git-submodule.sh

   1 #!/bin/sh
   2 #
   3 # git-submodules.sh: add, init, update or list git submodules
   4 #
   5 # Copyright (c) 2007 Lars Hjemli
   6
   7 dashless=$(basename "$0" | sed -e 's/-/ /')
   8 USAGE="[--quiet] add [-b branch] [-f|--force] [--reference <repository>] [--] <repository> [<path>]
   9    or: $dashless [--quiet] status [--cached] [--recursive] [--] [<path>...]
  10    or: $dashless [--quiet] init [--] [<path>...]
  11    or: $dashless [--quiet] update [--init] [-N|--no-fetch] [-f|--force] [--rebase] [--reference <repository>] [--merge] [--recursive] [--] [<path>...]
  12    or: $dashless [--quiet] summary [--cached|--files] [--summary-limit <n>] [commit] [--] [<path>...]
  13    or: $dashless [--quiet] foreach [--recursive] <command>
  14    or: $dashless [--quiet] sync [--] [<path>...]"
  15 OPTIONS_SPEC=
  16 . git-sh-setup
  17 . git-sh-i18n
  18 . git-parse-remote
  19 require_work_tree
  20
  21 command=
  22 branch=
  23 force=
  24 reference=
  25 cached=
  26 recursive=
  27 init=
  28 files=
  29 nofetch=
  30 update=
  31 prefix=
  32
  33 # Resolve relative url by appending to parent's url
  34 resolve_relative_url ()
  35 {
  36         remote=$(get_default_remote)
  37         remoteurl=$(git config "remote.$remote.url") ||
  38                 remoteurl=$(pwd) # the repository is its own authoritative upstream
  39         url="$1"
  40         remoteurl=${remoteurl%/}
  41         sep=/
  42         while test -n "$url"
  43         do
  44                 case "$url" in
  45                 ../*)
  46                         url="${url#../}"
  47                         case "$remoteurl" in
  48                         */*)
  49                                 remoteurl="${remoteurl%/*}"
  50                                 ;;
  51                         *:*)
  52                                 remoteurl="${remoteurl%:*}"
  53                                 sep=:
  54                                 ;;
  55                         *)
  56                                 die "$(eval_gettext "cannot strip one component off url '\$remoteurl'")"
  57                                 ;;
  58                         esac
  59                         ;;
  60                 ./*)
  61                         url="${url#./}"
  62                         ;;
  63                 *)
  64                         break;;
  65                 esac
  66         done
  67         echo "$remoteurl$sep${url%/}"
  68 }
  69
  70 #
  71 # Get submodule info for registered submodules
  72 # $@ = path to limit submodule list
  73 #
  74 module_list()
  75 {
  76         git ls-files --error-unmatch --stage -- "$@" |
  77         perl -e '
  78         my %unmerged = ();
  79         my ($null_sha1) = ("0" x 40);
  80         while (<STDIN>) {
  81                 chomp;
  82                 my ($mode, $sha1, $stage, $path) =
  83                         /^([0-7]+) ([0-9a-f]{40}) ([0-3])\t(.*)$/;
  84                 next unless $mode eq "160000";
  85                 if ($stage ne "0") {
  86                         if (!$unmerged{$path}++) {
  87                                 print "$mode $null_sha1 U\t$path\n";
  88                         }
  89                         next;
  90                 }
  91                 print "$_\n";
  92         }
  93         '
  94 }
  95
  96 #
  97 # Map submodule path to submodule name
  98 #
  99 # $1 = path
 100 #
 101 module_name()
 102 {
 103         # Do we have "submodule.<something>.path = $1" defined in .gitmodules file?
 104         re=$(printf '%s\n' "$1" | sed -e 's/[].[^$\\*]/\\&/g')
 105         name=$( git config -f .gitmodules --get-regexp '^submodule\..*\.path$' |
 106                 sed -n -e 's|^submodule\.\(.*\)\.path '"$re"'$|\1|p' )
 107         test -z "$name" &&
 108         die "$(eval_gettext "No submodule mapping found in .gitmodules for path '\$path'")"
 109         echo "$name"
 110 }
 111
 112 #
 113 # Clone a submodule
 114 #
 115 # Prior to calling, cmd_update checks that a possibly existing
 116 # path is not a git repository.
