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         sep=/
  41         while test -n "$url"
  42         do
  43                 case "$url" in
  44                 ../*)
  45                         url="${url#../}"
  46                         case "$remoteurl" in
  47                         */*)
  48                                 remoteurl="${remoteurl%/*}"
  49                                 ;;
  50                         *:*)
  51                                 remoteurl="${remoteurl%:*}"
  52                                 sep=:
  53                                 ;;
  54                         *)
  55                                 die "cannot strip one component off url '$remoteurl'"
  56                                 ;;
  57                         esac
  58                         ;;
  59                 ./*)
  60                         url="${url#./}"
  61                         ;;
  62                 *)
  63                         break;;
  64                 esac
  65         done
  66         echo "$remoteurl$sep${url%/}"
  67 }
  68
  69 #
  70 # Get submodule info for registered submodules
  71 # $@ = path to limit submodule list
  72 #
  73 module_list()
  74 {
  75         git ls-files --error-unmatch --stage -- "$@" | sane_grep '^160000 '
  76 }
  77
  78 #
  79 # Map submodule path to submodule name
  80 #
  81 # $1 = path
  82 #
  83 module_name()
  84 {
  85         # Do we have "submodule.<something>.path = $1" defined in .gitmodules file?
  86         re=$(printf '%s\n' "$1" | sed -e 's/[].[^$\\*]/\\&/g')
  87         name=$( git config -f .gitmodules --get-regexp '^submodule\..*\.path$' |
  88                 sed -n -e 's|^submodule\.\(.*\)\.path '"$re"'$|\1|p' )
  89        test -z "$name" &&
  90        die "No submodule mapping found in .gitmodules for path '$path'"
  91        echo "$name"
  92 }
  93
  94 #
  95 # Clone a submodule
  96 #
  97 # Prior to calling, cmd_update checks that a possibly existing
  98 # path is not a git repository.
  99 # Likewise, cmd_add checks that path does not exist at all,
 100 # since it is the location of a new submodule.
 101 #
 102 module_clone()
 103 {
 104         path=$1
 105         url=$2
 106         reference="$3"
 107
 108         if test -n "$reference"
 109         then
 110                 git-clone "$reference" -n "$url" "$path"
 111         else
 112                 git-clone -n "$url" "$path"
 113         fi ||
 114         die "Clone of '$url' into submodule path '$path' failed"
 115 }
 116
 117 #
 118 # Add a new submodule to the working tree, .gitmodules and the index
 119 #
 120 # $@ = repo path
 121 #
 122 # optional branch is stored in global branch variable
 123 #
 124 cmd_add()
 125 {
 126         # parse $args after "submodule ... add".
 127         while test $# -ne 0
 128         do
 129                 case "$1" in
 130                 -b | --branch)
 131                         case "$2" in '') usage ;; esac
 132                         branch=$2
 133                         shift
 134                         ;;
 135                 -f | --force)
 136                         force=$1
 137                         ;;
 138                 -q|--quiet)
 139                         GIT_QUIET=1
 140                         ;;
 141                 --reference)
 142                         case "$2" in '') usage ;; esac
 143                         reference="--reference=$2"
 144                         shift
 145                         ;;
 146                 --reference=*)
 147                         reference="$1"
 148                         shift
 149                         ;;
 150                 --)
 151                         shift
 152                         break
 153                         ;;
 154                 -*)
 155                         usage
 156                         ;;
 157                 *)
 158                         break
 159                         ;;
 160                 esac
 161                 shift
 162         done
 163
 164         repo=$1
 165         path=$2
 166
 167         if test -z "$path"; then
 168                 path=$(echo "$repo" |
 169                         sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
 170         fi
 171
 172         if test -z "$repo" -o -z "$path"; then
 173                 usage
 174         fi
 175
 176         # assure repo is absolute or relative to parent
 177         case "$repo" in
 178         ./*|../*)
 179                 # dereference source url relative to parent's url
 180                 realrepo=$(resolve_relative_url "$repo") || exit
 181                 ;;
 182         *:*|/*)
 183                 # absolute url
 184                 realrepo=$repo
 185                 ;;
 186         *)
 187                 die "repo URL: '$repo' must be absolute or begin with ./|../"
 188         ;;
 189         esac
 190
 191         # normalize path:
 192         # multiple //; leading ./; /./; /../; trailing /
 193         path=$(printf '%s/\n' "$path" |
 194                 sed -e '
 195                         s|//*|/|g
 196                         s|^\(\./\)*||
 197                         s|/\./|/|g
 198                         :start
 199                         s|\([^/]*\)/\.\./||
 200                         tstart
 201                         s|/*$||
 202                 ')
 203         git ls-files --error-unmatch "$path" > /dev/null 2>&1 &&
 204         die "'$path' already exists in the index"
 205
 206         if test -z "$force" && ! git add --dry-run --ignore-missing "$path" > /dev/null 2>&1
 207         then
 208                 echo >&2 "The following path is ignored by one of your .gitignore files:" &&
 209                 echo >&2 $path &&
 210                 echo >&2 "Use -f if you really want to add it."
