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: $dashless [--quiet] sync [--] [<path>...]"
  15 OPTIONS_SPEC=
  16 . git-sh-setup
  17 . git-parse-remote
  18 require_work_tree
  19
  20 command=
  21 branch=
  22 force=
  23 reference=
  24 cached=
  25 recursive=
  26 init=
  27 files=
  28 nofetch=
  29 update=
  30 prefix=
  31
  32 # Resolve relative url by appending to parent's url
  33 resolve_relative_url ()
  34 {
  35         remote=$(get_default_remote)
  36         remoteurl=$(git config "remote.$remote.url") ||
  37                 die "remote ($remote) does not have a url defined in .git/config"
  38         url="$1"
  39         remoteurl=${remoteurl%/}
  40         sep=/
  41         while test -n "$url"
  42         do
  43                 case "$url" in
  44                 ../*)
  45                         url="${url#../}"
  46                         case "$remoteurl" in
  47                         */*)
  48                                 remoteurl="${remoteurl%/*}"
  49                                 ;;
  50                         *:*)
  51                                 remoteurl="${remoteurl%:*}"
  52                                 sep=:
  53                                 ;;
  54                         *)
  55                                 die "cannot strip one component off url '$remoteurl'"
  56                                 ;;
  57                         esac
  58                         ;;
  59                 ./*)
  60                         url="${url#./}"
  61                         ;;
  62                 *)
  63                         break;;
  64                 esac
  65         done
  66         echo "$remoteurl$sep${url%/}"
  67 }
  68
  69 #
  70 # Get submodule info for registered submodules
  71 # $@ = path to limit submodule list
  72 #
  73 module_list()
  74 {
  75         git ls-files --error-unmatch --stage -- "$@" |
  76         perl -e '
  77         my %unmerged = ();
  78         my ($null_sha1) = ("0" x 40);
  79         while (<STDIN>) {
  80                 chomp;
  81                 my ($mode, $sha1, $stage, $path) =
  82                         /^([0-7]+) ([0-9a-f]{40}) ([0-3])\t(.*)$/;
  83                 next unless $mode eq "160000";
  84                 if ($stage ne "0") {
  85                         if (!$unmerged{$path}++) {
  86                                 print "$mode $null_sha1 U\t$path\n";
  87                         }
  88                         next;
  89                 }
  90                 print "$_\n";
  91         }
  92         '
  93 }
  94
  95 #
  96 # Map submodule path to submodule name
  97 #
  98 # $1 = path
  99 #
 100 module_name()
 101 {
 102         # Do we have "submodule.<something>.path = $1" defined in .gitmodules file?
 103         re=$(printf '%s\n' "$1" | sed -e 's/[].[^$\\*]/\\&/g')
 104         name=$( git config -f .gitmodules --get-regexp '^submodule\..*\.path$' |
 105                 sed -n -e 's|^submodule\.\(.*\)\.path '"$re"'$|\1|p' )
 106        test -z "$name" &&
 107        die "No submodule mapping found in .gitmodules for path '$path'"
 108        echo "$name"
 109 }
 110
 111 #
 112 # Clone a submodule
 113 #
 114 # Prior to calling, cmd_update checks that a possibly existing
 115 # path is not a git repository.
 116 # Likewise, cmd_add checks that path does not exist at all,
 117 # since it is the location of a new submodule.
 118 #
 119 module_clone()
 120 {
 121         path=$1
 122         url=$2
 123         reference="$3"
 124
 125         if test -n "$reference"
 126         then
 127                 git-clone "$reference" -n "$url" "$path"
 128         else
 129                 git-clone -n "$url" "$path"
 130         fi ||
 131         die "Clone of '$url' into submodule path '$path' failed"
 132 }
 133
 134 #
 135 # Add a new submodule to the working tree, .gitmodules and the index
 136 #
 137 # $@ = repo path
 138 #
 139 # optional branch is stored in global branch variable
 140 #
 141 cmd_add()
 142 {
 143         # parse $args after "submodule ... add".
