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 "$1" in
 258                 -q|--quiet)
 259                         GIT_QUIET=1
 260                         ;;
 261                 --recursive)
 262                         recursive=1
 263                         ;;
 264                 -*)
 265                         usage
 266                         ;;
 267                 *)
 268                         break
 269                         ;;
 270                 esac
 271                 shift
 272         done
 273
 274         toplevel=$(pwd)
 275
 276         module_list |
 277         while read mode sha1 stage path
 278         do
 279                 if test -e "$path"/.git
 280                 then
 281                         say "Entering '$prefix$path'"
 282                         name=$(module_name "$path")
 283                         (
 284                                 prefix="$prefix$path/"
 285                                 clear_local_git_env
 286                                 cd "$path" &&
 287                                 eval "$@" &&
 288                                 if test -n "$recursive"
 289                                 then
 290                                         cmd_foreach "--recursive" "$@"
 291                                 fi
 292                         ) ||
 293                         die "Stopping at '$path'; script returned non-zero status."
 294                 fi
 295         done
 296 }
 297
 298 #
 299 # Register submodules in .git/config
 300 #
 301 # $@ = requested paths (default to all)
 302 #
 303 cmd_init()
 304 {
 305         # parse $args after "submodule ... init".
 306         while test $# -ne 0
 307         do
 308                 case "$1" in
 309                 -q|--quiet)
 310                         GIT_QUIET=1
 311                         ;;
 312                 --)
 313                         shift
 314                         break
 315                         ;;
 316                 -*)
 317                         usage
 318                         ;;
 319                 *)
 320                         break
 321                         ;;
 322                 esac
 323                 shift
 324         done
 325
 326         module_list "$@" |
 327         while read mode sha1 stage path
 328         do
 329                 # Skip already registered paths
 330                 name=$(module_name "$path") || exit
 331                 url=$(git config submodule."$name".url)
 332                 test -z "$url" || continue
 333
 334                 url=$(git config -f .gitmodules submodule."$name".url)
 335                 test -z "$url" &&
 336                 die "No url found for submodule path '$path' in .gitmodules"
 337
 338                 # Possibly a url relative to parent
 339                 case "$url" in
 340                 ./*|../*)
 341                         url=$(resolve_relative_url "$url") || exit
 342                         ;;
 343                 esac
 344
 345                 git config submodule."$name".url "$url" ||
 346                 die "Failed to register url for submodule path '$path'"
 347
 348                 upd="$(git config -f .gitmodules submodule."$name".update)"
 349                 test -z "$upd" ||
 350                 git config submodule."$name".update "$upd" ||
 351                 die "Failed to register update mode for submodule path '$path'"
 352
 353                 say "Submodule '$name' ($url) registered for path '$path'"
 354         done
 355 }
 356
 357 #
 358 # Update each submodule path to correct revision, using clone and checkout as needed
 359 #
 360 # $@ = requested paths (default to all)
 361 #
 362 cmd_update()
 363 {
 364         # parse $args after "submodule ... update".
 365         orig_args="$@"
 366         while test $# -ne 0
 367         do
 368                 case "$1" in
 369                 -q|--quiet)
 370                         shift
 371                         GIT_QUIET=1
 372                         ;;
 373                 -i|--init)
 374                         init=1
 375                         shift
 376                         ;;
 377                 -N|--no-fetch)
 378                         shift
 379                         nofetch=1
 380                         ;;
 381                 -r|--rebase)
 382                         shift
 383                         update="rebase"
 384                         ;;
 385                 --reference)
 386                         case "$2" in '') usage ;; esac
 387                         reference="--reference=$2"
 388                         shift 2
 389                         ;;
 390                 --reference=*)
 391                         reference="$1"
 392                         shift
 393                         ;;
 394                 -m|--merge)
 395                         shift
 396                         update="merge"
 397                         ;;
 398                 --recursive)
 399                         shift
 400                         recursive=1
 401                         ;;
 402                 --)
 403                         shift
 404                         break
 405                         ;;
 406                 -*)
 407                         usage
 408                         ;;
 409                 *)
 410                         break
 411                         ;;
 412                 esac
 413         done
 414
 415         if test -n "$init"
 416         then
 417                 cmd_init "--" "$@" || return
 418         fi
 419
 420         module_list "$@" |
 421         while read mode sha1 stage path
 422         do
 423                 name=$(module_name "$path") || exit
 424                 url=$(git config submodule."$name".url)
 425                 update_module=$(git config submodule."$name".update)
 426                 if test -z "$url"
 427                 then
 428                         # Only mention uninitialized submodules when its
 429                         # path have been specified
 430                         test "$#" != "0" &&
 431                         say "Submodule path '$path' not initialized" &&
 432                         say "Maybe you want to use 'update --init'?"
