git-submodule.shon commit Merge branch 'jh/submodule-foreach' (adc5423)
   1#!/bin/sh
   2#
   3# git-submodules.sh: add, init, update or list git submodules
   4#
   5# Copyright (c) 2007 Lars Hjemli
   6
   7dashless=$(basename "$0" | sed -e 's/-/ /')
   8USAGE="[--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|--files] [--summary-limit <n>] [commit] [--] [<path>...]
  13   or: $dashless [--quiet] foreach [--recursive] <command>
  14   or: $dashless [--quiet] sync [--] [<path>...]"
  15OPTIONS_SPEC=
  16. git-sh-setup
  17. git-parse-remote
  18require_work_tree
  19
  20command=
  21branch=
  22reference=
  23cached=
  24files=
  25nofetch=
  26update=
  27prefix=
  28
  29# Resolve relative url by appending to parent's url
  30resolve_relative_url ()
  31{
  32        remote=$(get_default_remote)
  33        remoteurl=$(git config "remote.$remote.url") ||
  34                die "remote ($remote) does not have a url defined in .git/config"
  35        url="$1"
  36        remoteurl=${remoteurl%/}
  37        while test -n "$url"
  38        do
  39                case "$url" in
  40                ../*)
  41                        url="${url#../}"
  42                        remoteurl="${remoteurl%/*}"
  43                        ;;
  44                ./*)
  45                        url="${url#./}"
  46                        ;;
  47                *)
  48                        break;;
  49                esac
  50        done
  51        echo "$remoteurl/${url%/}"
  52}
  53
  54#
  55# Get submodule info for registered submodules
  56# $@ = path to limit submodule list
  57#
  58module_list()
  59{
  60        git ls-files --error-unmatch --stage -- "$@" | grep '^160000 '
  61}
  62
  63#
  64# Map submodule path to submodule name
  65#
  66# $1 = path
  67#
  68module_name()
  69{
  70        # Do we have "submodule.<something>.path = $1" defined in .gitmodules file?
  71        re=$(printf '%s\n' "$1" | sed -e 's/[].[^$\\*]/\\&/g')
  72        name=$( git config -f .gitmodules --get-regexp '^submodule\..*\.path$' |
  73                sed -n -e 's|^submodule\.\(.*\)\.path '"$re"'$|\1|p' )
  74       test -z "$name" &&
  75       die "No submodule mapping found in .gitmodules for path '$path'"
  76       echo "$name"
  77}
  78
  79#
  80# Clone a submodule
  81#
  82# Prior to calling, cmd_update checks that a possibly existing
  83# path is not a git repository.
  84# Likewise, cmd_add checks that path does not exist at all,
  85# since it is the location of a new submodule.
  86#
  87module_clone()
  88{
  89        path=$1
  90        url=$2
  91        reference="$3"
  92
  93        # If there already is a directory at the submodule path,
  94        # expect it to be empty (since that is the default checkout
  95        # action) and try to remove it.
  96        # Note: if $path is a symlink to a directory the test will
  97        # succeed but the rmdir will fail. We might want to fix this.
  98        if test -d "$path"
  99        then
 100                rmdir "$path" 2>/dev/null ||
 101                die "Directory '$path' exist, but is neither empty nor a git repository"
 102        fi
 103
 104        test -e "$path" &&
 105        die "A file already exist at path '$path'"
 106
 107        if test -n "$reference"
 108        then
 109                git-clone "$reference" -n "$url" "$path"
 110        else
 111                git-clone -n "$url" "$path"
 112        fi ||
 113        die "Clone of '$url' into submodule path '$path' failed"
 114}
 115
 116#
 117# Add a new submodule to the working tree, .gitmodules and the index
 118#
 119# $@ = repo path
 120#
 121# optional branch is stored in global branch variable
 122#
 123cmd_add()
 124{
 125        # parse $args after "submodule ... add".
