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_name=$(dirname "$name")
 136
 137         gitdir=$(git rev-parse --git-dir)
 138         gitdir_base="$gitdir/modules/$base_name"
 139         gitdir="$gitdir/modules/$name"
 140
 141         if test -d "$gitdir"
 142         then
 143                 mkdir -p "$path"
 144                 rm -f "$gitdir/index"
 145         else
 146                 mkdir -p "$gitdir_base"
 147                 git clone $quiet -n ${reference:+"$reference"} \
 148                         --separate-git-dir "$gitdir" "$url" "$path" ||
 149                 die "$(eval_gettext "Clone of '\$url' into submodule path '\$path' failed")"
 150         fi
 151
 152         a=$(cd "$gitdir" && pwd)/
 153         b=$(cd "$path" && pwd)/
 154         # normalize Windows-style absolute paths to POSIX-style absolute paths
 155         case $a in [a-zA-Z]:/*) a=/${a%%:*}${a#*:} ;; esac
 156         case $b in [a-zA-Z]:/*) b=/${b%%:*}${b#*:} ;; esac
 157         # Remove all common leading directories after a sanity check
 158         if test "${a#$b}" != "$a" || test "${b#$a}" != "$b"; then
 159                 die "$(eval_gettext "Gitdir '\$a' is part of the submodule path '\$b' or vice versa")"
 160         fi
 161         while test "${a%%/*}" = "${b%%/*}"
 162         do
 163                 a=${a#*/}
 164                 b=${b#*/}
 165         done
 166         # Now chop off the trailing '/'s that were added in the beginning
 167         a=${a%/}
 168         b=${b%/}
 169
 170         rel=$(echo $b | sed -e 's|[^/]*|..|g')
 171         echo "gitdir: $rel/$a" >"$path/.git"
 172
 173         rel=$(echo $a | sed -e 's|[^/]*|..|g')
 174         (clear_local_git_env; cd "$path" && GIT_WORK_TREE=. git config core.worktree "$rel/$b")
 175 }
 176
 177 #
 178 # Add a new submodule to the working tree, .gitmodules and the index
 179 #
 180 # $@ = repo path
 181 #
 182 # optional branch is stored in global branch variable
 183 #
 184 cmd_add()
 185 {
 186         # parse $args after "submodule ... add".
 187         while test $# -ne 0
 188         do
 189                 case "$1" in
 190                 -b | --branch)
 191                         case "$2" in '') usage ;; esac
 192                         branch=$2
 193                         shift
 194                         ;;
 195                 -f | --force)
 196                         force=$1
 197                         ;;
 198                 -q|--quiet)
 199                         GIT_QUIET=1
 200                         ;;
 201                 --reference)
 202                         case "$2" in '') usage ;; esac
 203                         reference="--reference=$2"
 204                         shift
 205                         ;;
 206                 --reference=*)
 207                         reference="$1"
 208                         shift
 209                         ;;
 210                 --)
 211                         shift
 212                         break
 213                         ;;
 214                 -*)
 215                         usage
 216                         ;;
 217                 *)
 218                         break
 219                         ;;
 220                 esac
 221                 shift
 222         done
 223
 224         repo=$1
 225         path=$2
 226
 227         if test -z "$path"; then
 228                 path=$(echo "$repo" |
 229                         sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
 230         fi
 231
 232         if test -z "$repo" -o -z "$path"; then
 233                 usage
 234         fi
 235
 236         # assure repo is absolute or relative to parent
 237         case "$repo" in
 238         ./*|../*)
 239                 # dereference source url relative to parent's url
 240                 realrepo=$(resolve_relative_url "$repo") || exit
 241                 ;;
 242         *:*|/*)
 243                 # absolute url
 244                 realrepo=$repo
 245                 ;;
 246         *)
 247                 die "$(eval_gettext "repo URL: '\$repo' must be absolute or begin with ./|../")"
 248         ;;
 249         esac
 250
 251         # normalize path:
 252         # multiple //; leading ./; /./; /../; trailing /
 253         path=$(printf '%s/\n' "$path" |
 254                 sed -e '
 255                         s|//*|/|g
