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         # We already are at the root of the work tree but cd_to_toplevel will
 153         # resolve any symlinks that might be present in $PWD
 154         a=$(cd_to_toplevel && cd "$gitdir" && pwd)/
 155         b=$(cd_to_toplevel && cd "$path" && pwd)/
 156         # normalize Windows-style absolute paths to POSIX-style absolute paths
 157         case $a in [a-zA-Z]:/*) a=/${a%%:*}${a#*:} ;; esac
 158         case $b in [a-zA-Z]:/*) b=/${b%%:*}${b#*:} ;; esac
 159         # Remove all common leading directories after a sanity check
 160         if test "${a#$b}" != "$a" || test "${b#$a}" != "$b"; then
 161                 die "$(eval_gettext "Gitdir '\$a' is part of the submodule path '\$b' or vice versa")"
 162         fi
 163         while test "${a%%/*}" = "${b%%/*}"
 164         do
 165                 a=${a#*/}
 166                 b=${b#*/}
 167         done
 168         # Now chop off the trailing '/'s that were added in the beginning
 169         a=${a%/}
 170         b=${b%/}
 171
 172         # Turn each leading "*/" component into "../"
 173         rel=$(echo $b | sed -e 's|[^/][^/]*|..|g')
 174         echo "gitdir: $rel/$a" >"$path/.git"
 175
 176         rel=$(echo $a | sed -e 's|[^/][^/]*|..|g')
 177         (clear_local_git_env; cd "$path" && GIT_WORK_TREE=. git config core.worktree "$rel/$b")
 178 }
 179
 180 #
 181 # Add a new submodule to the working tree, .gitmodules and the index
 182 #
 183 # $@ = repo path
 184 #
 185 # optional branch is stored in global branch variable
 186 #
 187 cmd_add()
 188 {
 189         # parse $args after "submodule ... add".
 190         while test $# -ne 0
 191         do
 192                 case "$1" in
 193                 -b | --branch)
 194                         case "$2" in '') usage ;; esac
 195                         branch=$2
 196                         shift
 197                         ;;
 198                 -f | --force)
 199                         force=$1
 200                         ;;
 201                 -q|--quiet)
 202                         GIT_QUIET=1
 203                         ;;
 204                 --reference)
 205                         case "$2" in '') usage ;; esac
 206                         reference="--reference=$2"
 207                         shift
 208                         ;;
 209                 --reference=*)
 210                         reference="$1"
 211                         shift
 212                         ;;
 213                 --)
 214                         shift
 215                         break
 216                         ;;
 217                 -*)
 218                         usage
 219                         ;;
 220                 *)
 221                         break
 222                         ;;
 223                 esac
 224                 shift
 225         done
 226
 227         repo=$1
 228         path=$2
 229
 230         if test -z "$path"; then
 231                 path=$(echo "$repo" |
 232                         sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
 233         fi
 234
 235         if test -z "$repo" -o -z "$path"; then
 236                 usage
 237         fi
 238
 239         # assure repo is absolute or relative to parent
 240         case "$repo" in
 241         ./*|../*)
 242                 # dereference source url relative to parent's url
 243                 realrepo=$(resolve_relative_url "$repo") || exit
 244                 ;;
 245         *:*|/*)
 246                 # absolute url
 247                 realrepo=$repo
 248                 ;;
 249         *)
 250                 die "$(eval_gettext "repo URL: '\$repo' must be absolute or begin with ./|../")"
 251         ;;
 252         esac
 253
 254         # normalize path:
 255         # multiple //; leading ./; /./; /../; trailing /
 256         path=$(printf '%s/\n' "$path" |
 257                 sed -e '
 258                         s|//*|/|g
 259                         s|^\(\./\)*||
 260                         s|/\./|/|g
 261                         :start
 262                         s|\([^/]*\)/\.\./||
 263                         tstart
