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