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 "$sm_path" && pwd)/
 218         # Remove all common leading directories after a sanity check
 219         if test "${a#$b}" != "$a" || test "${b#$a}" != "$b"; then
 220                 die "$(eval_gettext "Gitdir '\$a' is part of the submodule path '\$b' or vice versa")"
 221         fi
 222         while test "${a%%/*}" = "${b%%/*}"
 223         do
 224                 a=${a#*/}
 225                 b=${b#*/}
 226         done
 227         # Now chop off the trailing '/'s that were added in the beginning
 228         a=${a%/}
 229         b=${b%/}
 230
 231         # Turn each leading "*/" component into "../"
 232         rel=$(echo $b | sed -e 's|[^/][^/]*|..|g')
 233         echo "gitdir: $rel/$a" >"$sm_path/.git"
 234
 235         rel=$(echo $a | sed -e 's|[^/][^/]*|..|g')
 236         (clear_local_git_env; cd "$sm_path" && GIT_WORK_TREE=. git config core.worktree "$rel/$b")
 237 }
 238
 239 #
 240 # Add a new submodule to the working tree, .gitmodules and the index
 241 #
 242 # $@ = repo path
 243 #
 244 # optional branch is stored in global branch variable
 245 #
 246 cmd_add()
 247 {
 248         # parse $args after "submodule ... add".
 249         while test $# -ne 0
 250         do
 251                 case "$1" in
 252                 -b | --branch)
 253                         case "$2" in '') usage ;; esac
 254                         branch=$2
 255                         shift
 256                         ;;
 257                 -f | --force)
 258                         force=$1
 259                         ;;
 260                 -q|--quiet)
 261                         GIT_QUIET=1
 262                         ;;
 263                 --reference)
 264                         case "$2" in '') usage ;; esac
 265                         reference="--reference=$2"
 266                         shift
 267                         ;;
 268                 --reference=*)
 269                         reference="$1"
 270                         shift
 271                         ;;
 272                 --)
 273                         shift
 274                         break
 275                         ;;
 276                 -*)
 277                         usage
 278                         ;;
 279                 *)
 280                         break
 281                         ;;
 282                 esac
 283                 shift
 284         done
 285
 286         repo=$1
 287         sm_path=$2
 288
 289         if test -z "$sm_path"; then
 290                 sm_path=$(echo "$repo" |
 291                         sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
 292         fi
 293
 294         if test -z "$repo" -o -z "$sm_path"; then
 295                 usage
 296         fi
 297
 298         # assure repo is absolute or relative to parent
 299         case "$repo" in
 300         ./*|../*)
 301                 # dereference source url relative to parent's url
 302                 realrepo=$(resolve_relative_url "$repo") || exit
 303                 ;;
 304         *:*|/*)
 305                 # absolute url
 306                 realrepo=$repo
 307                 ;;
 308         *)
 309                 die "$(eval_gettext "repo URL: '\$repo' must be absolute or begin with ./|../")"
 310         ;;
 311         esac
 312
 313         # normalize path:
 314         # multiple //; leading ./; /./; /../; trailing /
 315         sm_path=$(printf '%s/\n' "$sm_path" |
 316                 sed -e '
 317                         s|//*|/|g
 318                         s|^\(\./\)*||
 319                         s|/\./|/|g
 320                         :start
 321                         s|\([^/]*\)/\.\./||
 322                         tstart
 323                         s|/*$||
 324                 ')
 325         git ls-files --error-unmatch "$sm_path" > /dev/null 2>&1 &&
 326         die "$(eval_gettext "'\$sm_path' already exists in the index")"
 327
 328         if test -z "$force" && ! git add --dry-run --ignore-missing "$sm_path" > /dev/null 2>&1
 329         then
 330                 cat >&2 <<EOF
 331 The following path is ignored by one of your .gitignore files:
 332 $(eval_gettextln $sm_path)
