c405caaa0ee6998c4bdd39f97c7d53edcdcbea48
   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] [-f|--force] [--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: $dashless [--quiet] sync [--] [<path>...]"
  15OPTIONS_SPEC=
  16. git-sh-setup
  17. git-sh-i18n
  18. git-parse-remote
  19require_work_tree
  20
  21command=
  22branch=
  23force=
  24reference=
  25cached=
  26recursive=
  27init=
  28files=
  29nofetch=
  30update=
  31prefix=
  32
  33# Resolve relative url by appending to parent's url
  34resolve_relative_url ()
  35{
  36        remote=$(get_default_remote)
  37        remoteurl=$(git config "remote.$remote.url") ||
  38                remoteurl=$(pwd) # the repository is its own authoritative upstream
  39        url="$1"
  40        remoteurl=${remoteurl%/}
  41        sep=/
  42        while test -n "$url"
  43        do
  44                case "$url" in
  45                ../*)
  46                        url="${url#../}"
  47                        case "$remoteurl" in
  48                        */*)
  49                                remoteurl="${remoteurl%/*}"
  50                                ;;
  51                        *:*)
  52                                remoteurl="${remoteurl%:*}"
  53                                sep=:
  54                                ;;
  55                        *)
  56                                die "$(eval_gettext "cannot strip one component off url '\$remoteurl'")"
  57                                ;;
  58                        esac
  59                        ;;
  60                ./*)
  61                        url="${url#./}"
  62                        ;;
  63                *)
  64                        break;;
  65                esac
  66        done
  67        echo "$remoteurl$sep${url%/}"
  68}
  69
  70#
  71# Get submodule info for registered submodules
  72# $@ = path to limit submodule list
  73#
  74module_list()
  75{
  76        git ls-files --error-unmatch --stage -- "$@" |
  77        perl -e '
  78        my %unmerged = ();
  79        my ($null_sha1) = ("0" x 40);
  80        while (<STDIN>) {
  81                chomp;
  82                my ($mode, $sha1, $stage, $path) =
  83                        /^([0-7]+) ([0-9a-f]{40}) ([0-3])\t(.*)$/;
  84                next unless $mode eq "160000";
  85                if ($stage ne "0") {
  86                        if (!$unmerged{$path}++) {
  87                                print "$mode $null_sha1 U\t$path\n";
  88                        }
  89                        next;
  90                }
  91                print "$_\n";
  92        }
  93        '
  94}
  95
  96#
  97# Map submodule path to submodule name
  98#
  99# $1 = path
 100#
 101module_name()
 102{
 103        # Do we have "submodule.<something>.path = $1" defined in .gitmodules file?
 104        re=$(printf '%s\n' "$1" | sed -e 's/[].[^$\\*]/\\&/g')
 105        name=$( git config -f .gitmodules --get-regexp '^submodule\..*\.path$' |
 106                sed -n -e 's|^submodule\.\(.*\)\.path '"$re"'$|\1|p' )
 107        test -z "$name" &&
 108        die "$(eval_gettext "No submodule mapping found in .gitmodules for path '\$path'")"
 109        echo "$name"
 110}
 111
 112#
 113# Clone a submodule
 114#
 115# Prior to calling, cmd_update checks that a possibly existing
 116# path is not a git repository.
 117# Likewise, cmd_add checks that path does not exist at all,
 118# since it is the location of a new submodule.
