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] (--all| [--] <path>...)
  12    or: $dashless [--quiet] update [--init] [--remote] [-N|--no-fetch] [-f|--force] [--checkout|--merge|--rebase] [--[no-]recommend-shallow] [--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    or: $dashless [--quiet] absorbgitdirs [--] [<path>...]"
  17 OPTIONS_SPEC=
  18 SUBDIRECTORY_OK=Yes
  19 . git-sh-setup
  20 . git-parse-remote
  21 require_work_tree
  22 wt_prefix=$(git rev-parse --show-prefix)
  23 cd_to_toplevel
  24
  25 # Tell the rest of git that any URLs we get don't come
  26 # directly from the user, so it can apply policy as appropriate.
  27 GIT_PROTOCOL_FROM_USER=0
  28 export GIT_PROTOCOL_FROM_USER
  29
  30 command=
  31 branch=
  32 force=
  33 reference=
  34 cached=
  35 recursive=
  36 init=
  37 files=
  38 remote=
  39 nofetch=
  40 update=
  41 prefix=
  42 custom_name=
  43 depth=
  44 progress=
  45 dissociate=
  46
  47 die_if_unmatched ()
  48 {
  49         if test "$1" = "#unmatched"
  50         then
  51                 exit ${2:-1}
  52         fi
  53 }
  54
  55 #
  56 # Print a submodule configuration setting
  57 #
  58 # $1 = submodule name
  59 # $2 = option name
  60 # $3 = default value
  61 #
  62 # Checks in the usual git-config places first (for overrides),
  63 # otherwise it falls back on .gitmodules.  This allows you to
  64 # distribute project-wide defaults in .gitmodules, while still
  65 # customizing individual repositories if necessary.  If the option is
  66 # not in .gitmodules either, print a default value.
  67 #
  68 get_submodule_config () {
  69         name="$1"
  70         option="$2"
  71         default="$3"
  72         value=$(git config submodule."$name"."$option")
  73         if test -z "$value"
  74         then
  75                 value=$(git submodule--helper config submodule."$name"."$option")
  76         fi
  77         printf '%s' "${value:-$default}"
  78 }
  79
  80 isnumber()
  81 {
  82         n=$(($1 + 0)) 2>/dev/null && test "$n" = "$1"
  83 }
  84
  85 # Sanitize the local git environment for use within a submodule. We
  86 # can't simply use clear_local_git_env since we want to preserve some
  87 # of the settings from GIT_CONFIG_PARAMETERS.
  88 sanitize_submodule_env()
  89 {
  90         save_config=$GIT_CONFIG_PARAMETERS
  91         clear_local_git_env
  92         GIT_CONFIG_PARAMETERS=$save_config
  93         export GIT_CONFIG_PARAMETERS
  94 }
  95
  96 #
  97 # Add a new submodule to the working tree, .gitmodules and the index
  98 #
  99 # $@ = repo path
 100 #
 101 # optional branch is stored in global branch variable
 102 #
 103 cmd_add()
 104 {
 105         # parse $args after "submodule ... add".
 106         reference_path=
 107         while test $# -ne 0
 108         do
 109                 case "$1" in
 110                 -b | --branch)
 111                         case "$2" in '') usage ;; esac
 112                         branch=$2
 113                         shift
 114                         ;;
 115                 -f | --force)
 116                         force=$1
 117                         ;;
 118                 -q|--quiet)
 119                         GIT_QUIET=1
 120                         ;;
 121                 --progress)
 122                         progress=1
 123                         ;;
 124                 --reference)
 125                         case "$2" in '') usage ;; esac
 126                         reference_path=$2
 127                         shift
 128                         ;;
 129                 --reference=*)
 130                         reference_path="${1#--reference=}"
 131                         ;;
 132                 --dissociate)
 133                         dissociate=1
 134                         ;;
 135                 --name)
 136                         case "$2" in '') usage ;; esac
 137                         custom_name=$2
 138                         shift
 139                         ;;
 140                 --depth)
 141                         case "$2" in '') usage ;; esac
 142                         depth="--depth=$2"
 143                         shift
 144                         ;;
 145                 --depth=*)
 146                         depth=$1
 147                         ;;
 148                 --)
 149                         shift
 150                         break
 151                         ;;
 152                 -*)
 153                         usage
 154                         ;;
 155                 *)
 156                         break
 157                         ;;
 158                 esac
 159                 shift
 160         done
 161
 162         if ! git submodule--helper config --check-writeable >/dev/null 2>&1
 163         then
 164                  die "$(eval_gettext "please make sure that the .gitmodules file is in the working tree")"
 165         fi
 166
 167         if test -n "$reference_path"
 168         then
 169                 is_absolute_path "$reference_path" ||
 170                 reference_path="$wt_prefix$reference_path"
 171
 172                 reference="--reference=$reference_path"
 173         fi
 174
 175         repo=$1
 176         sm_path=$2
 177
 178         if test -z "$sm_path"; then
 179                 sm_path=$(printf '%s\n' "$repo" |
 180                         sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
