git-submodule.sh

   1 #!/bin/sh
   2 #
   3 # git-submodule.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] [--name <name>] [--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: $dashless [--quiet] sync [--recursive] [--] [<path>...]"
  15 OPTIONS_SPEC=
  16 . git-sh-setup
  17 . git-sh-i18n
  18 . git-parse-remote
  19 require_work_tree
  20
  21 command=
  22 branch=
  23 force=
  24 reference=
  25 cached=
  26 recursive=
  27 init=
  28 files=
  29 nofetch=
  30 update=
  31 prefix=
  32 custom_name=
  33
  34 # The function takes at most 2 arguments. The first argument is the
  35 # URL that navigates to the submodule origin repo. When relative, this URL
  36 # is relative to the superproject origin URL repo. The second up_path
  37 # argument, if specified, is the relative path that navigates
  38 # from the submodule working tree to the superproject working tree.
  39 #
  40 # The output of the function is the origin URL of the submodule.
  41 #
  42 # The output will either be an absolute URL or filesystem path (if the
  43 # superproject origin URL is an absolute URL or filesystem path,
  44 # respectively) or a relative file system path (if the superproject
  45 # origin URL is a relative file system path).
  46 #
  47 # When the output is a relative file system path, the path is either
  48 # relative to the submodule working tree, if up_path is specified, or to
  49 # the superproject working tree otherwise.
  50 resolve_relative_url ()
  51 {
  52         remote=$(get_default_remote)
  53         remoteurl=$(git config "remote.$remote.url") ||
  54                 remoteurl=$(pwd) # the repository is its own authoritative upstream
  55         url="$1"
  56         remoteurl=${remoteurl%/}
  57         sep=/
  58         up_path="$2"
  59
  60         case "$remoteurl" in
  61         *:*|/*)
  62                 is_relative=
  63                 ;;
  64         ./*|../*)
  65                 is_relative=t
  66                 ;;
  67         *)
  68                 is_relative=t
  69                 remoteurl="./$remoteurl"
  70                 ;;
  71         esac
  72
  73         while test -n "$url"
  74         do
  75                 case "$url" in
  76                 ../*)
  77                         url="${url#../}"
  78                         case "$remoteurl" in
  79                         */*)
  80                                 remoteurl="${remoteurl%/*}"
  81                                 ;;
  82                         *:*)
  83                                 remoteurl="${remoteurl%:*}"
  84                                 sep=:
  85                                 ;;
  86                         *)
  87                                 if test -z "$is_relative" || test "." = "$remoteurl"
  88                                 then
  89                                         die "$(eval_gettext "cannot strip one component off url '\$remoteurl'")"
  90                                 else
  91                                         remoteurl=.
  92                                 fi
  93                                 ;;
  94                         esac
  95                         ;;
  96                 ./*)
  97                         url="${url#./}"
  98                         ;;
  99                 *)
 100                         break;;
 101                 esac
 102         done
 103         remoteurl="$remoteurl$sep${url%/}"
 104         echo "${is_relative:+${up_path}}${remoteurl#./}"
 105 }
 106
 107 #
 108 # Get submodule info for registered submodules
 109 # $@ = path to limit submodule list
 110 #
 111 module_list()
 112 {
 113         (
 114                 git ls-files --error-unmatch --stage -- "$@" ||
 115                 echo "unmatched pathspec exists"
 116         ) |
 117         perl -e '
 118         my %unmerged = ();
 119         my ($null_sha1) = ("0" x 40);
 120         my @out = ();
 121         my $unmatched = 0;
 122         while (<STDIN>) {
 123                 if (/^unmatched pathspec/) {
 124                         $unmatched = 1;
 125                         next;
 126                 }
 127                 chomp;
 128                 my ($mode, $sha1, $stage, $path) =
 129                         /^([0-7]+) ([0-9a-f]{40}) ([0-3])\t(.*)$/;
 130                 next unless $mode eq "160000";
 131                 if ($stage ne "0") {
 132                         if (!$unmerged{$path}++) {
 133                                 push @out, "$mode $null_sha1 U\t$path\n";
 134                         }
 135                         next;
 136                 }
 137                 push @out, "$_\n";
 138         }
 139         if ($unmatched) {
 140                 print "#unmatched\n";
 141         } else {
 142                 print for (@out);
 143         }
 144         '
 145 }
 146
 147 die_if_unmatched ()
 148 {
 149         if test "$1" = "#unmatched"
 150         then
 151                 exit 1
 152         fi
 153 }
 154
 155 #
 156 # Map submodule path to submodule name
 157 #
 158 # $1 = path
 159 #
 160 module_name()
 161 {
 162         # Do we have "submodule.<something>.path = $1" defined in .gitmodules file?
