@" |
 438         while read mode sha1 stage sm_path
 439         do
 440                 name=$(module_name "$sm_path") || exit
 441
 442                 # Copy url setting when it is not set yet
 443                 if test -z "$(git config "submodule.$name.url")"
 444                 then
 445                         url=$(git config -f .gitmodules submodule."$name".url)
 446                         test -z "$url" &&
 447                         die "$(eval_gettext "No url found for submodule path '\$sm_path' in .gitmodules")"
 448
 449                         # Possibly a url relative to parent
 450                         case "$url" in
 451                         ./*|../*)
 452                                 url=$(resolve_relative_url "$url") || exit
 453                                 ;;
 454                         esac
 455                         git config submodule."$name".url "$url" ||
 456                         die "$(eval_gettext "Failed to register url for submodule path '\$sm_path'")"
 457
 458                         say "$(eval_gettext "Submodule '\$name' (\$url) registered for path '\$sm_path'")"
 459                 fi
 460
 461                 # Copy "update" setting when it is not set yet
 462                 upd="$(git config -f .gitmodules submodule."$name".update)"
 463                 test -z "$upd" ||
 464                 test -n "$(git config submodule."$name".update)" ||
 465                 git config submodule."$name".update "$upd" ||
 466                 die "$(eval_gettext "Failed to register update mode for submodule path '\$sm_path'")"
 467         done
 468 }
 469
 470 #
 471 # Update each submodule path to correct revision, using clone and checkout as needed
 472 #
 473 # $@ = requested paths (default to all)
 474 #
 475 cmd_update()
 476 {
 477         # parse $args after "submodule ... update".
 478         orig_flags=
 479         while test $# -ne 0
 480         do
 481                 case "$1" in
 482                 -q|--quiet)
 483                         GIT_QUIET=1
 484                         ;;
 485                 -i|--init)
 486                         init=1
 487                         ;;
 488                 -N|--no-fetch)
 489                         nofetch=1
 490                         ;;
 491                 -f|--force)
 492                         force=$1
 493                         ;;
 494                 -r|--rebase)
 495                         update="rebase"
 496                         ;;
 497                 --reference)
 498                         case "$2" in '') usage ;; esac
 499                         reference="--reference=$2"
 500                         orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 501                         shift
 502                         ;;
 503                 --reference=*)
 504                         reference="$1"
 505                         ;;
 506                 -m|--merge)
 507                         update="merge"
 508                         ;;
 509                 --recursive)
 510                         recursive=1
 511                         ;;
 512                 --checkout)
 513                         update="checkout"
 514                         ;;
 515                 --)
 516                         shift
 517                         break
 518                         ;;
 519                 -*)
 520                         usage
 521                         ;;
 522                 *)
 523                         break
 524                         ;;
 525                 esac
 526                 orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 527                 shift
 528         done
 529
 530         if test -n "$init"
 531         then
 532                 cmd_init "--" "$@" || return
 533         fi
 534
 535         cloned_modules=
 536         module_list "$@" | {
 537         err=
 538         while read mode sha1 stage sm_path
 539         do
 540                 if test "$stage" = U
 541                 then
 542                         echo >&2 "Skipping unmerged submodule $sm_path"
 543                         continue
 544                 fi
 545                 name=$(module_name "$sm_path") || exit
 546                 url=$(git config submodule."$name".url)
 547                 if ! test -z "$update"
 548                 then
 549                         update_module=$update
 550                 else
 551                         update_module=$(git config submodule."$name".update)
 552                 fi
 553
 554                 if test "$update_module" = "none"
 555                 then
 556                         echo "Skipping submodule '$sm_path'"
 557                         continue
 558                 fi
 559
 560                 if test -z "$url"
 561                 then
 562                         # Only mention uninitialized submodules when its
 563                         # path have been specified
 564                         test "$#" != "0" &&
 565                         say "$(eval_gettext "Submodule path '\$sm_path' not initialized