 256                         s|^\(\./\)*||
 257                         s|/\./|/|g
 258                         :start
 259                         s|\([^/]*\)/\.\./||
 260                         tstart
 261                         s|/*$||
 262                 ')
 263         git ls-files --error-unmatch "$path" > /dev/null 2>&1 &&
 264         die "$(eval_gettext "'\$path' already exists in the index")"
 265
 266         if test -z "$force" && ! git add --dry-run --ignore-missing "$path" > /dev/null 2>&1
 267         then
 268                 eval_gettextln "The following path is ignored by one of your .gitignore files:
 269 \$path
 270 Use -f if you really want to add it." >&2
 271                 exit 1
 272         fi
 273
 274         # perhaps the path exists and is already a git repo, else clone it
 275         if test -e "$path"
 276         then
 277                 if test -d "$path"/.git -o -f "$path"/.git
 278                 then
 279                         eval_gettextln "Adding existing repo at '\$path' to the index"
 280                 else
 281                         die "$(eval_gettext "'\$path' already exists and is not a valid git repo")"
 282                 fi
 283
 284         else
 285
 286                 module_clone "$path" "$realrepo" "$reference" || exit
 287                 (
 288                         clear_local_git_env
 289                         cd "$path" &&
 290                         # ash fails to wordsplit ${branch:+-b "$branch"...}
 291                         case "$branch" in
 292                         '') git checkout -f -q ;;
 293                         ?*) git checkout -f -q -B "$branch" "origin/$branch" ;;
 294                         esac
 295                 ) || die "$(eval_gettext "Unable to checkout submodule '\$path'")"
 296         fi
 297         git config submodule."$path".url "$realrepo"
 298
 299         git add $force "$path" ||
 300         die "$(eval_gettext "Failed to add submodule '\$path'")"
 301
 302         git config -f .gitmodules submodule."$path".path "$path" &&
 303         git config -f .gitmodules submodule."$path".url "$repo" &&
 304         git add --force .gitmodules ||
 305         die "$(eval_gettext "Failed to register submodule '\$path'")"
 306 }
 307
 308 #
 309 # Execute an arbitrary command sequence in each checked out
 310 # submodule
 311 #
 312 # $@ = command to execute
 313 #
 314 cmd_foreach()
 315 {
 316         # parse $args after "submodule ... foreach".
 317         while test $# -ne 0
 318         do
 319                 case "$1" in
 320                 -q|--quiet)
 321                         GIT_QUIET=1
 322                         ;;
 323                 --recursive)
 324                         recursive=1
 325                         ;;
 326                 -*)
 327                         usage
 328                         ;;
 329                 *)
 330                         break
 331                         ;;
 332                 esac
 333                 shift
 334         done
 335
 336         toplevel=$(pwd)
 337
 338         # dup stdin so that it can be restored when running the external
 339         # command in the subshell (and a recursive call to this function)
 340         exec 3<&0
 341
 342         module_list |
 343         while read mode sha1 stage path
 344         do
 345                 if test -e "$path"/.git
 346                 then
 347                         say "$(eval_gettext "Entering '\$prefix\$path'")"
 348                         name=$(module_name "$path")
 349                         (
 350                                 prefix="$prefix$path/"
 351                                 clear_local_git_env
 352                                 cd "$path" &&
 353                                 eval "$@" &&
 354                                 if test -n "$recursive"
 355                                 then
 356                                         cmd_foreach "--recursive" "$@"
 357                                 fi
 358                         ) <&3 3<&- ||
 359                         die "$(eval_gettext "Stopping at '\$path'; script returned non-zero status.")"
 360                 fi
 361         done
 362 }
 363
 364 #
 365 # Register submodules in .git/config
 366 #
 367 # $@ = requested paths (default to all)
 368 #
 369 cmd_init()
 370 {
 371         # parse $args after "submodule ... init".
