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                                 if test $# -eq 1
 548                                 then
 549                                         eval "$1"
 550                                 else
 551                                         "$@"
 552                                 fi &&
 553                                 if test -n "$recursive"
 554                                 then
 555                                         cmd_foreach "--recursive" "$@"
 556                                 fi
 557                         ) <&3 3<&- ||
 558                         die "$(eval_gettext "Stopping at '\$prefix\$displaypath'; script returned non-zero status.")"
 559                 fi
 560         done
 561 }
 562
 563 #
 564 # Register submodules in .git/config
 565 #
 566 # $@ = requested paths (default to all)
 567 #
 568 cmd_init()
 569 {
 570         # parse $args after "submodule ... init".
 571         while test $# -ne 0
 572         do
 573                 case "$1" in
 574                 -q|--quiet)
 575                         GIT_QUIET=1
 576                         ;;
 577                 --)
 578                         shift
 579                         break
 580                         ;;
 581                 -*)
 582                         usage
 583                         ;;
 584                 *)
 585                         break
 586                         ;;
 587                 esac
 588                 shift
 589         done
 590
 591         module_list "$@" |
 592         while read mode sha1 stage sm_path
 593         do
 594                 die_if_unmatched "$mode"
 595                 name=$(module_name "$sm_path") || exit
 596
 597                 displaypath=$(relative_path "$sm_path")
 598
 599                 # Copy url setting when it is not set yet
 600                 if test -z "$(git config "submodule.$name.url")"
 601                 then
 602                         url=$(git config -f .gitmodules submodule."$name".url)
 603                         test -z "$url" &&
 604                         die "$(eval_gettext "No url found for submodule path '\$displaypath' in .gitmodules")"
 605
 606                         # Possibly a url relative to parent
 607                         case "$url" in
 608                         ./*|../*)
 609                                 url=$(resolve_relative_url "$url") || exit
 610                                 ;;
 611                         esac
 612                         git config submodule."$name".url "$url" ||
 613                         die "$(eval_gettext "Failed to register url for submodule path '\$displaypath'")"
 614
 615                         say "$(eval_gettext "Submodule '\$name' (\$url) registered for path '\$displaypath'")"
 616                 fi
 617
 618                 # Copy "update" setting when it is not set yet
 619                 if upd="$(git config -f .gitmodules submodule."$name".update)" &&
 620                    test -n "$upd" &&
 621                    test -z "$(git config submodule."$name".update)"
 622                 then
 623                         case "$upd" in
 624                         checkout | rebase | merge | none)
 625                                 ;; # known modes of updating
 626                         *)
 627                                 echo >&2 "warning: unknown update mode '$upd' suggested for submodule '$name'"
 628                                 upd=none
 629                                 ;;
 630                         esac
 631                         git config submodule."$name".update "$upd" ||
 632                         die "$(eval_gettext "Failed to register update mode for submodule path '\$displaypath'")"
 633                 fi
 634         done
 635 }
 636
 637 #
 638 # Unregister submodules from .git/config and remove their work tree
 639 #
 640 # $@ = requested paths (use '.' to deinit all submodules)
 641 #
 642 cmd_deinit()
 643 {
 644         # parse $args after "submodule ... deinit".
