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] [--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] [--summary-limit <n>] [commit] [--] [<path>...]
  13    or: $dashless [--quiet] foreach [--recursive] <command>
  14    or: $dashless [--quiet] sync [--] [<path>...]"
  15 OPTIONS_SPEC=
  16 . git-sh-setup
  17 . git-parse-remote
  18 require_work_tree
  19
  20 command=
  21 branch=
  22 reference=
  23 cached=
  24 nofetch=
  25 update=
  26 prefix=
  27
  28 # Resolve relative url by appending to parent's url
  29 resolve_relative_url ()
  30 {
  31         remote=$(get_default_remote)
  32         remoteurl=$(git config "remote.$remote.url") ||
  33                 die "remote ($remote) does not have a url defined in .git/config"
  34         url="$1"
  35         remoteurl=${remoteurl%/}
  36         while test -n "$url"
  37         do
  38                 case "$url" in
  39                 ../*)
  40                         url="${url#../}"
  41                         remoteurl="${remoteurl%/*}"
  42                         ;;
  43                 ./*)
  44                         url="${url#./}"
  45                         ;;
  46                 *)
  47                         break;;
  48                 esac
  49         done
  50         echo "$remoteurl/${url%/}"
  51 }
  52
  53 #
  54 # Get submodule info for registered submodules
  55 # $@ = path to limit submodule list
  56 #
  57 module_list()
  58 {
  59         git ls-files --error-unmatch --stage -- "$@" | grep '^160000 '
  60 }
  61
  62 #
  63 # Map submodule path to submodule name
  64 #
  65 # $1 = path
  66 #
  67 module_name()
  68 {
  69         # Do we have "submodule.<something>.path = $1" defined in .gitmodules file?
  70         re=$(printf '%s\n' "$1" | sed -e 's/[].[^$\\*]/\\&/g')
  71         name=$( git config -f .gitmodules --get-regexp '^submodule\..*\.path$' |
  72                 sed -n -e 's|^submodule\.\(.*\)\.path '"$re"'$|\1|p' )
  73        test -z "$name" &&
  74        die "No submodule mapping found in .gitmodules for path '$path'"
  75        echo "$name"
  76 }
  77
  78 #
  79 # Clone a submodule
  80 #
  81 # Prior to calling, cmd_update checks that a possibly existing
  82 # path is not a git repository.
  83 # Likewise, cmd_add checks that path does not exist at all,
  84 # since it is the location of a new submodule.
  85 #
  86 module_clone()
  87 {
  88         path=$1
  89         url=$2
  90         reference="$3"
  91
  92         # If there already is a directory at the submodule path,
  93         # expect it to be empty (since that is the default checkout
  94         # action) and try to remove it.
  95         # Note: if $path is a symlink to a directory the test will
  96         # succeed but the rmdir will fail. We might want to fix this.
  97         if test -d "$path"
  98         then
  99                 rmdir "$path" 2>/dev/null ||
 100                 die "Directory '$path' exist, but is neither empty nor a git repository"
 101         fi
 102
 103         test -e "$path" &&
 104         die "A file already exist at path '$path'"
 105
 106         if test -n "$reference"
 107         then
 108                 git-clone "$reference" -n "$url" "$path"
 109         else
 110                 git-clone -n "$url" "$path"
 111         fi ||
 112         die "Clone of '$url' into submodule path '$path' failed"
 113 }
 114
 115 #
 116 # Add a new submodule to the working tree, .gitmodules and the index
 117 #
 118 # $@ = repo path
 119 #
 120 # optional branch is stored in global branch variable
 121 #
 122 cmd_add()
 123 {
 124         # parse $args after "submodule ... add".
