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] [--name <name>] [--reference <repository>] [--] <repository> [<path>]
   9    or: $dashless [--quiet] status [--cached] [--recursive] [--] [<path>...]
  10    or: $dashless [--quiet] init [--] [<path>...]
  11    or: $dashless [--quiet] deinit [-f|--force] [--] <path>...
  12    or: $dashless [--quiet] update [--init] [--remote] [-N|--no-fetch] [-f|--force] [--rebase] [--reference <repository>] [--merge] [--recursive] [--] [<path>...]
  13    or: $dashless [--quiet] summary [--cached|--files] [--summary-limit <n>] [commit] [--] [<path>...]
  14    or: $dashless [--quiet] foreach [--recursive] <command>
  15    or: $dashless [--quiet] sync [--recursive] [--] [<path>...]"
  16 OPTIONS_SPEC=
  17 SUBDIRECTORY_OK=Yes
  18 . git-sh-setup
  19 . git-sh-i18n
  20 . git-parse-remote
  21 require_work_tree
  22 wt_prefix=$(git rev-parse --show-prefix)
  23 cd_to_toplevel
  24
  25 command=
  26 branch=
  27 force=
  28 reference=
  29 cached=
  30 recursive=
  31 init=
  32 files=
  33 remote=
  34 nofetch=
  35 update=
  36 prefix=
  37 custom_name=
  38 depth=
  39
  40 # The function takes at most 2 arguments. The first argument is the
  41 # URL that navigates to the submodule origin repo. When relative, this URL
  42 # is relative to the superproject origin URL repo. The second up_path
  43 # argument, if specified, is the relative path that navigates
  44 # from the submodule working tree to the superproject working tree.
  45 #
  46 # The output of the function is the origin URL of the submodule.
  47 #
  48 # The output will either be an absolute URL or filesystem path (if the
  49 # superproject origin URL is an absolute URL or filesystem path,
  50 # respectively) or a relative file system path (if the superproject
  51 # origin URL is a relative file system path).
  52 #
  53 # When the output is a relative file system path, the path is either
  54 # relative to the submodule working tree, if up_path is specified, or to
  55 # the superproject working tree otherwise.
  56 resolve_relative_url ()
  57 {
  58         remote=$(get_default_remote)
  59         remoteurl=$(git config "remote.$remote.url") ||
  60                 remoteurl=$(pwd) # the repository is its own authoritative upstream
  61         url="$1"
  62         remoteurl=${remoteurl%/}
  63         sep=/
  64         up_path="$2"
  65
  66         case "$remoteurl" in
  67         *:*|/*)
  68                 is_relative=
  69                 ;;
  70         ./*|../*)
  71                 is_relative=t
  72                 ;;
  73         *)
  74                 is_relative=t
  75                 remoteurl="./$remoteurl"
  76                 ;;
  77         esac
  78
  79         while test -n "$url"
  80         do
  81                 case "$url" in
  82                 ../*)
  83                         url="${url#../}"
  84                         case "$remoteurl" in
  85                         */*)
  86                                 remoteurl="${remoteurl%/*}"
  87                                 ;;
  88                         *:*)
  89                                 remoteurl="${remoteurl%:*}"
  90                                 sep=:
  91                                 ;;
  92                         *)
  93                                 if test -z "$is_relative" || test "." = "$remoteurl"
  94                                 then
  95                                         die "$(eval_gettext "cannot strip one component off url '\$remoteurl'")"
  96                                 else
  97                                         remoteurl=.
  98                                 fi
  99                                 ;;
 100                         esac
 101                         ;;
 102                 ./*)
 103                         url="${url#./}"
 104                         ;;
 105                 *)
 106                         break;;
 107                 esac
 108         done
 109         remoteurl="$remoteurl$sep${url%/}"
 110         echo "${is_relative:+${up_path}}${remoteurl#./}"
 111 }
 112
 113 # Resolve a path to be relative to another path.  This is intended for
 114 # converting submodule paths when git-submodule is run in a subdirectory
 115 # and only handles paths where the directory separator is '/'.
 116 #
 117 # The output is the first argument as a path relative to the second argument,
 118 # which defaults to $wt_prefix if it is omitted.
 119 relative_path ()
 120 {
 121         local target curdir result
 122         target=$1
 123         curdir=${2-$wt_prefix}
 124         curdir=${curdir%/}
 125         result=
 126
 127         while test -n "$curdir"
 128         do
 129                 case "$target" in
 130                 "$curdir/"*)
 131                         target=${target#"$curdir"/}
 132                         break
 133                         ;;
 134                 esac
 135
 136                 result="${result}../"
 137                 if test "$curdir" = "${curdir%/*}"
 138                 then
 139                         curdir=
 140                 else
 141                         curdir="${curdir%/*}"
 142                 fi
 143         done
 144
 145         echo "$result$target"
 146 }
 147
 148 #
 149 # Get submodule info for registered submodules
 150 # $@ = path to limit submodule list
 151 #
 152 module_list()
 153 {
 154         eval "set $(git rev-parse --sq --prefix "$wt_prefix" -- "$@")"
 155         (
 156                 git ls-files -z --error-unmatch --stage -- "$@" ||
 157                 echo "unmatched pathspec exists"
 158         ) |
 159         perl -e '
 160         my %unmerged = ();
 161         my ($null_sha1) = ("0" x 40);
 162         my @out = ();
 163         my $unmatched = 0;
 164         $/ = "\0";
 165         while (<STDIN>) {
 166                 if (/^unmatched pathspec/) {
 167                         $unmatched = 1;
 168                         next;
 169                 }
 170                 chomp;
 171                 my ($mode, $sha1, $stage, $path) =
 172                         /^([0-7]+) ([0-9a-f]{40}) ([0-3])\t(.*)$/;
 173                 next unless $mode eq "160000";
 174                 if ($stage ne "0") {
 175                         if (!$unmerged{$path}++) {
 176                                 push @out, "$mode $null_sha1 U\t$path\n";
 177                         }
 178                         next;
 179                 }
 180                 push @out, "$_\n";
 181         }
 182         if ($unmatched) {
 183                 print "#unmatched\n";
 184         } else {
 185                 print for (@out);
 186         }
 187         '
 188 }
 189
 190 die_if_unmatched ()
 191 {
 192         if test "$1" = "#unmatched"
 193         then
 194                 exit 1
 195         fi
 196 }
 197
 198 #
 199 # Print a submodule configuration setting
 200 #
 201 # $1 = submodule name
 202 # $2 = option name
 203 # $3 = default value
 204 #
 205 # Checks in the usual git-config places first (for overrides),
 206 # otherwise it falls back on .gitmodules.  This allows you to
 207 # distribute project-wide defaults in .gitmodules, while still
 208 # customizing individual repositories if necessary.  If the option is
 209 # not in .gitmodules either, print a default value.