 645         while test $# -ne 0
 646         do
 647                 case "$1" in
 648                 -f|--force)
 649                         force=$1
 650                         ;;
 651                 -q|--quiet)
 652                         GIT_QUIET=1
 653                         ;;
 654                 --)
 655                         shift
 656                         break
 657                         ;;
 658                 -*)
 659                         usage
 660                         ;;
 661                 *)
 662                         break
 663                         ;;
 664                 esac
 665                 shift
 666         done
 667
 668         if test $# = 0
 669         then
 670                 die "$(eval_gettext "Use '.' if you really want to deinitialize all submodules")"
 671         fi
 672
 673         module_list "$@" |
 674         while read mode sha1 stage sm_path
 675         do
 676                 die_if_unmatched "$mode"
 677                 name=$(module_name "$sm_path") || exit
 678
 679                 displaypath=$(relative_path "$sm_path")
 680
 681                 # Remove the submodule work tree (unless the user already did it)
 682                 if test -d "$sm_path"
 683                 then
 684                         # Protect submodules containing a .git directory
 685                         if test -d "$sm_path/.git"
 686                         then
 687                                 echo >&2 "$(eval_gettext "Submodule work tree '\$displaypath' contains a .git directory")"
 688                                 die "$(eval_gettext "(use 'rm -rf' if you really want to remove it including all of its history)")"
 689                         fi
 690
 691                         if test -z "$force"
 692                         then
 693                                 git rm -qn "$sm_path" ||
 694                                 die "$(eval_gettext "Submodule work tree '\$displaypath' contains local modifications; use '-f' to discard them")"
 695                         fi
 696                         rm -rf "$sm_path" &&
 697                         say "$(eval_gettext "Cleared directory '\$displaypath'")" ||
 698                         say "$(eval_gettext "Could not remove submodule work tree '\$displaypath'")"
 699                 fi
 700
 701                 mkdir "$sm_path" || say "$(eval_gettext "Could not create empty submodule directory '\$displaypath'")"
 702
 703                 # Remove the .git/config entries (unless the user already did it)
 704                 if test -n "$(git config --get-regexp submodule."$name\.")"
 705                 then
 706                         # Remove the whole section so we have a clean state when
 707                         # the user later decides to init this submodule again
 708                         url=$(git config submodule."$name".url)
 709                         git config --remove-section submodule."$name" 2>/dev/null &&
 710                         say "$(eval_gettext "Submodule '\$name' (\$url) unregistered for path '\$displaypath'")"
 711                 fi
 712         done
 713 }
 714
 715 #
 716 # Update each submodule path to correct revision, using clone and checkout as needed
 717 #
 718 # $@ = requested paths (default to all)
 719 #
 720 cmd_update()
 721 {
 722         # parse $args after "submodule ... update".
 723         while test $# -ne 0
 724         do
 725                 case "$1" in
 726                 -q|--quiet)
 727                         GIT_QUIET=1
 728                         ;;
 729                 -i|--init)
 730                         init=1
 731                         ;;
 732                 --remote)
 733                         remote=1
 734                         ;;
 735                 -N|--no-fetch)
 736                         nofetch=1
 737                         ;;
 738                 -f|--force)
 739                         force=$1
 740                         ;;
 741                 -r|--rebase)
 742                         update="rebase"
 743                         ;;
 744                 --reference)
 745                         case "$2" in '') usage ;; esac
 746                         reference="--reference=$2"
 747                         shift
 748                         ;;
 749                 --reference=*)
 750                         reference="$1"
 751                         ;;
 752                 -m|--merge)
 753                         update="merge"
 754                         ;;
 755                 --recursive)
 756                         recursive=1
 757                         ;;
 758                 --checkout)
 759                         update="checkout"
 760                         ;;
 761                 --depth)
 762                         case "$2" in '') usage ;; esac
 763                         depth="--depth=$2"
 764                         shift
 765                         ;;
 766                 --depth=*)
 767                         depth=$1
 768                         ;;
 769                 --)
 770                         shift
 771                         break
 772                         ;;
 773                 -*)
 774                         usage
 775                         ;;
 776                 *)
 777                         break
 778                         ;;
 779                 esac
 780                 shift
 781         done
 782
 783         if test -n "$init"
 784         then
 785                 cmd_init "--" "$@" || return
 786         fi
 787
 788         cloned_modules=
 789         module_list "$@" | {
 790         err=
 791         while read mode sha1 stage sm_path
 792         do
 793                 die_if_unmatched "$mode"
 794                 if test "$stage" = U
 795                 then
 796                         echo >&2 "Skipping unmerged submodule $prefix$sm_path"
 797                         continue
 798                 fi
 799                 name=$(module_name "$sm_path") || exit
 800                 url=$(git config submodule."$name".url)
 801                 branch=$(get_submodule_config "$name" branch master)
 802                 if ! test -z "$update"
 803                 then
 804                         update_module=$update
 805                 else
 806                         update_module=$(git config submodule."$name".update)
 807                         case "$update_module" in
 808                         '')
 809                                 ;; # Unset update mode
 810                         checkout | rebase | merge | none)
 811                                 ;; # Known update modes
 812                         !*)
 813                                 ;; # Custom update command
 814                         *)
 815                                 die "$(eval_gettext "Invalid update mode '$update_module' for submodule '$name'")"
 816                                 ;;
 817                         esac
 818                 fi
 819
 820                 displaypath=$(relative_path "$prefix$sm_path")
 821
 822                 if test "$update_module" = "none"
 823                 then
 824                         echo "Skipping submodule '$displaypath'"
 825                         continue
 826                 fi
 827
 828                 if test -z "$url"
 829                 then
 830                         # Only mention uninitialized submodules when its
 831                         # path have been specified
 832                         test "$#" != "0" &&
 833                         say "$(eval_gettext "Submodule path '\$displaypath' not initialized
