git-submodule.sh

   1 #!/bin/sh
   2 #
   3 # git-submodule.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: $dashless [--quiet] sync [--] [<path>...]"
  15 OPTIONS_SPEC=
  16 . git-sh-setup
  17 . git-sh-i18n
  18 . git-parse-remote
  19 require_work_tree
  20
  21 command=
  22 branch=
  23 force=
  24 reference=
  25 cached=
  26 recursive=
  27 init=
  28 files=
  29 nofetch=
  30 update=
  31 prefix=
  32
  33 # The function takes at most 2 arguments. The first argument is the
  34 # URL that navigates to the submodule origin repo. When relative, this URL
  35 # is relative to the superproject origin URL repo. The second up_path
  36 # argument, if specified, is the relative path that navigates
  37 # from the submodule working tree to the superproject working tree.
  38 #
  39 # The output of the function is the origin URL of the submodule.
  40 #
  41 # The output will either be an absolute URL or filesystem path (if the
  42 # superproject origin URL is an absolute URL or filesystem path,
  43 # respectively) or a relative file system path (if the superproject
  44 # origin URL is a relative file system path).
  45 #
  46 # When the output is a relative file system path, the path is either
  47 # relative to the submodule working tree, if up_path is specified, or to
  48 # the superproject working tree otherwise.
  49 resolve_relative_url ()
  50 {
  51         remote=$(get_default_remote)
  52         remoteurl=$(git config "remote.$remote.url") ||
  53                 remoteurl=$(pwd) # the repository is its own authoritative upstream
  54         url="$1"
  55         remoteurl=${remoteurl%/}
  56         sep=/
  57         up_path="$2"
  58
  59         case "$remoteurl" in
  60         *:*|/*)
  61                 is_relative=
  62                 ;;
  63         ./*|../*)
  64                 is_relative=t
  65                 ;;
  66         *)
  67                 is_relative=t
  68                 remoteurl="./$remoteurl"
  69                 ;;
  70         esac
  71
  72         while test -n "$url"
  73         do
  74                 case "$url" in
  75                 ../*)
  76                         url="${url#../}"
  77                         case "$remoteurl" in
  78                         */*)
  79                                 remoteurl="${remoteurl%/*}"
  80                                 ;;
  81                         *:*)
  82                                 remoteurl="${remoteurl%:*}"
  83                                 sep=:
  84                                 ;;
  85                         *)
  86                                 if test -z "$is_relative" || test "." = "$remoteurl"
  87                                 then
  88                                         die "$(eval_gettext "cannot strip one component off url '\$remoteurl'")"
  89                                 else
  90                                         remoteurl=.
  91                                 fi
  92                                 ;;
  93                         esac
  94                         ;;
  95                 ./*)
  96                         url="${url#./}"
  97                         ;;
  98                 *)
  99                         break;;
 100                 esac
 101         done
 102         remoteurl="$remoteurl$sep${url%/}"
 103         echo "${is_relative:+${up_path}}${remoteurl#./}"
 104 }
 105
 106 #
 107 # Get submodule info for registered submodules
 108 # $@ = path to limit submodule list
 109 #
 110 module_list()
 111 {
 112         (
 113                 git ls-files --error-unmatch --stage -- "$@" ||
 114                 echo "unmatched pathspec exists"
 115         ) |
 116         perl -e '
 117         my %unmerged = ();
 118         my ($null_sha1) = ("0" x 40);
 119         my @out = ();
 120         my $unmatched = 0;
 121         while (<STDIN>) {
 122                 if (/^unmatched pathspec/) {
 123                         $unmatched = 1;
 124                         next;
 125                 }
 126                 chomp;
 127                 my ($mode, $sha1, $stage, $path) =
 128                         /^([0-7]+) ([0-9a-f]{40}) ([0-3])\t(.*)$/;
 129                 next unless $mode eq "160000";
 130                 if ($stage ne "0") {
 131                         if (!$unmerged{$path}++) {
 132                                 push @out, "$mode $null_sha1 U\t$path\n";
 133                         }
 134                         next;
 135                 }
 136                 push @out, "$_\n";
 137         }
 138         if ($unmatched) {
 139                 print "#unmatched\n";
 140         } else {
 141                 print for (@out);
 142         }
 143         '
 144 }
 145
 146 die_if_unmatched ()
 147 {
 148         if test "$1" = "#unmatched"
 149         then
 150                 exit 1
 151         fi
 152 }
 153
 154 #
 155 # Map submodule path to submodule name
 156 #
 157 # $1 = path
 158 #
 159 module_name()
 160 {
 161         # Do we have "submodule.<something>.path = $1" defined in .gitmodules file?
