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_flags=
 378         while test $# -ne 0
 379         do
 380                 case "$1" in
 381                 -q|--quiet)
 382                         GIT_QUIET=1
 383                         ;;
 384                 -i|--init)
 385                         init=1
 386                         ;;
 387                 -N|--no-fetch)
 388                         nofetch=1
 389                         ;;
 390                 -r|--rebase)
 391                         update="rebase"
 392                         ;;
 393                 --reference)
 394                         case "$2" in '') usage ;; esac
 395                         reference="--reference=$2"
 396                         orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 397                         shift
 398                         ;;
 399                 --reference=*)
 400                         reference="$1"
 401                         ;;
 402                 -m|--merge)
 403                         update="merge"
 404                         ;;
 405                 --recursive)
 406                         recursive=1
 407                         ;;
 408                 --)
 409                         shift
 410                         break
 411                         ;;
 412                 -*)
 413                         usage
 414                         ;;
 415                 *)
 416                         break
 417                         ;;
 418                 esac
 419                 orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 420                 shift
 421         done
 422
 423         if test -n "$init"
 424         then
 425                 cmd_init "--" "$@" || return
 426         fi
 427
 428         module_list "$@" |
 429         while read mode sha1 stage path
 430         do
 431                 name=$(module_name "$path") || exit
 432                 url=$(git config submodule."$name".url)
 433                 update_module=$(git config submodule."$name".update)
 434                 if test -z "$url"
 435                 then
 436                         # Only mention uninitialized submodules when its
 437                         # path have been specified
 438                         test "$#" != "0" &&
 439                         say "Submodule path '$path' not initialized" &&
 440                         say "Maybe you want to use 'update --init'?"
 441                         continue
 442                 fi
 443
 444                 if ! test -d "$path"/.git -o -f "$path"/.git
 445                 then
 446                         module_clone "$path" "$url" "$reference"|| exit
 447                         subsha1=
 448                 else
 449                         subsha1=$(clear_local_git_env; cd "$path" &&
 450                                 git rev-parse --verify HEAD) ||
 451                         die "Unable to find current revision in submodule path '$path'"
 452                 fi
 453
 454                 if ! test -z "$update"
 455                 then
 456                         update_module=$update
 457                 fi
 458
 459                 if test "$subsha1" != "$sha1"
 460                 then
 461                         force=
 462                         if test -z "$subsha1"
 463                         then
 464                                 force="-f"
 465                         fi
 466
 467                         if test -z "$nofetch"
 468                         then
 469                                 (clear_local_git_env; cd "$path" &&
 470                                         git-fetch) ||
 471                                 die "Unable to fetch in submodule path '$path'"
 472                         fi
 473
 474                         case "$update_module" in
 475                         rebase)
 476                                 command="git rebase"
 477                                 action="rebase"
 478                                 msg="rebased onto"
 479                                 ;;
 480                         merge)
 481                                 command="git merge"
 482                                 action="merge"
 483                                 msg="merged in"
 484                                 ;;
 485                         *)
 486                                 command="git checkout $force -q"
 487                                 action="checkout"
 488                                 msg="checked out"
 489                                 ;;
 490                         esac
 491
 492                         (clear_local_git_env; cd "$path" && $command "$sha1") ||
 493                         die "Unable to $action '$sha1' in submodule path '$path'"
 494                         say "Submodule path '$path': $msg '$sha1'"
 495                 fi
 496
 497                 if test -n "$recursive"
 498                 then
 499                         (clear_local_git_env; cd "$path" && eval cmd_update "$orig_flags") ||
 500                         die "Failed to recurse into submodule path '$path'"
 501                 fi
 502         done
 503 }
 504
 505 set_name_rev () {
 506         revname=$( (
 507                 clear_local_git_env
 508                 cd "$1" && {
 509                         git describe "$2" 2>/dev/null ||
 510                         git describe --tags "$2" 2>/dev/null ||
 511                         git describe --contains "$2" 2>/dev/null ||
 512                         git describe --all --always "$2"
 513                 }
 514         ) )
 515         test -z "$revname" || revname=" ($revname)"
 516 }
 517 #
 518 # Show commit summary for submodules in index or working tree
 519 #
 520 # If '--cached' is given, show summary between index and given commit,
 521 # or between working tree and given commit
 522 #
 523 # $@ = [commit (default 'HEAD'),] requested paths (default all)
 524 #
 525 cmd_summary() {
 526         summary_limit=-1
 527         for_status=
 528         diff_cmd=diff-index
 529
 530         # parse $args after "submodule ... summary".