 163         sm_path="$1"
 164         re=$(printf '%s\n' "$1" | sed -e 's/[].[^$\\*]/\\&/g')
 165         name=$( git config -f .gitmodules --get-regexp '^submodule\..*\.path$' |
 166                 sed -n -e 's|^submodule\.\(.*\)\.path '"$re"'$|\1|p' )
 167         test -z "$name" &&
 168         die "$(eval_gettext "No submodule mapping found in .gitmodules for path '\$sm_path'")"
 169         echo "$name"
 170 }
 171
 172 #
 173 # Clone a submodule
 174 #
 175 # Prior to calling, cmd_update checks that a possibly existing
 176 # path is not a git repository.
 177 # Likewise, cmd_add checks that path does not exist at all,
 178 # since it is the location of a new submodule.
 179 #
 180 module_clone()
 181 {
 182         sm_path=$1
 183         name=$2
 184         url=$3
 185         reference="$4"
 186         quiet=
 187         if test -n "$GIT_QUIET"
 188         then
 189                 quiet=-q
 190         fi
 191
 192         gitdir=
 193         gitdir_base=
 194         base_name=$(dirname "$name")
 195
 196         gitdir=$(git rev-parse --git-dir)
 197         gitdir_base="$gitdir/modules/$base_name"
 198         gitdir="$gitdir/modules/$name"
 199
 200         if test -d "$gitdir"
 201         then
 202                 mkdir -p "$sm_path"
 203                 rm -f "$gitdir/index"
 204         else
 205                 mkdir -p "$gitdir_base"
 206                 (
 207                         clear_local_git_env
 208                         git clone $quiet -n ${reference:+"$reference"} \
 209                                 --separate-git-dir "$gitdir" "$url" "$sm_path"
 210                 ) ||
 211                 die "$(eval_gettext "Clone of '\$url' into submodule path '\$sm_path' failed")"
 212         fi
 213
 214         # We already are at the root of the work tree but cd_to_toplevel will
 215         # resolve any symlinks that might be present in $PWD
 216         a=$(cd_to_toplevel && cd "$gitdir" && pwd)/
 217         b=$(cd_to_toplevel && cd "$sm_path" && pwd)/
 218         # Remove all common leading directories after a sanity check
 219         if test "${a#$b}" != "$a" || test "${b#$a}" != "$b"; then
 220                 die "$(eval_gettext "Gitdir '\$a' is part of the submodule path '\$b' or vice versa")"
 221         fi
 222         while test "${a%%/*}" = "${b%%/*}"
 223         do
 224                 a=${a#*/}
 225                 b=${b#*/}
 226         done
 227         # Now chop off the trailing '/'s that were added in the beginning
 228         a=${a%/}
 229         b=${b%/}
 230
 231         # Turn each leading "*/" component into "../"
 232         rel=$(echo $b | sed -e 's|[^/][^/]*|..|g')
 233         echo "gitdir: $rel/$a" >"$sm_path/.git"
 234
 235         rel=$(echo $a | sed -e 's|[^/][^/]*|..|g')
 236         (clear_local_git_env; cd "$sm_path" && GIT_WORK_TREE=. git config core.worktree "$rel/$b")
 237 }
 238
 239 #
 240 # Add a new submodule to the working tree, .gitmodules and the index
 241 #
 242 # $@ = repo path
 243 #
 244 # optional branch is stored in global branch variable
 245 #
 246 cmd_add()
 247 {
 248         # parse $args after "submodule ... add".