 210 #
 211 get_submodule_config () {
 212         name="$1"
 213         option="$2"
 214         default="$3"
 215         value=$(git config submodule."$name"."$option")
 216         if test -z "$value"
 217         then
 218                 value=$(git config -f .gitmodules submodule."$name"."$option")
 219         fi
 220         printf '%s' "${value:-$default}"
 221 }
 222
 223
 224 #
 225 # Map submodule path to submodule name
 226 #
 227 # $1 = path
 228 #
 229 module_name()
 230 {
 231         # Do we have "submodule.<something>.path = $1" defined in .gitmodules file?
 232         sm_path="$1"
 233         re=$(printf '%s\n' "$1" | sed -e 's/[].[^$\\*]/\\&/g')
 234         name=$( git config -f .gitmodules --get-regexp '^submodule\..*\.path$' |
 235                 sed -n -e 's|^submodule\.\(.*\)\.path '"$re"'$|\1|p' )
 236         test -z "$name" &&
 237         die "$(eval_gettext "No submodule mapping found in .gitmodules for path '\$sm_path'")"
 238         echo "$name"
 239 }
 240
 241 #
 242 # Clone a submodule
 243 #
 244 # Prior to calling, cmd_update checks that a possibly existing
 245 # path is not a git repository.
 246 # Likewise, cmd_add checks that path does not exist at all,
 247 # since it is the location of a new submodule.
 248 #
 249 module_clone()
 250 {
 251         sm_path=$1
 252         name=$2
 253         url=$3
 254         reference="$4"
 255         depth="$5"
 256         quiet=
 257         if test -n "$GIT_QUIET"
 258         then
 259                 quiet=-q
 260         fi
 261
 262         gitdir=
 263         gitdir_base=
 264         base_name=$(dirname "$name")
 265
 266         gitdir=$(git rev-parse --git-dir)
 267         gitdir_base="$gitdir/modules/$base_name"
 268         gitdir="$gitdir/modules/$name"
 269
 270         if test -d "$gitdir"
 271         then
 272                 mkdir -p "$sm_path"
 273                 rm -f "$gitdir/index"
 274         else
 275                 mkdir -p "$gitdir_base"
 276                 (
 277                         clear_local_git_env
 278                         git clone $quiet ${depth:+"$depth"} -n ${reference:+"$reference"} \
 279                                 --separate-git-dir "$gitdir" "$url" "$sm_path"
 280                 ) ||
 281                 die "$(eval_gettext "Clone of '\$url' into submodule path '\$sm_path' failed")"
 282         fi
 283
 284         # We already are at the root of the work tree but cd_to_toplevel will
 285         # resolve any symlinks that might be present in $PWD
 286         a=$(cd_to_toplevel && cd "$gitdir" && pwd)/
 287         b=$(cd_to_toplevel && cd "$sm_path" && pwd)/
 288         # normalize Windows-style absolute paths to POSIX-style absolute paths
 289         case $a in [a-zA-Z]:/*) a=/${a%%:*}${a#*:} ;; esac
 290         case $b in [a-zA-Z]:/*) b=/${b%%:*}${b#*:} ;; esac
 291         # Remove all common leading directories after a sanity check
 292         if test "${a#$b}" != "$a" || test "${b#$a}" != "$b"; then
 293                 die "$(eval_gettext "Gitdir '\$a' is part of the submodule path '\$b' or vice versa")"
 294         fi
 295         while test "${a%%/*}" = "${b%%/*}"
 296         do
 297                 a=${a#*/}
 298                 b=${b#*/}
 299         done
 300         # Now chop off the trailing '/'s that were added in the beginning
 301         a=${a%/}
 302         b=${b%/}
 303
 304         # Turn each leading "*/" component into "../"
 305         rel=$(echo $b | sed -e 's|[^/][^/]*|..|g')
 306         echo "gitdir: $rel/$a" >"$sm_path/.git"
 307
 308         rel=$(echo $a | sed -e 's|[^/][^/]*|..|g')
 309         (clear_local_git_env; cd "$sm_path" && GIT_WORK_TREE=. git config core.worktree "$rel/$b")
 310 }
 311
 312 isnumber()
 313 {
 314         n=$(($1 + 0)) 2>/dev/null && test "$n" = "$1"
 315 }
 316
 317 #
 318 # Add a new submodule to the working tree, .gitmodules and the index
 319 #
 320 # $@ = repo path
 321 #
 322 # optional branch is stored in global branch variable
 323 #
 324 cmd_add()
 325 {
 326         # parse $args after "submodule ... add".
