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                 cat >&2 <<EOF
 269 The following path is ignored by one of your .gitignore files:
 270 $(eval_gettextln $path)
 271 Use -f if you really want to add it.
 272 EOF
 273                 exit 1
 274         fi
 275
 276         # perhaps the path exists and is already a git repo, else clone it
 277         if test -e "$path"
 278         then
 279                 if test -d "$path"/.git -o -f "$path"/.git
 280                 then
 281                         eval_gettextln "Adding existing repo at '\$path' to the index"
 282                 else
 283                         die "$(eval_gettext "'\$path' already exists and is not a valid git repo")"
 284                 fi
 285
 286         else
 287
 288                 module_clone "$path" "$realrepo" "$reference" || exit
 289                 (
 290                         clear_local_git_env
 291                         cd "$path" &&
 292                         # ash fails to wordsplit ${branch:+-b "$branch"...}
 293                         case "$branch" in
 294                         '') git checkout -f -q ;;
 295                         ?*) git checkout -f -q -B "$branch" "origin/$branch" ;;
 296                         esac
 297                 ) || die "$(eval_gettext "Unable to checkout submodule '\$path'")"
 298         fi
 299         git config submodule."$path".url "$realrepo"
 300
 301         git add $force "$path" ||
 302         die "$(eval_gettext "Failed to add submodule '\$path'")"
 303
 304         git config -f .gitmodules submodule."$path".path "$path" &&
 305         git config -f .gitmodules submodule."$path".url "$repo" &&
 306         git add --force .gitmodules ||
 307         die "$(eval_gettext "Failed to register submodule '\$path'")"
 308 }
 309
 310 #
 311 # Execute an arbitrary command sequence in each checked out
 312 # submodule
 313 #
 314 # $@ = command to execute
 315 #
 316 cmd_foreach()
 317 {
 318         # parse $args after "submodule ... foreach".
 319         while test $# -ne 0
 320         do
 321                 case "$1" in
 322                 -q|--quiet)
 323                         GIT_QUIET=1
 324                         ;;
 325                 --recursive)
 326                         recursive=1
 327                         ;;
 328                 -*)
 329                         usage
 330                         ;;
 331                 *)
 332                         break
 333                         ;;
 334                 esac
 335                 shift
 336         done
 337
 338         toplevel=$(pwd)
 339
 340         # dup stdin so that it can be restored when running the external
 341         # command in the subshell (and a recursive call to this function)
 342         exec 3<&0
 343
 344         module_list |
 345         while read mode sha1 stage path
 346         do
 347                 if test -e "$path"/.git
 348                 then
 349                         say "$(eval_gettext "Entering '\$prefix\$path'")"
 350                         name=$(module_name "$path")
 351                         (
 352                                 prefix="$prefix$path/"
 353                                 clear_local_git_env
 354                                 cd "$path" &&
 355                                 eval "$@" &&
 356                                 if test -n "$recursive"
 357                                 then
 358                                         cmd_foreach "--recursive" "$@"
 359                                 fi
 360                         ) <&3 3<&- ||
 361                         die "$(eval_gettext "Stopping at '\$path'; script returned non-zero status.")"
 362                 fi
 363         done
 364 }
 365
 366 #
 367 # Register submodules in .git/config
 368 #
 369 # $@ = requested paths (default to all)
 370 #
 371 cmd_init()
 372 {
 373         # parse $args after "submodule ... init".