 249         while test $# -ne 0
 250         do
 251                 case "$1" in
 252                 -b | --branch)
 253                         case "$2" in '') usage ;; esac
 254                         branch=$2
 255                         shift
 256                         ;;
 257                 -f | --force)
 258                         force=$1
 259                         ;;
 260                 -q|--quiet)
 261                         GIT_QUIET=1
 262                         ;;
 263                 --reference)
 264                         case "$2" in '') usage ;; esac
 265                         reference="--reference=$2"
 266                         shift
 267                         ;;
 268                 --reference=*)
 269                         reference="$1"
 270                         ;;
 271                 --name)
 272                         case "$2" in '') usage ;; esac
 273                         custom_name=$2
 274                         shift
 275                         ;;
 276                 --)
 277                         shift
 278                         break
 279                         ;;
 280                 -*)
 281                         usage
 282                         ;;
 283                 *)
 284                         break
 285                         ;;
 286                 esac
 287                 shift
 288         done
 289
 290         repo=$1
 291         sm_path=$2
 292
 293         if test -z "$sm_path"; then
 294                 sm_path=$(echo "$repo" |
 295                         sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
 296         fi
 297
 298         if test -z "$repo" -o -z "$sm_path"; then
 299                 usage
 300         fi
 301
 302         # assure repo is absolute or relative to parent
 303         case "$repo" in
 304         ./*|../*)
 305                 # dereference source url relative to parent's url
 306                 realrepo=$(resolve_relative_url "$repo") || exit
 307                 ;;
 308         *:*|/*)
 309                 # absolute url
 310                 realrepo=$repo
 311                 ;;
 312         *)
 313                 die "$(eval_gettext "repo URL: '\$repo' must be absolute or begin with ./|../")"
 314         ;;
 315         esac
 316
 317         # normalize path:
 318         # multiple //; leading ./; /./; /../; trailing /
 319         sm_path=$(printf '%s/\n' "$sm_path" |
 320                 sed -e '
 321                         s|//*|/|g
 322                         s|^\(\./\)*||
 323                         s|/\./|/|g
 324                         :start
 325                         s|\([^/]*\)/\.\./||
 326                         tstart
 327                         s|/*$||
 328                 ')
 329         git ls-files --error-unmatch "$sm_path" > /dev/null 2>&1 &&
 330         die "$(eval_gettext "'\$sm_path' already exists in the index")"
 331
 332         if test -z "$force" && ! git add --dry-run --ignore-missing "$sm_path" > /dev/null 2>&1
 333         then
 334                 eval_gettextln "The following path is ignored by one of your .gitignore files:
 335 \$sm_path
 336 Use -f if you really want to add it." >&2
 337                 exit 1
 338         fi
 339
 340         if test -n "$custom_name"
 341         then
 342                 sm_name="$custom_name"
 343         else
 344                 sm_name="$sm_path"
 345         fi
 346
 347         # perhaps the path exists and is already a git repo, else clone it
 348         if test -e "$sm_path"
 349         then
 350                 if test -d "$sm_path"/.git -o -f "$sm_path"/.git
 351                 then
 352                         eval_gettextln "Adding existing repo at '\$sm_path' to the index"
 353                 else
 354                         die "$(eval_gettext "'\$sm_path' already exists and is not a valid git repo")"
 355                 fi
 356
 357         else
 358                 if test -d ".git/modules/$sm_name"
 359                 then
 360                         if test -z "$force"
 361                         then
 362                                 echo >&2 "$(eval_gettext "A git directory for '\$sm_name' is found locally with remote(s):")"
 363                                 GIT_DIR=".git/modules/$sm_name" GIT_WORK_TREE=. git remote -v | grep '(fetch)' | sed -e s,^,"  ", -e s,' (fetch)',, >&2
 364                                 echo >&2 "$(eval_gettext "If you want to reuse this local git directory instead of cloning again from")"
 365                                 echo >&2 "  $realrepo"
 366                                 echo >&2 "$(eval_gettext "use the '--force' option. If the local git directory is not the correct repo")"
 367                                 die "$(eval_gettext "or you are unsure what this means choose another name with the '--name' option.")"
 368                         else
 369                                 echo "$(eval_gettext "Reactivating local git directory for submodule '\$sm_name'.")"
 370                         fi
 371                 fi
 372                 module_clone "$sm_path" "$sm_name" "$realrepo" "$reference" || exit
 373                 (
 374                         clear_local_git_env
 375                         cd "$sm_path" &&
 376                         # ash fails to wordsplit ${branch:+-b "$branch"...}
 377                         case "$branch" in
 378                         '') git checkout -f -q ;;
 379                         ?*) git checkout -f -q -B "$branch" "origin/$branch" ;;
 380                         esac
 381                 ) || die "$(eval_gettext "Unable to checkout submodule '\$sm_path'")"
 382         fi
 383         git config submodule."$sm_name".url "$realrepo"
 384
 385         git add $force "$sm_path" ||
 386         die "$(eval_gettext "Failed to add submodule '\$sm_path'")"
 387
 388         git config -f .gitmodules submodule."$sm_name".path "$sm_path" &&
 389         git config -f .gitmodules submodule."$sm_name".url "$repo" &&
 390         git add --force .gitmodules ||
 391         die "$(eval_gettext "Failed to register submodule '\$sm_path'")"
 392 }
 393
 394 #
 395 # Execute an arbitrary command sequence in each checked out
 396 # submodule
 397 #
 398 # $@ = command to execute
 399 #
 400 cmd_foreach()
 401 {
 402         # parse $args after "submodule ... foreach".
 403         while test $# -ne 0
 404         do
 405                 case "$1" in
 406                 -q|--quiet)
 407                         GIT_QUIET=1
 408                         ;;
 409                 --recursive)
 410                         recursive=1
 411                         ;;
 412                 -*)
 413                         usage
 414                         ;;
 415                 *)
 416                         break
 417                         ;;
 418                 esac
 419                 shift
 420         done
 421
 422         toplevel=$(pwd)
 423
 424         # dup stdin so that it can be restored when running the external
 425         # command in the subshell (and a recursive call to this function)
 426         exec 3<&0
 427
 428         module_list |
 429         while read mode sha1 stage sm_path
 430         do
 431                 die_if_unmatched "$mode"
 432                 if test -e "$sm_path"/.git
 433                 then
 434                         say "$(eval_gettext "Entering '\$prefix\$sm_path'")"
 435                         name=$(module_name "$sm_path")
 436                         (
 437                                 prefix="$prefix$sm_path/"
 438                                 clear_local_git_env
 439                                 # we make $path available to scripts ...
