git-submodule.shon commit add update 'none' flag to disable update of submodule by default (322bb6e)
   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        if test -n "$reference"
 132        then
 133                git-clone $quiet "$reference" -n "$url" "$path"
 134        else
 135                git-clone $quiet -n "$url" "$path"
 136        fi ||
 137        die "$(eval_gettext "Clone of '\$url' into submodule path '\$path' failed")"
 138}
 139
 140#
 141# Add a new submodule to the working tree, .gitmodules and the index
 142#
 143# $@ = repo path
 144#
 145# optional branch is stored in global branch variable
 146#
 147cmd_add()
 148{
 149        # parse $args after "submodule ... add".
 150        while test $# -ne 0
 151        do
 152                case "$1" in
 153                -b | --branch)
 154                        case "$2" in '') usage ;; esac
 155                        branch=$2
 156                        shift
 157                        ;;
 158                -f | --force)
 159                        force=$1
 160                        ;;
 161                -q|--quiet)
 162                        GIT_QUIET=1
 163                        ;;
 164                --reference)
 165                        case "$2" in '') usage ;; esac
 166                        reference="--reference=$2"
 167                        shift
 168                        ;;
 169                --reference=*)
 170                        reference="$1"
 171                        shift
 172                        ;;
 173                --)
 174                        shift
 175                        break
 176                        ;;
 177                -*)
 178                        usage
 179                        ;;
 180                *)
 181                        break
 182                        ;;
 183                esac
 184                shift
 185        done
 186
 187        repo=$1
 188        path=$2
 189
 190        if test -z "$path"; then
 191                path=$(echo "$repo" |
 192                        sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
 193        fi
 194
 195        if test -z "$repo" -o -z "$path"; then
 196                usage
 197        fi
 198
 199        # assure repo is absolute or relative to parent
 200        case "$repo" in
 201        ./*|../*)
 202                # dereference source url relative to parent's url
 203                realrepo=$(resolve_relative_url "$repo") || exit
 204                ;;
 205        *:*|/*)
 206                # absolute url
 207                realrepo=$repo
 208                ;;
 209        *)
 210                die "$(eval_gettext "repo URL: '\$repo' must be absolute or begin with ./|../")"
 211        ;;
 212        esac
 213
 214        # normalize path:
 215        # multiple //; leading ./; /./; /../; trailing /
 216        path=$(printf '%s/\n' "$path" |
 217                sed -e '
 218                        s|//*|/|g
 219                        s|^\(\./\)*||
 220                        s|/\./|/|g
 221                        :start
 222                        s|\([^/]*\)/\.\./||
 223                        tstart
 224                        s|/*$||
 225                ')
 226        git ls-files --error-unmatch "$path" > /dev/null 2>&1 &&
 227        die "$(eval_gettext "'\$path' already exists in the index")"
 228
 229        if test -z "$force" && ! git add --dry-run --ignore-missing "$path" > /dev/null 2>&1
 230        then
 231                (
 232                        eval_gettext "The following path is ignored by one of your .gitignore files:
 233\$path
 234Use -f if you really want to add it." &&
 235                        echo
 236                ) >&2
 237                exit 1
 238        fi
 239
 240        # perhaps the path exists and is already a git repo, else clone it
 241        if test -e "$path"
 242        then
 243                if test -d "$path"/.git -o -f "$path"/.git
 244                then
 245                        eval_gettext "Adding existing repo at '\$path' to the index"; echo
 246                else
 247                        die "$(eval_gettext "'\$path' already exists and is not a valid git repo")"
 248                fi
 249
 250        else
 251
 252                module_clone "$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/$branch" ;;
 260                        esac
 261                ) || die "$(eval_gettext "Unable to checkout submodule '\$path'")"
 262        fi
 263        git config submodule."$path".url "$realrepo"
 264
 265        git add $force "$path" ||
 266        die "$(eval_gettext "Failed to add submodule '\$path'")"
 267
 268        git config -f .gitmodules submodule."$path".path "$path" &&
 269        git config -f .gitmodules submodule."$path".url "$repo" &&
 270        git add --force .gitmodules ||
 271        die "$(eval_gettext "Failed to register submodule '\$path'")"
 272}
 273
 274#
 275# Execute an arbitrary command sequence in each checked out
 276# submodule
 277#
 278# $@ = command to execute
 279#
 280cmd_foreach()
 281{
 282        # parse $args after "submodule ... foreach".
