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                 echo >&2 "The following path is ignored by one of your .gitignore files:" &&
 227                 echo >&2 $path &&
 228                 echo >&2 "Use -f if you really want to add it."
 229                 exit 1
 230         fi
 231
 232         # perhaps the path exists and is already a git repo, else clone it
 233         if test -e "$path"
 234         then
 235                 if test -d "$path"/.git -o -f "$path"/.git
 236                 then
 237                         eval_gettext "Adding existing repo at '\$path' to the index"; echo
 238                 else
 239                         die "$(eval_gettext "'\$path' already exists and is not a valid git repo")"
 240                 fi
 241
 242                 case "$repo" in
 243                 ./*|../*)
 244                         url=$(resolve_relative_url "$repo") || exit
 245                     ;;
 246                 *)
 247                         url="$repo"
 248                         ;;
 249                 esac
 250                 git config submodule."$path".url "$url"
 251         else
 252
 253                 module_clone "$path" "$realrepo" "$reference" || exit
 254                 (
 255                         clear_local_git_env
 256                         cd "$path" &&
 257                         # ash fails to wordsplit ${branch:+-b "$branch"...}
 258                         case "$branch" in
 259                         '') git checkout -f -q ;;
 260                         ?*) git checkout -f -q -B "$branch" "origin/$branch" ;;
 261                         esac
 262                 ) || die "$(eval_gettext "Unable to checkout submodule '\$path'")"
 263         fi
 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 #
 280 cmd_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         module_list |
 305         while read mode sha1 stage path
 306         do
 307                 if test -e "$path"/.git
 308                 then
 309                         say "Entering '$prefix$path'"
 310                         name=$(module_name "$path")
 311                         (
 312                                 prefix="$prefix$path/"
 313                                 clear_local_git_env
 314                                 cd "$path" &&
 315                                 eval "$@" &&
 316                                 if test -n "$recursive"
 317                                 then
 318                                         cmd_foreach "--recursive" "$@"
 319                                 fi
 320                         ) ||
 321                         die "$(eval_gettext "Stopping at '\$path'; script returned non-zero status.")"
 322                 fi
 323         done
 324 }
 325
 326 #
 327 # Register submodules in .git/config
 328 #
 329 # $@ = requested paths (default to all)
 330 #
 331 cmd_init()
 332 {
 333         # parse $args after "submodule ... init".
 334         while test $# -ne 0
 335         do
 336                 case "$1" in
 337                 -q|--quiet)
 338                         GIT_QUIET=1
 339                         ;;
 340                 --)
 341                         shift
 342                         break
 343                         ;;
 344                 -*)
 345                         usage
 346                         ;;
 347                 *)
 348                         break
 349                         ;;
 350                 esac
 351                 shift
 352         done
 353
 354         module_list "$@" |
 355         while read mode sha1 stage path
 356         do
 357                 # Skip already registered paths
 358                 name=$(module_name "$path") || exit
 359                 url=$(git config submodule."$name".url)
 360                 test -z "$url" || continue
 361
 362                 url=$(git config -f .gitmodules submodule."$name".url)
 363                 test -z "$url" &&
 364                 die "$(eval_gettext "No url found for submodule path '\$path' in .gitmodules")"
 365
 366                 # Possibly a url relative to parent
 367                 case "$url" in
 368                 ./*|../*)
 369                         url=$(resolve_relative_url "$url") || exit
 370                         ;;
 371                 esac
 372
 373                 git config submodule."$name".url "$url" ||
 374                 die "$(eval_gettext "Failed to register url for submodule path '\$path'")"
 375
 376                 upd="$(git config -f .gitmodules submodule."$name".update)"
 377                 test -z "$upd" ||
 378                 git config submodule."$name".update "$upd" ||
 379                 die "$(eval_gettext "Failed to register update mode for submodule path '\$path'")"
 380
 381                 say "$(eval_gettext "Submodule '\$name' (\$url) registered for path '\$path'")"
 382         done
 383 }
 384
 385 #
 386 # Update each submodule path to correct revision, using clone and checkout as needed
 387 #
 388 # $@ = requested paths (default to all)
 389 #
 390 cmd_update()
 391 {
 392         # parse $args after "submodule ... update".