 126        while test $# -ne 0
 127        do
 128                case "$1" in
 129                -b | --branch)
 130                        case "$2" in '') usage ;; esac
 131                        branch=$2
 132                        shift
 133                        ;;
 134                -q|--quiet)
 135                        GIT_QUIET=1
 136                        ;;
 137                --reference)
 138                        case "$2" in '') usage ;; esac
 139                        reference="--reference=$2"
 140                        shift
 141                        ;;
 142                --reference=*)
 143                        reference="$1"
 144                        shift
 145                        ;;
 146                --)
 147                        shift
 148                        break
 149                        ;;
 150                -*)
 151                        usage
 152                        ;;
 153                *)
 154                        break
 155                        ;;
 156                esac
 157                shift
 158        done
 159
 160        repo=$1
 161        path=$2
 162
 163        if test -z "$repo" -o -z "$path"; then
 164                usage
 165        fi
 166
 167        # assure repo is absolute or relative to parent
 168        case "$repo" in
 169        ./*|../*)
 170                # dereference source url relative to parent's url
 171                realrepo=$(resolve_relative_url "$repo") || exit
 172                ;;
 173        *:*|/*)
 174                # absolute url
 175                realrepo=$repo
 176                ;;
 177        *)
 178                die "repo URL: '$repo' must be absolute or begin with ./|../"
 179        ;;
 180        esac
 181
 182        # normalize path:
 183        # multiple //; leading ./; /./; /../; trailing /
 184        path=$(printf '%s/\n' "$path" |
 185                sed -e '
 186                        s|//*|/|g
 187                        s|^\(\./\)*||
 188                        s|/\./|/|g
 189                        :start
 190                        s|\([^/]*\)/\.\./||
 191                        tstart
 192                        s|/*$||
 193                ')
 194        git ls-files --error-unmatch "$path" > /dev/null 2>&1 &&
 195        die "'$path' already exists in the index"
 196
 197        # perhaps the path exists and is already a git repo, else clone it
 198        if test -e "$path"
 199        then
 200                if test -d "$path"/.git -o -f "$path"/.git
 201                then
 202                        echo "Adding existing repo at '$path' to the index"
 203                else
 204                        die "'$path' already exists and is not a valid git repo"
 205                fi
 206
 207                case "$repo" in
 208                ./*|../*)
 209                        url=$(resolve_relative_url "$repo") || exit
 210                    ;;
 211                *)
 212                        url="$repo"
 213                        ;;
 214                esac
 215                git config submodule."$path".url "$url"
 216        else
 217
 218                module_clone "$path" "$realrepo" "$reference" || exit
 219                (
 220                        unset GIT_DIR
 221                        cd "$path" &&
 222                        # ash fails to wordsplit ${branch:+-b "$branch"...}
 223                        case "$branch" in
 224                        '') git checkout -f -q ;;
 225                        ?*) git checkout -f -q -b "$branch" "origin/$branch" ;;
 226                        esac
 227                ) || die "Unable to checkout submodule '$path'"
 228        fi
 229
 230        git add "$path" ||
 231        die "Failed to add submodule '$path'"
 232
 233        git config -f .gitmodules submodule."$path".path "$path" &&
 234        git config -f .gitmodules submodule."$path".url "$repo" &&
 235        git add .gitmodules ||
 236        die "Failed to register submodule '$path'"
 237}
 238
 239#
 240# Execute an arbitrary command sequence in each checked out
 241# submodule
 242#
 243# $@ = command to execute
 244#
 245cmd_foreach()
 246{
 247        # parse $args after "submodule ... foreach".
 248        while test $# -ne 0
 249        do
 250                case "$1" in
 251                -q|--quiet)
 252                        GIT_QUIET=1
 253                        ;;
 254                --recursive)
 255                        recursive=1
 256                        ;;
 257                -*)
 258                        usage
 259                        ;;
 260                *)
 261                        break
 262                        ;;
 263                esac
 264                shift
 265        done
 266
 267        module_list |
 268        while read mode sha1 stage path
 269        do
 270                if test -e "$path"/.git
 271                then
 272                        say "Entering '$prefix$path'"
 273                        name=$(module_name "$path")
 274                        (
 275                                prefix="$prefix$path/"
 276                                unset GIT_DIR
 277                                cd "$path" &&
 278                                eval "$@" &&
 279                                if test -n "$recursive"
 280                                then
 281                                        cmd_foreach "--recursive" "$@"
 282                                fi
 283                        ) ||
 284                        die "Stopping at '$path'; script returned non-zero status."