 211                 exit 1
 212         fi
 213
 214         # perhaps the path exists and is already a git repo, else clone it
 215         if test -e "$path"
 216         then
 217                 if test -d "$path"/.git -o -f "$path"/.git
 218                 then
 219                         echo "Adding existing repo at '$path' to the index"
 220                 else
 221                         die "'$path' already exists and is not a valid git repo"
 222                 fi
 223
 224                 case "$repo" in
 225                 ./*|../*)
 226                         url=$(resolve_relative_url "$repo") || exit
 227                     ;;
 228                 *)
 229                         url="$repo"
 230                         ;;
 231                 esac
 232                 git config submodule."$path".url "$url"
 233         else
 234
 235                 module_clone "$path" "$realrepo" "$reference" || exit
 236                 (
 237                         clear_local_git_env
 238                         cd "$path" &&
 239                         # ash fails to wordsplit ${branch:+-b "$branch"...}
 240                         case "$branch" in
 241                         '') git checkout -f -q ;;
 242                         ?*) git checkout -f -q -B "$branch" "origin/$branch" ;;
 243                         esac
 244                 ) || die "Unable to checkout submodule '$path'"
 245         fi
 246
 247         git add $force "$path" ||
 248         die "Failed to add submodule '$path'"
 249
 250         git config -f .gitmodules submodule."$path".path "$path" &&
 251         git config -f .gitmodules submodule."$path".url "$repo" &&
 252         git add --force .gitmodules ||
 253         die "Failed to register submodule '$path'"
 254 }
 255
 256 #
 257 # Execute an arbitrary command sequence in each checked out
 258 # submodule
 259 #
 260 # $@ = command to execute
 261 #
 262 cmd_foreach()
 263 {
 264         # parse $args after "submodule ... foreach".
 265         while test $# -ne 0
 266         do
 267                 case "$1" in
 268                 -q|--quiet)
 269                         GIT_QUIET=1
 270                         ;;
 271                 --recursive)
 272                         recursive=1
 273                         ;;
 274                 -*)
 275                         usage
 276                         ;;
 277                 *)
 278                         break
 279                         ;;
 280                 esac
 281                 shift
 282         done
 283
 284         toplevel=$(pwd)
 285
 286         module_list |
 287         while read mode sha1 stage path
 288         do
 289                 if test -e "$path"/.git
 290                 then
 291                         say "Entering '$prefix$path'"
 292                         name=$(module_name "$path")
 293                         (
 294                                 prefix="$prefix$path/"
 295                                 clear_local_git_env
 296                                 cd "$path" &&
 297                                 eval "$@" &&
 298                                 if test -n "$recursive"
 299                                 then
 300                                         cmd_foreach "--recursive" "$@"
 301                                 fi
 302                         ) ||
 303                         die "Stopping at '$path'; script returned non-zero status."
 304                 fi
 305         done
 306 }
 307
 308 #
 309 # Register submodules in .git/config
 310 #
 311 # $@ = requested paths (default to all)
 312 #
 313 cmd_init()
 314 {
 315         # parse $args after "submodule ... init".
