git.oblomov.eu Git - git/blob - 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] [-f|--force] [--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                 -f|--force)
 389                         force=$1
 390                         ;;
 391                 -r|--rebase)
 392                         update="rebase"
 393                         ;;
 394                 --reference)
 395                         case "$2" in '') usage ;; esac
 396                         reference="--reference=$2"
 397                         orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 398                         shift
 399                         ;;
 400                 --reference=*)
 401                         reference="$1"
 402                         ;;
 403                 -m|--merge)
 404                         update="merge"
 405                         ;;
 406                 --recursive)
 407                         recursive=1
 408                         ;;
 409                 --)
 410                         shift
 411                         break
 412                         ;;
 413                 -*)
 414                         usage
 415                         ;;
 416                 *)
 417                         break
 418                         ;;
 419                 esac
 420                 orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 421                 shift
 422         done
 423
 424         if test -n "$init"
 425         then
 426                 cmd_init "--" "$@" || return
 427         fi
 428
 429         cloned_modules=
 430         module_list "$@" |
 431         while read mode sha1 stage path
 432         do
 433                 name=$(module_name "$path") || exit
 434                 url=$(git config submodule."$name".url)
 435                 update_module=$(git config submodule."$name".update)
 436                 if test -z "$url"
 437                 then
 438                         # Only mention uninitialized submodules when its
 439                         # path have been specified
 440                         test "$#" != "0" &&
 441                         say "Submodule path '$path' not initialized" &&
 442                         say "Maybe you want to use 'update --init'?"
 443                         continue
 444                 fi
 445
 446                 if ! test -d "$path"/.git -o -f "$path"/.git
 447                 then
 448                         module_clone "$path" "$url" "$reference"|| exit
 449                         cloned_modules="$cloned_modules;$name"
 450                         subsha1=
 451                 else
 452                         subsha1=$(clear_local_git_env; cd "$path" &&
 453                                 git rev-parse --verify HEAD) ||
 454                         die "Unable to find current revision in submodule path '$path'"
 455                 fi
 456
 457                 if ! test -z "$update"
 458                 then
 459                         update_module=$update
 460                 fi
 461
 462                 if test "$subsha1" != "$sha1"
 463                 then
 464                         subforce=$force
 465                         # If we don't already have a -f flag and the submodule has never been checked out
 466                         if test -z "$subsha1" -a -z "$force"
 467                         then
 468                                 subforce="-f"
 469                         fi
 470
 471                         if test -z "$nofetch"
 472                         then
 473                                 (clear_local_git_env; cd "$path" &&
 474                                         git-fetch) ||
 475                                 die "Unable to fetch in submodule path '$path'"
 476                         fi
 477
 478                         # Is this something we just cloned?
 479                         case ";$cloned_modules;" in
 480                         *";$name;"*)
 481                                 # then there is no local change to integrate
 482                                 update_module= ;;
 483                         esac
 484
 485                         case "$update_module" in
 486                         rebase)
 487                                 command="git rebase"
 488                                 action="rebase"
 489                                 msg="rebased onto"
 490                                 ;;
 491                         merge)
 492                                 command="git merge"
 493                                 action="merge"
 494                                 msg="merged in"
 495                                 ;;
 496                         *)
 497                                 command="git checkout $subforce -q"
 498                                 action="checkout"
 499                                 msg="checked out"
 500                                 ;;
 501                         esac
 502
 503                         (clear_local_git_env; cd "$path" && $command "$sha1") ||
 504                         die "Unable to $action '$sha1' in submodule path '$path'"
 505                         say "Submodule path '$path': $msg '$sha1'"
 506                 fi
 507
 508                 if test -n "$recursive"
 509                 then
 510                         (clear_local_git_env; cd "$path" && eval cmd_update "$orig_flags") ||
 511                         die "Failed to recurse into submodule path '$path'"
 512                 fi
 513         done
 514 }
 515
 516 set_name_rev () {
 517         revname=$( (
 518                 clear_local_git_env
 519                 cd "$1" && {
 520                         git describe "$2" 2>/dev/null ||
 521                         git describe --tags "$2" 2>/dev/null ||
 522                         git describe --contains "$2" 2>/dev/null ||
 523                         git describe --all --always "$2"
 524                 }
 525         ) )
 526         test -z "$revname" || revname=" ($revname)"
 527 }
 528 #
 529 # Show commit summary for submodules in index or working tree
 530 #
 531 # If '--cached' is given, show summary between index and given commit,
 532 # or between working tree and given commit
 533 #
 534 # $@ = [commit (default 'HEAD'),] requested paths (default all)
 535 #
 536 cmd_summary() {
 537         summary_limit=-1
 538         for_status=
 539         diff_cmd=diff-index
 540
 541         # parse $args after "submodule ... summary".