 566 Maybe you want to use 'update --init'?")"
 567                         continue
 568                 fi
 569
 570                 if ! test -d "$sm_path"/.git -o -f "$sm_path"/.git
 571                 then
 572                         module_clone "$sm_path" "$url" "$reference"|| exit
 573                         cloned_modules="$cloned_modules;$name"
 574                         subsha1=
 575                 else
 576                         subsha1=$(clear_local_git_env; cd "$sm_path" &&
 577                                 git rev-parse --verify HEAD) ||
 578                         die "$(eval_gettext "Unable to find current revision in submodule path '\$sm_path'")"
 579                 fi
 580
 581                 if test "$subsha1" != "$sha1"
 582                 then
 583                         subforce=$force
 584                         # If we don't already have a -f flag and the submodule has never been checked out
 585                         if test -z "$subsha1" -a -z "$force"
 586                         then
 587                                 subforce="-f"
 588                         fi
 589
 590                         if test -z "$nofetch"
 591                         then
 592                                 # Run fetch only if $sha1 isn't present or it
 593                                 # is not reachable from a ref.
 594                                 (clear_local_git_env; cd "$sm_path" &&
 595                                         ( (rev=$(git rev-list -n 1 $sha1 --not --all 2>/dev/null) &&
 596                                          test -z "$rev") || git-fetch)) ||
 597                                 die "$(eval_gettext "Unable to fetch in submodule path '\$sm_path'")"
 598                         fi
 599
 600                         # Is this something we just cloned?
 601                         case ";$cloned_modules;" in
 602                         *";$name;"*)
 603                                 # then there is no local change to integrate
 604                                 update_module= ;;
 605                         esac
 606
 607                         must_die_on_failure=
 608                         case "$update_module" in
 609                         rebase)
 610                                 command="git rebase"
 611                                 die_msg="$(eval_gettext "Unable to rebase '\$sha1' in submodule path '\$sm_path'")"
 612                                 say_msg="$(eval_gettext "Submodule path '\$sm_path': rebased into '\$sha1'")"
 613                                 must_die_on_failure=yes
 614                                 ;;
 615                         merge)
 616                                 command="git merge"
 617                                 die_msg="$(eval_gettext "Unable to merge '\$sha1' in submodule path '\$sm_path'")"
 618                                 say_msg="$(eval_gettext "Submodule path '\$sm_path': merged in '\$sha1'")"
 619                                 must_die_on_failure=yes
 620                                 ;;
 621                         *)
 622                                 command="git checkout $subforce -q"
 623                                 die_msg="$(eval_gettext "Unable to checkout '\$sha1' in submodule path '\$sm_path'")"
 624                                 say_msg="$(eval_gettext "Submodule path '\$sm_path': checked out '\$sha1'")"
 625                                 ;;
 626                         esac
 627
 628                         if (clear_local_git_env; cd "$sm_path" && $command "$sha1")
 629                         then
 630                                 say "$say_msg"
 631                         elif test -n "$must_die_on_failure"
 632                         then
 633                                 die_with_status 2 "$die_msg"
 634                         else
 635                                 err="${err};$die_msg"
 636                                 continue
 637                         fi
 638                 fi
 639
 640                 if test -n "$recursive"
 641                 then
 642                         (clear_local_git_env; cd "$sm_path" && eval cmd_update "$orig_flags")
 643                         res=$?
 644                         if test $res -gt 0
 645                         then
 646                                 die_msg="$(eval_gettext "Failed to recurse into submodule path '\$sm_path'")"
 647                                 if test $res -eq 1
 648                                 then
 649                                         err="${err};$die_msg"
 650                                         continue
 651                                 else
 652                                         die_with_status $res "$die_msg"
 653                                 fi
 654                         fi
 655                 fi
 656         done
 657
 658         if test -n "$err"
 659         then
 660                 OIFS=$IFS
 661                 IFS=';'
 662                 for e in $err
 663                 do
 664                         if test -n "$e"
 665                         then
 666                                 echo >&2 "$e"
 667                         fi
 668                 done
 669                 IFS=$OIFS
 670                 exit 1
 671         fi
 672         }
 673 }
 674
 675 set_name_rev () {
 676         revname=$( (
 677                 clear_local_git_env
 678                 cd "$1" && {
 679                         git describe "$2" 2>/dev/null ||
 680                         git describe --tags "$2" 2>/dev/null ||
 681                         git describe --contains "$2" 2>/dev/null ||
 682                         git describe --all --always "$2"
 683                 }
 684         ) )
 685         test -z "$revname" || revname=" ($revname)"
 686 }
 687 #
 688 # Show commit summary for submodules in index or working tree
 689 #
 690 # If '--cached' is given, show summary between index and given commit,
 691 # or between working tree and given commit
 692 #
 693 # $@ = [commit (default 'HEAD'),] requested paths (default all)
 694 #
 695 cmd_summary() {
 696         summary_limit=-1
 697         for_status=
 698         diff_cmd=diff-index
 699
 700         # parse $args after "submodule ... summary".
