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