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