 264                         s|/*$||
 265                 ')
 266         git ls-files --error-unmatch "$path" > /dev/null 2>&1 &&
 267         die "$(eval_gettext "'\$path' already exists in the index")"
 268
 269         if test -z "$force" && ! git add --dry-run --ignore-missing "$path" > /dev/null 2>&1
 270         then
 271                 eval_gettextln "The following path is ignored by one of your .gitignore files:
 272 \$path
 273 Use -f if you really want to add it." >&2
 274                 exit 1
 275         fi
 276
 277         # perhaps the path exists and is already a git repo, else clone it
 278         if test -e "$path"
 279         then
 280                 if test -d "$path"/.git -o -f "$path"/.git
 281                 then
 282                         eval_gettextln "Adding existing repo at '\$path' to the index"
 283                 else
 284                         die "$(eval_gettext "'\$path' already exists and is not a valid git repo")"
 285                 fi
 286
 287         else
 288
 289                 module_clone "$path" "$realrepo" "$reference" || exit
 290                 (
 291                         clear_local_git_env
 292                         cd "$path" &&
 293                         # ash fails to wordsplit ${branch:+-b "$branch"...}
 294                         case "$branch" in
 295                         '') git checkout -f -q ;;
 296                         ?*) git checkout -f -q -B "$branch" "origin/$branch" ;;
 297                         esac
 298                 ) || die "$(eval_gettext "Unable to checkout submodule '\$path'")"
 299         fi
 300         git config submodule."$path".url "$realrepo"
 301
 302         git add $force "$path" ||
 303         die "$(eval_gettext "Failed to add submodule '\$path'")"
 304
 305         git config -f .gitmodules submodule."$path".path "$path" &&
 306         git config -f .gitmodules submodule."$path".url "$repo" &&
 307         git add --force .gitmodules ||
 308         die "$(eval_gettext "Failed to register submodule '\$path'")"
 309 }
 310
 311 #
 312 # Execute an arbitrary command sequence in each checked out
 313 # submodule
 314 #
 315 # $@ = command to execute
 316 #
 317 cmd_foreach()
 318 {
 319         # parse $args after "submodule ... foreach".
 320         while test $# -ne 0
 321         do
 322                 case "$1" in
 323                 -q|--quiet)
 324                         GIT_QUIET=1
 325                         ;;
 326                 --recursive)
 327                         recursive=1
 328                         ;;
 329                 -*)
 330                         usage
 331                         ;;
 332                 *)
 333                         break
 334                         ;;
 335                 esac
 336                 shift
 337         done
 338
 339         toplevel=$(pwd)
 340
 341         # dup stdin so that it can be restored when running the external
 342         # command in the subshell (and a recursive call to this function)
 343         exec 3<&0
 344
 345         module_list |
 346         while read mode sha1 stage path
 347         do
 348                 if test -e "$path"/.git
 349                 then
 350                         say "$(eval_gettext "Entering '\$prefix\$path'")"
 351                         name=$(module_name "$path")
 352                         (
 353                                 prefix="$prefix$path/"
 354                                 clear_local_git_env
 355                                 cd "$path" &&
 356                                 eval "$@" &&
 357                                 if test -n "$recursive"
 358                                 then
 359                                         cmd_foreach "--recursive" "$@"
 360                                 fi
 361                         ) <&3 3<&- ||
 362                         die "$(eval_gettext "Stopping at '\$path'; script returned non-zero status.")"
 363                 fi
 364         done
 365 }
 366
 367 #
 368 # Register submodules in .git/config
 369 #
 370 # $@ = requested paths (default to all)
 371 #
 372 cmd_init()
 373 {
 374         # parse $args after "submodule ... init".