 119#
 120module_clone()
 121{
 122        path=$1
 123        url=$2
 124        reference="$3"
 125        quiet=
 126        if test -n "$GIT_QUIET"
 127        then
 128                quiet=-q
 129        fi
 130
 131        gitdir=
 132        gitdir_base=
 133        name=$(module_name "$path" 2>/dev/null)
 134        test -n "$name" || name="$path"
 135        base_path=$(dirname "$path")
 136
 137        gitdir=$(git rev-parse --git-dir)
 138        gitdir_base="$gitdir/modules/$base_path"
 139        gitdir="$gitdir/modules/$path"
 140
 141        case $gitdir in
 142        /*)
 143                a="$(cd_to_toplevel && pwd)/"
 144                b=$gitdir
 145                while [ "$b" ] && [ "${a%%/*}" = "${b%%/*}" ]
 146                do
 147                        a=${a#*/} b=${b#*/};
 148                done
 149
 150                rel="$a$name"
 151                rel=`echo $rel | sed -e 's|[^/]*|..|g'`
 152                rel_gitdir="$rel/$b"
 153                ;;
 154        *)
 155                rel=`echo $name | sed -e 's|[^/]*|..|g'`
 156                rel_gitdir="$rel/$gitdir"
 157                ;;
 158        esac
 159
 160        if test -d "$gitdir"
 161        then
 162                mkdir -p "$path"
 163                rm -f "$gitdir/index"
 164        else
 165                mkdir -p "$gitdir_base"
 166                git clone $quiet -n ${reference:+"$reference"} \
 167                        --separate-git-dir "$gitdir" "$url" "$path" ||
 168                die "$(eval_gettext "Clone of '\$url' into submodule path '\$path' failed")"
 169        fi
 170
 171        echo "gitdir: $rel_gitdir" >"$path/.git"
 172
 173        a=$(cd "$gitdir" && pwd)/
 174        b=$(cd "$path" && pwd)/
 175        # Remove all common leading directories after a sanity check
 176        if test "${a#$b}" != "$a" || test "${b#$a}" != "$b"; then
 177                die "$(eval_gettext "Gitdir '\$a' is part of the submodule path '\$b' or vice versa")"
 178        fi
 179        while test "${a%%/*}" = "${b%%/*}"
 180        do
 181                a=${a#*/}
 182                b=${b#*/}
 183        done
 184        # Now chop off the trailing '/'s that were added in the beginning
 185        a=${a%/}
 186        b=${b%/}
 187
 188        rel=$(echo $a | sed -e 's|[^/]*|..|g')
 189        (clear_local_git_env; cd "$path" && GIT_WORK_TREE=. git config core.worktree "$rel/$b")
 190}
 191
 192#
 193# Add a new submodule to the working tree, .gitmodules and the index
 194#
 195# $@ = repo path
 196#
 197# optional branch is stored in global branch variable
 198#
 199cmd_add()
 200{
 201        # parse $args after "submodule ... add".
 202        while test $# -ne 0
 203        do
 204                case "$1" in
 205                -b | --branch)
 206                        case "$2" in '') usage ;; esac
 207                        branch=$2
 208                        shift
 209                        ;;
 210                -f | --force)
 211                        force=$1
 212                        ;;
 213                -q|--quiet)
 214                        GIT_QUIET=1
 215                        ;;
 216                --reference)
 217                        case "$2" in '') usage ;; esac
 218                        reference="--reference=$2"
 219                        shift
 220                        ;;
 221                --reference=*)
 222                        reference="$1"
 223                        shift
 224                        ;;
 225                --)
 226                        shift
 227                        break
 228                        ;;
 229                -*)
 230                        usage
 231                        ;;
 232                *)
 233                        break
 234                        ;;
 235                esac
 236                shift
 237        done
 238
 239        repo=$1
 240        path=$2
 241
 242        if test -z "$path"; then
 243                path=$(echo "$repo" |
 244                        sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
 245        fi
 246
 247        if test -z "$repo" -o -z "$path"; then
 248                usage
 249        fi
 250
 251        # assure repo is absolute or relative to parent
 252        case "$repo" in
 253        ./*|../*)
 254                # dereference source url relative to parent's url
 255                realrepo=$(resolve_relative_url "$repo") || exit
 256                ;;
 257        *:*|/*)
 258                # absolute url
 259                realrepo=$repo
 260                ;;
 261        *)
