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