git.oblomov.eu Git - git/blob - git-submodule.sh

   1 #!/bin/sh
   2 #
   3 # git-submodules.sh: add, init, update or list git submodules
   4 #
   5 # Copyright (c) 2007 Lars Hjemli
   6
   7 dashless=$(basename "$0" | sed -e 's/-/ /')
   8 USAGE="[--quiet] add [-b branch] [-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: $dashless [--quiet] sync [--] [<path>...]"
  15 OPTIONS_SPEC=
  16 . git-sh-setup
  17 . git-sh-i18n
  18 . git-parse-remote
  19 require_work_tree
  20
  21 command=
  22 branch=
  23 force=
  24 reference=
  25 cached=
  26 recursive=
  27 init=
  28 files=
  29 nofetch=
  30 update=
  31 prefix=
  32
  33 # Resolve relative url by appending to parent's url
  34 resolve_relative_url ()
  35 {
  36         remote=$(get_default_remote)
  37         remoteurl=$(git config "remote.$remote.url") ||
  38                 die "$(eval_gettext "remote (\$remote) does not have a url defined in .git/config")"
  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 # $@ = path to limit submodule list
  73 #
  74 module_list()
  75 {
  76         git ls-files --error-unmatch --stage -- "$@" |
  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 #
 101 module_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 #
 120 module_clone()
 121 {
 122         path=$1
 123         url=$2
 124         reference="$3"
 125
 126         if test -n "$reference"
 127         then
 128                 git-clone "$reference" -n "$url" "$path"
 129         else
 130                 git-clone -n "$url" "$path"
 131         fi ||
 132         die "$(eval_gettext "Clone of '\$url' into submodule path '\$path' failed")"
 133 }
 134
 135 #
 136 # Add a new submodule to the working tree, .gitmodules and the index
 137 #
 138 # $@ = repo path
 139 #
 140 # optional branch is stored in global branch variable
 141 #
 142 cmd_add()
 143 {
 144         # parse $args after "submodule ... add".
 145         while test $# -ne 0
 146         do
 147                 case "$1" in
 148                 -b | --branch)
 149                         case "$2" in '') usage ;; esac
 150                         branch=$2
 151                         shift
 152                         ;;
 153                 -f | --force)
 154                         force=$1
 155                         ;;
 156                 -q|--quiet)
 157                         GIT_QUIET=1
 158                         ;;
 159                 --reference)
 160                         case "$2" in '') usage ;; esac
 161                         reference="--reference=$2"
 162                         shift
 163                         ;;
 164                 --reference=*)
 165                         reference="$1"
 166                         shift
 167                         ;;
 168                 --)
 169                         shift
 170                         break
 171                         ;;
 172                 -*)
 173                         usage
 174                         ;;
 175                 *)
 176                         break
 177                         ;;
 178                 esac
 179                 shift
 180         done
 181
 182         repo=$1
 183         path=$2
 184
 185         if test -z "$path"; then
 186                 path=$(echo "$repo" |
 187                         sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
 188         fi
 189
 190         if test -z "$repo" -o -z "$path"; then
 191                 usage
 192         fi
 193
 194         # assure repo is absolute or relative to parent
 195         case "$repo" in
 196         ./*|../*)
 197                 # dereference source url relative to parent's url
 198                 realrepo=$(resolve_relative_url "$repo") || exit
 199                 ;;
 200         *:*|/*)
 201                 # absolute url
 202                 realrepo=$repo
 203                 ;;
 204         *)
 205                 die "$(eval_gettext "repo URL: '\$repo' must be absolute or begin with ./|../")"
 206         ;;
 207         esac
 208
 209         # normalize path:
 210         # multiple //; leading ./; /./; /../; trailing /
 211         path=$(printf '%s/\n' "$path" |
 212                 sed -e '
 213                         s|//*|/|g
 214                         s|^\(\./\)*||
 215                         s|/\./|/|g
 216                         :start
 217                         s|\([^/]*\)/\.\./||
 218                         tstart
 219                         s|/*$||
 220                 ')