 162         sm_path="$1"
 163         re=$(printf '%s\n' "$1" | sed -e 's/[].[^$\\*]/\\&/g')
 164         name=$( git config -f .gitmodules --get-regexp '^submodule\..*\.path$' |
 165                 sed -n -e 's|^submodule\.\(.*\)\.path '"$re"'$|\1|p' )
 166         test -z "$name" &&
 167         die "$(eval_gettext "No submodule mapping found in .gitmodules for path '\$sm_path'")"
 168         echo "$name"
 169 }
 170
 171 #
 172 # Clone a submodule
 173 #
 174 # Prior to calling, cmd_update checks that a possibly existing
 175 # path is not a git repository.
 176 # Likewise, cmd_add checks that path does not exist at all,
 177 # since it is the location of a new submodule.
 178 #
 179 module_clone()
 180 {
 181         sm_path=$1
 182         url=$2
 183         reference="$3"
 184         quiet=
 185         if test -n "$GIT_QUIET"
 186         then
 187                 quiet=-q
 188         fi
 189
 190         gitdir=
 191         gitdir_base=
 192         name=$(module_name "$sm_path" 2>/dev/null)
 193         test -n "$name" || name="$sm_path"
 194         base_name=$(dirname "$name")
 195
 196         gitdir=$(git rev-parse --git-dir)
 197         gitdir_base="$gitdir/modules/$base_name"
 198         gitdir="$gitdir/modules/$name"
 199
 200         if test -d "$gitdir"
 201         then
 202                 mkdir -p "$sm_path"
 203                 rm -f "$gitdir/index"
 204         else
 205                 mkdir -p "$gitdir_base"
 206                 (
 207                         clear_local_git_env
 208                         git clone $quiet -n ${reference:+"$reference"} \
 209                                 --separate-git-dir "$gitdir" "$url" "$sm_path"
 210                 ) ||
 211                 die "$(eval_gettext "Clone of '\$url' into submodule path '\$sm_path' failed")"
 212         fi
 213
 214         # We already are at the root of the work tree but cd_to_toplevel will
 215         # resolve any symlinks that might be present in $PWD
 216         a=$(cd_to_toplevel && cd "$gitdir" && pwd)/
 217         b=$(cd_to_toplevel && cd "$sm_path" && pwd)/
 218         # normalize Windows-style absolute paths to POSIX-style absolute paths
 219         case $a in [a-zA-Z]:/*) a=/${a%%:*}${a#*:} ;; esac
 220         case $b in [a-zA-Z]:/*) b=/${b%%:*}${b#*:} ;; esac
 221         # Remove all common leading directories after a sanity check
 222         if test "${a#$b}" != "$a" || test "${b#$a}" != "$b"; then
 223                 die "$(eval_gettext "Gitdir '\$a' is part of the submodule path '\$b' or vice versa")"
 224         fi
 225         while test "${a%%/*}" = "${b%%/*}"
 226         do
 227                 a=${a#*/}
 228                 b=${b#*/}
 229         done
 230         # Now chop off the trailing '/'s that were added in the beginning
 231         a=${a%/}
 232         b=${b%/}
 233
 234         # Turn each leading "*/" component into "../"
 235         rel=$(echo $b | sed -e 's|[^/][^/]*|..|g')
 236         echo "gitdir: $rel/$a" >"$sm_path/.git"
 237
 238         rel=$(echo $a | sed -e 's|[^/][^/]*|..|g')
 239         (clear_local_git_env; cd "$sm_path" && GIT_WORK_TREE=. git config core.worktree "$rel/$b")
 240 }
 241
 242 #
 243 # Add a new submodule to the working tree, .gitmodules and the index
 244 #
 245 # $@ = repo path
 246 #
 247 # optional branch is stored in global branch variable
 248 #
 249 cmd_add()
 250 {
 251         # parse $args after "submodule ... add".
