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 # $@ = path to limit submodule list
  72 #
  73 module_list()
  74 {
  75         git ls-files --error-unmatch --stage -- "$@" |
  76         perl -e '
  77         my %unmerged = ();
  78         my ($null_sha1) = ("0" x 40);
  79         while (<STDIN>) {
  80                 chomp;
  81                 my ($mode, $sha1, $stage, $path) =
  82                         /^([0-7]+) ([0-9a-f]{40}) ([0-3])\t(.*)$/;
  83                 next unless $mode eq "160000";
  84                 if ($stage ne "0") {
  85                         if (!$unmerged{$path}++) {
  86                                 print "$mode $null_sha1 U\t$path\n";
  87                         }
  88                         next;
  89                 }
  90                 print "$_\n";
  91         }
  92         '
  93 }
  94
  95 #
  96 # Map submodule path to submodule name
  97 #
  98 # $1 = path
  99 #
 100 module_name()
 101 {
 102         # Do we have "submodule.<something>.path = $1" defined in .gitmodules file?
 103         re=$(printf '%s\n' "$1" | sed -e 's/[].[^$\\*]/\\&/g')
 104         name=$( git config -f .gitmodules --get-regexp '^submodule\..*\.path$' |
 105                 sed -n -e 's|^submodule\.\(.*\)\.path '"$re"'$|\1|p' )
 106        test -z "$name" &&
 107        die "No submodule mapping found in .gitmodules for path '$path'"
 108        echo "$name"
 109 }
 110
 111 #
 112 # Clone a submodule
 113 #
 114 # Prior to calling, cmd_update checks that a possibly existing
 115 # path is not a git repository.
 116 # Likewise, cmd_add checks that path does not exist at all,
 117 # since it is the location of a new submodule.
 118 #
 119 module_clone()
 120 {
 121         path=$1
 122         url=$2
 123         reference="$3"
 124
 125         if test -n "$reference"
 126         then
 127                 git-clone "$reference" -n "$url" "$path"
 128         else
 129                 git-clone -n "$url" "$path"
 130         fi ||
 131         die "Clone of '$url' into submodule path '$path' failed"
 132 }
 133
 134 #
 135 # Add a new submodule to the working tree, .gitmodules and the index
 136 #
 137 # $@ = repo path
 138 #
 139 # optional branch is stored in global branch variable
 140 #
 141 cmd_add()
 142 {
 143         # parse $args after "submodule ... add".
 144         while test $# -ne 0
 145         do
 146                 case "$1" in
 147                 -b | --branch)
 148                         case "$2" in '') usage ;; esac
 149                         branch=$2
 150                         shift
 151                         ;;
 152                 -f | --force)
 153                         force=$1
 154                         ;;
 155                 -q|--quiet)
 156                         GIT_QUIET=1
 157                         ;;
 158                 --reference)
 159                         case "$2" in '') usage ;; esac
 160                         reference="--reference=$2"
 161                         shift
 162                         ;;
 163                 --reference=*)
 164                         reference="$1"
 165                         shift
 166                         ;;
 167                 --)
 168                         shift
 169                         break
 170                         ;;
 171                 -*)
 172                         usage
 173                         ;;
 174                 *)
 175                         break
 176                         ;;
 177                 esac
 178                 shift
 179         done
 180
 181         repo=$1
 182         path=$2
 183
 184         if test -z "$path"; then
 185                 path=$(echo "$repo" |
 186                         sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
 187         fi
 188
 189         if test -z "$repo" -o -z "$path"; then
 190                 usage
 191         fi
 192
 193         # assure repo is absolute or relative to parent
 194         case "$repo" in
 195         ./*|../*)
 196                 # dereference source url relative to parent's url
 197                 realrepo=$(resolve_relative_url "$repo") || exit
 198                 ;;
 199         *:*|/*)
 200                 # absolute url
 201                 realrepo=$repo
 202                 ;;
 203         *)
 204                 die "repo URL: '$repo' must be absolute or begin with ./|../"
 205         ;;
 206         esac
 207
 208         # normalize path:
 209         # multiple //; leading ./; /./; /../; trailing /
 210         path=$(printf '%s/\n' "$path" |
 211                 sed -e '
 212                         s|//*|/|g
 213                         s|^\(\./\)*||
 214                         s|/\./|/|g
 215                         :start
 216                         s|\([^/]*\)/\.\./||
 217                         tstart
 218                         s|/*$||
 219                 ')
 220         git ls-files --error-unmatch "$path" > /dev/null 2>&1 &&
 221         die "'$path' already exists in the index"
 222
 223         if test -z "$force" && ! git add --dry-run --ignore-missing "$path" > /dev/null 2>&1
 224         then
 225                 echo >&2 "The following path is ignored by one of your .gitignore files:" &&
 226                 echo >&2 $path &&
 227                 echo >&2 "Use -f if you really want to add it."
