git.oblomov.eu Git - git/blob - 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] update [--init] [--remote] [-N|--no-fetch] [-f|--force] [--rebase] [--reference <repository>] [--merge] [--recursive] [--] [<path>...]
  12    or: $dashless [--quiet] summary [--cached|--files] [--summary-limit <n>] [commit] [--] [<path>...]
  13    or: $dashless [--quiet] foreach [--recursive] <command>
  14    or: $dashless [--quiet] sync [--recursive] [--] [<path>...]"
  15 OPTIONS_SPEC=
  16 . git-sh-setup
  17 . git-sh-i18n
  18 . git-parse-remote
  19 require_work_tree
  20
  21 command=
  22 branch=
  23 force=
  24 reference=
  25 cached=
  26 recursive=
  27 init=
  28 files=
  29 remote=
  30 nofetch=
  31 update=
  32 prefix=
  33 custom_name=
  34
  35 # The function takes at most 2 arguments. The first argument is the
  36 # URL that navigates to the submodule origin repo. When relative, this URL
  37 # is relative to the superproject origin URL repo. The second up_path
  38 # argument, if specified, is the relative path that navigates
  39 # from the submodule working tree to the superproject working tree.
  40 #
  41 # The output of the function is the origin URL of the submodule.
  42 #
  43 # The output will either be an absolute URL or filesystem path (if the
  44 # superproject origin URL is an absolute URL or filesystem path,
  45 # respectively) or a relative file system path (if the superproject
  46 # origin URL is a relative file system path).
  47 #
  48 # When the output is a relative file system path, the path is either
  49 # relative to the submodule working tree, if up_path is specified, or to
  50 # the superproject working tree otherwise.
  51 resolve_relative_url ()
  52 {
  53         remote=$(get_default_remote)
  54         remoteurl=$(git config "remote.$remote.url") ||
  55                 remoteurl=$(pwd) # the repository is its own authoritative upstream
  56         url="$1"
  57         remoteurl=${remoteurl%/}
  58         sep=/
  59         up_path="$2"
  60
  61         case "$remoteurl" in
  62         *:*|/*)
  63                 is_relative=
  64                 ;;
  65         ./*|../*)
  66                 is_relative=t
  67                 ;;
  68         *)
  69                 is_relative=t
  70                 remoteurl="./$remoteurl"
  71                 ;;
  72         esac
  73
  74         while test -n "$url"
  75         do
  76                 case "$url" in
  77                 ../*)
  78                         url="${url#../}"
  79                         case "$remoteurl" in
  80                         */*)
  81                                 remoteurl="${remoteurl%/*}"
  82                                 ;;
  83                         *:*)
  84                                 remoteurl="${remoteurl%:*}"
  85                                 sep=:
  86                                 ;;
  87                         *)
  88                                 if test -z "$is_relative" || test "." = "$remoteurl"
  89                                 then
  90                                         die "$(eval_gettext "cannot strip one component off url '\$remoteurl'")"
  91                                 else
  92                                         remoteurl=.
  93                                 fi
  94                                 ;;
  95                         esac
  96                         ;;
  97                 ./*)
  98                         url="${url#./}"
  99                         ;;
 100                 *)
 101                         break;;
 102                 esac
 103         done
 104         remoteurl="$remoteurl$sep${url%/}"
 105         echo "${is_relative:+${up_path}}${remoteurl#./}"
 106 }
 107
 108 #
 109 # Get submodule info for registered submodules
 110 # $@ = path to limit submodule list
 111 #
 112 module_list()
 113 {
 114         (
 115                 git ls-files --error-unmatch --stage -- "$@" ||
 116                 echo "unmatched pathspec exists"
 117         ) |
 118         perl -e '
 119         my %unmerged = ();
 120         my ($null_sha1) = ("0" x 40);
 121         my @out = ();
 122         my $unmatched = 0;
 123         while (<STDIN>) {
 124                 if (/^unmatched pathspec/) {
 125                         $unmatched = 1;
 126                         next;
 127                 }
 128                 chomp;
 129                 my ($mode, $sha1, $stage, $path) =
 130                         /^([0-7]+) ([0-9a-f]{40}) ([0-3])\t(.*)$/;
 131                 next unless $mode eq "160000";
 132                 if ($stage ne "0") {
 133                         if (!$unmerged{$path}++) {
 134                                 push @out, "$mode $null_sha1 U\t$path\n";
 135                         }
 136                         next;
 137                 }
 138                 push @out, "$_\n";
 139         }
 140         if ($unmatched) {
 141                 print "#unmatched\n";
 142         } else {
 143                 print for (@out);
 144         }
 145         '
 146 }
 147
 148 die_if_unmatched ()
 149 {
 150         if test "$1" = "#unmatched"
 151         then
 152                 exit 1
 153         fi
 154 }
 155
 156 #
 157 # Print a submodule configuration setting
 158 #
 159 # $1 = submodule name
 160 # $2 = option name
 161 # $3 = default value
 162 #
 163 # Checks in the usual git-config places first (for overrides),
 164 # otherwise it falls back on .gitmodules.  This allows you to
 165 # distribute project-wide defaults in .gitmodules, while still
 166 # customizing individual repositories if necessary.  If the option is
 167 # not in .gitmodules either, print a default value.
