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] [--cached]
   9    or: $dashless [--quiet] add [-b <branch>] [-f|--force] [--name <name>] [--reference <repository>] [--] <repository> [<path>]
  10    or: $dashless [--quiet] status [--cached] [--recursive] [--] [<path>...]
  11    or: $dashless [--quiet] init [--] [<path>...]
  12    or: $dashless [--quiet] deinit [-f|--force] (--all| [--] <path>...)
  13    or: $dashless [--quiet] update [--init] [--remote] [-N|--no-fetch] [-f|--force] [--checkout|--merge|--rebase] [--[no-]recommend-shallow] [--reference <repository>] [--recursive] [--] [<path>...]
  14    or: $dashless [--quiet] set-branch (--default|--branch <branch>) [--] <path>
  15    or: $dashless [--quiet] summary [--cached|--files] [--summary-limit <n>] [commit] [--] [<path>...]
  16    or: $dashless [--quiet] foreach [--recursive] <command>
  17    or: $dashless [--quiet] sync [--recursive] [--] [<path>...]
  18    or: $dashless [--quiet] absorbgitdirs [--] [<path>...]"
  19 OPTIONS_SPEC=
  20 SUBDIRECTORY_OK=Yes
  21 . git-sh-setup
  22 . git-parse-remote
  23 require_work_tree
  24 wt_prefix=$(git rev-parse --show-prefix)
  25 cd_to_toplevel
  26
  27 # Tell the rest of git that any URLs we get don't come
  28 # directly from the user, so it can apply policy as appropriate.
  29 GIT_PROTOCOL_FROM_USER=0
  30 export GIT_PROTOCOL_FROM_USER
  31
  32 command=
  33 branch=
  34 force=
  35 reference=
  36 cached=
  37 recursive=
  38 init=
  39 files=
  40 remote=
  41 nofetch=
  42 update=
  43 prefix=
  44 custom_name=
  45 depth=
  46 progress=
  47 dissociate=
  48
  49 die_if_unmatched ()
  50 {
  51         if test "$1" = "#unmatched"
  52         then
  53                 exit ${2:-1}
  54         fi
  55 }
  56
  57 #
  58 # Print a submodule configuration setting
  59 #
  60 # $1 = submodule name
  61 # $2 = option name
  62 # $3 = default value
  63 #
  64 # Checks in the usual git-config places first (for overrides),
  65 # otherwise it falls back on .gitmodules.  This allows you to
  66 # distribute project-wide defaults in .gitmodules, while still
  67 # customizing individual repositories if necessary.  If the option is
  68 # not in .gitmodules either, print a default value.
  69 #
  70 get_submodule_config () {
  71         name="$1"
  72         option="$2"
  73         default="$3"
  74         value=$(git config submodule."$name"."$option")
  75         if test -z "$value"
  76         then
  77                 value=$(git submodule--helper config submodule."$name"."$option")
  78         fi
  79         printf '%s' "${value:-$default}"
  80 }
  81
  82 isnumber()
  83 {
  84         n=$(($1 + 0)) 2>/dev/null && test "$n" = "$1"
  85 }
  86
  87 # Given a full hex object ID, is this the zero OID?
  88 is_zero_oid () {
  89         echo "$1" | sane_egrep '^0+$' >/dev/null 2>&1
  90 }
  91
  92 # Sanitize the local git environment for use within a submodule. We
  93 # can't simply use clear_local_git_env since we want to preserve some
  94 # of the settings from GIT_CONFIG_PARAMETERS.
  95 sanitize_submodule_env()
  96 {
  97         save_config=$GIT_CONFIG_PARAMETERS
  98         clear_local_git_env
  99         GIT_CONFIG_PARAMETERS=$save_config
 100         export GIT_CONFIG_PARAMETERS
 101 }
 102
 103 #
 104 # Add a new submodule to the working tree, .gitmodules and the index
 105 #
 106 # $@ = repo path
 107 #
 108 # optional branch is stored in global branch variable
 109 #
 110 cmd_add()
 111 {
 112         # parse $args after "submodule ... add".