 333 Use -f if you really want to add it.
 334 EOF
 335                 exit 1
 336         fi
 337
 338         # perhaps the path exists and is already a git repo, else clone it
 339         if test -e "$sm_path"
 340         then
 341                 if test -d "$sm_path"/.git -o -f "$sm_path"/.git
 342                 then
 343                         eval_gettextln "Adding existing repo at '\$sm_path' to the index"
 344                 else
 345                         die "$(eval_gettext "'\$sm_path' already exists and is not a valid git repo")"
 346                 fi
 347
 348         else
 349
 350                 module_clone "$sm_path" "$realrepo" "$reference" || exit
 351                 (
 352                         clear_local_git_env
 353                         cd "$sm_path" &&
 354                         # ash fails to wordsplit ${branch:+-b "$branch"...}
 355                         case "$branch" in
 356                         '') git checkout -f -q ;;
 357                         ?*) git checkout -f -q -B "$branch" "origin/$branch" ;;
 358                         esac
 359                 ) || die "$(eval_gettext "Unable to checkout submodule '\$sm_path'")"
 360         fi
 361         git config submodule."$sm_path".url "$realrepo"
 362
 363         git add $force "$sm_path" ||
 364         die "$(eval_gettext "Failed to add submodule '\$sm_path'")"
 365
 366         git config -f .gitmodules submodule."$sm_path".path "$sm_path" &&
 367         git config -f .gitmodules submodule."$sm_path".url "$repo" &&
 368         git add --force .gitmodules ||
 369         die "$(eval_gettext "Failed to register submodule '\$sm_path'")"
 370 }
 371
 372 #
 373 # Execute an arbitrary command sequence in each checked out
 374 # submodule
 375 #
 376 # $@ = command to execute
 377 #
 378 cmd_foreach()
 379 {
 380         # parse $args after "submodule ... foreach".
 381         while test $# -ne 0
 382         do
 383                 case "$1" in
 384                 -q|--quiet)
 385                         GIT_QUIET=1
 386                         ;;
 387                 --recursive)
 388                         recursive=1
 389                         ;;
 390                 -*)
 391                         usage
 392                         ;;
 393                 *)
 394                         break
 395                         ;;
 396                 esac
 397                 shift
 398         done
 399
 400         toplevel=$(pwd)
 401
 402         # dup stdin so that it can be restored when running the external
 403         # command in the subshell (and a recursive call to this function)
 404         exec 3<&0
 405
 406         module_list |
 407         while read mode sha1 stage sm_path
 408         do
 409                 die_if_unmatched "$mode"
 410                 if test -e "$sm_path"/.git
 411                 then
 412                         say "$(eval_gettext "Entering '\$prefix\$sm_path'")"
 413                         name=$(module_name "$sm_path")
 414                         (
 415                                 prefix="$prefix$sm_path/"
 416                                 clear_local_git_env
 417                                 # we make $path available to scripts ...
 418                                 path=$sm_path
 419                                 cd "$sm_path" &&
 420                                 eval "$@" &&
 421                                 if test -n "$recursive"
 422                                 then
 423                                         cmd_foreach "--recursive" "$@"
 424                                 fi
 425                         ) <&3 3<&- ||
 426                         die "$(eval_gettext "Stopping at '\$sm_path'; script returned non-zero status.")"
 427                 fi
 428         done
 429 }
 430
 431 #
 432 # Register submodules in .git/config
 433 #
 434 # $@ = requested paths (default to all)
 435 #
 436 cmd_init()
 437 {
 438         # parse $args after "submodule ... init".
 439         while test $# -ne 0
 440         do
 441                 case "$1" in
 442                 -q|--quiet)
 443                         GIT_QUIET=1
 444                         ;;
 445                 --)
 446                         shift
 447                         break
 448                         ;;
 449                 -*)
 450                         usage
 451                         ;;
 452                 *)
 453                         break
 454                         ;;
 455                 esac
 456                 shift
 457         done
 458
 459         module_list "$@" |
 460         while read mode sha1 stage sm_path
 461         do
 462                 die_if_unmatched "$mode"
 463                 name=$(module_name "$sm_path") || exit
 464
 465                 # Copy url setting when it is not set yet
 466                 if test -z "$(git config "submodule.$name.url")"
 467                 then
 468                         url=$(git config -f .gitmodules submodule."$name".url)
 469                         test -z "$url" &&
 470                         die "$(eval_gettext "No url found for submodule path '\$sm_path' in .gitmodules")"
 471
 472                         # Possibly a url relative to parent
 473                         case "$url" in
 474                         ./*|../*)
 475                                 url=$(resolve_relative_url "$url") || exit
 476                                 ;;
 477                         esac
 478                         git config submodule."$name".url "$url" ||
 479                         die "$(eval_gettext "Failed to register url for submodule path '\$sm_path'")"
 480
 481                         say "$(eval_gettext "Submodule '\$name' (\$url) registered for path '\$sm_path'")"
 482                 fi
 483
 484                 # Copy "update" setting when it is not set yet
 485                 upd="$(git config -f .gitmodules submodule."$name".update)"
 486                 test -z "$upd" ||
 487                 test -n "$(git config submodule."$name".update)" ||
 488                 git config submodule."$name".update "$upd" ||
 489                 die "$(eval_gettext "Failed to register update mode for submodule path '\$sm_path'")"
 490         done
 491 }
 492
 493 #
 494 # Update each submodule path to correct revision, using clone and checkout as needed
 495 #
 496 # $@ = requested paths (default to all)
 497 #
 498 cmd_update()
 499 {
 500         # parse $args after "submodule ... update".