 168 #
 169 get_submodule_config () {
 170         name="$1"
 171         option="$2"
 172         default="$3"
 173         value=$(git config submodule."$name"."$option")
 174         if test -z "$value"
 175         then
 176                 value=$(git config -f .gitmodules submodule."$name"."$option")
 177         fi
 178         printf '%s' "${value:-$default}"
 179 }
 180
 181
 182 #
 183 # Map submodule path to submodule name
 184 #
 185 # $1 = path
 186 #
 187 module_name()
 188 {
 189         # Do we have "submodule.<something>.path = $1" defined in .gitmodules file?
 190         sm_path="$1"
 191         re=$(printf '%s\n' "$1" | sed -e 's/[].[^$\\*]/\\&/g')
 192         name=$( git config -f .gitmodules --get-regexp '^submodule\..*\.path$' |
 193                 sed -n -e 's|^submodule\.\(.*\)\.path '"$re"'$|\1|p' )
 194         test -z "$name" &&
 195         die "$(eval_gettext "No submodule mapping found in .gitmodules for path '\$sm_path'")"
 196         echo "$name"
 197 }
 198
 199 #
 200 # Clone a submodule
 201 #
 202 # Prior to calling, cmd_update checks that a possibly existing
 203 # path is not a git repository.
 204 # Likewise, cmd_add checks that path does not exist at all,
 205 # since it is the location of a new submodule.
 206 #
 207 module_clone()
 208 {
 209         sm_path=$1
 210         name=$2
 211         url=$3
 212         reference="$4"
 213         quiet=
 214         if test -n "$GIT_QUIET"
 215         then
 216                 quiet=-q
 217         fi
 218
 219         gitdir=
 220         gitdir_base=
 221         base_name=$(dirname "$name")
 222
 223         gitdir=$(git rev-parse --git-dir)
 224         gitdir_base="$gitdir/modules/$base_name"
 225         gitdir="$gitdir/modules/$name"
 226
 227         if test -d "$gitdir"
 228         then
 229                 mkdir -p "$sm_path"
 230                 rm -f "$gitdir/index"
 231         else
 232                 mkdir -p "$gitdir_base"
 233                 (
 234                         clear_local_git_env
 235                         git clone $quiet -n ${reference:+"$reference"} \
 236                                 --separate-git-dir "$gitdir" "$url" "$sm_path"
 237                 ) ||
 238                 die "$(eval_gettext "Clone of '\$url' into submodule path '\$sm_path' failed")"
 239         fi
 240
 241         # We already are at the root of the work tree but cd_to_toplevel will
 242         # resolve any symlinks that might be present in $PWD
 243         a=$(cd_to_toplevel && cd "$gitdir" && pwd)/
 244         b=$(cd_to_toplevel && cd "$sm_path" && pwd)/
 245         # normalize Windows-style absolute paths to POSIX-style absolute paths
 246         case $a in [a-zA-Z]:/*) a=/${a%%:*}${a#*:} ;; esac
 247         case $b in [a-zA-Z]:/*) b=/${b%%:*}${b#*:} ;; esac
 248         # Remove all common leading directories after a sanity check
 249         if test "${a#$b}" != "$a" || test "${b#$a}" != "$b"; then
 250                 die "$(eval_gettext "Gitdir '\$a' is part of the submodule path '\$b' or vice versa")"
 251         fi
 252         while test "${a%%/*}" = "${b%%/*}"
 253         do
 254                 a=${a#*/}
 255                 b=${b#*/}
 256         done
 257         # Now chop off the trailing '/'s that were added in the beginning
 258         a=${a%/}
 259         b=${b%/}
 260
 261         # Turn each leading "*/" component into "../"
 262         rel=$(echo $b | sed -e 's|[^/][^/]*|..|g')
 263         echo "gitdir: $rel/$a" >"$sm_path/.git"
 264
 265         rel=$(echo $a | sed -e 's|[^/][^/]*|..|g')
 266         (clear_local_git_env; cd "$sm_path" && GIT_WORK_TREE=. git config core.worktree "$rel/$b")
 267 }
 268
 269 isnumber()
 270 {
 271         n=$(($1 + 0)) 2>/dev/null && test "$n" = "$1"
 272 }
 273
 274 #
 275 # Add a new submodule to the working tree, .gitmodules and the index
 276 #
 277 # $@ = repo path
 278 #
 279 # optional branch is stored in global branch variable
 280 #
 281 cmd_add()
 282 {
 283         # parse $args after "submodule ... add".
