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