 375         while test $# -ne 0
 376         do
 377                 case "$1" in
 378                 -q|--quiet)
 379                         GIT_QUIET=1
 380                         ;;
 381                 --)
 382                         shift
 383                         break
 384                         ;;
 385                 -*)
 386                         usage
 387                         ;;
 388                 *)
 389                         break
 390                         ;;
 391                 esac
 392                 shift
 393         done
 394
 395         module_list "$@" |
 396         while read mode sha1 stage path
 397         do
 398                 # Skip already registered paths
 399                 name=$(module_name "$path") || exit
 400                 if test -z "$(git config "submodule.$name.url")"
 401                 then
 402                         url=$(git config -f .gitmodules submodule."$name".url)
 403                         test -z "$url" &&
 404                         die "$(eval_gettext "No url found for submodule path '\$path' in .gitmodules")"
 405
 406                         # Possibly a url relative to parent
 407                         case "$url" in
 408                         ./*|../*)
 409                                 url=$(resolve_relative_url "$url") || exit
 410                                 ;;
 411                         esac
 412                         git config submodule."$name".url "$url" ||
 413                         die "$(eval_gettext "Failed to register url for submodule path '\$path'")"
 414                 fi
 415
 416                 # Copy "update" setting when it is not set yet
 417                 upd="$(git config -f .gitmodules submodule."$name".update)"
 418                 test -z "$upd" ||
 419                 test -n "$(git config submodule."$name".update)" ||
 420                 git config submodule."$name".update "$upd" ||
 421                 die "$(eval_gettext "Failed to register update mode for submodule path '\$path'")"
 422
 423                 say "$(eval_gettext "Submodule '\$name' (\$url) registered for path '\$path'")"
 424         done
 425 }
 426
 427 #
 428 # Update each submodule path to correct revision, using clone and checkout as needed
 429 #
 430 # $@ = requested paths (default to all)
 431 #
 432 cmd_update()
 433 {
 434         # parse $args after "submodule ... update".
 435         orig_flags=
 436         while test $# -ne 0
 437         do
 438                 case "$1" in
 439                 -q|--quiet)
 440                         GIT_QUIET=1
 441                         ;;
 442                 -i|--init)
 443                         init=1
 444                         ;;
 445                 -N|--no-fetch)
 446                         nofetch=1
 447                         ;;
 448                 -f|--force)
 449                         force=$1
 450                         ;;
 451                 -r|--rebase)
 452                         update="rebase"
 453                         ;;
 454                 --reference)
 455                         case "$2" in '') usage ;; esac
 456                         reference="--reference=$2"
 457                         orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 458                         shift
 459                         ;;
 460                 --reference=*)
 461                         reference="$1"
 462                         ;;
 463                 -m|--merge)
 464                         update="merge"
 465                         ;;
 466                 --recursive)
 467                         recursive=1
 468                         ;;
 469                 --checkout)
 470                         update="checkout"
 471                         ;;
 472                 --)
 473                         shift
 474                         break
 475                         ;;
 476                 -*)
 477                         usage
 478                         ;;
 479                 *)
 480                         break
 481                         ;;
 482                 esac
 483                 orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 484                 shift
 485         done
 486
 487         if test -n "$init"
 488         then
 489                 cmd_init "--" "$@" || return
 490         fi
 491
 492         cloned_modules=
 493         module_list "$@" | {
 494         err=
 495         while read mode sha1 stage path
 496         do
 497                 if test "$stage" = U
 498                 then
 499                         echo >&2 "Skipping unmerged submodule $path"
 500                         continue
 501                 fi
 502                 name=$(module_name "$path") || exit
 503                 url=$(git config submodule."$name".url)
 504                 if ! test -z "$update"
 505                 then
 506                         update_module=$update
 507                 else
 508                         update_module=$(git config submodule."$name".update)
 509                 fi
 510
 511                 if test "$update_module" = "none"
 512                 then
 513                         echo "Skipping submodule '$path'"
 514                         continue
 515                 fi
 516
 517                 if test -z "$url"
 518                 then
 519                         # Only mention uninitialized submodules when its
 520                         # path have been specified
 521                         test "$#" != "0" &&
 522                         say "$(eval_gettext "Submodule path '\$path' not initialized
 523 Maybe you want to use 'update --init'?")"
 524                         continue
 525                 fi
 526
 527                 if ! test -d "$path"/.git -o -f "$path"/.git
 528                 then
 529                         module_clone "$path" "$url" "$reference"|| exit
 530                         cloned_modules="$cloned_modules;$name"
 531                         subsha1=
 532                 else
 533                         subsha1=$(clear_local_git_env; cd "$path" &&
 534                                 git rev-parse --verify HEAD) ||
 535                         die "$(eval_gettext "Unable to find current revision in submodule path '\$path'")"
 536                 fi
 537
 538                 if test "$subsha1" != "$sha1"
 539                 then
 540                         subforce=$force
 541                         # If we don't already have a -f flag and the submodule has never been checked out
 542                         if test -z "$subsha1" -a -z "$force"
 543                         then
 544                                 subforce="-f"
 545                         fi
 546
 547                         if test -z "$nofetch"
 548                         then
 549                                 # Run fetch only if $sha1 isn't present or it
 550                                 # is not reachable from a ref.