 284         while test $# -ne 0
 285         do
 286                 case "$1" in
 287                 -b | --branch)
 288                         case "$2" in '') usage ;; esac
 289                         branch=$2
 290                         shift
 291                         ;;
 292                 -f | --force)
 293                         force=$1
 294                         ;;
 295                 -q|--quiet)
 296                         GIT_QUIET=1
 297                         ;;
 298                 --reference)
 299                         case "$2" in '') usage ;; esac
 300                         reference="--reference=$2"
 301                         shift
 302                         ;;
 303                 --reference=*)
 304                         reference="$1"
 305                         ;;
 306                 --name)
 307                         case "$2" in '') usage ;; esac
 308                         custom_name=$2
 309                         shift
 310                         ;;
 311                 --)
 312                         shift
 313                         break
 314                         ;;
 315                 -*)
 316                         usage
 317                         ;;
 318                 *)
 319                         break
 320                         ;;
 321                 esac
 322                 shift
 323         done
 324
 325         repo=$1
 326         sm_path=$2
 327
 328         if test -z "$sm_path"; then
 329                 sm_path=$(echo "$repo" |
 330                         sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
 331         fi
 332
 333         if test -z "$repo" -o -z "$sm_path"; then
 334                 usage
 335         fi
 336
 337         # assure repo is absolute or relative to parent
 338         case "$repo" in
 339         ./*|../*)
 340                 # dereference source url relative to parent's url
 341                 realrepo=$(resolve_relative_url "$repo") || exit
 342                 ;;
 343         *:*|/*)
 344                 # absolute url
 345                 realrepo=$repo
 346                 ;;
 347         *)
 348                 die "$(eval_gettext "repo URL: '\$repo' must be absolute or begin with ./|../")"
 349         ;;
 350         esac
 351
 352         # normalize path:
 353         # multiple //; leading ./; /./; /../; trailing /
 354         sm_path=$(printf '%s/\n' "$sm_path" |
 355                 sed -e '
 356                         s|//*|/|g
 357                         s|^\(\./\)*||
 358                         s|/\./|/|g
 359                         :start
 360                         s|\([^/]*\)/\.\./||
 361                         tstart
 362                         s|/*$||
 363                 ')
 364         git ls-files --error-unmatch "$sm_path" > /dev/null 2>&1 &&
 365         die "$(eval_gettext "'\$sm_path' already exists in the index")"
 366
 367         if test -z "$force" && ! git add --dry-run --ignore-missing "$sm_path" > /dev/null 2>&1
 368         then
 369                 eval_gettextln "The following path is ignored by one of your .gitignore files:
 370 \$sm_path
 371 Use -f if you really want to add it." >&2
 372                 exit 1
 373         fi
 374
 375         if test -n "$custom_name"
 376         then
 377                 sm_name="$custom_name"
 378         else
 379                 sm_name="$sm_path"
 380         fi
 381
 382         # perhaps the path exists and is already a git repo, else clone it
 383         if test -e "$sm_path"
 384         then
 385                 if test -d "$sm_path"/.git -o -f "$sm_path"/.git
 386                 then
 387                         eval_gettextln "Adding existing repo at '\$sm_path' to the index"
 388                 else
 389                         die "$(eval_gettext "'\$sm_path' already exists and is not a valid git repo")"
 390                 fi
 391
 392         else
 393                 if test -d ".git/modules/$sm_name"
 394                 then
 395                         if test -z "$force"
 396                         then
 397                                 echo >&2 "$(eval_gettext "A git directory for '\$sm_name' is found locally with remote(s):")"
 398                                 GIT_DIR=".git/modules/$sm_name" GIT_WORK_TREE=. git remote -v | grep '(fetch)' | sed -e s,^,"  ", -e s,' (fetch)',, >&2
 399                                 echo >&2 "$(eval_gettext "If you want to reuse this local git directory instead of cloning again from")"
 400                                 echo >&2 "  $realrepo"
 401                                 echo >&2 "$(eval_gettext "use the '--force' option. If the local git directory is not the correct repo")"
 402                                 die "$(eval_gettext "or you are unsure what this means choose another name with the '--name' option.")"
 403                         else
 404                                 echo "$(eval_gettext "Reactivating local git directory for submodule '\$sm_name'.")"
 405                         fi
 406                 fi
 407                 module_clone "$sm_path" "$sm_name" "$realrepo" "$reference" || exit
 408                 (
 409                         clear_local_git_env
 410                         cd "$sm_path" &&
 411                         # ash fails to wordsplit ${branch:+-b "$branch"...}
 412                         case "$branch" in
 413                         '') git checkout -f -q ;;
 414                         ?*) git checkout -f -q -B "$branch" "origin/$branch" ;;
 415                         esac
 416                 ) || die "$(eval_gettext "Unable to checkout submodule '\$sm_path'")"
 417         fi
 418         git config submodule."$sm_name".url "$realrepo"
 419
 420         git add $force "$sm_path" ||
 421         die "$(eval_gettext "Failed to add submodule '\$sm_path'")"
 422
 423         git config -f .gitmodules submodule."$sm_name".path "$sm_path" &&
 424         git config -f .gitmodules submodule."$sm_name".url "$repo" &&
 425         if test -n "$branch"
 426         then
 427                 git config -f .gitmodules submodule."$sm_name".branch "$branch"
 428         fi &&
 429         git add --force .gitmodules ||
 430         die "$(eval_gettext "Failed to register submodule '\$sm_path'")"
 431 }
 432
 433 #
 434 # Execute an arbitrary command sequence in each checked out
 435 # submodule
 436 #
 437 # $@ = command to execute
 438 #
 439 cmd_foreach()
 440 {
 441         # parse $args after "submodule ... foreach".
