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."$name".url)
 464                 update_module=$(git config submodule."$name".update)
 465                 if test -z "$url"
 466                 then
 467                         # Only mention uninitialized submodules when its
 468                         # path have been specified
 469                         test "$#" != "0" &&
 470                         say "$(eval_gettext "Submodule path '\$path' not initialized
 471 Maybe you want to use 'update --init'?")"
 472                         continue
 473                 fi
 474
 475                 if ! test -d "$path"/.git -o -f "$path"/.git
 476                 then
 477                         module_clone "$path" "$url" "$reference"|| exit
 478                         cloned_modules="$cloned_modules;$name"
 479                         subsha1=
 480                 else
 481                         subsha1=$(clear_local_git_env; cd "$path" &&
 482                                 git rev-parse --verify HEAD) ||
 483                         die "$(eval_gettext "Unable to find current revision in submodule path '\$path'")"
 484                 fi
 485
 486                 if ! test -z "$update"
 487                 then
 488                         update_module=$update
 489                 fi
 490
 491                 if test "$subsha1" != "$sha1"
 492                 then
 493                         subforce=$force
 494                         # If we don't already have a -f flag and the submodule has never been checked out
 495                         if test -z "$subsha1" -a -z "$force"
 496                         then
 497                                 subforce="-f"
 498                         fi
 499
 500                         if test -z "$nofetch"
 501                         then
 502                                 # Run fetch only if $sha1 isn't present or it
 503                                 # is not reachable from a ref.
 504                                 (clear_local_git_env; cd "$path" &&
 505                                         ( (rev=$(git rev-list -n 1 $sha1 --not --all 2>/dev/null) &&
 506                                          test -z "$rev") || git-fetch)) ||
 507                                 die "$(eval_gettext "Unable to fetch in submodule path '\$path'")"
 508                         fi
 509
 510                         # Is this something we just cloned?
 511                         case ";$cloned_modules;" in
 512                         *";$name;"*)
 513                                 # then there is no local change to integrate
 514                                 update_module= ;;
 515                         esac
 516
 517                         must_die_on_failure=
 518                         case "$update_module" in
 519                         rebase)
 520                                 command="git rebase"
 521                                 die_msg="$(eval_gettext "Unable to rebase '\$sha1' in submodule path '\$path'")"
 522                                 say_msg="$(eval_gettext "Submodule path '\$path': rebased into '\$sha1'")"
 523                                 must_die_on_failure=yes
 524                                 ;;
 525                         merge)
 526                                 command="git merge"
 527                                 die_msg="$(eval_gettext "Unable to merge '\$sha1' in submodule path '\$path'")"
 528                                 say_msg="$(eval_gettext "Submodule path '\$path': merged in '\$sha1'")"
 529                                 must_die_on_failure=yes
 530                                 ;;
 531                         *)
 532                                 command="git checkout $subforce -q"
 533                                 die_msg="$(eval_gettext "Unable to checkout '\$sha1' in submodule path '\$path'")"
 534                                 say_msg="$(eval_gettext "Submodule path '\$path': checked out '\$sha1'")"
 535                                 ;;
 536                         esac
 537
 538                         if (clear_local_git_env; cd "$path" && $command "$sha1")
 539                         then
 540                                 say "$say_msg"
 541                         elif test -n "$must_die_on_failure"
 542                         then
 543                                 die_with_status 2 "$die_msg"
 544                         else
 545                                 err="${err};$die_msg"
 546                                 continue
 547                         fi
 548                 fi
 549
 550                 if test -n "$recursive"
 551                 then
 552                         (clear_local_git_env; cd "$path" && eval cmd_update "$orig_flags")
 553                         res=$?