 144         while test $# -ne 0
 145         do
 146                 case "$1" in
 147                 -b | --branch)
 148                         case "$2" in '') usage ;; esac
 149                         branch=$2
 150                         shift
 151                         ;;
 152                 -f | --force)
 153                         force=$1
 154                         ;;
 155                 -q|--quiet)
 156                         GIT_QUIET=1
 157                         ;;
 158                 --reference)
 159                         case "$2" in '') usage ;; esac
 160                         reference="--reference=$2"
 161                         shift
 162                         ;;
 163                 --reference=*)
 164                         reference="$1"
 165                         shift
 166                         ;;
 167                 --)
 168                         shift
 169                         break
 170                         ;;
 171                 -*)
 172                         usage
 173                         ;;
 174                 *)
 175                         break
 176                         ;;
 177                 esac
 178                 shift
 179         done
 180
 181         repo=$1
 182         path=$2
 183
 184         if test -z "$path"; then
 185                 path=$(echo "$repo" |
 186                         sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
 187         fi
 188
 189         if test -z "$repo" -o -z "$path"; then
 190                 usage
 191         fi
 192
 193         # assure repo is absolute or relative to parent
 194         case "$repo" in
 195         ./*|../*)
 196                 # dereference source url relative to parent's url
 197                 realrepo=$(resolve_relative_url "$repo") || exit
 198                 ;;
 199         *:*|/*)
 200                 # absolute url
 201                 realrepo=$repo
 202                 ;;
 203         *)
 204                 die "repo URL: '$repo' must be absolute or begin with ./|../"
 205         ;;
 206         esac
 207
 208         # normalize path:
 209         # multiple //; leading ./; /./; /../; trailing /
 210         path=$(printf '%s/\n' "$path" |
 211                 sed -e '
 212                         s|//*|/|g
 213                         s|^\(\./\)*||
 214                         s|/\./|/|g
 215                         :start
 216                         s|\([^/]*\)/\.\./||
 217                         tstart
 218                         s|/*$||
 219                 ')
 220         git ls-files --error-unmatch "$path" > /dev/null 2>&1 &&
 221         die "'$path' already exists in the index"
 222
 223         if test -z "$force" && ! git add --dry-run --ignore-missing "$path" > /dev/null 2>&1
 224         then
 225                 echo >&2 "The following path is ignored by one of your .gitignore files:" &&
 226                 echo >&2 $path &&
 227                 echo >&2 "Use -f if you really want to add it."
 228                 exit 1
 229         fi
 230
 231         # perhaps the path exists and is already a git repo, else clone it
 232         if test -e "$path"
 233         then
 234                 if test -d "$path"/.git -o -f "$path"/.git
 235                 then
 236                         echo "Adding existing repo at '$path' to the index"
 237                 else
 238                         die "'$path' already exists and is not a valid git repo"
 239                 fi
 240
 241                 case "$repo" in
 242                 ./*|../*)
 243                         url=$(resolve_relative_url "$repo") || exit
 244                     ;;
 245                 *)
 246                         url="$repo"
 247                         ;;
 248                 esac
 249                 git config submodule."$path".url "$url"
 250         else
 251
 252                 module_clone "$path" "$realrepo" "$reference" || exit
 253                 (
 254                         clear_local_git_env
 255                         cd "$path" &&
 256                         # ash fails to wordsplit ${branch:+-b "$branch"...}
 257                         case "$branch" in
 258                         '') git checkout -f -q ;;
 259                         ?*) git checkout -f -q -B "$branch" "origin/$branch" ;;
 260                         esac
 261                 ) || die "Unable to checkout submodule '$path'"
 262         fi
 263
 264         git add $force "$path" ||
 265         die "Failed to add submodule '$path'"
 266
 267         git config -f .gitmodules submodule."$path".path "$path" &&
 268         git config -f .gitmodules submodule."$path".url "$repo" &&
 269         git add --force .gitmodules ||
 270         die "Failed to register submodule '$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         module_list |
 304         while read mode sha1 stage path
 305         do
 306                 if test -e "$path"/.git
 307                 then
 308                         say "Entering '$prefix$path'"
 309                         name=$(module_name "$path")
 310                         (
 311                                 prefix="$prefix$path/"
 312                                 clear_local_git_env
 313                                 cd "$path" &&
 314                                 eval "$@" &&
 315                                 if test -n "$recursive"
 316                                 then
 317                                         cmd_foreach "--recursive" "$@"
 318                                 fi
 319                         ) ||
 320                         die "Stopping at '$path'; script returned non-zero status."
