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] set-url [--] <path> <newurl>
  16    or: $dashless [--quiet] summary [--cached|--files] [--summary-limit <n>] [commit] [--] [<path>...]
  17    or: $dashless [--quiet] foreach [--recursive] <command>
  18    or: $dashless [--quiet] sync [--recursive] [--] [<path>...]
  19    or: $dashless [--quiet] absorbgitdirs [--] [<path>...]"
  20 OPTIONS_SPEC=
  21 SUBDIRECTORY_OK=Yes
  22 . git-sh-setup
  23 . git-parse-remote
  24 require_work_tree
  25 wt_prefix=$(git rev-parse --show-prefix)
  26 cd_to_toplevel
  27
  28 # Tell the rest of git that any URLs we get don't come
  29 # directly from the user, so it can apply policy as appropriate.
  30 GIT_PROTOCOL_FROM_USER=0
  31 export GIT_PROTOCOL_FROM_USER
  32
  33 command=
  34 branch=
  35 force=
  36 reference=
  37 cached=
  38 recursive=
  39 init=
  40 require_init=
  41 files=
  42 remote=
  43 nofetch=
  44 update=
  45 prefix=
  46 custom_name=
  47 depth=
  48 progress=
  49 dissociate=
  50
  51 die_if_unmatched ()
  52 {
  53         if test "$1" = "#unmatched"
  54         then
  55                 exit ${2:-1}
  56         fi
  57 }
  58
  59 #
  60 # Print a submodule configuration setting
  61 #
  62 # $1 = submodule name
  63 # $2 = option name
  64 # $3 = default value
  65 #
  66 # Checks in the usual git-config places first (for overrides),
  67 # otherwise it falls back on .gitmodules.  This allows you to
  68 # distribute project-wide defaults in .gitmodules, while still
  69 # customizing individual repositories if necessary.  If the option is
  70 # not in .gitmodules either, print a default value.
  71 #
  72 get_submodule_config () {
  73         name="$1"
  74         option="$2"
  75         default="$3"
  76         value=$(git config submodule."$name"."$option")
  77         if test -z "$value"
  78         then
  79                 value=$(git submodule--helper config submodule."$name"."$option")
  80         fi
  81         printf '%s' "${value:-$default}"
  82 }
  83
  84 isnumber()
  85 {
  86         n=$(($1 + 0)) 2>/dev/null && test "$n" = "$1"
  87 }
  88
  89 # Given a full hex object ID, is this the zero OID?
  90 is_zero_oid () {
  91         echo "$1" | sane_egrep '^0+$' >/dev/null 2>&1
  92 }
  93
  94 # Sanitize the local git environment for use within a submodule. We
  95 # can't simply use clear_local_git_env since we want to preserve some
  96 # of the settings from GIT_CONFIG_PARAMETERS.
  97 sanitize_submodule_env()
  98 {
  99         save_config=$GIT_CONFIG_PARAMETERS
 100         clear_local_git_env
 101         GIT_CONFIG_PARAMETERS=$save_config
 102         export GIT_CONFIG_PARAMETERS
 103 }
 104
 105 #
 106 # Add a new submodule to the working tree, .gitmodules and the index
 107 #
 108 # $@ = repo path
 109 #
 110 # optional branch is stored in global branch variable
 111 #
 112 cmd_add()
 113 {
 114         # parse $args after "submodule ... add".
 115         reference_path=
 116         while test $# -ne 0
 117         do
 118                 case "$1" in
 119                 -b | --branch)
 120                         case "$2" in '') usage ;; esac
 121                         branch=$2
 122                         shift
 123                         ;;
 124                 -f | --force)
 125                         force=$1
 126                         ;;
 127                 -q|--quiet)
 128                         GIT_QUIET=1
 129                         ;;
 130                 --progress)
 131                         progress=1
 132                         ;;
 133                 --reference)
 134                         case "$2" in '') usage ;; esac
 135                         reference_path=$2
 136                         shift
 137                         ;;
 138                 --reference=*)
 139                         reference_path="${1#--reference=}"
 140                         ;;
 141                 --dissociate)
 142                         dissociate=1
 143                         ;;
 144                 --name)
 145                         case "$2" in '') usage ;; esac
 146                         custom_name=$2
 147                         shift
 148                         ;;
 149                 --depth)
 150                         case "$2" in '') usage ;; esac
 151                         depth="--depth=$2"
 152                         shift
 153                         ;;
 154                 --depth=*)
 155                         depth=$1
 156                         ;;
 157                 --)
 158                         shift
 159                         break
 160                         ;;
 161                 -*)
 162                         usage
 163                         ;;
 164                 *)
 165                         break
 166                         ;;
 167                 esac
 168                 shift
 169         done
 170
 171         if ! git submodule--helper config --check-writeable >/dev/null 2>&1