 117 # Likewise, cmd_add checks that path does not exist at all,
 118 # since it is the location of a new submodule.
 119 #
 120 module_clone()
 121 {
 122         path=$1
 123         url=$2
 124         reference="$3"
 125         quiet=
 126         if test -n "$GIT_QUIET"
 127         then
 128                 quiet=-q
 129         fi
 130
 131         gitdir=
 132         gitdir_base=
 133         name=$(module_name "$path" 2>/dev/null)
 134         test -n "$name" || name="$path"
 135         base_path=$(dirname "$path")
 136
 137         gitdir=$(git rev-parse --git-dir)
 138         gitdir_base="$gitdir/modules/$base_path"
 139         gitdir="$gitdir/modules/$path"
 140
 141         case $gitdir in
 142         /*)
 143                 a="$(cd_to_toplevel && pwd)/"
 144                 b=$gitdir
 145                 while [ "$b" ] && [ "${a%%/*}" = "${b%%/*}" ]
 146                 do
 147                         a=${a#*/} b=${b#*/};
 148                 done
 149
 150                 rel="$a$name"
 151                 rel=`echo $rel | sed -e 's|[^/]*|..|g'`
 152                 rel_gitdir="$rel/$b"
 153                 ;;
 154         *)
 155                 rel=`echo $name | sed -e 's|[^/]*|..|g'`
 156                 rel_gitdir="$rel/$gitdir"
 157                 ;;
 158         esac
 159
 160         if test -d "$gitdir"
 161         then
 162                 mkdir -p "$path"
 163                 rm -f "$gitdir/index"
 164         else
 165                 mkdir -p "$gitdir_base"
 166                 git clone $quiet -n ${reference:+"$reference"} \
 167                         --separate-git-dir "$gitdir" "$url" "$path" ||
 168                 die "$(eval_gettext "Clone of '\$url' into submodule path '\$path' failed")"
 169         fi
 170
 171         echo "gitdir: $rel_gitdir" >"$path/.git"
 172 }
 173
 174 #
 175 # Add a new submodule to the working tree, .gitmodules and the index
 176 #
 177 # $@ = repo path
 178 #
 179 # optional branch is stored in global branch variable
 180 #
 181 cmd_add()
 182 {
 183         # parse $args after "submodule ... add".
 184         while test $# -ne 0
 185         do
 186                 case "$1" in
 187                 -b | --branch)
 188                         case "$2" in '') usage ;; esac
 189                         branch=$2
 190                         shift
 191                         ;;
 192                 -f | --force)
 193                         force=$1
 194                         ;;
 195                 -q|--quiet)
 196                         GIT_QUIET=1
 197                         ;;
 198                 --reference)
 199                         case "$2" in '') usage ;; esac
 200                         reference="--reference=$2"
 201                         shift
 202                         ;;
 203                 --reference=*)
 204                         reference="$1"
 205                         shift
 206                         ;;
 207                 --)
 208                         shift
 209                         break
 210                         ;;
 211                 -*)
 212                         usage
 213                         ;;
 214                 *)
 215                         break
 216                         ;;
 217                 esac
 218                 shift
 219         done
 220
 221         repo=$1
 222         path=$2
 223
 224         if test -z "$path"; then
 225                 path=$(echo "$repo" |
 226                         sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
 227         fi
 228
 229         if test -z "$repo" -o -z "$path"; then
 230                 usage
 231         fi
 232
 233         # assure repo is absolute or relative to parent
 234         case "$repo" in
 235         ./*|../*)
 236                 # dereference source url relative to parent's url
 237                 realrepo=$(resolve_relative_url "$repo") || exit
 238                 ;;
 239         *:*|/*)
 240                 # absolute url
 241                 realrepo=$repo
 242                 ;;
 243         *)
 244                 die "$(eval_gettext "repo URL: '\$repo' must be absolute or begin with ./|../")"
 245         ;;
 246         esac
 247
 248         # normalize path:
 249         # multiple //; leading ./; /./; /../; trailing /
 250         path=$(printf '%s/\n' "$path" |
 251                 sed -e '
 252                         s|//*|/|g