 834 Maybe you want to use 'update --init'?")"
 835                         continue
 836                 fi
 837
 838                 if ! test -d "$sm_path"/.git -o -f "$sm_path"/.git
 839                 then
 840                         module_clone "$sm_path" "$name" "$url" "$reference" "$depth" || exit
 841                         cloned_modules="$cloned_modules;$name"
 842                         subsha1=
 843                 else
 844                         subsha1=$(clear_local_git_env; cd "$sm_path" &&
 845                                 git rev-parse --verify HEAD) ||
 846                         die "$(eval_gettext "Unable to find current revision in submodule path '\$displaypath'")"
 847                 fi
 848
 849                 if test -n "$remote"
 850                 then
 851                         if test -z "$nofetch"
 852                         then
 853                                 # Fetch remote before determining tracking $sha1
 854                                 (clear_local_git_env; cd "$sm_path" && git-fetch) ||
 855                                 die "$(eval_gettext "Unable to fetch in submodule path '\$sm_path'")"
 856                         fi
 857                         remote_name=$(clear_local_git_env; cd "$sm_path" && get_default_remote)
 858                         sha1=$(clear_local_git_env; cd "$sm_path" &&
 859                                 git rev-parse --verify "${remote_name}/${branch}") ||
 860                         die "$(eval_gettext "Unable to find current ${remote_name}/${branch} revision in submodule path '\$sm_path'")"
 861                 fi
 862
 863                 if test "$subsha1" != "$sha1" -o -n "$force"
 864                 then
 865                         subforce=$force
 866                         # If we don't already have a -f flag and the submodule has never been checked out
 867                         if test -z "$subsha1" -a -z "$force"
 868                         then
 869                                 subforce="-f"
 870                         fi
 871
 872                         if test -z "$nofetch"
 873                         then
 874                                 # Run fetch only if $sha1 isn't present or it
 875                                 # is not reachable from a ref.
 876                                 (clear_local_git_env; cd "$sm_path" &&
 877                                         ( (rev=$(git rev-list -n 1 $sha1 --not --all 2>/dev/null) &&
 878                                          test -z "$rev") || git-fetch)) ||
 879                                 die "$(eval_gettext "Unable to fetch in submodule path '\$displaypath'")"
 880                         fi
 881
 882                         # Is this something we just cloned?