 393         orig_flags=
 394         while test $# -ne 0
 395         do
 396                 case "$1" in
 397                 -q|--quiet)
 398                         GIT_QUIET=1
 399                         ;;
 400                 -i|--init)
 401                         init=1
 402                         ;;
 403                 -N|--no-fetch)
 404                         nofetch=1
 405                         ;;
 406                 -f|--force)
 407                         force=$1
 408                         ;;
 409                 -r|--rebase)
 410                         update="rebase"
 411                         ;;
 412                 --reference)
 413                         case "$2" in '') usage ;; esac
 414                         reference="--reference=$2"
 415                         orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 416                         shift
 417                         ;;
 418                 --reference=*)
 419                         reference="$1"
 420                         ;;
 421                 -m|--merge)
 422                         update="merge"
 423                         ;;
 424                 --recursive)
 425                         recursive=1
 426                         ;;
 427                 --)
 428                         shift
 429                         break
 430                         ;;
 431                 -*)
 432                         usage
 433                         ;;
 434                 *)
 435                         break
 436                         ;;
 437                 esac
 438                 orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 439                 shift
 440         done
 441
 442         if test -n "$init"
 443         then
 444                 cmd_init "--" "$@" || return
 445         fi
 446
 447         cloned_modules=
 448         module_list "$@" |
 449         while read mode sha1 stage path
 450         do
 451                 if test "$stage" = U
 452                 then
 453                         echo >&2 "Skipping unmerged submodule $path"
 454                         continue
 455                 fi
 456                 name=$(module_name "$path") || exit
 457                 url=$(git config submodule."$name".url)
 458                 update_module=$(git config submodule."$name".update)
 459                 if test -z "$url"
 460                 then
 461                         # Only mention uninitialized submodules when its
 462                         # path have been specified
 463                         test "$#" != "0" &&
 464                         say "Submodule path '$path' not initialized" &&
 465                         say "Maybe you want to use 'update --init'?"
 466                         continue
 467                 fi
 468
 469                 if ! test -d "$path"/.git -o -f "$path"/.git
 470                 then
 471                         module_clone "$path" "$url" "$reference"|| exit
 472                         cloned_modules="$cloned_modules;$name"
 473                         subsha1=
 474                 else
 475                         subsha1=$(clear_local_git_env; cd "$path" &&
 476                                 git rev-parse --verify HEAD) ||
 477                         die "$(eval_gettext "Unable to find current revision in submodule path '\$path'")"
 478                 fi
 479
 480                 if ! test -z "$update"
 481                 then
 482                         update_module=$update
 483                 fi
 484
 485                 if test "$subsha1" != "$sha1"
 486                 then
 487                         subforce=$force
 488                         # If we don't already have a -f flag and the submodule has never been checked out
 489                         if test -z "$subsha1" -a -z "$force"
 490                         then
 491                                 subforce="-f"
 492                         fi
 493
 494                         if test -z "$nofetch"
 495                         then
 496                                 # Run fetch only if $sha1 isn't present or it
 497                                 # is not reachable from a ref.
 498                                 (clear_local_git_env; cd "$path" &&
 499                                         ((rev=$(git rev-list -n 1 $sha1 --not --all 2>/dev/null) &&
 500                                          test -z "$rev") || git-fetch)) ||
 501                                 die "$(eval_gettext "Unable to fetch in submodule path '\$path'")"
 502                         fi
 503
 504                         # Is this something we just cloned?
