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