 883                         case ";$cloned_modules;" in
 884                         *";$name;"*)
 885                                 # then there is no local change to integrate
 886                                 update_module= ;;
 887                         esac
 888
 889                         must_die_on_failure=
 890                         case "$update_module" in
 891                         rebase)
 892                                 command="git rebase"
 893                                 die_msg="$(eval_gettext "Unable to rebase '\$sha1' in submodule path '\$displaypath'")"
 894                                 say_msg="$(eval_gettext "Submodule path '\$displaypath': rebased into '\$sha1'")"
 895                                 must_die_on_failure=yes
 896                                 ;;
 897                         merge)
 898                                 command="git merge"
 899                                 die_msg="$(eval_gettext "Unable to merge '\$sha1' in submodule path '\$displaypath'")"
 900                                 say_msg="$(eval_gettext "Submodule path '\$displaypath': merged in '\$sha1'")"
 901                                 must_die_on_failure=yes
 902                                 ;;
 903                         !*)
 904                                 command="${update_module#!}"
 905                                 die_msg="$(eval_gettext "Execution of '\$command \$sha1' failed in submodule  path '\$prefix\$sm_path'")"
 906                                 say_msg="$(eval_gettext "Submodule path '\$prefix\$sm_path': '\$command \$sha1'")"
 907                                 must_die_on_failure=yes
 908                                 ;;
 909                         *)
 910                                 command="git checkout $subforce -q"
 911                                 die_msg="$(eval_gettext "Unable to checkout '\$sha1' in submodule path '\$displaypath'")"
 912                                 say_msg="$(eval_gettext "Submodule path '\$displaypath': checked out '\$sha1'")"
 913                                 ;;
 914                         esac
 915
 916                         if (clear_local_git_env; cd "$sm_path" && $command "$sha1")
 917                         then
 918                                 say "$say_msg"
 919                         elif test -n "$must_die_on_failure"
 920                         then
 921                                 die_with_status 2 "$die_msg"
 922                         else
 923                                 err="${err};$die_msg"
 924                                 continue
 925                         fi
 926                 fi
 927
 928                 if test -n "$recursive"
 929                 then
 930                         (
 931                                 prefix="$prefix$sm_path/"
 932                                 clear_local_git_env
 933                                 cd "$sm_path" &&
 934                                 eval cmd_update
 935                         )
 936                         res=$?
 937                         if test $res -gt 0
 938                         then
 939                                 die_msg="$(eval_gettext "Failed to recurse into submodule path '\$displaypath'")"
 940                                 if test $res -eq 1
 941                                 then
 942                                         err="${err};$die_msg"
 943                                         continue
 944                                 else
 945                                         die_with_status $res "$die_msg"
 946                                 fi
 947                         fi
 948                 fi
 949         done
 950
 951         if test -n "$err"
 952         then
 953                 OIFS=$IFS
 954                 IFS=';'
 955                 for e in $err
 956                 do
 957                         if test -n "$e"
 958                         then
 959                                 echo >&2 "$e"
 960                         fi
 961                 done
 962                 IFS=$OIFS
 963                 exit 1
 964         fi
 965         }
 966 }
 967
 968 set_name_rev () {
 969         revname=$( (
 970                 clear_local_git_env
 971                 cd "$1" && {
 972                         git describe "$2" 2>/dev/null ||
 973                         git describe --tags "$2" 2>/dev/null ||
 974                         git describe --contains "$2" 2>/dev/null ||
 975                         git describe --all --always "$2"
 976                 }
 977         ) )
 978         test -z "$revname" || revname=" ($revname)"
 979 }
 980 #
 981 # Show commit summary for submodules in index or working tree
 982 #
 983 # If '--cached' is given, show summary between index and given commit,
 984 # or between working tree and given commit
 985 #
 986 # $@ = [commit (default 'HEAD'),] requested paths (default all)
 987 #
 988 cmd_summary() {
 989         summary_limit=-1
 990         for_status=
 991         diff_cmd=diff-index
 992
 993         # parse $args after "submodule ... summary".
 994         while test $# -ne 0
 995         do
 996                 case "$1" in
 997                 --cached)
 998                         cached="$1"
 999                         ;;
1000                 --files)
1001                         files="$1"
1002                         ;;
1003                 --for-status)
1004                         for_status="$1"
1005                         ;;
1006                 -n|--summary-limit)
1007                         summary_limit="$2"
1008                         isnumber "$summary_limit" || usage
1009                         shift
1010                         ;;
1011                 --summary-limit=*)
1012                         summary_limit="${1#--summary-limit=}"
1013                         isnumber "$summary_limit" || usage
1014                         ;;
1015                 --)
1016                         shift
1017                         break
1018                         ;;
1019                 -*)
1020                         usage
1021                         ;;
1022                 *)
1023                         break
1024                         ;;
1025                 esac
1026                 shift
1027         done
1028
1029         test $summary_limit = 0 && return
1030
1031         if rev=$(git rev-parse -q --verify --default HEAD ${1+"$1"})
1032         then
1033                 head=$rev
1034                 test $# = 0 || shift
1035         elif test -z "$1" -o "$1" = "HEAD"
1036         then
1037                 # before the first commit: compare with an empty tree
1038                 head=$(git hash-object -w -t tree --stdin </dev/null)
1039                 test -z "$1" || shift
1040         else
1041                 head="HEAD"
1042         fi
1043
1044         if [ -n "$files" ]
1045         then
1046                 test -n "$cached" &&
1047                 die "$(gettext "The --cached option cannot be used with the --files option")"
1048                 diff_cmd=diff-files
1049                 head=
1050         fi
1051
1052         cd_to_toplevel
1053         eval "set $(git rev-parse --sq --prefix "$wt_prefix" -- "$@")"
1054         # Get modified modules cared by user
1055         modules=$(git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- "$@" |
1056                 sane_egrep '^:([0-7]* )?160000' |
1057                 while read mod_src mod_dst sha1_src sha1_dst status sm_path
1058                 do
1059                         # Always show modules deleted or type-changed (blob<->module)
1060                         test $status = D -o $status = T && echo "$sm_path" && continue
1061                         # Respect the ignore setting for --for-status.
