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