git-submodule.sh

   1 #!/bin/sh
   2 #
   3 # git-submodule.sh: add, init, update or list git submodules
   4 #
   5 # Copyright (c) 2007 Lars Hjemli
   6
   7 dashless=$(basename "$0" | sed -e 's/-/ /')
   8 USAGE="[--quiet] add [-b <branch>] [-f|--force] [--name <name>] [--reference <repository>] [--] <repository> [<path>]
   9    or: $dashless [--quiet] status [--cached] [--recursive] [--] [<path>...]
  10    or: $dashless [--quiet] init [--] [<path>...]
  11    or: $dashless [--quiet] deinit [-f|--force] [--] <path>...
  12    or: $dashless [--quiet] update [--init] [--remote] [-N|--no-fetch] [-f|--force] [--rebase] [--reference <repository>] [--merge] [--recursive] [--] [<path>...]
  13    or: $dashless [--quiet] summary [--cached|--files] [--summary-limit <n>] [commit] [--] [<path>...]
  14    or: $dashless [--quiet] foreach [--recursive] <command>
  15    or: $dashless [--quiet] sync [--recursive] [--] [<path>...]"
  16 OPTIONS_SPEC=
  17 SUBDIRECTORY_OK=Yes
  18 . git-sh-setup
  19 . git-sh-i18n
  20 . git-parse-remote
  21 require_work_tree
  22 wt_prefix=$(git rev-parse --show-prefix)
  23 cd_to_toplevel
  24
  25 command=
  26 branch=
  27 force=
  28 reference=
  29 cached=
  30 recursive=
  31 init=
  32 files=
  33 remote=
  34 nofetch=
  35 update=
  36 prefix=
  37 custom_name=
  38 depth=
  39
  40 # The function takes at most 2 arguments. The first argument is the
  41 # URL that navigates to the submodule origin repo. When relative, this URL
  42 # is relative to the superproject origin URL repo. The second up_path
  43 # argument, if specified, is the relative path that navigates
  44 # from the submodule working tree to the superproject working tree.
  45 #
  46 # The output of the function is the origin URL of the submodule.
  47 #
  48 # The output will either be an absolute URL or filesystem path (if the
  49 # superproject origin URL is an absolute URL or filesystem path,
  50 # respectively) or a relative file system path (if the superproject
  51 # origin URL is a relative file system path).
  52 #
  53 # When the output is a relative file system path, the path is either
  54 # relative to the submodule working tree, if up_path is specified, or to
  55 # the superproject working tree otherwise.
  56 resolve_relative_url ()
  57 {
  58         remote=$(get_default_remote)
  59         remoteurl=$(git config "remote.$remote.url") ||
  60                 remoteurl=$(pwd) # the repository is its own authoritative upstream
  61         url="$1"
  62         remoteurl=${remoteurl%/}
  63         sep=/
  64         up_path="$2"
  65
  66         case "$remoteurl" in
  67         *:*|/*)
  68                 is_relative=
  69                 ;;
  70         ./*|../*)
  71                 is_relative=t
  72                 ;;
  73         *)
  74                 is_relative=t
  75                 remoteurl="./$remoteurl"
  76                 ;;
  77         esac
  78
  79         while test -n "$url"
  80         do
  81                 case "$url" in
  82                 ../*)
  83                         url="${url#../}"
  84                         case "$remoteurl" in
  85                         */*)
  86                                 remoteurl="${remoteurl%/*}"
  87                                 ;;
  88                         *:*)
  89                                 remoteurl="${remoteurl%:*}"
  90                                 sep=:
  91                                 ;;
  92                         *)
  93                                 if test -z "$is_relative" || test "." = "$remoteurl"
  94                                 then
  95                                         die "$(eval_gettext "cannot strip one component off url '\$remoteurl'")"
  96                                 else
  97                                         remoteurl=.
  98                                 fi
  99                                 ;;
 100                         esac
 101                         ;;
 102                 ./*)
 103                         url="${url#./}"
 104                         ;;
 105                 *)
 106                         break;;
 107                 esac
 108         done
 109         remoteurl="$remoteurl$sep${url%/}"
 110         echo "${is_relative:+${up_path}}${remoteurl#./}"
 111 }
 112
 113 # Resolve a path to be relative to another path.  This is intended for
 114 # converting submodule paths when git-submodule is run in a subdirectory
 115 # and only handles paths where the directory separator is '/'.
 116 #
 117 # The output is the first argument as a path relative to the second argument,
 118 # which defaults to $wt_prefix if it is omitted.
 119 relative_path ()
 120 {
 121         local target curdir result
 122         target=$1
 123         curdir=${2-$wt_prefix}
 124         curdir=${curdir%/}
 125         result=
 126
 127         while test -n "$curdir"
 128         do
 129                 case "$target" in
 130                 "$curdir/"*)
 131                         target=${target#"$curdir"/}
 132                         break
 133                         ;;
 134                 esac
 135
 136                 result="${result}../"
 137                 if test "$curdir" = "${curdir%/*}"
 138                 then
 139                         curdir=
 140                 else
 141                         curdir="${curdir%/*}"
 142                 fi
 143         done
 144
 145         echo "$result$target"
 146 }
 147
 148 #
 149 # Get submodule info for registered submodules
 150 # $@ = path to limit submodule list
 151 #
 152 module_list()
 153 {
 154         eval "set $(git rev-parse --sq --prefix "$wt_prefix" -- "$@")"
 155         (
 156                 git ls-files -z --error-unmatch --stage -- "$@" ||
 157                 echo "unmatched pathspec exists"
 158         ) |
 159         @@PERL@@ -e '
 160         my %unmerged = ();
 161         my ($null_sha1) = ("0" x 40);
 162         my @out = ();
 163         my $unmatched = 0;
 164         $/ = "\0";
 165         while (<STDIN>) {
 166                 if (/^unmatched pathspec/) {
 167                         $unmatched = 1;
 168                         next;
 169                 }
 170                 chomp;
 171                 my ($mode, $sha1, $stage, $path) =
 172                         /^([0-7]+) ([0-9a-f]{40}) ([0-3])\t(.*)$/;
 173                 next unless $mode eq "160000";
 174                 if ($stage ne "0") {
 175                         if (!$unmerged{$path}++) {
 176                                 push @out, "$mode $null_sha1 U\t$path\n";
 177                         }
 178                         next;
 179                 }
 180                 push @out, "$_\n";
 181         }
 182         if ($unmatched) {
 183                 print "#unmatched\n";
 184         } else {
 185                 print for (@out);
 186         }
 187         '
 188 }
 189
 190 die_if_unmatched ()
 191 {
 192         if test "$1" = "#unmatched"
 193         then
 194                 exit 1
 195         fi
 196 }
 197
 198 #
 199 # Print a submodule configuration setting
 200 #
 201 # $1 = submodule name
 202 # $2 = option name
 203 # $3 = default value
 204 #
 205 # Checks in the usual git-config places first (for overrides),
 206 # otherwise it falls back on .gitmodules.  This allows you to
 207 # distribute project-wide defaults in .gitmodules, while still
 208 # customizing individual repositories if necessary.  If the option is
 209 # not in .gitmodules either, print a default value.
