git-submodule.shon commit Merge branch 'jk/merge-one-file-working-tree' into maint (8272bca)
   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] [-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: $dashless [--quiet] sync [--] [<path>...]"
  15OPTIONS_SPEC=
  16. git-sh-setup
  17. git-parse-remote
  18require_work_tree
  19
  20command=
  21branch=
  22force=
  23reference=
  24cached=
  25recursive=
  26init=
  27files=
  28nofetch=
  29update=
  30prefix=
  31
  32# Resolve relative url by appending to parent's url
  33resolve_relative_url ()
  34{
  35        remote=$(get_default_remote)
  36        remoteurl=$(git config "remote.$remote.url") ||
  37                die "remote ($remote) does not have a url defined in .git/config"
  38        url="$1"
  39        remoteurl=${remoteurl%/}
  40        sep=/
  41        while test -n "$url"
  42        do
  43                case "$url" in
  44                ../*)
  45                        url="${url#../}"
  46                        case "$remoteurl" in
  47                        */*)
  48                                remoteurl="${remoteurl%/*}"
  49                                ;;
  50                        *:*)
  51                                remoteurl="${remoteurl%:*}"
  52                                sep=:
  53                                ;;
  54                        *)
  55                                die "cannot strip one component off url '$remoteurl'"
  56                                ;;
  57                        esac
  58                        ;;
  59                ./*)
  60                        url="${url#./}"
  61                        ;;
  62                *)
  63                        break;;
  64                esac
  65        done
  66        echo "$remoteurl$sep${url%/}"
  67}
  68
  69#
  70# Get submodule info for registered submodules
  71# $@ = path to limit submodule list
  72#
  73module_list()
  74{
  75        git ls-files --error-unmatch --stage -- "$@" |
  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#
 100module_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#
 119module_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#
 141cmd_add()
 142{
 143        # parse $args after "submodule ... add".
 144        while test $# -ne 0
 145        do
 146                case "$1" in
 147                -b | --branch)
 148                        case "$2" in '') usage ;; esac
 149                        branch=$2
 150                        shift
 151                        ;;
 152                -f | --force)
 153                        force=$1
 154                        ;;
 155                -q|--quiet)
 156                        GIT_QUIET=1
 157                        ;;
 158                --reference)
 159                        case "$2" in '') usage ;; esac
 160                        reference="--reference=$2"
 161                        shift
 162                        ;;
 163                --reference=*)
 164                        reference="$1"
 165                        shift
 166                        ;;
 167                --)
 168                        shift
 169                        break
 170                        ;;
 171                -*)
 172                        usage
 173                        ;;
 174                *)
 175                        break
 176                        ;;
 177                esac
 178                shift
 179        done
 180
 181        repo=$1
 182        path=$2
 183
 184        if test -z "$path"; then
 185                path=$(echo "$repo" |
 186                        sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
 187        fi
 188
 189        if test -z "$repo" -o -z "$path"; then
 190                usage
 191        fi
 192
 193        # assure repo is absolute or relative to parent
 194        case "$repo" in
 195        ./*|../*)
 196                # dereference source url relative to parent's url
 197                realrepo=$(resolve_relative_url "$repo") || exit
 198                ;;
 199        *:*|/*)
 200                # absolute url
 201                realrepo=$repo
 202                ;;
 203        *)
 204                die "repo URL: '$repo' must be absolute or begin with ./|../"
 205        ;;
 206        esac
 207
 208        # normalize path:
 209        # multiple //; leading ./; /./; /../; trailing /
 210        path=$(printf '%s/\n' "$path" |
 211                sed -e '
 212                        s|//*|/|g
 213                        s|^\(\./\)*||
 214                        s|/\./|/|g
 215                        :start
 216                        s|\([^/]*\)/\.\./||
 217                        tstart
 218                        s|/*$||
 219                ')
 220        git ls-files --error-unmatch "$path" > /dev/null 2>&1 &&
 221        die "'$path' already exists in the index"
 222
 223        if test -z "$force" && ! git add --dry-run --ignore-missing "$path" > /dev/null 2>&1
 224        then
 225                echo >&2 "The following path is ignored by one of your .gitignore files:" &&
 226                echo >&2 $path &&
 227                echo >&2 "Use -f if you really want to add it."
