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] [--checkout|--merge|--rebase] [--reference <repository>] [--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 # $1 = submodule path
 245 # $2 = submodule name
 246 # $3 = URL to clone
 247 # $4 = reference repository to reuse (empty for independent)
 248 # $5 = depth argument for shallow clones (empty for deep)
 249 #
 250 # Prior to calling, cmd_update checks that a possibly existing
 251 # path is not a git repository.
 252 # Likewise, cmd_add checks that path does not exist at all,
 253 # since it is the location of a new submodule.
 254 #
 255 module_clone()
 256 {
 257         sm_path=$1
 258         name=$2
 259         url=$3
 260         reference="$4"
 261         depth="$5"
 262         quiet=
 263         if test -n "$GIT_QUIET"
 264         then
 265                 quiet=-q
 266         fi
 267
 268         gitdir=
 269         gitdir_base=
 270         base_name=$(dirname "$name")
 271
 272         gitdir=$(git rev-parse --git-dir)
 273         gitdir_base="$gitdir/modules/$base_name"
 274         gitdir="$gitdir/modules/$name"
 275
 276         if test -d "$gitdir"
 277         then
 278                 mkdir -p "$sm_path"
 279                 rm -f "$gitdir/index"
 280         else
 281                 mkdir -p "$gitdir_base"
 282                 (
 283                         clear_local_git_env
 284                         git clone $quiet ${depth:+"$depth"} -n ${reference:+"$reference"} \
 285                                 --separate-git-dir "$gitdir" "$url" "$sm_path"
 286                 ) ||
 287                 die "$(eval_gettext "Clone of '\$url' into submodule path '\$sm_path' failed")"
 288         fi
 289
 290         # We already are at the root of the work tree but cd_to_toplevel will
 291         # resolve any symlinks that might be present in $PWD
 292         a=$(cd_to_toplevel && cd "$gitdir" && pwd)/
 293         b=$(cd_to_toplevel && cd "$sm_path" && pwd)/
 294         # Remove all common leading directories after a sanity check
 295         if test "${a#$b}" != "$a" || test "${b#$a}" != "$b"; then
 296                 die "$(eval_gettext "Gitdir '\$a' is part of the submodule path '\$b' or vice versa")"
 297         fi
 298         while test "${a%%/*}" = "${b%%/*}"
 299         do
 300                 a=${a#*/}
 301                 b=${b#*/}
 302         done
 303         # Now chop off the trailing '/'s that were added in the beginning
 304         a=${a%/}
 305         b=${b%/}
 306
 307         # Turn each leading "*/" component into "../"
 308         rel=$(echo $b | sed -e 's|[^/][^/]*|..|g')
 309         echo "gitdir: $rel/$a" >"$sm_path/.git"
 310
 311         rel=$(echo $a | sed -e 's|[^/][^/]*|..|g')
 312         (clear_local_git_env; cd "$sm_path" && GIT_WORK_TREE=. git config core.worktree "$rel/$b")
 313 }
 314
 315 isnumber()
 316 {
 317         n=$(($1 + 0)) 2>/dev/null && test "$n" = "$1"
 318 }
 319
 320 #
 321 # Add a new submodule to the working tree, .gitmodules and the index
 322 #
 323 # $@ = repo path
 324 #
 325 # optional branch is stored in global branch variable
 326 #
 327 cmd_add()
 328 {
 329         # parse $args after "submodule ... add".
 330         reference_path=
 331         while test $# -ne 0
 332         do
 333                 case "$1" in
 334                 -b | --branch)
 335                         case "$2" in '') usage ;; esac
 336                         branch=$2
 337                         shift
 338                         ;;
 339                 -f | --force)
 340                         force=$1
 341                         ;;
 342                 -q|--quiet)
 343                         GIT_QUIET=1
 344                         ;;
 345                 --reference)
 346                         case "$2" in '') usage ;; esac
 347                         reference_path=$2
 348                         shift
 349                         ;;
 350                 --reference=*)
 351                         reference_path="${1#--reference=}"
 352                         ;;
 353                 --name)
 354                         case "$2" in '') usage ;; esac
 355                         custom_name=$2
 356                         shift
 357                         ;;
 358                 --depth)
 359                         case "$2" in '') usage ;; esac
 360                         depth="--depth=$2"
 361                         shift
 362                         ;;
 363                 --depth=*)
 364                         depth=$1
 365                         ;;
 366                 --)
 367                         shift
 368                         break
 369                         ;;
 370                 -*)
 371                         usage
 372                         ;;
 373                 *)
 374                         break
 375                         ;;
 376                 esac
 377                 shift
 378         done
 379
 380         if test -n "$reference_path"
 381         then
 382                 is_absolute_path "$reference_path" ||
 383                 reference_path="$wt_prefix$reference_path"
 384
 385                 reference="--reference=$reference_path"
 386         fi
 387
 388         repo=$1
 389         sm_path=$2
 390
 391         if test -z "$sm_path"; then