 285                fi
 286        done
 287}
 288
 289#
 290# Register submodules in .git/config
 291#
 292# $@ = requested paths (default to all)
 293#
 294cmd_init()
 295{
 296        # parse $args after "submodule ... init".
 297        while test $# -ne 0
 298        do
 299                case "$1" in
 300                -q|--quiet)
 301                        GIT_QUIET=1
 302                        ;;
 303                --)
 304                        shift
 305                        break
 306                        ;;
 307                -*)
 308                        usage
 309                        ;;
 310                *)
 311                        break
 312                        ;;
 313                esac
 314                shift
 315        done
 316
 317        module_list "$@" |
 318        while read mode sha1 stage path
 319        do
 320                # Skip already registered paths
 321                name=$(module_name "$path") || exit
 322                url=$(git config submodule."$name".url)
 323                test -z "$url" || continue
 324
 325                url=$(git config -f .gitmodules submodule."$name".url)
 326                test -z "$url" &&
 327                die "No url found for submodule path '$path' in .gitmodules"
 328
 329                # Possibly a url relative to parent
 330                case "$url" in
 331                ./*|../*)
 332                        url=$(resolve_relative_url "$url") || exit
 333                        ;;
 334                esac
 335
 336                git config submodule."$name".url "$url" ||
 337                die "Failed to register url for submodule path '$path'"
 338
 339                upd="$(git config -f .gitmodules submodule."$name".update)"
 340                test -z "$upd" ||
 341                git config submodule."$name".update "$upd" ||
 342                die "Failed to register update mode for submodule path '$path'"
 343
 344                say "Submodule '$name' ($url) registered for path '$path'"
 345        done
 346}
 347
 348#
 349# Update each submodule path to correct revision, using clone and checkout as needed
 350#
 351# $@ = requested paths (default to all)
 352#
 353cmd_update()
 354{
 355        # parse $args after "submodule ... update".
 356        orig_args="$@"
 357        while test $# -ne 0
 358        do
 359                case "$1" in
 360                -q|--quiet)
 361                        shift
 362                        GIT_QUIET=1
 363                        ;;
 364                -i|--init)
 365                        init=1
 366                        shift
 367                        ;;
 368                -N|--no-fetch)
 369                        shift
 370                        nofetch=1
 371                        ;;
 372                -r|--rebase)
 373                        shift
 374                        update="rebase"
 375                        ;;
 376                --reference)
 377                        case "$2" in '') usage ;; esac
 378                        reference="--reference=$2"
 379                        shift 2
 380                        ;;
 381                --reference=*)
 382                        reference="$1"
 383                        shift
 384                        ;;
 385                -m|--merge)
 386                        shift
 387                        update="merge"
 388                        ;;
 389                --recursive)
 390                        shift
 391                        recursive=1
 392                        ;;
 393                --)
 394                        shift
 395                        break
 396                        ;;
 397                -*)
 398                        usage
 399                        ;;
 400                *)
 401                        break
 402                        ;;
 403                esac
 404        done
 405
 406        if test -n "$init"
 407        then
 408                cmd_init "--" "$@" || return
 409        fi
 410
 411        module_list "$@" |
 412        while read mode sha1 stage path
 413        do
 414                name=$(module_name "$path") || exit
 415                url=$(git config submodule."$name".url)
 416                update_module=$(git config submodule."$name".update)
 417                if test -z "$url"
 418                then
 419                        # Only mention uninitialized submodules when its
 420                        # path have been specified
 421                        test "$#" != "0" &&
 422                        say "Submodule path '$path' not initialized" &&
 423                        say "Maybe you want to use 'update --init'?"