 316         while test $# -ne 0
 317         do
 318                 case "$1" in
 319                 -q|--quiet)
 320                         GIT_QUIET=1
 321                         ;;
 322                 --)
 323                         shift
 324                         break
 325                         ;;
 326                 -*)
 327                         usage
 328                         ;;
 329                 *)
 330                         break
 331                         ;;
 332                 esac
 333                 shift
 334         done
 335
 336         module_list "$@" |
 337         while read mode sha1 stage path
 338         do
 339                 # Skip already registered paths
 340                 name=$(module_name "$path") || exit
 341                 url=$(git config submodule."$name".url)
 342                 test -z "$url" || continue
 343
 344                 url=$(git config -f .gitmodules submodule."$name".url)
 345                 test -z "$url" &&
 346                 die "No url found for submodule path '$path' in .gitmodules"
 347
 348                 # Possibly a url relative to parent
 349                 case "$url" in
 350                 ./*|../*)
 351                         url=$(resolve_relative_url "$url") || exit
 352                         ;;
 353                 esac
 354
 355                 git config submodule."$name".url "$url" ||
 356                 die "Failed to register url for submodule path '$path'"
 357
 358                 upd="$(git config -f .gitmodules submodule."$name".update)"
 359                 test -z "$upd" ||
 360                 git config submodule."$name".update "$upd" ||
 361                 die "Failed to register update mode for submodule path '$path'"
 362
 363                 say "Submodule '$name' ($url) registered for path '$path'"
 364         done
 365 }
 366
 367 #
 368 # Update each submodule path to correct revision, using clone and checkout as needed
 369 #
 370 # $@ = requested paths (default to all)
 371 #
 372 cmd_update()
 373 {
 374         # parse $args after "submodule ... update".
 375         orig_flags=
 376         while test $# -ne 0
 377         do
 378                 case "$1" in
 379                 -q|--quiet)
 380                         GIT_QUIET=1
 381                         ;;
 382                 -i|--init)
 383                         init=1
 384                         ;;
 385                 -N|--no-fetch)
 386                         nofetch=1
 387                         ;;
 388                 -r|--rebase)
 389                         update="rebase"
 390                         ;;
 391                 --reference)
 392                         case "$2" in '') usage ;; esac
 393                         reference="--reference=$2"
 394                         orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 395                         shift
 396                         ;;
 397                 --reference=*)
 398                         reference="$1"
 399                         ;;
 400                 -m|--merge)
 401                         update="merge"
 402                         ;;
 403                 --recursive)
 404                         recursive=1
 405                         ;;
 406                 --)
 407                         shift
 408                         break
 409                         ;;
 410                 -*)
 411                         usage
 412                         ;;
 413                 *)
 414                         break
 415                         ;;
 416                 esac
 417                 orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 418                 shift
 419         done
 420
 421         if test -n "$init"
 422         then
 423                 cmd_init "--" "$@" || return
 424         fi
 425
 426         cloned_modules=
 427         module_list "$@" |
 428         while read mode sha1 stage path
 429         do
 430                 name=$(module_name "$path") || exit
 431                 url=$(git config submodule."$name".url)
 432                 update_module=$(git config submodule."$name".update)
 433                 if test -z "$url"
 434                 then
 435                         # Only mention uninitialized submodules when its
 436                         # path have been specified
 437                         test "$#" != "0" &&
 438                         say "Submodule path '$path' not initialized" &&
 439                         say "Maybe you want to use 'update --init'?"
 440                         continue
 441                 fi
 442
 443                 if ! test -d "$path"/.git -o -f "$path"/.git
 444                 then
 445                         module_clone "$path" "$url" "$reference"|| exit
 446                         cloned_modules="$cloned_modules;$name"
 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                                 # Run fetch only if $sha1 isn't present or it
 470                                 # is not reachable from a ref.
 471                                 (clear_local_git_env; cd "$path" &&
 472                                         ((rev=$(git rev-list -n 1 $sha1 --not --all 2>/dev/null) &&
 473                                          test -z "$rev") || git-fetch)) ||
 474                                 die "Unable to fetch in submodule path '$path'"
 475                         fi
 476
 477                         # Is this something we just cloned?
