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