 221         git ls-files --error-unmatch "$path" > /dev/null 2>&1 &&
 222         die "$(eval_gettext "'\$path' already exists in the index")"
 223
 224         if test -z "$force" && ! git add --dry-run --ignore-missing "$path" > /dev/null 2>&1
 225         then
 226                 (
 227                         eval_gettext "The following path is ignored by one of your .gitignore files:
 228 \$path
 229 Use -f if you really want to add it." &&
 230                         echo
 231                 ) >&2
 232                 exit 1
 233         fi
 234
 235         # perhaps the path exists and is already a git repo, else clone it
 236         if test -e "$path"
 237         then
 238                 if test -d "$path"/.git -o -f "$path"/.git
 239                 then
 240                         eval_gettext "Adding existing repo at '\$path' to the index"; echo
 241                 else
 242                         die "$(eval_gettext "'\$path' already exists and is not a valid git repo")"
 243                 fi
 244
 245                 case "$repo" in
 246                 ./*|../*)
 247                         url=$(resolve_relative_url "$repo") || exit
 248                     ;;
 249                 *)
 250                         url="$repo"
 251                         ;;
 252                 esac
 253                 git config submodule."$path".url "$url"
 254         else
 255
 256                 module_clone "$path" "$realrepo" "$reference" || exit
 257                 (
 258                         clear_local_git_env
 259                         cd "$path" &&
 260                         # ash fails to wordsplit ${branch:+-b "$branch"...}
 261                         case "$branch" in
 262                         '') git checkout -f -q ;;
 263                         ?*) git checkout -f -q -B "$branch" "origin/$branch" ;;
 264                         esac
 265                 ) || die "$(eval_gettext "Unable to checkout submodule '\$path'")"
 266         fi
 267
 268         git add $force "$path" ||
 269         die "$(eval_gettext "Failed to add submodule '\$path'")"
 270
 271         git config -f .gitmodules submodule."$path".path "$path" &&
 272         git config -f .gitmodules submodule."$path".url "$repo" &&
 273         git add --force .gitmodules ||
 274         die "$(eval_gettext "Failed to register submodule '\$path'")"
 275 }
 276
 277 #
 278 # Execute an arbitrary command sequence in each checked out
 279 # submodule
 280 #
 281 # $@ = command to execute
 282 #
 283 cmd_foreach()
 284 {
 285         # parse $args after "submodule ... foreach".
 286         while test $# -ne 0
 287         do
 288                 case "$1" in
 289                 -q|--quiet)
 290                         GIT_QUIET=1
 291                         ;;
 292                 --recursive)
 293                         recursive=1
 294                         ;;
 295                 -*)
 296                         usage
 297                         ;;
 298                 *)
 299                         break
 300                         ;;
 301                 esac
 302                 shift
 303         done
 304
 305         toplevel=$(pwd)
 306
 307         # dup stdin so that it can be restored when running the external
 308         # command in the subshell (and a recursive call to this function)
 309         exec 3<&0
 310
 311         module_list |
 312         while read mode sha1 stage path
 313         do
 314                 if test -e "$path"/.git
 315                 then
 316                         say "$(eval_gettext "Entering '\$prefix\$path'")"
 317                         name=$(module_name "$path")
 318                         (
 319                                 prefix="$prefix$path/"
 320                                 clear_local_git_env
 321                                 cd "$path" &&
 322                                 eval "$@" &&
 323                                 if test -n "$recursive"
 324                                 then
 325                                         cmd_foreach "--recursive" "$@"
 326                                 fi
 327                         ) <&3 3<&- ||
 328                         die "$(eval_gettext "Stopping at '\$path'; script returned non-zero status.")"
 329                 fi
 330         done
 331 }
 332
 333 #
 334 # Register submodules in .git/config
 335 #
 336 # $@ = requested paths (default to all)
 337 #
 338 cmd_init()
 339 {
 340         # parse $args after "submodule ... init".