 283        while test $# -ne 0
 284        do
 285                case "$1" in
 286                -q|--quiet)
 287                        GIT_QUIET=1
 288                        ;;
 289                --recursive)
 290                        recursive=1
 291                        ;;
 292                -*)
 293                        usage
 294                        ;;
 295                *)
 296                        break
 297                        ;;
 298                esac
 299                shift
 300        done
 301
 302        toplevel=$(pwd)
 303
 304        # dup stdin so that it can be restored when running the external
 305        # command in the subshell (and a recursive call to this function)
 306        exec 3<&0
 307
 308        module_list |
 309        while read mode sha1 stage path
 310        do
 311                if test -e "$path"/.git
 312                then
 313                        say "$(eval_gettext "Entering '\$prefix\$path'")"
 314                        name=$(module_name "$path")
 315                        (
 316                                prefix="$prefix$path/"
 317                                clear_local_git_env
 318                                cd "$path" &&
 319                                eval "$@" &&
 320                                if test -n "$recursive"
 321                                then
 322                                        cmd_foreach "--recursive" "$@"
 323                                fi
 324                        ) <&3 3<&- ||
 325                        die "$(eval_gettext "Stopping at '\$path'; script returned non-zero status.")"
 326                fi
 327        done
 328}
 329
 330#
 331# Register submodules in .git/config
 332#
 333# $@ = requested paths (default to all)
 334#
 335cmd_init()
 336{
 337        # parse $args after "submodule ... init".
 338        while test $# -ne 0
 339        do
 340                case "$1" in
 341                -q|--quiet)
 342                        GIT_QUIET=1
 343                        ;;
 344                --)
 345                        shift
 346                        break
 347                        ;;
 348                -*)
 349                        usage
 350                        ;;
 351                *)
 352                        break
 353                        ;;
 354                esac
 355                shift
 356        done
 357
 358        module_list "$@" |
 359        while read mode sha1 stage path
 360        do
 361                # Skip already registered paths
 362                name=$(module_name "$path") || exit
 363                if test -z "$(git config "submodule.$name.url")"
 364                then
 365                        url=$(git config -f .gitmodules submodule."$name".url)
 366                        test -z "$url" &&
 367                        die "$(eval_gettext "No url found for submodule path '\$path' in .gitmodules")"
 368
 369                        # Possibly a url relative to parent
 370                        case "$url" in
 371                        ./*|../*)
 372                                url=$(resolve_relative_url "$url") || exit
 373                                ;;
 374                        esac
 375                        git config submodule."$name".url "$url" ||
 376                        die "$(eval_gettext "Failed to register url for submodule path '\$path'")"
 377                fi
 378
 379                # Copy "update" setting when it is not set yet
 380                upd="$(git config -f .gitmodules submodule."$name".update)"
 381                test -z "$upd" ||
 382                test -n "$(git config submodule."$name".update)" ||
 383                git config submodule."$name".update "$upd" ||
 384                die "$(eval_gettext "Failed to register update mode for submodule path '\$path'")"
 385
 386                say "$(eval_gettext "Submodule '\$name' (\$url) registered for path '\$path'")"
 387        done
 388}
 389
 390#
 391# Update each submodule path to correct revision, using clone and checkout as needed
 392#
 393# $@ = requested paths (default to all)
 394#
 395cmd_update()
 396{
 397        # parse $args after "submodule ... update".