 172         then
 173                  die "$(eval_gettext "please make sure that the .gitmodules file is in the working tree")"
 174         fi
 175
 176         if test -n "$reference_path"
 177         then
 178                 is_absolute_path "$reference_path" ||
 179                 reference_path="$wt_prefix$reference_path"
 180
 181                 reference="--reference=$reference_path"
 182         fi
 183
 184         repo=$1
 185         sm_path=$2
 186
 187         if test -z "$sm_path"; then
 188                 sm_path=$(printf '%s\n' "$repo" |
 189                         sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
 190         fi
 191
 192         if test -z "$repo" || test -z "$sm_path"; then
 193                 usage
 194         fi
 195
 196         is_absolute_path "$sm_path" || sm_path="$wt_prefix$sm_path"
 197
 198         # assure repo is absolute or relative to parent
 199         case "$repo" in
 200         ./*|../*)
 201                 test -z "$wt_prefix" ||
 202                 die "$(gettext "Relative path can only be used from the toplevel of the working tree")"
 203
 204                 # dereference source url relative to parent's url
 205                 realrepo=$(git submodule--helper resolve-relative-url "$repo") || exit
 206                 ;;
 207         *:*|/*)
 208                 # absolute url
 209                 realrepo=$repo
 210                 ;;
 211         *)
 212                 die "$(eval_gettext "repo URL: '\$repo' must be absolute or begin with ./|../")"
 213         ;;
 214         esac
 215
 216         # normalize path:
 217         # multiple //; leading ./; /./; /../; trailing /
 218         sm_path=$(printf '%s/\n' "$sm_path" |
 219                 sed -e '
 220                         s|//*|/|g
 221                         s|^\(\./\)*||
 222                         s|/\(\./\)*|/|g
 223                         :start
 224                         s|\([^/]*\)/\.\./||
 225                         tstart
 226                         s|/*$||
 227                 ')
 228         if test -z "$force"
 229         then
 230                 git ls-files --error-unmatch "$sm_path" > /dev/null 2>&1 &&
 231                 die "$(eval_gettext "'\$sm_path' already exists in the index")"
 232         else
 233                 git ls-files -s "$sm_path" | sane_grep -v "^160000" > /dev/null 2>&1 &&
 234                 die "$(eval_gettext "'\$sm_path' already exists in the index and is not a submodule")"
 235         fi
 236
 237         if test -d "$sm_path" &&
 238                 test -z $(git -C "$sm_path" rev-parse --show-cdup 2>/dev/null)
 239         then
 240             git -C "$sm_path" rev-parse --verify -q HEAD >/dev/null ||
 241             die "$(eval_gettext "'\$sm_path' does not have a commit checked out")"
 242         fi
 243
 244         if test -z "$force"
 245         then
 246             dryerr=$(git add --dry-run --ignore-missing --no-warn-embedded-repo "$sm_path" 2>&1 >/dev/null)
 247             res=$?
 248             if test $res -ne 0
 249             then
 250                  echo >&2 "$dryerr"
 251                  exit $res
 252             fi
 253         fi
 254
 255         if test -n "$custom_name"
 256         then
 257                 sm_name="$custom_name"
 258         else
 259                 sm_name="$sm_path"
 260         fi
 261
 262         if ! git submodule--helper check-name "$sm_name"
 263         then
 264                 die "$(eval_gettext "'$sm_name' is not a valid submodule name")"
 265         fi
 266
 267         # perhaps the path exists and is already a git repo, else clone it
 268         if test -e "$sm_path"
 269         then
 270                 if test -d "$sm_path"/.git || test -f "$sm_path"/.git
 271                 then
 272                         eval_gettextln "Adding existing repo at '\$sm_path' to the index"
 273                 else
 274                         die "$(eval_gettext "'\$sm_path' already exists and is not a valid git repo")"
 275                 fi
 276
 277         else
 278                 if test -d ".git/modules/$sm_name"
 279                 then
 280                         if test -z "$force"
 281                         then
 282                                 eval_gettextln >&2 "A git directory for '\$sm_name' is found locally with remote(s):"
 283                                 GIT_DIR=".git/modules/$sm_name" GIT_WORK_TREE=. git remote -v | grep '(fetch)' | sed -e s,^,"  ", -e s,' (fetch)',, >&2
 284                                 die "$(eval_gettextln "\
 285 If you want to reuse this local git directory instead of cloning again from
 286   \$realrepo
 287 use the '--force' option. If the local git directory is not the correct repo
 288 or you are unsure what this means choose another name with the '--name' option.")"
 289                         else
 290                                 eval_gettextln "Reactivating local git directory for submodule '\$sm_name'."