 253                         s|^\(\./\)*||
 254                         s|/\./|/|g
 255                         :start
 256                         s|\([^/]*\)/\.\./||
 257                         tstart
 258                         s|/*$||
 259                 ')
 260         git ls-files --error-unmatch "$path" > /dev/null 2>&1 &&
 261         die "$(eval_gettext "'\$path' already exists in the index")"
 262
 263         if test -z "$force" && ! git add --dry-run --ignore-missing "$path" > /dev/null 2>&1
 264         then
 265                 eval_gettextln "The following path is ignored by one of your .gitignore files:
 266 \$path
 267 Use -f if you really want to add it." >&2
 268                 exit 1
 269         fi
 270
 271         # perhaps the path exists and is already a git repo, else clone it
 272         if test -e "$path"
 273         then
 274                 if test -d "$path"/.git -o -f "$path"/.git
 275                 then
 276                         eval_gettextln "Adding existing repo at '\$path' to the index"
 277                 else
 278                         die "$(eval_gettext "'\$path' already exists and is not a valid git repo")"
 279                 fi
 280
 281         else
 282
 283                 module_clone "$path" "$realrepo" "$reference" || exit
 284                 (
 285                         clear_local_git_env
 286                         cd "$path" &&
 287                         # ash fails to wordsplit ${branch:+-b "$branch"...}
 288                         case "$branch" in
 289                         '') git checkout -f -q ;;
 290                         ?*) git checkout -f -q -B "$branch" "origin/$branch" ;;
 291                         esac
 292                 ) || die "$(eval_gettext "Unable to checkout submodule '\$path'")"
 293         fi
 294         git config submodule."$path".url "$realrepo"
 295
 296         git add $force "$path" ||
 297         die "$(eval_gettext "Failed to add submodule '\$path'")"
 298
 299         git config -f .gitmodules submodule."$path".path "$path" &&
 300         git config -f .gitmodules submodule."$path".url "$repo" &&
 301         git add --force .gitmodules ||
 302         die "$(eval_gettext "Failed to register submodule '\$path'")"
 303 }
 304
 305 #
 306 # Execute an arbitrary command sequence in each checked out
 307 # submodule
 308 #
 309 # $@ = command to execute
 310 #
 311 cmd_foreach()
 312 {
 313         # parse $args after "submodule ... foreach".
 314         while test $# -ne 0
 315         do
 316                 case "$1" in
 317                 -q|--quiet)
 318                         GIT_QUIET=1
 319                         ;;
 320                 --recursive)
 321                         recursive=1
 322                         ;;
 323                 -*)
 324                         usage
 325                         ;;
 326                 *)
 327                         break
 328                         ;;
 329                 esac
 330                 shift
 331         done
 332
 333         toplevel=$(pwd)
 334
 335         # dup stdin so that it can be restored when running the external
 336         # command in the subshell (and a recursive call to this function)
 337         exec 3<&0
 338
 339         module_list |
 340         while read mode sha1 stage path
 341         do
 342                 if test -e "$path"/.git
 343                 then
 344                         say "$(eval_gettext "Entering '\$prefix\$path'")"
 345                         name=$(module_name "$path")
 346                         (
 347                                 prefix="$prefix$path/"
 348                                 clear_local_git_env
 349                                 cd "$path" &&
 350                                 eval "$@" &&
 351                                 if test -n "$recursive"
 352                                 then
 353                                         cmd_foreach "--recursive" "$@"
 354                                 fi
 355                         ) <&3 3<&- ||
 356                         die "$(eval_gettext "Stopping at '\$path'; script returned non-zero status.")"
 357                 fi
 358         done
 359 }
 360
 361 #
 362 # Register submodules in .git/config
 363 #
 364 # $@ = requested paths (default to all)
 365 #
 366 cmd_init()
 367 {
 368         # parse $args after "submodule ... init".