 398        orig_flags=
 399        while test $# -ne 0
 400        do
 401                case "$1" in
 402                -q|--quiet)
 403                        GIT_QUIET=1
 404                        ;;
 405                -i|--init)
 406                        init=1
 407                        ;;
 408                -N|--no-fetch)
 409                        nofetch=1
 410                        ;;
 411                -f|--force)
 412                        force=$1
 413                        ;;
 414                -r|--rebase)
 415                        update="rebase"
 416                        ;;
 417                --reference)
 418                        case "$2" in '') usage ;; esac
 419                        reference="--reference=$2"
 420                        orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 421                        shift
 422                        ;;
 423                --reference=*)
 424                        reference="$1"
 425                        ;;
 426                -m|--merge)
 427                        update="merge"
 428                        ;;
 429                --recursive)
 430                        recursive=1
 431                        ;;
 432                --checkout)
 433                        update="checkout"
 434                        ;;
 435                --)
 436                        shift
 437                        break
 438                        ;;
 439                -*)
 440                        usage
 441                        ;;
 442                *)
 443                        break
 444                        ;;
 445                esac
 446                orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 447                shift
 448        done
 449
 450        if test -n "$init"
 451        then
 452                cmd_init "--" "$@" || return
 453        fi
 454
 455        cloned_modules=
 456        module_list "$@" | {
 457        err=
 458        while read mode sha1 stage path
 459        do
 460                if test "$stage" = U
 461                then
 462                        echo >&2 "Skipping unmerged submodule $path"
 463                        continue
 464                fi
 465                name=$(module_name "$path") || exit
 466                url=$(git config submodule."$name".url)
 467                if ! test -z "$update"
 468                then
 469                        update_module=$update
 470                else
 471                        update_module=$(git config submodule."$name".update)
 472                fi
 473
 474                if test "$update_module" = "none"
 475                then
 476                        echo "Skipping submodule '$path'"
 477                        continue
 478                fi
 479
 480                if test -z "$url"
 481                then
 482                        # Only mention uninitialized submodules when its
 483                        # path have been specified
 484                        test "$#" != "0" &&
 485                        say "$(eval_gettext "Submodule path '\$path' not initialized
 486Maybe you want to use 'update --init'?")"
 487                        continue
 488                fi
 489
 490                if ! test -d "$path"/.git -o -f "$path"/.git
 491                then
 492                        module_clone "$path" "$url" "$reference"|| exit
 493                        cloned_modules="$cloned_modules;$name"
 494                        subsha1=
 495                else
 496                        subsha1=$(clear_local_git_env; cd "$path" &&
 497                                git rev-parse --verify HEAD) ||
 498                        die "$(eval_gettext "Unable to find current revision in submodule path '\$path'")"
 499                fi
 500
 501                if test "$subsha1" != "$sha1"
 502                then
 503                        subforce=$force
 504                        # If we don't already have a -f flag and the submodule has never been checked out
 505                        if test -z "$subsha1" -a -z "$force"
 506                        then
 507                                subforce="-f"
 508                        fi
 509
 510                        if test -z "$nofetch"
 511                        then
 512                                # Run fetch only if $sha1 isn't present or it
 513                                # is not reachable from a ref.
 514                                (clear_local_git_env; cd "$path" &&
 515                                        ( (rev=$(git rev-list -n 1 $sha1 --not --all 2>/dev/null) &&
 516                                         test -z "$rev") || git-fetch)) ||
 517                                die "$(eval_gettext "Unable to fetch in submodule path '\$path'")"
 518                        fi
 519
 520                        # Is this something we just cloned?
 521                        case ";$cloned_modules;" in
 522                        *";$name;"*)
 523                                # then there is no local change to integrate
 524                                update_module= ;;
 525                        esac
 526
 527                        must_die_on_failure=
 528                        case "$update_module" in
 529                        rebase)
 530                                command="git rebase"
 531                                die_msg="$(eval_gettext "Unable to rebase '\$sha1' in submodule path '\$path'")"
 532                                say_msg="$(eval_gettext "Submodule path '\$path': rebased into '\$sha1'")"
 533                                must_die_on_failure=yes
 534                                ;;
 535                        merge)
 536                                command="git merge"
 537                                die_msg="$(eval_gettext "Unable to merge '\$sha1' in submodule path '\$path'")"
 538                                say_msg="$(eval_gettext "Submodule path '\$path': merged in '\$sha1'")"
 539                                must_die_on_failure=yes
 540                                ;;
 541                        *)
 542                                command="git checkout $subforce -q"
 543                                die_msg="$(eval_gettext "Unable to checkout '\$sha1' in submodule path '\$path'")"
 544                                say_msg="$(eval_gettext "Submodule path '\$path': checked out '\$sha1'")"
 545                                ;;
 546                        esac
 547
 548                        if (clear_local_git_env; cd "$path" && $command "$sha1")
 549                        then
 550                                say "$say_msg"
 551                        elif test -n "$must_die_on_failure"
 552                        then
 553                                die_with_status 2 "$die_msg"
 554                        else
 555                                err="${err};$die_msg"
 556                                continue
 557                        fi
 558                fi
 559
 560                if test -n "$recursive"
 561                then
 562                        (clear_local_git_env; cd "$path" && eval cmd_update "$orig_flags")
 563                        res=$?