 228                exit 1
 229        fi
 230
 231        # perhaps the path exists and is already a git repo, else clone it
 232        if test -e "$path"
 233        then
 234                if test -d "$path"/.git -o -f "$path"/.git
 235                then
 236                        echo "Adding existing repo at '$path' to the index"
 237                else
 238                        die "'$path' already exists and is not a valid git repo"
 239                fi
 240
 241                case "$repo" in
 242                ./*|../*)
 243                        url=$(resolve_relative_url "$repo") || exit
 244                    ;;
 245                *)
 246                        url="$repo"
 247                        ;;
 248                esac
 249                git config submodule."$path".url "$url"
 250        else
 251
 252                module_clone "$path" "$realrepo" "$reference" || exit
 253                (
 254                        clear_local_git_env
 255                        cd "$path" &&
 256                        # ash fails to wordsplit ${branch:+-b "$branch"...}
 257                        case "$branch" in
 258                        '') git checkout -f -q ;;
 259                        ?*) git checkout -f -q -B "$branch" "origin/$branch" ;;
 260                        esac
 261                ) || die "Unable to checkout submodule '$path'"
 262        fi
 263
 264        git add $force "$path" ||
 265        die "Failed to add submodule '$path'"
 266
 267        git config -f .gitmodules submodule."$path".path "$path" &&
 268        git config -f .gitmodules submodule."$path".url "$repo" &&
 269        git add --force .gitmodules ||
 270        die "Failed to register submodule '$path'"
 271}
 272
 273#
 274# Execute an arbitrary command sequence in each checked out
 275# submodule
 276#
 277# $@ = command to execute
 278#
 279cmd_foreach()
 280{
 281        # parse $args after "submodule ... foreach".
 282        while test $# -ne 0
 283        do
 284                case "$1" in
 285                -q|--quiet)
 286                        GIT_QUIET=1
 287                        ;;
 288                --recursive)
 289                        recursive=1
 290                        ;;
 291                -*)
 292                        usage
 293                        ;;
 294                *)
 295                        break
 296                        ;;
 297                esac
 298                shift
 299        done
 300
 301        toplevel=$(pwd)
 302
 303        module_list |
 304        while read mode sha1 stage path
 305        do
 306                if test -e "$path"/.git
 307                then
 308                        say "Entering '$prefix$path'"
 309                        name=$(module_name "$path")
 310                        (
 311                                prefix="$prefix$path/"
 312                                clear_local_git_env
 313                                cd "$path" &&
 314                                eval "$@" &&
 315                                if test -n "$recursive"
 316                                then
 317                                        cmd_foreach "--recursive" "$@"
 318                                fi
 319                        ) ||
 320                        die "Stopping at '$path'; script returned non-zero status."
 321                fi
 322        done
 323}
 324
 325#
 326# Register submodules in .git/config
 327#
 328# $@ = requested paths (default to all)
 329#
 330cmd_init()
 331{
 332        # parse $args after "submodule ... init".
 333        while test $# -ne 0
 334        do
 335                case "$1" in
 336                -q|--quiet)
 337                        GIT_QUIET=1
 338                        ;;
 339                --)
 340                        shift
 341                        break
 342                        ;;
 343                -*)
 344                        usage
 345                        ;;
 346                *)
 347                        break
 348                        ;;
 349                esac
 350                shift
 351        done
 352
 353        module_list "$@" |
 354        while read mode sha1 stage path
 355        do
 356                # Skip already registered paths
 357                name=$(module_name "$path") || exit
 358                url=$(git config submodule."$name".url)
 359                test -z "$url" || continue
 360
 361                url=$(git config -f .gitmodules submodule."$name".url)
 362                test -z "$url" &&
 363                die "No url found for submodule path '$path' in .gitmodules"
 364
 365                # Possibly a url relative to parent
 366                case "$url" in
 367                ./*|../*)
 368                        url=$(resolve_relative_url "$url") || exit
 369                        ;;
 370                esac
 371
 372                git config submodule."$name".url "$url" ||
 373                die "Failed to register url for submodule path '$path'"
 374
 375                upd="$(git config -f .gitmodules submodule."$name".update)"
 376                test -z "$upd" ||
 377                git config submodule."$name".update "$upd" ||
 378                die "Failed to register update mode for submodule path '$path'"
 379
 380                say "Submodule '$name' ($url) registered for path '$path'"
 381        done
 382}
 383
 384#
 385# Update each submodule path to correct revision, using clone and checkout as needed
 386#
 387# $@ = requested paths (default to all)
 388#
 389cmd_update()
 390{
 391        # parse $args after "submodule ... update".
