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