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