 392        orig_flags=
 393        while test $# -ne 0
 394        do
 395                case "$1" in
 396                -q|--quiet)
 397                        GIT_QUIET=1
 398                        ;;
 399                -i|--init)
 400                        init=1
 401                        ;;
 402                -N|--no-fetch)
 403                        nofetch=1
 404                        ;;
 405                -r|--rebase)
 406                        update="rebase"
 407                        ;;
 408                --reference)
 409                        case "$2" in '') usage ;; esac
 410                        reference="--reference=$2"
 411                        orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 412                        shift
 413                        ;;
 414                --reference=*)
 415                        reference="$1"
 416                        ;;
 417                -m|--merge)
 418                        update="merge"
 419                        ;;
 420                --recursive)
 421                        recursive=1
 422                        ;;
 423                --)
 424                        shift
 425                        break
 426                        ;;
 427                -*)
 428                        usage
 429                        ;;
 430                *)
 431                        break
 432                        ;;
 433                esac
 434                orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 435                shift
 436        done
 437
 438        if test -n "$init"
 439        then
 440                cmd_init "--" "$@" || return
 441        fi
 442
 443        cloned_modules=
 444        module_list "$@" |
 445        while read mode sha1 stage path
 446        do
 447                if test "$stage" = U
 448                then
 449                        echo >&2 "Skipping unmerged submodule $path"
 450                        continue
 451                fi
 452                name=$(module_name "$path") || exit
 453                url=$(git config submodule."$name".url)
 454                update_module=$(git config submodule."$name".update)
 455                if test -z "$url"
 456                then
 457                        # Only mention uninitialized submodules when its
 458                        # path have been specified
 459                        test "$#" != "0" &&
 460                        say "Submodule path '$path' not initialized" &&
 461                        say "Maybe you want to use 'update --init'?"
 462                        continue
 463                fi
 464
 465                if ! test -d "$path"/.git -o -f "$path"/.git
 466                then
 467                        module_clone "$path" "$url" "$reference"|| exit
 468                        cloned_modules="$cloned_modules;$name"
 469                        subsha1=
 470                else
 471                        subsha1=$(clear_local_git_env; cd "$path" &&
 472                                git rev-parse --verify HEAD) ||
 473                        die "Unable to find current revision in submodule path '$path'"
 474                fi
 475
 476                if ! test -z "$update"
 477                then
 478                        update_module=$update
 479                fi
 480
 481                if test "$subsha1" != "$sha1"
 482                then
 483                        force=
 484                        if test -z "$subsha1"
 485                        then
 486                                force="-f"
 487                        fi
 488
 489                        if test -z "$nofetch"
 490                        then
 491                                # Run fetch only if $sha1 isn't present or it
 492                                # is not reachable from a ref.
 493                                (clear_local_git_env; cd "$path" &&
 494                                        ((rev=$(git rev-list -n 1 $sha1 --not --all 2>/dev/null) &&
 495                                         test -z "$rev") || git-fetch)) ||
 496                                die "Unable to fetch in submodule path '$path'"
 497                        fi
 498
 499                        # Is this something we just cloned?