 262                die "$(eval_gettext "repo URL: '\$repo' must be absolute or begin with ./|../")"
 263        ;;
 264        esac
 265
 266        # normalize path:
 267        # multiple //; leading ./; /./; /../; trailing /
 268        path=$(printf '%s/\n' "$path" |
 269                sed -e '
 270                        s|//*|/|g
 271                        s|^\(\./\)*||
 272                        s|/\./|/|g
 273                        :start
 274                        s|\([^/]*\)/\.\./||
 275                        tstart
 276                        s|/*$||
 277                ')
 278        git ls-files --error-unmatch "$path" > /dev/null 2>&1 &&
 279        die "$(eval_gettext "'\$path' already exists in the index")"
 280
 281        if test -z "$force" && ! git add --dry-run --ignore-missing "$path" > /dev/null 2>&1
 282        then
 283                eval_gettextln "The following path is ignored by one of your .gitignore files:
 284\$path
 285Use -f if you really want to add it." >&2
 286                exit 1
 287        fi
 288
 289        # perhaps the path exists and is already a git repo, else clone it
 290        if test -e "$path"
 291        then
 292                if test -d "$path"/.git -o -f "$path"/.git
 293                then
 294                        eval_gettextln "Adding existing repo at '\$path' to the index"
 295                else
 296                        die "$(eval_gettext "'\$path' already exists and is not a valid git repo")"
 297                fi
 298
 299        else
 300
 301                module_clone "$path" "$realrepo" "$reference" || exit
 302                (
 303                        clear_local_git_env
 304                        cd "$path" &&
 305                        # ash fails to wordsplit ${branch:+-b "$branch"...}
 306                        case "$branch" in
 307                        '') git checkout -f -q ;;
 308                        ?*) git checkout -f -q -B "$branch" "origin/$branch" ;;
 309                        esac
 310                ) || die "$(eval_gettext "Unable to checkout submodule '\$path'")"
 311        fi
 312        git config submodule."$path".url "$realrepo"
 313
 314        git add $force "$path" ||
 315        die "$(eval_gettext "Failed to add submodule '\$path'")"
 316
 317        git config -f .gitmodules submodule."$path".path "$path" &&
 318        git config -f .gitmodules submodule."$path".url "$repo" &&
 319        git add --force .gitmodules ||
 320        die "$(eval_gettext "Failed to register submodule '\$path'")"
 321}
 322
 323#
 324# Execute an arbitrary command sequence in each checked out
 325# submodule
 326#
 327# $@ = command to execute
 328#
 329cmd_foreach()
 330{
 331        # parse $args after "submodule ... foreach".
 332        while test $# -ne 0
 333        do
 334                case "$1" in
 335                -q|--quiet)
 336                        GIT_QUIET=1
 337                        ;;
 338                --recursive)
 339                        recursive=1
 340                        ;;
 341                -*)
 342                        usage
 343                        ;;
 344                *)
 345                        break
 346                        ;;
 347                esac
 348                shift
 349        done
 350
 351        toplevel=$(pwd)
 352
 353        # dup stdin so that it can be restored when running the external
 354        # command in the subshell (and a recursive call to this function)
 355        exec 3<&0
 356
 357        module_list |
 358        while read mode sha1 stage path
 359        do
 360                if test -e "$path"/.git
 361                then
 362                        say "$(eval_gettext "Entering '\$prefix\$path'")"
 363                        name=$(module_name "$path")
 364                        (
 365                                prefix="$prefix$path/"
 366                                clear_local_git_env
 367                                cd "$path" &&
 368                                eval "$@" &&
 369                                if test -n "$recursive"
 370                                then
 371                                        cmd_foreach "--recursive" "$@"
 372                                fi
 373                        ) <&3 3<&- ||
 374                        die "$(eval_gettext "Stopping at '\$path'; script returned non-zero status.")"
 375                fi
 376        done
 377}
 378
 379#
 380# Register submodules in .git/config
 381#
 382# $@ = requested paths (default to all)
 383#
 384cmd_init()
 385{
 386        # parse $args after "submodule ... init".