 252         while test $# -ne 0
 253         do
 254                 case "$1" in
 255                 -b | --branch)
 256                         case "$2" in '') usage ;; esac
 257                         branch=$2
 258                         shift
 259                         ;;
 260                 -f | --force)
 261                         force=$1
 262                         ;;
 263                 -q|--quiet)
 264                         GIT_QUIET=1
 265                         ;;
 266                 --reference)
 267                         case "$2" in '') usage ;; esac
 268                         reference="--reference=$2"
 269                         shift
 270                         ;;
 271                 --reference=*)
 272                         reference="$1"
 273                         shift
 274                         ;;
 275                 --)
 276                         shift
 277                         break
 278                         ;;
 279                 -*)
 280                         usage
 281                         ;;
 282                 *)
 283                         break
 284                         ;;
 285                 esac
 286                 shift
 287         done
 288
 289         repo=$1
 290         sm_path=$2
 291
 292         if test -z "$sm_path"; then
 293                 sm_path=$(echo "$repo" |
 294                         sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
 295         fi
 296
 297         if test -z "$repo" -o -z "$sm_path"; then
 298                 usage
 299         fi
 300
 301         # assure repo is absolute or relative to parent
 302         case "$repo" in
 303         ./*|../*)
 304                 # dereference source url relative to parent's url
 305                 realrepo=$(resolve_relative_url "$repo") || exit
 306                 ;;
 307         *:*|/*)
 308                 # absolute url
 309                 realrepo=$repo
 310                 ;;
 311         *)
 312                 die "$(eval_gettext "repo URL: '\$repo' must be absolute or begin with ./|../")"
 313         ;;
 314         esac
 315
 316         # normalize path:
 317         # multiple //; leading ./; /./; /../; trailing /
 318         sm_path=$(printf '%s/\n' "$sm_path" |
 319                 sed -e '
 320                         s|//*|/|g
 321                         s|^\(\./\)*||
 322                         s|/\./|/|g
 323                         :start
 324                         s|\([^/]*\)/\.\./||
 325                         tstart
 326                         s|/*$||
 327                 ')
 328         git ls-files --error-unmatch "$sm_path" > /dev/null 2>&1 &&
 329         die "$(eval_gettext "'\$sm_path' already exists in the index")"
 330
 331         if test -z "$force" && ! git add --dry-run --ignore-missing "$sm_path" > /dev/null 2>&1
 332         then
 333                 eval_gettextln "The following path is ignored by one of your .gitignore files:
 334 \$sm_path
 335 Use -f if you really want to add it." >&2
 336                 exit 1
 337         fi
 338
 339         # perhaps the path exists and is already a git repo, else clone it
 340         if test -e "$sm_path"
 341         then
 342                 if test -d "$sm_path"/.git -o -f "$sm_path"/.git
 343                 then
 344                         eval_gettextln "Adding existing repo at '\$sm_path' to the index"
 345                 else
 346                         die "$(eval_gettext "'\$sm_path' already exists and is not a valid git repo")"
 347                 fi
 348
 349         else
 350
 351                 module_clone "$sm_path" "$realrepo" "$reference" || exit
 352                 (
 353                         clear_local_git_env
 354                         cd "$sm_path" &&
 355                         # ash fails to wordsplit ${branch:+-b "$branch"...}
 356                         case "$branch" in
 357                         '') git checkout -f -q ;;
 358                         ?*) git checkout -f -q -B "$branch" "origin/$branch" ;;
 359                         esac
 360                 ) || die "$(eval_gettext "Unable to checkout submodule '\$sm_path'")"
 361         fi
 362         git config submodule."$sm_path".url "$realrepo"
 363
 364         git add $force "$sm_path" ||
 365         die "$(eval_gettext "Failed to add submodule '\$sm_path'")"
 366
 367         git config -f .gitmodules submodule."$sm_path".path "$sm_path" &&
 368         git config -f .gitmodules submodule."$sm_path".url "$repo" &&
 369         git add --force .gitmodules ||
 370         die "$(eval_gettext "Failed to register submodule '\$sm_path'")"
 371 }
 372
 373 #
 374 # Execute an arbitrary command sequence in each checked out
 375 # submodule
 376 #
 377 # $@ = command to execute
 378 #
 379 cmd_foreach()
 380 {
 381         # parse $args after "submodule ... foreach".
 382         while test $# -ne 0
 383         do
 384                 case "$1" in
 385                 -q|--quiet)
 386                         GIT_QUIET=1
 387                         ;;
 388                 --recursive)
 389                         recursive=1
 390                         ;;
 391                 -*)
 392                         usage
 393                         ;;
 394                 *)
 395                         break
 396                         ;;
 397                 esac
 398                 shift
 399         done
 400
 401         toplevel=$(pwd)
 402
 403         # dup stdin so that it can be restored when running the external
 404         # command in the subshell (and a recursive call to this function)
 405         exec 3<&0
 406
 407         module_list |
 408         while read mode sha1 stage sm_path
 409         do
 410                 die_if_unmatched "$mode"
 411                 if test -e "$sm_path"/.git
 412                 then
 413                         say "$(eval_gettext "Entering '\$prefix\$sm_path'")"
 414                         name=$(module_name "$sm_path")
 415                         (
 416                                 prefix="$prefix$sm_path/"
 417                                 clear_local_git_env
 418                                 # we make $path available to scripts ...