 440                                 path=$sm_path
 441                                 cd "$sm_path" &&
 442                                 eval "$@" &&
 443                                 if test -n "$recursive"
 444                                 then
 445                                         cmd_foreach "--recursive" "$@"
 446                                 fi
 447                         ) <&3 3<&- ||
 448                         die "$(eval_gettext "Stopping at '\$sm_path'; script returned non-zero status.")"
 449                 fi
 450         done
 451 }
 452
 453 #
 454 # Register submodules in .git/config
 455 #
 456 # $@ = requested paths (default to all)
 457 #
 458 cmd_init()
 459 {
 460         # parse $args after "submodule ... init".
 461         while test $# -ne 0
 462         do
 463                 case "$1" in
 464                 -q|--quiet)
 465                         GIT_QUIET=1
 466                         ;;
 467                 --)
 468                         shift
 469                         break
 470                         ;;
 471                 -*)
 472                         usage
 473                         ;;
 474                 *)
 475                         break
 476                         ;;
 477                 esac
 478                 shift
 479         done
 480
 481         module_list "$@" |
 482         while read mode sha1 stage sm_path
 483         do
 484                 die_if_unmatched "$mode"
 485                 name=$(module_name "$sm_path") || exit
 486
 487                 # Copy url setting when it is not set yet
 488                 if test -z "$(git config "submodule.$name.url")"
 489                 then
 490                         url=$(git config -f .gitmodules submodule."$name".url)
 491                         test -z "$url" &&
 492                         die "$(eval_gettext "No url found for submodule path '\$sm_path' in .gitmodules")"
 493
 494                         # Possibly a url relative to parent
 495                         case "$url" in
 496                         ./*|../*)
 497                                 url=$(resolve_relative_url "$url") || exit
 498                                 ;;
 499                         esac
 500                         git config submodule."$name".url "$url" ||
 501                         die "$(eval_gettext "Failed to register url for submodule path '\$sm_path'")"
 502
 503                         say "$(eval_gettext "Submodule '\$name' (\$url) registered for path '\$sm_path'")"
 504                 fi
 505
 506                 # Copy "update" setting when it is not set yet
 507                 upd="$(git config -f .gitmodules submodule."$name".update)"
 508                 test -z "$upd" ||
 509                 test -n "$(git config submodule."$name".update)" ||
 510                 git config submodule."$name".update "$upd" ||
 511                 die "$(eval_gettext "Failed to register update mode for submodule path '\$sm_path'")"
 512         done
 513 }
 514
 515 #
 516 # Update each submodule path to correct revision, using clone and checkout as needed
 517 #
 518 # $@ = requested paths (default to all)
 519 #
 520 cmd_update()
 521 {
 522         # parse $args after "submodule ... update".
 523         orig_flags=
 524         while test $# -ne 0
 525         do
 526                 case "$1" in
 527                 -q|--quiet)
 528                         GIT_QUIET=1
 529                         ;;
 530                 -i|--init)
 531                         init=1
 532                         ;;
 533                 -N|--no-fetch)
 534                         nofetch=1
 535                         ;;
 536                 -f|--force)
 537                         force=$1
 538                         ;;
 539                 -r|--rebase)
 540                         update="rebase"
 541                         ;;
 542                 --reference)
 543                         case "$2" in '') usage ;; esac
 544                         reference="--reference=$2"
 545                         orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 546                         shift
 547                         ;;
 548                 --reference=*)
 549                         reference="$1"
 550                         ;;
 551                 -m|--merge)
 552                         update="merge"
 553                         ;;
 554                 --recursive)
 555                         recursive=1
 556                         ;;
 557                 --checkout)
 558                         update="checkout"
 559                         ;;
 560                 --)
 561                         shift
 562                         break
 563                         ;;
 564                 -*)
 565                         usage
 566                         ;;
 567                 *)
 568                         break
 569                         ;;
 570                 esac
 571                 orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 572                 shift
 573         done
 574
 575         if test -n "$init"
 576         then
 577                 cmd_init "--" "$@" || return
 578         fi
 579
 580         cloned_modules=
 581         module_list "$@" | {
 582         err=
 583         while read mode sha1 stage sm_path
 584         do
 585                 die_if_unmatched "$mode"
 586                 if test "$stage" = U
 587                 then
 588                         echo >&2 "Skipping unmerged submodule $sm_path"
 589                         continue
 590                 fi
 591                 name=$(module_name "$sm_path") || exit
 592                 url=$(git config submodule."$name".url)
 593                 if ! test -z "$update"
 594                 then
 595                         update_module=$update
 596                 else
 597                         update_module=$(git config submodule."$name".update)
 598                 fi
 599
 600                 if test "$update_module" = "none"
 601                 then
 602                         echo "Skipping submodule '$sm_path'"
 603                         continue
 604                 fi
 605
 606                 if test -z "$url"
 607                 then
 608                         # Only mention uninitialized submodules when its
 609                         # path have been specified
 610                         test "$#" != "0" &&
 611                         say "$(eval_gettext "Submodule path '\$sm_path' not initialized