 433                         continue
 434                 fi
 435
 436                 if ! test -d "$path"/.git -o -f "$path"/.git
 437                 then
 438                         module_clone "$path" "$url" "$reference"|| exit
 439                         subsha1=
 440                 else
 441                         subsha1=$(clear_local_git_env; cd "$path" &&
 442                                 git rev-parse --verify HEAD) ||
 443                         die "Unable to find current revision in submodule path '$path'"
 444                 fi
 445
 446                 if ! test -z "$update"
 447                 then
 448                         update_module=$update
 449                 fi
 450
 451                 if test "$subsha1" != "$sha1"
 452                 then
 453                         force=
 454                         if test -z "$subsha1"
 455                         then
 456                                 force="-f"
 457                         fi
 458
 459                         if test -z "$nofetch"
 460                         then
 461                                 (clear_local_git_env; cd "$path" &&
 462                                         git-fetch) ||
 463                                 die "Unable to fetch in submodule path '$path'"
 464                         fi
 465
 466                         case "$update_module" in
 467                         rebase)
 468                                 command="git rebase"
 469                                 action="rebase"
 470                                 msg="rebased onto"
 471                                 ;;
 472                         merge)
 473                                 command="git merge"
 474                                 action="merge"
 475                                 msg="merged in"
 476                                 ;;
 477                         *)
 478                                 command="git checkout $force -q"
 479                                 action="checkout"
 480                                 msg="checked out"
 481                                 ;;
 482                         esac
 483
 484                         (clear_local_git_env; cd "$path" && $command "$sha1") ||
 485                         die "Unable to $action '$sha1' in submodule path '$path'"
 486                         say "Submodule path '$path': $msg '$sha1'"
 487                 fi
 488
 489                 if test -n "$recursive"
 490                 then
 491                         (clear_local_git_env; cd "$path" && cmd_update $orig_args) ||
 492                         die "Failed to recurse into submodule path '$path'"
 493                 fi
 494         done
 495 }
 496
 497 set_name_rev () {
 498         revname=$( (
 499                 clear_local_git_env
 500                 cd "$1" && {
 501                         git describe "$2" 2>/dev/null ||
 502                         git describe --tags "$2" 2>/dev/null ||
 503                         git describe --contains "$2" 2>/dev/null ||
 504                         git describe --all --always "$2"
 505                 }
 506         ) )
 507         test -z "$revname" || revname=" ($revname)"
 508 }
 509 #
 510 # Show commit summary for submodules in index or working tree
 511 #
 512 # If '--cached' is given, show summary between index and given commit,
 513 # or between working tree and given commit
 514 #
 515 # $@ = [commit (default 'HEAD'),] requested paths (default all)
 516 #
 517 cmd_summary() {
 518         summary_limit=-1
 519         for_status=
 520         diff_cmd=diff-index
 521
 522         # parse $args after "submodule ... summary".
 523         while test $# -ne 0
 524         do
 525                 case "$1" in
 526                 --cached)
 527                         cached="$1"
 528                         ;;
 529                 --files)
 530                         files="$1"
 531                         ;;
 532                 --for-status)
 533                         for_status="$1"
 534                         ;;
 535                 -n|--summary-limit)
 536                         if summary_limit=$(($2 + 0)) 2>/dev/null && test "$summary_limit" = "$2"
 537                         then
 538                                 :
 539                         else
 540                                 usage
 541                         fi
 542                         shift
 543                         ;;
 544                 --)
 545                         shift
 546                         break
 547                         ;;
 548                 -*)
 549                         usage
 550                         ;;
 551                 *)
 552                         break
 553                         ;;
 554                 esac
 555                 shift
 556         done
 557
 558         test $summary_limit = 0 && return
 559
 560         if rev=$(git rev-parse -q --verify --default HEAD ${1+"$1"})
 561         then
 562                 head=$rev
 563                 test $# = 0 || shift
 564         elif test -z "$1" -o "$1" = "HEAD"
 565         then
 566                 # before the first commit: compare with an empty tree
 567                 head=$(git hash-object -w -t tree --stdin </dev/null)
 568                 test -z "$1" || shift
 569         else
 570                 head="HEAD"
 571         fi
 572
 573         if [ -n "$files" ]
 574         then
 575                 test -n "$cached" &&
 576                 die "--cached cannot be used with --files"
 577                 diff_cmd=diff-files
 578                 head=
 579         fi
 580
 581         cd_to_toplevel
 582         # Get modified modules cared by user
 583         modules=$(git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- "$@" |
 584                 sane_egrep '^:([0-7]* )?160000' |
 585                 while read mod_src mod_dst sha1_src sha1_dst status name
 586                 do
 587                         # Always show modules deleted or type-changed (blob<->module)
 588                         test $status = D -o $status = T && echo "$name" && continue