 387        while test $# -ne 0
 388        do
 389                case "$1" in
 390                -q|--quiet)
 391                        GIT_QUIET=1
 392                        ;;
 393                --)
 394                        shift
 395                        break
 396                        ;;
 397                -*)
 398                        usage
 399                        ;;
 400                *)
 401                        break
 402                        ;;
 403                esac
 404                shift
 405        done
 406
 407        module_list "$@" |
 408        while read mode sha1 stage path
 409        do
 410                # Skip already registered paths
 411                name=$(module_name "$path") || exit
 412                if test -z "$(git config "submodule.$name.url")"
 413                then
 414                        url=$(git config -f .gitmodules submodule."$name".url)
 415                        test -z "$url" &&
 416                        die "$(eval_gettext "No url found for submodule path '\$path' in .gitmodules")"
 417
 418                        # Possibly a url relative to parent
 419                        case "$url" in
 420                        ./*|../*)
 421                                url=$(resolve_relative_url "$url") || exit
 422                                ;;
 423                        esac
 424                        git config submodule."$name".url "$url" ||
 425                        die "$(eval_gettext "Failed to register url for submodule path '\$path'")"
 426                fi
 427
 428                # Copy "update" setting when it is not set yet
 429                upd="$(git config -f .gitmodules submodule."$name".update)"
 430                test -z "$upd" ||
 431                test -n "$(git config submodule."$name".update)" ||
 432                git config submodule."$name".update "$upd" ||
 433                die "$(eval_gettext "Failed to register update mode for submodule path '\$path'")"
 434
 435                say "$(eval_gettext "Submodule '\$name' (\$url) registered for path '\$path'")"
 436        done
 437}
 438
 439#
 440# Update each submodule path to correct revision, using clone and checkout as needed
 441#
 442# $@ = requested paths (default to all)
 443#
 444cmd_update()
 445{
 446        # parse $args after "submodule ... update".
 447        orig_flags=
 448        while test $# -ne 0
 449        do
 450                case "$1" in
 451                -q|--quiet)
 452                        GIT_QUIET=1
 453                        ;;
 454                -i|--init)
 455                        init=1
 456                        ;;
 457                -N|--no-fetch)
 458                        nofetch=1
 459                        ;;
 460                -f|--force)
 461                        force=$1
 462                        ;;
 463                -r|--rebase)
 464                        update="rebase"
 465                        ;;
 466                --reference)
 467                        case "$2" in '') usage ;; esac
 468                        reference="--reference=$2"
 469                        orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 470                        shift
 471                        ;;
 472                --reference=*)
 473                        reference="$1"
 474                        ;;
 475                -m|--merge)
 476                        update="merge"
 477                        ;;
 478                --recursive)
 479                        recursive=1
 480                        ;;
 481                --checkout)
 482                        update="checkout"
 483                        ;;
 484                --)
 485                        shift
 486                        break
 487                        ;;
 488                -*)
 489                        usage
 490                        ;;
 491                *)
 492                        break
 493                        ;;
 494                esac
 495                orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 496                shift
 497        done
 498
 499        if test -n "$init"
 500        then
 501                cmd_init "--" "$@" || return
 502        fi
 503
 504        cloned_modules=
 505        module_list "$@" | {
 506        err=
 507        while read mode sha1 stage path
 508        do
 509                if test "$stage" = U
 510                then
 511                        echo >&2 "Skipping unmerged submodule $path"
 512                        continue
 513                fi
 514                name=$(module_name "$path") || exit
 515                url=$(git config submodule."$name".url)
 516                if ! test -z "$update"
 517                then
 518                        update_module=$update
 519                else
 520                        update_module=$(git config submodule."$name".update)
 521                fi
 522
 523                if test "$update_module" = "none"
 524                then
 525                        echo "Skipping submodule '$path'"
 526                        continue
 527                fi
 528
 529                if test -z "$url"
 530                then
 531                        # Only mention uninitialized submodules when its
 532                        # path have been specified
 533                        test "$#" != "0" &&
 534                        say "$(eval_gettext "Submodule path '\$path' not initialized
 535Maybe you want to use 'update --init'?")"