 419                                 path=$sm_path
 420                                 cd "$sm_path" &&
 421                                 eval "$@" &&
 422                                 if test -n "$recursive"
 423                                 then
 424                                         cmd_foreach "--recursive" "$@"
 425                                 fi
 426                         ) <&3 3<&- ||
 427                         die "$(eval_gettext "Stopping at '\$sm_path'; script returned non-zero status.")"
 428                 fi
 429         done
 430 }
 431
 432 #
 433 # Register submodules in .git/config
 434 #
 435 # $@ = requested paths (default to all)
 436 #
 437 cmd_init()
 438 {
 439         # parse $args after "submodule ... init".
 440         while test $# -ne 0
 441         do
 442                 case "$1" in
 443                 -q|--quiet)
 444                         GIT_QUIET=1
 445                         ;;
 446                 --)
 447                         shift
 448                         break
 449                         ;;
 450                 -*)
 451                         usage
 452                         ;;
 453                 *)
 454                         break
 455                         ;;
 456                 esac
 457                 shift
 458         done
 459
 460         module_list "$@" |
 461         while read mode sha1 stage sm_path
 462         do
 463                 die_if_unmatched "$mode"
 464                 name=$(module_name "$sm_path") || exit
 465
 466                 # Copy url setting when it is not set yet
 467                 if test -z "$(git config "submodule.$name.url")"
 468                 then
 469                         url=$(git config -f .gitmodules submodule."$name".url)
 470                         test -z "$url" &&
 471                         die "$(eval_gettext "No url found for submodule path '\$sm_path' in .gitmodules")"
 472
 473                         # Possibly a url relative to parent
 474                         case "$url" in
 475                         ./*|../*)
 476                                 url=$(resolve_relative_url "$url") || exit
 477                                 ;;
 478                         esac
 479                         git config submodule."$name".url "$url" ||
 480                         die "$(eval_gettext "Failed to register url for submodule path '\$sm_path'")"
 481
 482                         say "$(eval_gettext "Submodule '\$name' (\$url) registered for path '\$sm_path'")"
 483                 fi
 484
 485                 # Copy "update" setting when it is not set yet
 486                 upd="$(git config -f .gitmodules submodule."$name".update)"
 487                 test -z "$upd" ||
 488                 test -n "$(git config submodule."$name".update)" ||
 489                 git config submodule."$name".update "$upd" ||
 490                 die "$(eval_gettext "Failed to register update mode for submodule path '\$sm_path'")"
 491         done
 492 }
 493
 494 #
 495 # Update each submodule path to correct revision, using clone and checkout as needed
 496 #
 497 # $@ = requested paths (default to all)
 498 #
 499 cmd_update()
 500 {
 501         # parse $args after "submodule ... update".
 502         orig_flags=
 503         while test $# -ne 0
 504         do
 505                 case "$1" in
 506                 -q|--quiet)
 507                         GIT_QUIET=1
 508                         ;;
 509                 -i|--init)
 510                         init=1
 511                         ;;
 512                 -N|--no-fetch)
 513                         nofetch=1
 514                         ;;
 515                 -f|--force)
 516                         force=$1
 517                         ;;
 518                 -r|--rebase)
 519                         update="rebase"
 520                         ;;
 521                 --reference)
 522                         case "$2" in '') usage ;; esac
 523                         reference="--reference=$2"
 524                         orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 525                         shift
 526                         ;;
 527                 --reference=*)
 528                         reference="$1"
 529                         ;;
 530                 -m|--merge)
 531                         update="merge"
 532                         ;;
 533                 --recursive)
 534                         recursive=1
 535                         ;;
 536                 --checkout)
 537                         update="checkout"
 538                         ;;
 539                 --)
 540                         shift
 541                         break
 542                         ;;
 543                 -*)
 544                         usage
 545                         ;;
 546                 *)
 547                         break
 548                         ;;
 549                 esac
 550                 orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 551                 shift
 552         done
 553
 554         if test -n "$init"
 555         then
 556                 cmd_init "--" "$@" || return
 557         fi
 558
 559         cloned_modules=
 560         module_list "$@" | {
 561         err=
 562         while read mode sha1 stage sm_path
 563         do
 564                 die_if_unmatched "$mode"
 565                 if test "$stage" = U
 566                 then
 567                         echo >&2 "Skipping unmerged submodule $sm_path"
 568                         continue
 569                 fi
 570                 name=$(module_name "$sm_path") || exit
 571                 url=$(git config submodule."$name".url)
 572                 if ! test -z "$update"
 573                 then
 574                         update_module=$update
 575                 else
 576                         update_module=$(git config submodule."$name".update)
 577                 fi
 578
 579                 if test "$update_module" = "none"
 580                 then
 581                         echo "Skipping submodule '$sm_path'"
 582                         continue
 583                 fi
 584
 585                 if test -z "$url"
 586                 then
 587                         # Only mention uninitialized submodules when its
 588                         # path have been specified
 589                         test "$#" != "0" &&
 590                         say "$(eval_gettext "Submodule path '\$sm_path' not initialized