 392                 sm_path=$(echo "$repo" |
 393                         sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
 394         fi
 395
 396         if test -z "$repo" -o -z "$sm_path"; then
 397                 usage
 398         fi
 399
 400         is_absolute_path "$sm_path" || sm_path="$wt_prefix$sm_path"
 401
 402         # assure repo is absolute or relative to parent
 403         case "$repo" in
 404         ./*|../*)
 405                 test -z "$wt_prefix" ||
 406                 die "$(gettext "Relative path can only be used from the toplevel of the working tree")"
 407
 408                 # dereference source url relative to parent's url
 409                 realrepo=$(resolve_relative_url "$repo") || exit
 410                 ;;
 411         *:*|/*)
 412                 # absolute url
 413                 realrepo=$repo
 414                 ;;
 415         *)
 416                 die "$(eval_gettext "repo URL: '\$repo' must be absolute or begin with ./|../")"
 417         ;;
 418         esac
 419
 420         # normalize path:
 421         # multiple //; leading ./; /./; /../; trailing /
 422         sm_path=$(printf '%s/\n' "$sm_path" |
 423                 sed -e '
 424                         s|//*|/|g
 425                         s|^\(\./\)*||
 426                         s|/\./|/|g
 427                         :start
 428                         s|\([^/]*\)/\.\./||
 429                         tstart
 430                         s|/*$||
 431                 ')
 432         git ls-files --error-unmatch "$sm_path" > /dev/null 2>&1 &&
 433         die "$(eval_gettext "'\$sm_path' already exists in the index")"
 434
 435         if test -z "$force" && ! git add --dry-run --ignore-missing "$sm_path" > /dev/null 2>&1
 436         then
 437                 cat >&2 <<EOF
 438 The following path is ignored by one of your .gitignore files:
 439 $(eval_gettextln $sm_path)
 440 Use -f if you really want to add it.
 441 EOF
 442                 exit 1
 443         fi
 444
 445         if test -n "$custom_name"
 446         then
 447                 sm_name="$custom_name"
 448         else
 449                 sm_name="$sm_path"
 450         fi
 451
 452         # perhaps the path exists and is already a git repo, else clone it
 453         if test -e "$sm_path"
 454         then
 455                 if test -d "$sm_path"/.git -o -f "$sm_path"/.git
 456                 then
 457                         eval_gettextln "Adding existing repo at '\$sm_path' to the index"
 458                 else
 459                         die "$(eval_gettext "'\$sm_path' already exists and is not a valid git repo")"
 460                 fi
 461
 462         else
 463                 if test -d ".git/modules/$sm_name"
 464                 then
 465                         if test -z "$force"
 466                         then
 467                                 echo >&2 "$(eval_gettext "A git directory for '\$sm_name' is found locally with remote(s):")"
 468                                 GIT_DIR=".git/modules/$sm_name" GIT_WORK_TREE=. git remote -v | grep '(fetch)' | sed -e s,^,"  ", -e s,' (fetch)',, >&2
 469                                 echo >&2 "$(eval_gettext "If you want to reuse this local git directory instead of cloning again from")"
 470                                 echo >&2 "  $realrepo"
 471                                 echo >&2 "$(eval_gettext "use the '--force' option. If the local git directory is not the correct repo")"
 472                                 die "$(eval_gettext "or you are unsure what this means choose another name with the '--name' option.")"
 473                         else
 474                                 echo "$(eval_gettext "Reactivating local git directory for submodule '\$sm_name'.")"
 475                         fi
 476                 fi
 477                 module_clone "$sm_path" "$sm_name" "$realrepo" "$reference" "$depth" || exit
 478                 (
 479                         clear_local_git_env
 480                         cd "$sm_path" &&
 481                         # ash fails to wordsplit ${branch:+-b "$branch"...}
 482                         case "$branch" in
 483                         '') git checkout -f -q ;;
 484                         ?*) git checkout -f -q -B "$branch" "origin/$branch" ;;
 485                         esac
 486                 ) || die "$(eval_gettext "Unable to checkout submodule '\$sm_path'")"
 487         fi
 488         git config submodule."$sm_name".url "$realrepo"
 489
 490         git add $force "$sm_path" ||
 491         die "$(eval_gettext "Failed to add submodule '\$sm_path'")"
 492
 493         git config -f .gitmodules submodule."$sm_name".path "$sm_path" &&
 494         git config -f .gitmodules submodule."$sm_name".url "$repo" &&
 495         if test -n "$branch"
 496         then
 497                 git config -f .gitmodules submodule."$sm_name".branch "$branch"
 498         fi &&
 499         git add --force .gitmodules ||
 500         die "$(eval_gettext "Failed to register submodule '\$sm_path'")"
 501 }
 502
 503 #
 504 # Execute an arbitrary command sequence in each checked out
 505 # submodule
 506 #
 507 # $@ = command to execute
 508 #
 509 cmd_foreach()
 510 {
 511         # parse $args after "submodule ... foreach".