 536                        continue
 537                fi
 538
 539                if ! test -d "$path"/.git -o -f "$path"/.git
 540                then
 541                        module_clone "$path" "$url" "$reference"|| exit
 542                        cloned_modules="$cloned_modules;$name"
 543                        subsha1=
 544                else
 545                        subsha1=$(clear_local_git_env; cd "$path" &&
 546                                git rev-parse --verify HEAD) ||
 547                        die "$(eval_gettext "Unable to find current revision in submodule path '\$path'")"
 548                fi
 549
 550                if test "$subsha1" != "$sha1"
 551                then
 552                        subforce=$force
 553                        # If we don't already have a -f flag and the submodule has never been checked out
 554                        if test -z "$subsha1" -a -z "$force"
 555                        then
 556                                subforce="-f"
 557                        fi
 558
 559                        if test -z "$nofetch"
 560                        then
 561                                # Run fetch only if $sha1 isn't present or it
 562                                # is not reachable from a ref.
 563                                (clear_local_git_env; cd "$path" &&
 564                                        ( (rev=$(git rev-list -n 1 $sha1 --not --all 2>/dev/null) &&
 565                                         test -z "$rev") || git-fetch)) ||
 566                                die "$(eval_gettext "Unable to fetch in submodule path '\$path'")"
 567                        fi
 568
 569                        # Is this something we just cloned?
 570                        case ";$cloned_modules;" in
 571                        *";$name;"*)
 572                                # then there is no local change to integrate
 573                                update_module= ;;
 574                        esac
 575
 576                        must_die_on_failure=
 577                        case "$update_module" in
 578                        rebase)
 579                                command="git rebase"
 580                                die_msg="$(eval_gettext "Unable to rebase '\$sha1' in submodule path '\$path'")"
 581                                say_msg="$(eval_gettext "Submodule path '\$path': rebased into '\$sha1'")"
 582                                must_die_on_failure=yes
 583                                ;;
 584                        merge)
 585                                command="git merge"
 586                                die_msg="$(eval_gettext "Unable to merge '\$sha1' in submodule path '\$path'")"
 587                                say_msg="$(eval_gettext "Submodule path '\$path': merged in '\$sha1'")"
 588                                must_die_on_failure=yes
 589                                ;;
 590                        *)
 591                                command="git checkout $subforce -q"
 592                                die_msg="$(eval_gettext "Unable to checkout '\$sha1' in submodule path '\$path'")"
 593                                say_msg="$(eval_gettext "Submodule path '\$path': checked out '\$sha1'")"
 594                                ;;
 595                        esac
 596
 597                        if (clear_local_git_env; cd "$path" && $command "$sha1")
 598                        then
 599                                say "$say_msg"
 600                        elif test -n "$must_die_on_failure"
 601                        then
 602                                die_with_status 2 "$die_msg"
 603                        else
 604                                err="${err};$die_msg"
 605                                continue
 606                        fi
 607                fi
 608
 609                if test -n "$recursive"
 610                then
 611                        (clear_local_git_env; cd "$path" && eval cmd_update "$orig_flags")
 612                        res=$?
 613                        if test $res -gt 0
 614                        then
 615                                die_msg="$(eval_gettext "Failed to recurse into submodule path '\$path'")"
 616                                if test $res -eq 1
 617                                then
 618                                        err="${err};$die_msg"
 619                                        continue
 620                                else
 621                                        die_with_status $res "$die_msg"
 622                                fi
 623                        fi
 624                fi
 625        done
 626
 627        if test -n "$err"
 628        then
 629                OIFS=$IFS
 630                IFS=';'
 631                for e in $err
 632                do
 633                        if test -n "$e"
 634                        then
 635                                echo >&2 "$e"
 636                        fi
 637                done
 638                IFS=$OIFS
 639                exit 1
 640        fi
 641        }
 642}
 643
 644set_name_rev () {
 645        revname=$( (
 646                clear_local_git_env
 647                cd "$1" && {
 648                        git describe "$2" 2>/dev/null ||
 649                        git describe --tags "$2" 2>/dev/null ||
 650                        git describe --contains "$2" 2>/dev/null ||
 651                        git describe --all --always "$2"
 652                }
 653        ) )
 654        test -z "$revname" || revname=" ($revname)"
 655}
 656#
 657# Show commit summary for submodules in index or working tree
 658#
 659# If '--cached' is given, show summary between index and given commit,
 660# or between working tree and given commit
 661#
 662# $@ = [commit (default 'HEAD'),] requested paths (default all)
 663#
 664cmd_summary() {
 665        summary_limit=-1
 666        for_status=
 667        diff_cmd=diff-index
 668
 669        # parse $args after "submodule ... summary".