 564                        if test $res -gt 0
 565                        then
 566                                die_msg="$(eval_gettext "Failed to recurse into submodule path '\$path'")"
 567                                if test $res -eq 1
 568                                then
 569                                        err="${err};$die_msg"
 570                                        continue
 571                                else
 572                                        die_with_status $res "$die_msg"
 573                                fi
 574                        fi
 575                fi
 576        done
 577
 578        if test -n "$err"
 579        then
 580                OIFS=$IFS
 581                IFS=';'
 582                for e in $err
 583                do
 584                        if test -n "$e"
 585                        then
 586                                echo >&2 "$e"
 587                        fi
 588                done
 589                IFS=$OIFS
 590                exit 1
 591        fi
 592        }
 593}
 594
 595set_name_rev () {
 596        revname=$( (
 597                clear_local_git_env
 598                cd "$1" && {
 599                        git describe "$2" 2>/dev/null ||
 600                        git describe --tags "$2" 2>/dev/null ||
 601                        git describe --contains "$2" 2>/dev/null ||
 602                        git describe --all --always "$2"
 603                }
 604        ) )
 605        test -z "$revname" || revname=" ($revname)"
 606}
 607#
 608# Show commit summary for submodules in index or working tree
 609#
 610# If '--cached' is given, show summary between index and given commit,
 611# or between working tree and given commit
 612#
 613# $@ = [commit (default 'HEAD'),] requested paths (default all)
 614#
 615cmd_summary() {
 616        summary_limit=-1
 617        for_status=
 618        diff_cmd=diff-index
 619
 620        # parse $args after "submodule ... summary".
 621        while test $# -ne 0
 622        do
 623                case "$1" in
 624                --cached)
 625                        cached="$1"
 626                        ;;
 627                --files)
 628                        files="$1"
 629                        ;;
 630                --for-status)
 631                        for_status="$1"
 632                        ;;
 633                -n|--summary-limit)
 634                        if summary_limit=$(($2 + 0)) 2>/dev/null && test "$summary_limit" = "$2"
 635                        then
 636                                :
 637                        else
 638                                usage
 639                        fi
 640                        shift
 641                        ;;
 642                --)
 643                        shift
 644                        break
 645                        ;;
 646                -*)
 647                        usage
 648                        ;;
 649                *)
 650                        break
 651                        ;;
 652                esac
 653                shift
 654        done
 655
 656        test $summary_limit = 0 && return
 657
 658        if rev=$(git rev-parse -q --verify --default HEAD ${1+"$1"})
 659        then
 660                head=$rev
 661                test $# = 0 || shift
 662        elif test -z "$1" -o "$1" = "HEAD"
 663        then
 664                # before the first commit: compare with an empty tree
 665                head=$(git hash-object -w -t tree --stdin </dev/null)
 666                test -z "$1" || shift
 667        else
 668                head="HEAD"
 669        fi
 670
 671        if [ -n "$files" ]
 672        then
 673                test -n "$cached" &&
 674                die "$(gettext -- "--cached cannot be used with --files")"
 675                diff_cmd=diff-files
 676                head=
 677        fi
 678
 679        cd_to_toplevel
 680        # Get modified modules cared by user
 681        modules=$(git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- "$@" |
 682                sane_egrep '^:([0-7]* )?160000' |
 683                while read mod_src mod_dst sha1_src sha1_dst status name
 684                do
 685                        # Always show modules deleted or type-changed (blob<->module)
 686                        test $status = D -o $status = T && echo "$name" && continue
 687                        # Also show added or modified modules which are checked out
 688                        GIT_DIR="$name/.git" git-rev-parse --git-dir >/dev/null 2>&1 &&
 689                        echo "$name"
 690                done
 691        )
 692
 693        test -z "$modules" && return
 694
 695        git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- $modules |
 696        sane_egrep '^:([0-7]* )?160000' |
 697        cut -c2- |
 698        while read mod_src mod_dst sha1_src sha1_dst status name
 699        do
 700                if test -z "$cached" &&
 701                        test $sha1_dst = 0000000000000000000000000000000000000000
 702                then
 703                        case "$mod_dst" in
 704                        160000)
 705                                sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
 706                                ;;
 707                        100644 | 100755 | 120000)