 612 Maybe you want to use 'update --init'?")"
 613                         continue
 614                 fi
 615
 616                 if ! test -d "$sm_path"/.git -o -f "$sm_path"/.git
 617                 then
 618                         module_clone "$sm_path" "$name" "$url" "$reference" || exit
 619                         cloned_modules="$cloned_modules;$name"
 620                         subsha1=
 621                 else
 622                         subsha1=$(clear_local_git_env; cd "$sm_path" &&
 623                                 git rev-parse --verify HEAD) ||
 624                         die "$(eval_gettext "Unable to find current revision in submodule path '\$sm_path'")"
 625                 fi
 626
 627                 if test "$subsha1" != "$sha1" -o -n "$force"
 628                 then
 629                         subforce=$force
 630                         # If we don't already have a -f flag and the submodule has never been checked out
 631                         if test -z "$subsha1" -a -z "$force"
 632                         then
 633                                 subforce="-f"
 634                         fi
 635
 636                         if test -z "$nofetch"
 637                         then
 638                                 # Run fetch only if $sha1 isn't present or it
 639                                 # is not reachable from a ref.
 640                                 (clear_local_git_env; cd "$sm_path" &&
 641                                         ( (rev=$(git rev-list -n 1 $sha1 --not --all 2>/dev/null) &&
 642                                          test -z "$rev") || git-fetch)) ||
 643                                 die "$(eval_gettext "Unable to fetch in submodule path '\$sm_path'")"
 644                         fi
 645
 646                         # Is this something we just cloned?
 647                         case ";$cloned_modules;" in
 648                         *";$name;"*)
 649                                 # then there is no local change to integrate
 650                                 update_module= ;;
 651                         esac
 652
 653                         must_die_on_failure=
 654                         case "$update_module" in
 655                         rebase)
 656                                 command="git rebase"
 657                                 die_msg="$(eval_gettext "Unable to rebase '\$sha1' in submodule path '\$sm_path'")"
 658                                 say_msg="$(eval_gettext "Submodule path '\$sm_path': rebased into '\$sha1'")"
 659                                 must_die_on_failure=yes
 660                                 ;;
 661                         merge)
 662                                 command="git merge"
 663                                 die_msg="$(eval_gettext "Unable to merge '\$sha1' in submodule path '\$sm_path'")"
 664                                 say_msg="$(eval_gettext "Submodule path '\$sm_path': merged in '\$sha1'")"
 665                                 must_die_on_failure=yes
 666                                 ;;
 667                         *)
 668                                 command="git checkout $subforce -q"
 669                                 die_msg="$(eval_gettext "Unable to checkout '\$sha1' in submodule path '\$sm_path'")"
 670                                 say_msg="$(eval_gettext "Submodule path '\$sm_path': checked out '\$sha1'")"
 671                                 ;;
 672                         esac
 673
 674                         if (clear_local_git_env; cd "$sm_path" && $command "$sha1")
 675                         then
 676                                 say "$say_msg"
 677                         elif test -n "$must_die_on_failure"
 678                         then
 679                                 die_with_status 2 "$die_msg"
 680                         else
 681                                 err="${err};$die_msg"
 682                                 continue
 683                         fi
 684                 fi
 685
 686                 if test -n "$recursive"
 687                 then
 688                         (clear_local_git_env; cd "$sm_path" && eval cmd_update "$orig_flags")
 689                         res=$?