 512         while test $# -ne 0
 513         do
 514                 case "$1" in
 515                 -q|--quiet)
 516                         GIT_QUIET=1
 517                         ;;
 518                 --recursive)
 519                         recursive=1
 520                         ;;
 521                 -*)
 522                         usage
 523                         ;;
 524                 *)
 525                         break
 526                         ;;
 527                 esac
 528                 shift
 529         done
 530
 531         toplevel=$(pwd)
 532
 533         # dup stdin so that it can be restored when running the external
 534         # command in the subshell (and a recursive call to this function)
 535         exec 3<&0
 536
 537         module_list |
 538         while read mode sha1 stage sm_path
 539         do
 540                 die_if_unmatched "$mode"
 541                 if test -e "$sm_path"/.git
 542                 then
 543                         displaypath=$(relative_path "$sm_path")
 544                         say "$(eval_gettext "Entering '\$prefix\$displaypath'")"
 545                         name=$(module_name "$sm_path")
 546                         (
 547                                 prefix="$prefix$sm_path/"
 548                                 clear_local_git_env
 549                                 cd "$sm_path" &&
 550                                 sm_path=$(relative_path "$sm_path") &&
 551                                 # we make $path available to scripts ...
 552                                 path=$sm_path &&
 553                                 if test $# -eq 1
 554                                 then
 555                                         eval "$1"
 556                                 else
 557                                         "$@"
 558                                 fi &&
 559                                 if test -n "$recursive"
 560                                 then
 561                                         cmd_foreach "--recursive" "$@"
 562                                 fi
 563                         ) <&3 3<&- ||
 564                         die "$(eval_gettext "Stopping at '\$prefix\$displaypath'; script returned non-zero status.")"
 565                 fi
 566         done
 567 }
 568
 569 #
 570 # Register submodules in .git/config
 571 #
 572 # $@ = requested paths (default to all)
 573 #
 574 cmd_init()
 575 {
 576         # parse $args after "submodule ... init".
 577         while test $# -ne 0
 578         do
 579                 case "$1" in
 580                 -q|--quiet)
 581                         GIT_QUIET=1
 582                         ;;
 583                 --)
 584                         shift
 585                         break
 586                         ;;
 587                 -*)
 588                         usage
 589                         ;;
 590                 *)
 591                         break
 592                         ;;
 593                 esac
 594                 shift
 595         done
 596
 597         module_list "$@" |
 598         while read mode sha1 stage sm_path
 599         do
 600                 die_if_unmatched "$mode"
 601                 name=$(module_name "$sm_path") || exit
 602
 603                 displaypath=$(relative_path "$sm_path")
 604
 605                 # Copy url setting when it is not set yet
 606                 if test -z "$(git config "submodule.$name.url")"
 607                 then
 608                         url=$(git config -f .gitmodules submodule."$name".url)
 609                         test -z "$url" &&
 610                         die "$(eval_gettext "No url found for submodule path '\$displaypath' in .gitmodules")"
 611
 612                         # Possibly a url relative to parent
 613                         case "$url" in
 614                         ./*|../*)
 615                                 url=$(resolve_relative_url "$url") || exit
 616                                 ;;
 617                         esac
 618                         git config submodule."$name".url "$url" ||
 619                         die "$(eval_gettext "Failed to register url for submodule path '\$displaypath'")"
 620
 621                         say "$(eval_gettext "Submodule '\$name' (\$url) registered for path '\$displaypath'")"
 622                 fi
 623
 624                 # Copy "update" setting when it is not set yet
 625                 if upd="$(git config -f .gitmodules submodule."$name".update)" &&
 626                    test -n "$upd" &&
 627                    test -z "$(git config submodule."$name".update)"
 628                 then
 629                         case "$upd" in
 630                         checkout | rebase | merge | none)
 631                                 ;; # known modes of updating
 632                         *)
 633                                 echo >&2 "warning: unknown update mode '$upd' suggested for submodule '$name'"
 634                                 upd=none
 635                                 ;;
 636                         esac
 637                         git config submodule."$name".update "$upd" ||
 638                         die "$(eval_gettext "Failed to register update mode for submodule path '\$displaypath'")"
 639                 fi
 640         done
 641 }
 642
 643 #
 644 # Unregister submodules from .git/config and remove their work tree
 645 #
 646 # $@ = requested paths (use '.' to deinit all submodules)
 647 #
 648 cmd_deinit()
 649 {
 650         # parse $args after "submodule ... deinit".
