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         else
 235
 236                 module_clone "$path" "$realrepo" "$reference" || exit
 237                 (
 238                         clear_local_git_env
 239                         cd "$path" &&
 240                         # ash fails to wordsplit ${branch:+-b "$branch"...}
 241                         case "$branch" in
 242                         '') git checkout -f -q ;;
 243                         ?*) git checkout -f -q -b "$branch" "origin/$branch" ;;
 244                         esac
 245                 ) || die "Unable to checkout submodule '$path'"
 246         fi
 247         git config submodule."$path".url "$url"
 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                 if test -z "$(git config "submodule.$name.url")"
 344                 then
 345                         url=$(git config -f .gitmodules submodule."$name".url)
 346                         test -z "$url" &&
 347                         die "No url found for submodule path '$path' in .gitmodules"
 348
 349                         # Possibly a url relative to parent
 350                         case "$url" in
 351                         ./*|../*)
 352                                 url=$(resolve_relative_url "$url") || exit
 353                                 ;;
 354                         esac
 355                         git config submodule."$name".url "$url" ||
 356                         die "Failed to register url for submodule path '$path'"
 357                 fi
 358
 359                 # Copy "update" setting when it is not set yet
 360                 upd="$(git config -f .gitmodules submodule."$name".update)"
 361                 test -z "$upd" ||
 362                 test -n "$(git config submodule."$name".update)" ||
 363                 git config submodule."$name".update "$upd" ||
 364                 die "Failed to register update mode for submodule path '$path'"
 365
 366                 say "Submodule '$name' ($url) registered for path '$path'"
 367         done
 368 }
 369
 370 #
 371 # Update each submodule path to correct revision, using clone and checkout as needed
 372 #
 373 # $@ = requested paths (default to all)
 374 #
 375 cmd_update()
 376 {
 377         # parse $args after "submodule ... update".
 378         orig_args="$@"
 379         while test $# -ne 0
 380         do
 381                 case "$1" in
 382                 -q|--quiet)
 383                         shift
 384                         GIT_QUIET=1
 385                         ;;
 386                 -i|--init)
 387                         init=1
 388                         shift
 389                         ;;
 390                 -N|--no-fetch)
 391                         shift
 392                         nofetch=1
 393                         ;;
 394                 -r|--rebase)
 395                         shift
 396                         update="rebase"
 397                         ;;
 398                 --reference)
 399                         case "$2" in '') usage ;; esac
 400                         reference="--reference=$2"
 401                         shift 2
 402                         ;;
 403                 --reference=*)
 404                         reference="$1"
 405                         shift
 406                         ;;
 407                 -m|--merge)
 408                         shift
 409                         update="merge"
 410                         ;;
 411                 --recursive)
 412                         shift
 413                         recursive=1
 414                         ;;
 415                 --)
 416                         shift
 417                         break
 418                         ;;
 419                 -*)
 420                         usage
 421                         ;;
 422                 *)
 423                         break
 424                         ;;
 425                 esac
 426         done
 427
 428         if test -n "$init"
 429         then
 430                 cmd_init "--" "$@" || return
 431         fi
 432
 433         module_list "$@" |
 434         while read mode sha1 stage path
 435         do
 436                 name=$(module_name "$path") || exit
 437                 url=$(git config submodule."$name".url)
 438                 update_module=$(git config submodule."$name".update)
 439                 if test -z "$url"
 440                 then
 441                         # Only mention uninitialized submodules when its
 442                         # path have been specified
 443                         test "$#" != "0" &&
 444                         say "Submodule path '$path' not initialized" &&
 445                         say "Maybe you want to use 'update --init'?"