 210 #
 211 get_submodule_config () {
 212         name="$1"
 213         option="$2"
 214         default="$3"
 215         value=$(git config submodule."$name"."$option")
 216         if test -z "$value"
 217         then
 218                 value=$(git config -f .gitmodules submodule."$name"."$option")
 219         fi
 220         printf '%s' "${value:-$default}"
 221 }
 222
 223
 224 #
 225 # Map submodule path to submodule name
 226 #
 227 # $1 = path
 228 #
 229 module_name()
 230 {
 231         # Do we have "submodule.<something>.path = $1" defined in .gitmodules file?
 232         sm_path="$1"
 233         re=$(printf '%s\n' "$1" | sed -e 's/[].[^$\\*]/\\&/g')
 234         name=$( git config -f .gitmodules --get-regexp '^submodule\..*\.path$' |
 235                 sed -n -e 's|^submodule\.\(.*\)\.path '"$re"'$|\1|p' )
 236         test -z "$name" &&
 237         die "$(eval_gettext "No submodule mapping found in .gitmodules for path '\$sm_path'")"
 238         echo "$name"
 239 }
 240
 241 #
 242 # Clone a submodule
 243 #
 244 # $1 = submodule path
 245 # $2 = submodule name
 246 # $3 = URL to clone
 247 # $4 = reference repository to reuse (empty for independent)
 248 # $5 = depth argument for shallow clones (empty for deep)
 249 # $6 = (remote-tracking) starting point for the local branch (empty for HEAD)
 250 # $7 = local branch to create (empty for a detached HEAD, unless $6 is
 251 #      also empty, in which case the local branch is left unchanged)
 252 #
 253 # Prior to calling, cmd_update checks that a possibly existing
 254 # path is not a git repository.
 255 # Likewise, cmd_add checks that path does not exist at all,
 256 # since it is the location of a new submodule.
 257 #
 258 module_clone()
 259 {
 260         sm_path=$1
 261         name=$2
 262         url=$3
 263         reference="$4"
 264         depth="$5"
 265         start_point="$6"
 266         local_branch="$7"
 267         quiet=
 268         if test -n "$GIT_QUIET"
 269         then
 270                 quiet=-q
 271         fi
 272
 273         gitdir=
 274         gitdir_base=
 275         base_name=$(dirname "$name")
 276
 277         gitdir=$(git rev-parse --git-dir)
 278         gitdir_base="$gitdir/modules/$base_name"
 279         gitdir="$gitdir/modules/$name"
 280
 281         if test -d "$gitdir"
 282         then
 283                 mkdir -p "$sm_path"
 284                 rm -f "$gitdir/index"
 285         else
 286                 mkdir -p "$gitdir_base"
 287                 (
 288                         clear_local_git_env
 289                         git clone $quiet ${depth:+"$depth"} -n ${reference:+"$reference"} \
 290                                 --separate-git-dir "$gitdir" "$url" "$sm_path"
 291                 ) ||
 292                 die "$(eval_gettext "Clone of '\$url' into submodule path '\$sm_path' failed")"
 293         fi
 294
 295         # We already are at the root of the work tree but cd_to_toplevel will
 296         # resolve any symlinks that might be present in $PWD
 297         a=$(cd_to_toplevel && cd "$gitdir" && pwd)/
 298         b=$(cd_to_toplevel && cd "$sm_path" && pwd)/
 299         # normalize Windows-style absolute paths to POSIX-style absolute paths
 300         case $a in [a-zA-Z]:/*) a=/${a%%:*}${a#*:} ;; esac
 301         case $b in [a-zA-Z]:/*) b=/${b%%:*}${b#*:} ;; esac
 302         # Remove all common leading directories after a sanity check
 303         if test "${a#$b}" != "$a" || test "${b#$a}" != "$b"; then
 304                 die "$(eval_gettext "Gitdir '\$a' is part of the submodule path '\$b' or vice versa")"
 305         fi
 306         while test "${a%%/*}" = "${b%%/*}"
 307         do
 308                 a=${a#*/}
 309                 b=${b#*/}
 310         done
 311         # Now chop off the trailing '/'s that were added in the beginning
 312         a=${a%/}
 313         b=${b%/}
 314
 315         # Turn each leading "*/" component into "../"
 316         rel=$(echo $b | sed -e 's|[^/][^/]*|..|g')
 317         echo "gitdir: $rel/$a" >"$sm_path/.git"
 318
 319         rel=$(echo $a | sed -e 's|[^/][^/]*|..|g')
 320         (
 321                 clear_local_git_env
 322                 cd "$sm_path" &&
 323                 GIT_WORK_TREE=. git config core.worktree "$rel/$b" &&
 324                 # ash fails to wordsplit ${local_branch:+-B "$local_branch"...}
 325                 case "$local_branch" in
 326                 '') git checkout -f -q ${start_point:+"$start_point"} ;;
 327                 ?*) git checkout -f -q -B "$local_branch" ${start_point:+"$start_point"} ;;
 328                 esac
 329         ) || die "$(eval_gettext "Unable to setup cloned submodule '\$sm_path'")"
 330 }
 331
 332 isnumber()
 333 {
 334         n=$(($1 + 0)) 2>/dev/null && test "$n" = "$1"
 335 }
 336
 337 #
 338 # Add a new submodule to the working tree, .gitmodules and the index
 339 #
 340 # $@ = repo path
 341 #
 342 # optional branch is stored in global branch variable
 343 #
 344 cmd_add()
 345 {
 346         # parse $args after "submodule ... add".