1062                         if test -n "$for_status"
1063                         then
1064                                 name=$(module_name "$sm_path")
1065                                 ignore_config=$(get_submodule_config "$name" ignore none)
1066                                 test $status != A -a $ignore_config = all && continue
1067                         fi
1068                         # Also show added or modified modules which are checked out
1069                         GIT_DIR="$sm_path/.git" git-rev-parse --git-dir >/dev/null 2>&1 &&
1070                         echo "$sm_path"
1071                 done
1072         )
1073
1074         test -z "$modules" && return
1075
1076         git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- $modules |
1077         sane_egrep '^:([0-7]* )?160000' |
1078         cut -c2- |
1079         while read mod_src mod_dst sha1_src sha1_dst status name
1080         do
1081                 if test -z "$cached" &&
1082                         test $sha1_dst = 0000000000000000000000000000000000000000
1083                 then
1084                         case "$mod_dst" in
1085                         160000)
1086                                 sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
1087                                 ;;
1088                         100644 | 100755 | 120000)
1089                                 sha1_dst=$(git hash-object $name)
1090                                 ;;
1091                         000000)
1092                                 ;; # removed
1093                         *)
1094                                 # unexpected type
1095                                 eval_gettextln "unexpected mode \$mod_dst" >&2
1096                                 continue ;;
1097                         esac
1098                 fi
1099                 missing_src=
1100                 missing_dst=
1101
1102                 test $mod_src = 160000 &&
1103                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_src^0 >/dev/null &&
1104                 missing_src=t
1105
1106                 test $mod_dst = 160000 &&
1107                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_dst^0 >/dev/null &&
1108                 missing_dst=t
1109
1110                 display_name=$(relative_path "$name")
1111
1112                 total_commits=
1113                 case "$missing_src,$missing_dst" in
1114                 t,)
1115                         errmsg="$(eval_gettext "  Warn: \$display_name doesn't contain commit \$sha1_src")"
1116                         ;;
1117                 ,t)
1118                         errmsg="$(eval_gettext "  Warn: \$display_name doesn't contain commit \$sha1_dst")"
1119                         ;;
1120                 t,t)
1121                         errmsg="$(eval_gettext "  Warn: \$display_name doesn't contain commits \$sha1_src and \$sha1_dst")"
1122                         ;;
1123                 *)
1124                         errmsg=
1125                         total_commits=$(
1126                         if test $mod_src = 160000 -a $mod_dst = 160000
1127                         then
1128                                 range="$sha1_src...$sha1_dst"
1129                         elif test $mod_src = 160000
1130                         then
1131                                 range=$sha1_src
1132                         else
1133                                 range=$sha1_dst
1134                         fi
1135                         GIT_DIR="$name/.git" \
1136                         git rev-list --first-parent $range -- | wc -l
1137                         )
1138                         total_commits=" ($(($total_commits + 0)))"
1139                         ;;
1140                 esac
1141
1142                 sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
1143                 sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
1144                 if test $status = T
1145                 then
1146                         blob="$(gettext "blob")"
1147                         submodule="$(gettext "submodule")"
1148                         if test $mod_dst = 160000
1149                         then
1150                                 echo "* $display_name $sha1_abbr_src($blob)->$sha1_abbr_dst($submodule)$total_commits:"
1151                         else
1152                                 echo "* $display_name $sha1_abbr_src($submodule)->$sha1_abbr_dst($blob)$total_commits:"
1153                         fi
1154                 else
1155                         echo "* $display_name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