 446                         continue
 447                 fi
 448
 449                 if ! test -d "$path"/.git -o -f "$path"/.git
 450                 then
 451                         module_clone "$path" "$url" "$reference"|| exit
 452                         subsha1=
 453                 else
 454                         subsha1=$(clear_local_git_env; cd "$path" &&
 455                                 git rev-parse --verify HEAD) ||
 456                         die "Unable to find current revision in submodule path '$path'"
 457                 fi
 458
 459                 if ! test -z "$update"
 460                 then
 461                         update_module=$update
 462                 fi
 463
 464                 if test "$subsha1" != "$sha1"
 465                 then
 466                         force=
 467                         if test -z "$subsha1"
 468                         then
 469                                 force="-f"
 470                         fi
 471
 472                         if test -z "$nofetch"
 473                         then
 474                                 (clear_local_git_env; cd "$path" &&
 475                                         git-fetch) ||
 476                                 die "Unable to fetch in submodule path '$path'"
 477                         fi
 478
 479                         case "$update_module" in
 480                         rebase)
 481                                 command="git rebase"
 482                                 action="rebase"
 483                                 msg="rebased onto"
 484                                 ;;
 485                         merge)
 486                                 command="git merge"
 487                                 action="merge"
 488                                 msg="merged in"
 489                                 ;;
 490                         *)
 491                                 command="git checkout $force -q"
 492                                 action="checkout"
 493                                 msg="checked out"
 494                                 ;;
 495                         esac
 496
 497                         (clear_local_git_env; cd "$path" && $command "$sha1") ||
 498                         die "Unable to $action '$sha1' in submodule path '$path'"
 499                         say "Submodule path '$path': $msg '$sha1'"
 500                 fi
 501
 502                 if test -n "$recursive"
 503                 then
 504                         (clear_local_git_env; cd "$path" && cmd_update $orig_args) ||
 505                         die "Failed to recurse into submodule path '$path'"
 506                 fi
 507         done
 508 }
 509
 510 set_name_rev () {
 511         revname=$( (
 512                 clear_local_git_env
 513                 cd "$1" && {
 514                         git describe "$2" 2>/dev/null ||
 515                         git describe --tags "$2" 2>/dev/null ||
 516                         git describe --contains "$2" 2>/dev/null ||
 517                         git describe --all --always "$2"
 518                 }
 519         ) )
 520         test -z "$revname" || revname=" ($revname)"
 521 }
 522 #
 523 # Show commit summary for submodules in index or working tree
 524 #
 525 # If '--cached' is given, show summary between index and given commit,
 526 # or between working tree and given commit
 527 #
 528 # $@ = [commit (default 'HEAD'),] requested paths (default all)
 529 #
 530 cmd_summary() {
 531         summary_limit=-1
 532         for_status=
 533         diff_cmd=diff-index
 534
 535         # parse $args after "submodule ... summary".
 536         while test $# -ne 0
 537         do
 538                 case "$1" in
 539                 --cached)
 540                         cached="$1"
 541                         ;;
 542                 --files)
 543                         files="$1"
 544                         ;;
 545                 --for-status)
 546                         for_status="$1"
 547                         ;;
 548                 -n|--summary-limit)
 549                         if summary_limit=$(($2 + 0)) 2>/dev/null && test "$summary_limit" = "$2"
 550                         then
 551                                 :
 552                         else
 553                                 usage
 554                         fi
 555                         shift
 556                         ;;
 557                 --)
 558                         shift
 559                         break
 560                         ;;
 561                 -*)
 562                         usage
 563                         ;;
 564                 *)
 565                         break
 566                         ;;
 567                 esac
 568                 shift
 569         done
 570
 571         test $summary_limit = 0 && return
 572
 573         if rev=$(git rev-parse -q --verify --default HEAD ${1+"$1"})
 574         then
 575                 head=$rev
 576                 test $# = 0 || shift
 577         elif test -z "$1" -o "$1" = "HEAD"
 578         then
 579                 # before the first commit: compare with an empty tree
 580                 head=$(git hash-object -w -t tree --stdin </dev/null)
 581                 test -z "$1" || shift
 582         else
 583                 head="HEAD"
 584         fi
 585
 586         if [ -n "$files" ]
 587         then
 588                 test -n "$cached" &&
 589                 die "--cached cannot be used with --files"
 590                 diff_cmd=diff-files
 591                 head=
 592         fi
 593
 594         cd_to_toplevel
 595         # Get modified modules cared by user
 596         modules=$(git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- "$@" |
 597                 sane_egrep '^:([0-7]* )?160000' |
 598                 while read mod_src mod_dst sha1_src sha1_dst status name
 599                 do
 600                         # Always show modules deleted or type-changed (blob<->module)
 601                         test $status = D -o $status = T && echo "$name" && continue