 478                         case ";$cloned_modules;" in
 479                         *";$name;"*)
 480                                 # then there is no local change to integrate
 481                                 update_module= ;;
 482                         esac
 483
 484                         case "$update_module" in
 485                         rebase)
 486                                 command="git rebase"
 487                                 action="rebase"
 488                                 msg="rebased onto"
 489                                 ;;
 490                         merge)
 491                                 command="git merge"
 492                                 action="merge"
 493                                 msg="merged in"
 494                                 ;;
 495                         *)
 496                                 command="git checkout $force -q"
 497                                 action="checkout"
 498                                 msg="checked out"
 499                                 ;;
 500                         esac
 501
 502                         (clear_local_git_env; cd "$path" && $command "$sha1") ||
 503                         die "Unable to $action '$sha1' in submodule path '$path'"
 504                         say "Submodule path '$path': $msg '$sha1'"
 505                 fi
 506
 507                 if test -n "$recursive"
 508                 then
 509                         (clear_local_git_env; cd "$path" && eval cmd_update "$orig_flags") ||
 510                         die "Failed to recurse into submodule path '$path'"
 511                 fi
 512         done
 513 }
 514
 515 set_name_rev () {
 516         revname=$( (
 517                 clear_local_git_env
 518                 cd "$1" && {
 519                         git describe "$2" 2>/dev/null ||
 520                         git describe --tags "$2" 2>/dev/null ||
 521                         git describe --contains "$2" 2>/dev/null ||
 522                         git describe --all --always "$2"
 523                 }
 524         ) )
 525         test -z "$revname" || revname=" ($revname)"
 526 }
 527 #
 528 # Show commit summary for submodules in index or working tree
 529 #
 530 # If '--cached' is given, show summary between index and given commit,
 531 # or between working tree and given commit
 532 #
 533 # $@ = [commit (default 'HEAD'),] requested paths (default all)
 534 #
 535 cmd_summary() {
 536         summary_limit=-1
 537         for_status=
 538         diff_cmd=diff-index
 539
 540         # parse $args after "submodule ... summary".
 541         while test $# -ne 0
 542         do
 543                 case "$1" in
 544                 --cached)
 545                         cached="$1"
 546                         ;;
 547                 --files)
 548                         files="$1"
 549                         ;;
 550                 --for-status)
 551                         for_status="$1"
 552                         ;;
 553                 -n|--summary-limit)
 554                         if summary_limit=$(($2 + 0)) 2>/dev/null && test "$summary_limit" = "$2"
 555                         then
 556                                 :
 557                         else
 558                                 usage
 559                         fi
 560                         shift
 561                         ;;
 562                 --)
 563                         shift
 564                         break
 565                         ;;
 566                 -*)
 567                         usage
 568                         ;;
 569                 *)
 570                         break
 571                         ;;
 572                 esac
 573                 shift
 574         done
 575
 576         test $summary_limit = 0 && return
 577
 578         if rev=$(git rev-parse -q --verify --default HEAD ${1+"$1"})
 579         then
 580                 head=$rev
 581                 test $# = 0 || shift
 582         elif test -z "$1" -o "$1" = "HEAD"
 583         then
 584                 # before the first commit: compare with an empty tree
 585                 head=$(git hash-object -w -t tree --stdin </dev/null)
 586                 test -z "$1" || shift
 587         else
 588                 head="HEAD"
 589         fi
 590
 591         if [ -n "$files" ]
 592         then
 593                 test -n "$cached" &&
 594                 die "--cached cannot be used with --files"
 595                 diff_cmd=diff-files
 596                 head=
 597         fi
 598
 599         cd_to_toplevel
 600         # Get modified modules cared by user
 601         modules=$(git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- "$@" |
 602                 sane_egrep '^:([0-7]* )?160000' |
 603                 while read mod_src mod_dst sha1_src sha1_dst status name
 604                 do
 605                         # Always show modules deleted or type-changed (blob<->module)
 606                         test $status = D -o $status = T && echo "$name" && continue
 607                         # Also show added or modified modules which are checked out
 608                         GIT_DIR="$name/.git" git-rev-parse --git-dir >/dev/null 2>&1 &&
 609                         echo "$name"
 610                 done
 611         )
 612
 613         test -z "$modules" && return
 614
 615         git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- $modules |
 616         sane_egrep '^:([0-7]* )?160000' |
 617         cut -c2- |
 618         while read mod_src mod_dst sha1_src sha1_dst status name
