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                 cat >&2 <<EOF
 232 The following path is ignored by one of your .gitignore files:
 233 $(gettext $path)
 234 Use -f if you really want to add it.
 235 EOF
 236                 exit 1
 237         fi
 238
 239         # perhaps the path exists and is already a git repo, else clone it
 240         if test -e "$path"
 241         then
 242                 if test -d "$path"/.git -o -f "$path"/.git
 243                 then
 244                         eval_gettext "Adding existing repo at '\$path' to the index"; echo
 245                 else
 246                         die "$(eval_gettext "'\$path' already exists and is not a valid git repo")"
 247                 fi
 248
 249         else
 250
 251                 module_clone "$path" "$realrepo" "$reference" || exit
 252                 (
 253                         clear_local_git_env
 254                         cd "$path" &&
 255                         # ash fails to wordsplit ${branch:+-b "$branch"...}
 256                         case "$branch" in
 257                         '') git checkout -f -q ;;
 258                         ?*) git checkout -f -q -B "$branch" "origin/$branch" ;;
 259                         esac
 260                 ) || die "$(eval_gettext "Unable to checkout submodule '\$path'")"
 261         fi
 262         git config submodule."$path".url "$realrepo"
 263
 264         git add $force "$path" ||
 265         die "$(eval_gettext "Failed to add submodule '\$path'")"
 266
 267         git config -f .gitmodules submodule."$path".path "$path" &&
 268         git config -f .gitmodules submodule."$path".url "$repo" &&
 269         git add --force .gitmodules ||
 270         die "$(eval_gettext "Failed to register submodule '\$path'")"
 271 }
 272
 273 #
 274 # Execute an arbitrary command sequence in each checked out
 275 # submodule
 276 #
 277 # $@ = command to execute
 278 #
 279 cmd_foreach()
 280 {
 281         # parse $args after "submodule ... foreach".
 282         while test $# -ne 0
 283         do
 284                 case "$1" in
 285                 -q|--quiet)
 286                         GIT_QUIET=1
 287                         ;;
 288                 --recursive)
 289                         recursive=1
 290                         ;;
 291                 -*)
 292                         usage
 293                         ;;
 294                 *)
 295                         break
 296                         ;;
 297                 esac
 298                 shift
 299         done
 300
 301         toplevel=$(pwd)
 302
 303         # dup stdin so that it can be restored when running the external
 304         # command in the subshell (and a recursive call to this function)
 305         exec 3<&0
 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                         ) <&3 3<&- ||
 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                 if test -z "$(git config "submodule.$name.url")"
 363                 then
 364                         url=$(git config -f .gitmodules submodule."$name".url)
 365                         test -z "$url" &&
 366                         die "$(eval_gettext "No url found for submodule path '\$path' in .gitmodules")"
 367
 368                         # Possibly a url relative to parent
 369                         case "$url" in
 370                         ./*|../*)
 371                                 url=$(resolve_relative_url "$url") || exit
 372                                 ;;
 373                         esac
 374                         git config submodule."$name".url "$url" ||
 375                         die "$(eval_gettext "Failed to register url for submodule path '\$path'")"
 376                 fi
 377
 378                 # Copy "update" setting when it is not set yet
 379                 upd="$(git config -f .gitmodules submodule."$name".update)"
 380                 test -z "$upd" ||
 381                 test -n "$(git config submodule."$name".update)" ||
 382                 git config submodule."$name".update "$upd" ||
 383                 die "$(eval_gettext "Failed to register update mode for submodule path '\$path'")"
 384
 385                 say "$(eval_gettext "Submodule '\$name' (\$url) registered for path '\$path'")"
 386         done
 387 }
 388
 389 #
 390 # Update each submodule path to correct revision, using clone and checkout as needed
 391 #
 392 # $@ = requested paths (default to all)
 393 #
 394 cmd_update()
 395 {
 396         # parse $args after "submodule ... update".
