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