 619         do
 620                 if test -z "$cached" &&
 621                         test $sha1_dst = 0000000000000000000000000000000000000000
 622                 then
 623                         case "$mod_dst" in
 624                         160000)
 625                                 sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
 626                                 ;;
 627                         100644 | 100755 | 120000)
 628                                 sha1_dst=$(git hash-object $name)
 629                                 ;;
 630                         000000)
 631                                 ;; # removed
 632                         *)
 633                                 # unexpected type
 634                                 echo >&2 "unexpected mode $mod_dst"
 635                                 continue ;;
 636                         esac
 637                 fi
 638                 missing_src=
 639                 missing_dst=
 640
 641                 test $mod_src = 160000 &&
 642                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_src^0 >/dev/null &&
 643                 missing_src=t
 644
 645                 test $mod_dst = 160000 &&
 646                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_dst^0 >/dev/null &&
 647                 missing_dst=t
 648
 649                 total_commits=
 650                 case "$missing_src,$missing_dst" in
 651                 t,)
 652                         errmsg="  Warn: $name doesn't contain commit $sha1_src"
 653                         ;;
 654                 ,t)
 655                         errmsg="  Warn: $name doesn't contain commit $sha1_dst"
 656                         ;;
 657                 t,t)
 658                         errmsg="  Warn: $name doesn't contain commits $sha1_src and $sha1_dst"
 659                         ;;
 660                 *)
 661                         errmsg=
 662                         total_commits=$(
 663                         if test $mod_src = 160000 -a $mod_dst = 160000
 664                         then
 665                                 range="$sha1_src...$sha1_dst"
 666                         elif test $mod_src = 160000
 667                         then
 668                                 range=$sha1_src
 669                         else
 670                                 range=$sha1_dst
 671                         fi
 672                         GIT_DIR="$name/.git" \
 673                         git rev-list --first-parent $range -- | wc -l
 674                         )
 675                         total_commits=" ($(($total_commits + 0)))"
 676                         ;;
 677                 esac
 678
 679                 sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
 680                 sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
 681                 if test $status = T
 682                 then
 683                         if test $mod_dst = 160000
 684                         then
 685                                 echo "* $name $sha1_abbr_src(blob)->$sha1_abbr_dst(submodule)$total_commits:"
 686                         else
 687                                 echo "* $name $sha1_abbr_src(submodule)->$sha1_abbr_dst(blob)$total_commits:"
 688                         fi
 689                 else
 690                         echo "* $name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
 691                 fi
 692                 if test -n "$errmsg"
 693                 then
 694                         # Don't give error msg for modification whose dst is not submodule
 695                         # i.e. deleted or changed to blob
 696                         test $mod_dst = 160000 && echo "$errmsg"
 697                 else
 698                         if test $mod_src = 160000 -a $mod_dst = 160000
 699                         then
 700                                 limit=
 701                                 test $summary_limit -gt 0 && limit="-$summary_limit"
 702                                 GIT_DIR="$name/.git" \
 703                                 git log $limit --pretty='format:  %m %s' \
 704                                 --first-parent $sha1_src...$sha1_dst
 705                         elif test $mod_dst = 160000
 706                         then
 707                                 GIT_DIR="$name/.git" \
 708                                 git log --pretty='format:  > %s' -1 $sha1_dst
 709                         else
 710                                 GIT_DIR="$name/.git" \
 711                                 git log --pretty='format:  < %s' -1 $sha1_src
 712                         fi
 713                         echo
 714                 fi
 715                 echo
 716         done |
 717         if test -n "$for_status"; then
 718                 if [ -n "$files" ]; then
 719                         echo "# Submodules changed but not updated:"
 720                 else
 721                         echo "# Submodule changes to be committed:"
 722                 fi
 723                 echo "#"
 724                 sed -e 's|^|# |' -e 's|^# $|#|'
 725         else
 726                 cat
 727         fi
 728 }
 729 #
 730 # List all submodules, prefixed with:
 731 #  - submodule not initialized
 732 #  + different revision checked out
 733 #
 734 # If --cached was specified the revision in the index will be printed
 735 # instead of the currently checked out revision.
 736 #
 737 # $@ = requested paths (default to all)
 738 #
 739 cmd_status()
 740 {
 741         # parse $args after "submodule ... status".