 327         reference_path=
 328         while test $# -ne 0
 329         do
 330                 case "$1" in
 331                 -b | --branch)
 332                         case "$2" in '') usage ;; esac
 333                         branch=$2
 334                         shift
 335                         ;;
 336                 -f | --force)
 337                         force=$1
 338                         ;;
 339                 -q|--quiet)
 340                         GIT_QUIET=1
 341                         ;;
 342                 --reference)
 343                         case "$2" in '') usage ;; esac
 344                         reference_path=$2
 345                         shift
 346                         ;;
 347                 --reference=*)
 348                         reference_path="${1#--reference=}"
 349                         ;;
 350                 --name)
 351                         case "$2" in '') usage ;; esac
 352                         custom_name=$2
 353                         shift
 354                         ;;
 355                 --depth)
 356                         case "$2" in '') usage ;; esac
 357                         depth="--depth=$2"
 358                         shift
 359                         ;;
 360                 --depth=*)
 361                         depth=$1
 362                         ;;
 363                 --)
 364                         shift
 365                         break
 366                         ;;
 367                 -*)
 368                         usage
 369                         ;;
 370                 *)
 371                         break
 372                         ;;
 373                 esac
 374                 shift
 375         done
 376
 377         if test -n "$reference_path"
 378         then
 379                 is_absolute_path "$reference_path" ||
 380                 reference_path="$wt_prefix$reference_path"
 381
 382                 reference="--reference=$reference_path"
 383         fi
 384
 385         repo=$1
 386         sm_path=$2
 387
 388         if test -z "$sm_path"; then
 389                 sm_path=$(echo "$repo" |
 390                         sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
 391         fi
 392
 393         if test -z "$repo" -o -z "$sm_path"; then
 394                 usage
 395         fi
 396
 397         is_absolute_path "$sm_path" || sm_path="$wt_prefix$sm_path"
 398
 399         # assure repo is absolute or relative to parent
 400         case "$repo" in
 401         ./*|../*)
 402                 test -z "$wt_prefix" ||
 403                 die "$(gettext "Relative path can only be used from the toplevel of the working tree")"
 404
 405                 # dereference source url relative to parent's url
 406                 realrepo=$(resolve_relative_url "$repo") || exit
 407                 ;;
 408         *:*|/*)
 409                 # absolute url
 410                 realrepo=$repo
 411                 ;;
 412         *)
 413                 die "$(eval_gettext "repo URL: '\$repo' must be absolute or begin with ./|../")"
 414         ;;
 415         esac
 416
 417         # normalize path:
 418         # multiple //; leading ./; /./; /../; trailing /
 419         sm_path=$(printf '%s/\n' "$sm_path" |
 420                 sed -e '
 421                         s|//*|/|g
 422                         s|^\(\./\)*||
 423                         s|/\./|/|g
 424                         :start
 425                         s|\([^/]*\)/\.\./||
 426                         tstart
 427                         s|/*$||
 428                 ')
 429         git ls-files --error-unmatch "$sm_path" > /dev/null 2>&1 &&
 430         die "$(eval_gettext "'\$sm_path' already exists in the index")"
 431
 432         if test -z "$force" && ! git add --dry-run --ignore-missing "$sm_path" > /dev/null 2>&1
 433         then
 434                 eval_gettextln "The following path is ignored by one of your .gitignore files:
 435 \$sm_path
 436 Use -f if you really want to add it." >&2
 437                 exit 1
 438         fi
 439
 440         if test -n "$custom_name"
 441         then
 442                 sm_name="$custom_name"
 443         else
 444                 sm_name="$sm_path"
 445         fi
 446
 447         # perhaps the path exists and is already a git repo, else clone it
 448         if test -e "$sm_path"
 449         then
 450                 if test -d "$sm_path"/.git -o -f "$sm_path"/.git
 451                 then
 452                         eval_gettextln "Adding existing repo at '\$sm_path' to the index"
 453                 else
 454                         die "$(eval_gettext "'\$sm_path' already exists and is not a valid git repo")"
 455                 fi
 456
 457         else
 458                 if test -d ".git/modules/$sm_name"
 459                 then
 460                         if test -z "$force"
 461                         then
 462                                 echo >&2 "$(eval_gettext "A git directory for '\$sm_name' is found locally with remote(s):")"
 463                                 GIT_DIR=".git/modules/$sm_name" GIT_WORK_TREE=. git remote -v | grep '(fetch)' | sed -e s,^,"  ", -e s,' (fetch)',, >&2
 464                                 echo >&2 "$(eval_gettext "If you want to reuse this local git directory instead of cloning again from")"
 465                                 echo >&2 "  $realrepo"
 466                                 echo >&2 "$(eval_gettext "use the '--force' option. If the local git directory is not the correct repo")"
 467                                 die "$(eval_gettext "or you are unsure what this means choose another name with the '--name' option.")"
 468                         else
 469                                 echo "$(eval_gettext "Reactivating local git directory for submodule '\$sm_name'.")"
 470                         fi
 471                 fi
 472                 module_clone "$sm_path" "$sm_name" "$realrepo" "$reference" "$depth" || exit
 473                 (
 474                         clear_local_git_env
 475                         cd "$sm_path" &&
 476                         # ash fails to wordsplit ${branch:+-b "$branch"...}
 477                         case "$branch" in
 478                         '') git checkout -f -q ;;
 479                         ?*) git checkout -f -q -B "$branch" "origin/$branch" ;;
 480                         esac
 481                 ) || die "$(eval_gettext "Unable to checkout submodule '\$sm_path'")"
 482         fi
 483         git config submodule."$sm_name".url "$realrepo"
 484
 485         git add $force "$sm_path" ||
 486         die "$(eval_gettext "Failed to add submodule '\$sm_path'")"
 487
 488         git config -f .gitmodules submodule."$sm_name".path "$sm_path" &&
 489         git config -f .gitmodules submodule."$sm_name".url "$repo" &&
 490         if test -n "$branch"
 491         then
 492                 git config -f .gitmodules submodule."$sm_name".branch "$branch"
 493         fi &&
 494         git add --force .gitmodules ||
 495         die "$(eval_gettext "Failed to register submodule '\$sm_path'")"
 496 }
 497
 498 #
 499 # Execute an arbitrary command sequence in each checked out
 500 # submodule
 501 #
 502 # $@ = command to execute
 503 #
 504 cmd_foreach()
 505 {
 506         # parse $args after "submodule ... foreach".