 589                         # Also show added or modified modules which are checked out
 590                         GIT_DIR="$name/.git" git-rev-parse --git-dir >/dev/null 2>&1 &&
 591                         echo "$name"
 592                 done
 593         )
 594
 595         test -z "$modules" && return
 596
 597         git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- $modules |
 598         sane_egrep '^:([0-7]* )?160000' |
 599         cut -c2- |
 600         while read mod_src mod_dst sha1_src sha1_dst status name
 601         do
 602                 if test -z "$cached" &&
 603                         test $sha1_dst = 0000000000000000000000000000000000000000
 604                 then
 605                         case "$mod_dst" in
 606                         160000)
 607                                 sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
 608                                 ;;
 609                         100644 | 100755 | 120000)
 610                                 sha1_dst=$(git hash-object $name)
 611                                 ;;
 612                         000000)
 613                                 ;; # removed
 614                         *)
 615                                 # unexpected type
 616                                 echo >&2 "unexpected mode $mod_dst"
 617                                 continue ;;
 618                         esac
 619                 fi
 620                 missing_src=
 621                 missing_dst=
 622
 623                 test $mod_src = 160000 &&
 624                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_src^0 >/dev/null &&
 625                 missing_src=t
 626
 627                 test $mod_dst = 160000 &&
 628                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_dst^0 >/dev/null &&
 629                 missing_dst=t
 630
 631                 total_commits=
 632                 case "$missing_src,$missing_dst" in
 633                 t,)
 634                         errmsg="  Warn: $name doesn't contain commit $sha1_src"
 635                         ;;
 636                 ,t)
 637                         errmsg="  Warn: $name doesn't contain commit $sha1_dst"
 638                         ;;
 639                 t,t)
 640                         errmsg="  Warn: $name doesn't contain commits $sha1_src and $sha1_dst"
 641                         ;;
 642                 *)
 643                         errmsg=
 644                         total_commits=$(
 645                         if test $mod_src = 160000 -a $mod_dst = 160000
 646                         then
 647                                 range="$sha1_src...$sha1_dst"
 648                         elif test $mod_src = 160000
 649                         then
 650                                 range=$sha1_src
 651                         else
 652                                 range=$sha1_dst
 653                         fi
 654                         GIT_DIR="$name/.git" \
 655                         git rev-list --first-parent $range -- | wc -l
 656                         )
 657                         total_commits=" ($(($total_commits + 0)))"
 658                         ;;
 659                 esac
 660
 661                 sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
 662                 sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
 663                 if test $status = T
 664                 then
 665                         if test $mod_dst = 160000
 666                         then
 667                                 echo "* $name $sha1_abbr_src(blob)->$sha1_abbr_dst(submodule)$total_commits:"
 668                         else
 669                                 echo "* $name $sha1_abbr_src(submodule)->$sha1_abbr_dst(blob)$total_commits:"
 670                         fi
 671                 else
 672                         echo "* $name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
 673                 fi
 674                 if test -n "$errmsg"
 675                 then
 676                         # Don't give error msg for modification whose dst is not submodule
 677                         # i.e. deleted or changed to blob
 678                         test $mod_dst = 160000 && echo "$errmsg"
 679                 else
 680                         if test $mod_src = 160000 -a $mod_dst = 160000
 681                         then
 682                                 limit=
 683                                 test $summary_limit -gt 0 && limit="-$summary_limit"
 684                                 GIT_DIR="$name/.git" \
 685                                 git log $limit --pretty='format:  %m %s' \
 686                                 --first-parent $sha1_src...$sha1_dst
 687                         elif test $mod_dst = 160000
 688                         then
 689                                 GIT_DIR="$name/.git" \
 690                                 git log --pretty='format:  > %s' -1 $sha1_dst
 691                         else
 692                                 GIT_DIR="$name/.git" \
 693                                 git log --pretty='format:  < %s' -1 $sha1_src
 694                         fi
 695                         echo
 696                 fi
 697                 echo
 698         done |
 699         if test -n "$for_status"; then
 700                 if [ -n "$files" ]; then
 701                         echo "# Submodules changed but not updated:"
 702                 else
 703                         echo "# Submodule changes to be committed:"
 704                 fi
 705                 echo "#"
 706                 sed -e 's|^|# |' -e 's|^# $|#|'
 707         else
 708                 cat
 709         fi
 710 }
 711 #
 712 # List all submodules, prefixed with:
 713 #  - submodule not initialized
 714 #  + different revision checked out
 715 #
 716 # If --cached was specified the revision in the index will be printed
 717 # instead of the currently checked out revision.
 718 #
 719 # $@ = requested paths (default to all)
 720 #
 721 cmd_status()
 722 {
 723         # parse $args after "submodule ... status".