 505                         case ";$cloned_modules;" in
 506                         *";$name;"*)
 507                                 # then there is no local change to integrate
 508                                 update_module= ;;
 509                         esac
 510
 511                         case "$update_module" in
 512                         rebase)
 513                                 command="git rebase"
 514                                 action="rebase"
 515                                 msg="rebased onto"
 516                                 ;;
 517                         merge)
 518                                 command="git merge"
 519                                 action="merge"
 520                                 msg="merged in"
 521                                 ;;
 522                         *)
 523                                 command="git checkout $subforce -q"
 524                                 action="checkout"
 525                                 msg="checked out"
 526                                 ;;
 527                         esac
 528
 529                         (clear_local_git_env; cd "$path" && $command "$sha1") ||
 530                         die "Unable to $action '$sha1' in submodule path '$path'"
 531                         say "Submodule path '$path': $msg '$sha1'"
 532                 fi
 533
 534                 if test -n "$recursive"
 535                 then
 536                         (clear_local_git_env; cd "$path" && eval cmd_update "$orig_flags") ||
 537                         die "$(eval_gettext "Failed to recurse into submodule path '\$path'")"
 538                 fi
 539         done
 540 }
 541
 542 set_name_rev () {
 543         revname=$( (
 544                 clear_local_git_env
 545                 cd "$1" && {
 546                         git describe "$2" 2>/dev/null ||
 547                         git describe --tags "$2" 2>/dev/null ||
 548                         git describe --contains "$2" 2>/dev/null ||
 549                         git describe --all --always "$2"
 550                 }
 551         ) )
 552         test -z "$revname" || revname=" ($revname)"
 553 }
 554 #
 555 # Show commit summary for submodules in index or working tree
 556 #
 557 # If '--cached' is given, show summary between index and given commit,
 558 # or between working tree and given commit
 559 #
 560 # $@ = [commit (default 'HEAD'),] requested paths (default all)
 561 #
 562 cmd_summary() {
 563         summary_limit=-1
 564         for_status=
 565         diff_cmd=diff-index
 566
 567         # parse $args after "submodule ... summary".
 568         while test $# -ne 0
 569         do
 570                 case "$1" in
 571                 --cached)
 572                         cached="$1"
 573                         ;;
 574                 --files)
 575                         files="$1"
 576                         ;;
 577                 --for-status)
 578                         for_status="$1"
 579                         ;;
 580                 -n|--summary-limit)
 581                         if summary_limit=$(($2 + 0)) 2>/dev/null && test "$summary_limit" = "$2"
 582                         then
 583                                 :
 584                         else
 585                                 usage
 586                         fi
 587                         shift
 588                         ;;
 589                 --)
 590                         shift
 591                         break
 592                         ;;
 593                 -*)
 594                         usage
 595                         ;;
 596                 *)
 597                         break
 598                         ;;
 599                 esac
 600                 shift
 601         done
 602
 603         test $summary_limit = 0 && return
 604
 605         if rev=$(git rev-parse -q --verify --default HEAD ${1+"$1"})
 606         then
 607                 head=$rev
 608                 test $# = 0 || shift
 609         elif test -z "$1" -o "$1" = "HEAD"
 610         then
 611                 # before the first commit: compare with an empty tree
 612                 head=$(git hash-object -w -t tree --stdin </dev/null)
 613                 test -z "$1" || shift
 614         else
 615                 head="HEAD"
 616         fi
 617
 618         if [ -n "$files" ]
 619         then
 620                 test -n "$cached" &&
 621                 die "--cached cannot be used with --files"
 622                 diff_cmd=diff-files
 623                 head=
 624         fi
 625
 626         cd_to_toplevel
 627         # Get modified modules cared by user
 628         modules=$(git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- "$@" |
 629                 sane_egrep '^:([0-7]* )?160000' |
 630                 while read mod_src mod_dst sha1_src sha1_dst status name
 631                 do
 632                         # Always show modules deleted or type-changed (blob<->module)
 633                         test $status = D -o $status = T && echo "$name" && continue
 634                         # Also show added or modified modules which are checked out
 635                         GIT_DIR="$name/.git" git-rev-parse --git-dir >/dev/null 2>&1 &&
 636                         echo "$name"
 637                 done
 638         )
 639
 640         test -z "$modules" && return
 641
 642         git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- $modules |
 643         sane_egrep '^:([0-7]* )?160000' |
 644         cut -c2- |
 645         while read mod_src mod_dst sha1_src sha1_dst status name
 646         do
 647                 if test -z "$cached" &&