 341         while test $# -ne 0
 342         do
 343                 case "$1" in
 344                 -q|--quiet)
 345                         GIT_QUIET=1
 346                         ;;
 347                 --)
 348                         shift
 349                         break
 350                         ;;
 351                 -*)
 352                         usage
 353                         ;;
 354                 *)
 355                         break
 356                         ;;
 357                 esac
 358                 shift
 359         done
 360
 361         module_list "$@" |
 362         while read mode sha1 stage path
 363         do
 364                 # Skip already registered paths
 365                 name=$(module_name "$path") || exit
 366                 url=$(git config submodule."$name".url)
 367                 test -z "$url" || continue
 368
 369                 url=$(git config -f .gitmodules submodule."$name".url)
 370                 test -z "$url" &&
 371                 die "$(eval_gettext "No url found for submodule path '\$path' in .gitmodules")"
 372
 373                 # Possibly a url relative to parent
 374                 case "$url" in
 375                 ./*|../*)
 376                         url=$(resolve_relative_url "$url") || exit
 377                         ;;
 378                 esac
 379
 380                 git config submodule."$name".url "$url" ||
 381                 die "$(eval_gettext "Failed to register url for submodule path '\$path'")"
 382
 383                 upd="$(git config -f .gitmodules submodule."$name".update)"
 384                 test -z "$upd" ||
 385                 git config submodule."$name".update "$upd" ||
 386                 die "$(eval_gettext "Failed to register update mode for submodule path '\$path'")"
 387
 388                 say "$(eval_gettext "Submodule '\$name' (\$url) registered for path '\$path'")"
 389         done
 390 }
 391
 392 #
 393 # Update each submodule path to correct revision, using clone and checkout as needed
 394 #
 395 # $@ = requested paths (default to all)
 396 #
 397 cmd_update()
 398 {
 399         # parse $args after "submodule ... update".
 400         orig_flags=
 401         while test $# -ne 0
 402         do
 403                 case "$1" in
 404                 -q|--quiet)
 405                         GIT_QUIET=1
 406                         ;;
 407                 -i|--init)
 408                         init=1
 409                         ;;
 410                 -N|--no-fetch)
 411                         nofetch=1
 412                         ;;
 413                 -f|--force)
 414                         force=$1
 415                         ;;
 416                 -r|--rebase)
 417                         update="rebase"
 418                         ;;
 419                 --reference)
 420                         case "$2" in '') usage ;; esac
 421                         reference="--reference=$2"
 422                         orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 423                         shift
 424                         ;;
 425                 --reference=*)
 426                         reference="$1"
 427                         ;;
 428                 -m|--merge)
 429                         update="merge"
 430                         ;;
 431                 --recursive)
 432                         recursive=1
 433                         ;;
 434                 --)
 435                         shift
 436                         break
 437                         ;;
 438                 -*)
 439                         usage
 440                         ;;
 441                 *)
 442                         break
 443                         ;;
 444                 esac
 445                 orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 446                 shift
 447         done
 448
 449         if test -n "$init"
 450         then
 451                 cmd_init "--" "$@" || return
 452         fi
 453
 454         cloned_modules=
 455         module_list "$@" | {
 456         err=
 457         while read mode sha1 stage path
 458         do
 459                 if test "$stage" = U
 460                 then
 461                         echo >&2 "Skipping unmerged submodule $path"
 462                         continue
 463                 fi
 464                 name=$(module_name "$path") || exit
 465                 url=$(git config submodule."$name".url)
 466                 update_module=$(git config submodule."$name".update)
 467                 if test -z "$url"
 468                 then
 469                         # Only mention uninitialized submodules when its
 470                         # path have been specified
 471                         test "$#" != "0" &&
 472                         say "$(eval_gettext "Submodule path '\$path' not initialized
 473 Maybe you want to use 'update --init'?")"
 474                         continue
 475                 fi
 476
 477                 if ! test -d "$path"/.git -o -f "$path"/.git
 478                 then
 479                         module_clone "$path" "$url" "$reference"|| exit
 480                         cloned_modules="$cloned_modules;$name"
 481                         subsha1=
 482                 else
 483                         subsha1=$(clear_local_git_env; cd "$path" &&
 484                                 git rev-parse --verify HEAD) ||
 485                         die "$(eval_gettext "Unable to find current revision in submodule path '\$path'")"
 486                 fi
 487
 488                 if ! test -z "$update"
 489                 then
 490                         update_module=$update
 491                 fi
 492
 493                 if test "$subsha1" != "$sha1"
 494                 then
 495                         subforce=$force
 496                         # If we don't already have a -f flag and the submodule has never been checked out
 497                         if test -z "$subsha1" -a -z "$force"
 498                         then
 499                                 subforce="-f"
 500                         fi
 501
 502                         if test -z "$nofetch"
 503                         then
 504                                 # Run fetch only if $sha1 isn't present or it
 505                                 # is not reachable from a ref.