 321                 fi
 322         done
 323 }
 324
 325 #
 326 # Register submodules in .git/config
 327 #
 328 # $@ = requested paths (default to all)
 329 #
 330 cmd_init()
 331 {
 332         # parse $args after "submodule ... init".
 333         while test $# -ne 0
 334         do
 335                 case "$1" in
 336                 -q|--quiet)
 337                         GIT_QUIET=1
 338                         ;;
 339                 --)
 340                         shift
 341                         break
 342                         ;;
 343                 -*)
 344                         usage
 345                         ;;
 346                 *)
 347                         break
 348                         ;;
 349                 esac
 350                 shift
 351         done
 352
 353         module_list "$@" |
 354         while read mode sha1 stage path
 355         do
 356                 # Skip already registered paths
 357                 name=$(module_name "$path") || exit
 358                 url=$(git config submodule."$name".url)
 359                 test -z "$url" || continue
 360
 361                 url=$(git config -f .gitmodules submodule."$name".url)
 362                 test -z "$url" &&
 363                 die "No url found for submodule path '$path' in .gitmodules"
 364
 365                 # Possibly a url relative to parent
 366                 case "$url" in
 367                 ./*|../*)
 368                         url=$(resolve_relative_url "$url") || exit
 369                         ;;
 370                 esac
 371
 372                 git config submodule."$name".url "$url" ||
 373                 die "Failed to register url for submodule path '$path'"
 374
 375                 upd="$(git config -f .gitmodules submodule."$name".update)"
 376                 test -z "$upd" ||
 377                 git config submodule."$name".update "$upd" ||
 378                 die "Failed to register update mode for submodule path '$path'"
 379
 380                 say "Submodule '$name' ($url) registered for path '$path'"
 381         done
 382 }
 383
 384 #
 385 # Update each submodule path to correct revision, using clone and checkout as needed
 386 #
 387 # $@ = requested paths (default to all)
 388 #
 389 cmd_update()
 390 {
 391         # parse $args after "submodule ... update".
 392         orig_flags=
 393         while test $# -ne 0
 394         do
 395                 case "$1" in
 396                 -q|--quiet)
 397                         GIT_QUIET=1
 398                         ;;
 399                 -i|--init)
 400                         init=1
 401                         ;;
 402                 -N|--no-fetch)
 403                         nofetch=1
 404                         ;;
 405                 -f|--force)
 406                         force=$1
 407                         ;;
 408                 -r|--rebase)
 409                         update="rebase"
 410                         ;;
 411                 --reference)
 412                         case "$2" in '') usage ;; esac
 413                         reference="--reference=$2"
 414                         orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 415                         shift
 416                         ;;
 417                 --reference=*)
 418                         reference="$1"
 419                         ;;
 420                 -m|--merge)
 421                         update="merge"
 422                         ;;
 423                 --recursive)
 424                         recursive=1
 425                         ;;
 426                 --)
 427                         shift
 428                         break
 429                         ;;
 430                 -*)
 431                         usage
 432                         ;;
 433                 *)
 434                         break
 435                         ;;
 436                 esac
 437                 orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 438                 shift
 439         done
 440
 441         if test -n "$init"
 442         then
 443                 cmd_init "--" "$@" || return
 444         fi
 445
 446         cloned_modules=
 447         module_list "$@" | {
 448         err=
 449         while read mode sha1 stage path
 450         do
 451                 if test "$stage" = U
 452                 then
 453                         echo >&2 "Skipping unmerged submodule $path"
 454                         continue
 455                 fi
 456                 name=$(module_name "$path") || exit
 457                 url=$(git config submodule."$name".url)
 458                 update_module=$(git config submodule."$name".update)
 459                 if test -z "$url"
 460                 then
 461                         # Only mention uninitialized submodules when its
 462                         # path have been specified
 463                         test "$#" != "0" &&
 464                         say "Submodule path '$path' not initialized" &&
 465                         say "Maybe you want to use 'update --init'?"