 648                         test $sha1_dst = 0000000000000000000000000000000000000000
 649                 then
 650                         case "$mod_dst" in
 651                         160000)
 652                                 sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
 653                                 ;;
 654                         100644 | 100755 | 120000)
 655                                 sha1_dst=$(git hash-object $name)
 656                                 ;;
 657                         000000)
 658                                 ;; # removed
 659                         *)
 660                                 # unexpected type
 661                                 (
 662                                         eval_gettext "unexpected mode \$mod_dst" &&
 663                                         echo
 664                                 ) >&2
 665                                 continue ;;
 666                         esac
 667                 fi
 668                 missing_src=
 669                 missing_dst=
 670
 671                 test $mod_src = 160000 &&
 672                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_src^0 >/dev/null &&
 673                 missing_src=t
 674
 675                 test $mod_dst = 160000 &&
 676                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_dst^0 >/dev/null &&
 677                 missing_dst=t
 678
 679                 total_commits=
 680                 case "$missing_src,$missing_dst" in
 681                 t,)
 682                         errmsg="  Warn: $name doesn't contain commit $sha1_src"
 683                         ;;
 684                 ,t)
 685                         errmsg="  Warn: $name doesn't contain commit $sha1_dst"
 686                         ;;
 687                 t,t)
 688                         errmsg="  Warn: $name doesn't contain commits $sha1_src and $sha1_dst"
 689                         ;;
 690                 *)
 691                         errmsg=
 692                         total_commits=$(
 693                         if test $mod_src = 160000 -a $mod_dst = 160000
 694                         then
 695                                 range="$sha1_src...$sha1_dst"
 696                         elif test $mod_src = 160000
 697                         then
 698                                 range=$sha1_src
 699                         else
 700                                 range=$sha1_dst
 701                         fi
 702                         GIT_DIR="$name/.git" \
 703                         git rev-list --first-parent $range -- | wc -l
 704                         )
 705                         total_commits=" ($(($total_commits + 0)))"
 706                         ;;
 707                 esac
 708
 709                 sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
 710                 sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
 711                 if test $status = T
 712                 then
 713                         if test $mod_dst = 160000
 714                         then
 715                                 echo "* $name $sha1_abbr_src(blob)->$sha1_abbr_dst(submodule)$total_commits:"
 716                         else
 717                                 echo "* $name $sha1_abbr_src(submodule)->$sha1_abbr_dst(blob)$total_commits:"
 718                         fi
 719                 else
 720                         echo "* $name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
 721                 fi
 722                 if test -n "$errmsg"
 723                 then
 724                         # Don't give error msg for modification whose dst is not submodule
 725                         # i.e. deleted or changed to blob
 726                         test $mod_dst = 160000 && echo "$errmsg"
 727                 else
 728                         if test $mod_src = 160000 -a $mod_dst = 160000
 729                         then
 730                                 limit=
 731                                 test $summary_limit -gt 0 && limit="-$summary_limit"
 732                                 GIT_DIR="$name/.git" \
 733                                 git log $limit --pretty='format:  %m %s' \
 734                                 --first-parent $sha1_src...$sha1_dst
 735                         elif test $mod_dst = 160000
 736                         then
 737                                 GIT_DIR="$name/.git" \
 738                                 git log --pretty='format:  > %s' -1 $sha1_dst
 739                         else
 740                                 GIT_DIR="$name/.git" \
 741                                 git log --pretty='format:  < %s' -1 $sha1_src
 742                         fi
 743                         echo
 744                 fi
 745                 echo
 746         done |
 747         if test -n "$for_status"; then
 748                 if [ -n "$files" ]; then
 749                         echo "# Submodules changed but not updated:"
 750                 else
 751                         echo "# Submodule changes to be committed:"
 752                 fi
 753                 echo "#"
 754                 sed -e 's|^|# |' -e 's|^# $|#|'
 755         else
 756                 cat
 757         fi
 758 }
 759 #
 760 # List all submodules, prefixed with:
 761 #  - submodule not initialized
 762 #  + different revision checked out
 763 #
 764 # If --cached was specified the revision in the index will be printed
 765 # instead of the currently checked out revision.
 766 #
 767 # $@ = requested paths (default to all)
 768 #
 769 cmd_status()
 770 {
 771         # parse $args after "submodule ... status".