 531         while test $# -ne 0
 532         do
 533                 case "$1" in
 534                 --cached)
 535                         cached="$1"
 536                         ;;
 537                 --files)
 538                         files="$1"
 539                         ;;
 540                 --for-status)
 541                         for_status="$1"
 542                         ;;
 543                 -n|--summary-limit)
 544                         if summary_limit=$(($2 + 0)) 2>/dev/null && test "$summary_limit" = "$2"
 545                         then
 546                                 :
 547                         else
 548                                 usage
 549                         fi
 550                         shift
 551                         ;;
 552                 --)
 553                         shift
 554                         break
 555                         ;;
 556                 -*)
 557                         usage
 558                         ;;
 559                 *)
 560                         break
 561                         ;;
 562                 esac
 563                 shift
 564         done
 565
 566         test $summary_limit = 0 && return
 567
 568         if rev=$(git rev-parse -q --verify --default HEAD ${1+"$1"})
 569         then
 570                 head=$rev
 571                 test $# = 0 || shift
 572         elif test -z "$1" -o "$1" = "HEAD"
 573         then
 574                 # before the first commit: compare with an empty tree
 575                 head=$(git hash-object -w -t tree --stdin </dev/null)
 576                 test -z "$1" || shift
 577         else
 578                 head="HEAD"
 579         fi
 580
 581         if [ -n "$files" ]
 582         then
 583                 test -n "$cached" &&
 584                 die "--cached cannot be used with --files"
 585                 diff_cmd=diff-files
 586                 head=
 587         fi
 588
 589         cd_to_toplevel
 590         # Get modified modules cared by user
 591         modules=$(git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- "$@" |
 592                 sane_egrep '^:([0-7]* )?160000' |
 593                 while read mod_src mod_dst sha1_src sha1_dst status name
 594                 do
 595                         # Always show modules deleted or type-changed (blob<->module)
 596                         test $status = D -o $status = T && echo "$name" && continue
 597                         # Also show added or modified modules which are checked out
 598                         GIT_DIR="$name/.git" git-rev-parse --git-dir >/dev/null 2>&1 &&
 599                         echo "$name"
 600                 done
 601         )
 602
 603         test -z "$modules" && return
 604
 605         git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- $modules |
 606         sane_egrep '^:([0-7]* )?160000' |
 607         cut -c2- |
 608         while read mod_src mod_dst sha1_src sha1_dst status name
 609         do
 610                 if test -z "$cached" &&
 611                         test $sha1_dst = 0000000000000000000000000000000000000000
 612                 then
 613                         case "$mod_dst" in
 614                         160000)
 615                                 sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
 616                                 ;;
 617                         100644 | 100755 | 120000)
 618                                 sha1_dst=$(git hash-object $name)
 619                                 ;;
 620                         000000)
 621                                 ;; # removed
 622                         *)
 623                                 # unexpected type
 624                                 echo >&2 "unexpected mode $mod_dst"
 625                                 continue ;;
 626                         esac
 627                 fi
 628                 missing_src=
 629                 missing_dst=
 630
 631                 test $mod_src = 160000 &&
 632                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_src^0 >/dev/null &&
 633                 missing_src=t
 634
 635                 test $mod_dst = 160000 &&
 636                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_dst^0 >/dev/null &&