 742         orig_flags=
 743         while test $# -ne 0
 744         do
 745                 case "$1" in
 746                 -q|--quiet)
 747                         GIT_QUIET=1
 748                         ;;
 749                 --cached)
 750                         cached=1
 751                         ;;
 752                 --recursive)
 753                         recursive=1
 754                         ;;
 755                 --)
 756                         shift
 757                         break
 758                         ;;
 759                 -*)
 760                         usage
 761                         ;;
 762                 *)
 763                         break
 764                         ;;
 765                 esac
 766                 orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 767                 shift
 768         done
 769
 770         module_list "$@" |
 771         while read mode sha1 stage path
 772         do
 773                 name=$(module_name "$path") || exit
 774                 url=$(git config submodule."$name".url)
 775                 displaypath="$prefix$path"
 776                 if test -z "$url" || ! test -d "$path"/.git -o -f "$path"/.git
 777                 then
 778                         say "-$sha1 $displaypath"
 779                         continue;
 780                 fi
 781                 set_name_rev "$path" "$sha1"
 782                 if git diff-files --ignore-submodules=dirty --quiet -- "$path"
 783                 then
 784                         say " $sha1 $displaypath$revname"
 785                 else
 786                         if test -z "$cached"
 787                         then
 788                                 sha1=$(clear_local_git_env; cd "$path" && git rev-parse --verify HEAD)
 789                                 set_name_rev "$path" "$sha1"
 790                         fi
 791                         say "+$sha1 $displaypath$revname"
 792                 fi
 793
 794                 if test -n "$recursive"
 795                 then
 796                         (
 797                                 prefix="$displaypath/"
 798                                 clear_local_git_env
 799                                 cd "$path" &&
 800                                 eval cmd_status "$orig_args"
 801                         ) ||
 802                         die "Failed to recurse into submodule path '$path'"
 803                 fi
 804         done
 805 }
 806 #
 807 # Sync remote urls for submodules
 808 # This makes the value for remote.$remote.url match the value
 809 # specified in .gitmodules.
 810 #
 811 cmd_sync()
 812 {
 813         while test $# -ne 0
 814         do
 815                 case "$1" in
 816                 -q|--quiet)
 817                         GIT_QUIET=1
 818                         shift
 819                         ;;
 820                 --)
 821                         shift
 822                         break
 823                         ;;
 824                 -*)
 825                         usage
 826                         ;;
 827                 *)
 828                         break
 829                         ;;
 830                 esac
 831         done
 832         cd_to_toplevel
 833         module_list "$@" |
 834         while read mode sha1 stage path
 835         do
 836                 name=$(module_name "$path")
 837                 url=$(git config -f .gitmodules --get submodule."$name".url)
 838
 839                 # Possibly a url relative to parent
 840                 case "$url" in
 841                 ./*|../*)
 842                         url=$(resolve_relative_url "$url") || exit
 843                         ;;
 844                 esac
 845
 846                 say "Synchronizing submodule url for '$name'"
 847                 git config submodule."$name".url "$url"
 848
 849                 if test -e "$path"/.git
 850                 then
 851                 (
 852                         clear_local_git_env
 853                         cd "$path"
 854                         remote=$(get_default_remote)
 855                         git config remote."$remote".url "$url"
 856                 )
 857                 fi
 858         done
 859 }
 860
 861 # This loop parses the command line arguments to find the
 862 # subcommand name to dispatch.  Parsing of the subcommand specific
 863 # options are primarily done by the subcommand implementations.
 864 # Subcommand specific options such as --branch and --cached are
 865 # parsed here as well, for backward compatibility.
 866
 867 while test $# != 0 && test -z "$command"
 868 do
 869         case "$1" in
 870         add | foreach | init | update | status | summary | sync)
 871                 command=$1
 872                 ;;
 873         -q|--quiet)
 874                 GIT_QUIET=1
 875                 ;;
 876         -b|--branch)
 877                 case "$2" in
 878                 '')
 879                         usage
 880                         ;;
 881                 esac
 882                 branch="$2"; shift
 883                 ;;
 884         --cached)
 885                 cached="$1"
 886                 ;;
 887         --)
 888                 break
 889                 ;;
 890         -*)
 891                 usage
 892                 ;;
 893         *)
 894                 break
 895                 ;;
 896         esac
 897         shift
 898 done
 899
 900 # No command word defaults to "status"
 901 test -n "$command" || command=status
 902
 903 # "-b branch" is accepted only by "add"
 904 if test -n "$branch" && test "$command" != add
 905 then
 906         usage
 907 fi
 908
 909 # "--cached" is accepted only by "status" and "summary"
 910 if test -n "$cached" && test "$command" != status -a "$command" != summary
 911 then
 912         usage
 913 fi
 914
 915 "cmd_$command" "$@"