 602                         # Also show added or modified modules which are checked out
 603                         GIT_DIR="$name/.git" git-rev-parse --git-dir >/dev/null 2>&1 &&
 604                         echo "$name"
 605                 done
 606         )
 607
 608         test -z "$modules" && return
 609
 610         git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- $modules |
 611         sane_egrep '^:([0-7]* )?160000' |
 612         cut -c2- |
 613         while read mod_src mod_dst sha1_src sha1_dst status name
 614         do
 615                 if test -z "$cached" &&
 616                         test $sha1_dst = 0000000000000000000000000000000000000000
 617                 then
 618                         case "$mod_dst" in
 619                         160000)
 620                                 sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
 621                                 ;;
 622                         100644 | 100755 | 120000)
 623                                 sha1_dst=$(git hash-object $name)
 624                                 ;;
 625                         000000)
 626                                 ;; # removed
 627                         *)
 628                                 # unexpected type
 629                                 echo >&2 "unexpected mode $mod_dst"
 630                                 continue ;;
 631                         esac
 632                 fi
 633                 missing_src=
 634                 missing_dst=
 635
 636                 test $mod_src = 160000 &&
 637                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_src^0 >/dev/null &&
 638                 missing_src=t
 639
 640                 test $mod_dst = 160000 &&
 641                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_dst^0 >/dev/null &&
 642                 missing_dst=t
 643
 644                 total_commits=
 645                 case "$missing_src,$missing_dst" in
 646                 t,)
 647                         errmsg="  Warn: $name doesn't contain commit $sha1_src"
 648                         ;;
 649                 ,t)
 650                         errmsg="  Warn: $name doesn't contain commit $sha1_dst"
 651                         ;;
 652                 t,t)
 653                         errmsg="  Warn: $name doesn't contain commits $sha1_src and $sha1_dst"
 654                         ;;
 655                 *)
 656                         errmsg=
 657                         total_commits=$(
 658                         if test $mod_src = 160000 -a $mod_dst = 160000
 659                         then
 660                                 range="$sha1_src...$sha1_dst"
 661                         elif test $mod_src = 160000
 662                         then
 663                                 range=$sha1_src
 664                         else
 665                                 range=$sha1_dst
 666                         fi
 667                         GIT_DIR="$name/.git" \
 668                         git rev-list --first-parent $range -- | wc -l
 669                         )
 670                         total_commits=" ($(($total_commits + 0)))"
 671                         ;;
 672                 esac
 673
 674                 sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
 675                 sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
 676                 if test $status = T
 677                 then
 678                         if test $mod_dst = 160000
 679                         then
 680                                 echo "* $name $sha1_abbr_src(blob)->$sha1_abbr_dst(submodule)$total_commits:"
 681                         else
 682                                 echo "* $name $sha1_abbr_src(submodule)->$sha1_abbr_dst(blob)$total_commits:"
 683                         fi
 684                 else
 685                         echo "* $name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
 686                 fi
 687                 if test -n "$errmsg"
 688                 then
 689                         # Don't give error msg for modification whose dst is not submodule
 690                         # i.e. deleted or changed to blob
 691                         test $mod_dst = 160000 && echo "$errmsg"
 692                 else
 693                         if test $mod_src = 160000 -a $mod_dst = 160000
 694                         then
 695                                 limit=
 696                                 test $summary_limit -gt 0 && limit="-$summary_limit"
 697                                 GIT_DIR="$name/.git" \
 698                                 git log $limit --pretty='format:  %m %s' \
 699                                 --first-parent $sha1_src...$sha1_dst
 700                         elif test $mod_dst = 160000
 701                         then
 702                                 GIT_DIR="$name/.git" \
 703                                 git log --pretty='format:  > %s' -1 $sha1_dst
 704                         else
 705                                 GIT_DIR="$name/.git" \
 706                                 git log --pretty='format:  < %s' -1 $sha1_src
 707                         fi
 708                         echo
 709                 fi
 710                 echo
 711         done |
 712         if test -n "$for_status"; then
 713                 if [ -n "$files" ]; then
 714                         echo "# Submodules changed but not updated:"
 715                 else
 716                         echo "# Submodule changes to be committed:"
 717                 fi
 718                 echo "#"
 719                 sed -e 's|^|# |' -e 's|^# $|#|'
 720         else
 721                 cat
 722         fi
 723 }
 724 #
 725 # List all submodules, prefixed with:
 726 #  - submodule not initialized
 727 #  + different revision checked out
 728 #
 729 # If --cached was specified the revision in the index will be printed
 730 # instead of the currently checked out revision.
 731 #
 732 # $@ = requested paths (default to all)
 733 #
 734 cmd_status()
 735 {
 736         # parse $args after "submodule ... status".