 369         while test $# -ne 0
 370         do
 371                 case "$1" in
 372                 -q|--quiet)
 373                         GIT_QUIET=1
 374                         ;;
 375                 --)
 376                         shift
 377                         break
 378                         ;;
 379                 -*)
 380                         usage
 381                         ;;
 382                 *)
 383                         break
 384                         ;;
 385                 esac
 386                 shift
 387         done
 388
 389         module_list "$@" |
 390         while read mode sha1 stage path
 391         do
 392                 # Skip already registered paths
 393                 name=$(module_name "$path") || exit
 394                 if test -z "$(git config "submodule.$name.url")"
 395                 then
 396                         url=$(git config -f .gitmodules submodule."$name".url)
 397                         test -z "$url" &&
 398                         die "$(eval_gettext "No url found for submodule path '\$path' in .gitmodules")"
 399
 400                         # Possibly a url relative to parent
 401                         case "$url" in
 402                         ./*|../*)
 403                                 url=$(resolve_relative_url "$url") || exit
 404                                 ;;
 405                         esac
 406                         git config submodule."$name".url "$url" ||
 407                         die "$(eval_gettext "Failed to register url for submodule path '\$path'")"
 408                 fi
 409
 410                 # Copy "update" setting when it is not set yet
 411                 upd="$(git config -f .gitmodules submodule."$name".update)"
 412                 test -z "$upd" ||
 413                 test -n "$(git config submodule."$name".update)" ||
 414                 git config submodule."$name".update "$upd" ||
 415                 die "$(eval_gettext "Failed to register update mode for submodule path '\$path'")"
 416
 417                 say "$(eval_gettext "Submodule '\$name' (\$url) registered for path '\$path'")"
 418         done
 419 }
 420
 421 #
 422 # Update each submodule path to correct revision, using clone and checkout as needed
 423 #
 424 # $@ = requested paths (default to all)
 425 #
 426 cmd_update()
 427 {
 428         # parse $args after "submodule ... update".
 429         orig_flags=
 430         while test $# -ne 0
 431         do
 432                 case "$1" in
 433                 -q|--quiet)
 434                         GIT_QUIET=1
 435                         ;;
 436                 -i|--init)
 437                         init=1
 438                         ;;
 439                 -N|--no-fetch)
 440                         nofetch=1
 441                         ;;
 442                 -f|--force)
 443                         force=$1
 444                         ;;
 445                 -r|--rebase)
 446                         update="rebase"
 447                         ;;
 448                 --reference)
 449                         case "$2" in '') usage ;; esac
 450                         reference="--reference=$2"
 451                         orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 452                         shift
 453                         ;;
 454                 --reference=*)
 455                         reference="$1"
 456                         ;;
 457                 -m|--merge)
 458                         update="merge"
 459                         ;;
 460                 --recursive)
 461                         recursive=1
 462                         ;;
 463                 --checkout)
 464                         update="checkout"
 465                         ;;
 466                 --)
 467                         shift
 468                         break
 469                         ;;
 470                 -*)
 471                         usage
 472                         ;;
 473                 *)
 474                         break
 475                         ;;
 476                 esac
 477                 orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 478                 shift
 479         done
 480
 481         if test -n "$init"
 482         then
 483                 cmd_init "--" "$@" || return
 484         fi
 485
 486         cloned_modules=
 487         module_list "$@" | {
 488         err=
 489         while read mode sha1 stage path
 490         do
 491                 if test "$stage" = U
 492                 then
 493                         echo >&2 "Skipping unmerged submodule $path"
 494                         continue
 495                 fi
 496                 name=$(module_name "$path") || exit
 497                 url=$(git config submodule."$name".url)
 498                 if ! test -z "$update"
 499                 then
 500                         update_module=$update
 501                 else
 502                         update_module=$(git config submodule."$name".update)
 503                 fi
 504
 505                 if test "$update_module" = "none"
 506                 then
 507                         echo "Skipping submodule '$path'"
 508                         continue
 509                 fi
 510
 511                 if test -z "$url"
 512                 then
 513                         # Only mention uninitialized submodules when its
 514                         # path have been specified
 515                         test "$#" != "0" &&
 516                         say "$(eval_gettext "Submodule path '\$path' not initialized