 374         while test $# -ne 0
 375         do
 376                 case "$1" in
 377                 -q|--quiet)
 378                         GIT_QUIET=1
 379                         ;;
 380                 --)
 381                         shift
 382                         break
 383                         ;;
 384                 -*)
 385                         usage
 386                         ;;
 387                 *)
 388                         break
 389                         ;;
 390                 esac
 391                 shift
 392         done
 393
 394         module_list "$@" |
 395         while read mode sha1 stage path
 396         do
 397                 # Skip already registered paths
 398                 name=$(module_name "$path") || exit
 399                 if test -z "$(git config "submodule.$name.url")"
 400                 then
 401                         url=$(git config -f .gitmodules submodule."$name".url)
 402                         test -z "$url" &&
 403                         die "$(eval_gettext "No url found for submodule path '\$path' in .gitmodules")"
 404
 405                         # Possibly a url relative to parent
 406                         case "$url" in
 407                         ./*|../*)
 408                                 url=$(resolve_relative_url "$url") || exit
 409                                 ;;
 410                         esac
 411                         git config submodule."$name".url "$url" ||
 412                         die "$(eval_gettext "Failed to register url for submodule path '\$path'")"
 413                 fi
 414
 415                 # Copy "update" setting when it is not set yet
 416                 upd="$(git config -f .gitmodules submodule."$name".update)"
 417                 test -z "$upd" ||
 418                 test -n "$(git config submodule."$name".update)" ||
 419                 git config submodule."$name".update "$upd" ||
 420                 die "$(eval_gettext "Failed to register update mode for submodule path '\$path'")"
 421
 422                 say "$(eval_gettext "Submodule '\$name' (\$url) registered for path '\$path'")"
 423         done
 424 }
 425
 426 #
 427 # Update each submodule path to correct revision, using clone and checkout as needed
 428 #
 429 # $@ = requested paths (default to all)
 430 #
 431 cmd_update()
 432 {
 433         # parse $args after "submodule ... update".
 434         orig_flags=
 435         while test $# -ne 0
 436         do
 437                 case "$1" in
 438                 -q|--quiet)
 439                         GIT_QUIET=1
 440                         ;;
 441                 -i|--init)
 442                         init=1
 443                         ;;
 444                 -N|--no-fetch)
 445                         nofetch=1
 446                         ;;
 447                 -f|--force)
 448                         force=$1
 449                         ;;
 450                 -r|--rebase)
 451                         update="rebase"
 452                         ;;
 453                 --reference)
 454                         case "$2" in '') usage ;; esac
 455                         reference="--reference=$2"
 456                         orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 457                         shift
 458                         ;;
 459                 --reference=*)
 460                         reference="$1"
 461                         ;;
 462                 -m|--merge)
 463                         update="merge"
 464                         ;;
 465                 --recursive)
 466                         recursive=1
 467                         ;;
 468                 --checkout)
 469                         update="checkout"
 470                         ;;
 471                 --)
 472                         shift
 473                         break
 474                         ;;
 475                 -*)
 476                         usage
 477                         ;;
 478                 *)
 479                         break
 480                         ;;
 481                 esac
 482                 orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 483                 shift
 484         done
 485
 486         if test -n "$init"
 487         then
 488                 cmd_init "--" "$@" || return
 489         fi
 490
 491         cloned_modules=
 492         module_list "$@" | {
 493         err=
 494         while read mode sha1 stage path
 495         do
 496                 if test "$stage" = U
 497                 then
 498                         echo >&2 "Skipping unmerged submodule $path"
 499                         continue
 500                 fi
 501                 name=$(module_name "$path") || exit
 502                 url=$(git config submodule."$name".url)
 503                 if ! test -z "$update"
 504                 then
 505                         update_module=$update
 506                 else
 507                         update_module=$(git config submodule."$name".update)
 508                 fi
 509
 510                 if test "$update_module" = "none"
 511                 then
 512                         echo "Skipping submodule '$path'"
 513                         continue
 514                 fi
 515
 516                 if test -z "$url"
 517                 then
 518                         # Only mention uninitialized submodules when its
 519                         # path have been specified
 520                         test "$#" != "0" &&
 521                         say "$(eval_gettext "Submodule path '\$path' not initialized
 522 Maybe you want to use 'update --init'?")"
 523                         continue
 524                 fi
 525
 526                 if ! test -d "$path"/.git -o -f "$path"/.git
 527                 then
 528                         module_clone "$path" "$url" "$reference"|| exit
 529                         cloned_modules="$cloned_modules;$name"
 530                         subsha1=
 531                 else
 532                         subsha1=$(clear_local_git_env; cd "$path" &&
 533                                 git rev-parse --verify HEAD) ||
 534                         die "$(eval_gettext "Unable to find current revision in submodule path '\$path'")"
 535                 fi
 536
 537                 if test "$subsha1" != "$sha1"
 538                 then
 539                         subforce=$force
 540                         # If we don't already have a -f flag and the submodule has never been checked out
 541                         if test -z "$subsha1" -a -z "$force"
 542                         then
 543                                 subforce="-f"
 544                         fi
 545
 546                         if test -z "$nofetch"
 547                         then
 548                                 # Run fetch only if $sha1 isn't present or it
 549                                 # is not reachable from a ref.