 372         while test $# -ne 0
 373         do
 374                 case "$1" in
 375                 -q|--quiet)
 376                         GIT_QUIET=1
 377                         ;;
 378                 --)
 379                         shift
 380                         break
 381                         ;;
 382                 -*)
 383                         usage
 384                         ;;
 385                 *)
 386                         break
 387                         ;;
 388                 esac
 389                 shift
 390         done
 391
 392         module_list "$@" |
 393         while read mode sha1 stage path
 394         do
 395                 # Skip already registered paths
 396                 name=$(module_name "$path") || exit
 397                 if test -z "$(git config "submodule.$name.url")"
 398                 then
 399                         url=$(git config -f .gitmodules submodule."$name".url)
 400                         test -z "$url" &&
 401                         die "$(eval_gettext "No url found for submodule path '\$path' in .gitmodules")"
 402
 403                         # Possibly a url relative to parent
 404                         case "$url" in
 405                         ./*|../*)
 406                                 url=$(resolve_relative_url "$url") || exit
 407                                 ;;
 408                         esac
 409                         git config submodule."$name".url "$url" ||
 410                         die "$(eval_gettext "Failed to register url for submodule path '\$path'")"
 411                 fi
 412
 413                 # Copy "update" setting when it is not set yet
 414                 upd="$(git config -f .gitmodules submodule."$name".update)"
 415                 test -z "$upd" ||
 416                 test -n "$(git config submodule."$name".update)" ||
 417                 git config submodule."$name".update "$upd" ||
 418                 die "$(eval_gettext "Failed to register update mode for submodule path '\$path'")"
 419
 420                 say "$(eval_gettext "Submodule '\$name' (\$url) registered for path '\$path'")"
 421         done
 422 }
 423
 424 #
 425 # Update each submodule path to correct revision, using clone and checkout as needed
 426 #
 427 # $@ = requested paths (default to all)
 428 #
 429 cmd_update()
 430 {
 431         # parse $args after "submodule ... update".
 432         orig_flags=
 433         while test $# -ne 0
 434         do
 435                 case "$1" in
 436                 -q|--quiet)
 437                         GIT_QUIET=1
 438                         ;;
 439                 -i|--init)
 440                         init=1
 441                         ;;
 442                 -N|--no-fetch)
 443                         nofetch=1
 444                         ;;
 445                 -f|--force)
 446                         force=$1
 447                         ;;
 448                 -r|--rebase)
 449                         update="rebase"
 450                         ;;
 451                 --reference)
 452                         case "$2" in '') usage ;; esac
 453                         reference="--reference=$2"
 454                         orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 455                         shift
 456                         ;;
 457                 --reference=*)
 458                         reference="$1"
 459                         ;;
 460                 -m|--merge)
 461                         update="merge"
 462                         ;;
 463                 --recursive)
 464                         recursive=1
 465                         ;;
 466                 --checkout)
 467                         update="checkout"
 468                         ;;
 469                 --)
 470                         shift
 471                         break
 472                         ;;
 473                 -*)
 474                         usage
 475                         ;;
 476                 *)
 477                         break
 478                         ;;
 479                 esac
 480                 orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 481                 shift
 482         done
 483
 484         if test -n "$init"
 485         then
 486                 cmd_init "--" "$@" || return
 487         fi
 488
 489         cloned_modules=
 490         module_list "$@" | {
 491         err=
 492         while read mode sha1 stage path
 493         do
 494                 if test "$stage" = U
 495                 then
 496                         echo >&2 "Skipping unmerged submodule $path"
 497                         continue
 498                 fi
 499                 name=$(module_name "$path") || exit
 500                 url=$(git config submodule."$name".url)
 501                 if ! test -z "$update"
 502                 then
 503                         update_module=$update
 504                 else
 505                         update_module=$(git config submodule."$name".update)
 506                 fi
 507
 508                 if test "$update_module" = "none"
 509                 then
 510                         echo "Skipping submodule '$path'"
 511                         continue
 512                 fi
 513
 514                 if test -z "$url"
 515                 then
 516                         # Only mention uninitialized submodules when its
 517                         # path have been specified
 518                         test "$#" != "0" &&
 519                         say "$(eval_gettext "Submodule path '\$path' not initialized