 690                         if test $res -gt 0
 691                         then
 692                                 die_msg="$(eval_gettext "Failed to recurse into submodule path '\$sm_path'")"
 693                                 if test $res -eq 1
 694                                 then
 695                                         err="${err};$die_msg"
 696                                         continue
 697                                 else
 698                                         die_with_status $res "$die_msg"
 699                                 fi
 700                         fi
 701                 fi
 702         done
 703
 704         if test -n "$err"
 705         then
 706                 OIFS=$IFS
 707                 IFS=';'
 708                 for e in $err
 709                 do
 710                         if test -n "$e"
 711                         then
 712                                 echo >&2 "$e"
 713                         fi
 714                 done
 715                 IFS=$OIFS
 716                 exit 1
 717         fi
 718         }
 719 }
 720
 721 set_name_rev () {
 722         revname=$( (
 723                 clear_local_git_env
 724                 cd "$1" && {
 725                         git describe "$2" 2>/dev/null ||
 726                         git describe --tags "$2" 2>/dev/null ||
 727                         git describe --contains "$2" 2>/dev/null ||
 728                         git describe --all --always "$2"
 729                 }
 730         ) )
 731         test -z "$revname" || revname=" ($revname)"
 732 }
 733 #
 734 # Show commit summary for submodules in index or working tree
 735 #
 736 # If '--cached' is given, show summary between index and given commit,
 737 # or between working tree and given commit
 738 #
 739 # $@ = [commit (default 'HEAD'),] requested paths (default all)
 740 #
 741 cmd_summary() {
 742         summary_limit=-1
 743         for_status=
 744         diff_cmd=diff-index
 745
 746         # parse $args after "submodule ... summary".
 747         while test $# -ne 0
 748         do
 749                 case "$1" in
 750                 --cached)
 751                         cached="$1"
 752                         ;;
 753                 --files)
 754                         files="$1"
 755                         ;;
 756                 --for-status)
 757                         for_status="$1"
 758                         ;;
 759                 -n|--summary-limit)
 760                         if summary_limit=$(($2 + 0)) 2>/dev/null && test "$summary_limit" = "$2"
 761                         then
 762                                 :
 763                         else
 764                                 usage
 765                         fi
 766                         shift
 767                         ;;
 768                 --)
 769                         shift
 770                         break
 771                         ;;
 772                 -*)
 773                         usage
 774                         ;;
 775                 *)
 776                         break
 777                         ;;
 778                 esac
 779                 shift
 780         done
 781
 782         test $summary_limit = 0 && return
 783
 784         if rev=$(git rev-parse -q --verify --default HEAD ${1+"$1"})
 785         then
 786                 head=$rev
 787                 test $# = 0 || shift
 788         elif test -z "$1" -o "$1" = "HEAD"
 789         then
 790                 # before the first commit: compare with an empty tree
 791                 head=$(git hash-object -w -t tree --stdin </dev/null)
 792                 test -z "$1" || shift
 793         else
 794                 head="HEAD"
 795         fi
 796
 797         if [ -n "$files" ]
 798         then
 799                 test -n "$cached" &&
 800                 die "$(gettext "The --cached option cannot be used with the --files option")"
 801                 diff_cmd=diff-files
 802                 head=
 803         fi
 804
 805         cd_to_toplevel
 806         # Get modified modules cared by user
 807         modules=$(git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- "$@" |
 808                 sane_egrep '^:([0-7]* )?160000' |
 809                 while read mod_src mod_dst sha1_src sha1_dst status name
 810                 do
 811                         # Always show modules deleted or type-changed (blob<->module)
 812                         test $status = D -o $status = T && echo "$name" && continue
 813                         # Also show added or modified modules which are checked out
 814                         GIT_DIR="$name/.git" git-rev-parse --git-dir >/dev/null 2>&1 &&
 815                         echo "$name"
 816                 done
 817         )
 818
 819         test -z "$modules" && return
 820
 821         git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- $modules |
 822         sane_egrep '^:([0-7]* )?160000' |
 823         cut -c2- |
 824         while read mod_src mod_dst sha1_src sha1_dst status name
 825         do
 826                 if test -z "$cached" &&
 827                         test $sha1_dst = 0000000000000000000000000000000000000000
 828                 then
 829                         case "$mod_dst" in
 830                         160000)
 831                                 sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
 832                                 ;;
 833                         100644 | 100755 | 120000)
 834                                 sha1_dst=$(git hash-object $name)
 835                                 ;;
 836                         000000)
 837                                 ;; # removed
 838                         *)
 839                                 # unexpected type
 840                                 eval_gettextln "unexpected mode \$mod_dst" >&2
 841                                 continue ;;
 842                         esac
 843                 fi
 844                 missing_src=
 845                 missing_dst=
 846
 847                 test $mod_src = 160000 &&
 848                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_src^0 >/dev/null &&
 849                 missing_src=t
 850
 851                 test $mod_dst = 160000 &&
 852                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_dst^0 >/dev/null &&
 853                 missing_dst=t
 854
 855                 total_commits=
 856                 case "$missing_src,$missing_dst" in
 857                 t,)
 858                         errmsg="$(eval_gettext "  Warn: \$name doesn't contain commit \$sha1_src")"
 859                         ;;
 860                 ,t)
 861                         errmsg="$(eval_gettext "  Warn: \$name doesn't contain commit \$sha1_dst")"
 862                         ;;
 863                 t,t)