 507         while test $# -ne 0
 508         do
 509                 case "$1" in
 510                 -q|--quiet)
 511                         GIT_QUIET=1
 512                         ;;
 513                 --recursive)
 514                         recursive=1
 515                         ;;
 516                 -*)
 517                         usage
 518                         ;;
 519                 *)
 520                         break
 521                         ;;
 522                 esac
 523                 shift
 524         done
 525
 526         toplevel=$(pwd)
 527
 528         # dup stdin so that it can be restored when running the external
 529         # command in the subshell (and a recursive call to this function)
 530         exec 3<&0
 531
 532         module_list |
 533         while read mode sha1 stage sm_path
 534         do
 535                 die_if_unmatched "$mode"
 536                 if test -e "$sm_path"/.git
 537                 then
 538                         displaypath=$(relative_path "$sm_path")
 539                         say "$(eval_gettext "Entering '\$prefix\$displaypath'")"
 540                         name=$(module_name "$sm_path")
 541                         (
 542                                 prefix="$prefix$sm_path/"
 543                                 clear_local_git_env
 544                                 cd "$sm_path" &&
 545                                 sm_path=$(relative_path "$sm_path") &&
 546                                 # we make $path available to scripts ...
 547                                 path=$sm_path &&
 548                                 eval "$@" &&
 549                                 if test -n "$recursive"
 550                                 then
 551                                         cmd_foreach "--recursive" "$@"
 552                                 fi
 553                         ) <&3 3<&- ||
 554                         die "$(eval_gettext "Stopping at '\$prefix\$displaypath'; script returned non-zero status.")"
 555                 fi
 556         done
 557 }
 558
 559 #
 560 # Register submodules in .git/config
 561 #
 562 # $@ = requested paths (default to all)
 563 #
 564 cmd_init()
 565 {
 566         # parse $args after "submodule ... init".
 567         while test $# -ne 0
 568         do
 569                 case "$1" in
 570                 -q|--quiet)
 571                         GIT_QUIET=1
 572                         ;;
 573                 --)
 574                         shift
 575                         break
 576                         ;;
 577                 -*)
 578                         usage
 579                         ;;
 580                 *)
 581                         break
 582                         ;;
 583                 esac
 584                 shift
 585         done
 586
 587         module_list "$@" |
 588         while read mode sha1 stage sm_path
 589         do
 590                 die_if_unmatched "$mode"
 591                 name=$(module_name "$sm_path") || exit
 592
 593                 displaypath=$(relative_path "$sm_path")
 594
 595                 # Copy url setting when it is not set yet
 596                 if test -z "$(git config "submodule.$name.url")"
 597                 then
 598                         url=$(git config -f .gitmodules submodule."$name".url)
 599                         test -z "$url" &&
 600                         die "$(eval_gettext "No url found for submodule path '\$displaypath' in .gitmodules")"
 601
 602                         # Possibly a url relative to parent
 603                         case "$url" in
 604                         ./*|../*)
 605                                 url=$(resolve_relative_url "$url") || exit
 606                                 ;;
 607                         esac
 608                         git config submodule."$name".url "$url" ||
 609                         die "$(eval_gettext "Failed to register url for submodule path '\$displaypath'")"
 610
 611                         say "$(eval_gettext "Submodule '\$name' (\$url) registered for path '\$displaypath'")"
 612                 fi
 613
 614                 # Copy "update" setting when it is not set yet
 615                 upd="$(git config -f .gitmodules submodule."$name".update)"
 616                 test -z "$upd" ||
 617                 test -n "$(git config submodule."$name".update)" ||
 618                 git config submodule."$name".update "$upd" ||
 619                 die "$(eval_gettext "Failed to register update mode for submodule path '\$displaypath'")"
 620         done
 621 }
 622
 623 #
 624 # Unregister submodules from .git/config and remove their work tree
 625 #
 626 # $@ = requested paths (use '.' to deinit all submodules)
 627 #
 628 cmd_deinit()
 629 {
 630         # parse $args after "submodule ... deinit".
 631         while test $# -ne 0
 632         do
 633                 case "$1" in
 634                 -f|--force)
 635                         force=$1
 636                         ;;
 637                 -q|--quiet)
 638                         GIT_QUIET=1
 639                         ;;
 640                 --)
 641                         shift
 642                         break
 643                         ;;
 644                 -*)
 645                         usage
 646                         ;;
 647                 *)
 648                         break
 649                         ;;
 650                 esac
 651                 shift
 652         done
 653
 654         if test $# = 0
 655         then
 656                 die "$(eval_gettext "Use '.' if you really want to deinitialize all submodules")"
 657         fi
 658
 659         module_list "$@" |
 660         while read mode sha1 stage sm_path
 661         do
 662                 die_if_unmatched "$mode"
 663                 name=$(module_name "$sm_path") || exit
 664
 665                 displaypath=$(relative_path "$sm_path")
 666
 667                 # Remove the submodule work tree (unless the user already did it)
 668                 if test -d "$sm_path"
 669                 then
 670                         # Protect submodules containing a .git directory
 671                         if test -d "$sm_path/.git"
 672                         then
 673                                 echo >&2 "$(eval_gettext "Submodule work tree '\$displaypath' contains a .git directory")"
 674                                 die "$(eval_gettext "(use 'rm -rf' if you really want to remove it including all of its history)")"
 675                         fi
 676
 677                         if test -z "$force"
 678                         then
 679                                 git rm -qn "$sm_path" ||
 680                                 die "$(eval_gettext "Submodule work tree '\$displaypath' contains local modifications; use '-f' to discard them")"
 681                         fi
 682                         rm -rf "$sm_path" &&
 683                         say "$(eval_gettext "Cleared directory '\$displaypath'")" ||
 684                         say "$(eval_gettext "Could not remove submodule work tree '\$displaypath'")"
 685                 fi
 686
 687                 mkdir "$sm_path" || say "$(eval_gettext "Could not create empty submodule directory '\$displaypath'")"
 688
 689                 # Remove the .git/config entries (unless the user already did it)
 690                 if test -n "$(git config --get-regexp submodule."$name\.")"
