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 "$path" > /dev/null 2>&1
 225         then
 226                 (
 227                         eval_gettext "The following path is ignored by one of your .gitignore files:
 228 \$path
 229 Use -f if you really want to add it." &&
 230                         echo
 231                 ) >&2
 232                 exit 1
 233         fi
 234
 235         # perhaps the path exists and is already a git repo, else clone it
 236         if test -e "$path"
 237         then
 238                 if test -d "$path"/.git -o -f "$path"/.git
 239                 then
 240                         eval_gettext "Adding existing repo at '\$path' to the index"; echo
 241                 else
 242                         die "$(eval_gettext "'\$path' already exists and is not a valid git repo")"
 243                 fi
 244
 245         else
 246
 247                 module_clone "$path" "$realrepo" "$reference" || exit
 248                 (
 249                         clear_local_git_env
 250                         cd "$path" &&
 251                         # ash fails to wordsplit ${branch:+-b "$branch"...}
 252                         case "$branch" in
 253                         '') git checkout -f -q ;;
 254                         ?*) git checkout -f -q -B "$branch" "origin/$branch" ;;
 255                         esac
 256                 ) || die "$(eval_gettext "Unable to checkout submodule '\$path'")"
 257         fi
 258         git config submodule."$path".url "$realrepo"
 259
 260         git add $force "$path" ||
 261         die "$(eval_gettext "Failed to add submodule '\$path'")"
 262
 263         git config -f .gitmodules submodule."$path".path "$path" &&
 264         git config -f .gitmodules submodule."$path".url "$repo" &&
 265         git add --force .gitmodules ||
 266         die "$(eval_gettext "Failed to register submodule '\$path'")"
 267 }
 268
 269 #
 270 # Execute an arbitrary command sequence in each checked out
 271 # submodule
 272 #
 273 # $@ = command to execute
 274 #
 275 cmd_foreach()
 276 {
 277         # parse $args after "submodule ... foreach".
 278         while test $# -ne 0
 279         do
 280                 case "$1" in
 281                 -q|--quiet)
 282                         GIT_QUIET=1
 283                         ;;
 284                 --recursive)
 285                         recursive=1
 286                         ;;
 287                 -*)
 288                         usage
 289                         ;;
 290                 *)
 291                         break
 292                         ;;
 293                 esac
 294                 shift
 295         done
 296
 297         toplevel=$(pwd)
 298
 299         # dup stdin so that it can be restored when running the external
 300         # command in the subshell (and a recursive call to this function)
 301         exec 3<&0
 302
 303         module_list |
 304         while read mode sha1 stage path
 305         do
 306                 if test -e "$path"/.git
 307                 then
 308                         say "$(eval_gettext "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                         ) <&3 3<&- ||
 320                         die "$(eval_gettext "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                 if test -z "$(git config "submodule.$name.url")"
 359                 then
 360                         url=$(git config -f .gitmodules submodule."$name".url)
 361                         test -z "$url" &&
 362                         die "$(eval_gettext "No url found for submodule path '\$path' in .gitmodules")"
 363
 364                         # Possibly a url relative to parent
 365                         case "$url" in
 366                         ./*|../*)
 367                                 url=$(resolve_relative_url "$url") || exit
 368                                 ;;
 369                         esac
 370                         git config submodule."$name".url "$url" ||
 371                         die "$(eval_gettext "Failed to register url for submodule path '\$path'")"
 372                 fi
 373
 374                 # Copy "update" setting when it is not set yet
 375                 upd="$(git config -f .gitmodules submodule."$name".update)"
 376                 test -z "$upd" ||
 377                 test -n "$(git config submodule."$name".update)" ||
 378                 git config submodule."$name".update "$upd" ||
 379                 die "$(eval_gettext "Failed to register update mode for submodule path '\$path'")"
 380
 381                 say "$(eval_gettext "Submodule '\$name' (\$url) registered for path '\$path'")"
 382         done
 383 }
 384
 385 #
 386 # Update each submodule path to correct revision, using clone and checkout as needed
 387 #
 388 # $@ = requested paths (default to all)
 389 #
 390 cmd_update()
 391 {
 392         # parse $args after "submodule ... update".