 442         while test $# -ne 0
 443         do
 444                 case "$1" in
 445                 -q|--quiet)
 446                         GIT_QUIET=1
 447                         ;;
 448                 --recursive)
 449                         recursive=1
 450                         ;;
 451                 -*)
 452                         usage
 453                         ;;
 454                 *)
 455                         break
 456                         ;;
 457                 esac
 458                 shift
 459         done
 460
 461         toplevel=$(pwd)
 462
 463         # dup stdin so that it can be restored when running the external
 464         # command in the subshell (and a recursive call to this function)
 465         exec 3<&0
 466
 467         module_list |
 468         while read mode sha1 stage sm_path
 469         do
 470                 die_if_unmatched "$mode"
 471                 if test -e "$sm_path"/.git
 472                 then
 473                         say "$(eval_gettext "Entering '\$prefix\$sm_path'")"
 474                         name=$(module_name "$sm_path")
 475                         (
 476                                 prefix="$prefix$sm_path/"
 477                                 clear_local_git_env
 478                                 # we make $path available to scripts ...
 479                                 path=$sm_path
 480                                 cd "$sm_path" &&
 481                                 eval "$@" &&
 482                                 if test -n "$recursive"
 483                                 then
 484                                         cmd_foreach "--recursive" "$@"
 485                                 fi
 486                         ) <&3 3<&- ||
 487                         die "$(eval_gettext "Stopping at '\$sm_path'; script returned non-zero status.")"
 488                 fi
 489         done
 490 }
 491
 492 #
 493 # Register submodules in .git/config
 494 #
 495 # $@ = requested paths (default to all)
 496 #
 497 cmd_init()
 498 {
 499         # parse $args after "submodule ... init".
 500         while test $# -ne 0
 501         do
 502                 case "$1" in
 503                 -q|--quiet)
 504                         GIT_QUIET=1
 505                         ;;
 506                 --)
 507                         shift
 508                         break
 509                         ;;
 510                 -*)
 511                         usage
 512                         ;;
 513                 *)
 514                         break
 515                         ;;
 516                 esac
 517                 shift
 518         done
 519
 520         module_list "$@" |
 521         while read mode sha1 stage sm_path
 522         do
 523                 die_if_unmatched "$mode"
 524                 name=$(module_name "$sm_path") || exit
 525
 526                 # Copy url setting when it is not set yet
 527                 if test -z "$(git config "submodule.$name.url")"
 528                 then
 529                         url=$(git config -f .gitmodules submodule."$name".url)
 530                         test -z "$url" &&
 531                         die "$(eval_gettext "No url found for submodule path '\$sm_path' in .gitmodules")"
 532
 533                         # Possibly a url relative to parent
 534                         case "$url" in
 535                         ./*|../*)
 536                                 url=$(resolve_relative_url "$url") || exit
 537                                 ;;
 538                         esac
 539                         git config submodule."$name".url "$url" ||
 540                         die "$(eval_gettext "Failed to register url for submodule path '\$sm_path'")"
 541
 542                         say "$(eval_gettext "Submodule '\$name' (\$url) registered for path '\$sm_path'")"
 543                 fi
 544
 545                 # Copy "update" setting when it is not set yet
 546                 upd="$(git config -f .gitmodules submodule."$name".update)"
 547                 test -z "$upd" ||
 548                 test -n "$(git config submodule."$name".update)" ||
 549                 git config submodule."$name".update "$upd" ||
 550                 die "$(eval_gettext "Failed to register update mode for submodule path '\$sm_path'")"
 551         done
 552 }
 553
 554 #
 555 # Update each submodule path to correct revision, using clone and checkout as needed
 556 #
 557 # $@ = requested paths (default to all)
 558 #
 559 cmd_update()
 560 {
 561         # parse $args after "submodule ... update".