 113         reference_path=
 114         while test $# -ne 0
 115         do
 116                 case "$1" in
 117                 -b | --branch)
 118                         case "$2" in '') usage ;; esac
 119                         branch=$2
 120                         shift
 121                         ;;
 122                 -f | --force)
 123                         force=$1
 124                         ;;
 125                 -q|--quiet)
 126                         GIT_QUIET=1
 127                         ;;
 128                 --progress)
 129                         progress=1
 130                         ;;
 131                 --reference)
 132                         case "$2" in '') usage ;; esac
 133                         reference_path=$2
 134                         shift
 135                         ;;
 136                 --reference=*)
 137                         reference_path="${1#--reference=}"
 138                         ;;
 139                 --dissociate)
 140                         dissociate=1
 141                         ;;
 142                 --name)
 143                         case "$2" in '') usage ;; esac
 144                         custom_name=$2
 145                         shift
 146                         ;;
 147                 --depth)
 148                         case "$2" in '') usage ;; esac
 149                         depth="--depth=$2"
 150                         shift
 151                         ;;
 152                 --depth=*)
 153                         depth=$1
 154                         ;;
 155                 --)
 156                         shift
 157                         break
 158                         ;;
 159                 -*)
 160                         usage
 161                         ;;
 162                 *)
 163                         break
 164                         ;;
 165                 esac
 166                 shift
 167         done
 168
 169         if ! git submodule--helper config --check-writeable >/dev/null 2>&1
 170         then
 171                  die "$(eval_gettext "please make sure that the .gitmodules file is in the working tree")"
 172         fi
 173
 174         if test -n "$reference_path"
 175         then
 176                 is_absolute_path "$reference_path" ||
 177                 reference_path="$wt_prefix$reference_path"
 178
 179                 reference="--reference=$reference_path"
 180         fi
 181
 182         repo=$1
 183         sm_path=$2
 184
 185         if test -z "$sm_path"; then
 186                 sm_path=$(printf '%s\n' "$repo" |
 187                         sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
 188         fi
 189
 190         if test -z "$repo" || test -z "$sm_path"; then
 191                 usage
 192         fi
 193
 194         is_absolute_path "$sm_path" || sm_path="$wt_prefix$sm_path"
 195
 196         # assure repo is absolute or relative to parent
 197         case "$repo" in
 198         ./*|../*)
 199                 test -z "$wt_prefix" ||
 200                 die "$(gettext "Relative path can only be used from the toplevel of the working tree")"
 201
 202                 # dereference source url relative to parent's url
 203                 realrepo=$(git submodule--helper resolve-relative-url "$repo") || exit
 204                 ;;
 205         *:*|/*)
 206                 # absolute url
 207                 realrepo=$repo
 208                 ;;
 209         *)
 210                 die "$(eval_gettext "repo URL: '\$repo' must be absolute or begin with ./|../")"
 211         ;;
 212         esac
 213
 214         # normalize path:
 215         # multiple //; leading ./; /./; /../; trailing /
 216         sm_path=$(printf '%s/\n' "$sm_path" |
 217                 sed -e '
 218                         s|//*|/|g
 219                         s|^\(\./\)*||
 220                         s|/\(\./\)*|/|g
 221                         :start
 222                         s|\([^/]*\)/\.\./||
 223                         tstart
 224                         s|/*$||
 225                 ')
 226         if test -z "$force"
 227         then
 228                 git ls-files --error-unmatch "$sm_path" > /dev/null 2>&1 &&
 229                 die "$(eval_gettext "'\$sm_path' already exists in the index")"
 230         else
 231                 git ls-files -s "$sm_path" | sane_grep -v "^160000" > /dev/null 2>&1 &&
 232                 die "$(eval_gettext "'\$sm_path' already exists in the index and is not a submodule")"
 233         fi
 234
 235         if test -z "$force" &&
 236                 ! git add --dry-run --ignore-missing --no-warn-embedded-repo "$sm_path" > /dev/null 2>&1
 237         then
 238                 eval_gettextln "The following path is ignored by one of your .gitignore files:
 239 \$sm_path
 240 Use -f if you really want to add it." >&2
 241                 exit 1
 242         fi
 243
 244         if test -n "$custom_name"
 245         then
 246                 sm_name="$custom_name"
 247         else
 248                 sm_name="$sm_path"
 249         fi
 250
 251         if ! git submodule--helper check-name "$sm_name"
 252         then
 253                 die "$(eval_gettext "'$sm_name' is not a valid submodule name")"
 254         fi
 255
 256         # perhaps the path exists and is already a git repo, else clone it
 257         if test -e "$sm_path"
 258         then
 259                 if test -d "$sm_path"/.git || test -f "$sm_path"/.git
 260                 then
 261                         eval_gettextln "Adding existing repo at '\$sm_path' to the index"
 262                 else
 263                         die "$(eval_gettext "'\$sm_path' already exists and is not a valid git repo")"
 264                 fi
 265
 266         else
 267                 if test -d ".git/modules/$sm_name"
 268                 then
 269                         if test -z "$force"
 270                         then
 271                                 eval_gettextln >&2 "A git directory for '\$sm_name' is found locally with remote(s):"
 272                                 GIT_DIR=".git/modules/$sm_name" GIT_WORK_TREE=. git remote -v | grep '(fetch)' | sed -e s,^,"  ", -e s,' (fetch)',, >&2
 273                                 die "$(eval_gettextln "\
 274 If you want to reuse this local git directory instead of cloning again from
 275   \$realrepo
 276 use the '--force' option. If the local git directory is not the correct repo
 277 or you are unsure what this means choose another name with the '--name' option.")"