 393         orig_flags=
 394         while test $# -ne 0
 395         do
 396                 case "$1" in
 397                 -q|--quiet)
 398                         GIT_QUIET=1
 399                         ;;
 400                 -i|--init)
 401                         init=1
 402                         ;;
 403                 -N|--no-fetch)
 404                         nofetch=1
 405                         ;;
 406                 -f|--force)
 407                         force=$1
 408                         ;;
 409                 -r|--rebase)
 410                         update="rebase"
 411                         ;;
 412                 --reference)
 413                         case "$2" in '') usage ;; esac
 414                         reference="--reference=$2"
 415                         orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 416                         shift
 417                         ;;
 418                 --reference=*)
 419                         reference="$1"
 420                         ;;
 421                 -m|--merge)
 422                         update="merge"
 423                         ;;
 424                 --recursive)
 425                         recursive=1
 426                         ;;
 427                 --)
 428                         shift
 429                         break
 430                         ;;
 431                 -*)
 432                         usage
 433                         ;;
 434                 *)
 435                         break
 436                         ;;
 437                 esac
 438                 orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 439                 shift
 440         done
 441
 442         if test -n "$init"
 443         then
 444                 cmd_init "--" "$@" || return
 445         fi
 446
 447         cloned_modules=
 448         module_list "$@" | {
 449         err=
 450         while read mode sha1 stage path
 451         do
 452                 if test "$stage" = U
 453                 then
 454                         echo >&2 "Skipping unmerged submodule $path"
 455                         continue
 456                 fi
 457                 name=$(module_name "$path") || exit
 458                 url=$(git config submodule."$name".url)
 459                 update_module=$(git config submodule."$name".update)
 460                 if test -z "$url"
 461                 then
 462                         # Only mention uninitialized submodules when its
 463                         # path have been specified
 464                         test "$#" != "0" &&
 465                         say "$(eval_gettext "Submodule path '\$path' not initialized
 466 Maybe you want to use 'update --init'?")"
 467                         continue
 468                 fi
 469
 470                 if ! test -d "$path"/.git -o -f "$path"/.git
 471                 then
 472                         module_clone "$path" "$url" "$reference"|| exit
 473                         cloned_modules="$cloned_modules;$name"
 474                         subsha1=
 475                 else
 476                         subsha1=$(clear_local_git_env; cd "$path" &&
 477                                 git rev-parse --verify HEAD) ||
 478                         die "$(eval_gettext "Unable to find current revision in submodule path '\$path'")"
 479                 fi
 480
 481                 if ! test -z "$update"
 482                 then
 483                         update_module=$update
 484                 fi
 485
 486                 if test "$subsha1" != "$sha1"
 487                 then
 488                         subforce=$force
 489                         # If we don't already have a -f flag and the submodule has never been checked out
 490                         if test -z "$subsha1" -a -z "$force"
 491                         then
 492                                 subforce="-f"
 493                         fi
 494
 495                         if test -z "$nofetch"
 496                         then
 497                                 # Run fetch only if $sha1 isn't present or it
 498                                 # is not reachable from a ref.
 499                                 (clear_local_git_env; cd "$path" &&
 500                                         ( (rev=$(git rev-list -n 1 $sha1 --not --all 2>/dev/null) &&
 501                                          test -z "$rev") || git-fetch)) ||
 502                                 die "$(eval_gettext "Unable to fetch in submodule path '\$path'")"
 503                         fi
 504
 505                         # Is this something we just cloned?
 506                         case ";$cloned_modules;" in
 507                         *";$name;"*)
 508                                 # then there is no local change to integrate
 509                                 update_module= ;;
 510                         esac
 511
 512                         must_die_on_failure=
 513                         case "$update_module" in
 514                         rebase)
 515                                 command="git rebase"
 516                                 die_msg="$(eval_gettext "Unable to rebase '\$sha1' in submodule path '\$path'")"
 517                                 say_msg="$(eval_gettext "Submodule path '\$path': rebased into '\$sha1'")"
 518                                 must_die_on_failure=yes
 519                                 ;;
 520                         merge)
 521                                 command="git merge"
 522                                 die_msg="$(eval_gettext "Unable to merge '\$sha1' in submodule path '\$path'")"
 523                                 say_msg="$(eval_gettext "Submodule path '\$path': merged in '\$sha1'")"
 524                                 must_die_on_failure=yes
 525                                 ;;
 526                         *)
 527                                 command="git checkout $subforce -q"
 528                                 die_msg="$(eval_gettext "Unable to checkout '\$sha1' in submodule path '\$path'")"
 529                                 say_msg="$(eval_gettext "Submodule path '\$path': checked out '\$sha1'")"
 530                                 ;;
 531                         esac
 532
 533                         if (clear_local_git_env; cd "$path" && $command "$sha1")
 534                         then
 535                                 say "$say_msg"
 536                         elif test -n "$must_die_on_failure"
 537                         then
 538                                 die_with_status 2 "$die_msg"
 539                         else
 540                                 err="${err};$die_msg"
 541                                 continue
 542                         fi
 543                 fi
 544
 545                 if test -n "$recursive"
 546                 then
 547                         (clear_local_git_env; cd "$path" && eval cmd_update "$orig_flags")
 548                         res=$?