 562         orig_flags=
 563         while test $# -ne 0
 564         do
 565                 case "$1" in
 566                 -q|--quiet)
 567                         GIT_QUIET=1
 568                         ;;
 569                 -i|--init)
 570                         init=1
 571                         ;;
 572                 --remote)
 573                         remote=1
 574                         ;;
 575                 -N|--no-fetch)
 576                         nofetch=1
 577                         ;;
 578                 -f|--force)
 579                         force=$1
 580                         ;;
 581                 -r|--rebase)
 582                         update="rebase"
 583                         ;;
 584                 --reference)
 585                         case "$2" in '') usage ;; esac
 586                         reference="--reference=$2"
 587                         orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 588                         shift
 589                         ;;
 590                 --reference=*)
 591                         reference="$1"
 592                         ;;
 593                 -m|--merge)
 594                         update="merge"
 595                         ;;
 596                 --recursive)
 597                         recursive=1
 598                         ;;
 599                 --checkout)
 600                         update="checkout"
 601                         ;;
 602                 --)
 603                         shift
 604                         break
 605                         ;;
 606                 -*)
 607                         usage
 608                         ;;
 609                 *)
 610                         break
 611                         ;;
 612                 esac
 613                 orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 614                 shift
 615         done
 616
 617         if test -n "$init"
 618         then
 619                 cmd_init "--" "$@" || return
 620         fi
 621
 622         cloned_modules=
 623         module_list "$@" | {
 624         err=
 625         while read mode sha1 stage sm_path
 626         do
 627                 die_if_unmatched "$mode"
 628                 if test "$stage" = U
 629                 then
 630                         echo >&2 "Skipping unmerged submodule $prefix$sm_path"
 631                         continue
 632                 fi
 633                 name=$(module_name "$sm_path") || exit
 634                 url=$(git config submodule."$name".url)
 635                 branch=$(get_submodule_config "$name" branch master)
 636                 if ! test -z "$update"
 637                 then
 638                         update_module=$update
 639                 else
 640                         update_module=$(git config submodule."$name".update)
 641                 fi
 642
 643                 if test "$update_module" = "none"
 644                 then
 645                         echo "Skipping submodule '$prefix$sm_path'"
 646                         continue
 647                 fi
 648
 649                 if test -z "$url"
 650                 then
 651                         # Only mention uninitialized submodules when its
 652                         # path have been specified
 653                         test "$#" != "0" &&
 654                         say "$(eval_gettext "Submodule path '\$prefix\$sm_path' not initialized
 655 Maybe you want to use 'update --init'?")"
 656                         continue
 657                 fi
 658
 659                 if ! test -d "$sm_path"/.git -o -f "$sm_path"/.git
 660                 then
 661                         module_clone "$sm_path" "$name" "$url" "$reference" || exit
 662                         cloned_modules="$cloned_modules;$name"
 663                         subsha1=
 664                 else
 665                         subsha1=$(clear_local_git_env; cd "$sm_path" &&
 666                                 git rev-parse --verify HEAD) ||
 667                         die "$(eval_gettext "Unable to find current revision in submodule path '\$prefix\$sm_path'")"
 668                 fi
 669
 670                 if test -n "$remote"
 671                 then
 672                         if test -z "$nofetch"
 673                         then
 674                                 # Fetch remote before determining tracking $sha1
 675                                 (clear_local_git_env; cd "$sm_path" && git-fetch) ||
 676                                 die "$(eval_gettext "Unable to fetch in submodule path '\$sm_path'")"
 677                         fi
 678                         remote_name=$(clear_local_git_env; cd "$sm_path" && get_default_remote)
 679                         sha1=$(clear_local_git_env; cd "$sm_path" &&
 680                                 git rev-parse --verify "${remote_name}/${branch}") ||
 681                         die "$(eval_gettext "Unable to find current ${remote_name}/${branch} revision in submodule path '\$sm_path'")"
 682                 fi
 683
 684                 if test "$subsha1" != "$sha1" -o -n "$force"
 685                 then
 686                         subforce=$force
 687                         # If we don't already have a -f flag and the submodule has never been checked out
 688                         if test -z "$subsha1" -a -z "$force"
 689                         then
 690                                 subforce="-f"
 691                         fi
 692
 693                         if test -z "$nofetch"
 694                         then
 695                                 # Run fetch only if $sha1 isn't present or it
 696                                 # is not reachable from a ref.
 697                                 (clear_local_git_env; cd "$sm_path" &&
 698                                         ( (rev=$(git rev-list -n 1 $sha1 --not --all 2>/dev/null) &&
 699                                          test -z "$rev") || git-fetch)) ||
 700                                 die "$(eval_gettext "Unable to fetch in submodule path '\$prefix\$sm_path'")"
 701                         fi
 702
 703                         # Is this something we just cloned?
 704                         case ";$cloned_modules;" in
 705                         *";$name;"*)
 706                                 # then there is no local change to integrate
 707                                 update_module= ;;
 708                         esac
 709
 710                         must_die_on_failure=
 711                         case "$update_module" in
 712                         rebase)
 713                                 command="git rebase"
 714                                 die_msg="$(eval_gettext "Unable to rebase '\$sha1' in submodule path '\$prefix\$sm_path'")"
 715                                 say_msg="$(eval_gettext "Submodule path '\$prefix\$sm_path': rebased into '\$sha1'")"
 716                                 must_die_on_failure=yes
 717                                 ;;
 718                         merge)
 719                                 command="git merge"
 720                                 die_msg="$(eval_gettext "Unable to merge '\$sha1' in submodule path '\$prefix\$sm_path'")"
 721                                 say_msg="$(eval_gettext "Submodule path '\$prefix\$sm_path': merged in '\$sha1'")"
 722                                 must_die_on_failure=yes
 723                                 ;;
 724                         *)
 725                                 command="git checkout $subforce -q"
 726                                 die_msg="$(eval_gettext "Unable to checkout '\$sha1' in submodule path '\$prefix\$sm_path'")"
 727                                 say_msg="$(eval_gettext "Submodule path '\$prefix\$sm_path': checked out '\$sha1'")"
 728                                 ;;
 729                         esac
 730
 731                         if (clear_local_git_env; cd "$sm_path" && $command "$sha1")
 732                         then
 733                                 say "$say_msg"
 734                         elif test -n "$must_die_on_failure"
 735                         then
 736                                 die_with_status 2 "$die_msg"
 737                         else
 738                                 err="${err};$die_msg"
 739                                 continue
 740                         fi
 741                 fi
 742
 743                 if test -n "$recursive"
 744                 then
 745                         (
 746                                 prefix="$prefix$sm_path/"
 747                                 clear_local_git_env
 748                                 cd "$sm_path" &&
 749                                 eval cmd_update "$orig_flags"
 750                         )
 751                         res=$?