 125         while test $# -ne 0
 126         do
 127                 case "$1" in
 128                 -b | --branch)
 129                         case "$2" in '') usage ;; esac
 130                         branch=$2
 131                         shift
 132                         ;;
 133                 -q|--quiet)
 134                         GIT_QUIET=1
 135                         ;;
 136                 --reference)
 137                         case "$2" in '') usage ;; esac
 138                         reference="--reference=$2"
 139                         shift
 140                         ;;
 141                 --reference=*)
 142                         reference="$1"
 143                         shift
 144                         ;;
 145                 --)
 146                         shift
 147                         break
 148                         ;;
 149                 -*)
 150                         usage
 151                         ;;
 152                 *)
 153                         break
 154                         ;;
 155                 esac
 156                 shift
 157         done
 158
 159         repo=$1
 160         path=$2
 161
 162         if test -z "$repo" -o -z "$path"; then
 163                 usage
 164         fi
 165
 166         # assure repo is absolute or relative to parent
 167         case "$repo" in
 168         ./*|../*)
 169                 # dereference source url relative to parent's url
 170                 realrepo=$(resolve_relative_url "$repo") || exit
 171                 ;;
 172         *:*|/*)
 173                 # absolute url
 174                 realrepo=$repo
 175                 ;;
 176         *)
 177                 die "repo URL: '$repo' must be absolute or begin with ./|../"
 178         ;;
 179         esac
 180
 181         # normalize path:
 182         # multiple //; leading ./; /./; /../; trailing /
 183         path=$(printf '%s/\n' "$path" |
 184                 sed -e '
 185                         s|//*|/|g
 186                         s|^\(\./\)*||
 187                         s|/\./|/|g
 188                         :start
 189                         s|\([^/]*\)/\.\./||
 190                         tstart
 191                         s|/*$||
 192                 ')
 193         git ls-files --error-unmatch "$path" > /dev/null 2>&1 &&
 194         die "'$path' already exists in the index"
 195
 196         # perhaps the path exists and is already a git repo, else clone it
 197         if test -e "$path"
 198         then
 199                 if test -d "$path"/.git -o -f "$path"/.git
 200                 then
 201                         echo "Adding existing repo at '$path' to the index"
 202                 else
 203                         die "'$path' already exists and is not a valid git repo"
 204                 fi
 205
 206                 case "$repo" in
 207                 ./*|../*)
 208                         url=$(resolve_relative_url "$repo") || exit
 209                     ;;
 210                 *)
 211                         url="$repo"
 212                         ;;
 213                 esac
 214                 git config submodule."$path".url "$url"
 215         else
 216
 217                 module_clone "$path" "$realrepo" "$reference" || exit
 218                 (
 219                         unset GIT_DIR
 220                         cd "$path" &&
 221                         # ash fails to wordsplit ${branch:+-b "$branch"...}
 222                         case "$branch" in
 223                         '') git checkout -f -q ;;
 224                         ?*) git checkout -f -q -b "$branch" "origin/$branch" ;;
 225                         esac
 226                 ) || die "Unable to checkout submodule '$path'"
 227         fi
 228
 229         git add "$path" ||
 230         die "Failed to add submodule '$path'"
 231
 232         git config -f .gitmodules submodule."$path".path "$path" &&
 233         git config -f .gitmodules submodule."$path".url "$repo" &&
 234         git add .gitmodules ||
 235         die "Failed to register submodule '$path'"
 236 }
 237
 238 #
 239 # Execute an arbitrary command sequence in each checked out
 240 # submodule
 241 #
 242 # $@ = command to execute
 243 #
 244 cmd_foreach()
 245 {
 246         # parse $args after "submodule ... foreach".
 247         while test $# -ne 0
 248         do
 249                 case "$1" in
 250                 -q|--quiet)
 251                         GIT_QUIET=1
 252                         ;;
 253                 --recursive)
 254                         recursive=1
 255                         ;;
 256                 -*)
 257                         usage
 258                         ;;
 259                 *)
 260                         break
 261                         ;;
 262                 esac
 263                 shift
 264         done
 265
 266         module_list |
 267         while read mode sha1 stage path
 268         do
 269                 if test -e "$path"/.git
 270                 then
 271                         say "Entering '$prefix$path'"
 272                         name=$(module_name "$path")
 273                         (
 274                                 prefix="$prefix$path/"
 275                                 unset GIT_DIR
 276                                 cd "$path" &&
 277                                 eval "$@" &&
 278                                 if test -n "$recursive"
 279                                 then
 280                                         cmd_foreach "--recursive" "$@"
 281                                 fi
 282                         ) ||
 283                         die "Stopping at '$path'; script returned non-zero status."
 284                 fi
 285         done
 286 }
 287
 288 #
 289 # Register submodules in .git/config
 290 #
 291 # $@ = requested paths (default to all)
 292 #
 293 cmd_init()
 294 {
 295         # parse $args after "submodule ... init".