 501         orig_flags=
 502         while test $# -ne 0
 503         do
 504                 case "$1" in
 505                 -q|--quiet)
 506                         GIT_QUIET=1
 507                         ;;
 508                 -i|--init)
 509                         init=1
 510                         ;;
 511                 -N|--no-fetch)
 512                         nofetch=1
 513                         ;;
 514                 -f|--force)
 515                         force=$1
 516                         ;;
 517                 -r|--rebase)
 518                         update="rebase"
 519                         ;;
 520                 --reference)
 521                         case "$2" in '') usage ;; esac
 522                         reference="--reference=$2"
 523                         orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 524                         shift
 525                         ;;
 526                 --reference=*)
 527                         reference="$1"
 528                         ;;
 529                 -m|--merge)
 530                         update="merge"
 531                         ;;
 532                 --recursive)
 533                         recursive=1
 534                         ;;
 535                 --checkout)
 536                         update="checkout"
 537                         ;;
 538                 --)
 539                         shift
 540                         break
 541                         ;;
 542                 -*)
 543                         usage
 544                         ;;
 545                 *)
 546                         break
 547                         ;;
 548                 esac
 549                 orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 550                 shift
 551         done
 552
 553         if test -n "$init"
 554         then
 555                 cmd_init "--" "$@" || return
 556         fi
 557
 558         cloned_modules=
 559         module_list "$@" | {
 560         err=
 561         while read mode sha1 stage sm_path
 562         do
 563                 die_if_unmatched "$mode"
 564                 if test "$stage" = U
 565                 then
 566                         echo >&2 "Skipping unmerged submodule $sm_path"
 567                         continue
 568                 fi
 569                 name=$(module_name "$sm_path") || exit
 570                 url=$(git config submodule."$name".url)
 571                 if ! test -z "$update"
 572                 then
 573                         update_module=$update
 574                 else
 575                         update_module=$(git config submodule."$name".update)
 576                 fi
 577
 578                 if test "$update_module" = "none"
 579                 then
 580                         echo "Skipping submodule '$sm_path'"
 581                         continue
 582                 fi
 583
 584                 if test -z "$url"
 585                 then
 586                         # Only mention uninitialized submodules when its
 587                         # path have been specified
 588                         test "$#" != "0" &&
 589                         say "$(eval_gettext "Submodule path '\$sm_path' not initialized
 590 Maybe you want to use 'update --init'?")"
 591                         continue
 592                 fi
 593
 594                 if ! test -d "$sm_path"/.git -o -f "$sm_path"/.git
 595                 then
 596                         module_clone "$sm_path" "$url" "$reference"|| exit
 597                         cloned_modules="$cloned_modules;$name"
 598                         subsha1=
 599                 else
 600                         subsha1=$(clear_local_git_env; cd "$sm_path" &&
 601                                 git rev-parse --verify HEAD) ||
 602                         die "$(eval_gettext "Unable to find current revision in submodule path '\$sm_path'")"
 603                 fi
 604
 605                 if test "$subsha1" != "$sha1" -o -n "$force"
 606                 then
 607                         subforce=$force
 608                         # If we don't already have a -f flag and the submodule has never been checked out
 609                         if test -z "$subsha1" -a -z "$force"
 610                         then
 611                                 subforce="-f"
 612                         fi
 613
 614                         if test -z "$nofetch"
 615                         then
 616                                 # Run fetch only if $sha1 isn't present or it
 617                                 # is not reachable from a ref.