 500                        case ";$cloned_modules;" in
 501                        *";$name;"*)
 502                                # then there is no local change to integrate
 503                                update_module= ;;
 504                        esac
 505
 506                        case "$update_module" in
 507                        rebase)
 508                                command="git rebase"
 509                                action="rebase"
 510                                msg="rebased onto"
 511                                ;;
 512                        merge)
 513                                command="git merge"
 514                                action="merge"
 515                                msg="merged in"
 516                                ;;
 517                        *)
 518                                command="git checkout $force -q"
 519                                action="checkout"
 520                                msg="checked out"
 521                                ;;
 522                        esac
 523
 524                        (clear_local_git_env; cd "$path" && $command "$sha1") ||
 525                        die "Unable to $action '$sha1' in submodule path '$path'"
 526                        say "Submodule path '$path': $msg '$sha1'"
 527                fi
 528
 529                if test -n "$recursive"
 530                then
 531                        (clear_local_git_env; cd "$path" && eval cmd_update "$orig_flags") ||
 532                        die "Failed to recurse into submodule path '$path'"
 533                fi
 534        done
 535}
 536
 537set_name_rev () {
 538        revname=$( (
 539                clear_local_git_env
 540                cd "$1" && {
 541                        git describe "$2" 2>/dev/null ||
 542                        git describe --tags "$2" 2>/dev/null ||
 543                        git describe --contains "$2" 2>/dev/null ||
 544                        git describe --all --always "$2"
 545                }
 546        ) )
 547        test -z "$revname" || revname=" ($revname)"
 548}
 549#
 550# Show commit summary for submodules in index or working tree
 551#
 552# If '--cached' is given, show summary between index and given commit,
 553# or between working tree and given commit
 554#
 555# $@ = [commit (default 'HEAD'),] requested paths (default all)
 556#
 557cmd_summary() {
 558        summary_limit=-1
 559        for_status=
 560        diff_cmd=diff-index
 561
 562        # parse $args after "submodule ... summary".
 563        while test $# -ne 0
 564        do
 565                case "$1" in
 566                --cached)
 567                        cached="$1"
 568                        ;;
 569                --files)
 570                        files="$1"
 571                        ;;
 572                --for-status)
 573                        for_status="$1"
 574                        ;;
 575                -n|--summary-limit)
 576                        if summary_limit=$(($2 + 0)) 2>/dev/null && test "$summary_limit" = "$2"
 577                        then
 578                                :
 579                        else
 580                                usage
 581                        fi
 582                        shift
 583                        ;;
 584                --)
 585                        shift
 586                        break
 587                        ;;
 588                -*)
 589                        usage
 590                        ;;
 591                *)
 592                        break
 593                        ;;
 594                esac
 595                shift
 596        done
 597
 598        test $summary_limit = 0 && return
 599
 600        if rev=$(git rev-parse -q --verify --default HEAD ${1+"$1"})
 601        then
 602                head=$rev
 603                test $# = 0 || shift
 604        elif test -z "$1" -o "$1" = "HEAD"
 605        then
 606                # before the first commit: compare with an empty tree
 607                head=$(git hash-object -w -t tree --stdin </dev/null)
 608                test -z "$1" || shift
 609        else
 610                head="HEAD"
 611        fi
 612
 613        if [ -n "$files" ]
 614        then
 615                test -n "$cached" &&
 616                die "--cached cannot be used with --files"
 617                diff_cmd=diff-files
 618                head=
 619        fi
 620
 621        cd_to_toplevel
 622        # Get modified modules cared by user
 623        modules=$(git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- "$@" |
 624                sane_egrep '^:([0-7]* )?160000' |
 625                while read mod_src mod_dst sha1_src sha1_dst status name
 626                do
 627                        # Always show modules deleted or type-changed (blob<->module)
 628                        test $status = D -o $status = T && echo "$name" && continue
 629                        # Also show added or modified modules which are checked out
 630                        GIT_DIR="$name/.git" git-rev-parse --git-dir >/dev/null 2>&1 &&
 631                        echo "$name"
 632                done
 633        )
 634
 635        test -z "$modules" && return
 636
 637        git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- $modules |
 638        sane_egrep '^:([0-7]* )?160000' |
 639        cut -c2- |
 640        while read mod_src mod_dst sha1_src sha1_dst status name