 296         while test $# -ne 0
 297         do
 298                 case "$1" in
 299                 -q|--quiet)
 300                         GIT_QUIET=1
 301                         ;;
 302                 --)
 303                         shift
 304                         break
 305                         ;;
 306                 -*)
 307                         usage
 308                         ;;
 309                 *)
 310                         break
 311                         ;;
 312                 esac
 313                 shift
 314         done
 315
 316         module_list "$@" |
 317         while read mode sha1 stage path
 318         do
 319                 # Skip already registered paths
 320                 name=$(module_name "$path") || exit
 321                 url=$(git config submodule."$name".url)
 322                 test -z "$url" || continue
 323
 324                 url=$(git config -f .gitmodules submodule."$name".url)
 325                 test -z "$url" &&
 326                 die "No url found for submodule path '$path' in .gitmodules"
 327
 328                 # Possibly a url relative to parent
 329                 case "$url" in
 330                 ./*|../*)
 331                         url=$(resolve_relative_url "$url") || exit
 332                         ;;
 333                 esac
 334
 335                 git config submodule."$name".url "$url" ||
 336                 die "Failed to register url for submodule path '$path'"
 337
 338                 upd="$(git config -f .gitmodules submodule."$name".update)"
 339                 test -z "$upd" ||
 340                 git config submodule."$name".update "$upd" ||
 341                 die "Failed to register update mode for submodule path '$path'"
 342
 343                 say "Submodule '$name' ($url) registered for path '$path'"
 344         done
 345 }
 346
 347 #
 348 # Update each submodule path to correct revision, using clone and checkout as needed
 349 #
 350 # $@ = requested paths (default to all)
 351 #
 352 cmd_update()
 353 {
 354         # parse $args after "submodule ... update".
 355         orig_args="$@"
 356         while test $# -ne 0
 357         do
 358                 case "$1" in
 359                 -q|--quiet)
 360                         shift
 361                         GIT_QUIET=1
 362                         ;;
 363                 -i|--init)
 364                         init=1
 365                         shift
 366                         ;;
 367                 -N|--no-fetch)
 368                         shift
 369                         nofetch=1
 370                         ;;
 371                 -r|--rebase)
 372                         shift
 373                         update="rebase"
 374                         ;;
 375                 --reference)
 376                         case "$2" in '') usage ;; esac
 377                         reference="--reference=$2"
 378                         shift 2
 379                         ;;
 380                 --reference=*)
 381                         reference="$1"
 382                         shift
 383                         ;;
 384                 -m|--merge)
 385                         shift
 386                         update="merge"
 387                         ;;
 388                 --recursive)
 389                         shift
 390                         recursive=1
 391                         ;;
 392                 --)
 393                         shift
 394                         break
 395                         ;;
 396                 -*)
 397                         usage
 398                         ;;
 399                 *)
 400                         break
 401                         ;;
 402                 esac
 403         done
 404
 405         if test -n "$init"
 406         then
 407                 cmd_init "--" "$@" || return
 408         fi
 409
 410         module_list "$@" |
 411         while read mode sha1 stage path
 412         do
 413                 name=$(module_name "$path") || exit
 414                 url=$(git config submodule."$name".url)
 415                 update_module=$(git config submodule."$name".update)
 416                 if test -z "$url"
 417                 then
 418                         # Only mention uninitialized submodules when its
 419                         # path have been specified
 420                         test "$#" != "0" &&
 421                         say "Submodule path '$path' not initialized" &&
 422                         say "Maybe you want to use 'update --init'?"