 228                 exit 1
 229         fi
 230
 231         # perhaps the path exists and is already a git repo, else clone it
 232         if test -e "$path"
 233         then
 234                 if test -d "$path"/.git -o -f "$path"/.git
 235                 then
 236                         echo "Adding existing repo at '$path' to the index"
 237                 else
 238                         die "'$path' already exists and is not a valid git repo"
 239                 fi
 240
 241                 case "$repo" in
 242                 ./*|../*)
 243                         url=$(resolve_relative_url "$repo") || exit
 244                     ;;
 245                 *)
 246                         url="$repo"
 247                         ;;
 248                 esac
 249                 git config submodule."$path".url "$url"
 250         else
 251
 252                 module_clone "$path" "$realrepo" "$reference" || exit
 253                 (
 254                         clear_local_git_env
 255                         cd "$path" &&
 256                         # ash fails to wordsplit ${branch:+-b "$branch"...}
 257                         case "$branch" in
 258                         '') git checkout -f -q ;;
 259                         ?*) git checkout -f -q -B "$branch" "origin/$branch" ;;
 260                         esac
 261                 ) || die "Unable to checkout submodule '$path'"
 262         fi
 263
 264         git add $force "$path" ||
 265         die "Failed to add submodule '$path'"
 266
 267         git config -f .gitmodules submodule."$path".path "$path" &&
 268         git config -f .gitmodules submodule."$path".url "$repo" &&
 269         git add --force .gitmodules ||
 270         die "Failed to register submodule '$path'"
 271 }
 272
 273 #
 274 # Execute an arbitrary command sequence in each checked out
 275 # submodule
 276 #
 277 # $@ = command to execute
 278 #
 279 cmd_foreach()
 280 {
 281         # parse $args after "submodule ... foreach".
 282         while test $# -ne 0
 283         do
 284                 case "$1" in
 285                 -q|--quiet)
 286                         GIT_QUIET=1
 287                         ;;
 288                 --recursive)
 289                         recursive=1
 290                         ;;
 291                 -*)
 292                         usage
 293                         ;;
 294                 *)
 295                         break
 296                         ;;
 297                 esac
 298                 shift
 299         done
 300
 301         toplevel=$(pwd)
 302
 303         module_list |
 304         while read mode sha1 stage path
 305         do
 306                 if test -e "$path"/.git
 307                 then
 308                         say "Entering '$prefix$path'"
 309                         name=$(module_name "$path")
 310                         (
 311                                 prefix="$prefix$path/"
 312                                 clear_local_git_env
 313                                 cd "$path" &&
 314                                 eval "$@" &&
 315                                 if test -n "$recursive"
 316                                 then
 317                                         cmd_foreach "--recursive" "$@"
 318                                 fi
 319                         ) ||
 320                         die "Stopping at '$path'; script returned non-zero status."
 321                 fi
 322         done
 323 }
 324
 325 #
 326 # Register submodules in .git/config
 327 #
 328 # $@ = requested paths (default to all)
 329 #
 330 cmd_init()
 331 {
 332         # parse $args after "submodule ... init".