 550                                 (clear_local_git_env; cd "$path" &&
 551                                         ( (rev=$(git rev-list -n 1 $sha1 --not --all 2>/dev/null) &&
 552                                          test -z "$rev") || git-fetch)) ||
 553                                 die "$(eval_gettext "Unable to fetch in submodule path '\$path'")"
 554                         fi
 555
 556                         # Is this something we just cloned?
 557                         case ";$cloned_modules;" in
 558                         *";$name;"*)
 559                                 # then there is no local change to integrate
 560                                 update_module= ;;
 561                         esac
 562
 563                         must_die_on_failure=
 564                         case "$update_module" in
 565                         rebase)
 566                                 command="git rebase"
 567                                 die_msg="$(eval_gettext "Unable to rebase '\$sha1' in submodule path '\$path'")"
 568                                 say_msg="$(eval_gettext "Submodule path '\$path': rebased into '\$sha1'")"
 569                                 must_die_on_failure=yes
 570                                 ;;
 571                         merge)
 572                                 command="git merge"
 573                                 die_msg="$(eval_gettext "Unable to merge '\$sha1' in submodule path '\$path'")"
 574                                 say_msg="$(eval_gettext "Submodule path '\$path': merged in '\$sha1'")"
 575                                 must_die_on_failure=yes
 576                                 ;;
 577                         *)
 578                                 command="git checkout $subforce -q"
 579                                 die_msg="$(eval_gettext "Unable to checkout '\$sha1' in submodule path '\$path'")"
 580                                 say_msg="$(eval_gettext "Submodule path '\$path': checked out '\$sha1'")"
 581                                 ;;
 582                         esac
 583
 584                         if (clear_local_git_env; cd "$path" && $command "$sha1")
 585                         then
 586                                 say "$say_msg"
 587                         elif test -n "$must_die_on_failure"
 588                         then
 589                                 die_with_status 2 "$die_msg"
 590                         else
 591                                 err="${err};$die_msg"
 592                                 continue
 593                         fi
 594                 fi
 595
 596                 if test -n "$recursive"
 597                 then
 598                         (clear_local_git_env; cd "$path" && eval cmd_update "$orig_flags")
 599                         res=$?
 600                         if test $res -gt 0
 601                         then
 602                                 die_msg="$(eval_gettext "Failed to recurse into submodule path '\$path'")"
 603                                 if test $res -eq 1
 604                                 then
 605                                         err="${err};$die_msg"
 606                                         continue
 607                                 else
 608                                         die_with_status $res "$die_msg"
 609                                 fi
 610                         fi
 611                 fi
 612         done
 613
 614         if test -n "$err"
 615         then
 616                 OIFS=$IFS
 617                 IFS=';'
 618                 for e in $err
 619                 do
 620                         if test -n "$e"
 621                         then
 622                                 echo >&2 "$e"
 623                         fi
 624                 done
 625                 IFS=$OIFS
 626                 exit 1
 627         fi
 628         }
 629 }
 630
 631 set_name_rev () {
 632         revname=$( (
 633                 clear_local_git_env
 634                 cd "$1" && {
 635                         git describe "$2" 2>/dev/null ||
 636                         git describe --tags "$2" 2>/dev/null ||
 637                         git describe --contains "$2" 2>/dev/null ||
 638                         git describe --all --always "$2"
 639                 }
 640         ) )
 641         test -z "$revname" || revname=" ($revname)"
 642 }
 643 #
 644 # Show commit summary for submodules in index or working tree
 645 #
 646 # If '--cached' is given, show summary between index and given commit,
 647 # or between working tree and given commit
 648 #
 649 # $@ = [commit (default 'HEAD'),] requested paths (default all)
 650 #
 651 cmd_summary() {
 652         summary_limit=-1
 653         for_status=
 654         diff_cmd=diff-index
 655
 656         # parse $args after "submodule ... summary".