 423                         continue
 424                 fi
 425
 426                 if ! test -d "$path"/.git -o -f "$path"/.git
 427                 then
 428                         module_clone "$path" "$url" "$reference"|| exit
 429                         subsha1=
 430                 else
 431                         subsha1=$(unset GIT_DIR; cd "$path" &&
 432                                 git rev-parse --verify HEAD) ||
 433                         die "Unable to find current revision in submodule path '$path'"
 434                 fi
 435
 436                 if ! test -z "$update"
 437                 then
 438                         update_module=$update
 439                 fi
 440
 441                 if test "$subsha1" != "$sha1"
 442                 then
 443                         force=
 444                         if test -z "$subsha1"
 445                         then
 446                                 force="-f"
 447                         fi
 448
 449                         if test -z "$nofetch"
 450                         then
 451                                 (unset GIT_DIR; cd "$path" &&
 452                                         git-fetch) ||
 453                                 die "Unable to fetch in submodule path '$path'"
 454                         fi
 455
 456                         case "$update_module" in
 457                         rebase)
 458                                 command="git rebase"
 459                                 action="rebase"
 460                                 msg="rebased onto"
 461                                 ;;
 462                         merge)
 463                                 command="git merge"
 464                                 action="merge"
 465                                 msg="merged in"
 466                                 ;;
 467                         *)
 468                                 command="git checkout $force -q"
 469                                 action="checkout"
 470                                 msg="checked out"
 471                                 ;;
 472                         esac
 473
 474                         (unset GIT_DIR; cd "$path" && $command "$sha1") ||
 475                         die "Unable to $action '$sha1' in submodule path '$path'"
 476                         say "Submodule path '$path': $msg '$sha1'"
 477                 fi
 478
 479                 if test -n "$recursive"
 480                 then
 481                         (unset GIT_DIR; cd "$path" && cmd_update $orig_args) ||
 482                         die "Failed to recurse into submodule path '$path'"
 483                 fi
 484         done
 485 }
 486
 487 set_name_rev () {
 488         revname=$( (
 489                 unset GIT_DIR
 490                 cd "$1" && {
 491                         git describe "$2" 2>/dev/null ||
 492                         git describe --tags "$2" 2>/dev/null ||
 493                         git describe --contains "$2" 2>/dev/null ||
 494                         git describe --all --always "$2"
 495                 }
 496         ) )
 497         test -z "$revname" || revname=" ($revname)"
 498 }
 499 #
 500 # Show commit summary for submodules in index or working tree
 501 #
 502 # If '--cached' is given, show summary between index and given commit,
 503 # or between working tree and given commit
 504 #
 505 # $@ = [commit (default 'HEAD'),] requested paths (default all)
 506 #
 507 cmd_summary() {
 508         summary_limit=-1
 509         for_status=
 510
 511         # parse $args after "submodule ... summary".
 512         while test $# -ne 0
 513         do
 514                 case "$1" in
 515                 --cached)
 516                         cached="$1"
 517                         ;;
 518                 --for-status)
 519                         for_status="$1"
 520                         ;;
 521                 -n|--summary-limit)
 522                         if summary_limit=$(($2 + 0)) 2>/dev/null && test "$summary_limit" = "$2"
 523                         then
 524                                 :
 525                         else
 526                                 usage
 527                         fi
 528                         shift
 529                         ;;
 530                 --)
 531                         shift
 532                         break
 533                         ;;
 534                 -*)
 535                         usage
 536                         ;;
 537                 *)
 538                         break
 539                         ;;
 540                 esac
 541                 shift
 542         done
 543
 544         test $summary_limit = 0 && return
 545
 546         if rev=$(git rev-parse -q --verify "$1^0")
 547         then
 548                 head=$rev
 549                 shift
 550         else
 551                 head=HEAD
 552         fi
 553
 554         cd_to_toplevel
 555         # Get modified modules cared by user
 556         modules=$(git diff-index $cached --raw $head -- "$@" |
 557                 egrep '^:([0-7]* )?160000' |
 558                 while read mod_src mod_dst sha1_src sha1_dst status name
 559                 do
 560                         # Always show modules deleted or type-changed (blob<->module)
 561                         test $status = D -o $status = T && echo "$name" && continue
 562                         # Also show added or modified modules which are checked out
 563                         GIT_DIR="$name/.git" git-rev-parse --git-dir >/dev/null 2>&1 &&
 564                         echo "$name"
 565                 done
 566         )
 567