 549                         if test $res -gt 0
 550                         then
 551                                 die_msg="$(eval_gettext "Failed to recurse into submodule path '\$path'")"
 552                                 if test $res -eq 1
 553                                 then
 554                                         err="${err};$die_msg"
 555                                         continue
 556                                 else
 557                                         die_with_status $res "$die_msg"
 558                                 fi
 559                         fi
 560                 fi
 561         done
 562
 563         if test -n "$err"
 564         then
 565                 OIFS=$IFS
 566                 IFS=';'
 567                 for e in $err
 568                 do
 569                         if test -n "$e"
 570                         then
 571                                 echo >&2 "$e"
 572                         fi
 573                 done
 574                 IFS=$OIFS
 575                 exit 1
 576         fi
 577         }
 578 }
 579
 580 set_name_rev () {
 581         revname=$( (
 582                 clear_local_git_env
 583                 cd "$1" && {
 584                         git describe "$2" 2>/dev/null ||
 585                         git describe --tags "$2" 2>/dev/null ||
 586                         git describe --contains "$2" 2>/dev/null ||
 587                         git describe --all --always "$2"
 588                 }
 589         ) )
 590         test -z "$revname" || revname=" ($revname)"
 591 }
 592 #
 593 # Show commit summary for submodules in index or working tree
 594 #
 595 # If '--cached' is given, show summary between index and given commit,
 596 # or between working tree and given commit
 597 #
 598 # $@ = [commit (default 'HEAD'),] requested paths (default all)
 599 #
 600 cmd_summary() {
 601         summary_limit=-1
 602         for_status=
 603         diff_cmd=diff-index
 604
 605         # parse $args after "submodule ... summary".
 606         while test $# -ne 0
 607         do
 608                 case "$1" in
 609                 --cached)
 610                         cached="$1"
 611                         ;;
 612                 --files)
 613                         files="$1"
 614                         ;;
 615                 --for-status)
 616                         for_status="$1"
 617                         ;;
 618                 -n|--summary-limit)
 619                         if summary_limit=$(($2 + 0)) 2>/dev/null && test "$summary_limit" = "$2"
 620                         then
 621                                 :
 622                         else
 623                                 usage
 624                         fi
 625                         shift
 626                         ;;
 627                 --)
 628                         shift
 629                         break
 630                         ;;
 631                 -*)
 632                         usage
 633                         ;;
 634                 *)
 635                         break
 636                         ;;
 637                 esac
 638                 shift
 639         done
 640
 641         test $summary_limit = 0 && return
 642
 643         if rev=$(git rev-parse -q --verify --default HEAD ${1+"$1"})
 644         then
 645                 head=$rev
 646                 test $# = 0 || shift
 647         elif test -z "$1" -o "$1" = "HEAD"
 648         then
 649                 # before the first commit: compare with an empty tree
 650                 head=$(git hash-object -w -t tree --stdin </dev/null)
 651                 test -z "$1" || shift
 652         else
 653                 head="HEAD"
 654         fi
 655
 656         if [ -n "$files" ]
 657         then
 658                 test -n "$cached" &&
 659                 die "$(gettext -- "--cached cannot be used with --files")"
 660                 diff_cmd=diff-files
 661                 head=
 662         fi
 663
 664         cd_to_toplevel
 665         # Get modified modules cared by user
 666         modules=$(git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- "$@" |
 667                 sane_egrep '^:([0-7]* )?160000' |
 668                 while read mod_src mod_dst sha1_src sha1_dst status name
 669                 do
 670                         # Always show modules deleted or type-changed (blob<->module)
 671                         test $status = D -o $status = T && echo "$name" && continue
 672                         # Also show added or modified modules which are checked out
 673                         GIT_DIR="$name/.git" git-rev-parse --git-dir >/dev/null 2>&1 &&
 674                         echo "$name"
 675                 done
 676         )
 677
 678         test -z "$modules" && return
 679
 680         git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- $modules |
 681         sane_egrep '^:([0-7]* )?160000' |
 682         cut -c2- |
 683         while read mod_src mod_dst sha1_src sha1_dst status name
 684         do
 685                 if test -z "$cached" &&
 686                         test $sha1_dst = 0000000000000000000000000000000000000000
 687                 then
 688                         case "$mod_dst" in
 689                         160000)
 690                                 sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
 691                                 ;;
 692                         100644 | 100755 | 120000)