 517 Maybe you want to use 'update --init'?")"
 518                         continue
 519                 fi
 520
 521                 if ! test -d "$path"/.git -o -f "$path"/.git
 522                 then
 523                         module_clone "$path" "$url" "$reference"|| exit
 524                         cloned_modules="$cloned_modules;$name"
 525                         subsha1=
 526                 else
 527                         subsha1=$(clear_local_git_env; cd "$path" &&
 528                                 git rev-parse --verify HEAD) ||
 529                         die "$(eval_gettext "Unable to find current revision in submodule path '\$path'")"
 530                 fi
 531
 532                 if test "$subsha1" != "$sha1"
 533                 then
 534                         subforce=$force
 535                         # If we don't already have a -f flag and the submodule has never been checked out
 536                         if test -z "$subsha1" -a -z "$force"
 537                         then
 538                                 subforce="-f"
 539                         fi
 540
 541                         if test -z "$nofetch"
 542                         then
 543                                 # Run fetch only if $sha1 isn't present or it
 544                                 # is not reachable from a ref.
 545                                 (clear_local_git_env; cd "$path" &&
 546                                         ( (rev=$(git rev-list -n 1 $sha1 --not --all 2>/dev/null) &&
 547                                          test -z "$rev") || git-fetch)) ||
 548                                 die "$(eval_gettext "Unable to fetch in submodule path '\$path'")"
 549                         fi
 550
 551                         # Is this something we just cloned?
 552                         case ";$cloned_modules;" in
 553                         *";$name;"*)
 554                                 # then there is no local change to integrate
 555                                 update_module= ;;
 556                         esac
 557
 558                         must_die_on_failure=
 559                         case "$update_module" in
 560                         rebase)
 561                                 command="git rebase"
 562                                 die_msg="$(eval_gettext "Unable to rebase '\$sha1' in submodule path '\$path'")"
 563                                 say_msg="$(eval_gettext "Submodule path '\$path': rebased into '\$sha1'")"
 564                                 must_die_on_failure=yes
 565                                 ;;
 566                         merge)
 567                                 command="git merge"
 568                                 die_msg="$(eval_gettext "Unable to merge '\$sha1' in submodule path '\$path'")"
 569                                 say_msg="$(eval_gettext "Submodule path '\$path': merged in '\$sha1'")"
 570                                 must_die_on_failure=yes
 571                                 ;;
 572                         *)
 573                                 command="git checkout $subforce -q"
 574                                 die_msg="$(eval_gettext "Unable to checkout '\$sha1' in submodule path '\$path'")"
 575                                 say_msg="$(eval_gettext "Submodule path '\$path': checked out '\$sha1'")"
 576                                 ;;
 577                         esac
 578
 579                         if (clear_local_git_env; cd "$path" && $command "$sha1")
 580                         then
 581                                 say "$say_msg"
 582                         elif test -n "$must_die_on_failure"
 583                         then
 584                                 die_with_status 2 "$die_msg"
 585                         else
 586                                 err="${err};$die_msg"
 587                                 continue
 588                         fi
 589                 fi
 590
 591                 if test -n "$recursive"
 592                 then
 593                         (clear_local_git_env; cd "$path" && eval cmd_update "$orig_flags")
 594                         res=$?
 595                         if test $res -gt 0
 596                         then
 597                                 die_msg="$(eval_gettext "Failed to recurse into submodule path '\$path'")"
 598                                 if test $res -eq 1
 599                                 then
 600                                         err="${err};$die_msg"
 601                                         continue
 602                                 else
 603                                         die_with_status $res "$die_msg"
 604                                 fi
 605                         fi
 606                 fi
 607         done
 608
 609         if test -n "$err"
 610         then
 611                 OIFS=$IFS
 612                 IFS=';'
 613                 for e in $err
 614                 do
 615                         if test -n "$e"
 616                         then
 617                                 echo >&2 "$e"
 618                         fi
 619                 done
 620                 IFS=$OIFS
 621                 exit 1
 622         fi
 623         }
 624 }
 625
 626 set_name_rev () {
 627         revname=$( (
 628                 clear_local_git_env
 629                 cd "$1" && {
 630                         git describe "$2" 2>/dev/null ||
 631                         git describe --tags "$2" 2>/dev/null ||
 632                         git describe --contains "$2" 2>/dev/null ||
 633                         git describe --all --always "$2"
 634                 }
 635         ) )
 636         test -z "$revname" || revname=" ($revname)"
 637 }
 638 #
 639 # Show commit summary for submodules in index or working tree
 640 #
 641 # If '--cached' is given, show summary between index and given commit,
 642 # or between working tree and given commit
 643 #
 644 # $@ = [commit (default 'HEAD'),] requested paths (default all)
 645 #
 646 cmd_summary() {
 647         summary_limit=-1
 648         for_status=
 649         diff_cmd=diff-index
 650
 651         # parse $args after "submodule ... summary".
