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