 657         while test $# -ne 0
 658         do
 659                 case "$1" in
 660                 --cached)
 661                         cached="$1"
 662                         ;;
 663                 --files)
 664                         files="$1"
 665                         ;;
 666                 --for-status)
 667                         for_status="$1"
 668                         ;;
 669                 -n|--summary-limit)
 670                         if summary_limit=$(($2 + 0)) 2>/dev/null && test "$summary_limit" = "$2"
 671                         then
 672                                 :
 673                         else
 674                                 usage
 675                         fi
 676                         shift
 677                         ;;
 678                 --)
 679                         shift
 680                         break
 681                         ;;
 682                 -*)
 683                         usage
 684                         ;;
 685                 *)
 686                         break
 687                         ;;
 688                 esac
 689                 shift
 690         done
 691
 692         test $summary_limit = 0 && return
 693
 694         if rev=$(git rev-parse -q --verify --default HEAD ${1+"$1"})
 695         then
 696                 head=$rev
 697                 test $# = 0 || shift
 698         elif test -z "$1" -o "$1" = "HEAD"
 699         then
 700                 # before the first commit: compare with an empty tree
 701                 head=$(git hash-object -w -t tree --stdin </dev/null)
 702                 test -z "$1" || shift
 703         else
 704                 head="HEAD"
 705         fi
 706
 707         if [ -n "$files" ]
 708         then
 709                 test -n "$cached" &&
 710                 die "$(gettext -- "--cached cannot be used with --files")"
 711                 diff_cmd=diff-files
 712                 head=
 713         fi
 714
 715         cd_to_toplevel
 716         # Get modified modules cared by user
 717         modules=$(git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- "$@" |
 718                 sane_egrep '^:([0-7]* )?160000' |
 719                 while read mod_src mod_dst sha1_src sha1_dst status name
 720                 do
 721                         # Always show modules deleted or type-changed (blob<->module)
 722                         test $status = D -o $status = T && echo "$name" && continue
 723                         # Also show added or modified modules which are checked out
 724                         GIT_DIR="$name/.git" git-rev-parse --git-dir >/dev/null 2>&1 &&
 725                         echo "$name"
 726                 done
 727         )
 728
 729         test -z "$modules" && return
 730
 731         git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- $modules |
 732         sane_egrep '^:([0-7]* )?160000' |
 733         cut -c2- |
 734         while read mod_src mod_dst sha1_src sha1_dst status name
 735         do
 736                 if test -z "$cached" &&
 737                         test $sha1_dst = 0000000000000000000000000000000000000000
 738                 then
 739                         case "$mod_dst" in
 740                         160000)
 741                                 sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
 742                                 ;;
 743                         100644 | 100755 | 120000)
 744                                 sha1_dst=$(git hash-object $name)
 745                                 ;;
 746                         000000)
 747                                 ;; # removed
 748                         *)
 749                                 # unexpected type
 750                                 eval_gettextln "unexpected mode \$mod_dst" >&2
 751                                 continue ;;
 752                         esac
 753                 fi
 754                 missing_src=
 755                 missing_dst=
 756
 757                 test $mod_src = 160000 &&
 758                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_src^0 >/dev/null &&
 759                 missing_src=t
 760
 761                 test $mod_dst = 160000 &&
 762                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_dst^0 >/dev/null &&
 763                 missing_dst=t
 764
 765                 total_commits=
 766                 case "$missing_src,$missing_dst" in