 618                                 (clear_local_git_env; cd "$sm_path" &&
 619                                         ( (rev=$(git rev-list -n 1 $sha1 --not --all 2>/dev/null) &&
 620                                          test -z "$rev") || git-fetch)) ||
 621                                 die "$(eval_gettext "Unable to fetch in submodule path '\$sm_path'")"
 622                         fi
 623
 624                         # Is this something we just cloned?
 625                         case ";$cloned_modules;" in
 626                         *";$name;"*)
 627                                 # then there is no local change to integrate
 628                                 update_module= ;;
 629                         esac
 630
 631                         must_die_on_failure=
 632                         case "$update_module" in
 633                         rebase)
 634                                 command="git rebase"
 635                                 die_msg="$(eval_gettext "Unable to rebase '\$sha1' in submodule path '\$sm_path'")"
 636                                 say_msg="$(eval_gettext "Submodule path '\$sm_path': rebased into '\$sha1'")"
 637                                 must_die_on_failure=yes
 638                                 ;;
 639                         merge)
 640                                 command="git merge"
 641                                 die_msg="$(eval_gettext "Unable to merge '\$sha1' in submodule path '\$sm_path'")"
 642                                 say_msg="$(eval_gettext "Submodule path '\$sm_path': merged in '\$sha1'")"
 643                                 must_die_on_failure=yes
 644                                 ;;
 645                         *)
 646                                 command="git checkout $subforce -q"
 647                                 die_msg="$(eval_gettext "Unable to checkout '\$sha1' in submodule path '\$sm_path'")"
 648                                 say_msg="$(eval_gettext "Submodule path '\$sm_path': checked out '\$sha1'")"
 649                                 ;;
 650                         esac
 651
 652                         if (clear_local_git_env; cd "$sm_path" && $command "$sha1")
 653                         then
 654                                 say "$say_msg"
 655                         elif test -n "$must_die_on_failure"
 656                         then
 657                                 die_with_status 2 "$die_msg"
 658                         else
 659                                 err="${err};$die_msg"
 660                                 continue
 661                         fi
 662                 fi
 663
 664                 if test -n "$recursive"
 665                 then
 666                         (clear_local_git_env; cd "$sm_path" && eval cmd_update "$orig_flags")
 667                         res=$?
 668                         if test $res -gt 0
 669                         then
 670                                 die_msg="$(eval_gettext "Failed to recurse into submodule path '\$sm_path'")"
 671                                 if test $res -eq 1
 672                                 then
 673                                         err="${err};$die_msg"
 674                                         continue
 675                                 else
 676                                         die_with_status $res "$die_msg"
 677                                 fi
 678                         fi
 679                 fi
 680         done
 681
 682         if test -n "$err"
 683         then
 684                 OIFS=$IFS
 685                 IFS=';'
 686                 for e in $err
 687                 do
 688                         if test -n "$e"
 689                         then
 690                                 echo >&2 "$e"
 691                         fi
 692                 done
 693                 IFS=$OIFS
 694                 exit 1
 695         fi
 696         }
 697 }
 698
 699 set_name_rev () {
 700         revname=$( (
 701                 clear_local_git_env
 702                 cd "$1" && {
 703                         git describe "$2" 2>/dev/null ||
 704                         git describe --tags "$2" 2>/dev/null ||
 705                         git describe --contains "$2" 2>/dev/null ||
 706                         git describe --all --always "$2"
 707                 }
 708         ) )
 709         test -z "$revname" || revname=" ($revname)"
 710 }
 711 #
 712 # Show commit summary for submodules in index or working tree
 713 #
 714 # If '--cached' is given, show summary between index and given commit,
 715 # or between working tree and given commit
 716 #
 717 # $@ = [commit (default 'HEAD'),] requested paths (default all)
 718 #
 719 cmd_summary() {
 720         summary_limit=-1
 721         for_status=
 722         diff_cmd=diff-index
 723
 724         # parse $args after "submodule ... summary".