 752                         if test $res -gt 0
 753                         then
 754                                 die_msg="$(eval_gettext "Failed to recurse into submodule path '\$prefix\$sm_path'")"
 755                                 if test $res -eq 1
 756                                 then
 757                                         err="${err};$die_msg"
 758                                         continue
 759                                 else
 760                                         die_with_status $res "$die_msg"
 761                                 fi
 762                         fi
 763                 fi
 764         done
 765
 766         if test -n "$err"
 767         then
 768                 OIFS=$IFS
 769                 IFS=';'
 770                 for e in $err
 771                 do
 772                         if test -n "$e"
 773                         then
 774                                 echo >&2 "$e"
 775                         fi
 776                 done
 777                 IFS=$OIFS
 778                 exit 1
 779         fi
 780         }
 781 }
 782
 783 set_name_rev () {
 784         revname=$( (
 785                 clear_local_git_env
 786                 cd "$1" && {
 787                         git describe "$2" 2>/dev/null ||
 788                         git describe --tags "$2" 2>/dev/null ||
 789                         git describe --contains "$2" 2>/dev/null ||
 790                         git describe --all --always "$2"
 791                 }
 792         ) )
 793         test -z "$revname" || revname=" ($revname)"
 794 }
 795 #
 796 # Show commit summary for submodules in index or working tree
 797 #
 798 # If '--cached' is given, show summary between index and given commit,
 799 # or between working tree and given commit
 800 #
 801 # $@ = [commit (default 'HEAD'),] requested paths (default all)
 802 #
 803 cmd_summary() {
 804         summary_limit=-1
 805         for_status=
 806         diff_cmd=diff-index
 807
 808         # parse $args after "submodule ... summary".
 809         while test $# -ne 0
 810         do
 811                 case "$1" in
 812                 --cached)
 813                         cached="$1"
 814                         ;;
 815                 --files)
 816                         files="$1"
 817                         ;;
 818                 --for-status)
 819                         for_status="$1"
 820                         ;;
 821                 -n|--summary-limit)
 822                         summary_limit="$2"
 823                         isnumber "$summary_limit" || usage
 824                         shift
 825                         ;;
 826                 --summary-limit=*)
 827                         summary_limit="${1#--summary-limit=}"
 828                         isnumber "$summary_limit" || usage
 829                         ;;
 830                 --)
 831                         shift
 832                         break
 833                         ;;
 834                 -*)
 835                         usage
 836                         ;;
 837                 *)
 838                         break
 839                         ;;
 840                 esac
 841                 shift
 842         done
 843
 844         test $summary_limit = 0 && return
 845
 846         if rev=$(git rev-parse -q --verify --default HEAD ${1+"$1"})
 847         then
 848                 head=$rev
 849                 test $# = 0 || shift
 850         elif test -z "$1" -o "$1" = "HEAD"
 851         then
 852                 # before the first commit: compare with an empty tree
 853                 head=$(git hash-object -w -t tree --stdin </dev/null)
 854                 test -z "$1" || shift
 855         else
 856                 head="HEAD"
 857         fi
 858
 859         if [ -n "$files" ]
 860         then
 861                 test -n "$cached" &&
 862                 die "$(gettext "The --cached option cannot be used with the --files option")"
 863                 diff_cmd=diff-files
 864                 head=
 865         fi
 866
 867         cd_to_toplevel
 868         # Get modified modules cared by user
 869         modules=$(git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- "$@" |
 870                 sane_egrep '^:([0-7]* )?160000' |
 871                 while read mod_src mod_dst sha1_src sha1_dst status name
 872                 do
 873                         # Always show modules deleted or type-changed (blob<->module)
 874                         test $status = D -o $status = T && echo "$name" && continue
 875                         # Also show added or modified modules which are checked out
 876                         GIT_DIR="$name/.git" git-rev-parse --git-dir >/dev/null 2>&1 &&
 877                         echo "$name"
 878                 done
 879         )
 880
 881         test -z "$modules" && return
 882
 883         git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- $modules |
 884         sane_egrep '^:([0-7]* )?160000' |
 885         cut -c2- |
 886         while read mod_src mod_dst sha1_src sha1_dst status name
 887         do
 888                 if test -z "$cached" &&
 889                         test $sha1_dst = 0000000000000000000000000000000000000000
 890                 then
 891                         case "$mod_dst" in
 892                         160000)
 893                                 sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
 894                                 ;;
 895                         100644 | 100755 | 120000)
 896                                 sha1_dst=$(git hash-object $name)
 897                                 ;;
 898                         000000)
 899                                 ;; # removed
 900                         *)
 901                                 # unexpected type
 902                                 eval_gettextln "unexpected mode \$mod_dst" >&2
 903                                 continue ;;
 904                         esac
 905                 fi
 906                 missing_src=
 907                 missing_dst=
 908
 909                 test $mod_src = 160000 &&
 910                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_src^0 >/dev/null &&
 911                 missing_src=t
 912
 913                 test $mod_dst = 160000 &&
 914                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_dst^0 >/dev/null &&
 915                 missing_dst=t
 916
 917                 total_commits=
 918                 case "$missing_src,$missing_dst" in
 919                 t,)
 920                         errmsg="$(eval_gettext "  Warn: \$name doesn't contain commit \$sha1_src")"
 921                         ;;
 922                 ,t)
 923                         errmsg="$(eval_gettext "  Warn: \$name doesn't contain commit \$sha1_dst")"
 924                         ;;