 554                         if test $res -gt 0
 555                         then
 556                                 die_msg="$(eval_gettext "Failed to recurse into submodule path '\$path'")"
 557                                 if test $res -eq 1
 558                                 then
 559                                         err="${err};$die_msg"
 560                                         continue
 561                                 else
 562                                         die_with_status $res "$die_msg"
 563                                 fi
 564                         fi
 565                 fi
 566         done
 567
 568         if test -n "$err"
 569         then
 570                 OIFS=$IFS
 571                 IFS=';'
 572                 for e in $err
 573                 do
 574                         if test -n "$e"
 575                         then
 576                                 echo >&2 "$e"
 577                         fi
 578                 done
 579                 IFS=$OIFS
 580                 exit 1
 581         fi
 582         }
 583 }
 584
 585 set_name_rev () {
 586         revname=$( (
 587                 clear_local_git_env
 588                 cd "$1" && {
 589                         git describe "$2" 2>/dev/null ||
 590                         git describe --tags "$2" 2>/dev/null ||
 591                         git describe --contains "$2" 2>/dev/null ||
 592                         git describe --all --always "$2"
 593                 }
 594         ) )
 595         test -z "$revname" || revname=" ($revname)"
 596 }
 597 #
 598 # Show commit summary for submodules in index or working tree
 599 #
 600 # If '--cached' is given, show summary between index and given commit,
 601 # or between working tree and given commit
 602 #
 603 # $@ = [commit (default 'HEAD'),] requested paths (default all)
 604 #
 605 cmd_summary() {
 606         summary_limit=-1
 607         for_status=
 608         diff_cmd=diff-index
 609
 610         # parse $args after "submodule ... summary".
 611         while test $# -ne 0
 612         do
 613                 case "$1" in
 614                 --cached)
 615                         cached="$1"
 616                         ;;
 617                 --files)
 618                         files="$1"
 619                         ;;
 620                 --for-status)
 621                         for_status="$1"
 622                         ;;
 623                 -n|--summary-limit)
 624                         if summary_limit=$(($2 + 0)) 2>/dev/null && test "$summary_limit" = "$2"
 625                         then
 626                                 :
 627                         else
 628                                 usage
 629                         fi
 630                         shift
 631                         ;;
 632                 --)
 633                         shift
 634                         break
 635                         ;;
 636                 -*)
 637                         usage
 638                         ;;
 639                 *)
 640                         break
 641                         ;;
 642                 esac
 643                 shift
 644         done
 645
 646         test $summary_limit = 0 && return
 647
 648         if rev=$(git rev-parse -q --verify --default HEAD ${1+"$1"})
 649         then
 650                 head=$rev
 651                 test $# = 0 || shift
 652         elif test -z "$1" -o "$1" = "HEAD"
 653         then
 654                 # before the first commit: compare with an empty tree
 655                 head=$(git hash-object -w -t tree --stdin </dev/null)
 656                 test -z "$1" || shift
 657         else
 658                 head="HEAD"
 659         fi
 660
 661         if [ -n "$files" ]
 662         then
 663                 test -n "$cached" &&
 664                 die "$(gettext -- "--cached cannot be used with --files")"
 665                 diff_cmd=diff-files
 666                 head=
 667         fi
 668
 669         cd_to_toplevel
 670         # Get modified modules cared by user
 671         modules=$(git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- "$@" |
 672                 sane_egrep '^:([0-7]* )?160000' |
 673                 while read mod_src mod_dst sha1_src sha1_dst status name
 674                 do
 675                         # Always show modules deleted or type-changed (blob<->module)
 676                         test $status = D -o $status = T && echo "$name" && continue
 677                         # Also show added or modified modules which are checked out
 678                         GIT_DIR="$name/.git" git-rev-parse --git-dir >/dev/null 2>&1 &&
 679                         echo "$name"
 680                 done
 681         )
 682
 683         test -z "$modules" && return
 684
 685         git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- $modules |
 686         sane_egrep '^:([0-7]* )?160000' |
 687         cut -c2- |
 688         while read mod_src mod_dst sha1_src sha1_dst status name
 689         do
 690                 if test -z "$cached" &&
 691                         test $sha1_dst = 0000000000000000000000000000000000000000
 692                 then
 693                         case "$mod_dst" in
 694                         160000)
 695                                 sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
 696                                 ;;
 697                         100644 | 100755 | 120000)