 291                         fi
 292                 fi
 293                 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
 294                 (
 295                         sanitize_submodule_env
 296                         cd "$sm_path" &&
 297                         # ash fails to wordsplit ${branch:+-b "$branch"...}
 298                         case "$branch" in
 299                         '') git checkout -f -q ;;
 300                         ?*) git checkout -f -q -B "$branch" "origin/$branch" ;;
 301                         esac
 302                 ) || die "$(eval_gettext "Unable to checkout submodule '\$sm_path'")"
 303         fi
 304         git config submodule."$sm_name".url "$realrepo"
 305
 306         git add --no-warn-embedded-repo $force "$sm_path" ||
 307         die "$(eval_gettext "Failed to add submodule '\$sm_path'")"
 308
 309         git submodule--helper config submodule."$sm_name".path "$sm_path" &&
 310         git submodule--helper config submodule."$sm_name".url "$repo" &&
 311         if test -n "$branch"
 312         then
 313                 git submodule--helper config submodule."$sm_name".branch "$branch"
 314         fi &&
 315         git add --force .gitmodules ||
 316         die "$(eval_gettext "Failed to register submodule '\$sm_path'")"
 317
 318         # NEEDSWORK: In a multi-working-tree world, this needs to be
 319         # set in the per-worktree config.
 320         if git config --get submodule.active >/dev/null
 321         then
 322                 # If the submodule being adding isn't already covered by the
 323                 # current configured pathspec, set the submodule's active flag
 324                 if ! git submodule--helper is-active "$sm_path"
 325                 then
 326                         git config submodule."$sm_name".active "true"
 327                 fi
 328         else
 329                 git config submodule."$sm_name".active "true"
 330         fi
 331 }
 332
 333 #
 334 # Execute an arbitrary command sequence in each checked out
 335 # submodule
 336 #
 337 # $@ = command to execute
 338 #
 339 cmd_foreach()
 340 {
 341         # parse $args after "submodule ... foreach".
 342         while test $# -ne 0
 343         do
 344                 case "$1" in
 345                 -q|--quiet)
 346                         GIT_QUIET=1
 347                         ;;
 348                 --recursive)
 349                         recursive=1
 350                         ;;
 351                 -*)
 352                         usage
 353                         ;;
 354                 *)
 355                         break
 356                         ;;
 357                 esac
 358                 shift
 359         done
 360
 361         git ${wt_prefix:+-C "$wt_prefix"} ${prefix:+--super-prefix "$prefix"} submodule--helper foreach ${GIT_QUIET:+--quiet} ${recursive:+--recursive} -- "$@"
 362 }
 363
 364 #
 365 # Register submodules in .git/config
 366 #
 367 # $@ = requested paths (default to all)
 368 #
 369 cmd_init()
 370 {
 371         # parse $args after "submodule ... init".
 372         while test $# -ne 0
 373         do
 374                 case "$1" in
 375                 -q|--quiet)
 376                         GIT_QUIET=1
 377                         ;;
 378                 --)
 379                         shift
 380                         break
 381                         ;;
 382                 -*)
 383                         usage
 384                         ;;
 385                 *)
 386                         break
 387                         ;;
 388                 esac
 389                 shift
 390         done
 391
 392         git ${wt_prefix:+-C "$wt_prefix"} ${prefix:+--super-prefix "$prefix"} submodule--helper init ${GIT_QUIET:+--quiet} -- "$@"
 393 }
 394
 395 #
 396 # Unregister submodules from .git/config and remove their work tree
 397 #
 398 cmd_deinit()
 399 {
 400         # parse $args after "submodule ... deinit".
 401         deinit_all=
 402         while test $# -ne 0
 403         do
 404                 case "$1" in
 405                 -f|--force)
 406                         force=$1
 407                         ;;
 408                 -q|--quiet)
 409                         GIT_QUIET=1
 410                         ;;
 411                 --all)
 412                         deinit_all=t
 413                         ;;
 414                 --)
 415                         shift
 416                         break
 417                         ;;
 418                 -*)
 419                         usage
 420                         ;;
 421                 *)
 422                         break
 423                         ;;
 424                 esac
 425                 shift
 426         done
 427
 428         git ${wt_prefix:+-C "$wt_prefix"} submodule--helper deinit ${GIT_QUIET:+--quiet} ${prefix:+--prefix "$prefix"} ${force:+--force} ${deinit_all:+--all} -- "$@"
 429 }
 430
 431 is_tip_reachable () (
 432         sanitize_submodule_env &&
 433         cd "$1" &&
 434         rev=$(git rev-list -n 1 "$2" --not --all 2>/dev/null) &&
 435         test -z "$rev"
 436 )
 437
 438 fetch_in_submodule () (
 439         sanitize_submodule_env &&
 440         cd "$1" &&
 441         case "$2" in
 442         '')
 443                 git fetch ;;
 444         *)
 445                 shift
 446                 git fetch $(get_default_remote) "$@" ;;
 447         esac
 448 )
 449
 450 #
 451 # Update each submodule path to correct revision, using clone and checkout as needed
 452 #
 453 # $@ = requested paths (default to all)
 454 #
 455 cmd_update()
 456 {
 457         # parse $args after "submodule ... update".