 551                                 (clear_local_git_env; cd "$path" &&
 552                                         ( (rev=$(git rev-list -n 1 $sha1 --not --all 2>/dev/null) &&
 553                                          test -z "$rev") || git-fetch)) ||
 554                                 die "$(eval_gettext "Unable to fetch in submodule path '\$path'")"
 555                         fi
 556
 557                         # Is this something we just cloned?
 558                         case ";$cloned_modules;" in
 559                         *";$name;"*)
 560                                 # then there is no local change to integrate
 561                                 update_module= ;;
 562                         esac
 563
 564                         must_die_on_failure=
 565                         case "$update_module" in
 566                         rebase)
 567                                 command="git rebase"
 568                                 die_msg="$(eval_gettext "Unable to rebase '\$sha1' in submodule path '\$path'")"
 569                                 say_msg="$(eval_gettext "Submodule path '\$path': rebased into '\$sha1'")"
 570                                 must_die_on_failure=yes
 571                                 ;;
 572                         merge)
 573                                 command="git merge"
 574                                 die_msg="$(eval_gettext "Unable to merge '\$sha1' in submodule path '\$path'")"
 575                                 say_msg="$(eval_gettext "Submodule path '\$path': merged in '\$sha1'")"
 576                                 must_die_on_failure=yes
 577                                 ;;
 578                         *)
 579                                 command="git checkout $subforce -q"
 580                                 die_msg="$(eval_gettext "Unable to checkout '\$sha1' in submodule path '\$path'")"
 581                                 say_msg="$(eval_gettext "Submodule path '\$path': checked out '\$sha1'")"
 582                                 ;;
 583                         esac
 584
 585                         if (clear_local_git_env; cd "$path" && $command "$sha1")
 586                         then
 587                                 say "$say_msg"
 588                         elif test -n "$must_die_on_failure"
 589                         then
 590                                 die_with_status 2 "$die_msg"
 591                         else
 592                                 err="${err};$die_msg"
 593                                 continue
 594                         fi
 595                 fi
 596
 597                 if test -n "$recursive"
 598                 then
 599                         (clear_local_git_env; cd "$path" && eval cmd_update "$orig_flags")
 600                         res=$?
 601                         if test $res -gt 0
 602                         then
 603                                 die_msg="$(eval_gettext "Failed to recurse into submodule path '\$path'")"
 604                                 if test $res -eq 1
 605                                 then
 606                                         err="${err};$die_msg"
 607                                         continue
 608                                 else
 609                                         die_with_status $res "$die_msg"
 610                                 fi
 611                         fi
 612                 fi
 613         done
 614
 615         if test -n "$err"
 616         then
 617                 OIFS=$IFS
 618                 IFS=';'
 619                 for e in $err
 620                 do
 621                         if test -n "$e"
 622                         then
 623                                 echo >&2 "$e"
 624                         fi
 625                 done
 626                 IFS=$OIFS
 627                 exit 1
 628         fi
 629         }
 630 }
 631
 632 set_name_rev () {
 633         revname=$( (
 634                 clear_local_git_env
 635                 cd "$1" && {
 636                         git describe "$2" 2>/dev/null ||
 637                         git describe --tags "$2" 2>/dev/null ||
 638                         git describe --contains "$2" 2>/dev/null ||
 639                         git describe --all --always "$2"
 640                 }
 641         ) )
 642         test -z "$revname" || revname=" ($revname)"
 643 }
 644 #
 645 # Show commit summary for submodules in index or working tree
 646 #
 647 # If '--cached' is given, show summary between index and given commit,
 648 # or between working tree and given commit
 649 #
 650 # $@ = [commit (default 'HEAD'),] requested paths (default all)
 651 #
 652 cmd_summary() {
 653         summary_limit=-1
 654         for_status=
 655         diff_cmd=diff-index
 656
 657         # parse $args after "submodule ... summary".