 701         while test $# -ne 0
 702         do
 703                 case "$1" in
 704                 --cached)
 705                         cached="$1"
 706                         ;;
 707                 --files)
 708                         files="$1"
 709                         ;;
 710                 --for-status)
 711                         for_status="$1"
 712                         ;;
 713                 -n|--summary-limit)
 714                         if summary_limit=$(($2 + 0)) 2>/dev/null && test "$summary_limit" = "$2"
 715                         then
 716                                 :
 717                         else
 718                                 usage
 719                         fi
 720                         shift
 721                         ;;
 722                 --)
 723                         shift
 724                         break
 725                         ;;
 726                 -*)
 727                         usage
 728                         ;;
 729                 *)
 730                         break
 731                         ;;
 732                 esac
 733                 shift
 734         done
 735
 736         test $summary_limit = 0 && return
 737
 738         if rev=$(git rev-parse -q --verify --default HEAD ${1+"$1"})
 739         then
 740                 head=$rev
 741                 test $# = 0 || shift
 742         elif test -z "$1" -o "$1" = "HEAD"
 743         then
 744                 # before the first commit: compare with an empty tree
 745                 head=$(git hash-object -w -t tree --stdin </dev/null)
 746                 test -z "$1" || shift
 747         else
 748                 head="HEAD"
 749         fi
 750
 751         if [ -n "$files" ]
 752         then
 753                 test -n "$cached" &&
 754                 die "$(gettext "The --cached option cannot be used with the --files option")"
 755                 diff_cmd=diff-files
 756                 head=
 757         fi
 758
 759         cd_to_toplevel
 760         # Get modified modules cared by user
 761         modules=$(git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- "$@" |
 762                 sane_egrep '^:([0-7]* )?160000' |
 763                 while read mod_src mod_dst sha1_src sha1_dst status name
 764                 do
 765                         # Always show modules deleted or type-changed (blob<->module)
 766                         test $status = D -o $status = T && echo "$name" && continue
 767                         # Also show added or modified modules which are checked out
 768                         GIT_DIR="$name/.git" git-rev-parse --git-dir >/dev/null 2>&1 &&
 769                         echo "$name"
 770                 done
 771         )
 772
 773         test -z "$modules" && return
 774
 775         git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- $modules |
 776         sane_egrep '^:([0-7]* )?160000' |
 777         cut -c2- |
 778         while read mod_src mod_dst sha1_src sha1_dst status name
 779         do
 780                 if test -z "$cached" &&
 781                         test $sha1_dst = 0000000000000000000000000000000000000000
 782                 then
 783                         case "$mod_dst" in
 784                         160000)
 785                                 sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
 786                                 ;;
 787                         100644 | 100755 | 120000)
 788                                 sha1_dst=$(git hash-object $name)
 789                                 ;;
 790                         000000)
 791                                 ;; # removed
 792                         *)
 793                                 # unexpected type
 794                                 eval_gettextln "unexpected mode \$mod_dst" >&2
 795                                 continue ;;
 796                         esac
 797                 fi
 798                 missing_src=
 799                 missing_dst=
 800
 801                 test $mod_src = 160000 &&
 802                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_src^0 >/dev/null &&
 803                 missing_src=t
 804
 805                 test $mod_dst = 160000 &&
 806                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_dst^0 >/dev/null &&
 807                 missing_dst=t
 808
 809                 total_commits=
 810                 case "$missing_src,$missing_dst" in
 811                 t,)
 812                         errmsg="$(eval_gettext "  Warn: \$name doesn't contain commit \$sha1_src")"
 813                         ;;
 814                 ,t)
 815                         errmsg="$(eval_gettext "  Warn: \$name doesn't contain commit \$sha1_dst")"
 816                         ;;
 817                 t,t)
 818                         errmsg="$(eval_gettext "  Warn: \$name doesn't contain commits \$sha1_src and \$sha1_dst")"
 819                         ;;
 820                 *)
 821                         errmsg=
 822                         total_commits=$(
 823                         if test $mod_src = 160000 -a $mod_dst = 160000
 824                         then
 825                                 range="$sha1_src...$sha1_dst"
 826                         elif test $mod_src = 160000
 827                         then
 828                                 range=$sha1_src
 829                         else
 830                                 range=$sha1_dst
 831                         fi
 832                         GIT_DIR="$name/.git" \
 833                         git rev-list --first-parent $range -- | wc -l
 834                         )
 835                         total_commits=" ($(($total_commits + 0)))"
 836                         ;;
 837                 esac
 838
 839                 sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