 458         while test $# -ne 0
 459         do
 460                 case "$1" in
 461                 -q|--quiet)
 462                         GIT_QUIET=1
 463                         ;;
 464                 -v)
 465                         GIT_QUIET=0
 466                         ;;
 467                 --progress)
 468                         progress=1
 469                         ;;
 470                 -i|--init)
 471                         init=1
 472                         ;;
 473                 --require-init)
 474                         init=1
 475                         require_init=1
 476                         ;;
 477                 --remote)
 478                         remote=1
 479                         ;;
 480                 -N|--no-fetch)
 481                         nofetch=1
 482                         ;;
 483                 -f|--force)
 484                         force=$1
 485                         ;;
 486                 -r|--rebase)
 487                         update="rebase"
 488                         ;;
 489                 --reference)
 490                         case "$2" in '') usage ;; esac
 491                         reference="--reference=$2"
 492                         shift
 493                         ;;
 494                 --reference=*)
 495                         reference="$1"
 496                         ;;
 497                 --dissociate)
 498                         dissociate=1
 499                         ;;
 500                 -m|--merge)
 501                         update="merge"
 502                         ;;
 503                 --recursive)
 504                         recursive=1
 505                         ;;
 506                 --checkout)
 507                         update="checkout"
 508                         ;;
 509                 --recommend-shallow)
 510                         recommend_shallow="--recommend-shallow"
 511                         ;;
 512                 --no-recommend-shallow)
 513                         recommend_shallow="--no-recommend-shallow"
 514                         ;;
 515                 --depth)
 516                         case "$2" in '') usage ;; esac
 517                         depth="--depth=$2"
 518                         shift
 519                         ;;
 520                 --depth=*)
 521                         depth=$1
 522                         ;;
 523                 -j|--jobs)
 524                         case "$2" in '') usage ;; esac
 525                         jobs="--jobs=$2"
 526                         shift
 527                         ;;
 528                 --jobs=*)
 529                         jobs=$1
 530                         ;;
 531                 --)
 532                         shift
 533                         break
 534                         ;;
 535                 -*)
 536                         usage
 537                         ;;
 538                 *)
 539                         break
 540                         ;;
 541                 esac
 542                 shift
 543         done
 544
 545         if test -n "$init"
 546         then
 547                 cmd_init "--" "$@" || return
 548         fi
 549
 550         {
 551         git submodule--helper update-clone ${GIT_QUIET:+--quiet} \
 552                 ${progress:+"--progress"} \
 553                 ${wt_prefix:+--prefix "$wt_prefix"} \
 554                 ${prefix:+--recursive-prefix "$prefix"} \
 555                 ${update:+--update "$update"} \
 556                 ${reference:+"$reference"} \
 557                 ${dissociate:+"--dissociate"} \
 558                 ${depth:+--depth "$depth"} \
 559                 ${require_init:+--require-init} \
 560                 $recommend_shallow \
 561                 $jobs \
 562                 -- \
 563                 "$@" || echo "#unmatched" $?
 564         } | {
 565         err=
 566         while read -r quickabort sha1 just_cloned sm_path
 567         do
 568                 die_if_unmatched "$quickabort" "$sha1"
 569
 570                 git submodule--helper ensure-core-worktree "$sm_path" || exit 1
 571
 572                 update_module=$(git submodule--helper update-module-mode $just_cloned "$sm_path" $update)
 573
 574                 displaypath=$(git submodule--helper relative-path "$prefix$sm_path" "$wt_prefix")
 575
 576                 if test $just_cloned -eq 1
 577                 then
 578                         subsha1=
 579                 else
 580                         subsha1=$(sanitize_submodule_env; cd "$sm_path" &&
 581                                 git rev-parse --verify HEAD) ||
 582                         die "$(eval_gettext "Unable to find current revision in submodule path '\$displaypath'")"
 583                 fi
 584
 585                 if test -n "$remote"
 586                 then
 587                         branch=$(git submodule--helper remote-branch "$sm_path")
 588                         if test -z "$nofetch"
 589                         then
 590                                 # Fetch remote before determining tracking $sha1
 591                                 fetch_in_submodule "$sm_path" $depth ||
 592                                 die "$(eval_gettext "Unable to fetch in submodule path '\$sm_path'")"
 593                         fi
 594                         remote_name=$(sanitize_submodule_env; cd "$sm_path" && get_default_remote)
 595                         sha1=$(sanitize_submodule_env; cd "$sm_path" &&
 596                                 git rev-parse --verify "${remote_name}/${branch}") ||
 597                         die "$(eval_gettext "Unable to find current \${remote_name}/\${branch} revision in submodule path '\$sm_path'")"
 598                 fi
 599
 600                 if test "$subsha1" != "$sha1" || test -n "$force"
 601                 then
 602                         subforce=$force
 603                         # If we don't already have a -f flag and the submodule has never been checked out
 604                         if test -z "$subsha1" && test -z "$force"
 605                         then
 606                                 subforce="-f"
 607                         fi
 608
 609                         if test -z "$nofetch"
 610                         then
 611                                 # Run fetch only if $sha1 isn't present or it
 612                                 # is not reachable from a ref.