1156                 fi
1157                 if test -n "$errmsg"
1158                 then
1159                         # Don't give error msg for modification whose dst is not submodule
1160                         # i.e. deleted or changed to blob
1161                         test $mod_dst = 160000 && echo "$errmsg"
1162                 else
1163                         if test $mod_src = 160000 -a $mod_dst = 160000
1164                         then
1165                                 limit=
1166                                 test $summary_limit -gt 0 && limit="-$summary_limit"
1167                                 GIT_DIR="$name/.git" \
1168                                 git log $limit --pretty='format:  %m %s' \
1169                                 --first-parent $sha1_src...$sha1_dst
1170                         elif test $mod_dst = 160000
1171                         then
1172                                 GIT_DIR="$name/.git" \
1173                                 git log --pretty='format:  > %s' -1 $sha1_dst
1174                         else
1175                                 GIT_DIR="$name/.git" \
1176                                 git log --pretty='format:  < %s' -1 $sha1_src
1177                         fi
1178                         echo
1179                 fi
1180                 echo
1181         done
1182 }
1183 #
1184 # List all submodules, prefixed with:
1185 #  - submodule not initialized
1186 #  + different revision checked out
1187 #
1188 # If --cached was specified the revision in the index will be printed
1189 # instead of the currently checked out revision.
1190 #
1191 # $@ = requested paths (default to all)
1192 #
1193 cmd_status()
1194 {
1195         # parse $args after "submodule ... status".
1196         while test $# -ne 0
1197         do
1198                 case "$1" in
1199                 -q|--quiet)
1200                         GIT_QUIET=1
1201                         ;;
1202                 --cached)
1203                         cached=1
1204                         ;;
1205                 --recursive)
1206                         recursive=1
1207                         ;;
1208                 --)
1209                         shift
1210                         break
1211                         ;;
1212                 -*)
1213                         usage
1214                         ;;
1215                 *)
1216                         break
1217                         ;;
1218                 esac
1219                 shift
1220         done
1221
1222         module_list "$@" |
1223         while read mode sha1 stage sm_path
1224         do
1225                 die_if_unmatched "$mode"
1226                 name=$(module_name "$sm_path") || exit
1227                 url=$(git config submodule."$name".url)
1228                 displaypath=$(relative_path "$prefix$sm_path")
1229                 if test "$stage" = U
1230                 then
1231                         say "U$sha1 $displaypath"
1232                         continue
1233                 fi
1234                 if test -z "$url" || ! test -d "$sm_path"/.git -o -f "$sm_path"/.git
1235                 then
1236                         say "-$sha1 $displaypath"
1237                         continue;
1238                 fi
1239                 if git diff-files --ignore-submodules=dirty --quiet -- "$sm_path"
1240                 then
1241                         set_name_rev "$sm_path" "$sha1"
1242                         say " $sha1 $displaypath$revname"
1243                 else
1244                         if test -z "$cached"
1245                         then
1246                                 sha1=$(clear_local_git_env; cd "$sm_path" && git rev-parse --verify HEAD)
1247                         fi
1248                         set_name_rev "$sm_path" "$sha1"
1249                         say "+$sha1 $displaypath$revname"
1250                 fi
1251
1252                 if test -n "$recursive"
1253                 then
1254                         (
1255                                 prefix="$displaypath/"
1256                                 clear_local_git_env
1257                                 cd "$sm_path" &&
1258                                 eval cmd_status
1259                         ) ||
1260                         die "$(eval_gettext "Failed to recurse into submodule path '\$sm_path'")"
1261                 fi
1262         done
1263 }
1264 #
1265 # Sync remote urls for submodules
1266 # This makes the value for remote.$remote.url match the value
1267 # specified in .gitmodules.