 652         while test $# -ne 0
 653         do
 654                 case "$1" in
 655                 --cached)
 656                         cached="$1"
 657                         ;;
 658                 --files)
 659                         files="$1"
 660                         ;;
 661                 --for-status)
 662                         for_status="$1"
 663                         ;;
 664                 -n|--summary-limit)
 665                         if summary_limit=$(($2 + 0)) 2>/dev/null && test "$summary_limit" = "$2"
 666                         then
 667                                 :
 668                         else
 669                                 usage
 670                         fi
 671                         shift
 672                         ;;
 673                 --)
 674                         shift
 675                         break
 676                         ;;
 677                 -*)
 678                         usage
 679                         ;;
 680                 *)
 681                         break
 682                         ;;
 683                 esac
 684                 shift
 685         done
 686
 687         test $summary_limit = 0 && return
 688
 689         if rev=$(git rev-parse -q --verify --default HEAD ${1+"$1"})
 690         then
 691                 head=$rev
 692                 test $# = 0 || shift
 693         elif test -z "$1" -o "$1" = "HEAD"
 694         then
 695                 # before the first commit: compare with an empty tree
 696                 head=$(git hash-object -w -t tree --stdin </dev/null)
 697                 test -z "$1" || shift
 698         else
 699                 head="HEAD"
 700         fi
 701
 702         if [ -n "$files" ]
 703         then
 704                 test -n "$cached" &&
 705                 die "$(gettext -- "--cached cannot be used with --files")"
 706                 diff_cmd=diff-files
 707                 head=
 708         fi
 709
 710         cd_to_toplevel
 711         # Get modified modules cared by user
 712         modules=$(git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- "$@" |
 713                 sane_egrep '^:([0-7]* )?160000' |
 714                 while read mod_src mod_dst sha1_src sha1_dst status name
 715                 do
 716                         # Always show modules deleted or type-changed (blob<->module)
 717                         test $status = D -o $status = T && echo "$name" && continue
 718                         # Also show added or modified modules which are checked out
 719                         GIT_DIR="$name/.git" git-rev-parse --git-dir >/dev/null 2>&1 &&
 720                         echo "$name"
 721                 done
 722         )
 723
 724         test -z "$modules" && return
 725
 726         git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- $modules |
 727         sane_egrep '^:([0-7]* )?160000' |
 728         cut -c2- |
 729         while read mod_src mod_dst sha1_src sha1_dst status name
 730         do
 731                 if test -z "$cached" &&
 732                         test $sha1_dst = 0000000000000000000000000000000000000000
 733                 then
 734                         case "$mod_dst" in
 735                         160000)
 736                                 sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
 737                                 ;;
 738                         100644 | 100755 | 120000)
 739                                 sha1_dst=$(git hash-object $name)
 740                                 ;;
 741                         000000)
 742                                 ;; # removed
 743                         *)
 744                                 # unexpected type
 745                                 eval_gettextln "unexpected mode \$mod_dst" >&2
 746                                 continue ;;
 747                         esac
 748                 fi
 749                 missing_src=
 750                 missing_dst=
 751
 752                 test $mod_src = 160000 &&
 753                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_src^0 >/dev/null &&
 754                 missing_src=t
 755
 756                 test $mod_dst = 160000 &&
 757                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_dst^0 >/dev/null &&
 758                 missing_dst=t
 759
 760                 total_commits=