 613                                 is_tip_reachable "$sm_path" "$sha1" ||
 614                                 fetch_in_submodule "$sm_path" $depth ||
 615                                 say "$(eval_gettext "Unable to fetch in submodule path '\$displaypath'; trying to directly fetch \$sha1:")"
 616
 617                                 # Now we tried the usual fetch, but $sha1 may
 618                                 # not be reachable from any of the refs
 619                                 is_tip_reachable "$sm_path" "$sha1" ||
 620                                 fetch_in_submodule "$sm_path" $depth "$sha1" ||
 621                                 die "$(eval_gettext "Fetched in submodule path '\$displaypath', but it did not contain \$sha1. Direct fetching of that commit failed.")"
 622                         fi
 623
 624                         must_die_on_failure=
 625                         case "$update_module" in
 626                         checkout)
 627                                 command="git checkout $subforce -q"
 628                                 die_msg="$(eval_gettext "Unable to checkout '\$sha1' in submodule path '\$displaypath'")"
 629                                 say_msg="$(eval_gettext "Submodule path '\$displaypath': checked out '\$sha1'")"
 630                                 ;;
 631                         rebase)
 632                                 command="git rebase"
 633                                 die_msg="$(eval_gettext "Unable to rebase '\$sha1' in submodule path '\$displaypath'")"
 634                                 say_msg="$(eval_gettext "Submodule path '\$displaypath': rebased into '\$sha1'")"
 635                                 must_die_on_failure=yes
 636                                 ;;
 637                         merge)
 638                                 command="git merge"
 639                                 die_msg="$(eval_gettext "Unable to merge '\$sha1' in submodule path '\$displaypath'")"
 640                                 say_msg="$(eval_gettext "Submodule path '\$displaypath': merged in '\$sha1'")"
 641                                 must_die_on_failure=yes
 642                                 ;;
 643                         !*)
 644                                 command="${update_module#!}"
 645                                 die_msg="$(eval_gettext "Execution of '\$command \$sha1' failed in submodule path '\$displaypath'")"
 646                                 say_msg="$(eval_gettext "Submodule path '\$displaypath': '\$command \$sha1'")"
 647                                 must_die_on_failure=yes
 648                                 ;;
 649                         *)
 650                                 die "$(eval_gettext "Invalid update mode '$update_module' for submodule path '$path'")"
 651                         esac
 652
 653                         if (sanitize_submodule_env; cd "$sm_path" && $command "$sha1")
 654                         then
 655                                 say "$say_msg"
 656                         elif test -n "$must_die_on_failure"
 657                         then
 658                                 die_with_status 2 "$die_msg"
 659                         else
 660                                 err="${err};$die_msg"
 661                                 continue
 662                         fi
 663                 fi
 664
 665                 if test -n "$recursive"
 666                 then
 667                         (
 668                                 prefix=$(git submodule--helper relative-path "$prefix$sm_path/" "$wt_prefix")
 669                                 wt_prefix=
 670                                 sanitize_submodule_env
 671                                 cd "$sm_path" &&
 672                                 eval cmd_update
 673                         )
 674                         res=$?
 675                         if test $res -gt 0
 676                         then
 677                                 die_msg="$(eval_gettext "Failed to recurse into submodule path '\$displaypath'")"
 678                                 if test $res -ne 2
 679                                 then
 680                                         err="${err};$die_msg"
 681                                         continue
 682                                 else
 683                                         die_with_status $res "$die_msg"
 684                                 fi
 685                         fi
 686                 fi
 687         done
 688
 689         if test -n "$err"
 690         then
 691                 OIFS=$IFS
 692                 IFS=';'
 693                 for e in $err
 694                 do
 695                         if test -n "$e"
 696                         then
 697                                 echo >&2 "$e"
 698                         fi
 699                 done
 700                 IFS=$OIFS
 701                 exit 1
 702         fi
 703         }
 704 }
 705
 706 #
 707 # Configures a submodule's default branch
 708 #
 709 # $@ = requested path
 710 #
 711 cmd_set_branch() {
 712         unset_branch=false
 713         branch=
 714
 715         while test $# -ne 0
 716         do
 717                 case "$1" in
 718                 -q|--quiet)
 719                         # we don't do anything with this but we need to accept it
 720                         ;;
 721                 -d|--default)
 722                         unset_branch=true
 723                         ;;
 724                 -b|--branch)
 725                         case "$2" in '') usage ;; esac
 726                         branch=$2
 727                         shift
 728                         ;;
 729                 --)
 730                         shift
 731                         break
 732                         ;;
 733                 -*)
 734                         usage
 735                         ;;
 736                 *)
 737                         break
 738                         ;;
 739                 esac
 740                 shift
 741         done
 742
 743         if test $# -ne 1
 744         then
 745                 usage
 746         fi
 747
 748         # we can't use `git submodule--helper name` here because internally, it
 749         # hashes the path so a trailing slash could lead to an unintentional no match
 750         name="$(git submodule--helper list "$1" | cut -f2)"
 751         if test -z "$name"
 752         then
 753                 exit 1
 754         fi
 755
 756         test -n "$branch"; has_branch=$?