 347         reference_path=
 348         while test $# -ne 0
 349         do
 350                 case "$1" in
 351                 -b | --branch)
 352                         case "$2" in '') usage ;; esac
 353                         branch=$2
 354                         shift
 355                         ;;
 356                 -f | --force)
 357                         force=$1
 358                         ;;
 359                 -q|--quiet)
 360                         GIT_QUIET=1
 361                         ;;
 362                 --reference)
 363                         case "$2" in '') usage ;; esac
 364                         reference_path=$2
 365                         shift
 366                         ;;
 367                 --reference=*)
 368                         reference_path="${1#--reference=}"
 369                         ;;
 370                 --name)
 371                         case "$2" in '') usage ;; esac
 372                         custom_name=$2
 373                         shift
 374                         ;;
 375                 --depth)
 376                         case "$2" in '') usage ;; esac
 377                         depth="--depth=$2"
 378                         shift
 379                         ;;
 380                 --depth=*)
 381                         depth=$1
 382                         ;;
 383                 --)
 384                         shift
 385                         break
 386                         ;;
 387                 -*)
 388                         usage
 389                         ;;
 390                 *)
 391                         break
 392                         ;;
 393                 esac
 394                 shift
 395         done
 396
 397         if test -n "$reference_path"
 398         then
 399                 is_absolute_path "$reference_path" ||
 400                 reference_path="$wt_prefix$reference_path"
 401
 402                 reference="--reference=$reference_path"
 403         fi
 404
 405         repo=$1
 406         sm_path=$2
 407
 408         if test -z "$sm_path"; then
 409                 sm_path=$(echo "$repo" |
 410                         sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
 411         fi
 412
 413         if test -z "$repo" -o -z "$sm_path"; then
 414                 usage
 415         fi
 416
 417         is_absolute_path "$sm_path" || sm_path="$wt_prefix$sm_path"
 418
 419         # assure repo is absolute or relative to parent
 420         case "$repo" in
 421         ./*|../*)
 422                 test -z "$wt_prefix" ||
 423                 die "$(gettext "Relative path can only be used from the toplevel of the working tree")"
 424
 425                 # dereference source url relative to parent's url
 426                 realrepo=$(resolve_relative_url "$repo") || exit
 427                 ;;
 428         *:*|/*)
 429                 # absolute url
 430                 realrepo=$repo
 431                 ;;
 432         *)
 433                 die "$(eval_gettext "repo URL: '\$repo' must be absolute or begin with ./|../")"
 434         ;;
 435         esac
 436
 437         # normalize path:
 438         # multiple //; leading ./; /./; /../; trailing /
 439         sm_path=$(printf '%s/\n' "$sm_path" |
 440                 sed -e '
 441                         s|//*|/|g
 442                         s|^\(\./\)*||
 443                         s|/\./|/|g
 444                         :start
 445                         s|\([^/]*\)/\.\./||
 446                         tstart
 447                         s|/*$||
 448                 ')
 449         git ls-files --error-unmatch "$sm_path" > /dev/null 2>&1 &&
 450         die "$(eval_gettext "'\$sm_path' already exists in the index")"
 451
 452         if test -z "$force" && ! git add --dry-run --ignore-missing "$sm_path" > /dev/null 2>&1
 453         then
 454                 eval_gettextln "The following path is ignored by one of your .gitignore files:
 455 \$sm_path
 456 Use -f if you really want to add it." >&2
 457                 exit 1
 458         fi
 459
 460         if test -n "$custom_name"
 461         then
 462                 sm_name="$custom_name"
 463         else
 464                 sm_name="$sm_path"
 465         fi
 466
 467         # perhaps the path exists and is already a git repo, else clone it
 468         if test -e "$sm_path"
 469         then
 470                 if test -d "$sm_path"/.git -o -f "$sm_path"/.git
 471                 then
 472                         eval_gettextln "Adding existing repo at '\$sm_path' to the index"
 473                 else
 474                         die "$(eval_gettext "'\$sm_path' already exists and is not a valid git repo")"
 475                 fi
 476
 477         else
 478                 if test -d ".git/modules/$sm_name"
 479                 then
 480                         if test -z "$force"
 481                         then
 482                                 echo >&2 "$(eval_gettext "A git directory for '\$sm_name' is found locally with remote(s):")"
 483                                 GIT_DIR=".git/modules/$sm_name" GIT_WORK_TREE=. git remote -v | grep '(fetch)' | sed -e s,^,"  ", -e s,' (fetch)',, >&2
 484                                 echo >&2 "$(eval_gettext "If you want to reuse this local git directory instead of cloning again from")"
 485                                 echo >&2 "  $realrepo"
 486                                 echo >&2 "$(eval_gettext "use the '--force' option. If the local git directory is not the correct repo")"
 487                                 die "$(eval_gettext "or you are unsure what this means choose another name with the '--name' option.")"
 488                         else
 489                                 echo "$(eval_gettext "Reactivating local git directory for submodule '\$sm_name'.")"
 490                         fi
 491                 fi
 492                 if test -n "$branch"
 493                 then
 494                         start_point="origin/$branch"
 495                         local_branch="$branch"
 496                 else
 497                         start_point=""
 498                         local_branch=""
 499                 fi
 500                 module_clone "$sm_path" "$sm_name" "$realrepo" "$reference" "$depth" "$start_point" "$local_branch" || exit
 501         fi
 502         git config submodule."$sm_name".url "$realrepo"
 503
 504         git add $force "$sm_path" ||
 505         die "$(eval_gettext "Failed to add submodule '\$sm_path'")"
 506
 507         git config -f .gitmodules submodule."$sm_name".path "$sm_path" &&
 508         git config -f .gitmodules submodule."$sm_name".url "$repo" &&
 509         if test -n "$branch"
 510         then
 511                 git config -f .gitmodules submodule."$sm_name".branch "$branch"
 512         fi &&
 513         git add --force .gitmodules ||
 514         die "$(eval_gettext "Failed to register submodule '\$sm_path'")"
 515 }
 516
 517 #
 518 # Execute an arbitrary command sequence in each checked out
 519 # submodule
 520 #
 521 # $@ = command to execute
 522 #
 523 cmd_foreach()
 524 {
 525         # parse $args after "submodule ... foreach".