 698                                 sha1_dst=$(git hash-object $name)
 699                                 ;;
 700                         000000)
 701                                 ;; # removed
 702                         *)
 703                                 # unexpected type
 704                                 (
 705                                         eval_gettext "unexpected mode \$mod_dst" &&
 706                                         echo
 707                                 ) >&2
 708                                 continue ;;
 709                         esac
 710                 fi
 711                 missing_src=
 712                 missing_dst=
 713
 714                 test $mod_src = 160000 &&
 715                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_src^0 >/dev/null &&
 716                 missing_src=t
 717
 718                 test $mod_dst = 160000 &&
 719                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_dst^0 >/dev/null &&
 720                 missing_dst=t
 721
 722                 total_commits=
 723                 case "$missing_src,$missing_dst" in
 724                 t,)
 725                         errmsg="$(eval_gettext "  Warn: \$name doesn't contain commit \$sha1_src")"
 726                         ;;
 727                 ,t)
 728                         errmsg="$(eval_gettext "  Warn: \$name doesn't contain commit \$sha1_dst")"
 729                         ;;
 730                 t,t)
 731                         errmsg="$(eval_gettext "  Warn: \$name doesn't contain commits \$sha1_src and \$sha1_dst")"
 732                         ;;
 733                 *)
 734                         errmsg=
 735                         total_commits=$(
 736                         if test $mod_src = 160000 -a $mod_dst = 160000
 737                         then
 738                                 range="$sha1_src...$sha1_dst"
 739                         elif test $mod_src = 160000
 740                         then
 741                                 range=$sha1_src
 742                         else
 743                                 range=$sha1_dst
 744                         fi
 745                         GIT_DIR="$name/.git" \
 746                         git rev-list --first-parent $range -- | wc -l
 747                         )
 748                         total_commits=" ($(($total_commits + 0)))"
 749                         ;;
 750                 esac
 751
 752                 sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
 753                 sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
 754                 if test $status = T
 755                 then
 756                         blob="$(gettext "blob")"
 757                         submodule="$(gettext "submodule")"
 758                         if test $mod_dst = 160000
 759                         then
 760                                 echo "* $name $sha1_abbr_src($blob)->$sha1_abbr_dst($submodule)$total_commits:"
 761                         else
 762                                 echo "* $name $sha1_abbr_src($submodule)->$sha1_abbr_dst($blob)$total_commits:"
 763                         fi
 764                 else
 765                         echo "* $name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
 766                 fi
 767                 if test -n "$errmsg"
 768                 then
 769                         # Don't give error msg for modification whose dst is not submodule
 770                         # i.e. deleted or changed to blob
 771                         test $mod_dst = 160000 && echo "$errmsg"
 772                 else
 773                         if test $mod_src = 160000 -a $mod_dst = 160000
 774                         then
 775                                 limit=
 776                                 test $summary_limit -gt 0 && limit="-$summary_limit"
 777                                 GIT_DIR="$name/.git" \
 778                                 git log $limit --pretty='format:  %m %s' \
 779                                 --first-parent $sha1_src...$sha1_dst
 780                         elif test $mod_dst = 160000
 781                         then
 782                                 GIT_DIR="$name/.git" \
 783                                 git log --pretty='format:  > %s' -1 $sha1_dst
 784                         else
 785                                 GIT_DIR="$name/.git" \
 786                                 git log --pretty='format:  < %s' -1 $sha1_src
 787                         fi
 788                         echo
 789                 fi
 790                 echo
 791         done |
 792         if test -n "$for_status"; then
 793                 if [ -n "$files" ]; then
 794                         gettext "# Submodules changed but not updated:"; echo
 795                 else
 796                         gettext "# Submodule changes to be committed:"; echo
 797                 fi
 798                 echo "#"
 799                 sed -e 's|^|# |' -e 's|^# $|#|'
 800         else
 801                 cat
 802         fi
 803 }
 804 #
 805 # List all submodules, prefixed with:
 806 #  - submodule not initialized
 807 #  + different revision checked out
 808 #
 809 # If --cached was specified the revision in the index will be printed
 810 # instead of the currently checked out revision.
 811 #
 812 # $@ = requested paths (default to all)
 813 #
 814 cmd_status()
 815 {
 816         # parse $args after "submodule ... status".