 466                         continue
 467                 fi
 468
 469                 if ! test -d "$path"/.git -o -f "$path"/.git
 470                 then
 471                         module_clone "$path" "$url" "$reference"|| exit
 472                         cloned_modules="$cloned_modules;$name"
 473                         subsha1=
 474                 else
 475                         subsha1=$(clear_local_git_env; cd "$path" &&
 476                                 git rev-parse --verify HEAD) ||
 477                         die "Unable to find current revision in submodule path '$path'"
 478                 fi
 479
 480                 if ! test -z "$update"
 481                 then
 482                         update_module=$update
 483                 fi
 484
 485                 if test "$subsha1" != "$sha1"
 486                 then
 487                         subforce=$force
 488                         # If we don't already have a -f flag and the submodule has never been checked out
 489                         if test -z "$subsha1" -a -z "$force"
 490                         then
 491                                 subforce="-f"
 492                         fi
 493
 494                         if test -z "$nofetch"
 495                         then
 496                                 # Run fetch only if $sha1 isn't present or it
 497                                 # is not reachable from a ref.
 498                                 (clear_local_git_env; cd "$path" &&
 499                                         ( (rev=$(git rev-list -n 1 $sha1 --not --all 2>/dev/null) &&
 500                                          test -z "$rev") || git-fetch)) ||
 501                                 die "Unable to fetch in submodule path '$path'"
 502                         fi
 503
 504                         # Is this something we just cloned?
 505                         case ";$cloned_modules;" in
 506                         *";$name;"*)
 507                                 # then there is no local change to integrate
 508                                 update_module= ;;
 509                         esac
 510
 511                         case "$update_module" in
 512                         rebase)
 513                                 command="git rebase"
 514                                 action="rebase"
 515                                 msg="rebased onto"
 516                                 ;;
 517                         merge)
 518                                 command="git merge"
 519                                 action="merge"
 520                                 msg="merged in"
 521                                 ;;
 522                         *)
 523                                 command="git checkout $subforce -q"
 524                                 action="checkout"
 525                                 msg="checked out"
 526                                 ;;
 527                         esac
 528
 529                         if (clear_local_git_env; cd "$path" && $command "$sha1")
 530                         then
 531                                 say "Submodule path '$path': $msg '$sha1'"
 532                         else
 533                                 case $action in
 534                                 rebase|merge)
 535                                         die_with_status 2 "Unable to $action '$sha1' in submodule path '$path'"
 536                                         ;;
 537                                 *)
 538                                         err="${err};Failed to $action in submodule path '$path'"
 539                                         continue
 540                                         ;;
 541                                 esac
 542                         fi
 543                 fi
 544
 545                 if test -n "$recursive"
 546                 then
 547                         (clear_local_git_env; cd "$path" && eval cmd_update "$orig_flags")
 548                         res=$?
