git-submodule.sh

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