 506                                 (clear_local_git_env; cd "$path" &&
 507                                         ( (rev=$(git rev-list -n 1 $sha1 --not --all 2>/dev/null) &&
 508                                          test -z "$rev") || git-fetch)) ||
 509                                 die "$(eval_gettext "Unable to fetch in submodule path '\$path'")"
 510                         fi
 511
 512                         # Is this something we just cloned?
 513                         case ";$cloned_modules;" in
 514                         *";$name;"*)
 515                                 # then there is no local change to integrate
 516                                 update_module= ;;
 517                         esac
 518
 519                         must_die_on_failure=
 520                         case "$update_module" in
 521                         rebase)
 522                                 command="git rebase"
 523                                 die_msg="$(eval_gettext "Unable to rebase '\$sha1' in submodule path '\$path'")"
 524                                 say_msg="$(eval_gettext "Submodule path '\$path': rebased into '\$sha1'")"
 525                                 must_die_on_failure=yes
 526                                 ;;
 527                         merge)
 528                                 command="git merge"
 529                                 die_msg="$(eval_gettext "Unable to merge '\$sha1' in submodule path '\$path'")"
 530                                 say_msg="$(eval_gettext "Submodule path '\$path': merged in '\$sha1'")"
 531                                 must_die_on_failure=yes
 532                                 ;;
 533                         *)
 534                                 command="git checkout $subforce -q"
 535                                 die_msg="$(eval_gettext "Unable to checkout '\$sha1' in submodule path '\$path'")"
 536                                 say_msg="$(eval_gettext "Submodule path '\$path': checked out '\$sha1'")"
 537                                 ;;
 538                         esac
 539
 540                         if (clear_local_git_env; cd "$path" && $command "$sha1")
 541                         then
 542                                 say "$say_msg"
 543                         elif test -n "$must_die_on_failure"
 544                         then
 545                                 die_with_status 2 "$die_msg"
 546                         else
 547                                 err="${err};$die_msg"
 548                                 continue
 549                         fi
 550                 fi
 551
 552                 if test -n "$recursive"
 553                 then
 554                         (clear_local_git_env; cd "$path" && eval cmd_update "$orig_flags")
 555                         res=$?
 556                         if test $res -gt 0
 557                         then
 558                                 die_msg="$(eval_gettext "Failed to recurse into submodule path '\$path'")"
 559                                 if test $res -eq 1
 560                                 then
 561                                         err="${err};$die_msg"
 562                                         continue
 563                                 else
 564                                         die_with_status $res "$die_msg"
 565                                 fi
 566                         fi
 567                 fi
 568         done
 569
 570         if test -n "$err"
 571         then
 572                 OIFS=$IFS
 573                 IFS=';'
 574                 for e in $err
 575                 do
 576                         if test -n "$e"
 577                         then
 578                                 echo >&2 "$e"
 579                         fi
 580                 done
 581                 IFS=$OIFS
 582                 exit 1
 583         fi
 584         }
 585 }
 586
 587 set_name_rev () {
 588         revname=$( (
 589                 clear_local_git_env
 590                 cd "$1" && {
 591                         git describe "$2" 2>/dev/null ||
 592                         git describe --tags "$2" 2>/dev/null ||
 593                         git describe --contains "$2" 2>/dev/null ||
 594                         git describe --all --always "$2"
 595                 }
 596         ) )
 597         test -z "$revname" || revname=" ($revname)"
 598 }
 599 #
 600 # Show commit summary for submodules in index or working tree
 601 #
 602 # If '--cached' is given, show summary between index and given commit,
 603 # or between working tree and given commit
 604 #
 605 # $@ = [commit (default 'HEAD'),] requested paths (default all)
 606 #
 607 cmd_summary() {
 608         summary_limit=-1
 609         for_status=
 610         diff_cmd=diff-index
 611
 612         # parse $args after "submodule ... summary".