 658         while test $# -ne 0
 659         do
 660                 case "$1" in
 661                 --cached)
 662                         cached="$1"
 663                         ;;
 664                 --files)
 665                         files="$1"
 666                         ;;
 667                 --for-status)
 668                         for_status="$1"
 669                         ;;
 670                 -n|--summary-limit)
 671                         if summary_limit=$(($2 + 0)) 2>/dev/null && test "$summary_limit" = "$2"
 672                         then
 673                                 :
 674                         else
 675                                 usage
 676                         fi
 677                         shift
 678                         ;;
 679                 --)
 680                         shift
 681                         break
 682                         ;;
 683                 -*)
 684                         usage
 685                         ;;
 686                 *)
 687                         break
 688                         ;;
 689                 esac
 690                 shift
 691         done
 692
 693         test $summary_limit = 0 && return
 694
 695         if rev=$(git rev-parse -q --verify --default HEAD ${1+"$1"})
 696         then
 697                 head=$rev
 698                 test $# = 0 || shift
 699         elif test -z "$1" -o "$1" = "HEAD"
 700         then
 701                 # before the first commit: compare with an empty tree
 702                 head=$(git hash-object -w -t tree --stdin </dev/null)
 703                 test -z "$1" || shift
 704         else
 705                 head="HEAD"
 706         fi
 707
 708         if [ -n "$files" ]
 709         then
 710                 test -n "$cached" &&
 711                 die "$(gettext -- "--cached cannot be used with --files")"
 712                 diff_cmd=diff-files
 713                 head=
 714         fi
 715
 716         cd_to_toplevel
 717         # Get modified modules cared by user
 718         modules=$(git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- "$@" |
 719                 sane_egrep '^:([0-7]* )?160000' |
 720                 while read mod_src mod_dst sha1_src sha1_dst status name
 721                 do
 722                         # Always show modules deleted or type-changed (blob<->module)
 723                         test $status = D -o $status = T && echo "$name" && continue
 724                         # Also show added or modified modules which are checked out
 725                         GIT_DIR="$name/.git" git-rev-parse --git-dir >/dev/null 2>&1 &&
 726                         echo "$name"
 727                 done
 728         )
 729
 730         test -z "$modules" && return
 731
 732         git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- $modules |
 733         sane_egrep '^:([0-7]* )?160000' |
 734         cut -c2- |
 735         while read mod_src mod_dst sha1_src sha1_dst status name
 736         do
 737                 if test -z "$cached" &&
 738                         test $sha1_dst = 0000000000000000000000000000000000000000
 739                 then
 740                         case "$mod_dst" in
 741                         160000)
 742                                 sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
 743                                 ;;
 744                         100644 | 100755 | 120000)
 745                                 sha1_dst=$(git hash-object $name)
 746                                 ;;
 747                         000000)
 748                                 ;; # removed
 749                         *)
 750                                 # unexpected type
 751                                 eval_gettextln "unexpected mode \$mod_dst" >&2
 752                                 continue ;;
 753                         esac
 754                 fi
 755                 missing_src=
 756                 missing_dst=
 757
 758                 test $mod_src = 160000 &&
 759                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_src^0 >/dev/null &&
 760                 missing_src=t
 761
 762                 test $mod_dst = 160000 &&
 763                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_dst^0 >/dev/null &&
 764                 missing_dst=t
 765
 766                 total_commits=