 708                                sha1_dst=$(git hash-object $name)
 709                                ;;
 710                        000000)
 711                                ;; # removed
 712                        *)
 713                                # unexpected type
 714                                (
 715                                        eval_gettext "unexpected mode \$mod_dst" &&
 716                                        echo
 717                                ) >&2
 718                                continue ;;
 719                        esac
 720                fi
 721                missing_src=
 722                missing_dst=
 723
 724                test $mod_src = 160000 &&
 725                ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_src^0 >/dev/null &&
 726                missing_src=t
 727
 728                test $mod_dst = 160000 &&
 729                ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_dst^0 >/dev/null &&
 730                missing_dst=t
 731
 732                total_commits=
 733                case "$missing_src,$missing_dst" in
 734                t,)
 735                        errmsg="$(eval_gettext "  Warn: \$name doesn't contain commit \$sha1_src")"
 736                        ;;
 737                ,t)
 738                        errmsg="$(eval_gettext "  Warn: \$name doesn't contain commit \$sha1_dst")"
 739                        ;;
 740                t,t)
 741                        errmsg="$(eval_gettext "  Warn: \$name doesn't contain commits \$sha1_src and \$sha1_dst")"
 742                        ;;
 743                *)
 744                        errmsg=
 745                        total_commits=$(
 746                        if test $mod_src = 160000 -a $mod_dst = 160000
 747                        then
 748                                range="$sha1_src...$sha1_dst"
 749                        elif test $mod_src = 160000
 750                        then
 751                                range=$sha1_src
 752                        else
 753                                range=$sha1_dst
 754                        fi
 755                        GIT_DIR="$name/.git" \
 756                        git rev-list --first-parent $range -- | wc -l
 757                        )
 758                        total_commits=" ($(($total_commits + 0)))"
 759                        ;;
 760                esac
 761
 762                sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
 763                sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
 764                if test $status = T
 765                then
 766                        blob="$(gettext "blob")"
 767                        submodule="$(gettext "submodule")"
 768                        if test $mod_dst = 160000
 769                        then
 770                                echo "* $name $sha1_abbr_src($blob)->$sha1_abbr_dst($submodule)$total_commits:"
 771                        else
 772                                echo "* $name $sha1_abbr_src($submodule)->$sha1_abbr_dst($blob)$total_commits:"
 773                        fi
 774                else
 775                        echo "* $name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
 776                fi
 777                if test -n "$errmsg"
 778                then
 779                        # Don't give error msg for modification whose dst is not submodule
 780                        # i.e. deleted or changed to blob
 781                        test $mod_dst = 160000 && echo "$errmsg"
 782                else
 783                        if test $mod_src = 160000 -a $mod_dst = 160000
 784                        then
 785                                limit=
 786                                test $summary_limit -gt 0 && limit="-$summary_limit"
 787                                GIT_DIR="$name/.git" \
 788                                git log $limit --pretty='format:  %m %s' \
 789                                --first-parent $sha1_src...$sha1_dst
 790                        elif test $mod_dst = 160000
 791                        then
 792                                GIT_DIR="$name/.git" \
 793                                git log --pretty='format:  > %s' -1 $sha1_dst
 794                        else
 795                                GIT_DIR="$name/.git" \
 796                                git log --pretty='format:  < %s' -1 $sha1_src
 797                        fi
 798                        echo
 799                fi
 800                echo
 801        done |
 802        if test -n "$for_status"; then
 803                if [ -n "$files" ]; then
 804                        gettext "# Submodules changed but not updated:"; echo
 805                else
 806                        gettext "# Submodule changes to be committed:"; echo
 807                fi
 808                echo "#"
 809                sed -e 's|^|# |' -e 's|^# $|#|'
 810        else
 811                cat
 812        fi
 813}
 814#
 815# List all submodules, prefixed with:
 816#  - submodule not initialized
 817#  + different revision checked out
 818#
 819# If --cached was specified the revision in the index will be printed
 820# instead of the currently checked out revision.
 821#
 822# $@ = requested paths (default to all)
 823#
 824cmd_status()
 825{
 826        # parse $args after "submodule ... status".