 693                                 sha1_dst=$(git hash-object $name)
 694                                 ;;
 695                         000000)
 696                                 ;; # removed
 697                         *)
 698                                 # unexpected type
 699                                 (
 700                                         eval_gettext "unexpected mode \$mod_dst" &&
 701                                         echo
 702                                 ) >&2
 703                                 continue ;;
 704                         esac
 705                 fi
 706                 missing_src=
 707                 missing_dst=
 708
 709                 test $mod_src = 160000 &&
 710                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_src^0 >/dev/null &&
 711                 missing_src=t
 712
 713                 test $mod_dst = 160000 &&
 714                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_dst^0 >/dev/null &&
 715                 missing_dst=t
 716
 717                 total_commits=
 718                 case "$missing_src,$missing_dst" in
 719                 t,)
 720                         errmsg="$(eval_gettext "  Warn: \$name doesn't contain commit \$sha1_src")"
 721                         ;;
 722                 ,t)
 723                         errmsg="$(eval_gettext "  Warn: \$name doesn't contain commit \$sha1_dst")"
 724                         ;;
 725                 t,t)
 726                         errmsg="$(eval_gettext "  Warn: \$name doesn't contain commits \$sha1_src and \$sha1_dst")"
 727                         ;;
 728                 *)
 729                         errmsg=
 730                         total_commits=$(
 731                         if test $mod_src = 160000 -a $mod_dst = 160000
 732                         then
 733                                 range="$sha1_src...$sha1_dst"
 734                         elif test $mod_src = 160000
 735                         then
 736                                 range=$sha1_src
 737                         else
 738                                 range=$sha1_dst
 739                         fi
 740                         GIT_DIR="$name/.git" \
 741                         git rev-list --first-parent $range -- | wc -l
 742                         )
 743                         total_commits=" ($(($total_commits + 0)))"
 744                         ;;
 745                 esac
 746
 747                 sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
 748                 sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
 749                 if test $status = T
 750                 then
 751                         blob="$(gettext "blob")"
 752                         submodule="$(gettext "submodule")"
 753                         if test $mod_dst = 160000
 754                         then
 755                                 echo "* $name $sha1_abbr_src($blob)->$sha1_abbr_dst($submodule)$total_commits:"
 756                         else
 757                                 echo "* $name $sha1_abbr_src($submodule)->$sha1_abbr_dst($blob)$total_commits:"
 758                         fi
 759                 else
 760                         echo "* $name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
 761                 fi
 762                 if test -n "$errmsg"
 763                 then
 764                         # Don't give error msg for modification whose dst is not submodule
 765                         # i.e. deleted or changed to blob
 766                         test $mod_dst = 160000 && echo "$errmsg"
 767                 else
 768                         if test $mod_src = 160000 -a $mod_dst = 160000
 769                         then
 770                                 limit=
 771                                 test $summary_limit -gt 0 && limit="-$summary_limit"
 772                                 GIT_DIR="$name/.git" \
 773                                 git log $limit --pretty='format:  %m %s' \
 774                                 --first-parent $sha1_src...$sha1_dst
 775                         elif test $mod_dst = 160000
 776                         then
 777                                 GIT_DIR="$name/.git" \
 778                                 git log --pretty='format:  > %s' -1 $sha1_dst
 779                         else
 780                                 GIT_DIR="$name/.git" \
 781                                 git log --pretty='format:  < %s' -1 $sha1_src
 782                         fi
 783                         echo
 784                 fi
 785                 echo
 786         done |
 787         if test -n "$for_status"; then
 788                 if [ -n "$files" ]; then
 789                         gettext "# Submodules changed but not updated:"; echo
 790                 else
 791                         gettext "# Submodule changes to be committed:"; echo
 792                 fi
 793                 echo "#"
 794                 sed -e 's|^|# |' -e 's|^# $|#|'
 795         else
 796                 cat
 797         fi
 798 }
 799 #
 800 # List all submodules, prefixed with:
 801 #  - submodule not initialized
 802 #  + different revision checked out
 803 #
 804 # If --cached was specified the revision in the index will be printed
 805 # instead of the currently checked out revision.
 806 #
 807 # $@ = requested paths (default to all)
 808 #
 809 cmd_status()
 810 {
 811         # parse $args after "submodule ... status".