 651         while test $# -ne 0
 652         do
 653                 case "$1" in
 654                 -f|--force)
 655                         force=$1
 656                         ;;
 657                 -q|--quiet)
 658                         GIT_QUIET=1
 659                         ;;
 660                 --)
 661                         shift
 662                         break
 663                         ;;
 664                 -*)
 665                         usage
 666                         ;;
 667                 *)
 668                         break
 669                         ;;
 670                 esac
 671                 shift
 672         done
 673
 674         if test $# = 0
 675         then
 676                 die "$(eval_gettext "Use '.' if you really want to deinitialize all submodules")"
 677         fi
 678
 679         module_list "$@" |
 680         while read mode sha1 stage sm_path
 681         do
 682                 die_if_unmatched "$mode"
 683                 name=$(module_name "$sm_path") || exit
 684
 685                 displaypath=$(relative_path "$sm_path")
 686
 687                 # Remove the submodule work tree (unless the user already did it)
 688                 if test -d "$sm_path"
 689                 then
 690                         # Protect submodules containing a .git directory
 691                         if test -d "$sm_path/.git"
 692                         then
 693                                 echo >&2 "$(eval_gettext "Submodule work tree '\$displaypath' contains a .git directory")"
 694                                 die "$(eval_gettext "(use 'rm -rf' if you really want to remove it including all of its history)")"
 695                         fi
 696
 697                         if test -z "$force"
 698                         then
 699                                 git rm -qn "$sm_path" ||
 700                                 die "$(eval_gettext "Submodule work tree '\$displaypath' contains local modifications; use '-f' to discard them")"
 701                         fi
 702                         rm -rf "$sm_path" &&
 703                         say "$(eval_gettext "Cleared directory '\$displaypath'")" ||
 704                         say "$(eval_gettext "Could not remove submodule work tree '\$displaypath'")"
 705                 fi
 706
 707                 mkdir "$sm_path" || say "$(eval_gettext "Could not create empty submodule directory '\$displaypath'")"
 708
 709                 # Remove the .git/config entries (unless the user already did it)
 710                 if test -n "$(git config --get-regexp submodule."$name\.")"
 711                 then
 712                         # Remove the whole section so we have a clean state when
 713                         # the user later decides to init this submodule again
 714                         url=$(git config submodule."$name".url)
 715                         git config --remove-section submodule."$name" 2>/dev/null &&
 716                         say "$(eval_gettext "Submodule '\$name' (\$url) unregistered for path '\$displaypath'")"
 717                 fi
 718         done
 719 }
 720
 721 #
 722 # Update each submodule path to correct revision, using clone and checkout as needed
 723 #
 724 # $@ = requested paths (default to all)
 725 #
 726 cmd_update()
 727 {
 728         # parse $args after "submodule ... update".
 729         while test $# -ne 0
 730         do
 731                 case "$1" in
 732                 -q|--quiet)
 733                         GIT_QUIET=1
 734                         ;;
 735                 -i|--init)
 736                         init=1
 737                         ;;
 738                 --remote)
 739                         remote=1
 740                         ;;
 741                 -N|--no-fetch)
 742                         nofetch=1
 743                         ;;
 744                 -f|--force)
 745                         force=$1
 746                         ;;
 747                 -r|--rebase)
 748                         update="rebase"
 749                         ;;
 750                 --reference)
 751                         case "$2" in '') usage ;; esac
 752                         reference="--reference=$2"
 753                         shift
 754                         ;;
 755                 --reference=*)
 756                         reference="$1"
 757                         ;;
 758                 -m|--merge)
 759                         update="merge"
 760                         ;;
 761                 --recursive)
 762                         recursive=1
 763                         ;;
 764                 --checkout)
 765                         update="checkout"
 766                         ;;
 767                 --depth)
 768                         case "$2" in '') usage ;; esac
 769                         depth="--depth=$2"
 770                         shift
 771                         ;;
 772                 --depth=*)
 773                         depth=$1
 774                         ;;
 775                 --)
 776                         shift
 777                         break
 778                         ;;
 779                 -*)
 780                         usage
 781                         ;;
 782                 *)
 783                         break
 784                         ;;
 785                 esac
 786                 shift
 787         done
 788
 789         if test -n "$init"
 790         then
 791                 cmd_init "--" "$@" || return
 792         fi
 793
 794         cloned_modules=
 795         module_list "$@" | {
 796         err=
 797         while read mode sha1 stage sm_path
 798         do
 799                 die_if_unmatched "$mode"
 800                 if test "$stage" = U
 801                 then
 802                         echo >&2 "Skipping unmerged submodule $prefix$sm_path"
 803                         continue
 804                 fi
 805                 name=$(module_name "$sm_path") || exit
 806                 url=$(git config submodule."$name".url)
 807                 branch=$(get_submodule_config "$name" branch master)
 808                 if ! test -z "$update"
 809                 then
 810                         update_module=$update
 811                 else
 812                         update_module=$(git config submodule."$name".update)
 813                         if test -z "$update_module"
 814                         then
 815                                 update_module="checkout"
 816                         fi
 817                 fi
 818
 819                 displaypath=$(relative_path "$prefix$sm_path")
 820
 821                 if test "$update_module" = "none"
 822                 then
 823                         echo "Skipping submodule '$displaypath'"
 824                         continue
 825                 fi
 826
 827                 if test -z "$url"
 828                 then
 829                         # Only mention uninitialized submodules when its
 830                         # path have been specified
 831                         test "$#" != "0" &&
 832                         say "$(eval_gettext "Submodule path '\$displaypath' not initialized