 278                         else
 279                                 eval_gettextln "Reactivating local git directory for submodule '\$sm_name'."
 280                         fi
 281                 fi
 282                 git submodule--helper clone ${GIT_QUIET:+--quiet} ${progress:+"--progress"} --prefix "$wt_prefix" --path "$sm_path" --name "$sm_name" --url "$realrepo" ${reference:+"$reference"} ${dissociate:+"--dissociate"} ${depth:+"$depth"} || exit
 283                 (
 284                         sanitize_submodule_env
 285                         cd "$sm_path" &&
 286                         # ash fails to wordsplit ${branch:+-b "$branch"...}
 287                         case "$branch" in
 288                         '') git checkout -f -q ;;
 289                         ?*) git checkout -f -q -B "$branch" "origin/$branch" ;;
 290                         esac
 291                 ) || die "$(eval_gettext "Unable to checkout submodule '\$sm_path'")"
 292         fi
 293         git config submodule."$sm_name".url "$realrepo"
 294
 295         git add --no-warn-embedded-repo $force "$sm_path" ||
 296         die "$(eval_gettext "Failed to add submodule '\$sm_path'")"
 297
 298         git submodule--helper config submodule."$sm_name".path "$sm_path" &&
 299         git submodule--helper config submodule."$sm_name".url "$repo" &&
 300         if test -n "$branch"
 301         then
 302                 git submodule--helper config submodule."$sm_name".branch "$branch"
 303         fi &&
 304         git add --force .gitmodules ||
 305         die "$(eval_gettext "Failed to register submodule '\$sm_path'")"
 306
 307         # NEEDSWORK: In a multi-working-tree world, this needs to be
 308         # set in the per-worktree config.
 309         if git config --get submodule.active >/dev/null
 310         then
 311                 # If the submodule being adding isn't already covered by the
 312                 # current configured pathspec, set the submodule's active flag
 313                 if ! git submodule--helper is-active "$sm_path"
 314                 then
 315                         git config submodule."$sm_name".active "true"
 316                 fi
 317         else
 318                 git config submodule."$sm_name".active "true"
 319         fi
 320 }
 321
 322 #
 323 # Execute an arbitrary command sequence in each checked out
 324 # submodule
 325 #
 326 # $@ = command to execute
 327 #
 328 cmd_foreach()
 329 {
 330         # parse $args after "submodule ... foreach".
 331         while test $# -ne 0
 332         do
 333                 case "$1" in
 334                 -q|--quiet)
 335                         GIT_QUIET=1
 336                         ;;
 337                 --recursive)
 338                         recursive=1
 339                         ;;
 340                 -*)
 341                         usage
 342                         ;;
 343                 *)
 344                         break
 345                         ;;
 346                 esac
 347                 shift
 348         done
 349
 350         git ${wt_prefix:+-C "$wt_prefix"} ${prefix:+--super-prefix "$prefix"} submodule--helper foreach ${GIT_QUIET:+--quiet} ${recursive:+--recursive} -- "$@"
 351 }
 352
 353 #
 354 # Register submodules in .git/config
 355 #
 356 # $@ = requested paths (default to all)
 357 #
 358 cmd_init()
 359 {
 360         # parse $args after "submodule ... init".
 361         while test $# -ne 0
 362         do
 363                 case "$1" in
 364                 -q|--quiet)
 365                         GIT_QUIET=1
 366                         ;;
 367                 --)
 368                         shift
 369                         break
 370                         ;;
 371                 -*)
 372                         usage
 373                         ;;
 374                 *)
 375                         break
 376                         ;;
 377                 esac
 378                 shift
 379         done
 380
 381         git ${wt_prefix:+-C "$wt_prefix"} ${prefix:+--super-prefix "$prefix"} submodule--helper init ${GIT_QUIET:+--quiet} -- "$@"
 382 }
 383
 384 #
 385 # Unregister submodules from .git/config and remove their work tree
 386 #
 387 cmd_deinit()
 388 {
 389         # parse $args after "submodule ... deinit".