 772         orig_flags=
 773         while test $# -ne 0
 774         do
 775                 case "$1" in
 776                 -q|--quiet)
 777                         GIT_QUIET=1
 778                         ;;
 779                 --cached)
 780                         cached=1
 781                         ;;
 782                 --recursive)
 783                         recursive=1
 784                         ;;
 785                 --)
 786                         shift
 787                         break
 788                         ;;
 789                 -*)
 790                         usage
 791                         ;;
 792                 *)
 793                         break
 794                         ;;
 795                 esac
 796                 orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 797                 shift
 798         done
 799
 800         module_list "$@" |
 801         while read mode sha1 stage path
 802         do
 803                 name=$(module_name "$path") || exit
 804                 url=$(git config submodule."$name".url)
 805                 displaypath="$prefix$path"
 806                 if test "$stage" = U
 807                 then
 808                         say "U$sha1 $displaypath"
 809                         continue
 810                 fi
 811                 if test -z "$url" || ! test -d "$path"/.git -o -f "$path"/.git
 812                 then
 813                         say "-$sha1 $displaypath"
 814                         continue;
 815                 fi
 816                 set_name_rev "$path" "$sha1"
 817                 if git diff-files --ignore-submodules=dirty --quiet -- "$path"
 818                 then
 819                         say " $sha1 $displaypath$revname"
 820                 else
 821                         if test -z "$cached"
 822                         then
 823                                 sha1=$(clear_local_git_env; cd "$path" && git rev-parse --verify HEAD)
 824                                 set_name_rev "$path" "$sha1"
 825                         fi
 826                         say "+$sha1 $displaypath$revname"
 827                 fi
 828
 829                 if test -n "$recursive"
 830                 then
 831                         (
 832                                 prefix="$displaypath/"
 833                                 clear_local_git_env
 834                                 cd "$path" &&
 835                                 eval cmd_status "$orig_args"
 836                         ) ||
 837                         die "$(eval_gettext "Failed to recurse into submodule path '\$path'")"
 838                 fi
 839         done
 840 }
 841 #
 842 # Sync remote urls for submodules
 843 # This makes the value for remote.$remote.url match the value
 844 # specified in .gitmodules.
 845 #
 846 cmd_sync()
 847 {
 848         while test $# -ne 0
 849         do
 850                 case "$1" in
 851                 -q|--quiet)
 852                         GIT_QUIET=1
 853                         shift
 854                         ;;
 855                 --)
 856                         shift
 857                         break
 858                         ;;
 859                 -*)
 860                         usage
 861                         ;;
 862                 *)
 863                         break
 864                         ;;
 865                 esac
 866         done
 867         cd_to_toplevel
 868         module_list "$@" |
 869         while read mode sha1 stage path
 870         do
 871                 name=$(module_name "$path")
 872                 url=$(git config -f .gitmodules --get submodule."$name".url)
 873
 874                 # Possibly a url relative to parent
 875                 case "$url" in
 876                 ./*|../*)
 877                         url=$(resolve_relative_url "$url") || exit
 878                         ;;
 879                 esac
 880
 881                 say "$(eval_gettext "Synchronizing submodule url for '\$name'")"
 882                 git config submodule."$name".url "$url"
 883
 884                 if test -e "$path"/.git
 885                 then
 886                 (
 887                         clear_local_git_env
 888                         cd "$path"
 889                         remote=$(get_default_remote)
 890                         git config remote."$remote".url "$url"
 891                 )
 892                 fi
 893         done
 894 }
 895
 896 # This loop parses the command line arguments to find the
 897 # subcommand name to dispatch.  Parsing of the subcommand specific
 898 # options are primarily done by the subcommand implementations.
 899 # Subcommand specific options such as --branch and --cached are
 900 # parsed here as well, for backward compatibility.
 901
 902 while test $# != 0 && test -z "$command"
 903 do
 904         case "$1" in
 905         add | foreach | init | update | status | summary | sync)
 906                 command=$1
 907                 ;;
 908         -q|--quiet)
 909                 GIT_QUIET=1
 910                 ;;
 911         -b|--branch)
 912                 case "$2" in
 913                 '')
 914                         usage
 915                         ;;
 916                 esac
 917                 branch="$2"; shift
 918                 ;;
 919         --cached)
 920                 cached="$1"
 921                 ;;
 922         --)
 923                 break
 924                 ;;
 925         -*)
 926                 usage
 927                 ;;
 928         *)
 929                 break
 930                 ;;
 931         esac
 932         shift
 933 done
 934
 935 # No command word defaults to "status"
 936 test -n "$command" || command=status
 937
 938 # "-b branch" is accepted only by "add"
 939 if test -n "$branch" && test "$command" != add
 940 then
 941         usage
 942 fi
 943
 944 # "--cached" is accepted only by "status" and "summary"
 945 if test -n "$cached" && test "$command" != status -a "$command" != summary
 946 then
 947         usage
 948 fi
 949
 950 "cmd_$command" "$@"