 833 Maybe you want to use 'update --init'?")"
 834                         continue
 835                 fi
 836
 837                 if ! test -d "$sm_path"/.git -o -f "$sm_path"/.git
 838                 then
 839                         module_clone "$sm_path" "$name" "$url" "$reference" "$depth" || exit
 840                         cloned_modules="$cloned_modules;$name"
 841                         subsha1=
 842                 else
 843                         subsha1=$(clear_local_git_env; cd "$sm_path" &&
 844                                 git rev-parse --verify HEAD) ||
 845                         die "$(eval_gettext "Unable to find current revision in submodule path '\$displaypath'")"
 846                 fi
 847
 848                 if test -n "$remote"
 849                 then
 850                         if test -z "$nofetch"
 851                         then
 852                                 # Fetch remote before determining tracking $sha1
 853                                 (clear_local_git_env; cd "$sm_path" && git-fetch) ||
 854                                 die "$(eval_gettext "Unable to fetch in submodule path '\$sm_path'")"
 855                         fi
 856                         remote_name=$(clear_local_git_env; cd "$sm_path" && get_default_remote)
 857                         sha1=$(clear_local_git_env; cd "$sm_path" &&
 858                                 git rev-parse --verify "${remote_name}/${branch}") ||
 859                         die "$(eval_gettext "Unable to find current ${remote_name}/${branch} revision in submodule path '\$sm_path'")"
 860                 fi
 861
 862                 if test "$subsha1" != "$sha1" -o -n "$force"
 863                 then
 864                         subforce=$force
 865                         # If we don't already have a -f flag and the submodule has never been checked out
 866                         if test -z "$subsha1" -a -z "$force"
 867                         then
 868                                 subforce="-f"
 869                         fi
 870
 871                         if test -z "$nofetch"
 872                         then
 873                                 # Run fetch only if $sha1 isn't present or it
 874                                 # is not reachable from a ref.
 875                                 (clear_local_git_env; cd "$sm_path" &&
 876                                         ( (rev=$(git rev-list -n 1 $sha1 --not --all 2>/dev/null) &&
 877                                          test -z "$rev") || git-fetch)) ||
 878                                 die "$(eval_gettext "Unable to fetch in submodule path '\$displaypath'")"
 879                         fi
 880
 881                         # Is this something we just cloned?
 882                         case ";$cloned_modules;" in
 883                         *";$name;"*)
 884                                 # then there is no local change to integrate
 885                                 update_module=checkout ;;
 886                         esac
 887
 888                         must_die_on_failure=
 889                         case "$update_module" in
 890                         checkout)
 891                                 command="git checkout $subforce -q"
 892                                 die_msg="$(eval_gettext "Unable to checkout '\$sha1' in submodule path '\$displaypath'")"
 893                                 say_msg="$(eval_gettext "Submodule path '\$displaypath': checked out '\$sha1'")"
 894                                 ;;
 895                         rebase)
 896                                 command="git rebase"
 897                                 die_msg="$(eval_gettext "Unable to rebase '\$sha1' in submodule path '\$displaypath'")"
 898                                 say_msg="$(eval_gettext "Submodule path '\$displaypath': rebased into '\$sha1'")"
 899                                 must_die_on_failure=yes
 900                                 ;;
 901                         merge)
 902                                 command="git merge"
 903                                 die_msg="$(eval_gettext "Unable to merge '\$sha1' in submodule path '\$displaypath'")"
 904                                 say_msg="$(eval_gettext "Submodule path '\$displaypath': merged in '\$sha1'")"
 905                                 must_die_on_failure=yes
 906                                 ;;
 907                         !*)
 908                                 command="${update_module#!}"
 909                                 die_msg="$(eval_gettext "Execution of '\$command \$sha1' failed in submodule  path '\$prefix\$sm_path'")"
 910                                 say_msg="$(eval_gettext "Submodule path '\$prefix\$sm_path': '\$command \$sha1'")"
 911                                 must_die_on_failure=yes
 912                                 ;;
 913                         *)
 914                                 die "$(eval_gettext "Invalid update mode '$update_module' for submodule '$name'")"
 915                         esac
 916
 917                         if (clear_local_git_env; cd "$sm_path" && $command "$sha1")
 918                         then
 919                                 say "$say_msg"
 920                         elif test -n "$must_die_on_failure"
 921                         then
 922                                 die_with_status 2 "$die_msg"
 923                         else
 924                                 err="${err};$die_msg"
 925                                 continue
 926                         fi
 927                 fi
 928
 929                 if test -n "$recursive"
 930                 then
 931                         (
 932                                 prefix="$prefix$sm_path/"
 933                                 clear_local_git_env
 934                                 cd "$sm_path" &&
 935                                 eval cmd_update
 936                         )
 937                         res=$?