 520 Maybe you want to use 'update --init'?")"
 521                         continue
 522                 fi
 523
 524                 if ! test -d "$path"/.git -o -f "$path"/.git
 525                 then
 526                         module_clone "$path" "$url" "$reference"|| exit
 527                         cloned_modules="$cloned_modules;$name"
 528                         subsha1=
 529                 else
 530                         subsha1=$(clear_local_git_env; cd "$path" &&
 531                                 git rev-parse --verify HEAD) ||
 532                         die "$(eval_gettext "Unable to find current revision in submodule path '\$path'")"
 533                 fi
 534
 535                 if test "$subsha1" != "$sha1"
 536                 then
 537                         subforce=$force
 538                         # If we don't already have a -f flag and the submodule has never been checked out
 539                         if test -z "$subsha1" -a -z "$force"
 540                         then
 541                                 subforce="-f"
 542                         fi
 543
 544                         if test -z "$nofetch"
 545                         then
 546                                 # Run fetch only if $sha1 isn't present or it
 547                                 # is not reachable from a ref.
 548                                 (clear_local_git_env; cd "$path" &&
 549                                         ( (rev=$(git rev-list -n 1 $sha1 --not --all 2>/dev/null) &&
 550                                          test -z "$rev") || git-fetch)) ||
 551                                 die "$(eval_gettext "Unable to fetch in submodule path '\$path'")"
 552                         fi
 553
 554                         # Is this something we just cloned?
 555                         case ";$cloned_modules;" in
 556                         *";$name;"*)
 557                                 # then there is no local change to integrate
 558                                 update_module= ;;
 559                         esac
 560
 561                         must_die_on_failure=
 562                         case "$update_module" in
 563                         rebase)
 564                                 command="git rebase"
 565                                 die_msg="$(eval_gettext "Unable to rebase '\$sha1' in submodule path '\$path'")"
 566                                 say_msg="$(eval_gettext "Submodule path '\$path': rebased into '\$sha1'")"
 567                                 must_die_on_failure=yes
 568                                 ;;
 569                         merge)
 570                                 command="git merge"
 571                                 die_msg="$(eval_gettext "Unable to merge '\$sha1' in submodule path '\$path'")"
 572                                 say_msg="$(eval_gettext "Submodule path '\$path': merged in '\$sha1'")"
 573                                 must_die_on_failure=yes
 574                                 ;;
 575                         *)
 576                                 command="git checkout $subforce -q"
 577                                 die_msg="$(eval_gettext "Unable to checkout '\$sha1' in submodule path '\$path'")"
 578                                 say_msg="$(eval_gettext "Submodule path '\$path': checked out '\$sha1'")"
 579                                 ;;
 580                         esac
 581
 582                         if (clear_local_git_env; cd "$path" && $command "$sha1")
 583                         then
 584                                 say "$say_msg"
 585                         elif test -n "$must_die_on_failure"
 586                         then
 587                                 die_with_status 2 "$die_msg"
 588                         else
 589                                 err="${err};$die_msg"
 590                                 continue
 591                         fi
 592                 fi
 593
 594                 if test -n "$recursive"
 595                 then
 596                         (clear_local_git_env; cd "$path" && eval cmd_update "$orig_flags")
 597                         res=$?
 598                         if test $res -gt 0
 599                         then
 600                                 die_msg="$(eval_gettext "Failed to recurse into submodule path '\$path'")"
 601                                 if test $res -eq 1
 602                                 then
 603                                         err="${err};$die_msg"
 604                                         continue
 605                                 else
 606                                         die_with_status $res "$die_msg"
 607                                 fi
 608                         fi
 609                 fi
 610         done
 611
 612         if test -n "$err"
 613         then
 614                 OIFS=$IFS
 615                 IFS=';'
 616                 for e in $err
 617                 do
 618                         if test -n "$e"
 619                         then
 620                                 echo >&2 "$e"
 621                         fi
 622                 done
 623                 IFS=$OIFS
 624                 exit 1
 625         fi
 626         }
 627 }
 628
 629 set_name_rev () {
 630         revname=$( (
 631                 clear_local_git_env
 632                 cd "$1" && {
 633                         git describe "$2" 2>/dev/null ||
 634                         git describe --tags "$2" 2>/dev/null ||
 635                         git describe --contains "$2" 2>/dev/null ||
 636                         git describe --all --always "$2"
 637                 }
 638         ) )
 639         test -z "$revname" || revname=" ($revname)"
 640 }
 641 #
 642 # Show commit summary for submodules in index or working tree
 643 #
 644 # If '--cached' is given, show summary between index and given commit,
 645 # or between working tree and given commit
 646 #
 647 # $@ = [commit (default 'HEAD'),] requested paths (default all)
 648 #
 649 cmd_summary() {
 650         summary_limit=-1
 651         for_status=
 652         diff_cmd=diff-index
 653
 654         # parse $args after "submodule ... summary".