 390         deinit_all=
 391         while test $# -ne 0
 392         do
 393                 case "$1" in
 394                 -f|--force)
 395                         force=$1
 396                         ;;
 397                 -q|--quiet)
 398                         GIT_QUIET=1
 399                         ;;
 400                 --all)
 401                         deinit_all=t
 402                         ;;
 403                 --)
 404                         shift
 405                         break
 406                         ;;
 407                 -*)
 408                         usage
 409                         ;;
 410                 *)
 411                         break
 412                         ;;
 413                 esac
 414                 shift
 415         done
 416
 417         git ${wt_prefix:+-C "$wt_prefix"} submodule--helper deinit ${GIT_QUIET:+--quiet} ${prefix:+--prefix "$prefix"} ${force:+--force} ${deinit_all:+--all} -- "$@"
 418 }
 419
 420 is_tip_reachable () (
 421         sanitize_submodule_env &&
 422         cd "$1" &&
 423         rev=$(git rev-list -n 1 "$2" --not --all 2>/dev/null) &&
 424         test -z "$rev"
 425 )
 426
 427 fetch_in_submodule () (
 428         sanitize_submodule_env &&
 429         cd "$1" &&
 430         case "$2" in
 431         '')
 432                 git fetch ;;
 433         *)
 434                 shift
 435                 git fetch $(get_default_remote) "$@" ;;
 436         esac
 437 )
 438
 439 #
 440 # Update each submodule path to correct revision, using clone and checkout as needed
 441 #
 442 # $@ = requested paths (default to all)
 443 #
 444 cmd_update()
 445 {
 446         # parse $args after "submodule ... update".
 447         while test $# -ne 0
 448         do
 449                 case "$1" in
 450                 -q|--quiet)
 451                         GIT_QUIET=1
 452                         ;;
 453                 -v)
 454                         GIT_QUIET=0
 455                         ;;
 456                 --progress)
 457                         progress=1
 458                         ;;
 459                 -i|--init)
 460                         init=1
 461                         ;;
 462                 --remote)
 463                         remote=1
 464                         ;;
 465                 -N|--no-fetch)
 466                         nofetch=1
 467                         ;;
 468                 -f|--force)
 469                         force=$1
 470                         ;;
 471                 -r|--rebase)
 472                         update="rebase"
 473                         ;;
 474                 --reference)
 475                         case "$2" in '') usage ;; esac
 476                         reference="--reference=$2"
 477                         shift
 478                         ;;
 479                 --reference=*)
 480                         reference="$1"
 481                         ;;
 482                 --dissociate)
 483                         dissociate=1
 484                         ;;
 485                 -m|--merge)
 486                         update="merge"
 487                         ;;
 488                 --recursive)
 489                         recursive=1
 490                         ;;
 491                 --checkout)
 492                         update="checkout"
 493                         ;;
 494                 --recommend-shallow)
 495                         recommend_shallow="--recommend-shallow"
 496                         ;;
 497                 --no-recommend-shallow)
 498                         recommend_shallow="--no-recommend-shallow"
 499                         ;;
 500                 --depth)
 501                         case "$2" in '') usage ;; esac
 502                         depth="--depth=$2"
 503                         shift
 504                         ;;
 505                 --depth=*)
 506                         depth=$1
 507                         ;;
 508                 -j|--jobs)
 509                         case "$2" in '') usage ;; esac
 510                         jobs="--jobs=$2"
 511                         shift
 512                         ;;
 513                 --jobs=*)
 514                         jobs=$1
 515                         ;;
 516                 --)
 517                         shift
 518                         break
 519                         ;;
 520                 -*)
 521                         usage
 522                         ;;
 523                 *)
 524                         break
 525                         ;;
 526                 esac
 527                 shift
 528         done
 529
 530         if test -n "$init"
 531         then
 532                 cmd_init "--" "$@" || return
 533         fi
 534
 535         {
 536         git submodule--helper update-clone ${GIT_QUIET:+--quiet} \
 537                 ${progress:+"--progress"} \
 538                 ${wt_prefix:+--prefix "$wt_prefix"} \
 539                 ${prefix:+--recursive-prefix "$prefix"} \
 540                 ${update:+--update "$update"} \
 541                 ${reference:+"$reference"} \
 542                 ${dissociate:+"--dissociate"} \
 543                 ${depth:+--depth "$depth"} \
 544                 $recommend_shallow \
 545                 $jobs \
 546                 -- \
 547                 "$@" || echo "#unmatched" $?