 938                         if test $res -gt 0
 939                         then
 940                                 die_msg="$(eval_gettext "Failed to recurse into submodule path '\$displaypath'")"
 941                                 if test $res -eq 1
 942                                 then
 943                                         err="${err};$die_msg"
 944                                         continue
 945                                 else
 946                                         die_with_status $res "$die_msg"
 947                                 fi
 948                         fi
 949                 fi
 950         done
 951
 952         if test -n "$err"
 953         then
 954                 OIFS=$IFS
 955                 IFS=';'
 956                 for e in $err
 957                 do
 958                         if test -n "$e"
 959                         then
 960                                 echo >&2 "$e"
 961                         fi
 962                 done
 963                 IFS=$OIFS
 964                 exit 1
 965         fi
 966         }
 967 }
 968
 969 set_name_rev () {
 970         revname=$( (
 971                 clear_local_git_env
 972                 cd "$1" && {
 973                         git describe "$2" 2>/dev/null ||
 974                         git describe --tags "$2" 2>/dev/null ||
 975                         git describe --contains "$2" 2>/dev/null ||
 976                         git describe --all --always "$2"
 977                 }
 978         ) )
 979         test -z "$revname" || revname=" ($revname)"
 980 }
 981 #
 982 # Show commit summary for submodules in index or working tree
 983 #
 984 # If '--cached' is given, show summary between index and given commit,
 985 # or between working tree and given commit
 986 #
 987 # $@ = [commit (default 'HEAD'),] requested paths (default all)
 988 #
 989 cmd_summary() {
 990         summary_limit=-1
 991         for_status=
 992         diff_cmd=diff-index
 993
 994         # parse $args after "submodule ... summary".
 995         while test $# -ne 0
 996         do
 997                 case "$1" in
 998                 --cached)
 999                         cached="$1"
1000                         ;;
1001                 --files)
1002                         files="$1"
1003                         ;;
1004                 --for-status)
1005                         for_status="$1"
1006                         ;;
1007                 -n|--summary-limit)
1008                         summary_limit="$2"
1009                         isnumber "$summary_limit" || usage
1010                         shift
1011                         ;;
1012                 --summary-limit=*)
1013                         summary_limit="${1#--summary-limit=}"
1014                         isnumber "$summary_limit" || usage
1015                         ;;
1016                 --)
1017                         shift
1018                         break
1019                         ;;
1020                 -*)
1021                         usage
1022                         ;;
1023                 *)
1024                         break
1025                         ;;
1026                 esac
1027                 shift
1028         done
1029
1030         test $summary_limit = 0 && return
1031
1032         if rev=$(git rev-parse -q --verify --default HEAD ${1+"$1"})
1033         then
1034                 head=$rev
1035                 test $# = 0 || shift
1036         elif test -z "$1" -o "$1" = "HEAD"
1037         then
1038                 # before the first commit: compare with an empty tree
1039                 head=$(git hash-object -w -t tree --stdin </dev/null)
1040                 test -z "$1" || shift
1041         else
1042                 head="HEAD"
1043         fi
1044
1045         if [ -n "$files" ]
1046         then
1047                 test -n "$cached" &&
1048                 die "$(gettext "The --cached option cannot be used with the --files option")"
1049                 diff_cmd=diff-files
1050                 head=
1051         fi
1052
1053         cd_to_toplevel
1054         eval "set $(git rev-parse --sq --prefix "$wt_prefix" -- "$@")"
1055         # Get modified modules cared by user
1056         modules=$(git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- "$@" |
1057                 sane_egrep '^:([0-7]* )?160000' |
1058                 while read mod_src mod_dst sha1_src sha1_dst status sm_path
1059                 do
1060                         # Always show modules deleted or type-changed (blob<->module)
1061                         test $status = D -o $status = T && echo "$sm_path" && continue
1062                         # Respect the ignore setting for --for-status.