 725         while test $# -ne 0
 726         do
 727                 case "$1" in
 728                 --cached)
 729                         cached="$1"
 730                         ;;
 731                 --files)
 732                         files="$1"
 733                         ;;
 734                 --for-status)
 735                         for_status="$1"
 736                         ;;
 737                 -n|--summary-limit)
 738                         if summary_limit=$(($2 + 0)) 2>/dev/null && test "$summary_limit" = "$2"
 739                         then
 740                                 :
 741                         else
 742                                 usage
 743                         fi
 744                         shift
 745                         ;;
 746                 --)
 747                         shift
 748                         break
 749                         ;;
 750                 -*)
 751                         usage
 752                         ;;
 753                 *)
 754                         break
 755                         ;;
 756                 esac
 757                 shift
 758         done
 759
 760         test $summary_limit = 0 && return
 761
 762         if rev=$(git rev-parse -q --verify --default HEAD ${1+"$1"})
 763         then
 764                 head=$rev
 765                 test $# = 0 || shift
 766         elif test -z "$1" -o "$1" = "HEAD"
 767         then
 768                 # before the first commit: compare with an empty tree
 769                 head=$(git hash-object -w -t tree --stdin </dev/null)
 770                 test -z "$1" || shift
 771         else
 772                 head="HEAD"
 773         fi
 774
 775         if [ -n "$files" ]
 776         then
 777                 test -n "$cached" &&
 778                 die "$(gettext "The --cached option cannot be used with the --files option")"
 779                 diff_cmd=diff-files
 780                 head=
 781         fi
 782
 783         cd_to_toplevel
 784         # Get modified modules cared by user
 785         modules=$(git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- "$@" |
 786                 sane_egrep '^:([0-7]* )?160000' |
 787                 while read mod_src mod_dst sha1_src sha1_dst status name
 788                 do
 789                         # Always show modules deleted or type-changed (blob<->module)
 790                         test $status = D -o $status = T && echo "$name" && continue
 791                         # Also show added or modified modules which are checked out
 792                         GIT_DIR="$name/.git" git-rev-parse --git-dir >/dev/null 2>&1 &&
 793                         echo "$name"
 794                 done
 795         )
 796
 797         test -z "$modules" && return
 798
 799         git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- $modules |
 800         sane_egrep '^:([0-7]* )?160000' |
 801         cut -c2- |
 802         while read mod_src mod_dst sha1_src sha1_dst status name
 803         do
 804                 if test -z "$cached" &&
 805                         test $sha1_dst = 0000000000000000000000000000000000000000
 806                 then
 807                         case "$mod_dst" in
 808                         160000)
 809                                 sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
 810                                 ;;
 811                         100644 | 100755 | 120000)
 812                                 sha1_dst=$(git hash-object $name)
 813                                 ;;
 814                         000000)
 815                                 ;; # removed
 816                         *)
 817                                 # unexpected type
 818                                 eval_gettextln "unexpected mode \$mod_dst" >&2
 819                                 continue ;;
 820                         esac
 821                 fi
 822                 missing_src=
 823                 missing_dst=
 824
 825                 test $mod_src = 160000 &&
 826                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_src^0 >/dev/null &&
 827                 missing_src=t
 828
 829                 test $mod_dst = 160000 &&
 830                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_dst^0 >/dev/null &&
 831                 missing_dst=t
 832
 833                 total_commits=
 834                 case "$missing_src,$missing_dst" in
 835                 t,)
 836                         errmsg="$(eval_gettext "  Warn: \$name doesn't contain commit \$sha1_src")"
 837                         ;;
 838                 ,t)
 839                         errmsg="$(eval_gettext "  Warn: \$name doesn't contain commit \$sha1_dst")"
 840                         ;;
 841                 t,t)
 842                         errmsg="$(eval_gettext "  Warn: \$name doesn't contain commits \$sha1_src and \$sha1_dst")"
 843                         ;;
 844                 *)
 845                         errmsg=
 846                         total_commits=$(
 847                         if test $mod_src = 160000 -a $mod_dst = 160000
 848                         then
 849                                 range="$sha1_src...$sha1_dst"
 850                         elif test $mod_src = 160000
 851                         then
 852                                 range=$sha1_src
 853                         else
 854                                 range=$sha1_dst
 855                         fi
 856                         GIT_DIR="$name/.git" \
 857                         git rev-list --first-parent $range -- | wc -l
 858                         )
 859                         total_commits=" ($(($total_commits + 0)))"
 860                         ;;
 861                 esac
 862
 863                 sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
 864                 sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