 757         test "$unset_branch" = true; has_unset_branch=$?
 758
 759         if test $((!$has_branch != !$has_unset_branch)) -eq 0
 760         then
 761                 usage
 762         fi
 763
 764         if test $has_branch -eq 0
 765         then
 766                 git submodule--helper config submodule."$name".branch "$branch"
 767         else
 768                 git submodule--helper config --unset submodule."$name".branch
 769         fi
 770 }
 771
 772 #
 773 # Configures a submodule's remote url
 774 #
 775 # $@ = requested path, requested url
 776 #
 777 cmd_set_url() {
 778         while test $# -ne 0
 779         do
 780                 case "$1" in
 781                 -q|--quiet)
 782                         GIT_QUIET=1
 783                         ;;
 784                 --)
 785                         shift
 786                         break
 787                         ;;
 788                 -*)
 789                         usage
 790                         ;;
 791                 *)
 792                         break
 793                         ;;
 794                 esac
 795                 shift
 796         done
 797
 798         if test $# -ne 2
 799         then
 800                 usage
 801         fi
 802
 803         # we can't use `git submodule--helper name` here because internally, it
 804         # hashes the path so a trailing slash could lead to an unintentional no match
 805         name="$(git submodule--helper list "$1" | cut -f2)"
 806         if test -z "$name"
 807         then
 808                 exit 1
 809         fi
 810
 811         url="$2"
 812         if test -z "$url"
 813         then
 814                 exit 1
 815         fi
 816
 817         git submodule--helper config submodule."$name".url "$url"
 818         git submodule--helper sync ${GIT_QUIET:+--quiet} "$name"
 819 }
 820
 821 #
 822 # Show commit summary for submodules in index or working tree
 823 #
 824 # If '--cached' is given, show summary between index and given commit,
 825 # or between working tree and given commit
 826 #
 827 # $@ = [commit (default 'HEAD'),] requested paths (default all)
 828 #
 829 cmd_summary() {
 830         summary_limit=-1
 831         for_status=
 832         diff_cmd=diff-index
 833
 834         # parse $args after "submodule ... summary".
 835         while test $# -ne 0
 836         do
 837                 case "$1" in
 838                 --cached)
 839                         cached="$1"
 840                         ;;
 841                 --files)
 842                         files="$1"
 843                         ;;
 844                 --for-status)
 845                         for_status="$1"
 846                         ;;
 847                 -n|--summary-limit)
 848                         summary_limit="$2"
 849                         isnumber "$summary_limit" || usage
 850                         shift
 851                         ;;
 852                 --summary-limit=*)
 853                         summary_limit="${1#--summary-limit=}"
 854                         isnumber "$summary_limit" || usage
 855                         ;;
 856                 --)
 857                         shift
 858                         break
 859                         ;;
 860                 -*)
 861                         usage
 862                         ;;
 863                 *)
 864                         break
 865                         ;;
 866                 esac
 867                 shift
 868         done
 869
 870         test $summary_limit = 0 && return
 871
 872         if rev=$(git rev-parse -q --verify --default HEAD ${1+"$1"})
 873         then
 874                 head=$rev
 875                 test $# = 0 || shift
 876         elif test -z "$1" || test "$1" = "HEAD"
 877         then
 878                 # before the first commit: compare with an empty tree
 879                 head=$(git hash-object -w -t tree --stdin </dev/null)
 880                 test -z "$1" || shift
 881         else
 882                 head="HEAD"
 883         fi
 884
 885         if [ -n "$files" ]
 886         then
 887                 test -n "$cached" &&
 888                 die "$(gettext "The --cached option cannot be used with the --files option")"
 889                 diff_cmd=diff-files
 890                 head=
 891         fi
 892
 893         cd_to_toplevel
 894         eval "set $(git rev-parse --sq --prefix "$wt_prefix" -- "$@")"
 895         # Get modified modules cared by user
 896         modules=$(git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- "$@" |
 897                 sane_egrep '^:([0-7]* )?160000' |
 898                 while read -r mod_src mod_dst sha1_src sha1_dst status sm_path
 899                 do
 900                         # Always show modules deleted or type-changed (blob<->module)
 901                         if test "$status" = D || test "$status" = T
 902                         then
 903                                 printf '%s\n' "$sm_path"
 904                                 continue
 905                         fi
 906                         # Respect the ignore setting for --for-status.
