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