 526         while test $# -ne 0
 527         do
 528                 case "$1" in
 529                 -q|--quiet)
 530                         GIT_QUIET=1
 531                         ;;
 532                 --recursive)
 533                         recursive=1
 534                         ;;
 535                 -*)
 536                         usage
 537                         ;;
 538                 *)
 539                         break
 540                         ;;
 541                 esac
 542                 shift
 543         done
 544
 545         toplevel=$(pwd)
 546
 547         # dup stdin so that it can be restored when running the external
 548         # command in the subshell (and a recursive call to this function)
 549         exec 3<&0
 550
 551         module_list |
 552         while read mode sha1 stage sm_path
 553         do
 554                 die_if_unmatched "$mode"
 555                 if test -e "$sm_path"/.git
 556                 then
 557                         displaypath=$(relative_path "$sm_path")
 558                         say "$(eval_gettext "Entering '\$prefix\$displaypath'")"
 559                         name=$(module_name "$sm_path")
 560                         (
 561                                 prefix="$prefix$sm_path/"
 562                                 clear_local_git_env
 563                                 cd "$sm_path" &&
 564                                 sm_path=$(relative_path "$sm_path") &&
 565                                 # we make $path available to scripts ...
 566                                 path=$sm_path &&
 567                                 if test $# -eq 1
 568                                 then
 569                                         eval "$1"
 570                                 else
 571                                         "$@"
 572                                 fi &&
 573                                 if test -n "$recursive"
 574                                 then
 575                                         cmd_foreach "--recursive" "$@"
 576                                 fi
 577                         ) <&3 3<&- ||
 578                         die "$(eval_gettext "Stopping at '\$prefix\$displaypath'; script returned non-zero status.")"
 579                 fi
 580         done
 581 }
 582
 583 #
 584 # Register submodules in .git/config
 585 #
 586 # $@ = requested paths (default to all)
 587 #
 588 cmd_init()
 589 {
 590         # parse $args after "submodule ... init".
 591         while test $# -ne 0
 592         do
 593                 case "$1" in
 594                 -q|--quiet)
 595                         GIT_QUIET=1
 596                         ;;
 597                 --)
 598                         shift
 599                         break
 600                         ;;
 601                 -*)
 602                         usage
 603                         ;;
 604                 *)
 605                         break
 606                         ;;
 607                 esac
 608                 shift
 609         done
 610
 611         module_list "$@" |
 612         while read mode sha1 stage sm_path
 613         do
 614                 die_if_unmatched "$mode"
 615                 name=$(module_name "$sm_path") || exit
 616
 617                 displaypath=$(relative_path "$sm_path")
 618
 619                 # Copy url setting when it is not set yet
 620                 if test -z "$(git config "submodule.$name.url")"
 621                 then
 622                         url=$(git config -f .gitmodules submodule."$name".url)
 623                         test -z "$url" &&
 624                         die "$(eval_gettext "No url found for submodule path '\$displaypath' in .gitmodules")"
 625
 626                         # Possibly a url relative to parent
 627                         case "$url" in
 628                         ./*|../*)
 629                                 url=$(resolve_relative_url "$url") || exit
 630                                 ;;
 631                         esac
 632                         git config submodule."$name".url "$url" ||
 633                         die "$(eval_gettext "Failed to register url for submodule path '\$displaypath'")"
 634
 635                         say "$(eval_gettext "Submodule '\$name' (\$url) registered for path '\$displaypath'")"
 636                 fi
 637
 638                 # Copy "update" setting when it is not set yet
 639                 if upd="$(git config -f .gitmodules submodule."$name".update)" &&
 640                    test -n "$upd" &&
 641                    test -z "$(git config submodule."$name".update)"
 642                 then
 643                         case "$upd" in
 644                         checkout | rebase | merge | none)
 645                                 ;; # known modes of updating
 646                         *)
 647                                 echo >&2 "warning: unknown update mode '$upd' suggested for submodule '$name'"
 648                                 upd=none
 649                                 ;;
 650                         esac
 651                         git config submodule."$name".update "$upd" ||
 652                         die "$(eval_gettext "Failed to register update mode for submodule path '\$displaypath'")"
 653                 fi
 654         done
 655 }
 656
 657 #
 658 # Unregister submodules from .git/config and remove their work tree
 659 #
 660 # $@ = requested paths (use '.' to deinit all submodules)
 661 #
 662 cmd_deinit()
 663 {
 664         # parse $args after "submodule ... deinit".
 665         while test $# -ne 0
 666         do
 667                 case "$1" in
 668                 -f|--force)
 669                         force=$1
 670                         ;;
 671                 -q|--quiet)
 672                         GIT_QUIET=1
 673                         ;;
 674                 --)
 675                         shift
 676                         break
 677                         ;;
 678                 -*)
 679                         usage
 680                         ;;
 681                 *)
 682                         break
 683                         ;;
 684                 esac
 685                 shift
 686         done
 687
 688         if test $# = 0
 689         then
 690                 die "$(eval_gettext "Use '.' if you really want to deinitialize all submodules")"
 691         fi
 692
 693         module_list "$@" |
 694         while read mode sha1 stage sm_path
 695         do
 696                 die_if_unmatched "$mode"
 697                 name=$(module_name "$sm_path") || exit
 698
 699                 displaypath=$(relative_path "$sm_path")
 700
 701                 # Remove the submodule work tree (unless the user already did it)
 702                 if test -d "$sm_path"
 703                 then
 704                         # Protect submodules containing a .git directory
 705                         if test -d "$sm_path/.git"
 706                         then
 707                                 echo >&2 "$(eval_gettext "Submodule work tree '\$displaypath' contains a .git directory")"
 708                                 die "$(eval_gettext "(use 'rm -rf' if you really want to remove it including all of its history)")"
 709                         fi
 710
 711                         if test -z "$force"
 712                         then
 713                                 git rm -qn "$sm_path" ||
 714                                 die "$(eval_gettext "Submodule work tree '\$displaypath' contains local modifications; use '-f' to discard them")"
 715                         fi
 716                         rm -rf "$sm_path" &&
 717                         say "$(eval_gettext "Cleared directory '\$displaypath'")" ||
 718                         say "$(eval_gettext "Could not remove submodule work tree '\$displaypath'")"
 719                 fi
 720
 721                 mkdir "$sm_path" || say "$(eval_gettext "Could not create empty submodule directory '\$displaypath'")"
 722
 723                 # Remove the .git/config entries (unless the user already did it)
 724                 if test -n "$(git config --get-regexp submodule."$name\.")"