1268 #
1269 cmd_sync()
1270 {
1271         while test $# -ne 0
1272         do
1273                 case "$1" in
1274                 -q|--quiet)
1275                         GIT_QUIET=1
1276                         shift
1277                         ;;
1278                 --recursive)
1279                         recursive=1
1280                         shift
1281                         ;;
1282                 --)
1283                         shift
1284                         break
1285                         ;;
1286                 -*)
1287                         usage
1288                         ;;
1289                 *)
1290                         break
1291                         ;;
1292                 esac
1293         done
1294         cd_to_toplevel
1295         module_list "$@" |
1296         while read mode sha1 stage sm_path
1297         do
1298                 die_if_unmatched "$mode"
1299                 name=$(module_name "$sm_path")
1300                 url=$(git config -f .gitmodules --get submodule."$name".url)
1301
1302                 # Possibly a url relative to parent
1303                 case "$url" in
1304                 ./*|../*)
1305                         # rewrite foo/bar as ../.. to find path from
1306                         # submodule work tree to superproject work tree
1307                         up_path="$(echo "$sm_path" | sed "s/[^/][^/]*/../g")" &&
1308                         # guarantee a trailing /
1309                         up_path=${up_path%/}/ &&
1310                         # path from submodule work tree to submodule origin repo
1311                         sub_origin_url=$(resolve_relative_url "$url" "$up_path") &&
1312                         # path from superproject work tree to submodule origin repo
1313                         super_config_url=$(resolve_relative_url "$url") || exit
1314                         ;;
1315                 *)
1316                         sub_origin_url="$url"
1317                         super_config_url="$url"
1318                         ;;
1319                 esac
1320
1321                 if git config "submodule.$name.url" >/dev/null 2>/dev/null
1322                 then
1323                         displaypath=$(relative_path "$prefix$sm_path")
1324                         say "$(eval_gettext "Synchronizing submodule url for '\$displaypath'")"
1325                         git config submodule."$name".url "$super_config_url"
1326
1327                         if test -e "$sm_path"/.git
1328                         then
1329                         (
1330                                 clear_local_git_env
1331                                 cd "$sm_path"
1332                                 remote=$(get_default_remote)
1333                                 git config remote."$remote".url "$sub_origin_url"
1334
1335                                 if test -n "$recursive"
1336                                 then
1337                                         prefix="$prefix$sm_path/"
1338                                         eval cmd_sync
1339                                 fi
1340                         )
1341                         fi
1342                 fi
1343         done
1344 }
1345
1346 # This loop parses the command line arguments to find the
1347 # subcommand name to dispatch.  Parsing of the subcommand specific
1348 # options are primarily done by the subcommand implementations.
1349 # Subcommand specific options such as --branch and --cached are
1350 # parsed here as well, for backward compatibility.
1351
1352 while test $# != 0 && test -z "$command"
1353 do
1354         case "$1" in
1355         add | foreach | init | deinit | update | status | summary | sync)
1356                 command=$1
1357                 ;;
1358         -q|--quiet)
1359                 GIT_QUIET=1
1360                 ;;
1361         -b|--branch)
1362                 case "$2" in
1363                 '')
1364                         usage
1365                         ;;
1366                 esac
1367                 branch="$2"; shift
1368                 ;;
1369         --cached)
1370                 cached="$1"
1371                 ;;
1372         --)
1373                 break
1374                 ;;
1375         -*)
1376                 usage
1377                 ;;
1378         *)
1379                 break
1380                 ;;
1381         esac
1382         shift
1383 done
1384
1385 # No command word defaults to "status"
1386 if test -z "$command"
1387 then
1388     if test $# = 0
1389     then
1390         command=status
1391     else
1392         usage
1393     fi
1394 fi
1395
1396 # "-b branch" is accepted only by "add"
1397 if test -n "$branch" && test "$command" != add
1398 then
1399         usage
1400 fi
1401
1402 # "--cached" is accepted only by "status" and "summary"
1403 if test -n "$cached" && test "$command" != status -a "$command" != summary
1404 then
1405         usage
1406 fi
1407
1408 "cmd_$command" "$@"