 397         orig_flags=
 398         while test $# -ne 0
 399         do
 400                 case "$1" in
 401                 -q|--quiet)
 402                         GIT_QUIET=1
 403                         ;;
 404                 -i|--init)
 405                         init=1
 406                         ;;
 407                 -N|--no-fetch)
 408                         nofetch=1
 409                         ;;
 410                 -f|--force)
 411                         force=$1
 412                         ;;
 413                 -r|--rebase)
 414                         update="rebase"
 415                         ;;
 416                 --reference)
 417                         case "$2" in '') usage ;; esac
 418                         reference="--reference=$2"
 419                         orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 420                         shift
 421                         ;;
 422                 --reference=*)
 423                         reference="$1"
 424                         ;;
 425                 -m|--merge)
 426                         update="merge"
 427                         ;;
 428                 --recursive)
 429                         recursive=1
 430                         ;;
 431                 --)
 432                         shift
 433                         break
 434                         ;;
 435                 -*)
 436                         usage
 437                         ;;
 438                 *)
 439                         break
 440                         ;;
 441                 esac
 442                 orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 443                 shift
 444         done
 445
 446         if test -n "$init"
 447         then
 448                 cmd_init "--" "$@" || return
 449         fi
 450
 451         cloned_modules=
 452         module_list "$@" | {
 453         err=
 454         while read mode sha1 stage path
 455         do
 456                 if test "$stage" = U
 457                 then
 458                         echo >&2 "Skipping unmerged submodule $path"
 459                         continue
 460                 fi
 461                 name=$(module_name "$path") || exit
 462                 url=$(git config submodule."$name".url)
 463                 update_module=$(git config submodule."$name".update)
 464                 if test -z "$url"
 465                 then
 466                         # Only mention uninitialized submodules when its
 467                         # path have been specified
 468                         test "$#" != "0" &&
 469                         say "$(eval_gettext "Submodule path '\$path' not initialized
 470 Maybe you want to use 'update --init'?")"
 471                         continue
 472                 fi
 473
 474                 if ! test -d "$path"/.git -o -f "$path"/.git
 475                 then
 476                         module_clone "$path" "$url" "$reference"|| exit
 477                         cloned_modules="$cloned_modules;$name"
 478                         subsha1=
 479                 else
 480                         subsha1=$(clear_local_git_env; cd "$path" &&
 481                                 git rev-parse --verify HEAD) ||
 482                         die "$(eval_gettext "Unable to find current revision in submodule path '\$path'")"
 483                 fi
 484
 485                 if ! test -z "$update"
 486                 then
 487                         update_module=$update
 488                 fi
 489
 490                 if test "$subsha1" != "$sha1"
 491                 then
 492                         subforce=$force
 493                         # If we don't already have a -f flag and the submodule has never been checked out
 494                         if test -z "$subsha1" -a -z "$force"
 495                         then
 496                                 subforce="-f"
 497                         fi
 498
 499                         if test -z "$nofetch"
 500                         then
 501                                 # Run fetch only if $sha1 isn't present or it
 502                                 # is not reachable from a ref.
 503                                 (clear_local_git_env; cd "$path" &&
 504                                         ( (rev=$(git rev-list -n 1 $sha1 --not --all 2>/dev/null) &&
 505                                          test -z "$rev") || git-fetch)) ||
 506                                 die "$(eval_gettext "Unable to fetch in submodule path '\$path'")"
 507                         fi
 508
 509                         # Is this something we just cloned?
 510                         case ";$cloned_modules;" in
 511                         *";$name;"*)
 512                                 # then there is no local change to integrate
 513                                 update_module= ;;
 514                         esac
 515
 516                         must_die_on_failure=
 517                         case "$update_module" in
 518                         rebase)
 519                                 command="git rebase"
 520                                 die_msg="$(eval_gettext "Unable to rebase '\$sha1' in submodule path '\$path'")"
 521                                 say_msg="$(eval_gettext "Submodule path '\$path': rebased into '\$sha1'")"
 522                                 must_die_on_failure=yes
 523                                 ;;
 524                         merge)
 525                                 command="git merge"
 526                                 die_msg="$(eval_gettext "Unable to merge '\$sha1' in submodule path '\$path'")"
 527                                 say_msg="$(eval_gettext "Submodule path '\$path': merged in '\$sha1'")"
 528                                 must_die_on_failure=yes
 529                                 ;;
 530                         *)
 531                                 command="git checkout $subforce -q"
 532                                 die_msg="$(eval_gettext "Unable to checkout '\$sha1' in submodule path '\$path'")"
 533                                 say_msg="$(eval_gettext "Submodule path '\$path': checked out '\$sha1'")"
 534                                 ;;
 535                         esac
 536
 537                         if (clear_local_git_env; cd "$path" && $command "$sha1")
 538                         then
 539                                 say "$say_msg"
 540                         elif test -n "$must_die_on_failure"
 541                         then
 542                                 die_with_status 2 "$die_msg"
 543                         else
 544                                 err="${err};$die_msg"
 545                                 continue
 546                         fi
 547                 fi
 548
 549                 if test -n "$recursive"
 550                 then
 551                         (clear_local_git_env; cd "$path" && eval cmd_update "$orig_flags")
 552                         res=$?