 725                 then
 726                         # Remove the whole section so we have a clean state when
 727                         # the user later decides to init this submodule again
 728                         url=$(git config submodule."$name".url)
 729                         git config --remove-section submodule."$name" 2>/dev/null &&
 730                         say "$(eval_gettext "Submodule '\$name' (\$url) unregistered for path '\$displaypath'")"
 731                 fi
 732         done
 733 }
 734
 735 #
 736 # Update each submodule path to correct revision, using clone and checkout as needed
 737 #
 738 # $@ = requested paths (default to all)
 739 #
 740 cmd_update()
 741 {
 742         # parse $args after "submodule ... update".
 743         while test $# -ne 0
 744         do
 745                 case "$1" in
 746                 -q|--quiet)
 747                         GIT_QUIET=1
 748                         ;;
 749                 -i|--init)
 750                         init=1
 751                         ;;
 752                 --remote)
 753                         remote=1
 754                         ;;
 755                 -N|--no-fetch)
 756                         nofetch=1
 757                         ;;
 758                 -f|--force)
 759                         force=$1
 760                         ;;
 761                 -r|--rebase)
 762                         update="rebase"
 763                         ;;
 764                 --reference)
 765                         case "$2" in '') usage ;; esac
 766                         reference="--reference=$2"
 767                         shift
 768                         ;;
 769                 --reference=*)
 770                         reference="$1"
 771                         ;;
 772                 -m|--merge)
 773                         update="merge"
 774                         ;;
 775                 --recursive)
 776                         recursive=1
 777                         ;;
 778                 --checkout)
 779                         update="checkout"
 780                         ;;
 781                 --depth)
 782                         case "$2" in '') usage ;; esac
 783                         depth="--depth=$2"
 784                         shift
 785                         ;;
 786                 --depth=*)
 787                         depth=$1
 788                         ;;
 789                 --)
 790                         shift
 791                         break
 792                         ;;
 793                 -*)
 794                         usage
 795                         ;;
 796                 *)
 797                         break
 798                         ;;
 799                 esac
 800                 shift
 801         done
 802
 803         if test -n "$init"
 804         then
 805                 cmd_init "--" "$@" || return
 806         fi
 807
 808         cloned_modules=
 809         module_list "$@" | {
 810         err=
 811         while read mode sha1 stage sm_path
 812         do
 813                 die_if_unmatched "$mode"
 814                 if test "$stage" = U
 815                 then
 816                         echo >&2 "Skipping unmerged submodule $prefix$sm_path"
 817                         continue
 818                 fi
 819                 name=$(module_name "$sm_path") || exit
 820                 url=$(git config submodule."$name".url)
 821                 config_branch=$(get_submodule_config "$name" branch)
 822                 branch="${config_branch:-master}"
 823                 local_branch="$branch"
 824                 if ! test -z "$update"
 825                 then
 826                         update_module=$update
 827                 else
 828                         update_module=$(git config submodule."$name".update)
 829                         if test -z "$update_module"
 830                         then
 831                                 update_module="checkout"
 832                         fi
 833                 fi
 834
 835                 displaypath=$(relative_path "$prefix$sm_path")
 836
 837                 case "$update_module" in
 838                 none)
 839                         echo "Skipping submodule '$displaypath'"
 840                         continue
 841                         ;;
 842                 checkout)
 843                         local_branch=""
 844                         ;;
 845                 rebase | merge | !*)
 846                         ;;
 847                 *)
 848                         die "$(eval_gettext "Invalid update mode '$update_module' for submodule '$name'")"
 849                 esac
 850
 851                 if test -z "$url"
 852                 then
 853                         # Only mention uninitialized submodules when its
 854                         # path have been specified
 855                         test "$#" != "0" &&
 856                         say "$(eval_gettext "Submodule path '\$displaypath' not initialized
 857 Maybe you want to use 'update --init'?")"
 858                         continue
 859                 fi
 860
 861                 if ! test -d "$sm_path"/.git -o -f "$sm_path"/.git
 862                 then
 863                         start_point="origin/${branch}"
 864                         module_clone "$sm_path" "$name" "$url" "$reference" "$depth" "$start_point" "$local_branch" || exit
 865                         cloned_modules="$cloned_modules;$name"
 866                         subsha1=
 867                 else
 868                         subsha1=$(clear_local_git_env; cd "$sm_path" &&
 869                                 git rev-parse --verify HEAD) ||
 870                         die "$(eval_gettext "Unable to find current revision in submodule path '\$displaypath'")"
 871                 fi
 872
 873                 if test -n "$remote"
 874                 then
 875                         if test -z "$nofetch"
 876                         then
 877                                 # Fetch remote before determining tracking $sha1
 878                                 (clear_local_git_env; cd "$sm_path" && git-fetch) ||
 879                                 die "$(eval_gettext "Unable to fetch in submodule path '\$sm_path'")"
 880                         fi
 881                         remote_name=$(clear_local_git_env; cd "$sm_path" && get_default_remote)
 882                         sha1=$(clear_local_git_env; cd "$sm_path" &&
 883                                 git rev-parse --verify "${remote_name}/${branch}") ||
 884                         die "$(eval_gettext "Unable to find current ${remote_name}/${branch} revision in submodule path '\$sm_path'")"
 885                 fi
 886
 887                 if test "$subsha1" != "$sha1" -o -n "$force"
 888                 then
 889                         subforce=$force
 890                         # If we don't already have a -f flag and the submodule has never been checked out
 891                         if test -z "$subsha1" -a -z "$force"
 892                         then
 893                                 subforce="-f"
 894                         fi
 895
 896                         if test -z "$nofetch"
 897                         then
 898                                 # Run fetch only if $sha1 isn't present or it
 899                                 # is not reachable from a ref.