 542         while test $# -ne 0
 543         do
 544                 case "$1" in
 545                 --cached)
 546                         cached="$1"
 547                         ;;
 548                 --files)
 549                         files="$1"
 550                         ;;
 551                 --for-status)
 552                         for_status="$1"
 553                         ;;
 554                 -n|--summary-limit)
 555                         if summary_limit=$(($2 + 0)) 2>/dev/null && test "$summary_limit" = "$2"
 556                         then
 557                                 :
 558                         else
 559                                 usage
 560                         fi
 561                         shift
 562                         ;;
 563                 --)
 564                         shift
 565                         break
 566                         ;;
 567                 -*)
 568                         usage
 569                         ;;
 570                 *)
 571                         break
 572                         ;;
 573                 esac
 574                 shift
 575         done
 576
 577         test $summary_limit = 0 && return
 578
 579         if rev=$(git rev-parse -q --verify --default HEAD ${1+"$1"})
 580         then
 581                 head=$rev
 582                 test $# = 0 || shift
 583         elif test -z "$1" -o "$1" = "HEAD"
 584         then
 585                 # before the first commit: compare with an empty tree
 586                 head=$(git hash-object -w -t tree --stdin </dev/null)
 587                 test -z "$1" || shift
 588         else
 589                 head="HEAD"
 590         fi
 591
 592         if [ -n "$files" ]
 593         then
 594                 test -n "$cached" &&
 595                 die "--cached cannot be used with --files"
 596                 diff_cmd=diff-files
 597                 head=
 598         fi
 599
 600         cd_to_toplevel
 601         # Get modified modules cared by user
 602         modules=$(git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- "$@" |
 603                 sane_egrep '^:([0-7]* )?160000' |
 604                 while read mod_src mod_dst sha1_src sha1_dst status name
 605                 do
 606                         # Always show modules deleted or type-changed (blob<->module)
 607                         test $status = D -o $status = T && echo "$name" && continue
 608                         # Also show added or modified modules which are checked out
 609                         GIT_DIR="$name/.git" git-rev-parse --git-dir >/dev/null 2>&1 &&
 610                         echo "$name"
 611                 done
 612         )
 613
 614         test -z "$modules" && return
 615
 616         git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- $modules |
 617         sane_egrep '^:([0-7]* )?160000' |
 618         cut -c2- |
 619         while read mod_src mod_dst sha1_src sha1_dst status name
 620         do
 621                 if test -z "$cached" &&
 622                         test $sha1_dst = 0000000000000000000000000000000000000000
 623                 then
 624                         case "$mod_dst" in
 625                         160000)
 626                                 sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
 627                                 ;;
 628                         100644 | 100755 | 120000)
 629                                 sha1_dst=$(git hash-object $name)
 630                                 ;;
 631                         000000)
 632                                 ;; # removed
 633                         *)
 634                                 # unexpected type
 635                                 echo >&2 "unexpected mode $mod_dst"
 636                                 continue ;;
 637                         esac
 638                 fi
 639                 missing_src=
 640                 missing_dst=
 641
 642                 test $mod_src = 160000 &&
 643                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_src^0 >/dev/null &&
 644                 missing_src=t
 645
 646                 test $mod_dst = 160000 &&
 647                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_dst^0 >/dev/null &&
