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