 865                 if test $status = T
 866                 then
 867                         blob="$(gettext "blob")"
 868                         submodule="$(gettext "submodule")"
 869                         if test $mod_dst = 160000
 870                         then
 871                                 echo "* $name $sha1_abbr_src($blob)->$sha1_abbr_dst($submodule)$total_commits:"
 872                         else
 873                                 echo "* $name $sha1_abbr_src($submodule)->$sha1_abbr_dst($blob)$total_commits:"
 874                         fi
 875                 else
 876                         echo "* $name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
 877                 fi
 878                 if test -n "$errmsg"
 879                 then
 880                         # Don't give error msg for modification whose dst is not submodule
 881                         # i.e. deleted or changed to blob
 882                         test $mod_dst = 160000 && echo "$errmsg"
 883                 else
 884                         if test $mod_src = 160000 -a $mod_dst = 160000
 885                         then
 886                                 limit=
 887                                 test $summary_limit -gt 0 && limit="-$summary_limit"
 888                                 GIT_DIR="$name/.git" \
 889                                 git log $limit --pretty='format:  %m %s' \
 890                                 --first-parent $sha1_src...$sha1_dst
 891                         elif test $mod_dst = 160000
 892                         then
 893                                 GIT_DIR="$name/.git" \
 894                                 git log --pretty='format:  > %s' -1 $sha1_dst
 895                         else
 896                                 GIT_DIR="$name/.git" \
 897                                 git log --pretty='format:  < %s' -1 $sha1_src
 898                         fi
 899                         echo
 900                 fi
 901                 echo
 902         done |
 903         if test -n "$for_status"; then
 904                 if [ -n "$files" ]; then
 905                         status_msg="$(gettextln "# Submodules changed but not updated:")"
 906                 else
 907                         status_msg="$(gettextln "# Submodule changes to be committed:")"
 908                 fi
 909                 status_sed=$(sed -e 's|^|# |' -e 's|^# $|#|')
 910                 cat <<EOF
 911 $status_msg
 912 #
 913 $status_sed
 914 EOF
 915         else
 916                 cat
 917         fi
 918 }
 919 #
 920 # List all submodules, prefixed with:
 921 #  - submodule not initialized
 922 #  + different revision checked out
 923 #
 924 # If --cached was specified the revision in the index will be printed
 925 # instead of the currently checked out revision.
 926 #
 927 # $@ = requested paths (default to all)
 928 #
 929 cmd_status()
 930 {
 931         # parse $args after "submodule ... status".
 932         orig_flags=
 933         while test $# -ne 0
 934         do
 935                 case "$1" in
 936                 -q|--quiet)
 937                         GIT_QUIET=1
 938                         ;;
 939                 --cached)
 940                         cached=1
 941                         ;;
 942                 --recursive)
 943                         recursive=1
 944                         ;;
 945                 --)
 946                         shift
 947                         break
 948                         ;;
 949                 -*)
 950                         usage
 951                         ;;
 952                 *)
 953                         break
 954                         ;;
 955                 esac
 956                 orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 957                 shift
 958         done
 959
 960         module_list "$@" |
 961         while read mode sha1 stage sm_path
 962         do
 963                 die_if_unmatched "$mode"
 964                 name=$(module_name "$sm_path") || exit
 965                 url=$(git config submodule."$name".url)
 966                 displaypath="$prefix$sm_path"
 967                 if test "$stage" = U
 968                 then
 969                         say "U$sha1 $displaypath"
 970                         continue
 971                 fi
 972                 if test -z "$url" || ! test -d "$sm_path"/.git -o -f "$sm_path"/.git
 973                 then
 974                         say "-$sha1 $displaypath"
 975                         continue;
 976                 fi
 977                 set_name_rev "$sm_path" "$sha1"
 978                 if git diff-files --ignore-submodules=dirty --quiet -- "$sm_path"
 979                 then
 980                         say " $sha1 $displaypath$revname"
 981                 else
 982                         if test -z "$cached"
 983                         then
 984                                 sha1=$(clear_local_git_env; cd "$sm_path" && git rev-parse --verify HEAD)
 985                                 set_name_rev "$sm_path" "$sha1"
 986                         fi
 987                         say "+$sha1 $displaypath$revname"
 988                 fi
 989
 990                 if test -n "$recursive"
 991                 then
 992                         (
 993                                 prefix="$displaypath/"
 994                                 clear_local_git_env
 995                                 cd "$sm_path" &&
 996                                 eval cmd_status "$orig_args"
 997                         ) ||
 998                         die "$(eval_gettext "Failed to recurse into submodule path '\$sm_path'")"
 999                 fi
1000         done
1001 }
1002 #
1003 # Sync remote urls for submodules
1004 # This makes the value for remote.$remote.url match the value
1005 # specified in .gitmodules.