 691                 then
 692                         # Remove the whole section so we have a clean state when
 693                         # the user later decides to init this submodule again
 694                         url=$(git config submodule."$name".url)
 695                         git config --remove-section submodule."$name" 2>/dev/null &&
 696                         say "$(eval_gettext "Submodule '\$name' (\$url) unregistered for path '\$displaypath'")"
 697                 fi
 698         done
 699 }
 700
 701 #
 702 # Update each submodule path to correct revision, using clone and checkout as needed
 703 #
 704 # $@ = requested paths (default to all)
 705 #
 706 cmd_update()
 707 {
 708         # parse $args after "submodule ... update".
 709         orig_flags=
 710         while test $# -ne 0
 711         do
 712                 case "$1" in
 713                 -q|--quiet)
 714                         GIT_QUIET=1
 715                         ;;
 716                 -i|--init)
 717                         init=1
 718                         ;;
 719                 --remote)
 720                         remote=1
 721                         ;;
 722                 -N|--no-fetch)
 723                         nofetch=1
 724                         ;;
 725                 -f|--force)
 726                         force=$1
 727                         ;;
 728                 -r|--rebase)
 729                         update="rebase"
 730                         ;;
 731                 --reference)
 732                         case "$2" in '') usage ;; esac
 733                         reference="--reference=$2"
 734                         orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 735                         shift
 736                         ;;
 737                 --reference=*)
 738                         reference="$1"
 739                         ;;
 740                 -m|--merge)
 741                         update="merge"
 742                         ;;
 743                 --recursive)
 744                         recursive=1
 745                         ;;
 746                 --checkout)
 747                         update="checkout"
 748                         ;;
 749                 --depth)
 750                         case "$2" in '') usage ;; esac
 751                         depth="--depth=$2"
 752                         shift
 753                         ;;
 754                 --depth=*)
 755                         depth=$1
 756                         ;;
 757                 --)
 758                         shift
 759                         break
 760                         ;;
 761                 -*)
 762                         usage
 763                         ;;
 764                 *)
 765                         break
 766                         ;;
 767                 esac
 768                 orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 769                 shift
 770         done
 771
 772         if test -n "$init"
 773         then
 774                 cmd_init "--" "$@" || return
 775         fi
 776
 777         cloned_modules=
 778         module_list "$@" | {
 779         err=
 780         while read mode sha1 stage sm_path
 781         do
 782                 die_if_unmatched "$mode"
 783                 if test "$stage" = U
 784                 then
 785                         echo >&2 "Skipping unmerged submodule $prefix$sm_path"
 786                         continue
 787                 fi
 788                 name=$(module_name "$sm_path") || exit
 789                 url=$(git config submodule."$name".url)
 790                 branch=$(get_submodule_config "$name" branch master)
 791                 if ! test -z "$update"
 792                 then
 793                         update_module=$update
 794                 else
 795                         update_module=$(git config submodule."$name".update)
 796                 fi
 797
 798                 displaypath=$(relative_path "$prefix$sm_path")
 799
 800                 if test "$update_module" = "none"
 801                 then
 802                         echo "Skipping submodule '$displaypath'"
 803                         continue
 804                 fi
 805
 806                 if test -z "$url"
 807                 then
 808                         # Only mention uninitialized submodules when its
 809                         # path have been specified
 810                         test "$#" != "0" &&
 811                         say "$(eval_gettext "Submodule path '\$displaypath' not initialized
 812 Maybe you want to use 'update --init'?")"
 813                         continue
 814                 fi
 815
 816                 if ! test -d "$sm_path"/.git -o -f "$sm_path"/.git
 817                 then
 818                         module_clone "$sm_path" "$name" "$url" "$reference" "$depth" || exit
 819                         cloned_modules="$cloned_modules;$name"
 820                         subsha1=
 821                 else
 822                         subsha1=$(clear_local_git_env; cd "$sm_path" &&
 823                                 git rev-parse --verify HEAD) ||
 824                         die "$(eval_gettext "Unable to find current revision in submodule path '\$displaypath'")"
 825                 fi
 826
 827                 if test -n "$remote"
 828                 then
 829                         if test -z "$nofetch"
 830                         then
 831                                 # Fetch remote before determining tracking $sha1
 832                                 (clear_local_git_env; cd "$sm_path" && git-fetch) ||
 833                                 die "$(eval_gettext "Unable to fetch in submodule path '\$sm_path'")"
 834                         fi
 835                         remote_name=$(clear_local_git_env; cd "$sm_path" && get_default_remote)
 836                         sha1=$(clear_local_git_env; cd "$sm_path" &&
 837                                 git rev-parse --verify "${remote_name}/${branch}") ||
 838                         die "$(eval_gettext "Unable to find current ${remote_name}/${branch} revision in submodule path '\$sm_path'")"
 839                 fi
 840
 841                 if test "$subsha1" != "$sha1" -o -n "$force"
 842                 then
 843                         subforce=$force
 844                         # If we don't already have a -f flag and the submodule has never been checked out
 845                         if test -z "$subsha1" -a -z "$force"
 846                         then
 847                                 subforce="-f"
 848                         fi
 849
 850                         if test -z "$nofetch"
 851                         then
 852                                 # Run fetch only if $sha1 isn't present or it
 853                                 # is not reachable from a ref.
 854                                 (clear_local_git_env; cd "$sm_path" &&
 855                                         ( (rev=$(git rev-list -n 1 $sha1 --not --all 2>/dev/null) &&
 856                                          test -z "$rev") || git-fetch)) ||
 857                                 die "$(eval_gettext "Unable to fetch in submodule path '\$displaypath'")"
 858                         fi
 859
 860                         # Is this something we just cloned?