 840                 sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
 841                 if test $status = T
 842                 then
 843                         blob="$(gettext "blob")"
 844                         submodule="$(gettext "submodule")"
 845                         if test $mod_dst = 160000
 846                         then
 847                                 echo "* $name $sha1_abbr_src($blob)->$sha1_abbr_dst($submodule)$total_commits:"
 848                         else
 849                                 echo "* $name $sha1_abbr_src($submodule)->$sha1_abbr_dst($blob)$total_commits:"
 850                         fi
 851                 else
 852                         echo "* $name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
 853                 fi
 854                 if test -n "$errmsg"
 855                 then
 856                         # Don't give error msg for modification whose dst is not submodule
 857                         # i.e. deleted or changed to blob
 858                         test $mod_dst = 160000 && echo "$errmsg"
 859                 else
 860                         if test $mod_src = 160000 -a $mod_dst = 160000
 861                         then
 862                                 limit=
 863                                 test $summary_limit -gt 0 && limit="-$summary_limit"
 864                                 GIT_DIR="$name/.git" \
 865                                 git log $limit --pretty='format:  %m %s' \
 866                                 --first-parent $sha1_src...$sha1_dst
 867                         elif test $mod_dst = 160000
 868                         then
 869                                 GIT_DIR="$name/.git" \
 870                                 git log --pretty='format:  > %s' -1 $sha1_dst
 871                         else
 872                                 GIT_DIR="$name/.git" \
 873                                 git log --pretty='format:  < %s' -1 $sha1_src
 874                         fi
 875                         echo
 876                 fi
 877                 echo
 878         done |
 879         if test -n "$for_status"; then
 880                 if [ -n "$files" ]; then
 881                         gettextln "# Submodules changed but not updated:"
 882                 else
 883                         gettextln "# Submodule changes to be committed:"
 884                 fi
 885                 echo "#"
 886                 sed -e 's|^|# |' -e 's|^# $|#|'
 887         else
 888                 cat
 889         fi
 890 }
 891 #
 892 # List all submodules, prefixed with:
 893 #  - submodule not initialized
 894 #  + different revision checked out
 895 #
 896 # If --cached was specified the revision in the index will be printed
 897 # instead of the currently checked out revision.
 898 #
 899 # $@ = requested paths (default to all)
 900 #
 901 cmd_status()
 902 {
 903         # parse $args after "submodule ... status".
 904         orig_flags=
 905         while test $# -ne 0
 906         do
 907                 case "$1" in
 908                 -q|--quiet)
 909                         GIT_QUIET=1
 910                         ;;
 911                 --cached)
 912                         cached=1
 913                         ;;
 914                 --recursive)
 915                         recursive=1
 916                         ;;
 917                 --)
 918                         shift
 919                         break
 920                         ;;
 921                 -*)
 922                         usage
 923                         ;;
 924                 *)
 925                         break
 926                         ;;
 927                 esac
 928                 orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 929                 shift
 930         done
 931
 932         module_list "$@" |
 933         while read mode sha1 stage sm_path
 934         do
 935                 name=$(module_name "$sm_path") || exit
 936                 url=$(git config submodule."$name".url)
 937                 displaypath="$prefix$sm_path"
 938                 if test "$stage" = U
 939                 then
 940                         say "U$sha1 $displaypath"
 941                         continue
 942                 fi
 943                 if test -z "$url" || ! test -d "$sm_path"/.git -o -f "$sm_path"/.git
 944                 then
 945                         say "-$sha1 $displaypath"
 946                         continue;
 947                 fi
 948                 set_name_rev "$sm_path" "$sha1"
 949                 if git diff-files --ignore-submodules=dirty --quiet -- "$sm_path"
 950                 then
 951                         say " $sha1 $displaypath$revname"
 952                 else
 953                         if test -z "$cached"
 954                         then
 955                                 sha1=$(clear_local_git_env; cd "$sm_path" && git rev-parse --verify HEAD)
 956                                 set_name_rev "$sm_path" "$sha1"
 957                         fi
 958                         say "+$sha1 $displaypath$revname"
 959                 fi
 960
 961                 if test -n "$recursive"
 962                 then
 963                         (
 964                                 prefix="$displaypath/"
 965                                 clear_local_git_env
 966                                 cd "$sm_path" &&
 967                                 eval cmd_status "$orig_args"
 968                         ) ||
 969                         die "$(eval_gettext "Failed to recurse into submodule path '\$sm_path'")"
 970                 fi
 971         done
 972 }
 973 #
 974 # Sync remote urls for submodules
 975 # This makes the value for remote.$remote.url match the value
 976 # specified in .gitmodules.