 641        do
 642                if test -z "$cached" &&
 643                        test $sha1_dst = 0000000000000000000000000000000000000000
 644                then
 645                        case "$mod_dst" in
 646                        160000)
 647                                sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
 648                                ;;
 649                        100644 | 100755 | 120000)
 650                                sha1_dst=$(git hash-object $name)
 651                                ;;
 652                        000000)
 653                                ;; # removed
 654                        *)
 655                                # unexpected type
 656                                echo >&2 "unexpected mode $mod_dst"
 657                                continue ;;
 658                        esac
 659                fi
 660                missing_src=
 661                missing_dst=
 662
 663                test $mod_src = 160000 &&
 664                ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_src^0 >/dev/null &&
 665                missing_src=t
 666
 667                test $mod_dst = 160000 &&
 668                ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_dst^0 >/dev/null &&
 669                missing_dst=t
 670
 671                total_commits=
 672                case "$missing_src,$missing_dst" in
 673                t,)
 674                        errmsg="  Warn: $name doesn't contain commit $sha1_src"
 675                        ;;
 676                ,t)
 677                        errmsg="  Warn: $name doesn't contain commit $sha1_dst"
 678                        ;;
 679                t,t)
 680                        errmsg="  Warn: $name doesn't contain commits $sha1_src and $sha1_dst"
 681                        ;;
 682                *)
 683                        errmsg=
 684                        total_commits=$(
 685                        if test $mod_src = 160000 -a $mod_dst = 160000
 686                        then
 687                                range="$sha1_src...$sha1_dst"
 688                        elif test $mod_src = 160000
 689                        then
 690                                range=$sha1_src
 691                        else
 692                                range=$sha1_dst
 693                        fi
 694                        GIT_DIR="$name/.git" \
 695                        git rev-list --first-parent $range -- | wc -l
 696                        )
 697                        total_commits=" ($(($total_commits + 0)))"
 698                        ;;
 699                esac
 700
 701                sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
 702                sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
 703                if test $status = T
 704                then
 705                        if test $mod_dst = 160000
 706                        then
 707                                echo "* $name $sha1_abbr_src(blob)->$sha1_abbr_dst(submodule)$total_commits:"
 708                        else
 709                                echo "* $name $sha1_abbr_src(submodule)->$sha1_abbr_dst(blob)$total_commits:"
 710                        fi
 711                else
 712                        echo "* $name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
 713                fi
 714                if test -n "$errmsg"
 715                then
 716                        # Don't give error msg for modification whose dst is not submodule
 717                        # i.e. deleted or changed to blob
 718                        test $mod_dst = 160000 && echo "$errmsg"
 719                else
 720                        if test $mod_src = 160000 -a $mod_dst = 160000
 721                        then
 722                                limit=
 723                                test $summary_limit -gt 0 && limit="-$summary_limit"
 724                                GIT_DIR="$name/.git" \
 725                                git log $limit --pretty='format:  %m %s' \
 726                                --first-parent $sha1_src...$sha1_dst
 727                        elif test $mod_dst = 160000
 728                        then
 729                                GIT_DIR="$name/.git" \
 730                                git log --pretty='format:  > %s' -1 $sha1_dst
 731                        else
 732                                GIT_DIR="$name/.git" \
 733                                git log --pretty='format:  < %s' -1 $sha1_src
 734                        fi
 735                        echo
 736                fi
 737                echo
 738        done |
 739        if test -n "$for_status"; then
 740                if [ -n "$files" ]; then
 741                        echo "# Submodules changed but not updated:"
 742                else
 743                        echo "# Submodule changes to be committed:"
 744                fi
 745                echo "#"
 746                sed -e 's|^|# |' -e 's|^# $|#|'
 747        else
 748                cat
 749        fi
 750}
 751#
 752# List all submodules, prefixed with:
 753#  - submodule not initialized
 754#  + different revision checked out
 755#
 756# If --cached was specified the revision in the index will be printed
 757# instead of the currently checked out revision.
 758#
 759# $@ = requested paths (default to all)
 760#
 761cmd_status()
 762{
 763        # parse $args after "submodule ... status".