1006 #
1007 cmd_sync()
1008 {
1009         while test $# -ne 0
1010         do
1011                 case "$1" in
1012                 -q|--quiet)
1013                         GIT_QUIET=1
1014                         shift
1015                         ;;
1016                 --)
1017                         shift
1018                         break
1019                         ;;
1020                 -*)
1021                         usage
1022                         ;;
1023                 *)
1024                         break
1025                         ;;
1026                 esac
1027         done
1028         cd_to_toplevel
1029         module_list "$@" |
1030         while read mode sha1 stage sm_path
1031         do
1032                 die_if_unmatched "$mode"
1033                 name=$(module_name "$sm_path")
1034                 url=$(git config -f .gitmodules --get submodule."$name".url)
1035
1036                 # Possibly a url relative to parent
1037                 case "$url" in
1038                 ./*|../*)
1039                         # rewrite foo/bar as ../.. to find path from
1040                         # submodule work tree to superproject work tree
1041                         up_path="$(echo "$sm_path" | sed "s/[^/][^/]*/../g")" &&
1042                         # guarantee a trailing /
1043                         up_path=${up_path%/}/ &&
1044                         # path from submodule work tree to submodule origin repo
1045                         sub_origin_url=$(resolve_relative_url "$url" "$up_path") &&
1046                         # path from superproject work tree to submodule origin repo
1047                         super_config_url=$(resolve_relative_url "$url") || exit
1048                         ;;
1049                 *)
1050                         sub_origin_url="$url"
1051                         super_config_url="$url"
1052                         ;;
1053                 esac
1054
1055                 if git config "submodule.$name.url" >/dev/null 2>/dev/null
1056                 then
1057                         say "$(eval_gettext "Synchronizing submodule url for '\$name'")"
1058                         git config submodule."$name".url "$super_config_url"
1059
1060                         if test -e "$sm_path"/.git
1061                         then
1062                         (
1063                                 clear_local_git_env
1064                                 cd "$sm_path"
1065                                 remote=$(get_default_remote)
1066                                 git config remote."$remote".url "$sub_origin_url"
1067                         )
1068                         fi
1069                 fi
1070         done
1071 }
1072
1073 # This loop parses the command line arguments to find the
1074 # subcommand name to dispatch.  Parsing of the subcommand specific
1075 # options are primarily done by the subcommand implementations.
1076 # Subcommand specific options such as --branch and --cached are
1077 # parsed here as well, for backward compatibility.
1078
1079 while test $# != 0 && test -z "$command"
1080 do
1081         case "$1" in
1082         add | foreach | init | update | status | summary | sync)
1083                 command=$1
1084                 ;;
1085         -q|--quiet)
1086                 GIT_QUIET=1
1087                 ;;
1088         -b|--branch)
1089                 case "$2" in
1090                 '')
1091                         usage
1092                         ;;
1093                 esac
1094                 branch="$2"; shift
1095                 ;;
1096         --cached)
1097                 cached="$1"
1098                 ;;
1099         --)
1100                 break
1101                 ;;
1102         -*)
1103                 usage
1104                 ;;
1105         *)
1106                 break
1107                 ;;
1108         esac
1109         shift
1110 done
1111
1112 # No command word defaults to "status"
1113 if test -z "$command"
1114 then
1115     if test $# = 0
1116     then
1117         command=status
1118     else
1119         usage
1120     fi
1121 fi
1122
1123 # "-b branch" is accepted only by "add"
1124 if test -n "$branch" && test "$command" != add
1125 then
1126         usage
1127 fi
1128
1129 # "--cached" is accepted only by "status" and "summary"
1130 if test -n "$cached" && test "$command" != status -a "$command" != summary
1131 then
1132         usage
1133 fi
1134
1135 "cmd_$command" "$@"