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