 864                         errmsg="$(eval_gettext "  Warn: \$name doesn't contain commits \$sha1_src and \$sha1_dst")"
 865                         ;;
 866                 *)
 867                         errmsg=
 868                         total_commits=$(
 869                         if test $mod_src = 160000 -a $mod_dst = 160000
 870                         then
 871                                 range="$sha1_src...$sha1_dst"
 872                         elif test $mod_src = 160000
 873                         then
 874                                 range=$sha1_src
 875                         else
 876                                 range=$sha1_dst
 877                         fi
 878                         GIT_DIR="$name/.git" \
 879                         git rev-list --first-parent $range -- | wc -l
 880                         )
 881                         total_commits=" ($(($total_commits + 0)))"
 882                         ;;
 883                 esac
 884
 885                 sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
 886                 sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
 887                 if test $status = T
 888                 then
 889                         blob="$(gettext "blob")"
 890                         submodule="$(gettext "submodule")"
 891                         if test $mod_dst = 160000
 892                         then
 893                                 echo "* $name $sha1_abbr_src($blob)->$sha1_abbr_dst($submodule)$total_commits:"
 894                         else
 895                                 echo "* $name $sha1_abbr_src($submodule)->$sha1_abbr_dst($blob)$total_commits:"
 896                         fi
 897                 else
 898                         echo "* $name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
 899                 fi
 900                 if test -n "$errmsg"
 901                 then
 902                         # Don't give error msg for modification whose dst is not submodule
 903                         # i.e. deleted or changed to blob
 904                         test $mod_dst = 160000 && echo "$errmsg"
 905                 else
 906                         if test $mod_src = 160000 -a $mod_dst = 160000
 907                         then
 908                                 limit=
 909                                 test $summary_limit -gt 0 && limit="-$summary_limit"
 910                                 GIT_DIR="$name/.git" \
 911                                 git log $limit --pretty='format:  %m %s' \
 912                                 --first-parent $sha1_src...$sha1_dst
 913                         elif test $mod_dst = 160000
 914                         then
 915                                 GIT_DIR="$name/.git" \
 916                                 git log --pretty='format:  > %s' -1 $sha1_dst
 917                         else
 918                                 GIT_DIR="$name/.git" \
 919                                 git log --pretty='format:  < %s' -1 $sha1_src
 920                         fi
 921                         echo
 922                 fi
 923                 echo
 924         done |
 925         if test -n "$for_status"; then
 926                 if [ -n "$files" ]; then
 927                         status_msg="$(gettextln "# Submodules changed but not updated:")"
 928                 else
 929                         status_msg="$(gettextln "# Submodule changes to be committed:")"
 930                 fi
 931                 status_sed=$(sed -e 's|^|# |' -e 's|^# $|#|')
 932                 cat <<EOF
 933 $status_msg
 934 #
 935 $status_sed
 936 EOF
 937         else
 938                 cat
 939         fi
 940 }
 941 #
 942 # List all submodules, prefixed with:
 943 #  - submodule not initialized
 944 #  + different revision checked out
 945 #
 946 # If --cached was specified the revision in the index will be printed
 947 # instead of the currently checked out revision.
 948 #
 949 # $@ = requested paths (default to all)
 950 #
 951 cmd_status()
 952 {
 953         # parse $args after "submodule ... status".
 954         while test $# -ne 0
 955         do
 956                 case "$1" in
 957                 -q|--quiet)
 958                         GIT_QUIET=1
 959                         ;;
 960                 --cached)
 961                         cached=1
 962                         ;;
 963                 --recursive)
 964                         recursive=1
 965                         ;;
 966                 --)
 967                         shift
 968                         break
 969                         ;;
 970                 -*)
 971                         usage
 972                         ;;
 973                 *)
 974                         break
 975                         ;;
 976                 esac
 977                 shift
 978         done
 979
 980         module_list "$@" |
 981         while read mode sha1 stage sm_path
 982         do
 983                 die_if_unmatched "$mode"
 984                 name=$(module_name "$sm_path") || exit
 985                 url=$(git config submodule."$name".url)
 986                 displaypath="$prefix$sm_path"
 987                 if test "$stage" = U
 988                 then
 989                         say "U$sha1 $displaypath"
 990                         continue
 991                 fi
 992                 if test -z "$url" || ! test -d "$sm_path"/.git -o -f "$sm_path"/.git
 993                 then
 994                         say "-$sha1 $displaypath"
 995                         continue;
 996                 fi
 997                 set_name_rev "$sm_path" "$sha1"
 998                 if git diff-files --ignore-submodules=dirty --quiet -- "$sm_path"
 999                 then
1000                         say " $sha1 $displaypath$revname"
1001                 else
1002                         if test -z "$cached"
1003                         then
1004                                 sha1=$(clear_local_git_env; cd "$sm_path" && git rev-parse --verify HEAD)
1005                                 set_name_rev "$sm_path" "$sha1"
1006                         fi
1007                         say "+$sha1 $displaypath$revname"
1008                 fi
1009
1010                 if test -n "$recursive"
1011                 then
1012                         (
1013                                 prefix="$displaypath/"
1014                                 clear_local_git_env
1015                                 cd "$sm_path" &&
1016                                 eval cmd_status
1017                         ) ||
1018                         die "$(eval_gettext "Failed to recurse into submodule path '\$sm_path'")"
1019                 fi
1020         done
1021 }
1022 #
1023 # Sync remote urls for submodules
1024 # This makes the value for remote.$remote.url match the value
1025 # specified in .gitmodules.