 907                         if test -n "$for_status"
 908                         then
 909                                 name=$(git submodule--helper name "$sm_path")
 910                                 ignore_config=$(get_submodule_config "$name" ignore none)
 911                                 test $status != A && test $ignore_config = all && continue
 912                         fi
 913                         # Also show added or modified modules which are checked out
 914                         GIT_DIR="$sm_path/.git" git rev-parse --git-dir >/dev/null 2>&1 &&
 915                         printf '%s\n' "$sm_path"
 916                 done
 917         )
 918
 919         test -z "$modules" && return
 920
 921         git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- $modules |
 922         sane_egrep '^:([0-7]* )?160000' |
 923         cut -c2- |
 924         while read -r mod_src mod_dst sha1_src sha1_dst status name
 925         do
 926                 if test -z "$cached" &&
 927                         is_zero_oid $sha1_dst
 928                 then
 929                         case "$mod_dst" in
 930                         160000)
 931                                 sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
 932                                 ;;
 933                         100644 | 100755 | 120000)
 934                                 sha1_dst=$(git hash-object $name)
 935                                 ;;
 936                         000000)
 937                                 ;; # removed
 938                         *)
 939                                 # unexpected type
 940                                 eval_gettextln "unexpected mode \$mod_dst" >&2
 941                                 continue ;;
 942                         esac
 943                 fi
 944                 missing_src=
 945                 missing_dst=
 946
 947                 test $mod_src = 160000 &&
 948                 ! GIT_DIR="$name/.git" git rev-parse -q --verify $sha1_src^0 >/dev/null &&
 949                 missing_src=t
 950
 951                 test $mod_dst = 160000 &&
 952                 ! GIT_DIR="$name/.git" git rev-parse -q --verify $sha1_dst^0 >/dev/null &&
 953                 missing_dst=t
 954
 955                 display_name=$(git submodule--helper relative-path "$name" "$wt_prefix")
 956
 957                 total_commits=
 958                 case "$missing_src,$missing_dst" in
 959                 t,)
 960                         errmsg="$(eval_gettext "  Warn: \$display_name doesn't contain commit \$sha1_src")"
 961                         ;;
 962                 ,t)
 963                         errmsg="$(eval_gettext "  Warn: \$display_name doesn't contain commit \$sha1_dst")"
 964                         ;;
 965                 t,t)
 966                         errmsg="$(eval_gettext "  Warn: \$display_name doesn't contain commits \$sha1_src and \$sha1_dst")"
 967                         ;;
 968                 *)
 969                         errmsg=
 970                         total_commits=$(
 971                         if test $mod_src = 160000 && test $mod_dst = 160000
 972                         then
 973                                 range="$sha1_src...$sha1_dst"
 974                         elif test $mod_src = 160000
 975                         then
 976                                 range=$sha1_src
 977                         else
 978                                 range=$sha1_dst
 979                         fi
 980                         GIT_DIR="$name/.git" \
 981                         git rev-list --first-parent $range -- | wc -l
 982                         )
 983                         total_commits=" ($(($total_commits + 0)))"
 984                         ;;
 985                 esac
 986
 987                 sha1_abbr_src=$(GIT_DIR="$name/.git" git rev-parse --short $sha1_src 2>/dev/null ||
 988                         echo $sha1_src | cut -c1-7)
 989                 sha1_abbr_dst=$(GIT_DIR="$name/.git" git rev-parse --short $sha1_dst 2>/dev/null ||
 990                         echo $sha1_dst | cut -c1-7)
 991
 992                 if test $status = T
 993                 then
 994                         blob="$(gettext "blob")"
 995                         submodule="$(gettext "submodule")"
 996                         if test $mod_dst = 160000
 997                         then
 998                                 echo "* $display_name $sha1_abbr_src($blob)->$sha1_abbr_dst($submodule)$total_commits:"
 999                         else
1000                                 echo "* $display_name $sha1_abbr_src($submodule)->$sha1_abbr_dst($blob)$total_commits:"
1001                         fi
1002                 else
1003                         echo "* $display_name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
1004                 fi
1005                 if test -n "$errmsg"
1006                 then
1007                         # Don't give error msg for modification whose dst is not submodule
1008                         # i.e. deleted or changed to blob
1009                         test $mod_dst = 160000 && echo "$errmsg"
1010                 else
1011                         if test $mod_src = 160000 && test $mod_dst = 160000
1012                         then
1013                                 limit=
1014                                 test $summary_limit -gt 0 && limit="-$summary_limit"
1015                                 GIT_DIR="$name/.git" \
1016                                 git log $limit --pretty='format:  %m %s' \
1017                                 --first-parent $sha1_src...$sha1_dst
1018                         elif test $mod_dst = 160000
1019                         then
1020                                 GIT_DIR="$name/.git" \
1021                                 git log --pretty='format:  > %s' -1 $sha1_dst
1022                         else
1023                                 GIT_DIR="$name/.git" \
1024                                 git log --pretty='format:  < %s' -1 $sha1_src
1025                         fi
1026                         echo
1027                 fi
1028                 echo
1029         done
1030 }
1031 #
1032 # List all submodules, prefixed with:
1033 #  - submodule not initialized
1034 #  + different revision checked out
1035 #
1036 # If --cached was specified the revision in the index will be printed
1037 # instead of the currently checked out revision.