 553                         if test $res -gt 0
 554                         then
 555                                 die_msg="$(eval_gettext "Failed to recurse into submodule path '\$path'")"
 556                                 if test $res -eq 1
 557                                 then
 558                                         err="${err};$die_msg"
 559                                         continue
 560                                 else
 561                                         die_with_status $res "$die_msg"
 562                                 fi
 563                         fi
 564                 fi
 565         done
 566
 567         if test -n "$err"
 568         then
 569                 OIFS=$IFS
 570                 IFS=';'
 571                 for e in $err
 572                 do
 573                         if test -n "$e"
 574                         then
 575                                 echo >&2 "$e"
 576                         fi
 577                 done
 578                 IFS=$OIFS
 579                 exit 1
 580         fi
 581         }
 582 }
 583
 584 set_name_rev () {
 585         revname=$( (
 586                 clear_local_git_env
 587                 cd "$1" && {
 588                         git describe "$2" 2>/dev/null ||
 589                         git describe --tags "$2" 2>/dev/null ||
 590                         git describe --contains "$2" 2>/dev/null ||
 591                         git describe --all --always "$2"
 592                 }
 593         ) )
 594         test -z "$revname" || revname=" ($revname)"
 595 }
 596 #
 597 # Show commit summary for submodules in index or working tree
 598 #
 599 # If '--cached' is given, show summary between index and given commit,
 600 # or between working tree and given commit
 601 #
 602 # $@ = [commit (default 'HEAD'),] requested paths (default all)
 603 #
 604 cmd_summary() {
 605         summary_limit=-1
 606         for_status=
 607         diff_cmd=diff-index
 608
 609         # parse $args after "submodule ... summary".
 610         while test $# -ne 0
 611         do
 612                 case "$1" in
 613                 --cached)
 614                         cached="$1"
 615                         ;;
 616                 --files)
 617                         files="$1"
 618                         ;;
 619                 --for-status)
 620                         for_status="$1"
 621                         ;;
 622                 -n|--summary-limit)
 623                         if summary_limit=$(($2 + 0)) 2>/dev/null && test "$summary_limit" = "$2"
 624                         then
 625                                 :
 626                         else
 627                                 usage
 628                         fi
 629                         shift
 630                         ;;
 631                 --)
 632                         shift
 633                         break
 634                         ;;
 635                 -*)
 636                         usage
 637                         ;;
 638                 *)
 639                         break
 640                         ;;
 641                 esac
 642                 shift
 643         done
 644
 645         test $summary_limit = 0 && return
 646
 647         if rev=$(git rev-parse -q --verify --default HEAD ${1+"$1"})
 648         then
 649                 head=$rev
 650                 test $# = 0 || shift
 651         elif test -z "$1" -o "$1" = "HEAD"
 652         then
 653                 # before the first commit: compare with an empty tree
 654                 head=$(git hash-object -w -t tree --stdin </dev/null)
 655                 test -z "$1" || shift
 656         else
 657                 head="HEAD"
 658         fi
 659
 660         if [ -n "$files" ]
 661         then
 662                 test -n "$cached" &&
 663                 die "$(gettext -- "--cached cannot be used with --files")"
 664                 diff_cmd=diff-files
 665                 head=
 666         fi
 667
 668         cd_to_toplevel
 669         # Get modified modules cared by user
 670         modules=$(git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- "$@" |
 671                 sane_egrep '^:([0-7]* )?160000' |
 672                 while read mod_src mod_dst sha1_src sha1_dst status name
 673                 do
 674                         # Always show modules deleted or type-changed (blob<->module)
 675                         test $status = D -o $status = T && echo "$name" && continue
 676                         # Also show added or modified modules which are checked out
 677                         GIT_DIR="$name/.git" git-rev-parse --git-dir >/dev/null 2>&1 &&
 678                         echo "$name"
 679                 done
 680         )
 681
 682         test -z "$modules" && return
 683
 684         git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- $modules |
 685         sane_egrep '^:([0-7]* )?160000' |
 686         cut -c2- |
 687         while read mod_src mod_dst sha1_src sha1_dst status name
 688         do
 689                 if test -z "$cached" &&
 690                         test $sha1_dst = 0000000000000000000000000000000000000000
 691                 then
 692                         case "$mod_dst" in
 693                         160000)
 694                                 sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
 695                                 ;;
 696                         100644 | 100755 | 120000)
 697                                 sha1_dst=$(git hash-object $name)