 333         while test $# -ne 0
 334         do
 335                 case "$1" in
 336                 -q|--quiet)
 337                         GIT_QUIET=1
 338                         ;;
 339                 --)
 340                         shift
 341                         break
 342                         ;;
 343                 -*)
 344                         usage
 345                         ;;
 346                 *)
 347                         break
 348                         ;;
 349                 esac
 350                 shift
 351         done
 352
 353         module_list "$@" |
 354         while read mode sha1 stage path
 355         do
 356                 # Skip already registered paths
 357                 name=$(module_name "$path") || exit
 358                 url=$(git config submodule."$name".url)
 359                 test -z "$url" || continue
 360
 361                 url=$(git config -f .gitmodules submodule."$name".url)
 362                 test -z "$url" &&
 363                 die "No url found for submodule path '$path' in .gitmodules"
 364
 365                 # Possibly a url relative to parent
 366                 case "$url" in
 367                 ./*|../*)
 368                         url=$(resolve_relative_url "$url") || exit
 369                         ;;
 370                 esac
 371
 372                 git config submodule."$name".url "$url" ||
 373                 die "Failed to register url for submodule path '$path'"
 374
 375                 upd="$(git config -f .gitmodules submodule."$name".update)"
 376                 test -z "$upd" ||
 377                 git config submodule."$name".update "$upd" ||
 378                 die "Failed to register update mode for submodule path '$path'"
 379
 380                 say "Submodule '$name' ($url) registered for path '$path'"
 381         done
 382 }
 383
 384 #
 385 # Update each submodule path to correct revision, using clone and checkout as needed
 386 #
 387 # $@ = requested paths (default to all)
 388 #
 389 cmd_update()
 390 {
 391         # parse $args after "submodule ... update".
 392         orig_flags=
 393         while test $# -ne 0
 394         do
 395                 case "$1" in
 396                 -q|--quiet)
 397                         GIT_QUIET=1
 398                         ;;
 399                 -i|--init)
 400                         init=1
 401                         ;;
 402                 -N|--no-fetch)
 403                         nofetch=1
 404                         ;;
 405                 -r|--rebase)
 406                         update="rebase"
 407                         ;;
 408                 --reference)
 409                         case "$2" in '') usage ;; esac
 410                         reference="--reference=$2"
 411                         orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 412                         shift
 413                         ;;
 414                 --reference=*)
 415                         reference="$1"
 416                         ;;
 417                 -m|--merge)
 418                         update="merge"
 419                         ;;
 420                 --recursive)
 421                         recursive=1
 422                         ;;
 423                 --)
 424                         shift
 425                         break
 426                         ;;
 427                 -*)
 428                         usage
 429                         ;;
 430                 *)
 431                         break
 432                         ;;
 433                 esac
 434                 orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 435                 shift
 436         done
 437
 438         if test -n "$init"
 439         then
 440                 cmd_init "--" "$@" || return
 441         fi
 442
 443         cloned_modules=
 444         module_list "$@" |
 445         while read mode sha1 stage path
 446         do
 447                 if test "$stage" = U
 448                 then
 449                         echo >&2 "Skipping unmerged submodule $path"
 450                         continue
 451                 fi
 452                 name=$(module_name "$path") || exit
 453                 url=$(git config submodule."$name".url)
 454                 update_module=$(git config submodule."$name".update)
 455                 if test -z "$url"
 456                 then
 457                         # Only mention uninitialized submodules when its
 458                         # path have been specified
 459                         test "$#" != "0" &&
 460                         say "Submodule path '$path' not initialized" &&
 461                         say "Maybe you want to use 'update --init'?"
 462                         continue
 463                 fi
 464
 465                 if ! test -d "$path"/.git -o -f "$path"/.git
 466                 then
 467                         module_clone "$path" "$url" "$reference"|| exit
 468                         cloned_modules="$cloned_modules;$name"
 469                         subsha1=
 470                 else
 471                         subsha1=$(clear_local_git_env; cd "$path" &&
 472                                 git rev-parse --verify HEAD) ||
 473                         die "Unable to find current revision in submodule path '$path'"
 474                 fi
 475
 476                 if ! test -z "$update"
 477                 then
 478                         update_module=$update
 479                 fi
 480
 481                 if test "$subsha1" != "$sha1"
 482                 then
 483                         force=
 484                         if test -z "$subsha1"
 485                         then
 486                                 force="-f"
 487                         fi
 488
 489                         if test -z "$nofetch"
 490                         then
 491                                 (clear_local_git_env; cd "$path" &&
 492                                         git-fetch) ||
 493                                 die "Unable to fetch in submodule path '$path'"
 494                         fi
 495
 496                         # Is this something we just cloned?