 591 Maybe you want to use 'update --init'?")"
 592                         continue
 593                 fi
 594
 595                 if ! test -d "$sm_path"/.git -o -f "$sm_path"/.git
 596                 then
 597                         module_clone "$sm_path" "$url" "$reference"|| exit
 598                         cloned_modules="$cloned_modules;$name"
 599                         subsha1=
 600                 else
 601                         subsha1=$(clear_local_git_env; cd "$sm_path" &&
 602                                 git rev-parse --verify HEAD) ||
 603                         die "$(eval_gettext "Unable to find current revision in submodule path '\$sm_path'")"
 604                 fi
 605
 606                 if test "$subsha1" != "$sha1" -o -n "$force"
 607                 then
 608                         subforce=$force
 609                         # If we don't already have a -f flag and the submodule has never been checked out
 610                         if test -z "$subsha1" -a -z "$force"
 611                         then
 612                                 subforce="-f"
 613                         fi
 614
 615                         if test -z "$nofetch"
 616                         then
 617                                 # Run fetch only if $sha1 isn't present or it
 618                                 # is not reachable from a ref.
 619                                 (clear_local_git_env; cd "$sm_path" &&
 620                                         ( (rev=$(git rev-list -n 1 $sha1 --not --all 2>/dev/null) &&
 621                                          test -z "$rev") || git-fetch)) ||
 622                                 die "$(eval_gettext "Unable to fetch in submodule path '\$sm_path'")"
 623                         fi
 624
 625                         # Is this something we just cloned?
 626                         case ";$cloned_modules;" in
 627                         *";$name;"*)
 628                                 # then there is no local change to integrate
 629                                 update_module= ;;
 630                         esac
 631
 632                         must_die_on_failure=
 633                         case "$update_module" in
 634                         rebase)
 635                                 command="git rebase"
 636                                 die_msg="$(eval_gettext "Unable to rebase '\$sha1' in submodule path '\$sm_path'")"
 637                                 say_msg="$(eval_gettext "Submodule path '\$sm_path': rebased into '\$sha1'")"
 638                                 must_die_on_failure=yes
 639                                 ;;
 640                         merge)
 641                                 command="git merge"
 642                                 die_msg="$(eval_gettext "Unable to merge '\$sha1' in submodule path '\$sm_path'")"
 643                                 say_msg="$(eval_gettext "Submodule path '\$sm_path': merged in '\$sha1'")"
 644                                 must_die_on_failure=yes
 645                                 ;;
 646                         *)
 647                                 command="git checkout $subforce -q"
 648                                 die_msg="$(eval_gettext "Unable to checkout '\$sha1' in submodule path '\$sm_path'")"
 649                                 say_msg="$(eval_gettext "Submodule path '\$sm_path': checked out '\$sha1'")"
 650                                 ;;
 651                         esac
 652
 653                         if (clear_local_git_env; cd "$sm_path" && $command "$sha1")
 654                         then
 655                                 say "$say_msg"
 656                         elif test -n "$must_die_on_failure"
 657                         then
 658                                 die_with_status 2 "$die_msg"
 659                         else
 660                                 err="${err};$die_msg"
 661                                 continue
 662                         fi
 663                 fi
 664
 665                 if test -n "$recursive"
 666                 then
 667                         (clear_local_git_env; cd "$sm_path" && eval cmd_update "$orig_flags")
 668                         res=$?