 670        while test $# -ne 0
 671        do
 672                case "$1" in
 673                --cached)
 674                        cached="$1"
 675                        ;;
 676                --files)
 677                        files="$1"
 678                        ;;
 679                --for-status)
 680                        for_status="$1"
 681                        ;;
 682                -n|--summary-limit)
 683                        if summary_limit=$(($2 + 0)) 2>/dev/null && test "$summary_limit" = "$2"
 684                        then
 685                                :
 686                        else
 687                                usage
 688                        fi
 689                        shift
 690                        ;;
 691                --)
 692                        shift
 693                        break
 694                        ;;
 695                -*)
 696                        usage
 697                        ;;
 698                *)
 699                        break
 700                        ;;
 701                esac
 702                shift
 703        done
 704
 705        test $summary_limit = 0 && return
 706
 707        if rev=$(git rev-parse -q --verify --default HEAD ${1+"$1"})
 708        then
 709                head=$rev
 710                test $# = 0 || shift
 711        elif test -z "$1" -o "$1" = "HEAD"
 712        then
 713                # before the first commit: compare with an empty tree
 714                head=$(git hash-object -w -t tree --stdin </dev/null)
 715                test -z "$1" || shift
 716        else
 717                head="HEAD"
 718        fi
 719
 720        if [ -n "$files" ]
 721        then
 722                test -n "$cached" &&
 723                die "$(gettext -- "--cached cannot be used with --files")"
 724                diff_cmd=diff-files
 725                head=
 726        fi
 727
 728        cd_to_toplevel
 729        # Get modified modules cared by user
 730        modules=$(git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- "$@" |
 731                sane_egrep '^:([0-7]* )?160000' |
 732                while read mod_src mod_dst sha1_src sha1_dst status name
 733                do
 734                        # Always show modules deleted or type-changed (blob<->module)
 735                        test $status = D -o $status = T && echo "$name" && continue
 736                        # Also show added or modified modules which are checked out
 737                        GIT_DIR="$name/.git" git-rev-parse --git-dir >/dev/null 2>&1 &&
 738                        echo "$name"
 739                done
 740        )
 741
 742        test -z "$modules" && return
 743
 744        git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- $modules |
 745        sane_egrep '^:([0-7]* )?160000' |
 746        cut -c2- |
 747        while read mod_src mod_dst sha1_src sha1_dst status name
 748        do
 749                if test -z "$cached" &&
 750                        test $sha1_dst = 0000000000000000000000000000000000000000
 751                then
 752                        case "$mod_dst" in
 753                        160000)
 754                                sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
 755                                ;;
 756                        100644 | 100755 | 120000)
 757                                sha1_dst=$(git hash-object $name)
 758                                ;;
 759                        000000)
 760                                ;; # removed
 761                        *)
 762                                # unexpected type
 763                                eval_gettextln "unexpected mode \$mod_dst" >&2
 764                                continue ;;
 765                        esac
 766                fi
 767                missing_src=
 768                missing_dst=
 769
 770                test $mod_src = 160000 &&
 771                ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_src^0 >/dev/null &&
 772                missing_src=t
 773
 774                test $mod_dst = 160000 &&
 775                ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_dst^0 >/dev/null &&
 776                missing_dst=t
 777
 778                total_commits=