 424                        continue
 425                fi
 426
 427                if ! test -d "$path"/.git -o -f "$path"/.git
 428                then
 429                        module_clone "$path" "$url" "$reference"|| exit
 430                        subsha1=
 431                else
 432                        subsha1=$(unset GIT_DIR; cd "$path" &&
 433                                git rev-parse --verify HEAD) ||
 434                        die "Unable to find current revision in submodule path '$path'"
 435                fi
 436
 437                if ! test -z "$update"
 438                then
 439                        update_module=$update
 440                fi
 441
 442                if test "$subsha1" != "$sha1"
 443                then
 444                        force=
 445                        if test -z "$subsha1"
 446                        then
 447                                force="-f"
 448                        fi
 449
 450                        if test -z "$nofetch"
 451                        then
 452                                (unset GIT_DIR; cd "$path" &&
 453                                        git-fetch) ||
 454                                die "Unable to fetch in submodule path '$path'"
 455                        fi
 456
 457                        case "$update_module" in
 458                        rebase)
 459                                command="git rebase"
 460                                action="rebase"
 461                                msg="rebased onto"
 462                                ;;
 463                        merge)
 464                                command="git merge"
 465                                action="merge"
 466                                msg="merged in"
 467                                ;;
 468                        *)
 469                                command="git checkout $force -q"
 470                                action="checkout"
 471                                msg="checked out"
 472                                ;;
 473                        esac
 474
 475                        (unset GIT_DIR; cd "$path" && $command "$sha1") ||
 476                        die "Unable to $action '$sha1' in submodule path '$path'"
 477                        say "Submodule path '$path': $msg '$sha1'"
 478                fi
 479
 480                if test -n "$recursive"
 481                then
 482                        (unset GIT_DIR; cd "$path" && cmd_update $orig_args) ||
 483                        die "Failed to recurse into submodule path '$path'"
 484                fi
 485        done
 486}
 487
 488set_name_rev () {
 489        revname=$( (
 490                unset GIT_DIR
 491                cd "$1" && {
 492                        git describe "$2" 2>/dev/null ||
 493                        git describe --tags "$2" 2>/dev/null ||
 494                        git describe --contains "$2" 2>/dev/null ||
 495                        git describe --all --always "$2"
 496                }
 497        ) )
 498        test -z "$revname" || revname=" ($revname)"
 499}
 500#
 501# Show commit summary for submodules in index or working tree
 502#
 503# If '--cached' is given, show summary between index and given commit,
 504# or between working tree and given commit
 505#
 506# $@ = [commit (default 'HEAD'),] requested paths (default all)
 507#
 508cmd_summary() {
 509        summary_limit=-1
 510        for_status=
 511        diff_cmd=diff-index
 512
 513        # parse $args after "submodule ... summary".
 514        while test $# -ne 0
 515        do
 516                case "$1" in
 517                --cached)
 518                        cached="$1"
 519                        ;;
 520                --files)
 521                        files="$1"
 522                        ;;
 523                --for-status)
 524                        for_status="$1"
 525                        ;;
 526                -n|--summary-limit)
 527                        if summary_limit=$(($2 + 0)) 2>/dev/null && test "$summary_limit" = "$2"
 528                        then
 529                                :
 530                        else
 531                                usage
 532                        fi
 533                        shift
 534                        ;;
 535                --)
 536                        shift
 537                        break
 538                        ;;
 539                -*)
 540                        usage
 541                        ;;
 542                *)
 543                        break
 544                        ;;
 545                esac
 546                shift
 547        done
 548
 549        test $summary_limit = 0 && return
 550
 551        if rev=$(git rev-parse -q --verify "$1^0")
 552        then
 553                head=$rev
 554                shift
 555        else
 556                head=HEAD
 557        fi
 558
 559        if [ -n "$files" ]
 560        then
 561                test -n "$cached" &&
 562                die "--cached cannot be used with --files"
 563                diff_cmd=diff-files
 564                head=
 565        fi
 566
 567        cd_to_toplevel
 568        # Get modified modules cared by user
 569        modules=$(git $diff_cmd $cached --raw $head -- "$@" |
 570                egrep '^:([0-7]* )?160000' |
 571                while read mod_src mod_dst sha1_src sha1_dst status name
 572                do
 573                        # Always show modules deleted or type-changed (blob<->module)
 574                        test $status = D -o $status = T && echo "$name" && continue
 575                        # Also show added or modified modules which are checked out