 767                 case "$missing_src,$missing_dst" in
 768                 t,)
 769                         errmsg="$(eval_gettext "  Warn: \$name doesn't contain commit \$sha1_src")"
 770                         ;;
 771                 ,t)
 772                         errmsg="$(eval_gettext "  Warn: \$name doesn't contain commit \$sha1_dst")"
 773                         ;;
 774                 t,t)
 775                         errmsg="$(eval_gettext "  Warn: \$name doesn't contain commits \$sha1_src and \$sha1_dst")"
 776                         ;;
 777                 *)
 778                         errmsg=
 779                         total_commits=$(
 780                         if test $mod_src = 160000 -a $mod_dst = 160000
 781                         then
 782                                 range="$sha1_src...$sha1_dst"
 783                         elif test $mod_src = 160000
 784                         then
 785                                 range=$sha1_src
 786                         else
 787                                 range=$sha1_dst
 788                         fi
 789                         GIT_DIR="$name/.git" \
 790                         git rev-list --first-parent $range -- | wc -l
 791                         )
 792                         total_commits=" ($(($total_commits + 0)))"
 793                         ;;
 794                 esac
 795
 796                 sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
 797                 sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
 798                 if test $status = T
 799                 then
 800                         blob="$(gettext "blob")"
 801                         submodule="$(gettext "submodule")"
 802                         if test $mod_dst = 160000
 803                         then
 804                                 echo "* $name $sha1_abbr_src($blob)->$sha1_abbr_dst($submodule)$total_commits:"
 805                         else
 806                                 echo "* $name $sha1_abbr_src($submodule)->$sha1_abbr_dst($blob)$total_commits:"
 807                         fi
 808                 else
 809                         echo "* $name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
 810                 fi
 811                 if test -n "$errmsg"
 812                 then
 813                         # Don't give error msg for modification whose dst is not submodule
 814                         # i.e. deleted or changed to blob
 815                         test $mod_dst = 160000 && echo "$errmsg"
 816                 else
 817                         if test $mod_src = 160000 -a $mod_dst = 160000
 818                         then
 819                                 limit=
 820                                 test $summary_limit -gt 0 && limit="-$summary_limit"
 821                                 GIT_DIR="$name/.git" \
 822                                 git log $limit --pretty='format:  %m %s' \
 823                                 --first-parent $sha1_src...$sha1_dst
 824                         elif test $mod_dst = 160000
 825                         then
 826                                 GIT_DIR="$name/.git" \
 827                                 git log --pretty='format:  > %s' -1 $sha1_dst
 828                         else
 829                                 GIT_DIR="$name/.git" \
 830                                 git log --pretty='format:  < %s' -1 $sha1_src
 831                         fi
 832                         echo
 833                 fi
 834                 echo
 835         done |
 836         if test -n "$for_status"; then
 837                 if [ -n "$files" ]; then
 838                         gettextln "# Submodules changed but not updated:"
 839                 else
 840                         gettextln "# Submodule changes to be committed:"
 841                 fi
 842                 echo "#"
 843                 sed -e 's|^|# |' -e 's|^# $|#|'
 844         else
 845                 cat
 846         fi
 847 }
 848 #
 849 # List all submodules, prefixed with:
 850 #  - submodule not initialized
 851 #  + different revision checked out
 852 #
 853 # If --cached was specified the revision in the index will be printed
 854 # instead of the currently checked out revision.
 855 #
 856 # $@ = requested paths (default to all)
 857 #
 858 cmd_status()
 859 {
 860         # parse $args after "submodule ... status".