 737         orig_args="$@"
 738         while test $# -ne 0
 739         do
 740                 case "$1" in
 741                 -q|--quiet)
 742                         GIT_QUIET=1
 743                         ;;
 744                 --cached)
 745                         cached=1
 746                         ;;
 747                 --recursive)
 748                         recursive=1
 749                         ;;
 750                 --)
 751                         shift
 752                         break
 753                         ;;
 754                 -*)
 755                         usage
 756                         ;;
 757                 *)
 758                         break
 759                         ;;
 760                 esac
 761                 shift
 762         done
 763
 764         module_list "$@" |
 765         while read mode sha1 stage path
 766         do
 767                 name=$(module_name "$path") || exit
 768                 url=$(git config submodule."$name".url)
 769                 displaypath="$prefix$path"
 770                 if test -z "$url" || ! test -d "$path"/.git -o -f "$path"/.git
 771                 then
 772                         say "-$sha1 $displaypath"
 773                         continue;
 774                 fi
 775                 set_name_rev "$path" "$sha1"
 776                 if git diff-files --ignore-submodules=dirty --quiet -- "$path"
 777                 then
 778                         say " $sha1 $displaypath$revname"
 779                 else
 780                         if test -z "$cached"
 781                         then
 782                                 sha1=$(clear_local_git_env; cd "$path" && git rev-parse --verify HEAD)
 783                                 set_name_rev "$path" "$sha1"
 784                         fi
 785                         say "+$sha1 $displaypath$revname"
 786                 fi
 787
 788                 if test -n "$recursive"
 789                 then
 790                         (
 791                                 prefix="$displaypath/"
 792                                 clear_local_git_env
 793                                 cd "$path" &&
 794                                 cmd_status $orig_args
 795                         ) ||
 796                         die "Failed to recurse into submodule path '$path'"
 797                 fi
 798         done
 799 }
 800 #
 801 # Sync remote urls for submodules
 802 # This makes the value for remote.$remote.url match the value
 803 # specified in .gitmodules.
 804 #
 805 cmd_sync()
 806 {
 807         while test $# -ne 0
 808         do
 809                 case "$1" in
 810                 -q|--quiet)
 811                         GIT_QUIET=1
 812                         shift
 813                         ;;
 814                 --)
 815                         shift
 816                         break
 817                         ;;
 818                 -*)
 819                         usage
 820                         ;;
 821                 *)
 822                         break
 823                         ;;
 824                 esac
 825         done
 826         cd_to_toplevel
 827         module_list "$@" |
 828         while read mode sha1 stage path
 829         do
 830                 name=$(module_name "$path")
 831                 url=$(git config -f .gitmodules --get submodule."$name".url)
 832
 833                 # Possibly a url relative to parent
 834                 case "$url" in
 835                 ./*|../*)
 836                         url=$(resolve_relative_url "$url") || exit
 837                         ;;
 838                 esac
 839
 840                 if git config "submodule.$name.url" >/dev/null 2>/dev/null
 841                 then
 842                         say "Synchronizing submodule url for '$name'"
 843                         git config submodule."$name".url "$url"
 844
 845                         if test -e "$path"/.git
 846                         then
 847                         (
 848                                 clear_local_git_env
 849                                 cd "$path"
 850                                 remote=$(get_default_remote)
 851                                 git config remote."$remote".url "$url"
 852                         )
 853                         fi
 854                 fi
 855         done
 856 }
 857
 858 # This loop parses the command line arguments to find the
 859 # subcommand name to dispatch.  Parsing of the subcommand specific
 860 # options are primarily done by the subcommand implementations.
 861 # Subcommand specific options such as --branch and --cached are
 862 # parsed here as well, for backward compatibility.
 863
 864 while test $# != 0 && test -z "$command"
 865 do
 866         case "$1" in
 867         add | foreach | init | update | status | summary | sync)
 868                 command=$1
 869                 ;;
 870         -q|--quiet)
 871                 GIT_QUIET=1
 872                 ;;
 873         -b|--branch)
 874                 case "$2" in
 875                 '')
 876                         usage
 877                         ;;
 878                 esac
 879                 branch="$2"; shift
 880                 ;;
 881         --cached)
 882                 cached="$1"
 883                 ;;
 884         --)
 885                 break
 886                 ;;
 887         -*)
 888                 usage
 889                 ;;
 890         *)
 891                 break
 892                 ;;
 893         esac
 894         shift
 895 done
 896
 897 # No command word defaults to "status"
 898 test -n "$command" || command=status
 899
 900 # "-b branch" is accepted only by "add"
 901 if test -n "$branch" && test "$command" != add
 902 then
 903         usage
 904 fi
 905
 906 # "--cached" is accepted only by "status" and "summary"
 907 if test -n "$cached" && test "$command" != status -a "$command" != summary
 908 then
 909         usage
 910 fi
 911
 912 "cmd_$command" "$@"