 568         test -z "$modules" && return
 569
 570         git diff-index $cached --raw $head -- $modules |
 571         egrep '^:([0-7]* )?160000' |
 572         cut -c2- |
 573         while read mod_src mod_dst sha1_src sha1_dst status name
 574         do
 575                 if test -z "$cached" &&
 576                         test $sha1_dst = 0000000000000000000000000000000000000000
 577                 then
 578                         case "$mod_dst" in
 579                         160000)
 580                                 sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
 581                                 ;;
 582                         100644 | 100755 | 120000)
 583                                 sha1_dst=$(git hash-object $name)
 584                                 ;;
 585                         000000)
 586                                 ;; # removed
 587                         *)
 588                                 # unexpected type
 589                                 echo >&2 "unexpected mode $mod_dst"
 590                                 continue ;;
 591                         esac
 592                 fi
 593                 missing_src=
 594                 missing_dst=
 595
 596                 test $mod_src = 160000 &&
 597                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_src^0 >/dev/null &&
 598                 missing_src=t
 599
 600                 test $mod_dst = 160000 &&
 601                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_dst^0 >/dev/null &&
 602                 missing_dst=t
 603
 604                 total_commits=
 605                 case "$missing_src,$missing_dst" in
 606                 t,)
 607                         errmsg="  Warn: $name doesn't contain commit $sha1_src"
 608                         ;;
 609                 ,t)
 610                         errmsg="  Warn: $name doesn't contain commit $sha1_dst"
 611                         ;;
 612                 t,t)
 613                         errmsg="  Warn: $name doesn't contain commits $sha1_src and $sha1_dst"
 614                         ;;
 615                 *)
 616                         errmsg=
 617                         total_commits=$(
 618                         if test $mod_src = 160000 -a $mod_dst = 160000
 619                         then
 620                                 range="$sha1_src...$sha1_dst"
 621                         elif test $mod_src = 160000
 622                         then
 623                                 range=$sha1_src
 624                         else
 625                                 range=$sha1_dst
 626                         fi
 627                         GIT_DIR="$name/.git" \
 628                         git log --pretty=oneline --first-parent $range | wc -l
 629                         )
 630                         total_commits=" ($(($total_commits + 0)))"
 631                         ;;
 632                 esac
 633
 634                 sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
 635                 sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
 636                 if test $status = T
 637                 then
 638                         if test $mod_dst = 160000
 639                         then
 640                                 echo "* $name $sha1_abbr_src(blob)->$sha1_abbr_dst(submodule)$total_commits:"
 641                         else
 642                                 echo "* $name $sha1_abbr_src(submodule)->$sha1_abbr_dst(blob)$total_commits:"
 643                         fi
 644                 else
 645                         echo "* $name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
 646                 fi
 647                 if test -n "$errmsg"
 648                 then
 649                         # Don't give error msg for modification whose dst is not submodule
 650                         # i.e. deleted or changed to blob
 651                         test $mod_dst = 160000 && echo "$errmsg"
 652                 else
 653                         if test $mod_src = 160000 -a $mod_dst = 160000
 654                         then
 655                                 limit=
 656                                 test $summary_limit -gt 0 && limit="-$summary_limit"
 657                                 GIT_DIR="$name/.git" \
 658                                 git log $limit --pretty='format:  %m %s' \
 659                                 --first-parent $sha1_src...$sha1_dst
 660                         elif test $mod_dst = 160000
 661                         then
 662                                 GIT_DIR="$name/.git" \
 663                                 git log --pretty='format:  > %s' -1 $sha1_dst
 664                         else
 665                                 GIT_DIR="$name/.git" \
 666                                 git log --pretty='format:  < %s' -1 $sha1_src
 667                         fi
 668                         echo
 669                 fi
 670                 echo
 671         done |
 672         if test -n "$for_status"; then
 673                 echo "# Modified submodules:"
 674                 echo "#"
 675                 sed -e 's|^|# |' -e 's|^# $|#|'
 676         else
 677                 cat
 678         fi
 679 }
 680 #
 681 # List all submodules, prefixed with:
 682 #  - submodule not initialized
 683 #  + different revision checked out
 684 #
 685 # If --cached was specified the revision in the index will be printed
 686 # instead of the currently checked out revision.
 687 #
 688 # $@ = requested paths (default to all)
 689 #
 690 cmd_status()
 691 {
 692         # parse $args after "submodule ... status".