 637                 missing_dst=t
 638
 639                 total_commits=
 640                 case "$missing_src,$missing_dst" in
 641                 t,)
 642                         errmsg="  Warn: $name doesn't contain commit $sha1_src"
 643                         ;;
 644                 ,t)
 645                         errmsg="  Warn: $name doesn't contain commit $sha1_dst"
 646                         ;;
 647                 t,t)
 648                         errmsg="  Warn: $name doesn't contain commits $sha1_src and $sha1_dst"
 649                         ;;
 650                 *)
 651                         errmsg=
 652                         total_commits=$(
 653                         if test $mod_src = 160000 -a $mod_dst = 160000
 654                         then
 655                                 range="$sha1_src...$sha1_dst"
 656                         elif test $mod_src = 160000
 657                         then
 658                                 range=$sha1_src
 659                         else
 660                                 range=$sha1_dst
 661                         fi
 662                         GIT_DIR="$name/.git" \
 663                         git rev-list --first-parent $range -- | wc -l
 664                         )
 665                         total_commits=" ($(($total_commits + 0)))"
 666                         ;;
 667                 esac
 668
 669                 sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
 670                 sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
 671                 if test $status = T
 672                 then
 673                         if test $mod_dst = 160000
 674                         then
 675                                 echo "* $name $sha1_abbr_src(blob)->$sha1_abbr_dst(submodule)$total_commits:"
 676                         else
 677                                 echo "* $name $sha1_abbr_src(submodule)->$sha1_abbr_dst(blob)$total_commits:"
 678                         fi
 679                 else
 680                         echo "* $name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
 681                 fi
 682                 if test -n "$errmsg"
 683                 then
 684                         # Don't give error msg for modification whose dst is not submodule
 685                         # i.e. deleted or changed to blob
 686                         test $mod_dst = 160000 && echo "$errmsg"
 687                 else
 688                         if test $mod_src = 160000 -a $mod_dst = 160000
 689                         then
 690                                 limit=
 691                                 test $summary_limit -gt 0 && limit="-$summary_limit"
 692                                 GIT_DIR="$name/.git" \
 693                                 git log $limit --pretty='format:  %m %s' \
 694                                 --first-parent $sha1_src...$sha1_dst
 695                         elif test $mod_dst = 160000
 696                         then
 697                                 GIT_DIR="$name/.git" \
 698                                 git log --pretty='format:  > %s' -1 $sha1_dst
 699                         else
 700                                 GIT_DIR="$name/.git" \
 701                                 git log --pretty='format:  < %s' -1 $sha1_src
 702                         fi
 703                         echo
 704                 fi
 705                 echo
 706         done |
 707         if test -n "$for_status"; then
 708                 if [ -n "$files" ]; then
 709                         echo "# Submodules changed but not updated:"
 710                 else
 711                         echo "# Submodule changes to be committed:"
 712                 fi
 713                 echo "#"
 714                 sed -e 's|^|# |' -e 's|^# $|#|'
 715         else
 716                 cat
 717         fi
 718 }
 719 #
 720 # List all submodules, prefixed with:
 721 #  - submodule not initialized
 722 #  + different revision checked out
 723 #
 724 # If --cached was specified the revision in the index will be printed
 725 # instead of the currently checked out revision.
 726 #
 727 # $@ = requested paths (default to all)
 728 #
 729 cmd_status()
 730 {
 731         # parse $args after "submodule ... status".