 497                         case ";$cloned_modules;" in
 498                         *";$name;"*)
 499                                 # then there is no local change to integrate
 500                                 update_module= ;;
 501                         esac
 502
 503                         case "$update_module" in
 504                         rebase)
 505                                 command="git rebase"
 506                                 action="rebase"
 507                                 msg="rebased onto"
 508                                 ;;
 509                         merge)
 510                                 command="git merge"
 511                                 action="merge"
 512                                 msg="merged in"
 513                                 ;;
 514                         *)
 515                                 command="git checkout $force -q"
 516                                 action="checkout"
 517                                 msg="checked out"
 518                                 ;;
 519                         esac
 520
 521                         (clear_local_git_env; cd "$path" && $command "$sha1") ||
 522                         die "Unable to $action '$sha1' in submodule path '$path'"
 523                         say "Submodule path '$path': $msg '$sha1'"
 524                 fi
 525
 526                 if test -n "$recursive"
 527                 then
 528                         (clear_local_git_env; cd "$path" && eval cmd_update "$orig_flags") ||
 529                         die "Failed to recurse into submodule path '$path'"
 530                 fi
 531         done
 532 }
 533
 534 set_name_rev () {
 535         revname=$( (
 536                 clear_local_git_env
 537                 cd "$1" && {
 538                         git describe "$2" 2>/dev/null ||
 539                         git describe --tags "$2" 2>/dev/null ||
 540                         git describe --contains "$2" 2>/dev/null ||
 541                         git describe --all --always "$2"
 542                 }
 543         ) )
 544         test -z "$revname" || revname=" ($revname)"
 545 }
 546 #
 547 # Show commit summary for submodules in index or working tree
 548 #
 549 # If '--cached' is given, show summary between index and given commit,
 550 # or between working tree and given commit
 551 #
 552 # $@ = [commit (default 'HEAD'),] requested paths (default all)
 553 #
 554 cmd_summary() {
 555         summary_limit=-1
 556         for_status=
 557         diff_cmd=diff-index
 558
 559         # parse $args after "submodule ... summary".
 560         while test $# -ne 0
 561         do
 562                 case "$1" in
 563                 --cached)
 564                         cached="$1"
 565                         ;;
 566                 --files)
 567                         files="$1"
 568                         ;;
 569                 --for-status)
 570                         for_status="$1"
 571                         ;;
 572                 -n|--summary-limit)
 573                         if summary_limit=$(($2 + 0)) 2>/dev/null && test "$summary_limit" = "$2"
 574                         then
 575                                 :
 576                         else
 577                                 usage
 578                         fi
 579                         shift
 580                         ;;
 581                 --)
 582                         shift
 583                         break
 584                         ;;
 585                 -*)
 586                         usage
 587                         ;;
 588                 *)
 589                         break
 590                         ;;
 591                 esac
 592                 shift
 593         done
 594
 595         test $summary_limit = 0 && return
 596
 597         if rev=$(git rev-parse -q --verify --default HEAD ${1+"$1"})
 598         then
 599                 head=$rev
 600                 test $# = 0 || shift
 601         elif test -z "$1" -o "$1" = "HEAD"
 602         then
 603                 # before the first commit: compare with an empty tree
 604                 head=$(git hash-object -w -t tree --stdin </dev/null)
 605                 test -z "$1" || shift
 606         else
 607                 head="HEAD"
 608         fi
 609
 610         if [ -n "$files" ]
 611         then
 612                 test -n "$cached" &&
 613                 die "--cached cannot be used with --files"
 614                 diff_cmd=diff-files
 615                 head=
 616         fi
 617
 618         cd_to_toplevel
 619         # Get modified modules cared by user
 620         modules=$(git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- "$@" |
 621                 sane_egrep '^:([0-7]* )?160000' |
 622                 while read mod_src mod_dst sha1_src sha1_dst status name
 623                 do
 624                         # Always show modules deleted or type-changed (blob<->module)
 625                         test $status = D -o $status = T && echo "$name" && continue
 626                         # Also show added or modified modules which are checked out
 627                         GIT_DIR="$name/.git" git-rev-parse --git-dir >/dev/null 2>&1 &&
 628                         echo "$name"
 629                 done
 630         )
 631
 632         test -z "$modules" && return
 633
 634         git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- $modules |
 635         sane_egrep '^:([0-7]* )?160000' |
 636         cut -c2- |
 637         while read mod_src mod_dst sha1_src sha1_dst status name