 925                 t,t)
 926                         errmsg="$(eval_gettext "  Warn: \$name doesn't contain commits \$sha1_src and \$sha1_dst")"
 927                         ;;
 928                 *)
 929                         errmsg=
 930                         total_commits=$(
 931                         if test $mod_src = 160000 -a $mod_dst = 160000
 932                         then
 933                                 range="$sha1_src...$sha1_dst"
 934                         elif test $mod_src = 160000
 935                         then
 936                                 range=$sha1_src
 937                         else
 938                                 range=$sha1_dst
 939                         fi
 940                         GIT_DIR="$name/.git" \
 941                         git rev-list --first-parent $range -- | wc -l
 942                         )
 943                         total_commits=" ($(($total_commits + 0)))"
 944                         ;;
 945                 esac
 946
 947                 sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
 948                 sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
 949                 if test $status = T
 950                 then
 951                         blob="$(gettext "blob")"
 952                         submodule="$(gettext "submodule")"
 953                         if test $mod_dst = 160000
 954                         then
 955                                 echo "* $name $sha1_abbr_src($blob)->$sha1_abbr_dst($submodule)$total_commits:"
 956                         else
 957                                 echo "* $name $sha1_abbr_src($submodule)->$sha1_abbr_dst($blob)$total_commits:"
 958                         fi
 959                 else
 960                         echo "* $name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
 961                 fi
 962                 if test -n "$errmsg"
 963                 then
 964                         # Don't give error msg for modification whose dst is not submodule
 965                         # i.e. deleted or changed to blob
 966                         test $mod_dst = 160000 && echo "$errmsg"
 967                 else
 968                         if test $mod_src = 160000 -a $mod_dst = 160000
 969                         then
 970                                 limit=
 971                                 test $summary_limit -gt 0 && limit="-$summary_limit"
 972                                 GIT_DIR="$name/.git" \
 973                                 git log $limit --pretty='format:  %m %s' \
 974                                 --first-parent $sha1_src...$sha1_dst
 975                         elif test $mod_dst = 160000
 976                         then
 977                                 GIT_DIR="$name/.git" \
 978                                 git log --pretty='format:  > %s' -1 $sha1_dst
 979                         else
 980                                 GIT_DIR="$name/.git" \
 981                                 git log --pretty='format:  < %s' -1 $sha1_src
 982                         fi
 983                         echo
 984                 fi
 985                 echo
 986         done |
 987         if test -n "$for_status"; then
 988                 if [ -n "$files" ]; then
 989                         gettextln "Submodules changed but not updated:" | git stripspace -c
 990                 else
 991                         gettextln "Submodule changes to be committed:" | git stripspace -c
 992                 fi
 993                 printf "\n" | git stripspace -c
 994                 git stripspace -c
 995         else
 996                 cat
 997         fi
 998 }
 999 #
1000 # List all submodules, prefixed with:
1001 #  - submodule not initialized
1002 #  + different revision checked out
1003 #
1004 # If --cached was specified the revision in the index will be printed
1005 # instead of the currently checked out revision.
1006 #
1007 # $@ = requested paths (default to all)
1008 #
1009 cmd_status()
1010 {
1011         # parse $args after "submodule ... status".
1012         while test $# -ne 0
1013         do
1014                 case "$1" in
1015                 -q|--quiet)
1016                         GIT_QUIET=1
1017                         ;;
1018                 --cached)
1019                         cached=1
1020                         ;;
1021                 --recursive)
1022                         recursive=1
1023                         ;;
1024                 --)
1025                         shift
1026                         break
1027                         ;;
1028                 -*)
1029                         usage
1030                         ;;
1031                 *)
1032                         break
1033                         ;;
1034                 esac
1035                 shift
1036         done
1037
1038         module_list "$@" |
1039         while read mode sha1 stage sm_path
1040         do
1041                 die_if_unmatched "$mode"
1042                 name=$(module_name "$sm_path") || exit
1043                 url=$(git config submodule."$name".url)
1044                 displaypath="$prefix$sm_path"
1045                 if test "$stage" = U
1046                 then
1047                         say "U$sha1 $displaypath"
1048                         continue
1049                 fi
1050                 if test -z "$url" || ! test -d "$sm_path"/.git -o -f "$sm_path"/.git
1051                 then
1052                         say "-$sha1 $displaypath"
1053                         continue;
1054                 fi
1055                 set_name_rev "$sm_path" "$sha1"
1056                 if git diff-files --ignore-submodules=dirty --quiet -- "$sm_path"
1057                 then
1058                         say " $sha1 $displaypath$revname"
1059                 else
1060                         if test -z "$cached"
1061                         then
1062                                 sha1=$(clear_local_git_env; cd "$sm_path" && git rev-parse --verify HEAD)
1063                                 set_name_rev "$sm_path" "$sha1"
1064                         fi
1065                         say "+$sha1 $displaypath$revname"
1066                 fi
1067
1068                 if test -n "$recursive"
1069                 then
1070                         (
1071                                 prefix="$displaypath/"
1072                                 clear_local_git_env
1073                                 cd "$sm_path" &&
1074                                 eval cmd_status
1075                         ) ||
1076                         die "$(eval_gettext "Failed to recurse into submodule path '\$sm_path'")"
1077                 fi
1078         done
1079 }
1080 #
1081 # Sync remote urls for submodules
1082 # This makes the value for remote.$remote.url match the value
1083 # specified in .gitmodules.