 767                 t,)
 768                         errmsg="$(eval_gettext "  Warn: \$name doesn't contain commit \$sha1_src")"
 769                         ;;
 770                 ,t)
 771                         errmsg="$(eval_gettext "  Warn: \$name doesn't contain commit \$sha1_dst")"
 772                         ;;
 773                 t,t)
 774                         errmsg="$(eval_gettext "  Warn: \$name doesn't contain commits \$sha1_src and \$sha1_dst")"
 775                         ;;
 776                 *)
 777                         errmsg=
 778                         total_commits=$(
 779                         if test $mod_src = 160000 -a $mod_dst = 160000
 780                         then
 781                                 range="$sha1_src...$sha1_dst"
 782                         elif test $mod_src = 160000
 783                         then
 784                                 range=$sha1_src
 785                         else
 786                                 range=$sha1_dst
 787                         fi
 788                         GIT_DIR="$name/.git" \
 789                         git rev-list --first-parent $range -- | wc -l
 790                         )
 791                         total_commits=" ($(($total_commits + 0)))"
 792                         ;;
 793                 esac
 794
 795                 sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
 796                 sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
 797                 if test $status = T
 798                 then
 799                         blob="$(gettext "blob")"
 800                         submodule="$(gettext "submodule")"
 801                         if test $mod_dst = 160000
 802                         then
 803                                 echo "* $name $sha1_abbr_src($blob)->$sha1_abbr_dst($submodule)$total_commits:"
 804                         else
 805                                 echo "* $name $sha1_abbr_src($submodule)->$sha1_abbr_dst($blob)$total_commits:"
 806                         fi
 807                 else
 808                         echo "* $name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
 809                 fi
 810                 if test -n "$errmsg"
 811                 then
 812                         # Don't give error msg for modification whose dst is not submodule
 813                         # i.e. deleted or changed to blob
 814                         test $mod_dst = 160000 && echo "$errmsg"
 815                 else
 816                         if test $mod_src = 160000 -a $mod_dst = 160000
 817                         then
 818                                 limit=
 819                                 test $summary_limit -gt 0 && limit="-$summary_limit"
 820                                 GIT_DIR="$name/.git" \
 821                                 git log $limit --pretty='format:  %m %s' \
 822                                 --first-parent $sha1_src...$sha1_dst
 823                         elif test $mod_dst = 160000
 824                         then
 825                                 GIT_DIR="$name/.git" \
 826                                 git log --pretty='format:  > %s' -1 $sha1_dst
 827                         else
 828                                 GIT_DIR="$name/.git" \
 829                                 git log --pretty='format:  < %s' -1 $sha1_src
 830                         fi
 831                         echo
 832                 fi
 833                 echo
 834         done |
 835         if test -n "$for_status"; then
 836                 if [ -n "$files" ]; then
 837                         status_msg="$(gettextln "# Submodules changed but not updated:")"
 838                 else
 839                         status_msg="$(gettextln "# Submodule changes to be committed:")"
 840                 fi
 841                 status_sed=$(sed -e 's|^|# |' -e 's|^# $|#|')
 842                 cat <<EOF
 843 $status_msg
 844 #
 845 $status_sed
 846 EOF
 847         else
 848                 cat
 849         fi
 850 }
 851 #
 852 # List all submodules, prefixed with:
 853 #  - submodule not initialized
 854 #  + different revision checked out
 855 #
 856 # If --cached was specified the revision in the index will be printed
 857 # instead of the currently checked out revision.
 858 #
 859 # $@ = requested paths (default to all)
 860 #
 861 cmd_status()
 862 {
 863         # parse $args after "submodule ... status".