 817         orig_flags=
 818         while test $# -ne 0
 819         do
 820                 case "$1" in
 821                 -q|--quiet)
 822                         GIT_QUIET=1
 823                         ;;
 824                 --cached)
 825                         cached=1
 826                         ;;
 827                 --recursive)
 828                         recursive=1
 829                         ;;
 830                 --)
 831                         shift
 832                         break
 833                         ;;
 834                 -*)
 835                         usage
 836                         ;;
 837                 *)
 838                         break
 839                         ;;
 840                 esac
 841                 orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 842                 shift
 843         done
 844
 845         module_list "$@" |
 846         while read mode sha1 stage path
 847         do
 848                 name=$(module_name "$path") || exit
 849                 url=$(git config submodule."$name".url)
 850                 displaypath="$prefix$path"
 851                 if test "$stage" = U
 852                 then
 853                         say "U$sha1 $displaypath"
 854                         continue
 855                 fi
 856                 if test -z "$url" || ! test -d "$path"/.git -o -f "$path"/.git
 857                 then
 858                         say "-$sha1 $displaypath"
 859                         continue;
 860                 fi
 861                 set_name_rev "$path" "$sha1"
 862                 if git diff-files --ignore-submodules=dirty --quiet -- "$path"
 863                 then
 864                         say " $sha1 $displaypath$revname"
 865                 else
 866                         if test -z "$cached"
 867                         then
 868                                 sha1=$(clear_local_git_env; cd "$path" && git rev-parse --verify HEAD)
 869                                 set_name_rev "$path" "$sha1"
 870                         fi
 871                         say "+$sha1 $displaypath$revname"
 872                 fi
 873
 874                 if test -n "$recursive"
 875                 then
 876                         (
 877                                 prefix="$displaypath/"
 878                                 clear_local_git_env
 879                                 cd "$path" &&
 880                                 eval cmd_status "$orig_args"
 881                         ) ||
 882                         die "$(eval_gettext "Failed to recurse into submodule path '\$path'")"
 883                 fi
 884         done
 885 }
 886 #
 887 # Sync remote urls for submodules
 888 # This makes the value for remote.$remote.url match the value
 889 # specified in .gitmodules.
 890 #
 891 cmd_sync()
 892 {
 893         while test $# -ne 0
 894         do
 895                 case "$1" in
 896                 -q|--quiet)
 897                         GIT_QUIET=1
 898                         shift
 899                         ;;
 900                 --)
 901                         shift
 902                         break
 903                         ;;
 904                 -*)
 905                         usage
 906                         ;;
 907                 *)
 908                         break
 909                         ;;
 910                 esac
 911         done
 912         cd_to_toplevel
 913         module_list "$@" |
 914         while read mode sha1 stage path
 915         do
 916                 name=$(module_name "$path")
 917                 url=$(git config -f .gitmodules --get submodule."$name".url)
 918
 919                 # Possibly a url relative to parent
 920                 case "$url" in
 921                 ./*|../*)
 922                         url=$(resolve_relative_url "$url") || exit
 923                         ;;
 924                 esac
 925
 926                 if git config "submodule.$name.url" >/dev/null 2>/dev/null
 927                 then
 928                         say "$(eval_gettext "Synchronizing submodule url for '\$name'")"
 929                         git config submodule."$name".url "$url"
 930
 931                         if test -e "$path"/.git
 932                         then
 933                         (
 934                                 clear_local_git_env
 935                                 cd "$path"
 936                                 remote=$(get_default_remote)
 937                                 git config remote."$remote".url "$url"
 938                         )
 939                         fi
 940                 fi
 941         done
 942 }
 943
 944 # This loop parses the command line arguments to find the
 945 # subcommand name to dispatch.  Parsing of the subcommand specific
 946 # options are primarily done by the subcommand implementations.
 947 # Subcommand specific options such as --branch and --cached are
 948 # parsed here as well, for backward compatibility.
 949
 950 while test $# != 0 && test -z "$command"
 951 do
 952         case "$1" in
 953         add | foreach | init | update | status | summary | sync)
 954                 command=$1
 955                 ;;
 956         -q|--quiet)
 957                 GIT_QUIET=1
 958                 ;;
 959         -b|--branch)
 960                 case "$2" in
 961                 '')
 962                         usage
 963                         ;;
 964                 esac
 965                 branch="$2"; shift
 966                 ;;
 967         --cached)
 968                 cached="$1"
 969                 ;;
 970         --)
 971                 break
 972                 ;;
 973         -*)
 974                 usage
 975                 ;;
 976         *)
 977                 break
 978                 ;;
 979         esac
 980         shift
 981 done
 982
 983 # No command word defaults to "status"
 984 test -n "$command" || command=status
 985
 986 # "-b branch" is accepted only by "add"
 987 if test -n "$branch" && test "$command" != add
 988 then
 989         usage
 990 fi
 991
 992 # "--cached" is accepted only by "status" and "summary"
 993 if test -n "$cached" && test "$command" != status -a "$command" != summary
 994 then
 995         usage
 996 fi
 997
 998 "cmd_$command" "$@"