 977 #
 978 cmd_sync()
 979 {
 980         while test $# -ne 0
 981         do
 982                 case "$1" in
 983                 -q|--quiet)
 984                         GIT_QUIET=1
 985                         shift
 986                         ;;
 987                 --)
 988                         shift
 989                         break
 990                         ;;
 991                 -*)
 992                         usage
 993                         ;;
 994                 *)
 995                         break
 996                         ;;
 997                 esac
 998         done
 999         cd_to_toplevel
1000         module_list "$@" |
1001         while read mode sha1 stage sm_path
1002         do
1003                 name=$(module_name "$sm_path")
1004                 url=$(git config -f .gitmodules --get submodule."$name".url)
1005
1006                 # Possibly a url relative to parent
1007                 case "$url" in
1008                 ./*|../*)
1009                         # rewrite foo/bar as ../.. to find path from
1010                         # submodule work tree to superproject work tree
1011                         up_path="$(echo "$sm_path" | sed "s/[^/][^/]*/../g")" &&
1012                         # guarantee a trailing /
1013                         up_path=${up_path%/}/ &&
1014                         # path from submodule work tree to submodule origin repo
1015                         sub_origin_url=$(resolve_relative_url "$url" "$up_path") &&
1016                         # path from superproject work tree to submodule origin repo
1017                         super_config_url=$(resolve_relative_url "$url") || exit
1018                         ;;
1019                 *)
1020                         sub_origin_url="$url"
1021                         super_config_url="$url"
1022                         ;;
1023                 esac
1024
1025                 if git config "submodule.$name.url" >/dev/null 2>/dev/null
1026                 then
1027                         say "$(eval_gettext "Synchronizing submodule url for '\$name'")"
1028                         git config submodule."$name".url "$super_config_url"
1029
1030                         if test -e "$sm_path"/.git
1031                         then
1032                         (
1033                                 clear_local_git_env
1034                                 cd "$sm_path"
1035                                 remote=$(get_default_remote)
1036                                 git config remote."$remote".url "$sub_origin_url"
1037                         )
1038                         fi
1039                 fi
1040         done
1041 }
1042
1043 # This loop parses the command line arguments to find the
1044 # subcommand name to dispatch.  Parsing of the subcommand specific
1045 # options are primarily done by the subcommand implementations.
1046 # Subcommand specific options such as --branch and --cached are
1047 # parsed here as well, for backward compatibility.
1048
1049 while test $# != 0 && test -z "$command"
1050 do
1051         case "$1" in
1052         add | foreach | init | update | status | summary | sync)
1053                 command=$1
1054                 ;;
1055         -q|--quiet)
1056                 GIT_QUIET=1
1057                 ;;
1058         -b|--branch)
1059                 case "$2" in
1060                 '')
1061                         usage
1062                         ;;
1063                 esac
1064                 branch="$2"; shift
1065                 ;;
1066         --cached)
1067                 cached="$1"
1068                 ;;
1069         --)
1070                 break
1071                 ;;
1072         -*)
1073                 usage
1074                 ;;
1075         *)
1076                 break
1077                 ;;
1078         esac
1079         shift
1080 done
1081
1082 # No command word defaults to "status"
1083 test -n "$command" || command=status
1084
1085 # "-b branch" is accepted only by "add"
1086 if test -n "$branch" && test "$command" != add
1087 then
1088         usage
1089 fi
1090
1091 # "--cached" is accepted only by "status" and "summary"
1092 if test -n "$cached" && test "$command" != status -a "$command" != summary
1093 then
1094         usage
1095 fi
1096
1097 "cmd_$command" "$@"