 669                         if test $res -gt 0
 670                         then
 671                                 die_msg="$(eval_gettext "Failed to recurse into submodule path '\$sm_path'")"
 672                                 if test $res -eq 1
 673                                 then
 674                                         err="${err};$die_msg"
 675                                         continue
 676                                 else
 677                                         die_with_status $res "$die_msg"
 678                                 fi
 679                         fi
 680                 fi
 681         done
 682
 683         if test -n "$err"
 684         then
 685                 OIFS=$IFS
 686                 IFS=';'
 687                 for e in $err
 688                 do
 689                         if test -n "$e"
 690                         then
 691                                 echo >&2 "$e"
 692                         fi
 693                 done
 694                 IFS=$OIFS
 695                 exit 1
 696         fi
 697         }
 698 }
 699
 700 set_name_rev () {
 701         revname=$( (
 702                 clear_local_git_env
 703                 cd "$1" && {
 704                         git describe "$2" 2>/dev/null ||
 705                         git describe --tags "$2" 2>/dev/null ||
 706                         git describe --contains "$2" 2>/dev/null ||
 707                         git describe --all --always "$2"
 708                 }
 709         ) )
 710         test -z "$revname" || revname=" ($revname)"
 711 }
 712 #
 713 # Show commit summary for submodules in index or working tree
 714 #
 715 # If '--cached' is given, show summary between index and given commit,
 716 # or between working tree and given commit
 717 #
 718 # $@ = [commit (default 'HEAD'),] requested paths (default all)
 719 #
 720 cmd_summary() {
 721         summary_limit=-1
 722         for_status=
 723         diff_cmd=diff-index
 724
 725         # parse $args after "submodule ... summary".
 726         while test $# -ne 0
 727         do
 728                 case "$1" in
 729                 --cached)
 730                         cached="$1"
 731                         ;;
 732                 --files)
 733                         files="$1"
 734                         ;;
 735                 --for-status)
 736                         for_status="$1"
 737                         ;;
 738                 -n|--summary-limit)
 739                         if summary_limit=$(($2 + 0)) 2>/dev/null && test "$summary_limit" = "$2"
 740                         then
 741                                 :
 742                         else
 743                                 usage
 744                         fi
 745                         shift
 746                         ;;
 747                 --)
 748                         shift
 749                         break
 750                         ;;
 751                 -*)
 752                         usage
 753                         ;;
 754                 *)
 755                         break
 756                         ;;
 757                 esac
 758                 shift
 759         done
 760
 761         test $summary_limit = 0 && return
 762
 763         if rev=$(git rev-parse -q --verify --default HEAD ${1+"$1"})
 764         then
 765                 head=$rev
 766                 test $# = 0 || shift
 767         elif test -z "$1" -o "$1" = "HEAD"
 768         then
 769                 # before the first commit: compare with an empty tree
 770                 head=$(git hash-object -w -t tree --stdin </dev/null)
 771                 test -z "$1" || shift
 772         else
 773                 head="HEAD"
 774         fi
 775
 776         if [ -n "$files" ]
 777         then
 778                 test -n "$cached" &&
 779                 die "$(gettext "The --cached option cannot be used with the --files option")"
 780                 diff_cmd=diff-files
 781                 head=
 782         fi
 783
 784         cd_to_toplevel
 785         # Get modified modules cared by user
 786         modules=$(git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- "$@" |
 787                 sane_egrep '^:([0-7]* )?160000' |
 788                 while read mod_src mod_dst sha1_src sha1_dst status name
 789                 do
 790                         # Always show modules deleted or type-changed (blob<->module)
 791                         test $status = D -o $status = T && echo "$name" && continue
 792                         # Also show added or modified modules which are checked out
 793                         GIT_DIR="$name/.git" git-rev-parse --git-dir >/dev/null 2>&1 &&
 794                         echo "$name"
 795                 done
 796         )
 797
 798         test -z "$modules" && return
 799
 800         git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- $modules |
 801         sane_egrep '^:([0-7]* )?160000' |
 802         cut -c2- |
 803         while read mod_src mod_dst sha1_src sha1_dst status name
 804         do
 805                 if test -z "$cached" &&
 806                         test $sha1_dst = 0000000000000000000000000000000000000000
 807                 then
 808                         case "$mod_dst" in
 809                         160000)
 810                                 sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
 811                                 ;;
 812                         100644 | 100755 | 120000)
 813                                 sha1_dst=$(git hash-object $name)
 814                                 ;;
 815                         000000)
 816                                 ;; # removed
 817                         *)
 818                                 # unexpected type
 819                                 eval_gettextln "unexpected mode \$mod_dst" >&2
 820                                 continue ;;
 821                         esac
 822                 fi
 823                 missing_src=
 824                 missing_dst=
 825
 826                 test $mod_src = 160000 &&
 827                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_src^0 >/dev/null &&
 828                 missing_src=t
 829
 830                 test $mod_dst = 160000 &&
 831                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_dst^0 >/dev/null &&
 832                 missing_dst=t
 833
 834                 total_commits=
 835                 case "$missing_src,$missing_dst" in
 836                 t,)
 837                         errmsg="$(eval_gettext "  Warn: \$name doesn't contain commit \$sha1_src")"
 838                         ;;
 839                 ,t)
 840                         errmsg="$(eval_gettext "  Warn: \$name doesn't contain commit \$sha1_dst")"
 841                         ;;
 842                 t,t)