 648                 missing_dst=t
 649
 650                 total_commits=
 651                 case "$missing_src,$missing_dst" in
 652                 t,)
 653                         errmsg="  Warn: $name doesn't contain commit $sha1_src"
 654                         ;;
 655                 ,t)
 656                         errmsg="  Warn: $name doesn't contain commit $sha1_dst"
 657                         ;;
 658                 t,t)
 659                         errmsg="  Warn: $name doesn't contain commits $sha1_src and $sha1_dst"
 660                         ;;
 661                 *)
 662                         errmsg=
 663                         total_commits=$(
 664                         if test $mod_src = 160000 -a $mod_dst = 160000
 665                         then
 666                                 range="$sha1_src...$sha1_dst"
 667                         elif test $mod_src = 160000
 668                         then
 669                                 range=$sha1_src
 670                         else
 671                                 range=$sha1_dst
 672                         fi
 673                         GIT_DIR="$name/.git" \
 674                         git rev-list --first-parent $range -- | wc -l
 675                         )
 676                         total_commits=" ($(($total_commits + 0)))"
 677                         ;;
 678                 esac
 679
 680                 sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
 681                 sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
 682                 if test $status = T
 683                 then
 684                         if test $mod_dst = 160000
 685                         then
 686                                 echo "* $name $sha1_abbr_src(blob)->$sha1_abbr_dst(submodule)$total_commits:"
 687                         else
 688                                 echo "* $name $sha1_abbr_src(submodule)->$sha1_abbr_dst(blob)$total_commits:"
 689                         fi
 690                 else
 691                         echo "* $name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
 692                 fi
 693                 if test -n "$errmsg"
 694                 then
 695                         # Don't give error msg for modification whose dst is not submodule
 696                         # i.e. deleted or changed to blob
 697                         test $mod_dst = 160000 && echo "$errmsg"
 698                 else
 699                         if test $mod_src = 160000 -a $mod_dst = 160000
 700                         then
 701                                 limit=
 702                                 test $summary_limit -gt 0 && limit="-$summary_limit"
 703                                 GIT_DIR="$name/.git" \
 704                                 git log $limit --pretty='format:  %m %s' \
 705                                 --first-parent $sha1_src...$sha1_dst
 706                         elif test $mod_dst = 160000
 707                         then
 708                                 GIT_DIR="$name/.git" \
 709                                 git log --pretty='format:  > %s' -1 $sha1_dst
 710                         else
 711                                 GIT_DIR="$name/.git" \
 712                                 git log --pretty='format:  < %s' -1 $sha1_src
 713                         fi
 714                         echo
 715                 fi
 716                 echo
 717         done |
 718         if test -n "$for_status"; then
 719                 if [ -n "$files" ]; then
 720                         echo "# Submodules changed but not updated:"
 721                 else
 722                         echo "# Submodule changes to be committed:"
 723                 fi
 724                 echo "#"
 725                 sed -e 's|^|# |' -e 's|^# $|#|'
 726         else
 727                 cat
 728         fi
 729 }
 730 #
 731 # List all submodules, prefixed with:
 732 #  - submodule not initialized
 733 #  + different revision checked out
 734 #
 735 # If --cached was specified the revision in the index will be printed
 736 # instead of the currently checked out revision.
 737 #
 738 # $@ = requested paths (default to all)
 739 #
 740 cmd_status()
 741 {
 742         # parse $args after "submodule ... status".