 724         orig_args="$@"
 725         while test $# -ne 0
 726         do
 727                 case "$1" in
 728                 -q|--quiet)
 729                         GIT_QUIET=1
 730                         ;;
 731                 --cached)
 732                         cached=1
 733                         ;;
 734                 --recursive)
 735                         recursive=1
 736                         ;;
 737                 --)
 738                         shift
 739                         break
 740                         ;;
 741                 -*)
 742                         usage
 743                         ;;
 744                 *)
 745                         break
 746                         ;;
 747                 esac
 748                 shift
 749         done
 750
 751         module_list "$@" |
 752         while read mode sha1 stage path
 753         do
 754                 name=$(module_name "$path") || exit
 755                 url=$(git config submodule."$name".url)
 756                 displaypath="$prefix$path"
 757                 if test -z "$url" || ! test -d "$path"/.git -o -f "$path"/.git
 758                 then
 759                         say "-$sha1 $displaypath"
 760                         continue;
 761                 fi
 762                 set_name_rev "$path" "$sha1"
 763                 if git diff-files --ignore-submodules=dirty --quiet -- "$path"
 764                 then
 765                         say " $sha1 $displaypath$revname"
 766                 else
 767                         if test -z "$cached"
 768                         then
 769                                 sha1=$(clear_local_git_env; cd "$path" && git rev-parse --verify HEAD)
 770                                 set_name_rev "$path" "$sha1"
 771                         fi
 772                         say "+$sha1 $displaypath$revname"
 773                 fi
 774
 775                 if test -n "$recursive"
 776                 then
 777                         (
 778                                 prefix="$displaypath/"
 779                                 clear_local_git_env
 780                                 cd "$path" &&
 781                                 cmd_status $orig_args
 782                         ) ||
 783                         die "Failed to recurse into submodule path '$path'"
 784                 fi
 785         done
 786 }
 787 #
 788 # Sync remote urls for submodules
 789 # This makes the value for remote.$remote.url match the value
 790 # specified in .gitmodules.
 791 #
 792 cmd_sync()
 793 {
 794         while test $# -ne 0
 795         do
 796                 case "$1" in
 797                 -q|--quiet)
 798                         GIT_QUIET=1
 799                         shift
 800                         ;;
 801                 --)
 802                         shift
 803                         break
 804                         ;;
 805                 -*)
 806                         usage
 807                         ;;
 808                 *)
 809                         break
 810                         ;;
 811                 esac
 812         done
 813         cd_to_toplevel
 814         module_list "$@" |
 815         while read mode sha1 stage path
 816         do
 817                 name=$(module_name "$path")
 818                 url=$(git config -f .gitmodules --get submodule."$name".url)
 819
 820                 # Possibly a url relative to parent
 821                 case "$url" in
 822                 ./*|../*)
 823                         url=$(resolve_relative_url "$url") || exit
 824                         ;;
 825                 esac
 826
 827                 if test -e "$path"/.git
 828                 then
 829                 (
 830                         clear_local_git_env
 831                         cd "$path"
 832                         remote=$(get_default_remote)
 833                         say "Synchronizing submodule url for '$name'"
 834                         git config remote."$remote".url "$url"
 835                 )
 836                 fi
 837         done
 838 }
 839
 840 # This loop parses the command line arguments to find the
 841 # subcommand name to dispatch.  Parsing of the subcommand specific
 842 # options are primarily done by the subcommand implementations.
 843 # Subcommand specific options such as --branch and --cached are
 844 # parsed here as well, for backward compatibility.
 845
 846 while test $# != 0 && test -z "$command"
 847 do
 848         case "$1" in
 849         add | foreach | init | update | status | summary | sync)
 850                 command=$1
 851                 ;;
 852         -q|--quiet)
 853                 GIT_QUIET=1
 854                 ;;
 855         -b|--branch)
 856                 case "$2" in
 857                 '')
 858                         usage
 859                         ;;
 860                 esac
 861                 branch="$2"; shift
 862                 ;;
 863         --cached)
 864                 cached="$1"
 865                 ;;
 866         --)
 867                 break
 868                 ;;
 869         -*)
 870                 usage
 871                 ;;
 872         *)
 873                 break
 874                 ;;
 875         esac
 876         shift
 877 done
 878
 879 # No command word defaults to "status"
 880 test -n "$command" || command=status
 881
 882 # "-b branch" is accepted only by "add"
 883 if test -n "$branch" && test "$command" != add
 884 then
 885         usage
 886 fi
 887
 888 # "--cached" is accepted only by "status" and "summary"
 889 if test -n "$cached" && test "$command" != status -a "$command" != summary
 890 then
 891         usage
 892 fi
 893
 894 "cmd_$command" "$@"