 861         orig_flags=
 862         while test $# -ne 0
 863         do
 864                 case "$1" in
 865                 -q|--quiet)
 866                         GIT_QUIET=1
 867                         ;;
 868                 --cached)
 869                         cached=1
 870                         ;;
 871                 --recursive)
 872                         recursive=1
 873                         ;;
 874                 --)
 875                         shift
 876                         break
 877                         ;;
 878                 -*)
 879                         usage
 880                         ;;
 881                 *)
 882                         break
 883                         ;;
 884                 esac
 885                 orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
 886                 shift
 887         done
 888
 889         module_list "$@" |
 890         while read mode sha1 stage path
 891         do
 892                 name=$(module_name "$path") || exit
 893                 url=$(git config submodule."$name".url)
 894                 displaypath="$prefix$path"
 895                 if test "$stage" = U
 896                 then
 897                         say "U$sha1 $displaypath"
 898                         continue
 899                 fi
 900                 if test -z "$url" || ! test -d "$path"/.git -o -f "$path"/.git
 901                 then
 902                         say "-$sha1 $displaypath"
 903                         continue;
 904                 fi
 905                 set_name_rev "$path" "$sha1"
 906                 if git diff-files --ignore-submodules=dirty --quiet -- "$path"
 907                 then
 908                         say " $sha1 $displaypath$revname"
 909                 else
 910                         if test -z "$cached"
 911                         then
 912                                 sha1=$(clear_local_git_env; cd "$path" && git rev-parse --verify HEAD)
 913                                 set_name_rev "$path" "$sha1"
 914                         fi
 915                         say "+$sha1 $displaypath$revname"
 916                 fi
 917
 918                 if test -n "$recursive"
 919                 then
 920                         (
 921                                 prefix="$displaypath/"
 922                                 clear_local_git_env
 923                                 cd "$path" &&
 924                                 eval cmd_status "$orig_args"
 925                         ) ||
 926                         die "$(eval_gettext "Failed to recurse into submodule path '\$path'")"
 927                 fi
 928         done
 929 }
 930 #
 931 # Sync remote urls for submodules
 932 # This makes the value for remote.$remote.url match the value
 933 # specified in .gitmodules.
 934 #
 935 cmd_sync()
 936 {
 937         while test $# -ne 0
 938         do
 939                 case "$1" in
 940                 -q|--quiet)
 941                         GIT_QUIET=1
 942                         shift
 943                         ;;
 944                 --)
 945                         shift
 946                         break
 947                         ;;
 948                 -*)
 949                         usage
 950                         ;;
 951                 *)
 952                         break
 953                         ;;
 954                 esac
 955         done
 956         cd_to_toplevel
 957         module_list "$@" |
 958         while read mode sha1 stage path
 959         do
 960                 name=$(module_name "$path")
 961                 url=$(git config -f .gitmodules --get submodule."$name".url)
 962
 963                 # Possibly a url relative to parent
 964                 case "$url" in
 965                 ./*|../*)
 966                         url=$(resolve_relative_url "$url") || exit
 967                         ;;
 968                 esac
 969
 970                 if git config "submodule.$name.url" >/dev/null 2>/dev/null
 971                 then
 972                         say "$(eval_gettext "Synchronizing submodule url for '\$name'")"
 973                         git config submodule."$name".url "$url"
 974
 975                         if test -e "$path"/.git
 976                         then
 977                         (
 978                                 clear_local_git_env
 979                                 cd "$path"
 980                                 remote=$(get_default_remote)
 981                                 git config remote."$remote".url "$url"
 982                         )
 983                         fi
 984                 fi
 985         done
 986 }
 987
 988 # This loop parses the command line arguments to find the
 989 # subcommand name to dispatch.  Parsing of the subcommand specific
 990 # options are primarily done by the subcommand implementations.
 991 # Subcommand specific options such as --branch and --cached are
 992 # parsed here as well, for backward compatibility.
 993
 994 while test $# != 0 && test -z "$command"
 995 do
 996         case "$1" in
 997         add | foreach | init | update | status | summary | sync)
 998                 command=$1
 999                 ;;
1000         -q|--quiet)
1001                 GIT_QUIET=1
1002                 ;;
1003         -b|--branch)
1004                 case "$2" in
1005                 '')
1006                         usage
1007                         ;;
1008                 esac
1009                 branch="$2"; shift
1010                 ;;
1011         --cached)
1012                 cached="$1"
1013                 ;;
1014         --)
1015                 break
1016                 ;;
1017         -*)
1018                 usage
1019                 ;;
1020         *)
1021                 break
1022                 ;;
1023         esac
1024         shift
1025 done
1026
1027 # No command word defaults to "status"
1028 test -n "$command" || command=status
1029
1030 # "-b branch" is accepted only by "add"
1031 if test -n "$branch" && test "$command" != add
1032 then
1033         usage
1034 fi
1035
1036 # "--cached" is accepted only by "status" and "summary"
1037 if test -n "$cached" && test "$command" != status -a "$command" != summary
1038 then
1039         usage
1040 fi
1041
1042 "cmd_$command" "$@"