 779                case "$missing_src,$missing_dst" in
 780                t,)
 781                        errmsg="$(eval_gettext "  Warn: \$name doesn't contain commit \$sha1_src")"
 782                        ;;
 783                ,t)
 784                        errmsg="$(eval_gettext "  Warn: \$name doesn't contain commit \$sha1_dst")"
 785                        ;;
 786                t,t)
 787                        errmsg="$(eval_gettext "  Warn: \$name doesn't contain commits \$sha1_src and \$sha1_dst")"
 788                        ;;
 789                *)
 790                        errmsg=
 791                        total_commits=$(
 792                        if test $mod_src = 160000 -a $mod_dst = 160000
 793                        then
 794                                range="$sha1_src...$sha1_dst"
 795                        elif test $mod_src = 160000
 796                        then
 797                                range=$sha1_src
 798                        else
 799                                range=$sha1_dst
 800                        fi
 801                        GIT_DIR="$name/.git" \
 802                        git rev-list --first-parent $range -- | wc -l
 803                        )
 804                        total_commits=" ($(($total_commits + 0)))"
 805                        ;;
 806                esac
 807
 808                sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
 809                sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
 810                if test $status = T
 811                then
 812                        blob="$(gettext "blob")"
 813                        submodule="$(gettext "submodule")"
 814                        if test $mod_dst = 160000
 815                        then
 816                                echo "* $name $sha1_abbr_src($blob)->$sha1_abbr_dst($submodule)$total_commits:"
 817                        else
 818                                echo "* $name $sha1_abbr_src($submodule)->$sha1_abbr_dst($blob)$total_commits:"
 819                        fi
 820                else
 821                        echo "* $name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
 822                fi
 823                if test -n "$errmsg"
 824                then
 825                        # Don't give error msg for modification whose dst is not submodule
 826                        # i.e. deleted or changed to blob
 827                        test $mod_dst = 160000 && echo "$errmsg"
 828                else
 829                        if test $mod_src = 160000 -a $mod_dst = 160000
 830                        then
 831                                limit=
 832                                test $summary_limit -gt 0 && limit="-$summary_limit"
 833                                GIT_DIR="$name/.git" \
 834                                git log $limit --pretty='format:  %m %s' \
 835                                --first-parent $sha1_src...$sha1_dst
 836                        elif test $mod_dst = 160000
 837                        then
 838                                GIT_DIR="$name/.git" \
 839                                git log --pretty='format:  > %s' -1 $sha1_dst
 840                        else
 841                                GIT_DIR="$name/.git" \
 842                                git log --pretty='format:  < %s' -1 $sha1_src
 843                        fi
 844                        echo
 845                fi
 846                echo
 847        done |
 848        if test -n "$for_status"; then
 849                if [ -n "$files" ]; then
 850                        gettextln "# Submodules changed but not updated:"
 851                else
 852                        gettextln "# Submodule changes to be committed:"
 853                fi
 854                echo "#"
 855                sed -e 's|^|# |' -e 's|^# $|#|'
 856        else
 857                cat
 858        fi
 859}
 860#
 861# List all submodules, prefixed with:
 862#  - submodule not initialized
 863#  + different revision checked out
 864#
 865# If --cached was specified the revision in the index will be printed
 866# instead of the currently checked out revision.
 867#
 868# $@ = requested paths (default to all)
 869#
 870cmd_status()
 871{
 872        # parse $args after "submodule ... status".