 548         } | {
 549         err=
 550         while read -r quickabort sha1 just_cloned sm_path
 551         do
 552                 die_if_unmatched "$quickabort" "$sha1"
 553
 554                 git submodule--helper ensure-core-worktree "$sm_path" || exit 1
 555
 556                 update_module=$(git submodule--helper update-module-mode $just_cloned "$sm_path" $update)
 557
 558                 displaypath=$(git submodule--helper relative-path "$prefix$sm_path" "$wt_prefix")
 559
 560                 if test $just_cloned -eq 1
 561                 then
 562                         subsha1=
 563                 else
 564                         subsha1=$(sanitize_submodule_env; cd "$sm_path" &&
 565                                 git rev-parse --verify HEAD) ||
 566                         die "$(eval_gettext "Unable to find current revision in submodule path '\$displaypath'")"
 567                 fi
 568
 569                 if test -n "$remote"
 570                 then
 571                         branch=$(git submodule--helper remote-branch "$sm_path")
 572                         if test -z "$nofetch"
 573                         then
 574                                 # Fetch remote before determining tracking $sha1
 575                                 fetch_in_submodule "$sm_path" $depth ||
 576                                 die "$(eval_gettext "Unable to fetch in submodule path '\$sm_path'")"
 577                         fi
 578                         remote_name=$(sanitize_submodule_env; cd "$sm_path" && get_default_remote)
 579                         sha1=$(sanitize_submodule_env; cd "$sm_path" &&
 580                                 git rev-parse --verify "${remote_name}/${branch}") ||
 581                         die "$(eval_gettext "Unable to find current \${remote_name}/\${branch} revision in submodule path '\$sm_path'")"
 582                 fi
 583
 584                 if test "$subsha1" != "$sha1" || test -n "$force"
 585                 then
 586                         subforce=$force
 587                         # If we don't already have a -f flag and the submodule has never been checked out
 588                         if test -z "$subsha1" && test -z "$force"
 589                         then
 590                                 subforce="-f"
 591                         fi
 592
 593                         if test -z "$nofetch"
 594                         then
 595                                 # Run fetch only if $sha1 isn't present or it
 596                                 # is not reachable from a ref.
 597                                 is_tip_reachable "$sm_path" "$sha1" ||
 598                                 fetch_in_submodule "$sm_path" $depth ||
 599                                 say "$(eval_gettext "Unable to fetch in submodule path '\$displaypath'; trying to directly fetch \$sha1:")"
 600
 601                                 # Now we tried the usual fetch, but $sha1 may
 602                                 # not be reachable from any of the refs
 603                                 is_tip_reachable "$sm_path" "$sha1" ||
 604                                 fetch_in_submodule "$sm_path" $depth "$sha1" ||
 605                                 die "$(eval_gettext "Fetched in submodule path '\$displaypath', but it did not contain \$sha1. Direct fetching of that commit failed.")"
 606                         fi
 607
 608                         must_die_on_failure=
 609                         case "$update_module" in
 610                         checkout)
 611                                 command="git checkout $subforce -q"
 612                                 die_msg="$(eval_gettext "Unable to checkout '\$sha1' in submodule path '\$displaypath'")"
 613                                 say_msg="$(eval_gettext "Submodule path '\$displaypath': checked out '\$sha1'")"
 614                                 ;;
 615                         rebase)
 616                                 command="git rebase"
 617                                 die_msg="$(eval_gettext "Unable to rebase '\$sha1' in submodule path '\$displaypath'")"
 618                                 say_msg="$(eval_gettext "Submodule path '\$displaypath': rebased into '\$sha1'")"
 619                                 must_die_on_failure=yes
 620                                 ;;
 621                         merge)
 622                                 command="git merge"
 623                                 die_msg="$(eval_gettext "Unable to merge '\$sha1' in submodule path '\$displaypath'")"
 624                                 say_msg="$(eval_gettext "Submodule path '\$displaypath': merged in '\$sha1'")"
 625                                 must_die_on_failure=yes
 626                                 ;;
 627                         !*)
 628                                 command="${update_module#!}"
 629                                 die_msg="$(eval_gettext "Execution of '\$command \$sha1' failed in submodule path '\$displaypath'")"
 630                                 say_msg="$(eval_gettext "Submodule path '\$displaypath': '\$command \$sha1'")"
 631                                 must_die_on_failure=yes
 632                                 ;;
 633                         *)
 634                                 die "$(eval_gettext "Invalid update mode '$update_module' for submodule path '$path'")"
 635                         esac
 636
 637                         if (sanitize_submodule_env; cd "$sm_path" && $command "$sha1")
 638                         then
 639                                 say "$say_msg"
 640                         elif test -n "$must_die_on_failure"
 641                         then
 642                                 die_with_status 2 "$die_msg"
 643                         else
 644                                 err="${err};$die_msg"
 645                                 continue
 646                         fi
 647                 fi
 648
 649                 if test -n "$recursive"
 650                 then
 651                         (
 652                                 prefix=$(git submodule--helper relative-path "$prefix$sm_path/" "$wt_prefix")
 653                                 wt_prefix=
 654                                 sanitize_submodule_env
 655                                 cd "$sm_path" &&
 656                                 eval cmd_update
 657                         )
 658                         res=$?