 900                                 (clear_local_git_env; cd "$sm_path" &&
 901                                         ( (rev=$(git rev-list -n 1 $sha1 --not --all 2>/dev/null) &&
 902                                          test -z "$rev") || git-fetch)) ||
 903                                 die "$(eval_gettext "Unable to fetch in submodule path '\$displaypath'")"
 904                         fi
 905
 906                         # Is this something we just cloned?
 907                         case ";$cloned_modules;" in
 908                         *";$name;"*)
 909                                 # then there is no local change to integrate
 910                                 update_module='!git reset --hard -q'
 911                         esac
 912
 913                         must_die_on_failure=
 914                         case "$update_module" in
 915                         checkout)
 916                                 command="git checkout $subforce -q"
 917                                 die_msg="$(eval_gettext "Unable to checkout '\$sha1' in submodule path '\$displaypath'")"
 918                                 say_msg="$(eval_gettext "Submodule path '\$displaypath': checked out '\$sha1'")"
 919                                 ;;
 920                         rebase)
 921                                 command="git rebase"
 922                                 die_msg="$(eval_gettext "Unable to rebase '\$sha1' in submodule path '\$displaypath'")"
 923                                 say_msg="$(eval_gettext "Submodule path '\$displaypath': rebased into '\$sha1'")"
 924                                 must_die_on_failure=yes
 925                                 ;;
 926                         merge)
 927                                 command="git merge"
 928                                 die_msg="$(eval_gettext "Unable to merge '\$sha1' in submodule path '\$displaypath'")"
 929                                 say_msg="$(eval_gettext "Submodule path '\$displaypath': merged in '\$sha1'")"
 930                                 must_die_on_failure=yes
 931                                 ;;
 932                         !*)
 933                                 command="${update_module#!}"
 934                                 die_msg="$(eval_gettext "Execution of '\$command \$sha1' failed in submodule  path '\$prefix\$sm_path'")"
 935                                 say_msg="$(eval_gettext "Submodule path '\$prefix\$sm_path': '\$command \$sha1'")"
 936                                 must_die_on_failure=yes
 937                                 ;;
 938                         *)
 939                                 die "$(eval_gettext "Invalid update mode '$update_module' for submodule '$name'")"
 940                         esac
 941
 942                         if (clear_local_git_env; cd "$sm_path" && $command "$sha1")
 943                         then
 944                                 say "$say_msg"
 945                         elif test -n "$must_die_on_failure"
 946                         then
 947                                 die_with_status 2 "$die_msg"
 948                         else
 949                                 err="${err};$die_msg"
 950                                 continue
 951                         fi
 952                 fi
 953
 954                 if test -n "$recursive"
 955                 then
 956                         (
 957                                 prefix="$prefix$sm_path/"
 958                                 clear_local_git_env
 959                                 cd "$sm_path" &&
 960                                 eval cmd_update
 961                         )
 962                         res=$?
 963                         if test $res -gt 0
 964                         then
 965                                 die_msg="$(eval_gettext "Failed to recurse into submodule path '\$displaypath'")"
 966                                 if test $res -eq 1
 967                                 then
 968                                         err="${err};$die_msg"
 969                                         continue
 970                                 else
 971                                         die_with_status $res "$die_msg"
 972                                 fi
 973                         fi
 974                 fi
 975         done
 976
 977         if test -n "$err"
 978         then
 979                 OIFS=$IFS
 980                 IFS=';'
 981                 for e in $err
 982                 do
 983                         if test -n "$e"
 984                         then
 985                                 echo >&2 "$e"
 986                         fi
 987                 done
 988                 IFS=$OIFS
 989                 exit 1
 990         fi
 991         }
 992 }
 993
 994 set_name_rev () {
 995         revname=$( (
 996                 clear_local_git_env
 997                 cd "$1" && {
 998                         git describe "$2" 2>/dev/null ||
 999                         git describe --tags "$2" 2>/dev/null ||
1000                         git describe --contains "$2" 2>/dev/null ||
1001                         git describe --all --always "$2"
1002                 }
1003         ) )
1004         test -z "$revname" || revname=" ($revname)"
1005 }
1006 #
1007 # Show commit summary for submodules in index or working tree
1008 #
1009 # If '--cached' is given, show summary between index and given commit,
1010 # or between working tree and given commit
1011 #
1012 # $@ = [commit (default 'HEAD'),] requested paths (default all)
1013 #
1014 cmd_summary() {
1015         summary_limit=-1
1016         for_status=
1017         diff_cmd=diff-index
1018
1019         # parse $args after "submodule ... summary".
1020         while test $# -ne 0
1021         do
1022                 case "$1" in
1023                 --cached)
1024                         cached="$1"
1025                         ;;
1026                 --files)
1027                         files="$1"
1028                         ;;
1029                 --for-status)
1030                         for_status="$1"
1031                         ;;
1032                 -n|--summary-limit)
1033                         summary_limit="$2"
1034                         isnumber "$summary_limit" || usage
1035                         shift
1036                         ;;
1037                 --summary-limit=*)
1038                         summary_limit="${1#--summary-limit=}"
1039                         isnumber "$summary_limit" || usage
1040                         ;;
1041                 --)
1042                         shift
1043                         break
1044                         ;;
1045                 -*)
1046                         usage
1047                         ;;
1048                 *)
1049                         break
1050                         ;;
1051                 esac
1052                 shift
1053         done
1054
1055         test $summary_limit = 0 && return
1056
1057         if rev=$(git rev-parse -q --verify --default HEAD ${1+"$1"})
1058         then
1059                 head=$rev
1060                 test $# = 0 || shift
1061         elif test -z "$1" -o "$1" = "HEAD"
1062         then
1063                 # before the first commit: compare with an empty tree
1064                 head=$(git hash-object -w -t tree --stdin </dev/null)
1065                 test -z "$1" || shift
1066         else
1067                 head="HEAD"
1068         fi
1069
1070         if [ -n "$files" ]
1071         then
1072                 test -n "$cached" &&
1073                 die "$(gettext "The --cached option cannot be used with the --files option")"
1074                 diff_cmd=diff-files
1075                 head=
1076         fi
1077
1078         cd_to_toplevel
1079         eval "set $(git rev-parse --sq --prefix "$wt_prefix" -- "$@")"
1080         # Get modified modules cared by user
1081         modules=$(git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- "$@" |
1082                 sane_egrep '^:([0-7]* )?160000' |
1083                 while read mod_src mod_dst sha1_src sha1_dst status sm_path
1084                 do
1085                         # Always show modules deleted or type-changed (blob<->module)
1086                         test $status = D -o $status = T && echo "$sm_path" && continue
1087                         # Respect the ignore setting for --for-status.