 761                 case "$missing_src,$missing_dst" in
 762                 t,)
 763                         errmsg="$(eval_gettext "  Warn: \$name doesn't contain commit \$sha1_src")"
 764                         ;;
 765                 ,t)
 766                         errmsg="$(eval_gettext "  Warn: \$name doesn't contain commit \$sha1_dst")"
 767                         ;;
 768                 t,t)
 769                         errmsg="$(eval_gettext "  Warn: \$name doesn't contain commits \$sha1_src and \$sha1_dst")"
 770                         ;;
 771                 *)
 772                         errmsg=
 773                         total_commits=$(
 774                         if test $mod_src = 160000 -a $mod_dst = 160000
 775                         then
 776                                 range="$sha1_src...$sha1_dst"
 777                         elif test $mod_src = 160000
 778                         then
 779                                 range=$sha1_src
 780                         else
 781                                 range=$sha1_dst
 782                         fi
 783                         GIT_DIR="$name/.git" \
 784                         git rev-list --first-parent $range -- | wc -l
 785                         )
 786                         total_commits=" ($(($total_commits + 0)))"
 787                         ;;
 788                 esac
 789
 790                 sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
 791                 sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
 792                 if test $status = T
 793                 then
 794                         blob="$(gettext "blob")"
 795                         submodule="$(gettext "submodule")"
 796                         if test $mod_dst = 160000
 797                         then
 798                                 echo "* $name $sha1_abbr_src($blob)->$sha1_abbr_dst($submodule)$total_commits:"
 799                         else
 800                                 echo "* $name $sha1_abbr_src($submodule)->$sha1_abbr_dst($blob)$total_commits:"
 801                         fi
 802                 else
 803                         echo "* $name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
 804                 fi
 805                 if test -n "$errmsg"
 806                 then
 807                         # Don't give error msg for modification whose dst is not submodule
 808                         # i.e. deleted or changed to blob
 809                         test $mod_dst = 160000 && echo "$errmsg"
 810                 else
 811                         if test $mod_src = 160000 -a $mod_dst = 160000
 812                         then
 813                                 limit=
 814                                 test $summary_limit -gt 0 && limit="-$summary_limit"
 815                                 GIT_DIR="$name/.git" \
 816                                 git log $limit --pretty='format:  %m %s' \
 817                                 --first-parent $sha1_src...$sha1_dst
 818                         elif test $mod_dst = 160000
 819                         then
 820                                 GIT_DIR="$name/.git" \
 821                                 git log --pretty='format:  > %s' -1 $sha1_dst
 822                         else
 823                                 GIT_DIR="$name/.git" \
 824                                 git log --pretty='format:  < %s' -1 $sha1_src
 825                         fi
 826                         echo
 827                 fi
 828                 echo
 829         done |
 830         if test -n "$for_status"; then
 831                 if [ -n "$files" ]; then
 832                         gettextln "# Submodules changed but not updated:"
 833                 else
 834                         gettextln "# Submodule changes to be committed:"
 835                 fi
 836                 echo "#"
 837                 sed -e 's|^|# |' -e 's|^# $|#|'
 838         else
 839                 cat
 840         fi
 841 }
 842 #
 843 # List all submodules, prefixed with:
 844 #  - submodule not initialized
 845 #  + different revision checked out
 846 #
 847 # If --cached was specified the revision in the index will be printed
 848 # instead of the currently checked out revision.
 849 #
 850 # $@ = requested paths (default to all)
 851 #
 852 cmd_status()
 853 {
 854         # parse $args after "submodule ... status".