 655         while test $# -ne 0
 656         do
 657                 case "$1" in
 658                 --cached)
 659                         cached="$1"
 660                         ;;
 661                 --files)
 662                         files="$1"
 663                         ;;
 664                 --for-status)
 665                         for_status="$1"
 666                         ;;
 667                 -n|--summary-limit)
 668                         if summary_limit=$(($2 + 0)) 2>/dev/null && test "$summary_limit" = "$2"
 669                         then
 670                                 :
 671                         else
 672                                 usage
 673                         fi
 674                         shift
 675                         ;;
 676                 --)
 677                         shift
 678                         break
 679                         ;;
 680                 -*)
 681                         usage
 682                         ;;
 683                 *)
 684                         break
 685                         ;;
 686                 esac
 687                 shift
 688         done
 689
 690         test $summary_limit = 0 && return
 691
 692         if rev=$(git rev-parse -q --verify --default HEAD ${1+"$1"})
 693         then
 694                 head=$rev
 695                 test $# = 0 || shift
 696         elif test -z "$1" -o "$1" = "HEAD"
 697         then
 698                 # before the first commit: compare with an empty tree
 699                 head=$(git hash-object -w -t tree --stdin </dev/null)
 700                 test -z "$1" || shift
 701         else
 702                 head="HEAD"
 703         fi
 704
 705         if [ -n "$files" ]
 706         then
 707                 test -n "$cached" &&
 708                 die "$(gettext -- "--cached cannot be used with --files")"
 709                 diff_cmd=diff-files
 710                 head=
 711         fi
 712
 713         cd_to_toplevel
 714         # Get modified modules cared by user
 715         modules=$(git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- "$@" |
 716                 sane_egrep '^:([0-7]* )?160000' |
 717                 while read mod_src mod_dst sha1_src sha1_dst status name
 718                 do
 719                         # Always show modules deleted or type-changed (blob<->module)
 720                         test $status = D -o $status = T && echo "$name" && continue
 721                         # Also show added or modified modules which are checked out
 722                         GIT_DIR="$name/.git" git-rev-parse --git-dir >/dev/null 2>&1 &&
 723                         echo "$name"
 724                 done
 725         )
 726
 727         test -z "$modules" && return
 728
 729         git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- $modules |
 730         sane_egrep '^:([0-7]* )?160000' |
 731         cut -c2- |
 732         while read mod_src mod_dst sha1_src sha1_dst status name
 733         do
 734                 if test -z "$cached" &&
 735                         test $sha1_dst = 0000000000000000000000000000000000000000
 736                 then
 737                         case "$mod_dst" in
 738                         160000)
 739                                 sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
 740                                 ;;
 741                         100644 | 100755 | 120000)
 742                                 sha1_dst=$(git hash-object $name)
 743                                 ;;
 744                         000000)
 745                                 ;; # removed
 746                         *)
 747                                 # unexpected type
 748                                 eval_gettextln "unexpected mode \$mod_dst" >&2
 749                                 continue ;;
 750                         esac
 751                 fi
 752                 missing_src=
 753                 missing_dst=
 754
 755                 test $mod_src = 160000 &&
 756                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_src^0 >/dev/null &&
 757                 missing_src=t
 758
 759                 test $mod_dst = 160000 &&
 760                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_dst^0 >/dev/null &&
 761                 missing_dst=t
 762
 763                 total_commits=