 659                         if test $res -gt 0
 660                         then
 661                                 die_msg="$(eval_gettext "Failed to recurse into submodule path '\$displaypath'")"
 662                                 if test $res -ne 2
 663                                 then
 664                                         err="${err};$die_msg"
 665                                         continue
 666                                 else
 667                                         die_with_status $res "$die_msg"
 668                                 fi
 669                         fi
 670                 fi
 671         done
 672
 673         if test -n "$err"
 674         then
 675                 OIFS=$IFS
 676                 IFS=';'
 677                 for e in $err
 678                 do
 679                         if test -n "$e"
 680                         then
 681                                 echo >&2 "$e"
 682                         fi
 683                 done
 684                 IFS=$OIFS
 685                 exit 1
 686         fi
 687         }
 688 }
 689
 690 #
 691 # Configures a submodule's default branch
 692 #
 693 # $@ = requested path
 694 #
 695 cmd_set_branch() {
 696         unset_branch=false
 697         branch=
 698
 699         while test $# -ne 0
 700         do
 701                 case "$1" in
 702                 -q|--quiet)
 703                         # we don't do anything with this but we need to accept it
 704                         ;;
 705                 -d|--default)
 706                         unset_branch=true
 707                         ;;
 708                 -b|--branch)
 709                         case "$2" in '') usage ;; esac
 710                         branch=$2
 711                         shift
 712                         ;;
 713                 --)
 714                         shift
 715                         break
 716                         ;;
 717                 -*)
 718                         usage
 719                         ;;
 720                 *)
 721                         break
 722                         ;;
 723                 esac
 724                 shift
 725         done
 726
 727         if test $# -ne 1
 728         then
 729                 usage
 730         fi
 731
 732         # we can't use `git submodule--helper name` here because internally, it
 733         # hashes the path so a trailing slash could lead to an unintentional no match
 734         name="$(git submodule--helper list "$1" | cut -f2)"
 735         if test -z "$name"
 736         then
 737                 exit 1
 738         fi
 739
 740         test -n "$branch"; has_branch=$?
 741         test "$unset_branch" = true; has_unset_branch=$?
 742
 743         if test $((!$has_branch != !$has_unset_branch)) -eq 0
 744         then
 745                 usage
 746         fi
 747
 748         if test $has_branch -eq 0
 749         then
 750                 git submodule--helper config submodule."$name".branch "$branch"
 751         else
 752                 git submodule--helper config --unset submodule."$name".branch
 753         fi
 754 }
 755
 756 #
 757 # Show commit summary for submodules in index or working tree
 758 #
 759 # If '--cached' is given, show summary between index and given commit,
 760 # or between working tree and given commit
 761 #
 762 # $@ = [commit (default 'HEAD'),] requested paths (default all)
 763 #
 764 cmd_summary() {
 765         summary_limit=-1
 766         for_status=
 767         diff_cmd=diff-index
 768
 769         # parse $args after "submodule ... summary".
 770         while test $# -ne 0
 771         do
 772                 case "$1" in
 773                 --cached)
 774                         cached="$1"
 775                         ;;
 776                 --files)
 777                         files="$1"
 778                         ;;
 779                 --for-status)
 780                         for_status="$1"
 781                         ;;
 782                 -n|--summary-limit)
 783                         summary_limit="$2"
 784                         isnumber "$summary_limit" || usage
 785                         shift
 786                         ;;
 787                 --summary-limit=*)
 788                         summary_limit="${1#--summary-limit=}"
 789                         isnumber "$summary_limit" || usage
 790                         ;;
 791                 --)
 792                         shift
 793                         break
 794                         ;;
 795                 -*)
 796                         usage
 797                         ;;
 798                 *)
 799                         break
 800                         ;;
 801                 esac
 802                 shift
 803         done
 804
 805         test $summary_limit = 0 && return
 806
 807         if rev=$(git rev-parse -q --verify --default HEAD ${1+"$1"})
 808         then
 809                 head=$rev
 810                 test $# = 0 || shift
 811         elif test -z "$1" || test "$1" = "HEAD"
 812         then
 813                 # before the first commit: compare with an empty tree
 814                 head=$(git hash-object -w -t tree --stdin </dev/null)
 815                 test -z "$1" || shift
 816         else
 817                 head="HEAD"
 818         fi
 819
 820         if [ -n "$files" ]
 821         then
 822                 test -n "$cached" &&
 823                 die "$(gettext "The --cached option cannot be used with the --files option")"
 824                 diff_cmd=diff-files
 825                 head=
 826         fi
 827
 828         cd_to_toplevel
 829         eval "set $(git rev-parse --sq --prefix "$wt_prefix" -- "$@")"
 830         # Get modified modules cared by user
 831         modules=$(git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- "$@" |
 832                 sane_egrep '^:([0-7]* )?160000' |
 833                 while read -r mod_src mod_dst sha1_src sha1_dst status sm_path
 834                 do
 835                         # Always show modules deleted or type-changed (blob<->module)
 836                         if test "$status" = D || test "$status" = T
 837                         then
 838                                 printf '%s\n' "$sm_path"
 839                                 continue
 840                         fi
 841                         # Respect the ignore setting for --for-status.