 827        orig_flags=
 828        while test $# -ne 0
 829        do
 830                case "$1" in
 831                -q|--quiet)
 832                        GIT_QUIET=1
 833                        ;;
 834                --cached)
 835                        cached=1
 836                        ;;
 837                --recursive)
 838                        recursive=1
 839                        ;;
 840                --)
 841                        shift
 842                        break
 843                        ;;
 844                -*)
 845                        usage
 846                        ;;
 847                *)
 848                        break
 849                        ;;
 850                esac
 851                orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 852                shift
 853        done
 854
 855        module_list "$@" |
 856        while read mode sha1 stage path
 857        do
 858                name=$(module_name "$path") || exit
 859                url=$(git config submodule."$name".url)
 860                displaypath="$prefix$path"
 861                if test "$stage" = U
 862                then
 863                        say "U$sha1 $displaypath"
 864                        continue
 865                fi
 866                if test -z "$url" || ! test -d "$path"/.git -o -f "$path"/.git
 867                then
 868                        say "-$sha1 $displaypath"
 869                        continue;
 870                fi
 871                set_name_rev "$path" "$sha1"
 872                if git diff-files --ignore-submodules=dirty --quiet -- "$path"
 873                then
 874                        say " $sha1 $displaypath$revname"
 875                else
 876                        if test -z "$cached"
 877                        then
 878                                sha1=$(clear_local_git_env; cd "$path" && git rev-parse --verify HEAD)
 879                                set_name_rev "$path" "$sha1"
 880                        fi
 881                        say "+$sha1 $displaypath$revname"
 882                fi
 883
 884                if test -n "$recursive"
 885                then
 886                        (
 887                                prefix="$displaypath/"
 888                                clear_local_git_env
 889                                cd "$path" &&
 890                                eval cmd_status "$orig_args"
 891                        ) ||
 892                        die "$(eval_gettext "Failed to recurse into submodule path '\$path'")"
 893                fi
 894        done
 895}
 896#
 897# Sync remote urls for submodules
 898# This makes the value for remote.$remote.url match the value
 899# specified in .gitmodules.
 900#
 901cmd_sync()
 902{
 903        while test $# -ne 0
 904        do
 905                case "$1" in
 906                -q|--quiet)
 907                        GIT_QUIET=1
 908                        shift
 909                        ;;
 910                --)
 911                        shift
 912                        break
 913                        ;;
 914                -*)
 915                        usage
 916                        ;;
 917                *)
 918                        break
 919                        ;;
 920                esac
 921        done
 922        cd_to_toplevel
 923        module_list "$@" |
 924        while read mode sha1 stage path
 925        do
 926                name=$(module_name "$path")
 927                url=$(git config -f .gitmodules --get submodule."$name".url)
 928
 929                # Possibly a url relative to parent
 930                case "$url" in
 931                ./*|../*)
 932                        url=$(resolve_relative_url "$url") || exit
 933                        ;;
 934                esac
 935
 936                if git config "submodule.$name.url" >/dev/null 2>/dev/null
 937                then
 938                        say "$(eval_gettext "Synchronizing submodule url for '\$name'")"
 939                        git config submodule."$name".url "$url"
 940
 941                        if test -e "$path"/.git
 942                        then
 943                        (
 944                                clear_local_git_env
 945                                cd "$path"
 946                                remote=$(get_default_remote)
 947                                git config remote."$remote".url "$url"
 948                        )
 949                        fi
 950                fi
 951        done
 952}
 953
 954# This loop parses the command line arguments to find the
 955# subcommand name to dispatch.  Parsing of the subcommand specific
 956# options are primarily done by the subcommand implementations.
 957# Subcommand specific options such as --branch and --cached are
 958# parsed here as well, for backward compatibility.
 959
 960while test $# != 0 && test -z "$command"
 961do
 962        case "$1" in
 963        add | foreach | init | update | status | summary | sync)
 964                command=$1
 965                ;;
 966        -q|--quiet)
 967                GIT_QUIET=1
 968                ;;
 969        -b|--branch)
 970                case "$2" in
 971                '')
 972                        usage
 973                        ;;
 974                esac
 975                branch="$2"; shift
 976                ;;
 977        --cached)
 978                cached="$1"
 979                ;;
 980        --)
 981                break
 982                ;;
 983        -*)
 984                usage
 985                ;;
 986        *)
 987                break
 988                ;;
 989        esac
 990        shift
 991done
 992
 993# No command word defaults to "status"
 994test -n "$command" || command=status
 995
 996# "-b branch" is accepted only by "add"
 997if test -n "$branch" && test "$command" != add
 998then
 999        usage
1000fi
1001
1002# "--cached" is accepted only by "status" and "summary"
1003if test -n "$cached" && test "$command" != status -a "$command" != summary
1004then
1005        usage
1006fi
1007
1008"cmd_$command" "$@"