 861                         case ";$cloned_modules;" in
 862                         *";$name;"*)
 863                                 # then there is no local change to integrate
 864                                 update_module= ;;
 865                         esac
 866
 867                         must_die_on_failure=
 868                         case "$update_module" in
 869                         rebase)
 870                                 command="git rebase"
 871                                 die_msg="$(eval_gettext "Unable to rebase '\$sha1' in submodule path '\$displaypath'")"
 872                                 say_msg="$(eval_gettext "Submodule path '\$displaypath': rebased into '\$sha1'")"
 873                                 must_die_on_failure=yes
 874                                 ;;
 875                         merge)
 876                                 command="git merge"
 877                                 die_msg="$(eval_gettext "Unable to merge '\$sha1' in submodule path '\$displaypath'")"
 878                                 say_msg="$(eval_gettext "Submodule path '\$displaypath': merged in '\$sha1'")"
 879                                 must_die_on_failure=yes
 880                                 ;;
 881                         !*)
 882                                 command="${update_module#!}"
 883                                 die_msg="$(eval_gettext "Execution of '\$command \$sha1' failed in submodule  path '\$prefix\$sm_path'")"
 884                                 say_msg="$(eval_gettext "Submodule path '\$prefix\$sm_path': '\$command \$sha1'")"
 885                                 must_die_on_failure=yes
 886                                 ;;
 887                         *)
 888                                 command="git checkout $subforce -q"
 889                                 die_msg="$(eval_gettext "Unable to checkout '\$sha1' in submodule path '\$displaypath'")"
 890                                 say_msg="$(eval_gettext "Submodule path '\$displaypath': checked out '\$sha1'")"
 891                                 ;;
 892                         esac
 893
 894                         if (clear_local_git_env; cd "$sm_path" && $command "$sha1")
 895                         then
 896                                 say "$say_msg"
 897                         elif test -n "$must_die_on_failure"
 898                         then
 899                                 die_with_status 2 "$die_msg"
 900                         else
 901                                 err="${err};$die_msg"
 902                                 continue
 903                         fi
 904                 fi
 905
 906                 if test -n "$recursive"
 907                 then
 908                         (
 909                                 prefix="$prefix$sm_path/"
 910                                 clear_local_git_env
 911                                 cd "$sm_path" &&
 912                                 eval cmd_update "$orig_flags"
 913                         )
 914                         res=$?
 915                         if test $res -gt 0
 916                         then
 917                                 die_msg="$(eval_gettext "Failed to recurse into submodule path '\$displaypath'")"
 918                                 if test $res -eq 1
 919                                 then
 920                                         err="${err};$die_msg"
 921                                         continue
 922                                 else
 923                                         die_with_status $res "$die_msg"
 924                                 fi
 925                         fi
 926                 fi
 927         done
 928
 929         if test -n "$err"
 930         then
 931                 OIFS=$IFS
 932                 IFS=';'
 933                 for e in $err
 934                 do
 935                         if test -n "$e"
 936                         then
 937                                 echo >&2 "$e"
 938                         fi
 939                 done
 940                 IFS=$OIFS
 941                 exit 1
 942         fi
 943         }
 944 }
 945
 946 set_name_rev () {
 947         revname=$( (
 948                 clear_local_git_env
 949                 cd "$1" && {
 950                         git describe "$2" 2>/dev/null ||
 951                         git describe --tags "$2" 2>/dev/null ||
 952                         git describe --contains "$2" 2>/dev/null ||
 953                         git describe --all --always "$2"
 954                 }
 955         ) )
 956         test -z "$revname" || revname=" ($revname)"
 957 }
 958 #
 959 # Show commit summary for submodules in index or working tree
 960 #
 961 # If '--cached' is given, show summary between index and given commit,
 962 # or between working tree and given commit
 963 #
 964 # $@ = [commit (default 'HEAD'),] requested paths (default all)
 965 #
 966 cmd_summary() {
 967         summary_limit=-1
 968         for_status=
 969         diff_cmd=diff-index
 970
 971         # parse $args after "submodule ... summary".