1063                         if test -n "$for_status"
1064                         then
1065                                 name=$(module_name "$sm_path")
1066                                 ignore_config=$(get_submodule_config "$name" ignore none)
1067                                 test $status != A -a $ignore_config = all && continue
1068                         fi
1069                         # Also show added or modified modules which are checked out
1070                         GIT_DIR="$sm_path/.git" git-rev-parse --git-dir >/dev/null 2>&1 &&
1071                         echo "$sm_path"
1072                 done
1073         )
1074
1075         test -z "$modules" && return
1076
1077         git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- $modules |
1078         sane_egrep '^:([0-7]* )?160000' |
1079         cut -c2- |
1080         while read mod_src mod_dst sha1_src sha1_dst status name
1081         do
1082                 if test -z "$cached" &&
1083                         test $sha1_dst = 0000000000000000000000000000000000000000
1084                 then
1085                         case "$mod_dst" in
1086                         160000)
1087                                 sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
1088                                 ;;
1089                         100644 | 100755 | 120000)
1090                                 sha1_dst=$(git hash-object $name)
1091                                 ;;
1092                         000000)
1093                                 ;; # removed
1094                         *)
1095                                 # unexpected type
1096                                 eval_gettextln "unexpected mode \$mod_dst" >&2
1097                                 continue ;;
1098                         esac
1099                 fi
1100                 missing_src=
1101                 missing_dst=
1102
1103                 test $mod_src = 160000 &&
1104                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_src^0 >/dev/null &&
1105                 missing_src=t
1106
1107                 test $mod_dst = 160000 &&
1108                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_dst^0 >/dev/null &&
1109                 missing_dst=t
1110
1111                 display_name=$(relative_path "$name")
1112
1113                 total_commits=
1114                 case "$missing_src,$missing_dst" in
1115                 t,)
1116                         errmsg="$(eval_gettext "  Warn: \$display_name doesn't contain commit \$sha1_src")"
1117                         ;;
1118                 ,t)
1119                         errmsg="$(eval_gettext "  Warn: \$display_name doesn't contain commit \$sha1_dst")"
1120                         ;;
1121                 t,t)
1122                         errmsg="$(eval_gettext "  Warn: \$display_name doesn't contain commits \$sha1_src and \$sha1_dst")"
1123                         ;;
1124                 *)
1125                         errmsg=
1126                         total_commits=$(
1127                         if test $mod_src = 160000 -a $mod_dst = 160000
1128                         then
1129                                 range="$sha1_src...$sha1_dst"
1130                         elif test $mod_src = 160000
1131                         then
1132                                 range=$sha1_src
1133                         else
1134                                 range=$sha1_dst
1135                         fi
1136                         GIT_DIR="$name/.git" \
1137                         git rev-list --first-parent $range -- | wc -l
1138                         )
1139                         total_commits=" ($(($total_commits + 0)))"
1140                         ;;
1141                 esac
1142
1143                 sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
1144                 sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
1145                 if test $status = T
1146                 then
1147                         blob="$(gettext "blob")"
1148                         submodule="$(gettext "submodule")"
1149                         if test $mod_dst = 160000
1150                         then
1151                                 echo "* $display_name $sha1_abbr_src($blob)->$sha1_abbr_dst($submodule)$total_commits:"
1152                         else
1153                                 echo "* $display_name $sha1_abbr_src($submodule)->$sha1_abbr_dst($blob)$total_commits:"
1154                         fi
1155                 else
1156                         echo "* $display_name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
1157                 fi
1158                 if test -n "$errmsg"
1159                 then
1160                         # Don't give error msg for modification whose dst is not submodule
1161                         # i.e. deleted or changed to blob
1162                         test $mod_dst = 160000 && echo "$errmsg"
1163                 else
1164                         if test $mod_src = 160000 -a $mod_dst = 160000
1165                         then
1166                                 limit=
1167                                 test $summary_limit -gt 0 && limit="-$summary_limit"
1168                                 GIT_DIR="$name/.git" \
1169                                 git log $limit --pretty='format:  %m %s' \
1170                                 --first-parent $sha1_src...$sha1_dst
1171                         elif test $mod_dst = 160000
1172                         then
1173                                 GIT_DIR="$name/.git" \
1174                                 git log --pretty='format:  > %s' -1 $sha1_dst
1175                         else
1176                                 GIT_DIR="$name/.git" \
1177                                 git log --pretty='format:  < %s' -1 $sha1_src
1178                         fi
1179                         echo
1180                 fi
1181                 echo
1182         done
1183 }
1184 #
1185 # List all submodules, prefixed with:
1186 #  - submodule not initialized
1187 #  + different revision checked out
1188 #
1189 # If --cached was specified the revision in the index will be printed
1190 # instead of the currently checked out revision.
1191 #
1192 # $@ = requested paths (default to all)
1193 #
1194 cmd_status()
1195 {
1196         # parse $args after "submodule ... status".
1197         while test $# -ne 0
1198         do
1199                 case "$1" in
1200                 -q|--quiet)
1201                         GIT_QUIET=1
1202                         ;;
1203                 --cached)
1204                         cached=1
1205                         ;;
1206                 --recursive)
1207                         recursive=1
1208                         ;;
1209                 --)
1210                         shift
1211                         break
1212                         ;;
1213                 -*)
1214                         usage
1215                         ;;
1216                 *)
1217                         break
1218                         ;;
1219                 esac
1220                 shift
1221         done
1222
1223         module_list "$@" |
1224         while read mode sha1 stage sm_path
1225         do
1226                 die_if_unmatched "$mode"
1227                 name=$(module_name "$sm_path") || exit
1228                 url=$(git config submodule."$name".url)
1229                 displaypath=$(relative_path "$prefix$sm_path")
1230                 if test "$stage" = U
1231                 then
1232                         say "U$sha1 $displaypath"
1233                         continue
1234                 fi
1235                 if test -z "$url" || ! test -d "$sm_path"/.git -o -f "$sm_path"/.git
1236                 then
1237                         say "-$sha1 $displaypath"
1238                         continue;
1239                 fi
1240                 if git diff-files --ignore-submodules=dirty --quiet -- "$sm_path"
1241                 then
1242                         set_name_rev "$sm_path" "$sha1"
1243                         say " $sha1 $displaypath$revname"
1244                 else
1245                         if test -z "$cached"
1246                         then
1247                                 sha1=$(clear_local_git_env; cd "$sm_path" && git rev-parse --verify HEAD)
1248                         fi
1249                         set_name_rev "$sm_path" "$sha1"
1250                         say "+$sha1 $displaypath$revname"
1251                 fi
1252
1253                 if test -n "$recursive"
1254                 then
1255                         (
1256                                 prefix="$displaypath/"
1257                                 clear_local_git_env
1258                                 cd "$sm_path" &&
1259                                 eval cmd_status
1260                         ) ||
1261                         die "$(eval_gettext "Failed to recurse into submodule path '\$sm_path'")"
1262                 fi
1263         done
1264 }
1265 #
1266 # Sync remote urls for submodules
1267 # This makes the value for remote.$remote.url match the value
1268 # specified in .gitmodules.