 732         orig_flags=
 733         while test $# -ne 0
 734         do
 735                 case "$1" in
 736                 -q|--quiet)
 737                         GIT_QUIET=1
 738                         ;;
 739                 --cached)
 740                         cached=1
 741                         ;;
 742                 --recursive)
 743                         recursive=1
 744                         ;;
 745                 --)
 746                         shift
 747                         break
 748                         ;;
 749                 -*)
 750                         usage
 751                         ;;
 752                 *)
 753                         break
 754                         ;;
 755                 esac
 756                 orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 757                 shift
 758         done
 759
 760         module_list "$@" |
 761         while read mode sha1 stage path
 762         do
 763                 name=$(module_name "$path") || exit
 764                 url=$(git config submodule."$name".url)
 765                 displaypath="$prefix$path"
 766                 if test -z "$url" || ! test -d "$path"/.git -o -f "$path"/.git
 767                 then
 768                         say "-$sha1 $displaypath"
 769                         continue;
 770                 fi
 771                 set_name_rev "$path" "$sha1"
 772                 if git diff-files --ignore-submodules=dirty --quiet -- "$path"
 773                 then
 774                         say " $sha1 $displaypath$revname"
 775                 else
 776                         if test -z "$cached"
 777                         then
 778                                 sha1=$(clear_local_git_env; cd "$path" && git rev-parse --verify HEAD)
 779                                 set_name_rev "$path" "$sha1"
 780                         fi
 781                         say "+$sha1 $displaypath$revname"
 782                 fi
 783
 784                 if test -n "$recursive"
 785                 then
 786                         (
 787                                 prefix="$displaypath/"
 788                                 clear_local_git_env
 789                                 cd "$path" &&
 790                                 eval cmd_status "$orig_args"
 791                         ) ||
 792                         die "Failed to recurse into submodule path '$path'"
 793                 fi
 794         done
 795 }
 796 #
 797 # Sync remote urls for submodules
 798 # This makes the value for remote.$remote.url match the value
 799 # specified in .gitmodules.
 800 #
 801 cmd_sync()
 802 {
 803         while test $# -ne 0
 804         do
 805                 case "$1" in
 806                 -q|--quiet)
 807                         GIT_QUIET=1
 808                         shift
 809                         ;;
 810                 --)
 811                         shift
 812                         break
 813                         ;;
 814                 -*)
 815                         usage
 816                         ;;
 817                 *)
 818                         break
 819                         ;;
 820                 esac
 821         done
 822         cd_to_toplevel
 823         module_list "$@" |
 824         while read mode sha1 stage path
 825         do
 826                 name=$(module_name "$path")
 827                 url=$(git config -f .gitmodules --get submodule."$name".url)
 828
 829                 # Possibly a url relative to parent
 830                 case "$url" in
 831                 ./*|../*)
 832                         url=$(resolve_relative_url "$url") || exit
 833                         ;;
 834                 esac
 835
 836                 say "Synchronizing submodule url for '$name'"
 837                 git config submodule."$name".url "$url"
 838
 839                 if test -e "$path"/.git
 840                 then
 841                 (
 842                         clear_local_git_env
 843                         cd "$path"
 844                         remote=$(get_default_remote)
 845                         git config remote."$remote".url "$url"
 846                 )
 847                 fi
 848         done
 849 }
 850
 851 # This loop parses the command line arguments to find the
 852 # subcommand name to dispatch.  Parsing of the subcommand specific
 853 # options are primarily done by the subcommand implementations.
 854 # Subcommand specific options such as --branch and --cached are
 855 # parsed here as well, for backward compatibility.
 856
 857 while test $# != 0 && test -z "$command"
 858 do
 859         case "$1" in
 860         add | foreach | init | update | status | summary | sync)
 861                 command=$1
 862                 ;;
 863         -q|--quiet)
 864                 GIT_QUIET=1
 865                 ;;
 866         -b|--branch)
 867                 case "$2" in
 868                 '')
 869                         usage
 870                         ;;
 871                 esac
 872                 branch="$2"; shift
 873                 ;;
 874         --cached)
 875                 cached="$1"
 876                 ;;
 877         --)
 878                 break
 879                 ;;
 880         -*)
 881                 usage
 882                 ;;
 883         *)
 884                 break
 885                 ;;
 886         esac
 887         shift
 888 done
 889
 890 # No command word defaults to "status"
 891 test -n "$command" || command=status
 892
 893 # "-b branch" is accepted only by "add"
 894 if test -n "$branch" && test "$command" != add
 895 then
 896         usage
 897 fi
 898
 899 # "--cached" is accepted only by "status" and "summary"
 900 if test -n "$cached" && test "$command" != status -a "$command" != summary
 901 then
 902         usage
 903 fi
 904
 905 "cmd_$command" "$@"