 972         while test $# -ne 0
 973         do
 974                 case "$1" in
 975                 --cached)
 976                         cached="$1"
 977                         ;;
 978                 --files)
 979                         files="$1"
 980                         ;;
 981                 --for-status)
 982                         for_status="$1"
 983                         ;;
 984                 -n|--summary-limit)
 985                         summary_limit="$2"
 986                         isnumber "$summary_limit" || usage
 987                         shift
 988                         ;;
 989                 --summary-limit=*)
 990                         summary_limit="${1#--summary-limit=}"
 991                         isnumber "$summary_limit" || usage
 992                         ;;
 993                 --)
 994                         shift
 995                         break
 996                         ;;
 997                 -*)
 998                         usage
 999                         ;;
1000                 *)
1001                         break
1002                         ;;
1003                 esac
1004                 shift
1005         done
1006
1007         test $summary_limit = 0 && return
1008
1009         if rev=$(git rev-parse -q --verify --default HEAD ${1+"$1"})
1010         then
1011                 head=$rev
1012                 test $# = 0 || shift
1013         elif test -z "$1" -o "$1" = "HEAD"
1014         then
1015                 # before the first commit: compare with an empty tree
1016                 head=$(git hash-object -w -t tree --stdin </dev/null)
1017                 test -z "$1" || shift
1018         else
1019                 head="HEAD"
1020         fi
1021
1022         if [ -n "$files" ]
1023         then
1024                 test -n "$cached" &&
1025                 die "$(gettext "The --cached option cannot be used with the --files option")"
1026                 diff_cmd=diff-files
1027                 head=
1028         fi
1029
1030         cd_to_toplevel
1031         eval "set $(git rev-parse --sq --prefix "$wt_prefix" -- "$@")"
1032         # Get modified modules cared by user
1033         modules=$(git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- "$@" |
1034                 sane_egrep '^:([0-7]* )?160000' |
1035                 while read mod_src mod_dst sha1_src sha1_dst status name
1036                 do
1037                         # Always show modules deleted or type-changed (blob<->module)
1038                         test $status = D -o $status = T && echo "$name" && continue
1039                         # Also show added or modified modules which are checked out
1040                         GIT_DIR="$name/.git" git-rev-parse --git-dir >/dev/null 2>&1 &&
1041                         echo "$name"
1042                 done
1043         )
1044
1045         test -z "$modules" && return
1046
1047         git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- $modules |
1048         sane_egrep '^:([0-7]* )?160000' |
1049         cut -c2- |
1050         while read mod_src mod_dst sha1_src sha1_dst status name
1051         do
1052                 if test -z "$cached" &&
1053                         test $sha1_dst = 0000000000000000000000000000000000000000
1054                 then
1055                         case "$mod_dst" in
1056                         160000)
1057                                 sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
1058                                 ;;
1059                         100644 | 100755 | 120000)
1060                                 sha1_dst=$(git hash-object $name)
1061                                 ;;
1062                         000000)
1063                                 ;; # removed
1064                         *)
1065                                 # unexpected type
1066                                 eval_gettextln "unexpected mode \$mod_dst" >&2
1067                                 continue ;;
1068                         esac
1069                 fi
1070                 missing_src=
1071                 missing_dst=
1072
1073                 test $mod_src = 160000 &&
1074                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_src^0 >/dev/null &&
1075                 missing_src=t
1076
1077                 test $mod_dst = 160000 &&
1078                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_dst^0 >/dev/null &&
1079                 missing_dst=t
1080
1081                 display_name=$(relative_path "$name")
1082
1083                 total_commits=
1084                 case "$missing_src,$missing_dst" in
1085                 t,)
1086                         errmsg="$(eval_gettext "  Warn: \$display_name doesn't contain commit \$sha1_src")"
1087                         ;;
1088                 ,t)
1089                         errmsg="$(eval_gettext "  Warn: \$display_name doesn't contain commit \$sha1_dst")"
1090                         ;;
1091                 t,t)
1092                         errmsg="$(eval_gettext "  Warn: \$display_name doesn't contain commits \$sha1_src and \$sha1_dst")"
1093                         ;;
1094                 *)
1095                         errmsg=
1096                         total_commits=$(
1097                         if test $mod_src = 160000 -a $mod_dst = 160000
1098                         then
1099                                 range="$sha1_src...$sha1_dst"
1100                         elif test $mod_src = 160000
1101                         then
1102                                 range=$sha1_src
1103                         else
1104                                 range=$sha1_dst
1105                         fi
1106                         GIT_DIR="$name/.git" \
1107                         git rev-list --first-parent $range -- | wc -l
1108                         )
1109                         total_commits=" ($(($total_commits + 0)))"
1110                         ;;
1111                 esac
1112
1113                 sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
1114                 sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
1115                 if test $status = T
1116                 then
1117                         blob="$(gettext "blob")"
1118                         submodule="$(gettext "submodule")"
1119                         if test $mod_dst = 160000
1120                         then
1121                                 echo "* $display_name $sha1_abbr_src($blob)->$sha1_abbr_dst($submodule)$total_commits:"
1122                         else
1123                                 echo "* $display_name $sha1_abbr_src($submodule)->$sha1_abbr_dst($blob)$total_commits:"
1124                         fi
1125                 else
1126                         echo "* $display_name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
1127                 fi
1128                 if test -n "$errmsg"
1129                 then
1130                         # Don't give error msg for modification whose dst is not submodule
1131                         # i.e. deleted or changed to blob
1132                         test $mod_dst = 160000 && echo "$errmsg"
1133                 else
1134                         if test $mod_src = 160000 -a $mod_dst = 160000
1135                         then
1136                                 limit=
1137                                 test $summary_limit -gt 0 && limit="-$summary_limit"
1138                                 GIT_DIR="$name/.git" \
1139                                 git log $limit --pretty='format:  %m %s' \
1140                                 --first-parent $sha1_src...$sha1_dst
1141                         elif test $mod_dst = 160000
1142                         then
1143                                 GIT_DIR="$name/.git" \
1144                                 git log --pretty='format:  > %s' -1 $sha1_dst
1145                         else
1146                                 GIT_DIR="$name/.git" \
1147                                 git log --pretty='format:  < %s' -1 $sha1_src
1148                         fi
1149                         echo
1150                 fi
1151                 echo
1152         done |
1153         if test -n "$for_status"; then
1154                 if [ -n "$files" ]; then
1155                         gettextln "Submodules changed but not updated:" | git stripspace -c
1156                 else
1157                         gettextln "Submodule changes to be committed:" | git stripspace -c
1158                 fi
1159                 printf "\n" | git stripspace -c
1160                 git stripspace -c
1161         else
1162                 cat
1163         fi
1164 }
1165 #
1166 # List all submodules, prefixed with:
1167 #  - submodule not initialized
1168 #  + different revision checked out
1169 #
1170 # If --cached was specified the revision in the index will be printed
1171 # instead of the currently checked out revision.
1172 #
1173 # $@ = requested paths (default to all)
1174 #
1175 cmd_status()
1176 {
1177         # parse $args after "submodule ... status".