 698                                 ;;
 699                         000000)
 700                                 ;; # removed
 701                         *)
 702                                 # unexpected type
 703                                 (
 704                                         eval_gettext "unexpected mode \$mod_dst" &&
 705                                         echo
 706                                 ) >&2
 707                                 continue ;;
 708                         esac
 709                 fi
 710                 missing_src=
 711                 missing_dst=
 712
 713                 test $mod_src = 160000 &&
 714                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_src^0 >/dev/null &&
 715                 missing_src=t
 716
 717                 test $mod_dst = 160000 &&
 718                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_dst^0 >/dev/null &&
 719                 missing_dst=t
 720
 721                 total_commits=
 722                 case "$missing_src,$missing_dst" in
 723                 t,)
 724                         errmsg="$(eval_gettext "  Warn: \$name doesn't contain commit \$sha1_src")"
 725                         ;;
 726                 ,t)
 727                         errmsg="$(eval_gettext "  Warn: \$name doesn't contain commit \$sha1_dst")"
 728                         ;;
 729                 t,t)
 730                         errmsg="$(eval_gettext "  Warn: \$name doesn't contain commits \$sha1_src and \$sha1_dst")"
 731                         ;;
 732                 *)
 733                         errmsg=
 734                         total_commits=$(
 735                         if test $mod_src = 160000 -a $mod_dst = 160000
 736                         then
 737                                 range="$sha1_src...$sha1_dst"
 738                         elif test $mod_src = 160000
 739                         then
 740                                 range=$sha1_src
 741                         else
 742                                 range=$sha1_dst
 743                         fi
 744                         GIT_DIR="$name/.git" \
 745                         git rev-list --first-parent $range -- | wc -l
 746                         )
 747                         total_commits=" ($(($total_commits + 0)))"
 748                         ;;
 749                 esac
 750
 751                 sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
 752                 sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
 753                 if test $status = T
 754                 then
 755                         blob="$(gettext "blob")"
 756                         submodule="$(gettext "submodule")"
 757                         if test $mod_dst = 160000
 758                         then
 759                                 echo "* $name $sha1_abbr_src($blob)->$sha1_abbr_dst($submodule)$total_commits:"
 760                         else
 761                                 echo "* $name $sha1_abbr_src($submodule)->$sha1_abbr_dst($blob)$total_commits:"
 762                         fi
 763                 else
 764                         echo "* $name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
 765                 fi
 766                 if test -n "$errmsg"
 767                 then
 768                         # Don't give error msg for modification whose dst is not submodule
 769                         # i.e. deleted or changed to blob
 770                         test $mod_dst = 160000 && echo "$errmsg"
 771                 else
 772                         if test $mod_src = 160000 -a $mod_dst = 160000
 773                         then
 774                                 limit=
 775                                 test $summary_limit -gt 0 && limit="-$summary_limit"
 776                                 GIT_DIR="$name/.git" \
 777                                 git log $limit --pretty='format:  %m %s' \
 778                                 --first-parent $sha1_src...$sha1_dst
 779                         elif test $mod_dst = 160000
 780                         then
 781                                 GIT_DIR="$name/.git" \
 782                                 git log --pretty='format:  > %s' -1 $sha1_dst
 783                         else
 784                                 GIT_DIR="$name/.git" \
 785                                 git log --pretty='format:  < %s' -1 $sha1_src
 786                         fi
 787                         echo
 788                 fi
 789                 echo
 790         done |
 791         if test -n "$for_status"; then
 792                 if [ -n "$files" ]; then
 793                         status_msg="$(gettext "# Submodules changed but not updated:")"
 794                 else
 795                         status_msg="$(gettext "# Submodule changes to be committed:")"
 796                 fi
 797                 status_sed=$(sed -e 's|^|# |' -e 's|^# $|#|')
 798                 cat <<EOF
 799 $status_msg
 800 #
 801 $status_sed
 802 EOF
 803         else
 804                 cat
 805         fi
 806 }
 807 #
 808 # List all submodules, prefixed with:
 809 #  - submodule not initialized
 810 #  + different revision checked out
 811 #
 812 # If --cached was specified the revision in the index will be printed
 813 # instead of the currently checked out revision.
 814 #
 815 # $@ = requested paths (default to all)
 816 #
 817 cmd_status()
 818 {
 819         # parse $args after "submodule ... status".