 549                         if test $res -gt 0
 550                         then
 551                                 if test $res -eq 1
 552                                 then
 553                                         err="${err};Failed to recurse into submodule path '$path'"
 554                                         continue
 555                                 else
 556                                         die_with_status $res "Failed to recurse into submodule path '$path'"
 557                                 fi
 558                         fi
 559                 fi
 560         done
 561
 562         if test -n "$err"
 563         then
 564                 OIFS=$IFS
 565                 IFS=';'
 566                 for e in $err
 567                 do
 568                         if test -n "$e"
 569                         then
 570                                 echo >&2 "$e"
 571                         fi
 572                 done
 573                 IFS=$OIFS
 574                 exit 1
 575         fi
 576         }
 577 }
 578
 579 set_name_rev () {
 580         revname=$( (
 581                 clear_local_git_env
 582                 cd "$1" && {
 583                         git describe "$2" 2>/dev/null ||
 584                         git describe --tags "$2" 2>/dev/null ||
 585                         git describe --contains "$2" 2>/dev/null ||
 586                         git describe --all --always "$2"
 587                 }
 588         ) )
 589         test -z "$revname" || revname=" ($revname)"
 590 }
 591 #
 592 # Show commit summary for submodules in index or working tree
 593 #
 594 # If '--cached' is given, show summary between index and given commit,
 595 # or between working tree and given commit
 596 #
 597 # $@ = [commit (default 'HEAD'),] requested paths (default all)
 598 #
 599 cmd_summary() {
 600         summary_limit=-1
 601         for_status=
 602         diff_cmd=diff-index
 603
 604         # parse $args after "submodule ... summary".
 605         while test $# -ne 0
 606         do
 607                 case "$1" in
 608                 --cached)
 609                         cached="$1"
 610                         ;;
 611                 --files)
 612                         files="$1"
 613                         ;;
 614                 --for-status)
 615                         for_status="$1"
 616                         ;;
 617                 -n|--summary-limit)
 618                         if summary_limit=$(($2 + 0)) 2>/dev/null && test "$summary_limit" = "$2"
 619                         then
 620                                 :
 621                         else
 622                                 usage
 623                         fi
 624                         shift
 625                         ;;
 626                 --)
 627                         shift
 628                         break
 629                         ;;
 630                 -*)
 631                         usage
 632                         ;;
 633                 *)
 634                         break
 635                         ;;
 636                 esac
 637                 shift
 638         done
 639
 640         test $summary_limit = 0 && return
 641
 642         if rev=$(git rev-parse -q --verify --default HEAD ${1+"$1"})
 643         then
 644                 head=$rev
 645                 test $# = 0 || shift
 646         elif test -z "$1" -o "$1" = "HEAD"
 647         then
 648                 # before the first commit: compare with an empty tree
 649                 head=$(git hash-object -w -t tree --stdin </dev/null)
 650                 test -z "$1" || shift
 651         else
 652                 head="HEAD"
 653         fi
 654
 655         if [ -n "$files" ]
 656         then
 657                 test -n "$cached" &&
 658                 die "--cached cannot be used with --files"
 659                 diff_cmd=diff-files
 660                 head=
 661         fi
 662
 663         cd_to_toplevel
 664         # Get modified modules cared by user
 665         modules=$(git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- "$@" |
 666                 sane_egrep '^:([0-7]* )?160000' |
 667                 while read mod_src mod_dst sha1_src sha1_dst status name
 668                 do
 669                         # Always show modules deleted or type-changed (blob<->module)
 670                         test $status = D -o $status = T && echo "$name" && continue
 671                         # Also show added or modified modules which are checked out
 672                         GIT_DIR="$name/.git" git-rev-parse --git-dir >/dev/null 2>&1 &&
 673                         echo "$name"
 674                 done
 675         )
 676
 677         test -z "$modules" && return
 678
 679         git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- $modules |
 680         sane_egrep '^:([0-7]* )?160000' |
 681         cut -c2- |
 682         while read mod_src mod_dst sha1_src sha1_dst status name
 683         do
 684                 if test -z "$cached" &&
 685                         test $sha1_dst = 0000000000000000000000000000000000000000
 686                 then
 687                         case "$mod_dst" in