 613         while test $# -ne 0
 614         do
 615                 case "$1" in
 616                 --cached)
 617                         cached="$1"
 618                         ;;
 619                 --files)
 620                         files="$1"
 621                         ;;
 622                 --for-status)
 623                         for_status="$1"
 624                         ;;
 625                 -n|--summary-limit)
 626                         if summary_limit=$(($2 + 0)) 2>/dev/null && test "$summary_limit" = "$2"
 627                         then
 628                                 :
 629                         else
 630                                 usage
 631                         fi
 632                         shift
 633                         ;;
 634                 --)
 635                         shift
 636                         break
 637                         ;;
 638                 -*)
 639                         usage
 640                         ;;
 641                 *)
 642                         break
 643                         ;;
 644                 esac
 645                 shift
 646         done
 647
 648         test $summary_limit = 0 && return
 649
 650         if rev=$(git rev-parse -q --verify --default HEAD ${1+"$1"})
 651         then
 652                 head=$rev
 653                 test $# = 0 || shift
 654         elif test -z "$1" -o "$1" = "HEAD"
 655         then
 656                 # before the first commit: compare with an empty tree
 657                 head=$(git hash-object -w -t tree --stdin </dev/null)
 658                 test -z "$1" || shift
 659         else
 660                 head="HEAD"
 661         fi
 662
 663         if [ -n "$files" ]
 664         then
 665                 test -n "$cached" &&
 666                 die "$(gettext -- "--cached cannot be used with --files")"
 667                 diff_cmd=diff-files
 668                 head=
 669         fi
 670
 671         cd_to_toplevel
 672         # Get modified modules cared by user
 673         modules=$(git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- "$@" |
 674                 sane_egrep '^:([0-7]* )?160000' |
 675                 while read mod_src mod_dst sha1_src sha1_dst status name
 676                 do
 677                         # Always show modules deleted or type-changed (blob<->module)
 678                         test $status = D -o $status = T && echo "$name" && continue
 679                         # Also show added or modified modules which are checked out
 680                         GIT_DIR="$name/.git" git-rev-parse --git-dir >/dev/null 2>&1 &&
 681                         echo "$name"
 682                 done
 683         )
 684
 685         test -z "$modules" && return
 686
 687         git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- $modules |
 688         sane_egrep '^:([0-7]* )?160000' |
 689         cut -c2- |
 690         while read mod_src mod_dst sha1_src sha1_dst status name
 691         do
 692                 if test -z "$cached" &&
 693                         test $sha1_dst = 0000000000000000000000000000000000000000
 694                 then
 695                         case "$mod_dst" in
 696                         160000)
 697                                 sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
 698                                 ;;
 699                         100644 | 100755 | 120000)
 700                                 sha1_dst=$(git hash-object $name)
 701                                 ;;
 702                         000000)
 703                                 ;; # removed
 704                         *)
 705                                 # unexpected type
 706                                 (
 707                                         eval_gettext "unexpected mode \$mod_dst" &&
 708                                         echo
 709                                 ) >&2
 710                                 continue ;;
 711                         esac
 712                 fi
 713                 missing_src=
 714                 missing_dst=
 715
 716                 test $mod_src = 160000 &&
 717                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_src^0 >/dev/null &&
 718                 missing_src=t
 719
 720                 test $mod_dst = 160000 &&
 721                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_dst^0 >/dev/null &&
 722                 missing_dst=t