 576                        GIT_DIR="$name/.git" git-rev-parse --git-dir >/dev/null 2>&1 &&
 577                        echo "$name"
 578                done
 579        )
 580
 581        test -z "$modules" && return
 582
 583        git $diff_cmd $cached --raw $head -- $modules |
 584        egrep '^:([0-7]* )?160000' |
 585        cut -c2- |
 586        while read mod_src mod_dst sha1_src sha1_dst status name
 587        do
 588                if test -z "$cached" &&
 589                        test $sha1_dst = 0000000000000000000000000000000000000000
 590                then
 591                        case "$mod_dst" in
 592                        160000)
 593                                sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
 594                                ;;
 595                        100644 | 100755 | 120000)
 596                                sha1_dst=$(git hash-object $name)
 597                                ;;
 598                        000000)
 599                                ;; # removed
 600                        *)
 601                                # unexpected type
 602                                echo >&2 "unexpected mode $mod_dst"
 603                                continue ;;
 604                        esac
 605                fi
 606                missing_src=
 607                missing_dst=
 608
 609                test $mod_src = 160000 &&
 610                ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_src^0 >/dev/null &&
 611                missing_src=t
 612
 613                test $mod_dst = 160000 &&
 614                ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_dst^0 >/dev/null &&
 615                missing_dst=t
 616
 617                total_commits=
 618                case "$missing_src,$missing_dst" in
 619                t,)
 620                        errmsg="  Warn: $name doesn't contain commit $sha1_src"
 621                        ;;
 622                ,t)
 623                        errmsg="  Warn: $name doesn't contain commit $sha1_dst"
 624                        ;;
 625                t,t)
 626                        errmsg="  Warn: $name doesn't contain commits $sha1_src and $sha1_dst"
 627                        ;;
 628                *)
 629                        errmsg=
 630                        total_commits=$(
 631                        if test $mod_src = 160000 -a $mod_dst = 160000
 632                        then
 633                                range="$sha1_src...$sha1_dst"
 634                        elif test $mod_src = 160000
 635                        then
 636                                range=$sha1_src
 637                        else
 638                                range=$sha1_dst
 639                        fi
 640                        GIT_DIR="$name/.git" \
 641                        git log --pretty=oneline --first-parent $range | wc -l
 642                        )
 643                        total_commits=" ($(($total_commits + 0)))"
 644                        ;;
 645                esac
 646
 647                sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
 648                sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
 649                if test $status = T
 650                then
 651                        if test $mod_dst = 160000
 652                        then
 653                                echo "* $name $sha1_abbr_src(blob)->$sha1_abbr_dst(submodule)$total_commits:"
 654                        else
 655                                echo "* $name $sha1_abbr_src(submodule)->$sha1_abbr_dst(blob)$total_commits:"
 656                        fi
 657                else
 658                        echo "* $name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
 659                fi
 660                if test -n "$errmsg"
 661                then
 662                        # Don't give error msg for modification whose dst is not submodule
 663                        # i.e. deleted or changed to blob
 664                        test $mod_dst = 160000 && echo "$errmsg"
 665                else
 666                        if test $mod_src = 160000 -a $mod_dst = 160000
 667                        then
 668                                limit=
 669                                test $summary_limit -gt 0 && limit="-$summary_limit"
 670                                GIT_DIR="$name/.git" \
 671                                git log $limit --pretty='format:  %m %s' \
 672                                --first-parent $sha1_src...$sha1_dst
 673                        elif test $mod_dst = 160000
 674                        then
 675                                GIT_DIR="$name/.git" \
 676                                git log --pretty='format:  > %s' -1 $sha1_dst
 677                        else
 678                                GIT_DIR="$name/.git" \
 679                                git log --pretty='format:  < %s' -1 $sha1_src
 680                        fi
 681                        echo
 682                fi
 683                echo
 684        done |
 685        if test -n "$for_status"; then
 686                echo "# Modified submodules:"
 687                echo "#"
 688                sed -e 's|^|# |' -e 's|^# $|#|'
 689        else
 690                cat
 691        fi
 692}
 693#
 694# List all submodules, prefixed with:
 695#  - submodule not initialized
 696#  + different revision checked out
 697#
 698# If --cached was specified the revision in the index will be printed
 699# instead of the currently checked out revision.
 700#
 701# $@ = requested paths (default to all)
 702#
 703cmd_status()
 704{
 705        # parse $args after "submodule ... status".