1084 #
1085 cmd_sync()
1086 {
1087         while test $# -ne 0
1088         do
1089                 case "$1" in
1090                 -q|--quiet)
1091                         GIT_QUIET=1
1092                         shift
1093                         ;;
1094                 --recursive)
1095                         recursive=1
1096                         shift
1097                         ;;
1098                 --)
1099                         shift
1100                         break
1101                         ;;
1102                 -*)
1103                         usage
1104                         ;;
1105                 *)
1106                         break
1107                         ;;
1108                 esac
1109         done
1110         cd_to_toplevel
1111         module_list "$@" |
1112         while read mode sha1 stage sm_path
1113         do
1114                 die_if_unmatched "$mode"
1115                 name=$(module_name "$sm_path")
1116                 url=$(git config -f .gitmodules --get submodule."$name".url)
1117
1118                 # Possibly a url relative to parent
1119                 case "$url" in
1120                 ./*|../*)
1121                         # rewrite foo/bar as ../.. to find path from
1122                         # submodule work tree to superproject work tree
1123                         up_path="$(echo "$sm_path" | sed "s/[^/][^/]*/../g")" &&
1124                         # guarantee a trailing /
1125                         up_path=${up_path%/}/ &&
1126                         # path from submodule work tree to submodule origin repo
1127                         sub_origin_url=$(resolve_relative_url "$url" "$up_path") &&
1128                         # path from superproject work tree to submodule origin repo
1129                         super_config_url=$(resolve_relative_url "$url") || exit
1130                         ;;
1131                 *)
1132                         sub_origin_url="$url"
1133                         super_config_url="$url"
1134                         ;;
1135                 esac
1136
1137                 if git config "submodule.$name.url" >/dev/null 2>/dev/null
1138                 then
1139                         say "$(eval_gettext "Synchronizing submodule url for '\$prefix\$sm_path'")"
1140                         git config submodule."$name".url "$super_config_url"
1141
1142                         if test -e "$sm_path"/.git
1143                         then
1144                         (
1145                                 clear_local_git_env
1146                                 cd "$sm_path"
1147                                 remote=$(get_default_remote)
1148                                 git config remote."$remote".url "$sub_origin_url"
1149
1150                                 if test -n "$recursive"
1151                                 then
1152                                         prefix="$prefix$sm_path/"
1153                                         eval cmd_sync
1154                                 fi
1155                         )
1156                         fi
1157                 fi
1158         done
1159 }
1160
1161 # This loop parses the command line arguments to find the
1162 # subcommand name to dispatch.  Parsing of the subcommand specific
1163 # options are primarily done by the subcommand implementations.
1164 # Subcommand specific options such as --branch and --cached are
1165 # parsed here as well, for backward compatibility.
1166
1167 while test $# != 0 && test -z "$command"
1168 do
1169         case "$1" in
1170         add | foreach | init | update | status | summary | sync)
1171                 command=$1
1172                 ;;
1173         -q|--quiet)
1174                 GIT_QUIET=1
1175                 ;;
1176         -b|--branch)
1177                 case "$2" in
1178                 '')
1179                         usage
1180                         ;;
1181                 esac
1182                 branch="$2"; shift
1183                 ;;
1184         --cached)
1185                 cached="$1"
1186                 ;;
1187         --)
1188                 break
1189                 ;;
1190         -*)
1191                 usage
1192                 ;;
1193         *)
1194                 break
1195                 ;;
1196         esac
1197         shift
1198 done
1199
1200 # No command word defaults to "status"
1201 if test -z "$command"
1202 then
1203     if test $# = 0
1204     then
1205         command=status
1206     else
1207         usage
1208     fi
1209 fi
1210
1211 # "-b branch" is accepted only by "add"
1212 if test -n "$branch" && test "$command" != add
1213 then
1214         usage
1215 fi
1216
1217 # "--cached" is accepted only by "status" and "summary"
1218 if test -n "$cached" && test "$command" != status -a "$command" != summary
1219 then
1220         usage
1221 fi
1222
1223 "cmd_$command" "$@"