 843                         errmsg="$(eval_gettext "  Warn: \$name doesn't contain commits \$sha1_src and \$sha1_dst")"
 844                         ;;
 845                 *)
 846                         errmsg=
 847                         total_commits=$(
 848                         if test $mod_src = 160000 -a $mod_dst = 160000
 849                         then
 850                                 range="$sha1_src...$sha1_dst"
 851                         elif test $mod_src = 160000
 852                         then
 853                                 range=$sha1_src
 854                         else
 855                                 range=$sha1_dst
 856                         fi
 857                         GIT_DIR="$name/.git" \
 858                         git rev-list --first-parent $range -- | wc -l
 859                         )
 860                         total_commits=" ($(($total_commits + 0)))"
 861                         ;;
 862                 esac
 863
 864                 sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
 865                 sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
 866                 if test $status = T
 867                 then
 868                         blob="$(gettext "blob")"
 869                         submodule="$(gettext "submodule")"
 870                         if test $mod_dst = 160000
 871                         then
 872                                 echo "* $name $sha1_abbr_src($blob)->$sha1_abbr_dst($submodule)$total_commits:"
 873                         else
 874                                 echo "* $name $sha1_abbr_src($submodule)->$sha1_abbr_dst($blob)$total_commits:"
 875                         fi
 876                 else
 877                         echo "* $name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
 878                 fi
 879                 if test -n "$errmsg"
 880                 then
 881                         # Don't give error msg for modification whose dst is not submodule
 882                         # i.e. deleted or changed to blob
 883                         test $mod_dst = 160000 && echo "$errmsg"
 884                 else
 885                         if test $mod_src = 160000 -a $mod_dst = 160000
 886                         then
 887                                 limit=
 888                                 test $summary_limit -gt 0 && limit="-$summary_limit"
 889                                 GIT_DIR="$name/.git" \
 890                                 git log $limit --pretty='format:  %m %s' \
 891                                 --first-parent $sha1_src...$sha1_dst
 892                         elif test $mod_dst = 160000
 893                         then
 894                                 GIT_DIR="$name/.git" \
 895                                 git log --pretty='format:  > %s' -1 $sha1_dst
 896                         else
 897                                 GIT_DIR="$name/.git" \
 898                                 git log --pretty='format:  < %s' -1 $sha1_src
 899                         fi
 900                         echo
 901                 fi
 902                 echo
 903         done |
 904         if test -n "$for_status"; then
 905                 if [ -n "$files" ]; then
 906                         gettextln "# Submodules changed but not updated:"
 907                 else
 908                         gettextln "# Submodule changes to be committed:"
 909                 fi
 910                 echo "#"
 911                 sed -e 's|^|# |' -e 's|^# $|#|'
 912         else
 913                 cat
 914         fi
 915 }
 916 #
 917 # List all submodules, prefixed with:
 918 #  - submodule not initialized
 919 #  + different revision checked out
 920 #
 921 # If --cached was specified the revision in the index will be printed
 922 # instead of the currently checked out revision.
 923 #
 924 # $@ = requested paths (default to all)
 925 #
 926 cmd_status()
 927 {
 928         # parse $args after "submodule ... status".
 929         orig_flags=
 930         while test $# -ne 0
 931         do
 932                 case "$1" in
 933                 -q|--quiet)
 934                         GIT_QUIET=1
 935                         ;;
 936                 --cached)
 937                         cached=1
 938                         ;;
 939                 --recursive)
 940                         recursive=1
 941                         ;;
 942                 --)
 943                         shift
 944                         break
 945                         ;;
 946                 -*)
 947                         usage
 948                         ;;
 949                 *)
 950                         break
 951                         ;;
 952                 esac
 953                 orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 954                 shift
 955         done
 956
 957         module_list "$@" |
 958         while read mode sha1 stage sm_path
 959         do
 960                 die_if_unmatched "$mode"
 961                 name=$(module_name "$sm_path") || exit
 962                 url=$(git config submodule."$name".url)
 963                 displaypath="$prefix$sm_path"
 964                 if test "$stage" = U
 965                 then
 966                         say "U$sha1 $displaypath"
 967                         continue
 968                 fi
 969                 if test -z "$url" || ! test -d "$sm_path"/.git -o -f "$sm_path"/.git
 970                 then
 971                         say "-$sha1 $displaypath"
 972                         continue;
 973                 fi
 974                 set_name_rev "$sm_path" "$sha1"
 975                 if git diff-files --ignore-submodules=dirty --quiet -- "$sm_path"
 976                 then
 977                         say " $sha1 $displaypath$revname"
 978                 else
 979                         if test -z "$cached"
 980                         then
 981                                 sha1=$(clear_local_git_env; cd "$sm_path" && git rev-parse --verify HEAD)
 982                                 set_name_rev "$sm_path" "$sha1"
 983                         fi
 984                         say "+$sha1 $displaypath$revname"
 985                 fi
 986
 987                 if test -n "$recursive"
 988                 then
 989                         (
 990                                 prefix="$displaypath/"
 991                                 clear_local_git_env
 992                                 cd "$sm_path" &&
 993                                 eval cmd_status "$orig_args"
 994                         ) ||
 995                         die "$(eval_gettext "Failed to recurse into submodule path '\$sm_path'")"
 996                 fi
 997         done
 998 }
 999 #
1000 # Sync remote urls for submodules
1001 # This makes the value for remote.$remote.url match the value
1002 # specified in .gitmodules.