 688                         160000)
 689                                 sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
 690                                 ;;
 691                         100644 | 100755 | 120000)
 692                                 sha1_dst=$(git hash-object $name)
 693                                 ;;
 694                         000000)
 695                                 ;; # removed
 696                         *)
 697                                 # unexpected type
 698                                 echo >&2 "unexpected mode $mod_dst"
 699                                 continue ;;
 700                         esac
 701                 fi
 702                 missing_src=
 703                 missing_dst=
 704
 705                 test $mod_src = 160000 &&
 706                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_src^0 >/dev/null &&
 707                 missing_src=t
 708
 709                 test $mod_dst = 160000 &&
 710                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_dst^0 >/dev/null &&
 711                 missing_dst=t
 712
 713                 total_commits=
 714                 case "$missing_src,$missing_dst" in
 715                 t,)
 716                         errmsg="  Warn: $name doesn't contain commit $sha1_src"
 717                         ;;
 718                 ,t)
 719                         errmsg="  Warn: $name doesn't contain commit $sha1_dst"
 720                         ;;
 721                 t,t)
 722                         errmsg="  Warn: $name doesn't contain commits $sha1_src and $sha1_dst"
 723                         ;;
 724                 *)
 725                         errmsg=
 726                         total_commits=$(
 727                         if test $mod_src = 160000 -a $mod_dst = 160000
 728                         then
 729                                 range="$sha1_src...$sha1_dst"
 730                         elif test $mod_src = 160000
 731                         then
 732                                 range=$sha1_src
 733                         else
 734                                 range=$sha1_dst
 735                         fi
 736                         GIT_DIR="$name/.git" \
 737                         git rev-list --first-parent $range -- | wc -l
 738                         )
 739                         total_commits=" ($(($total_commits + 0)))"
 740                         ;;
 741                 esac
 742
 743                 sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
 744                 sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
 745                 if test $status = T
 746                 then
 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                         echo "# Submodules changed but not updated:"
 784                 else
 785                         echo "# 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 "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 "$url") || exit
 912                         ;;
 913                 esac
 914
 915                 say "Synchronizing submodule url for '$name'"
 916                 git config submodule."$name".url "$url"
 917
 918                 if test -e "$path"/.git
 919                 then
 920                 (
 921                         clear_local_git_env
 922                         cd "$path"
 923                         remote=$(get_default_remote)
 924                         git config remote."$remote".url "$url"
 925                 )
 926                 fi
 927         done
 928 }
 929
 930 # This loop parses the command line arguments to find the
 931 # subcommand name to dispatch.  Parsing of the subcommand specific
 932 # options are primarily done by the subcommand implementations.
 933 # Subcommand specific options such as --branch and --cached are
 934 # parsed here as well, for backward compatibility.
 935
 936 while test $# != 0 && test -z "$command"
 937 do
 938         case "$1" in
 939         add | foreach | init | update | status | summary | sync)
 940                 command=$1
 941                 ;;
 942         -q|--quiet)
 943                 GIT_QUIET=1
 944                 ;;
 945         -b|--branch)
 946                 case "$2" in
 947                 '')
 948                         usage
 949                         ;;
 950                 esac
 951                 branch="$2"; shift
 952                 ;;
 953         --cached)
 954                 cached="$1"
 955                 ;;
 956         --)
 957                 break
 958                 ;;
 959         -*)
 960                 usage
 961                 ;;
 962         *)
 963                 break
 964                 ;;
 965         esac
 966         shift
 967 done
 968
 969 # No command word defaults to "status"
 970 test -n "$command" || command=status
 971
 972 # "-b branch" is accepted only by "add"
 973 if test -n "$branch" && test "$command" != add
 974 then
 975         usage
 976 fi
 977
 978 # "--cached" is accepted only by "status" and "summary"
 979 if test -n "$cached" && test "$command" != status -a "$command" != summary
 980 then
 981         usage
 982 fi
 983
 984 "cmd_$command" "$@"