1088                         if test -n "$for_status"
1089                         then
1090                                 name=$(module_name "$sm_path")
1091                                 ignore_config=$(get_submodule_config "$name" ignore none)
1092                                 test $status != A -a $ignore_config = all && continue
1093                         fi
1094                         # Also show added or modified modules which are checked out
1095                         GIT_DIR="$sm_path/.git" git-rev-parse --git-dir >/dev/null 2>&1 &&
1096                         echo "$sm_path"
1097                 done
1098         )
1099
1100         test -z "$modules" && return
1101
1102         git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- $modules |
1103         sane_egrep '^:([0-7]* )?160000' |
1104         cut -c2- |
1105         while read mod_src mod_dst sha1_src sha1_dst status name
1106         do
1107                 if test -z "$cached" &&
1108                         test $sha1_dst = 0000000000000000000000000000000000000000
1109                 then
1110                         case "$mod_dst" in
1111                         160000)
1112                                 sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
1113                                 ;;
1114                         100644 | 100755 | 120000)
1115                                 sha1_dst=$(git hash-object $name)
1116                                 ;;
1117                         000000)
1118                                 ;; # removed
1119                         *)
1120                                 # unexpected type
1121                                 eval_gettextln "unexpected mode \$mod_dst" >&2
1122                                 continue ;;
1123                         esac
1124                 fi
1125                 missing_src=
1126                 missing_dst=
1127
1128                 test $mod_src = 160000 &&
1129                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_src^0 >/dev/null &&
1130                 missing_src=t
1131
1132                 test $mod_dst = 160000 &&
1133                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_dst^0 >/dev/null &&
1134                 missing_dst=t
1135
1136                 display_name=$(relative_path "$name")
1137
1138                 total_commits=
1139                 case "$missing_src,$missing_dst" in
1140                 t,)
1141                         errmsg="$(eval_gettext "  Warn: \$display_name doesn't contain commit \$sha1_src")"
1142                         ;;
1143                 ,t)
1144                         errmsg="$(eval_gettext "  Warn: \$display_name doesn't contain commit \$sha1_dst")"
1145                         ;;
1146                 t,t)
1147                         errmsg="$(eval_gettext "  Warn: \$display_name doesn't contain commits \$sha1_src and \$sha1_dst")"
1148                         ;;
1149                 *)
1150                         errmsg=
1151                         total_commits=$(
1152                         if test $mod_src = 160000 -a $mod_dst = 160000
1153                         then
1154                                 range="$sha1_src...$sha1_dst"
1155                         elif test $mod_src = 160000
1156                         then
1157                                 range=$sha1_src
1158                         else
1159                                 range=$sha1_dst
1160                         fi
1161                         GIT_DIR="$name/.git" \
1162                         git rev-list --first-parent $range -- | wc -l
1163                         )
1164                         total_commits=" ($(($total_commits + 0)))"
1165                         ;;
1166                 esac
1167
1168                 sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
1169                 sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
1170                 if test $status = T
1171                 then
1172                         blob="$(gettext "blob")"
1173                         submodule="$(gettext "submodule")"
1174                         if test $mod_dst = 160000
1175                         then
1176                                 echo "* $display_name $sha1_abbr_src($blob)->$sha1_abbr_dst($submodule)$total_commits:"
1177                         else
1178                                 echo "* $display_name $sha1_abbr_src($submodule)->$sha1_abbr_dst($blob)$total_commits:"
1179                         fi
1180                 else
1181                         echo "* $display_name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
1182                 fi
1183                 if test -n "$errmsg"
1184                 then
1185                         # Don't give error msg for modification whose dst is not submodule
1186                         # i.e. deleted or changed to blob
1187                         test $mod_dst = 160000 && echo "$errmsg"
1188                 else
1189                         if test $mod_src = 160000 -a $mod_dst = 160000
1190                         then
1191                                 limit=
1192                                 test $summary_limit -gt 0 && limit="-$summary_limit"
1193                                 GIT_DIR="$name/.git" \
1194                                 git log $limit --pretty='format:  %m %s' \
1195                                 --first-parent $sha1_src...$sha1_dst
1196                         elif test $mod_dst = 160000
1197                         then
1198                                 GIT_DIR="$name/.git" \
1199                                 git log --pretty='format:  > %s' -1 $sha1_dst
1200                         else
1201                                 GIT_DIR="$name/.git" \
1202                                 git log --pretty='format:  < %s' -1 $sha1_src
1203                         fi
1204                         echo
1205                 fi
1206                 echo
1207         done
1208 }
1209 #
1210 # List all submodules, prefixed with:
1211 #  - submodule not initialized
1212 #  + different revision checked out
1213 #
1214 # If --cached was specified the revision in the index will be printed
1215 # instead of the currently checked out revision.
1216 #
1217 # $@ = requested paths (default to all)
1218 #
1219 cmd_status()
1220 {
1221         # parse $args after "submodule ... status".
