git-submodule.sh

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