1026 #
1027 cmd_sync()
1028 {
1029         while test $# -ne 0
1030         do
1031                 case "$1" in
1032                 -q|--quiet)
1033                         GIT_QUIET=1
1034                         shift
1035                         ;;
1036                 --recursive)
1037                         recursive=1
1038                         shift
1039                         ;;
1040                 --)
1041                         shift
1042                         break
1043                         ;;
1044                 -*)
1045                         usage
1046                         ;;
1047                 *)
1048                         break
1049                         ;;
1050                 esac
1051         done
1052         cd_to_toplevel
1053         module_list "$@" |
1054         while read mode sha1 stage sm_path
1055         do
1056                 die_if_unmatched "$mode"
1057                 name=$(module_name "$sm_path")
1058                 url=$(git config -f .gitmodules --get submodule."$name".url)
1059
1060                 # Possibly a url relative to parent
1061                 case "$url" in
1062                 ./*|../*)
1063                         # rewrite foo/bar as ../.. to find path from
1064                         # submodule work tree to superproject work tree
1065                         up_path="$(echo "$sm_path" | sed "s/[^/][^/]*/../g")" &&
1066                         # guarantee a trailing /
1067                         up_path=${up_path%/}/ &&
1068                         # path from submodule work tree to submodule origin repo
1069                         sub_origin_url=$(resolve_relative_url "$url" "$up_path") &&
1070                         # path from superproject work tree to submodule origin repo
1071                         super_config_url=$(resolve_relative_url "$url") || exit
1072                         ;;
1073                 *)
1074                         sub_origin_url="$url"
1075                         super_config_url="$url"
1076                         ;;
1077                 esac
1078
1079                 if git config "submodule.$name.url" >/dev/null 2>/dev/null
1080                 then
1081                         say "$(eval_gettext "Synchronizing submodule url for '\$prefix\$sm_path'")"
1082                         git config submodule."$name".url "$super_config_url"
1083
1084                         if test -e "$sm_path"/.git
1085                         then
1086                         (
1087                                 clear_local_git_env
1088                                 cd "$sm_path"
1089                                 remote=$(get_default_remote)
1090                                 git config remote."$remote".url "$sub_origin_url"
1091
1092                                 if test -n "$recursive"
1093                                 then
1094                                         prefix="$prefix$sm_path/"
1095                                         eval cmd_sync
1096                                 fi
1097                         )
1098                         fi
1099                 fi
1100         done
1101 }
1102
1103 # This loop parses the command line arguments to find the
1104 # subcommand name to dispatch.  Parsing of the subcommand specific
1105 # options are primarily done by the subcommand implementations.
1106 # Subcommand specific options such as --branch and --cached are
1107 # parsed here as well, for backward compatibility.
1108
1109 while test $# != 0 && test -z "$command"
1110 do
1111         case "$1" in
1112         add | foreach | init | update | status | summary | sync)
1113                 command=$1
1114                 ;;
1115         -q|--quiet)
1116                 GIT_QUIET=1
1117                 ;;
1118         -b|--branch)
1119                 case "$2" in
1120                 '')
1121                         usage
1122                         ;;
1123                 esac
1124                 branch="$2"; shift
1125                 ;;
1126         --cached)
1127                 cached="$1"
1128                 ;;
1129         --)
1130                 break
1131                 ;;
1132         -*)
1133                 usage
1134                 ;;
1135         *)
1136                 break
1137                 ;;
1138         esac
1139         shift
1140 done
1141
1142 # No command word defaults to "status"
1143 if test -z "$command"
1144 then
1145     if test $# = 0
1146     then
1147         command=status
1148     else
1149         usage
1150     fi
1151 fi
1152
1153 # "-b branch" is accepted only by "add"
1154 if test -n "$branch" && test "$command" != add
1155 then
1156         usage
1157 fi
1158
1159 # "--cached" is accepted only by "status" and "summary"
1160 if test -n "$cached" && test "$command" != status -a "$command" != summary
1161 then
1162         usage
1163 fi
1164
1165 "cmd_$command" "$@"