 764                 case "$missing_src,$missing_dst" in
 765                 t,)
 766                         errmsg="$(eval_gettext "  Warn: \$name doesn't contain commit \$sha1_src")"
 767                         ;;
 768                 ,t)
 769                         errmsg="$(eval_gettext "  Warn: \$name doesn't contain commit \$sha1_dst")"
 770                         ;;
 771                 t,t)
 772                         errmsg="$(eval_gettext "  Warn: \$name doesn't contain commits \$sha1_src and \$sha1_dst")"
 773                         ;;
 774                 *)
 775                         errmsg=
 776                         total_commits=$(
 777                         if test $mod_src = 160000 -a $mod_dst = 160000
 778                         then
 779                                 range="$sha1_src...$sha1_dst"
 780                         elif test $mod_src = 160000
 781                         then
 782                                 range=$sha1_src
 783                         else
 784                                 range=$sha1_dst
 785                         fi
 786                         GIT_DIR="$name/.git" \
 787                         git rev-list --first-parent $range -- | wc -l
 788                         )
 789                         total_commits=" ($(($total_commits + 0)))"
 790                         ;;
 791                 esac
 792
 793                 sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
 794                 sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
 795                 if test $status = T
 796                 then
 797                         blob="$(gettext "blob")"
 798                         submodule="$(gettext "submodule")"
 799                         if test $mod_dst = 160000
 800                         then
 801                                 echo "* $name $sha1_abbr_src($blob)->$sha1_abbr_dst($submodule)$total_commits:"
 802                         else
 803                                 echo "* $name $sha1_abbr_src($submodule)->$sha1_abbr_dst($blob)$total_commits:"
 804                         fi
 805                 else
 806                         echo "* $name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
 807                 fi
 808                 if test -n "$errmsg"
 809                 then
 810                         # Don't give error msg for modification whose dst is not submodule
 811                         # i.e. deleted or changed to blob
 812                         test $mod_dst = 160000 && echo "$errmsg"
 813                 else
 814                         if test $mod_src = 160000 -a $mod_dst = 160000
 815                         then
 816                                 limit=
 817                                 test $summary_limit -gt 0 && limit="-$summary_limit"
 818                                 GIT_DIR="$name/.git" \
 819                                 git log $limit --pretty='format:  %m %s' \
 820                                 --first-parent $sha1_src...$sha1_dst
 821                         elif test $mod_dst = 160000
 822                         then
 823                                 GIT_DIR="$name/.git" \
 824                                 git log --pretty='format:  > %s' -1 $sha1_dst
 825                         else
 826                                 GIT_DIR="$name/.git" \
 827                                 git log --pretty='format:  < %s' -1 $sha1_src
 828                         fi
 829                         echo
 830                 fi
 831                 echo
 832         done |
 833         if test -n "$for_status"; then
 834                 if [ -n "$files" ]; then
 835                         gettextln "# Submodules changed but not updated:"
 836                 else
 837                         gettextln "# Submodule changes to be committed:"
 838                 fi
 839                 echo "#"
 840                 sed -e 's|^|# |' -e 's|^# $|#|'
 841         else
 842                 cat
 843         fi
 844 }
 845 #
 846 # List all submodules, prefixed with:
 847 #  - submodule not initialized
 848 #  + different revision checked out
 849 #
 850 # If --cached was specified the revision in the index will be printed
 851 # instead of the currently checked out revision.
 852 #
 853 # $@ = requested paths (default to all)
 854 #
 855 cmd_status()
 856 {
 857         # parse $args after "submodule ... status".