 706        orig_args="$@"
 707        while test $# -ne 0
 708        do
 709                case "$1" in
 710                -q|--quiet)
 711                        GIT_QUIET=1
 712                        ;;
 713                --cached)
 714                        cached=1
 715                        ;;
 716                --recursive)
 717                        recursive=1
 718                        ;;
 719                --)
 720                        shift
 721                        break
 722                        ;;
 723                -*)
 724                        usage
 725                        ;;
 726                *)
 727                        break
 728                        ;;
 729                esac
 730                shift
 731        done
 732
 733        module_list "$@" |
 734        while read mode sha1 stage path
 735        do
 736                name=$(module_name "$path") || exit
 737                url=$(git config submodule."$name".url)
 738                displaypath="$prefix$path"
 739                if test -z "$url" || ! test -d "$path"/.git -o -f "$path"/.git
 740                then
 741                        say "-$sha1 $displaypath"
 742                        continue;
 743                fi
 744                set_name_rev "$path" "$sha1"
 745                if git diff-files --quiet -- "$path"
 746                then
 747                        say " $sha1 $displaypath$revname"
 748                else
 749                        if test -z "$cached"
 750                        then
 751                                sha1=$(unset GIT_DIR; cd "$path" && git rev-parse --verify HEAD)
 752                                set_name_rev "$path" "$sha1"
 753                        fi
 754                        say "+$sha1 $displaypath$revname"
 755                fi
 756
 757                if test -n "$recursive"
 758                then
 759                        (
 760                                prefix="$displaypath/"
 761                                unset GIT_DIR
 762                                cd "$path" &&
 763                                cmd_status $orig_args
 764                        ) ||
 765                        die "Failed to recurse into submodule path '$path'"
 766                fi
 767        done
 768}
 769#
 770# Sync remote urls for submodules
 771# This makes the value for remote.$remote.url match the value
 772# specified in .gitmodules.
 773#
 774cmd_sync()
 775{
 776        while test $# -ne 0
 777        do
 778                case "$1" in
 779                -q|--quiet)
 780                        GIT_QUIET=1
 781                        shift
 782                        ;;
 783                --)
 784                        shift
 785                        break
 786                        ;;
 787                -*)
 788                        usage
 789                        ;;
 790                *)
 791                        break
 792                        ;;
 793                esac
 794        done
 795        cd_to_toplevel
 796        module_list "$@" |
 797        while read mode sha1 stage path
 798        do
 799                name=$(module_name "$path")
 800                url=$(git config -f .gitmodules --get submodule."$name".url)
 801
 802                # Possibly a url relative to parent
 803                case "$url" in
 804                ./*|../*)
 805                        url=$(resolve_relative_url "$url") || exit
 806                        ;;
 807                esac
 808
 809                if test -e "$path"/.git
 810                then
 811                (
 812                        unset GIT_DIR
 813                        cd "$path"
 814                        remote=$(get_default_remote)
 815                        say "Synchronizing submodule url for '$name'"
 816                        git config remote."$remote".url "$url"
 817                )
 818                fi
 819        done
 820}
 821
 822# This loop parses the command line arguments to find the
 823# subcommand name to dispatch.  Parsing of the subcommand specific
 824# options are primarily done by the subcommand implementations.
 825# Subcommand specific options such as --branch and --cached are
 826# parsed here as well, for backward compatibility.
 827
 828while test $# != 0 && test -z "$command"
 829do
 830        case "$1" in
 831        add | foreach | init | update | status | summary | sync)
 832                command=$1
 833                ;;
 834        -q|--quiet)
 835                GIT_QUIET=1
 836                ;;
 837        -b|--branch)
 838                case "$2" in
 839                '')
 840                        usage
 841                        ;;
 842                esac
 843                branch="$2"; shift
 844                ;;
 845        --cached)
 846                cached="$1"
 847                ;;
 848        --)
 849                break
 850                ;;
 851        -*)
 852                usage
 853                ;;
 854        *)
 855                break
 856                ;;
 857        esac
 858        shift
 859done
 860
 861# No command word defaults to "status"
 862test -n "$command" || command=status
 863
 864# "-b branch" is accepted only by "add"
 865if test -n "$branch" && test "$command" != add
 866then
 867        usage
 868fi
 869
 870# "--cached" is accepted only by "status" and "summary"
 871if test -n "$cached" && test "$command" != status -a "$command" != summary
 872then
 873        usage
 874fi
 875
 876"cmd_$command" "$@"