 820         orig_flags=
 821         while test $# -ne 0
 822         do
 823                 case "$1" in
 824                 -q|--quiet)
 825                         GIT_QUIET=1
 826                         ;;
 827                 --cached)
 828                         cached=1
 829                         ;;
 830                 --recursive)
 831                         recursive=1
 832                         ;;
 833                 --)
 834                         shift
 835                         break
 836                         ;;
 837                 -*)
 838                         usage
 839                         ;;
 840                 *)
 841                         break
 842                         ;;
 843                 esac
 844                 orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 845                 shift
 846         done
 847
 848         module_list "$@" |
 849         while read mode sha1 stage path
 850         do
 851                 name=$(module_name "$path") || exit
 852                 url=$(git config submodule."$name".url)
 853                 displaypath="$prefix$path"
 854                 if test "$stage" = U
 855                 then
 856                         say "U$sha1 $displaypath"
 857                         continue
 858                 fi
 859                 if test -z "$url" || ! test -d "$path"/.git -o -f "$path"/.git
 860                 then
 861                         say "-$sha1 $displaypath"
 862                         continue;
 863                 fi
 864                 set_name_rev "$path" "$sha1"
 865                 if git diff-files --ignore-submodules=dirty --quiet -- "$path"
 866                 then
 867                         say " $sha1 $displaypath$revname"
 868                 else
 869                         if test -z "$cached"
 870                         then
 871                                 sha1=$(clear_local_git_env; cd "$path" && git rev-parse --verify HEAD)
 872                                 set_name_rev "$path" "$sha1"
 873                         fi
 874                         say "+$sha1 $displaypath$revname"
 875                 fi
 876
 877                 if test -n "$recursive"
 878                 then
 879                         (
 880                                 prefix="$displaypath/"
 881                                 clear_local_git_env
 882                                 cd "$path" &&
 883                                 eval cmd_status "$orig_args"
 884                         ) ||
 885                         die "$(eval_gettext "Failed to recurse into submodule path '\$path'")"
 886                 fi
 887         done
 888 }
 889 #
 890 # Sync remote urls for submodules
 891 # This makes the value for remote.$remote.url match the value
 892 # specified in .gitmodules.
 893 #
 894 cmd_sync()
 895 {
 896         while test $# -ne 0
 897         do
 898                 case "$1" in
 899                 -q|--quiet)
 900                         GIT_QUIET=1
 901                         shift
 902                         ;;
 903                 --)
 904                         shift
 905                         break
 906                         ;;
 907                 -*)
 908                         usage
 909                         ;;
 910                 *)
 911                         break
 912                         ;;
 913                 esac
 914         done
 915         cd_to_toplevel
 916         module_list "$@" |
 917         while read mode sha1 stage path
 918         do
 919                 name=$(module_name "$path")
 920                 url=$(git config -f .gitmodules --get submodule."$name".url)
 921
 922                 # Possibly a url relative to parent
 923                 case "$url" in
 924                 ./*|../*)
 925                         url=$(resolve_relative_url "$url") || exit
 926                         ;;
 927                 esac
 928
 929                 if git config "submodule.$name.url" >/dev/null 2>/dev/null
 930                 then
 931                         say "$(eval_gettext "Synchronizing submodule url for '\$name'")"
 932                         git config submodule."$name".url "$url"
 933
 934                         if test -e "$path"/.git
 935                         then
 936                         (
 937                                 clear_local_git_env
 938                                 cd "$path"
 939                                 remote=$(get_default_remote)
 940                                 git config remote."$remote".url "$url"
 941                         )
 942                         fi
 943                 fi
 944         done
 945 }
 946
 947 # This loop parses the command line arguments to find the
 948 # subcommand name to dispatch.  Parsing of the subcommand specific
 949 # options are primarily done by the subcommand implementations.
 950 # Subcommand specific options such as --branch and --cached are
 951 # parsed here as well, for backward compatibility.
 952
 953 while test $# != 0 && test -z "$command"
 954 do
 955         case "$1" in
 956         add | foreach | init | update | status | summary | sync)
 957                 command=$1
 958                 ;;
 959         -q|--quiet)
 960                 GIT_QUIET=1
 961                 ;;
 962         -b|--branch)
 963                 case "$2" in
 964                 '')
 965                         usage
 966                         ;;
 967                 esac
 968                 branch="$2"; shift
 969                 ;;
 970         --cached)
 971                 cached="$1"
 972                 ;;
 973         --)
 974                 break
 975                 ;;
 976         -*)
 977                 usage
 978                 ;;
 979         *)
 980                 break
 981                 ;;
 982         esac
 983         shift
 984 done
 985
 986 # No command word defaults to "status"
 987 test -n "$command" || command=status
 988
 989 # "-b branch" is accepted only by "add"
 990 if test -n "$branch" && test "$command" != add
 991 then
 992         usage
 993 fi
 994
 995 # "--cached" is accepted only by "status" and "summary"
 996 if test -n "$cached" && test "$command" != status -a "$command" != summary
 997 then
 998         usage
 999 fi
1000
1001 "cmd_$command" "$@"