1222         while test $# -ne 0
1223         do
1224                 case "$1" in
1225                 -q|--quiet)
1226                         GIT_QUIET=1
1227                         ;;
1228                 --cached)
1229                         cached=1
1230                         ;;
1231                 --recursive)
1232                         recursive=1
1233                         ;;
1234                 --)
1235                         shift
1236                         break
1237                         ;;
1238                 -*)
1239                         usage
1240                         ;;
1241                 *)
1242                         break
1243                         ;;
1244                 esac
1245                 shift
1246         done
1247
1248         module_list "$@" |
1249         while read mode sha1 stage sm_path
1250         do
1251                 die_if_unmatched "$mode"
1252                 name=$(module_name "$sm_path") || exit
1253                 url=$(git config submodule."$name".url)
1254                 displaypath=$(relative_path "$prefix$sm_path")
1255                 if test "$stage" = U
1256                 then
1257                         say "U$sha1 $displaypath"
1258                         continue
1259                 fi
1260                 if test -z "$url" || ! test -d "$sm_path"/.git -o -f "$sm_path"/.git
1261                 then
1262                         say "-$sha1 $displaypath"
1263                         continue;
1264                 fi
1265                 if git diff-files --ignore-submodules=dirty --quiet -- "$sm_path"
1266                 then
1267                         set_name_rev "$sm_path" "$sha1"
1268                         say " $sha1 $displaypath$revname"
1269                 else
1270                         if test -z "$cached"
1271                         then
1272                                 sha1=$(clear_local_git_env; cd "$sm_path" && git rev-parse --verify HEAD)
1273                         fi
1274                         set_name_rev "$sm_path" "$sha1"
1275                         say "+$sha1 $displaypath$revname"
1276                 fi
1277
1278                 if test -n "$recursive"
1279                 then
1280                         (
1281                                 prefix="$displaypath/"
1282                                 clear_local_git_env
1283                                 cd "$sm_path" &&
1284                                 eval cmd_status
1285                         ) ||
1286                         die "$(eval_gettext "Failed to recurse into submodule path '\$sm_path'")"
1287                 fi
1288         done
1289 }
1290 #
1291 # Sync remote urls for submodules
1292 # This makes the value for remote.$remote.url match the value
1293 # specified in .gitmodules.
1294 #
1295 cmd_sync()
1296 {
1297         while test $# -ne 0
1298         do
1299                 case "$1" in
1300                 -q|--quiet)
1301                         GIT_QUIET=1
1302                         shift
1303                         ;;
1304                 --recursive)
1305                         recursive=1
1306                         shift
1307                         ;;
1308                 --)
1309                         shift
1310                         break
1311                         ;;
1312                 -*)
1313                         usage
1314                         ;;
1315                 *)
1316                         break
1317                         ;;
1318                 esac
1319         done
1320         cd_to_toplevel
1321         module_list "$@" |
1322         while read mode sha1 stage sm_path
1323         do
1324                 die_if_unmatched "$mode"
1325                 name=$(module_name "$sm_path")
1326                 url=$(git config -f .gitmodules --get submodule."$name".url)
1327
1328                 # Possibly a url relative to parent
1329                 case "$url" in
1330                 ./*|../*)
1331                         # rewrite foo/bar as ../.. to find path from
1332                         # submodule work tree to superproject work tree
1333                         up_path="$(echo "$sm_path" | sed "s/[^/][^/]*/../g")" &&
1334                         # guarantee a trailing /
1335                         up_path=${up_path%/}/ &&
1336                         # path from submodule work tree to submodule origin repo
1337                         sub_origin_url=$(resolve_relative_url "$url" "$up_path") &&
1338                         # path from superproject work tree to submodule origin repo
1339                         super_config_url=$(resolve_relative_url "$url") || exit
1340                         ;;
1341                 *)
1342                         sub_origin_url="$url"
1343                         super_config_url="$url"
1344                         ;;
1345                 esac
1346
1347                 if git config "submodule.$name.url" >/dev/null 2>/dev/null
1348                 then
1349                         displaypath=$(relative_path "$prefix$sm_path")
1350                         say "$(eval_gettext "Synchronizing submodule url for '\$displaypath'")"
1351                         git config submodule."$name".url "$super_config_url"
1352
1353                         if test -e "$sm_path"/.git
1354                         then
1355                         (
1356                                 clear_local_git_env
1357                                 cd "$sm_path"
1358                                 remote=$(get_default_remote)
1359                                 git config remote."$remote".url "$sub_origin_url"
1360
1361                                 if test -n "$recursive"
1362                                 then
1363                                         prefix="$prefix$sm_path/"
1364                                         eval cmd_sync
1365                                 fi
1366                         )
1367                         fi
1368                 fi
1369         done
1370 }
1371
1372 # This loop parses the command line arguments to find the
1373 # subcommand name to dispatch.  Parsing of the subcommand specific
1374 # options are primarily done by the subcommand implementations.
1375 # Subcommand specific options such as --branch and --cached are
1376 # parsed here as well, for backward compatibility.
1377
1378 while test $# != 0 && test -z "$command"
1379 do
1380         case "$1" in
1381         add | foreach | init | deinit | update | status | summary | sync)
1382                 command=$1
1383                 ;;
1384         -q|--quiet)
1385                 GIT_QUIET=1
1386                 ;;
1387         -b|--branch)
1388                 case "$2" in
1389                 '')
1390                         usage
1391                         ;;
1392                 esac
1393                 branch="$2"; shift
1394                 ;;
1395         --cached)
1396                 cached="$1"
1397                 ;;
1398         --)
1399                 break
1400                 ;;
1401         -*)
1402                 usage
1403                 ;;
1404         *)
1405                 break
1406                 ;;
1407         esac
1408         shift
1409 done
1410
1411 # No command word defaults to "status"
1412 if test -z "$command"
1413 then
1414     if test $# = 0
1415     then
1416         command=status
1417     else
1418         usage
1419     fi
1420 fi
1421
1422 # "-b branch" is accepted only by "add"
1423 if test -n "$branch" && test "$command" != add
1424 then
1425         usage
1426 fi
1427
1428 # "--cached" is accepted only by "status" and "summary"
1429 if test -n "$cached" && test "$command" != status -a "$command" != summary
1430 then
1431         usage
1432 fi
1433
1434 "cmd_$command" "$@"