 723
 724                 total_commits=
 725                 case "$missing_src,$missing_dst" in
 726                 t,)
 727                         errmsg="$(eval_gettext "  Warn: \$name doesn't contain commit \$sha1_src")"
 728                         ;;
 729                 ,t)
 730                         errmsg="$(eval_gettext "  Warn: \$name doesn't contain commit \$sha1_dst")"
 731                         ;;
 732                 t,t)
 733                         errmsg="$(eval_gettext "  Warn: \$name doesn't contain commits \$sha1_src and \$sha1_dst")"
 734                         ;;
 735                 *)
 736                         errmsg=
 737                         total_commits=$(
 738                         if test $mod_src = 160000 -a $mod_dst = 160000
 739                         then
 740                                 range="$sha1_src...$sha1_dst"
 741                         elif test $mod_src = 160000
 742                         then
 743                                 range=$sha1_src
 744                         else
 745                                 range=$sha1_dst
 746                         fi
 747                         GIT_DIR="$name/.git" \
 748                         git rev-list --first-parent $range -- | wc -l
 749                         )
 750                         total_commits=" ($(($total_commits + 0)))"
 751                         ;;
 752                 esac
 753
 754                 sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
 755                 sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
 756                 if test $status = T
 757                 then
 758                         blob="$(gettext "blob")"
 759                         submodule="$(gettext "submodule")"
 760                         if test $mod_dst = 160000
 761                         then
 762                                 echo "* $name $sha1_abbr_src($blob)->$sha1_abbr_dst($submodule)$total_commits:"
 763                         else
 764                                 echo "* $name $sha1_abbr_src($submodule)->$sha1_abbr_dst($blob)$total_commits:"
 765                         fi
 766                 else
 767                         echo "* $name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
 768                 fi
 769                 if test -n "$errmsg"
 770                 then
 771                         # Don't give error msg for modification whose dst is not submodule
 772                         # i.e. deleted or changed to blob
 773                         test $mod_dst = 160000 && echo "$errmsg"
 774                 else
 775                         if test $mod_src = 160000 -a $mod_dst = 160000
 776                         then
 777                                 limit=
 778                                 test $summary_limit -gt 0 && limit="-$summary_limit"
 779                                 GIT_DIR="$name/.git" \
 780                                 git log $limit --pretty='format:  %m %s' \
 781                                 --first-parent $sha1_src...$sha1_dst
 782                         elif test $mod_dst = 160000
 783                         then
 784                                 GIT_DIR="$name/.git" \
 785                                 git log --pretty='format:  > %s' -1 $sha1_dst
 786                         else
 787                                 GIT_DIR="$name/.git" \
 788                                 git log --pretty='format:  < %s' -1 $sha1_src
 789                         fi
 790                         echo
 791                 fi
 792                 echo
 793         done |
 794         if test -n "$for_status"; then
 795                 if [ -n "$files" ]; then
 796                         gettext "# Submodules changed but not updated:"; echo
 797                 else
 798                         gettext "# Submodule changes to be committed:"; echo
 799                 fi
 800                 echo "#"
 801                 sed -e 's|^|# |' -e 's|^# $|#|'
 802         else
 803                 cat
 804         fi
 805 }
 806 #
 807 # List all submodules, prefixed with:
 808 #  - submodule not initialized
 809 #  + different revision checked out
 810 #
 811 # If --cached was specified the revision in the index will be printed
 812 # instead of the currently checked out revision.
 813 #
 814 # $@ = requested paths (default to all)
 815 #
 816 cmd_status()
 817 {
 818         # parse $args after "submodule ... status".