 858         orig_flags=
 859         while test $# -ne 0
 860         do
 861                 case "$1" in
 862                 -q|--quiet)
 863                         GIT_QUIET=1
 864                         ;;
 865                 --cached)
 866                         cached=1
 867                         ;;
 868                 --recursive)
 869                         recursive=1
 870                         ;;
 871                 --)
 872                         shift
 873                         break
 874                         ;;
 875                 -*)
 876                         usage
 877                         ;;
 878                 *)
 879                         break
 880                         ;;
 881                 esac
 882                 orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 883                 shift
 884         done
 885
 886         module_list "$@" |
 887         while read mode sha1 stage path
 888         do
 889                 name=$(module_name "$path") || exit
 890                 url=$(git config submodule."$name".url)
 891                 displaypath="$prefix$path"
 892                 if test "$stage" = U
 893                 then
 894                         say "U$sha1 $displaypath"
 895                         continue
 896                 fi
 897                 if test -z "$url" || ! test -d "$path"/.git -o -f "$path"/.git
 898                 then
 899                         say "-$sha1 $displaypath"
 900                         continue;
 901                 fi
 902                 set_name_rev "$path" "$sha1"
 903                 if git diff-files --ignore-submodules=dirty --quiet -- "$path"
 904                 then
 905                         say " $sha1 $displaypath$revname"
 906                 else
 907                         if test -z "$cached"
 908                         then
 909                                 sha1=$(clear_local_git_env; cd "$path" && git rev-parse --verify HEAD)
 910                                 set_name_rev "$path" "$sha1"
 911                         fi
 912                         say "+$sha1 $displaypath$revname"
 913                 fi
 914
 915                 if test -n "$recursive"
 916                 then
 917                         (
 918                                 prefix="$displaypath/"
 919                                 clear_local_git_env
 920                                 cd "$path" &&
 921                                 eval cmd_status "$orig_args"
 922                         ) ||
 923                         die "$(eval_gettext "Failed to recurse into submodule path '\$path'")"
 924                 fi
 925         done
 926 }
 927 #
 928 # Sync remote urls for submodules
 929 # This makes the value for remote.$remote.url match the value
 930 # specified in .gitmodules.
 931 #
 932 cmd_sync()
 933 {
 934         while test $# -ne 0
 935         do
 936                 case "$1" in
 937                 -q|--quiet)
 938                         GIT_QUIET=1
 939                         shift
 940                         ;;
 941                 --)
 942                         shift
 943                         break
 944                         ;;
 945                 -*)
 946                         usage
 947                         ;;
 948                 *)
 949                         break
 950                         ;;
 951                 esac
 952         done
 953         cd_to_toplevel
 954         module_list "$@" |
 955         while read mode sha1 stage path
 956         do
 957                 name=$(module_name "$path")
 958                 url=$(git config -f .gitmodules --get submodule."$name".url)
 959
 960                 # Possibly a url relative to parent
 961                 case "$url" in
 962                 ./*|../*)
 963                         url=$(resolve_relative_url "$url") || exit
 964                         ;;
 965                 esac
 966
 967                 if git config "submodule.$name.url" >/dev/null 2>/dev/null
 968                 then
 969                         say "$(eval_gettext "Synchronizing submodule url for '\$name'")"
 970                         git config submodule."$name".url "$url"
 971
 972                         if test -e "$path"/.git
 973                         then
 974                         (
 975                                 clear_local_git_env
 976                                 cd "$path"
 977                                 remote=$(get_default_remote)
 978                                 git config remote."$remote".url "$url"
 979                         )
 980                         fi
 981                 fi
 982         done
 983 }
 984
 985 # This loop parses the command line arguments to find the
 986 # subcommand name to dispatch.  Parsing of the subcommand specific
 987 # options are primarily done by the subcommand implementations.
 988 # Subcommand specific options such as --branch and --cached are
 989 # parsed here as well, for backward compatibility.
 990
 991 while test $# != 0 && test -z "$command"
 992 do
 993         case "$1" in
 994         add | foreach | init | update | status | summary | sync)
 995                 command=$1
 996                 ;;
 997         -q|--quiet)
 998                 GIT_QUIET=1
 999                 ;;
1000         -b|--branch)
1001                 case "$2" in
1002                 '')
1003                         usage
1004                         ;;
1005                 esac
1006                 branch="$2"; shift
1007                 ;;
1008         --cached)
1009                 cached="$1"
1010                 ;;
1011         --)
1012                 break
1013                 ;;
1014         -*)
1015                 usage
1016                 ;;
1017         *)
1018                 break
1019                 ;;
1020         esac
1021         shift
1022 done
1023
1024 # No command word defaults to "status"
1025 test -n "$command" || command=status
1026
1027 # "-b branch" is accepted only by "add"
1028 if test -n "$branch" && test "$command" != add
1029 then
1030         usage
1031 fi
1032
1033 # "--cached" is accepted only by "status" and "summary"
1034 if test -n "$cached" && test "$command" != status -a "$command" != summary
1035 then
1036         usage
1037 fi
1038
1039 "cmd_$command" "$@"