1038 #
1039 # $@ = requested paths (default to all)
1040 #
1041 cmd_status()
1042 {
1043         # parse $args after "submodule ... status".
1044         while test $# -ne 0
1045         do
1046                 case "$1" in
1047                 -q|--quiet)
1048                         GIT_QUIET=1
1049                         ;;
1050                 --cached)
1051                         cached=1
1052                         ;;
1053                 --recursive)
1054                         recursive=1
1055                         ;;
1056                 --)
1057                         shift
1058                         break
1059                         ;;
1060                 -*)
1061                         usage
1062                         ;;
1063                 *)
1064                         break
1065                         ;;
1066                 esac
1067                 shift
1068         done
1069
1070         git ${wt_prefix:+-C "$wt_prefix"} ${prefix:+--super-prefix "$prefix"} submodule--helper status ${GIT_QUIET:+--quiet} ${cached:+--cached} ${recursive:+--recursive} -- "$@"
1071 }
1072 #
1073 # Sync remote urls for submodules
1074 # This makes the value for remote.$remote.url match the value
1075 # specified in .gitmodules.
1076 #
1077 cmd_sync()
1078 {
1079         while test $# -ne 0
1080         do
1081                 case "$1" in
1082                 -q|--quiet)
1083                         GIT_QUIET=1
1084                         shift
1085                         ;;
1086                 --recursive)
1087                         recursive=1
1088                         shift
1089                         ;;
1090                 --)
1091                         shift
1092                         break
1093                         ;;
1094                 -*)
1095                         usage
1096                         ;;
1097                 *)
1098                         break
1099                         ;;
1100                 esac
1101         done
1102
1103         git ${wt_prefix:+-C "$wt_prefix"} ${prefix:+--super-prefix "$prefix"} submodule--helper sync ${GIT_QUIET:+--quiet} ${recursive:+--recursive} -- "$@"
1104 }
1105
1106 cmd_absorbgitdirs()
1107 {
1108         git submodule--helper absorb-git-dirs --prefix "$wt_prefix" "$@"
1109 }
1110
1111 # This loop parses the command line arguments to find the
1112 # subcommand name to dispatch.  Parsing of the subcommand specific
1113 # options are primarily done by the subcommand implementations.
1114 # Subcommand specific options such as --branch and --cached are
1115 # parsed here as well, for backward compatibility.
1116
1117 while test $# != 0 && test -z "$command"
1118 do
1119         case "$1" in
1120         add | foreach | init | deinit | update | set-branch | set-url | status | summary | sync | absorbgitdirs)
1121                 command=$1
1122                 ;;
1123         -q|--quiet)
1124                 GIT_QUIET=1
1125                 ;;
1126         -b|--branch)
1127                 case "$2" in
1128                 '')
1129                         usage
1130                         ;;
1131                 esac
1132                 branch="$2"; shift
1133                 ;;
1134         --cached)
1135                 cached="$1"
1136                 ;;
1137         --)
1138                 break
1139                 ;;
1140         -*)
1141                 usage
1142                 ;;
1143         *)
1144                 break
1145                 ;;
1146         esac
1147         shift
1148 done
1149
1150 # No command word defaults to "status"
1151 if test -z "$command"
1152 then
1153     if test $# = 0
1154     then
1155         command=status
1156     else
1157         usage
1158     fi
1159 fi
1160
1161 # "-b branch" is accepted only by "add" and "set-branch"
1162 if test -n "$branch" && (test "$command" != add || test "$command" != set-branch)
1163 then
1164         usage
1165 fi
1166
1167 # "--cached" is accepted only by "status" and "summary"
1168 if test -n "$cached" && test "$command" != status && test "$command" != summary
1169 then
1170         usage
1171 fi
1172
1173 "cmd_$(echo $command | sed -e s/-/_/g)" "$@"