1178         while test $# -ne 0
1179         do
1180                 case "$1" in
1181                 -q|--quiet)
1182                         GIT_QUIET=1
1183                         ;;
1184                 --cached)
1185                         cached=1
1186                         ;;
1187                 --recursive)
1188                         recursive=1
1189                         ;;
1190                 --)
1191                         shift
1192                         break
1193                         ;;
1194                 -*)
1195                         usage
1196                         ;;
1197                 *)
1198                         break
1199                         ;;
1200                 esac
1201                 shift
1202         done
1203
1204         module_list "$@" |
1205         while read mode sha1 stage sm_path
1206         do
1207                 die_if_unmatched "$mode"
1208                 name=$(module_name "$sm_path") || exit
1209                 url=$(git config submodule."$name".url)
1210                 displaypath=$(relative_path "$prefix$sm_path")
1211                 if test "$stage" = U
1212                 then
1213                         say "U$sha1 $displaypath"
1214                         continue
1215                 fi
1216                 if test -z "$url" || ! test -d "$sm_path"/.git -o -f "$sm_path"/.git
1217                 then
1218                         say "-$sha1 $displaypath"
1219                         continue;
1220                 fi
1221                 if git diff-files --ignore-submodules=dirty --quiet -- "$sm_path"
1222                 then
1223                         set_name_rev "$sm_path" "$sha1"
1224                         say " $sha1 $displaypath$revname"
1225                 else
1226                         if test -z "$cached"
1227                         then
1228                                 sha1=$(clear_local_git_env; cd "$sm_path" && git rev-parse --verify HEAD)
1229                         fi
1230                         set_name_rev "$sm_path" "$sha1"
1231                         say "+$sha1 $displaypath$revname"
1232                 fi
1233
1234                 if test -n "$recursive"
1235                 then
1236                         (
1237                                 prefix="$displaypath/"
1238                                 clear_local_git_env
1239                                 cd "$sm_path" &&
1240                                 eval cmd_status
1241                         ) ||
1242                         die "$(eval_gettext "Failed to recurse into submodule path '\$sm_path'")"
1243                 fi
1244         done
1245 }
1246 #
1247 # Sync remote urls for submodules
1248 # This makes the value for remote.$remote.url match the value
1249 # specified in .gitmodules.
1250 #
1251 cmd_sync()
1252 {
1253         while test $# -ne 0
1254         do
1255                 case "$1" in
1256                 -q|--quiet)
1257                         GIT_QUIET=1
1258                         shift
1259                         ;;
1260                 --recursive)
1261                         recursive=1
1262                         shift
1263                         ;;
1264                 --)
1265                         shift
1266                         break
1267                         ;;
1268                 -*)
1269                         usage
1270                         ;;
1271                 *)
1272                         break
1273                         ;;
1274                 esac
1275         done
1276         cd_to_toplevel
1277         module_list "$@" |
1278         while read mode sha1 stage sm_path
1279         do
1280                 die_if_unmatched "$mode"
1281                 name=$(module_name "$sm_path")
1282                 url=$(git config -f .gitmodules --get submodule."$name".url)
1283
1284                 # Possibly a url relative to parent
1285                 case "$url" in
1286                 ./*|../*)
1287                         # rewrite foo/bar as ../.. to find path from
1288                         # submodule work tree to superproject work tree
1289                         up_path="$(echo "$sm_path" | sed "s/[^/][^/]*/../g")" &&
1290                         # guarantee a trailing /
1291                         up_path=${up_path%/}/ &&
1292                         # path from submodule work tree to submodule origin repo
1293                         sub_origin_url=$(resolve_relative_url "$url" "$up_path") &&
1294                         # path from superproject work tree to submodule origin repo
1295                         super_config_url=$(resolve_relative_url "$url") || exit
1296                         ;;
1297                 *)
1298                         sub_origin_url="$url"
1299                         super_config_url="$url"
1300                         ;;
1301                 esac
1302
1303                 if git config "submodule.$name.url" >/dev/null 2>/dev/null
1304                 then
1305                         displaypath=$(relative_path "$prefix$sm_path")
1306                         say "$(eval_gettext "Synchronizing submodule url for '\$displaypath'")"
1307                         git config submodule."$name".url "$super_config_url"
1308
1309                         if test -e "$sm_path"/.git
1310                         then
1311                         (
1312                                 clear_local_git_env
1313                                 cd "$sm_path"
1314                                 remote=$(get_default_remote)
1315                                 git config remote."$remote".url "$sub_origin_url"
1316
1317                                 if test -n "$recursive"
1318                                 then
1319                                         prefix="$prefix$sm_path/"
1320                                         eval cmd_sync
1321                                 fi
1322                         )
1323                         fi
1324                 fi
1325         done
1326 }
1327
1328 # This loop parses the command line arguments to find the
1329 # subcommand name to dispatch.  Parsing of the subcommand specific
1330 # options are primarily done by the subcommand implementations.
1331 # Subcommand specific options such as --branch and --cached are
1332 # parsed here as well, for backward compatibility.
1333
1334 while test $# != 0 && test -z "$command"
1335 do
1336         case "$1" in
1337         add | foreach | init | deinit | update | status | summary | sync)
1338                 command=$1
1339                 ;;
1340         -q|--quiet)
1341                 GIT_QUIET=1
1342                 ;;
1343         -b|--branch)
1344                 case "$2" in
1345                 '')
1346                         usage
1347                         ;;
1348                 esac
1349                 branch="$2"; shift
1350                 ;;
1351         --cached)
1352                 cached="$1"
1353                 ;;
1354         --)
1355                 break
1356                 ;;
1357         -*)
1358                 usage
1359                 ;;
1360         *)
1361                 break
1362                 ;;
1363         esac
1364         shift
1365 done
1366
1367 # No command word defaults to "status"
1368 if test -z "$command"
1369 then
1370     if test $# = 0
1371     then
1372         command=status
1373     else
1374         usage
1375     fi
1376 fi
1377
1378 # "-b branch" is accepted only by "add"
1379 if test -n "$branch" && test "$command" != add
1380 then
1381         usage
1382 fi
1383
1384 # "--cached" is accepted only by "status" and "summary"
1385 if test -n "$cached" && test "$command" != status -a "$command" != summary
1386 then
1387         usage
1388 fi
1389
1390 "cmd_$command" "$@"