 743         orig_flags=
 744         while test $# -ne 0
 745         do
 746                 case "$1" in
 747                 -q|--quiet)
 748                         GIT_QUIET=1
 749                         ;;
 750                 --cached)
 751                         cached=1
 752                         ;;
 753                 --recursive)
 754                         recursive=1
 755                         ;;
 756                 --)
 757                         shift
 758                         break
 759                         ;;
 760                 -*)
 761                         usage
 762                         ;;
 763                 *)
 764                         break
 765                         ;;
 766                 esac
 767                 orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 768                 shift
 769         done
 770
 771         module_list "$@" |
 772         while read mode sha1 stage path
 773         do
 774                 name=$(module_name "$path") || exit
 775                 url=$(git config submodule."$name".url)
 776                 displaypath="$prefix$path"
 777                 if test -z "$url" || ! test -d "$path"/.git -o -f "$path"/.git
 778                 then
 779                         say "-$sha1 $displaypath"
 780                         continue;
 781                 fi
 782                 set_name_rev "$path" "$sha1"
 783                 if git diff-files --ignore-submodules=dirty --quiet -- "$path"
 784                 then
 785                         say " $sha1 $displaypath$revname"
 786                 else
 787                         if test -z "$cached"
 788                         then
 789                                 sha1=$(clear_local_git_env; cd "$path" && git rev-parse --verify HEAD)
 790                                 set_name_rev "$path" "$sha1"
 791                         fi
 792                         say "+$sha1 $displaypath$revname"
 793                 fi
 794
 795                 if test -n "$recursive"
 796                 then
 797                         (
 798                                 prefix="$displaypath/"
 799                                 clear_local_git_env
 800                                 cd "$path" &&
 801                                 eval cmd_status "$orig_args"
 802                         ) ||
 803                         die "Failed to recurse into submodule path '$path'"
 804                 fi
 805         done
 806 }
 807 #
 808 # Sync remote urls for submodules
 809 # This makes the value for remote.$remote.url match the value
 810 # specified in .gitmodules.
 811 #
 812 cmd_sync()
 813 {
 814         while test $# -ne 0
 815         do
 816                 case "$1" in
 817                 -q|--quiet)
 818                         GIT_QUIET=1
 819                         shift
 820                         ;;
 821                 --)
 822                         shift
 823                         break
 824                         ;;
 825                 -*)
 826                         usage
 827                         ;;
 828                 *)
 829                         break
 830                         ;;
 831                 esac
 832         done
 833         cd_to_toplevel
 834         module_list "$@" |
 835         while read mode sha1 stage path
 836         do
 837                 name=$(module_name "$path")
 838                 url=$(git config -f .gitmodules --get submodule."$name".url)
 839
 840                 # Possibly a url relative to parent
 841                 case "$url" in
 842                 ./*|../*)
 843                         url=$(resolve_relative_url "$url") || exit
 844                         ;;
 845                 esac
 846
 847                 say "Synchronizing submodule url for '$name'"
 848                 git config submodule."$name".url "$url"
 849
 850                 if test -e "$path"/.git
 851                 then
 852                 (
 853                         clear_local_git_env
 854                         cd "$path"
 855                         remote=$(get_default_remote)
 856                         git config remote."$remote".url "$url"
 857                 )
 858                 fi
 859         done
 860 }
 861
 862 # This loop parses the command line arguments to find the
 863 # subcommand name to dispatch.  Parsing of the subcommand specific
 864 # options are primarily done by the subcommand implementations.
 865 # Subcommand specific options such as --branch and --cached are
 866 # parsed here as well, for backward compatibility.
 867
 868 while test $# != 0 && test -z "$command"
 869 do
 870         case "$1" in
 871         add | foreach | init | update | status | summary | sync)
 872                 command=$1
 873                 ;;
 874         -q|--quiet)
 875                 GIT_QUIET=1
 876                 ;;
 877         -b|--branch)
 878                 case "$2" in
 879                 '')
 880                         usage
 881                         ;;
 882                 esac
 883                 branch="$2"; shift
 884                 ;;
 885         --cached)
 886                 cached="$1"
 887                 ;;
 888         --)
 889                 break
 890                 ;;
 891         -*)
 892                 usage
 893                 ;;
 894         *)
 895                 break
 896                 ;;
 897         esac
 898         shift
 899 done
 900
 901 # No command word defaults to "status"
 902 test -n "$command" || command=status
 903
 904 # "-b branch" is accepted only by "add"
 905 if test -n "$branch" && test "$command" != add
 906 then
 907         usage
 908 fi
 909
 910 # "--cached" is accepted only by "status" and "summary"
 911 if test -n "$cached" && test "$command" != status -a "$command" != summary
 912 then
 913         usage
 914 fi
 915
 916 "cmd_$command" "$@"