1269 #
1270 cmd_sync()
1271 {
1272         while test $# -ne 0
1273         do
1274                 case "$1" in
1275                 -q|--quiet)
1276                         GIT_QUIET=1
1277                         shift
1278                         ;;
1279                 --recursive)
1280                         recursive=1
1281                         shift
1282                         ;;
1283                 --)
1284                         shift
1285                         break
1286                         ;;
1287                 -*)
1288                         usage
1289                         ;;
1290                 *)
1291                         break
1292                         ;;
1293                 esac
1294         done
1295         cd_to_toplevel
1296         module_list "$@" |
1297         while read mode sha1 stage sm_path
1298         do
1299                 die_if_unmatched "$mode"
1300                 name=$(module_name "$sm_path")
1301                 url=$(git config -f .gitmodules --get submodule."$name".url)
1302
1303                 # Possibly a url relative to parent
1304                 case "$url" in
1305                 ./*|../*)
1306                         # rewrite foo/bar as ../.. to find path from
1307                         # submodule work tree to superproject work tree
1308                         up_path="$(echo "$sm_path" | sed "s/[^/][^/]*/../g")" &&
1309                         # guarantee a trailing /
1310                         up_path=${up_path%/}/ &&
1311                         # path from submodule work tree to submodule origin repo
1312                         sub_origin_url=$(resolve_relative_url "$url" "$up_path") &&
1313                         # path from superproject work tree to submodule origin repo
1314                         super_config_url=$(resolve_relative_url "$url") || exit
1315                         ;;
1316                 *)
1317                         sub_origin_url="$url"
1318                         super_config_url="$url"
1319                         ;;
1320                 esac
1321
1322                 if git config "submodule.$name.url" >/dev/null 2>/dev/null
1323                 then
1324                         displaypath=$(relative_path "$prefix$sm_path")
1325                         say "$(eval_gettext "Synchronizing submodule url for '\$displaypath'")"
1326                         git config submodule."$name".url "$super_config_url"
1327
1328                         if test -e "$sm_path"/.git
1329                         then
1330                         (
1331                                 clear_local_git_env
1332                                 cd "$sm_path"
1333                                 remote=$(get_default_remote)
1334                                 git config remote."$remote".url "$sub_origin_url"
1335
1336                                 if test -n "$recursive"
1337                                 then
1338                                         prefix="$prefix$sm_path/"
1339                                         eval cmd_sync
1340                                 fi
1341                         )
1342                         fi
1343                 fi
1344         done
1345 }
1346
1347 # This loop parses the command line arguments to find the
1348 # subcommand name to dispatch.  Parsing of the subcommand specific
1349 # options are primarily done by the subcommand implementations.
1350 # Subcommand specific options such as --branch and --cached are
1351 # parsed here as well, for backward compatibility.
1352
1353 while test $# != 0 && test -z "$command"
1354 do
1355         case "$1" in
1356         add | foreach | init | deinit | update | status | summary | sync)
1357                 command=$1
1358                 ;;
1359         -q|--quiet)
1360                 GIT_QUIET=1
1361                 ;;
1362         -b|--branch)
1363                 case "$2" in
1364                 '')
1365                         usage
1366                         ;;
1367                 esac
1368                 branch="$2"; shift
1369                 ;;
1370         --cached)
1371                 cached="$1"
1372                 ;;
1373         --)
1374                 break
1375                 ;;
1376         -*)
1377                 usage
1378                 ;;
1379         *)
1380                 break
1381                 ;;
1382         esac
1383         shift
1384 done
1385
1386 # No command word defaults to "status"
1387 if test -z "$command"
1388 then
1389     if test $# = 0
1390     then
1391         command=status
1392     else
1393         usage
1394     fi
1395 fi
1396
1397 # "-b branch" is accepted only by "add"
1398 if test -n "$branch" && test "$command" != add
1399 then
1400         usage
1401 fi
1402
1403 # "--cached" is accepted only by "status" and "summary"
1404 if test -n "$cached" && test "$command" != status -a "$command" != summary
1405 then
1406         usage
1407 fi
1408
1409 "cmd_$command" "$@"