1003 #
1004 cmd_sync()
1005 {
1006         while test $# -ne 0
1007         do
1008                 case "$1" in
1009                 -q|--quiet)
1010                         GIT_QUIET=1
1011                         shift
1012                         ;;
1013                 --)
1014                         shift
1015                         break
1016                         ;;
1017                 -*)
1018                         usage
1019                         ;;
1020                 *)
1021                         break
1022                         ;;
1023                 esac
1024         done
1025         cd_to_toplevel
1026         module_list "$@" |
1027         while read mode sha1 stage sm_path
1028         do
1029                 die_if_unmatched "$mode"
1030                 name=$(module_name "$sm_path")
1031                 url=$(git config -f .gitmodules --get submodule."$name".url)
1032
1033                 # Possibly a url relative to parent
1034                 case "$url" in
1035                 ./*|../*)
1036                         # rewrite foo/bar as ../.. to find path from
1037                         # submodule work tree to superproject work tree
1038                         up_path="$(echo "$sm_path" | sed "s/[^/][^/]*/../g")" &&
1039                         # guarantee a trailing /
1040                         up_path=${up_path%/}/ &&
1041                         # path from submodule work tree to submodule origin repo
1042                         sub_origin_url=$(resolve_relative_url "$url" "$up_path") &&
1043                         # path from superproject work tree to submodule origin repo
1044                         super_config_url=$(resolve_relative_url "$url") || exit
1045                         ;;
1046                 *)
1047                         sub_origin_url="$url"
1048                         super_config_url="$url"
1049                         ;;
1050                 esac
1051
1052                 if git config "submodule.$name.url" >/dev/null 2>/dev/null
1053                 then
1054                         say "$(eval_gettext "Synchronizing submodule url for '\$name'")"
1055                         git config submodule."$name".url "$super_config_url"
1056
1057                         if test -e "$sm_path"/.git
1058                         then
1059                         (
1060                                 clear_local_git_env
1061                                 cd "$sm_path"
1062                                 remote=$(get_default_remote)
1063                                 git config remote."$remote".url "$sub_origin_url"
1064                         )
1065                         fi
1066                 fi
1067         done
1068 }
1069
1070 # This loop parses the command line arguments to find the
1071 # subcommand name to dispatch.  Parsing of the subcommand specific
1072 # options are primarily done by the subcommand implementations.
1073 # Subcommand specific options such as --branch and --cached are
1074 # parsed here as well, for backward compatibility.
1075
1076 while test $# != 0 && test -z "$command"
1077 do
1078         case "$1" in
1079         add | foreach | init | update | status | summary | sync)
1080                 command=$1
1081                 ;;
1082         -q|--quiet)
1083                 GIT_QUIET=1
1084                 ;;
1085         -b|--branch)
1086                 case "$2" in
1087                 '')
1088                         usage
1089                         ;;
1090                 esac
1091                 branch="$2"; shift
1092                 ;;
1093         --cached)
1094                 cached="$1"
1095                 ;;
1096         --)
1097                 break
1098                 ;;
1099         -*)
1100                 usage
1101                 ;;
1102         *)
1103                 break
1104                 ;;
1105         esac
1106         shift
1107 done
1108
1109 # No command word defaults to "status"
1110 if test -z "$command"
1111 then
1112     if test $# = 0
1113     then
1114         command=status
1115     else
1116         usage
1117     fi
1118 fi
1119
1120 # "-b branch" is accepted only by "add"
1121 if test -n "$branch" && test "$command" != add
1122 then
1123         usage
1124 fi
1125
1126 # "--cached" is accepted only by "status" and "summary"
1127 if test -n "$cached" && test "$command" != status -a "$command" != summary
1128 then
1129         usage
1130 fi
1131
1132 "cmd_$command" "$@"