 812         orig_flags=
 813         while test $# -ne 0
 814         do
 815                 case "$1" in
 816                 -q|--quiet)
 817                         GIT_QUIET=1
 818                         ;;
 819                 --cached)
 820                         cached=1
 821                         ;;
 822                 --recursive)
 823                         recursive=1
 824                         ;;
 825                 --)
 826                         shift
 827                         break
 828                         ;;
 829                 -*)
 830                         usage
 831                         ;;
 832                 *)
 833                         break
 834                         ;;
 835                 esac
 836                 orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 837                 shift
 838         done
 839
 840         module_list "$@" |
 841         while read mode sha1 stage path
 842         do
 843                 name=$(module_name "$path") || exit
 844                 url=$(git config submodule."$name".url)
 845                 displaypath="$prefix$path"
 846                 if test "$stage" = U
 847                 then
 848                         say "U$sha1 $displaypath"
 849                         continue
 850                 fi
 851                 if test -z "$url" || ! test -d "$path"/.git -o -f "$path"/.git
 852                 then
 853                         say "-$sha1 $displaypath"
 854                         continue;
 855                 fi
 856                 set_name_rev "$path" "$sha1"
 857                 if git diff-files --ignore-submodules=dirty --quiet -- "$path"
 858                 then
 859                         say " $sha1 $displaypath$revname"
 860                 else
 861                         if test -z "$cached"
 862                         then
 863                                 sha1=$(clear_local_git_env; cd "$path" && git rev-parse --verify HEAD)
 864                                 set_name_rev "$path" "$sha1"
 865                         fi
 866                         say "+$sha1 $displaypath$revname"
 867                 fi
 868
 869                 if test -n "$recursive"
 870                 then
 871                         (
 872                                 prefix="$displaypath/"
 873                                 clear_local_git_env
 874                                 cd "$path" &&
 875                                 eval cmd_status "$orig_args"
 876                         ) ||
 877                         die "$(eval_gettext "Failed to recurse into submodule path '\$path'")"
 878                 fi
 879         done
 880 }
 881 #
 882 # Sync remote urls for submodules
 883 # This makes the value for remote.$remote.url match the value
 884 # specified in .gitmodules.
 885 #
 886 cmd_sync()
 887 {
 888         while test $# -ne 0
 889         do
 890                 case "$1" in
 891                 -q|--quiet)
 892                         GIT_QUIET=1
 893                         shift
 894                         ;;
 895                 --)
 896                         shift
 897                         break
 898                         ;;
 899                 -*)
 900                         usage
 901                         ;;
 902                 *)
 903                         break
 904                         ;;
 905                 esac
 906         done
 907         cd_to_toplevel
 908         module_list "$@" |
 909         while read mode sha1 stage path
 910         do
 911                 name=$(module_name "$path")
 912                 url=$(git config -f .gitmodules --get submodule."$name".url)
 913
 914                 # Possibly a url relative to parent
 915                 case "$url" in
 916                 ./*|../*)
 917                         url=$(resolve_relative_url "$url") || exit
 918                         ;;
 919                 esac
 920
 921                 if git config "submodule.$name.url" >/dev/null 2>/dev/null
 922                 then
 923                         say "$(eval_gettext "Synchronizing submodule url for '\$name'")"
 924                         git config submodule."$name".url "$url"
 925
 926                         if test -e "$path"/.git
 927                         then
 928                         (
 929                                 clear_local_git_env
 930                                 cd "$path"
 931                                 remote=$(get_default_remote)
 932                                 git config remote."$remote".url "$url"
 933                         )
 934                         fi
 935                 fi
 936         done
 937 }
 938
 939 # This loop parses the command line arguments to find the
 940 # subcommand name to dispatch.  Parsing of the subcommand specific
 941 # options are primarily done by the subcommand implementations.
 942 # Subcommand specific options such as --branch and --cached are
 943 # parsed here as well, for backward compatibility.
 944
 945 while test $# != 0 && test -z "$command"
 946 do
 947         case "$1" in
 948         add | foreach | init | update | status | summary | sync)
 949                 command=$1
 950                 ;;
 951         -q|--quiet)
 952                 GIT_QUIET=1
 953                 ;;
 954         -b|--branch)
 955                 case "$2" in
 956                 '')
 957                         usage
 958                         ;;
 959                 esac
 960                 branch="$2"; shift
 961                 ;;
 962         --cached)
 963                 cached="$1"
 964                 ;;
 965         --)
 966                 break
 967                 ;;
 968         -*)
 969                 usage
 970                 ;;
 971         *)
 972                 break
 973                 ;;
 974         esac
 975         shift
 976 done
 977
 978 # No command word defaults to "status"
 979 test -n "$command" || command=status
 980
 981 # "-b branch" is accepted only by "add"
 982 if test -n "$branch" && test "$command" != add
 983 then
 984         usage
 985 fi
 986
 987 # "--cached" is accepted only by "status" and "summary"
 988 if test -n "$cached" && test "$command" != status -a "$command" != summary
 989 then
 990         usage
 991 fi
 992
 993 "cmd_$command" "$@"