 638         do
 639                 if test -z "$cached" &&
 640                         test $sha1_dst = 0000000000000000000000000000000000000000
 641                 then
 642                         case "$mod_dst" in
 643                         160000)
 644                                 sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
 645                                 ;;
 646                         100644 | 100755 | 120000)
 647                                 sha1_dst=$(git hash-object $name)
 648                                 ;;
 649                         000000)
 650                                 ;; # removed
 651                         *)
 652                                 # unexpected type
 653                                 echo >&2 "unexpected mode $mod_dst"
 654                                 continue ;;
 655                         esac
 656                 fi
 657                 missing_src=
 658                 missing_dst=
 659
 660                 test $mod_src = 160000 &&
 661                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_src^0 >/dev/null &&
 662                 missing_src=t
 663
 664                 test $mod_dst = 160000 &&
 665                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_dst^0 >/dev/null &&
 666                 missing_dst=t
 667
 668                 total_commits=
 669                 case "$missing_src,$missing_dst" in
 670                 t,)
 671                         errmsg="  Warn: $name doesn't contain commit $sha1_src"
 672                         ;;
 673                 ,t)
 674                         errmsg="  Warn: $name doesn't contain commit $sha1_dst"
 675                         ;;
 676                 t,t)
 677                         errmsg="  Warn: $name doesn't contain commits $sha1_src and $sha1_dst"
 678                         ;;
 679                 *)
 680                         errmsg=
 681                         total_commits=$(
 682                         if test $mod_src = 160000 -a $mod_dst = 160000
 683                         then
 684                                 range="$sha1_src...$sha1_dst"
 685                         elif test $mod_src = 160000
 686                         then
 687                                 range=$sha1_src
 688                         else
 689                                 range=$sha1_dst
 690                         fi
 691                         GIT_DIR="$name/.git" \
 692                         git rev-list --first-parent $range -- | wc -l
 693                         )
 694                         total_commits=" ($(($total_commits + 0)))"
 695                         ;;
 696                 esac
 697
 698                 sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
 699                 sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
 700                 if test $status = T
 701                 then
 702                         if test $mod_dst = 160000
 703                         then
 704                                 echo "* $name $sha1_abbr_src(blob)->$sha1_abbr_dst(submodule)$total_commits:"
 705                         else
 706                                 echo "* $name $sha1_abbr_src(submodule)->$sha1_abbr_dst(blob)$total_commits:"
 707                         fi
 708                 else
 709                         echo "* $name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
 710                 fi
 711                 if test -n "$errmsg"
 712                 then
 713                         # Don't give error msg for modification whose dst is not submodule
 714                         # i.e. deleted or changed to blob
 715                         test $mod_dst = 160000 && echo "$errmsg"
 716                 else
 717                         if test $mod_src = 160000 -a $mod_dst = 160000
 718                         then
 719                                 limit=
 720                                 test $summary_limit -gt 0 && limit="-$summary_limit"
 721                                 GIT_DIR="$name/.git" \
 722                                 git log $limit --pretty='format:  %m %s' \
 723                                 --first-parent $sha1_src...$sha1_dst
 724                         elif test $mod_dst = 160000
 725                         then
 726                                 GIT_DIR="$name/.git" \
 727                                 git log --pretty='format:  > %s' -1 $sha1_dst
 728                         else
 729                                 GIT_DIR="$name/.git" \
 730                                 git log --pretty='format:  < %s' -1 $sha1_src
 731                         fi
 732                         echo
 733                 fi
 734                 echo
 735         done |
 736         if test -n "$for_status"; then
 737                 if [ -n "$files" ]; then
 738                         echo "# Submodules changed but not updated:"
 739                 else
 740                         echo "# Submodule changes to be committed:"
 741                 fi
 742                 echo "#"
 743                 sed -e 's|^|# |' -e 's|^# $|#|'
 744         else
 745                 cat
 746         fi
 747 }
 748 #
 749 # List all submodules, prefixed with:
 750 #  - submodule not initialized
 751 #  + different revision checked out
 752 #
 753 # If --cached was specified the revision in the index will be printed
 754 # instead of the currently checked out revision.
 755 #
 756 # $@ = requested paths (default to all)
 757 #
 758 cmd_status()
 759 {
 760         # parse $args after "submodule ... status".