 842                         if test -n "$for_status"
 843                         then
 844                                 name=$(git submodule--helper name "$sm_path")
 845                                 ignore_config=$(get_submodule_config "$name" ignore none)
 846                                 test $status != A && test $ignore_config = all && continue
 847                         fi
 848                         # Also show added or modified modules which are checked out
 849                         GIT_DIR="$sm_path/.git" git rev-parse --git-dir >/dev/null 2>&1 &&
 850                         printf '%s\n' "$sm_path"
 851                 done
 852         )
 853
 854         test -z "$modules" && return
 855
 856         git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- $modules |
 857         sane_egrep '^:([0-7]* )?160000' |
 858         cut -c2- |
 859         while read -r mod_src mod_dst sha1_src sha1_dst status name
 860         do
 861                 if test -z "$cached" &&
 862                         is_zero_oid $sha1_dst
 863                 then
 864                         case "$mod_dst" in
 865                         160000)
 866                                 sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
 867                                 ;;
 868                         100644 | 100755 | 120000)
 869                                 sha1_dst=$(git hash-object $name)
 870                                 ;;
 871                         000000)
 872                                 ;; # removed
 873                         *)
 874                                 # unexpected type
 875                                 eval_gettextln "unexpected mode \$mod_dst" >&2
 876                                 continue ;;
 877                         esac
 878                 fi
 879                 missing_src=
 880                 missing_dst=
 881
 882                 test $mod_src = 160000 &&
 883                 ! GIT_DIR="$name/.git" git rev-parse -q --verify $sha1_src^0 >/dev/null &&
 884                 missing_src=t
 885
 886                 test $mod_dst = 160000 &&
 887                 ! GIT_DIR="$name/.git" git rev-parse -q --verify $sha1_dst^0 >/dev/null &&
 888                 missing_dst=t
 889
 890                 display_name=$(git submodule--helper relative-path "$name" "$wt_prefix")
 891
 892                 total_commits=
 893                 case "$missing_src,$missing_dst" in
 894                 t,)
 895                         errmsg="$(eval_gettext "  Warn: \$display_name doesn't contain commit \$sha1_src")"
 896                         ;;
 897                 ,t)
 898                         errmsg="$(eval_gettext "  Warn: \$display_name doesn't contain commit \$sha1_dst")"
 899                         ;;
 900                 t,t)
 901                         errmsg="$(eval_gettext "  Warn: \$display_name doesn't contain commits \$sha1_src and \$sha1_dst")"
 902                         ;;
 903                 *)
 904                         errmsg=
 905                         total_commits=$(
 906                         if test $mod_src = 160000 && test $mod_dst = 160000
 907                         then
 908                                 range="$sha1_src...$sha1_dst"
 909                         elif test $mod_src = 160000
 910                         then
 911                                 range=$sha1_src
 912                         else
 913                                 range=$sha1_dst
 914                         fi
 915                         GIT_DIR="$name/.git" \
 916                         git rev-list --first-parent $range -- | wc -l
 917                         )
 918                         total_commits=" ($(($total_commits + 0)))"
 919                         ;;
 920                 esac
 921
 922                 sha1_abbr_src=$(GIT_DIR="$name/.git" git rev-parse --short $sha1_src 2>/dev/null ||
 923                         echo $sha1_src | cut -c1-7)
 924                 sha1_abbr_dst=$(GIT_DIR="$name/.git" git rev-parse --short $sha1_dst 2>/dev/null ||
 925                         echo $sha1_dst | cut -c1-7)
 926
 927                 if test $status = T
 928                 then
 929                         blob="$(gettext "blob")"
 930                         submodule="$(gettext "submodule")"
 931                         if test $mod_dst = 160000
 932                         then
 933                                 echo "* $display_name $sha1_abbr_src($blob)->$sha1_abbr_dst($submodule)$total_commits:"
 934                         else
 935                                 echo "* $display_name $sha1_abbr_src($submodule)->$sha1_abbr_dst($blob)$total_commits:"
 936                         fi
 937                 else
 938                         echo "* $display_name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
 939                 fi
 940                 if test -n "$errmsg"
 941                 then
 942                         # Don't give error msg for modification whose dst is not submodule
 943                         # i.e. deleted or changed to blob
 944                         test $mod_dst = 160000 && echo "$errmsg"
 945                 else
 946                         if test $mod_src = 160000 && test $mod_dst = 160000
 947                         then
 948                                 limit=
 949                                 test $summary_limit -gt 0 && limit="-$summary_limit"
 950                                 GIT_DIR="$name/.git" \
 951                                 git log $limit --pretty='format:  %m %s' \
 952                                 --first-parent $sha1_src...$sha1_dst
 953                         elif test $mod_dst = 160000
 954                         then
 955                                 GIT_DIR="$name/.git" \
 956                                 git log --pretty='format:  > %s' -1 $sha1_dst
 957                         else
 958                                 GIT_DIR="$name/.git" \
 959                                 git log --pretty='format:  < %s' -1 $sha1_src
 960                         fi
 961                         echo
 962                 fi
 963                 echo
 964         done
 965 }
 966 #
 967 # List all submodules, prefixed with:
 968 #  - submodule not initialized
 969 #  + different revision checked out
 970 #
 971 # If --cached was specified the revision in the index will be printed
 972 # instead of the currently checked out revision.