 864         orig_flags=
 865         while test $# -ne 0
 866         do
 867                 case "$1" in
 868                 -q|--quiet)
 869                         GIT_QUIET=1
 870                         ;;
 871                 --cached)
 872                         cached=1
 873                         ;;
 874                 --recursive)
 875                         recursive=1
 876                         ;;
 877                 --)
 878                         shift
 879                         break
 880                         ;;
 881                 -*)
 882                         usage
 883                         ;;
 884                 *)
 885                         break
 886                         ;;
 887                 esac
 888                 orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 889                 shift
 890         done
 891
 892         module_list "$@" |
 893         while read mode sha1 stage path
 894         do
 895                 name=$(module_name "$path") || exit
 896                 url=$(git config submodule."$name".url)
 897                 displaypath="$prefix$path"
 898                 if test "$stage" = U
 899                 then
 900                         say "U$sha1 $displaypath"
 901                         continue
 902                 fi
 903                 if test -z "$url" || ! test -d "$path"/.git -o -f "$path"/.git
 904                 then
 905                         say "-$sha1 $displaypath"
 906                         continue;
 907                 fi
 908                 set_name_rev "$path" "$sha1"
 909                 if git diff-files --ignore-submodules=dirty --quiet -- "$path"
 910                 then
 911                         say " $sha1 $displaypath$revname"
 912                 else
 913                         if test -z "$cached"
 914                         then
 915                                 sha1=$(clear_local_git_env; cd "$path" && git rev-parse --verify HEAD)
 916                                 set_name_rev "$path" "$sha1"
 917                         fi
 918                         say "+$sha1 $displaypath$revname"
 919                 fi
 920
 921                 if test -n "$recursive"
 922                 then
 923                         (
 924                                 prefix="$displaypath/"
 925                                 clear_local_git_env
 926                                 cd "$path" &&
 927                                 eval cmd_status "$orig_args"
 928                         ) ||
 929                         die "$(eval_gettext "Failed to recurse into submodule path '\$path'")"
 930                 fi
 931         done
 932 }
 933 #
 934 # Sync remote urls for submodules
 935 # This makes the value for remote.$remote.url match the value
 936 # specified in .gitmodules.
 937 #
 938 cmd_sync()
 939 {
 940         while test $# -ne 0
 941         do
 942                 case "$1" in
 943                 -q|--quiet)
 944                         GIT_QUIET=1
 945                         shift
 946                         ;;
 947                 --)
 948                         shift
 949                         break
 950                         ;;
 951                 -*)
 952                         usage
 953                         ;;
 954                 *)
 955                         break
 956                         ;;
 957                 esac
 958         done
 959         cd_to_toplevel
 960         module_list "$@" |
 961         while read mode sha1 stage path
 962         do
 963                 name=$(module_name "$path")
 964                 url=$(git config -f .gitmodules --get submodule."$name".url)
 965
 966                 # Possibly a url relative to parent
 967                 case "$url" in
 968                 ./*|../*)
 969                         url=$(resolve_relative_url "$url") || exit
 970                         ;;
 971                 esac
 972
 973                 if git config "submodule.$name.url" >/dev/null 2>/dev/null
 974                 then
 975                         say "$(eval_gettext "Synchronizing submodule url for '\$name'")"
 976                         git config submodule."$name".url "$url"
 977
 978                         if test -e "$path"/.git
 979                         then
 980                         (
 981                                 clear_local_git_env
 982                                 cd "$path"
 983                                 remote=$(get_default_remote)
 984                                 git config remote."$remote".url "$url"
 985                         )
 986                         fi
 987                 fi
 988         done
 989 }
 990
 991 # This loop parses the command line arguments to find the
 992 # subcommand name to dispatch.  Parsing of the subcommand specific
 993 # options are primarily done by the subcommand implementations.
 994 # Subcommand specific options such as --branch and --cached are
 995 # parsed here as well, for backward compatibility.
 996
 997 while test $# != 0 && test -z "$command"
 998 do
 999         case "$1" in
1000         add | foreach | init | update | status | summary | sync)
1001                 command=$1
1002                 ;;
1003         -q|--quiet)
1004                 GIT_QUIET=1
1005                 ;;
1006         -b|--branch)
1007                 case "$2" in
1008                 '')
1009                         usage
1010                         ;;
1011                 esac
1012                 branch="$2"; shift
1013                 ;;
1014         --cached)
1015                 cached="$1"
1016                 ;;
1017         --)
1018                 break
1019                 ;;
1020         -*)
1021                 usage
1022                 ;;
1023         *)
1024                 break
1025                 ;;
1026         esac
1027         shift
1028 done
1029
1030 # No command word defaults to "status"
1031 test -n "$command" || command=status
1032
1033 # "-b branch" is accepted only by "add"
1034 if test -n "$branch" && test "$command" != add
1035 then
1036         usage
1037 fi
1038
1039 # "--cached" is accepted only by "status" and "summary"
1040 if test -n "$cached" && test "$command" != status -a "$command" != summary
1041 then
1042         usage
1043 fi
1044
1045 "cmd_$command" "$@"