 819         orig_flags=
 820         while test $# -ne 0
 821         do
 822                 case "$1" in
 823                 -q|--quiet)
 824                         GIT_QUIET=1
 825                         ;;
 826                 --cached)
 827                         cached=1
 828                         ;;
 829                 --recursive)
 830                         recursive=1
 831                         ;;
 832                 --)
 833                         shift
 834                         break
 835                         ;;
 836                 -*)
 837                         usage
 838                         ;;
 839                 *)
 840                         break
 841                         ;;
 842                 esac
 843                 orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 844                 shift
 845         done
 846
 847         module_list "$@" |
 848         while read mode sha1 stage path
 849         do
 850                 name=$(module_name "$path") || exit
 851                 url=$(git config submodule."$name".url)
 852                 displaypath="$prefix$path"
 853                 if test "$stage" = U
 854                 then
 855                         say "U$sha1 $displaypath"
 856                         continue
 857                 fi
 858                 if test -z "$url" || ! test -d "$path"/.git -o -f "$path"/.git
 859                 then
 860                         say "-$sha1 $displaypath"
 861                         continue;
 862                 fi
 863                 set_name_rev "$path" "$sha1"
 864                 if git diff-files --ignore-submodules=dirty --quiet -- "$path"
 865                 then
 866                         say " $sha1 $displaypath$revname"
 867                 else
 868                         if test -z "$cached"
 869                         then
 870                                 sha1=$(clear_local_git_env; cd "$path" && git rev-parse --verify HEAD)
 871                                 set_name_rev "$path" "$sha1"
 872                         fi
 873                         say "+$sha1 $displaypath$revname"
 874                 fi
 875
 876                 if test -n "$recursive"
 877                 then
 878                         (
 879                                 prefix="$displaypath/"
 880                                 clear_local_git_env
 881                                 cd "$path" &&
 882                                 eval cmd_status "$orig_args"
 883                         ) ||
 884                         die "$(eval_gettext "Failed to recurse into submodule path '\$path'")"
 885                 fi
 886         done
 887 }
 888 #
 889 # Sync remote urls for submodules
 890 # This makes the value for remote.$remote.url match the value
 891 # specified in .gitmodules.
 892 #
 893 cmd_sync()
 894 {
 895         while test $# -ne 0
 896         do
 897                 case "$1" in
 898                 -q|--quiet)
 899                         GIT_QUIET=1
 900                         shift
 901                         ;;
 902                 --)
 903                         shift
 904                         break
 905                         ;;
 906                 -*)
 907                         usage
 908                         ;;
 909                 *)
 910                         break
 911                         ;;
 912                 esac
 913         done
 914         cd_to_toplevel
 915         module_list "$@" |
 916         while read mode sha1 stage path
 917         do
 918                 name=$(module_name "$path")
 919                 url=$(git config -f .gitmodules --get submodule."$name".url)
 920
 921                 # Possibly a url relative to parent
 922                 case "$url" in
 923                 ./*|../*)
 924                         url=$(resolve_relative_url "$url") || exit
 925                         ;;
 926                 esac
 927
 928                 say "$(eval_gettext "Synchronizing submodule url for '\$name'")"
 929                 git config submodule."$name".url "$url"
 930
 931                 if test -e "$path"/.git
 932                 then
 933                 (
 934                         clear_local_git_env
 935                         cd "$path"
 936                         remote=$(get_default_remote)
 937                         git config remote."$remote".url "$url"
 938                 )
 939                 fi
 940         done
 941 }
 942
 943 # This loop parses the command line arguments to find the
 944 # subcommand name to dispatch.  Parsing of the subcommand specific
 945 # options are primarily done by the subcommand implementations.
 946 # Subcommand specific options such as --branch and --cached are
 947 # parsed here as well, for backward compatibility.
 948
 949 while test $# != 0 && test -z "$command"
 950 do
 951         case "$1" in
 952         add | foreach | init | update | status | summary | sync)
 953                 command=$1
 954                 ;;
 955         -q|--quiet)
 956                 GIT_QUIET=1
 957                 ;;
 958         -b|--branch)
 959                 case "$2" in
 960                 '')
 961                         usage
 962                         ;;
 963                 esac
 964                 branch="$2"; shift
 965                 ;;
 966         --cached)
 967                 cached="$1"
 968                 ;;
 969         --)
 970                 break
 971                 ;;
 972         -*)
 973                 usage
 974                 ;;
 975         *)
 976                 break
 977                 ;;
 978         esac
 979         shift
 980 done
 981
 982 # No command word defaults to "status"
 983 test -n "$command" || command=status
 984
 985 # "-b branch" is accepted only by "add"
 986 if test -n "$branch" && test "$command" != add
 987 then
 988         usage
 989 fi
 990
 991 # "--cached" is accepted only by "status" and "summary"
 992 if test -n "$cached" && test "$command" != status -a "$command" != summary
 993 then
 994         usage
 995 fi
 996
 997 "cmd_$command" "$@"