 693         orig_args="$@"
 694         while test $# -ne 0
 695         do
 696                 case "$1" in
 697                 -q|--quiet)
 698                         GIT_QUIET=1
 699                         ;;
 700                 --cached)
 701                         cached=1
 702                         ;;
 703                 --recursive)
 704                         recursive=1
 705                         ;;
 706                 --)
 707                         shift
 708                         break
 709                         ;;
 710                 -*)
 711                         usage
 712                         ;;
 713                 *)
 714                         break
 715                         ;;
 716                 esac
 717                 shift
 718         done
 719
 720         module_list "$@" |
 721         while read mode sha1 stage path
 722         do
 723                 name=$(module_name "$path") || exit
 724                 url=$(git config submodule."$name".url)
 725                 displaypath="$prefix$path"
 726                 if test -z "$url" || ! test -d "$path"/.git -o -f "$path"/.git
 727                 then
 728                         say "-$sha1 $displaypath"
 729                         continue;
 730                 fi
 731                 set_name_rev "$path" "$sha1"
 732                 if git diff-files --quiet -- "$path"
 733                 then
 734                         say " $sha1 $displaypath$revname"
 735                 else
 736                         if test -z "$cached"
 737                         then
 738                                 sha1=$(unset GIT_DIR; cd "$path" && git rev-parse --verify HEAD)
 739                                 set_name_rev "$path" "$sha1"
 740                         fi
 741                         say "+$sha1 $displaypath$revname"
 742                 fi
 743
 744                 if test -n "$recursive"
 745                 then
 746                         (
 747                                 prefix="$displaypath/"
 748                                 unset GIT_DIR
 749                                 cd "$path" &&
 750                                 cmd_status $orig_args
 751                         ) ||
 752                         die "Failed to recurse into submodule path '$path'"
 753                 fi
 754         done
 755 }
 756 #
 757 # Sync remote urls for submodules
 758 # This makes the value for remote.$remote.url match the value
 759 # specified in .gitmodules.
 760 #
 761 cmd_sync()
 762 {
 763         while test $# -ne 0
 764         do
 765                 case "$1" in
 766                 -q|--quiet)
 767                         GIT_QUIET=1
 768                         shift
 769                         ;;
 770                 --)
 771                         shift
 772                         break
 773                         ;;
 774                 -*)
 775                         usage
 776                         ;;
 777                 *)
 778                         break
 779                         ;;
 780                 esac
 781         done
 782         cd_to_toplevel
 783         module_list "$@" |
 784         while read mode sha1 stage path
 785         do
 786                 name=$(module_name "$path")
 787                 url=$(git config -f .gitmodules --get submodule."$name".url)
 788
 789                 # Possibly a url relative to parent
 790                 case "$url" in
 791                 ./*|../*)
 792                         url=$(resolve_relative_url "$url") || exit
 793                         ;;
 794                 esac
 795
 796                 if test -e "$path"/.git
 797                 then
 798                 (
 799                         unset GIT_DIR
 800                         cd "$path"
 801                         remote=$(get_default_remote)
 802                         say "Synchronizing submodule url for '$name'"
 803                         git config remote."$remote".url "$url"
 804                 )
 805                 fi
 806         done
 807 }
 808
 809 # This loop parses the command line arguments to find the
 810 # subcommand name to dispatch.  Parsing of the subcommand specific
 811 # options are primarily done by the subcommand implementations.
 812 # Subcommand specific options such as --branch and --cached are
 813 # parsed here as well, for backward compatibility.
 814
 815 while test $# != 0 && test -z "$command"
 816 do
 817         case "$1" in
 818         add | foreach | init | update | status | summary | sync)
 819                 command=$1
 820                 ;;
 821         -q|--quiet)
 822                 GIT_QUIET=1
 823                 ;;
 824         -b|--branch)
 825                 case "$2" in
 826                 '')
 827                         usage
 828                         ;;
 829                 esac
 830                 branch="$2"; shift
 831                 ;;
 832         --cached)
 833                 cached="$1"
 834                 ;;
 835         --)
 836                 break
 837                 ;;
 838         -*)
 839                 usage
 840                 ;;
 841         *)
 842                 break
 843                 ;;
 844         esac
 845         shift
 846 done
 847
 848 # No command word defaults to "status"
 849 test -n "$command" || command=status
 850
 851 # "-b branch" is accepted only by "add"
 852 if test -n "$branch" && test "$command" != add
 853 then
 854         usage
 855 fi
 856
 857 # "--cached" is accepted only by "status" and "summary"
 858 if test -n "$cached" && test "$command" != status -a "$command" != summary
 859 then
 860         usage
 861 fi
 862
 863 "cmd_$command" "$@"