 873        orig_flags=
 874        while test $# -ne 0
 875        do
 876                case "$1" in
 877                -q|--quiet)
 878                        GIT_QUIET=1
 879                        ;;
 880                --cached)
 881                        cached=1
 882                        ;;
 883                --recursive)
 884                        recursive=1
 885                        ;;
 886                --)
 887                        shift
 888                        break
 889                        ;;
 890                -*)
 891                        usage
 892                        ;;
 893                *)
 894                        break
 895                        ;;
 896                esac
 897                orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 898                shift
 899        done
 900
 901        module_list "$@" |
 902        while read mode sha1 stage path
 903        do
 904                name=$(module_name "$path") || exit
 905                url=$(git config submodule."$name".url)
 906                displaypath="$prefix$path"
 907                if test "$stage" = U
 908                then
 909                        say "U$sha1 $displaypath"
 910                        continue
 911                fi
 912                if test -z "$url" || ! test -d "$path"/.git -o -f "$path"/.git
 913                then
 914                        say "-$sha1 $displaypath"
 915                        continue;
 916                fi
 917                set_name_rev "$path" "$sha1"
 918                if git diff-files --ignore-submodules=dirty --quiet -- "$path"
 919                then
 920                        say " $sha1 $displaypath$revname"
 921                else
 922                        if test -z "$cached"
 923                        then
 924                                sha1=$(clear_local_git_env; cd "$path" && git rev-parse --verify HEAD)
 925                                set_name_rev "$path" "$sha1"
 926                        fi
 927                        say "+$sha1 $displaypath$revname"
 928                fi
 929
 930                if test -n "$recursive"
 931                then
 932                        (
 933                                prefix="$displaypath/"
 934                                clear_local_git_env
 935                                cd "$path" &&
 936                                eval cmd_status "$orig_args"
 937                        ) ||
 938                        die "$(eval_gettext "Failed to recurse into submodule path '\$path'")"
 939                fi
 940        done
 941}
 942#
 943# Sync remote urls for submodules
 944# This makes the value for remote.$remote.url match the value
 945# specified in .gitmodules.
 946#
 947cmd_sync()
 948{
 949        while test $# -ne 0
 950        do
 951                case "$1" in
 952                -q|--quiet)
 953                        GIT_QUIET=1
 954                        shift
 955                        ;;
 956                --)
 957                        shift
 958                        break
 959                        ;;
 960                -*)
 961                        usage
 962                        ;;
 963                *)
 964                        break
 965                        ;;
 966                esac
 967        done
 968        cd_to_toplevel
 969        module_list "$@" |
 970        while read mode sha1 stage path
 971        do
 972                name=$(module_name "$path")
 973                url=$(git config -f .gitmodules --get submodule."$name".url)
 974
 975                # Possibly a url relative to parent
 976                case "$url" in
 977                ./*|../*)
 978                        url=$(resolve_relative_url "$url") || exit
 979                        ;;
 980                esac
 981
 982                if git config "submodule.$name.url" >/dev/null 2>/dev/null
 983                then
 984                        say "$(eval_gettext "Synchronizing submodule url for '\$name'")"
 985                        git config submodule."$name".url "$url"
 986
 987                        if test -e "$path"/.git
 988                        then
 989                        (
 990                                clear_local_git_env
 991                                cd "$path"
 992                                remote=$(get_default_remote)
 993                                git config remote."$remote".url "$url"
 994                        )
 995                        fi
 996                fi
 997        done
 998}
 999
1000# This loop parses the command line arguments to find the
1001# subcommand name to dispatch.  Parsing of the subcommand specific
1002# options are primarily done by the subcommand implementations.
1003# Subcommand specific options such as --branch and --cached are
1004# parsed here as well, for backward compatibility.
1005
1006while test $# != 0 && test -z "$command"
1007do
1008        case "$1" in
1009        add | foreach | init | update | status | summary | sync)
1010                command=$1
1011                ;;
1012        -q|--quiet)
1013                GIT_QUIET=1
1014                ;;
1015        -b|--branch)
1016                case "$2" in
1017                '')
1018                        usage
1019                        ;;
1020                esac
1021                branch="$2"; shift
1022                ;;
1023        --cached)
1024                cached="$1"
1025                ;;
1026        --)
1027                break
1028                ;;
1029        -*)
1030                usage
1031                ;;
1032        *)
1033                break
1034                ;;
1035        esac
1036        shift
1037done
1038
1039# No command word defaults to "status"
1040test -n "$command" || command=status
1041
1042# "-b branch" is accepted only by "add"
1043if test -n "$branch" && test "$command" != add
1044then
1045        usage
1046fi
1047
1048# "--cached" is accepted only by "status" and "summary"
1049if test -n "$cached" && test "$command" != status -a "$command" != summary
1050then
1051        usage
1052fi
1053
1054"cmd_$command" "$@"