 855         orig_flags=
 856         while test $# -ne 0
 857         do
 858                 case "$1" in
 859                 -q|--quiet)
 860                         GIT_QUIET=1
 861                         ;;
 862                 --cached)
 863                         cached=1
 864                         ;;
 865                 --recursive)
 866                         recursive=1
 867                         ;;
 868                 --)
 869                         shift
 870                         break
 871                         ;;
 872                 -*)
 873                         usage
 874                         ;;
 875                 *)
 876                         break
 877                         ;;
 878                 esac
 879                 orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 880                 shift
 881         done
 882
 883         module_list "$@" |
 884         while read mode sha1 stage path
 885         do
 886                 name=$(module_name "$path") || exit
 887                 url=$(git config submodule."$name".url)
 888                 displaypath="$prefix$path"
 889                 if test "$stage" = U
 890                 then
 891                         say "U$sha1 $displaypath"
 892                         continue
 893                 fi
 894                 if test -z "$url" || ! test -d "$path"/.git -o -f "$path"/.git
 895                 then
 896                         say "-$sha1 $displaypath"
 897                         continue;
 898                 fi
 899                 set_name_rev "$path" "$sha1"
 900                 if git diff-files --ignore-submodules=dirty --quiet -- "$path"
 901                 then
 902                         say " $sha1 $displaypath$revname"
 903                 else
 904                         if test -z "$cached"
 905                         then
 906                                 sha1=$(clear_local_git_env; cd "$path" && git rev-parse --verify HEAD)
 907                                 set_name_rev "$path" "$sha1"
 908                         fi
 909                         say "+$sha1 $displaypath$revname"
 910                 fi
 911
 912                 if test -n "$recursive"
 913                 then
 914                         (
 915                                 prefix="$displaypath/"
 916                                 clear_local_git_env
 917                                 cd "$path" &&
 918                                 eval cmd_status "$orig_args"
 919                         ) ||
 920                         die "$(eval_gettext "Failed to recurse into submodule path '\$path'")"
 921                 fi
 922         done
 923 }
 924 #
 925 # Sync remote urls for submodules
 926 # This makes the value for remote.$remote.url match the value
 927 # specified in .gitmodules.
 928 #
 929 cmd_sync()
 930 {
 931         while test $# -ne 0
 932         do
 933                 case "$1" in
 934                 -q|--quiet)
 935                         GIT_QUIET=1
 936                         shift
 937                         ;;
 938                 --)
 939                         shift
 940                         break
 941                         ;;
 942                 -*)
 943                         usage
 944                         ;;
 945                 *)
 946                         break
 947                         ;;
 948                 esac
 949         done
 950         cd_to_toplevel
 951         module_list "$@" |
 952         while read mode sha1 stage path
 953         do
 954                 name=$(module_name "$path")
 955                 url=$(git config -f .gitmodules --get submodule."$name".url)
 956
 957                 # Possibly a url relative to parent
 958                 case "$url" in
 959                 ./*|../*)
 960                         url=$(resolve_relative_url "$url") || exit
 961                         ;;
 962                 esac
 963
 964                 if git config "submodule.$name.url" >/dev/null 2>/dev/null
 965                 then
 966                         say "$(eval_gettext "Synchronizing submodule url for '\$name'")"
 967                         git config submodule."$name".url "$url"
 968
 969                         if test -e "$path"/.git
 970                         then
 971                         (
 972                                 clear_local_git_env
 973                                 cd "$path"
 974                                 remote=$(get_default_remote)
 975                                 git config remote."$remote".url "$url"
 976                         )
 977                         fi
 978                 fi
 979         done
 980 }
 981
 982 # This loop parses the command line arguments to find the
 983 # subcommand name to dispatch.  Parsing of the subcommand specific
 984 # options are primarily done by the subcommand implementations.
 985 # Subcommand specific options such as --branch and --cached are
 986 # parsed here as well, for backward compatibility.
 987
 988 while test $# != 0 && test -z "$command"
 989 do
 990         case "$1" in
 991         add | foreach | init | update | status | summary | sync)
 992                 command=$1
 993                 ;;
 994         -q|--quiet)
 995                 GIT_QUIET=1
 996                 ;;
 997         -b|--branch)
 998                 case "$2" in
 999                 '')
1000                         usage
1001                         ;;
1002                 esac
1003                 branch="$2"; shift
1004                 ;;
1005         --cached)
1006                 cached="$1"
1007                 ;;
1008         --)
1009                 break
1010                 ;;
1011         -*)
1012                 usage
1013                 ;;
1014         *)
1015                 break
1016                 ;;
1017         esac
1018         shift
1019 done
1020
1021 # No command word defaults to "status"
1022 test -n "$command" || command=status
1023
1024 # "-b branch" is accepted only by "add"
1025 if test -n "$branch" && test "$command" != add
1026 then
1027         usage
1028 fi
1029
1030 # "--cached" is accepted only by "status" and "summary"
1031 if test -n "$cached" && test "$command" != status -a "$command" != summary
1032 then
1033         usage
1034 fi
1035
1036 "cmd_$command" "$@"