 764        orig_flags=
 765        while test $# -ne 0
 766        do
 767                case "$1" in
 768                -q|--quiet)
 769                        GIT_QUIET=1
 770                        ;;
 771                --cached)
 772                        cached=1
 773                        ;;
 774                --recursive)
 775                        recursive=1
 776                        ;;
 777                --)
 778                        shift
 779                        break
 780                        ;;
 781                -*)
 782                        usage
 783                        ;;
 784                *)
 785                        break
 786                        ;;
 787                esac
 788                orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 789                shift
 790        done
 791
 792        module_list "$@" |
 793        while read mode sha1 stage path
 794        do
 795                name=$(module_name "$path") || exit
 796                url=$(git config submodule."$name".url)
 797                displaypath="$prefix$path"
 798                if test "$stage" = U
 799                then
 800                        say "U$sha1 $displaypath"
 801                        continue
 802                fi
 803                if test -z "$url" || ! test -d "$path"/.git -o -f "$path"/.git
 804                then
 805                        say "-$sha1 $displaypath"
 806                        continue;
 807                fi
 808                set_name_rev "$path" "$sha1"
 809                if git diff-files --ignore-submodules=dirty --quiet -- "$path"
 810                then
 811                        say " $sha1 $displaypath$revname"
 812                else
 813                        if test -z "$cached"
 814                        then
 815                                sha1=$(clear_local_git_env; cd "$path" && git rev-parse --verify HEAD)
 816                                set_name_rev "$path" "$sha1"
 817                        fi
 818                        say "+$sha1 $displaypath$revname"
 819                fi
 820
 821                if test -n "$recursive"
 822                then
 823                        (
 824                                prefix="$displaypath/"
 825                                clear_local_git_env
 826                                cd "$path" &&
 827                                eval cmd_status "$orig_args"
 828                        ) ||
 829                        die "Failed to recurse into submodule path '$path'"
 830                fi
 831        done
 832}
 833#
 834# Sync remote urls for submodules
 835# This makes the value for remote.$remote.url match the value
 836# specified in .gitmodules.
 837#
 838cmd_sync()
 839{
 840        while test $# -ne 0
 841        do
 842                case "$1" in
 843                -q|--quiet)
 844                        GIT_QUIET=1
 845                        shift
 846                        ;;
 847                --)
 848                        shift
 849                        break
 850                        ;;
 851                -*)
 852                        usage
 853                        ;;
 854                *)
 855                        break
 856                        ;;
 857                esac
 858        done
 859        cd_to_toplevel
 860        module_list "$@" |
 861        while read mode sha1 stage path
 862        do
 863                name=$(module_name "$path")
 864                url=$(git config -f .gitmodules --get submodule."$name".url)
 865
 866                # Possibly a url relative to parent
 867                case "$url" in
 868                ./*|../*)
 869                        url=$(resolve_relative_url "$url") || exit
 870                        ;;
 871                esac
 872
 873                say "Synchronizing submodule url for '$name'"
 874                git config submodule."$name".url "$url"
 875
 876                if test -e "$path"/.git
 877                then
 878                (
 879                        clear_local_git_env
 880                        cd "$path"
 881                        remote=$(get_default_remote)
 882                        git config remote."$remote".url "$url"
 883                )
 884                fi
 885        done
 886}
 887
 888# This loop parses the command line arguments to find the
 889# subcommand name to dispatch.  Parsing of the subcommand specific
 890# options are primarily done by the subcommand implementations.
 891# Subcommand specific options such as --branch and --cached are
 892# parsed here as well, for backward compatibility.
 893
 894while test $# != 0 && test -z "$command"
 895do
 896        case "$1" in
 897        add | foreach | init | update | status | summary | sync)
 898                command=$1
 899                ;;
 900        -q|--quiet)
 901                GIT_QUIET=1
 902                ;;
 903        -b|--branch)
 904                case "$2" in
 905                '')
 906                        usage
 907                        ;;
 908                esac
 909                branch="$2"; shift
 910                ;;
 911        --cached)
 912                cached="$1"
 913                ;;
 914        --)
 915                break
 916                ;;
 917        -*)
 918                usage
 919                ;;
 920        *)
 921                break
 922                ;;
 923        esac
 924        shift
 925done
 926
 927# No command word defaults to "status"
 928test -n "$command" || command=status
 929
 930# "-b branch" is accepted only by "add"
 931if test -n "$branch" && test "$command" != add
 932then
 933        usage
 934fi
 935
 936# "--cached" is accepted only by "status" and "summary"
 937if test -n "$cached" && test "$command" != status -a "$command" != summary
 938then
 939        usage
 940fi
 941
 942"cmd_$command" "$@"