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