 761         orig_flags=
 762         while test $# -ne 0
 763         do
 764                 case "$1" in
 765                 -q|--quiet)
 766                         GIT_QUIET=1
 767                         ;;
 768                 --cached)
 769                         cached=1
 770                         ;;
 771                 --recursive)
 772                         recursive=1
 773                         ;;
 774                 --)
 775                         shift
 776                         break
 777                         ;;
 778                 -*)
 779                         usage
 780                         ;;
 781                 *)
 782                         break
 783                         ;;
 784                 esac
 785                 orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 786                 shift
 787         done
 788
 789         module_list "$@" |
 790         while read mode sha1 stage path
 791         do
 792                 name=$(module_name "$path") || exit
 793                 url=$(git config submodule."$name".url)
 794                 displaypath="$prefix$path"
 795                 if test "$stage" = U
 796                 then
 797                         say "U$sha1 $displaypath"
 798                         continue
 799                 fi
 800                 if test -z "$url" || ! test -d "$path"/.git -o -f "$path"/.git
 801                 then
 802                         say "-$sha1 $displaypath"
 803                         continue;
 804                 fi
 805                 set_name_rev "$path" "$sha1"
 806                 if git diff-files --ignore-submodules=dirty --quiet -- "$path"
 807                 then
 808                         say " $sha1 $displaypath$revname"
 809                 else
 810                         if test -z "$cached"
 811                         then
 812                                 sha1=$(clear_local_git_env; cd "$path" && git rev-parse --verify HEAD)
 813                                 set_name_rev "$path" "$sha1"
 814                         fi
 815                         say "+$sha1 $displaypath$revname"
 816                 fi
 817
 818                 if test -n "$recursive"
 819                 then
 820                         (
 821                                 prefix="$displaypath/"
 822                                 clear_local_git_env
 823                                 cd "$path" &&
 824                                 eval cmd_status "$orig_args"
 825                         ) ||
 826                         die "Failed to recurse into submodule path '$path'"
 827                 fi
 828         done
 829 }
 830 #
 831 # Sync remote urls for submodules
 832 # This makes the value for remote.$remote.url match the value
 833 # specified in .gitmodules.
 834 #
 835 cmd_sync()
 836 {
 837         while test $# -ne 0
 838         do
 839                 case "$1" in
 840                 -q|--quiet)
 841                         GIT_QUIET=1
 842                         shift
 843                         ;;
 844                 --)
 845                         shift
 846                         break
 847                         ;;
 848                 -*)
 849                         usage
 850                         ;;
 851                 *)
 852                         break
 853                         ;;
 854                 esac
 855         done
 856         cd_to_toplevel
 857         module_list "$@" |
 858         while read mode sha1 stage path
 859         do
 860                 name=$(module_name "$path")
 861                 url=$(git config -f .gitmodules --get submodule."$name".url)
 862
 863                 # Possibly a url relative to parent
 864                 case "$url" in
 865                 ./*|../*)
 866                         url=$(resolve_relative_url "$url") || exit
 867                         ;;
 868                 esac
 869
 870                 say "Synchronizing submodule url for '$name'"
 871                 git config submodule."$name".url "$url"
 872
 873                 if test -e "$path"/.git
 874                 then
 875                 (
 876                         clear_local_git_env
 877                         cd "$path"
 878                         remote=$(get_default_remote)
 879                         git config remote."$remote".url "$url"
 880                 )
 881                 fi
 882         done
 883 }
 884
 885 # This loop parses the command line arguments to find the
 886 # subcommand name to dispatch.  Parsing of the subcommand specific
 887 # options are primarily done by the subcommand implementations.
 888 # Subcommand specific options such as --branch and --cached are
 889 # parsed here as well, for backward compatibility.
 890
 891 while test $# != 0 && test -z "$command"
 892 do
 893         case "$1" in
 894         add | foreach | init | update | status | summary | sync)
 895                 command=$1
 896                 ;;
 897         -q|--quiet)
 898                 GIT_QUIET=1
 899                 ;;
 900         -b|--branch)
 901                 case "$2" in
 902                 '')
 903                         usage
 904                         ;;
 905                 esac
 906                 branch="$2"; shift
 907                 ;;
 908         --cached)
 909                 cached="$1"
 910                 ;;
 911         --)
 912                 break
 913                 ;;
 914         -*)
 915                 usage
 916                 ;;
 917         *)
 918                 break
 919                 ;;
 920         esac
 921         shift
 922 done
 923
 924 # No command word defaults to "status"
 925 test -n "$command" || command=status
 926
 927 # "-b branch" is accepted only by "add"
 928 if test -n "$branch" && test "$command" != add
 929 then
 930         usage
 931 fi
 932
 933 # "--cached" is accepted only by "status" and "summary"
 934 if test -n "$cached" && test "$command" != status -a "$command" != summary
 935 then
 936         usage
 937 fi
 938
 939 "cmd_$command" "$@"