 973 #
 974 # $@ = requested paths (default to all)
 975 #
 976 cmd_status()
 977 {
 978         # parse $args after "submodule ... status".
 979         while test $# -ne 0
 980         do
 981                 case "$1" in
 982                 -q|--quiet)
 983                         GIT_QUIET=1
 984                         ;;
 985                 --cached)
 986                         cached=1
 987                         ;;
 988                 --recursive)
 989                         recursive=1
 990                         ;;
 991                 --)
 992                         shift
 993                         break
 994                         ;;
 995                 -*)
 996                         usage
 997                         ;;
 998                 *)
 999                         break
1000                         ;;
1001                 esac
1002                 shift
1003         done
1004
1005         git ${wt_prefix:+-C "$wt_prefix"} ${prefix:+--super-prefix "$prefix"} submodule--helper status ${GIT_QUIET:+--quiet} ${cached:+--cached} ${recursive:+--recursive} -- "$@"
1006 }
1007 #
1008 # Sync remote urls for submodules
1009 # This makes the value for remote.$remote.url match the value
1010 # specified in .gitmodules.
1011 #
1012 cmd_sync()
1013 {
1014         while test $# -ne 0
1015         do
1016                 case "$1" in
1017                 -q|--quiet)
1018                         GIT_QUIET=1
1019                         shift
1020                         ;;
1021                 --recursive)
1022                         recursive=1
1023                         shift
1024                         ;;
1025                 --)
1026                         shift
1027                         break
1028                         ;;
1029                 -*)
1030                         usage
1031                         ;;
1032                 *)
1033                         break
1034                         ;;
1035                 esac
1036         done
1037
1038         git ${wt_prefix:+-C "$wt_prefix"} ${prefix:+--super-prefix "$prefix"} submodule--helper sync ${GIT_QUIET:+--quiet} ${recursive:+--recursive} -- "$@"
1039 }
1040
1041 cmd_absorbgitdirs()
1042 {
1043         git submodule--helper absorb-git-dirs --prefix "$wt_prefix" "$@"
1044 }
1045
1046 # This loop parses the command line arguments to find the
1047 # subcommand name to dispatch.  Parsing of the subcommand specific
1048 # options are primarily done by the subcommand implementations.
1049 # Subcommand specific options such as --branch and --cached are
1050 # parsed here as well, for backward compatibility.
1051
1052 while test $# != 0 && test -z "$command"
1053 do
1054         case "$1" in
1055         add | foreach | init | deinit | update | set-branch | status | summary | sync | absorbgitdirs)
1056                 command=$1
1057                 ;;
1058         -q|--quiet)
1059                 GIT_QUIET=1
1060                 ;;
1061         -b|--branch)
1062                 case "$2" in
1063                 '')
1064                         usage
1065                         ;;
1066                 esac
1067                 branch="$2"; shift
1068                 ;;
1069         --cached)
1070                 cached="$1"
1071                 ;;
1072         --)
1073                 break
1074                 ;;
1075         -*)
1076                 usage
1077                 ;;
1078         *)
1079                 break
1080                 ;;
1081         esac
1082         shift
1083 done
1084
1085 # No command word defaults to "status"
1086 if test -z "$command"
1087 then
1088     if test $# = 0
1089     then
1090         command=status
1091     else
1092         usage
1093     fi
1094 fi
1095
1096 # "-b branch" is accepted only by "add" and "set-branch"
1097 if test -n "$branch" && (test "$command" != add || test "$command" != set-branch)
1098 then
1099         usage
1100 fi
1101
1102 # "--cached" is accepted only by "status" and "summary"
1103 if test -n "$cached" && test "$command" != status && test "$command" != summary
1104 then
1105         usage
1106 fi
1107
1108 "cmd_$(echo $command | sed -e s/-/_/g)" "$@"