 181         fi
 182
 183         if test -z "$repo" || test -z "$sm_path"; then
 184                 usage
 185         fi
 186
 187         is_absolute_path "$sm_path" || sm_path="$wt_prefix$sm_path"
 188
 189         # assure repo is absolute or relative to parent
 190         case "$repo" in
 191         ./*|../*)
 192                 test -z "$wt_prefix" ||
 193                 die "$(gettext "Relative path can only be used from the toplevel of the working tree")"
 194
 195                 # dereference source url relative to parent's url
 196                 realrepo=$(git submodule--helper resolve-relative-url "$repo") || exit
 197                 ;;
 198         *:*|/*)
 199                 # absolute url
 200                 realrepo=$repo
 201                 ;;
 202         *)
 203                 die "$(eval_gettext "repo URL: '\$repo' must be absolute or begin with ./|../")"
 204         ;;
 205         esac
 206
 207         # normalize path:
 208         # multiple //; leading ./; /./; /../; trailing /
 209         sm_path=$(printf '%s/\n' "$sm_path" |
 210                 sed -e '
 211                         s|//*|/|g
 212                         s|^\(\./\)*||
 213                         s|/\(\./\)*|/|g
 214                         :start
 215                         s|\([^/]*\)/\.\./||
 216                         tstart
 217                         s|/*$||
 218                 ')
 219         if test -z "$force"
 220         then
 221                 git ls-files --error-unmatch "$sm_path" > /dev/null 2>&1 &&
 222                 die "$(eval_gettext "'\$sm_path' already exists in the index")"
 223         else
 224                 git ls-files -s "$sm_path" | sane_grep -v "^160000" > /dev/null 2>&1 &&
 225                 die "$(eval_gettext "'\$sm_path' already exists in the index and is not a submodule")"
 226         fi
 227
 228         if test -z "$force" &&
 229                 ! git add --dry-run --ignore-missing --no-warn-embedded-repo "$sm_path" > /dev/null 2>&1
 230         then
 231                 eval_gettextln "The following path is ignored by one of your .gitignore files:
 232 \$sm_path
 233 Use -f if you really want to add it." >&2
 234                 exit 1
 235         fi
 236
 237         if test -n "$custom_name"
 238         then
 239                 sm_name="$custom_name"
 240         else
 241                 sm_name="$sm_path"
 242         fi
 243
 244         if ! git submodule--helper check-name "$sm_name"
 245         then
 246                 die "$(eval_gettext "'$sm_name' is not a valid submodule name")"
 247         fi
 248
 249         # perhaps the path exists and is already a git repo, else clone it
 250         if test -e "$sm_path"
 251         then
 252                 if test -d "$sm_path"/.git || test -f "$sm_path"/.git
 253                 then
 254                         eval_gettextln "Adding existing repo at '\$sm_path' to the index"
 255                 else
 256                         die "$(eval_gettext "'\$sm_path' already exists and is not a valid git repo")"
 257                 fi
 258
 259         else
 260                 if test -d ".git/modules/$sm_name"
 261                 then
 262                         if test -z "$force"
 263                         then
 264                                 eval_gettextln >&2 "A git directory for '\$sm_name' is found locally with remote(s):"
 265                                 GIT_DIR=".git/modules/$sm_name" GIT_WORK_TREE=. git remote -v | grep '(fetch)' | sed -e s,^,"  ", -e s,' (fetch)',, >&2
 266                                 die "$(eval_gettextln "\
 267 If you want to reuse this local git directory instead of cloning again from
 268   \$realrepo
 269 use the '--force' option. If the local git directory is not the correct repo
 270 or you are unsure what this means choose another name with the '--name' option.")"
 271                         else
 272                                 eval_gettextln "Reactivating local git directory for submodule '\$sm_name'."
 273                         fi
 274                 fi
 275                 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
 276                 (
 277                         sanitize_submodule_env
 278                         cd "$sm_path" &&
 279                         # ash fails to wordsplit ${branch:+-b "$branch"...}
 280                         case "$branch" in
 281                         '') git checkout -f -q ;;
 282                         ?*) git checkout -f -q -B "$branch" "origin/$branch" ;;
 283                         esac
 284                 ) || die "$(eval_gettext "Unable to checkout submodule '\$sm_path'")"
 285         fi
 286         git config submodule."$sm_name".url "$realrepo"
 287
 288         git add --no-warn-embedded-repo $force "$sm_path" ||
 289         die "$(eval_gettext "Failed to add submodule '\$sm_path'")"
 290
 291         git submodule--helper config submodule."$sm_name".path "$sm_path" &&
 292         git submodule--helper config submodule."$sm_name".url "$repo" &&
 293         if test -n "$branch"
 294         then
 295                 git submodule--helper config submodule."$sm_name".branch "$branch"
 296         fi &&
 297         git add --force .gitmodules ||
 298         die "$(eval_gettext "Failed to register submodule '\$sm_path'")"
 299
 300         # NEEDSWORK: In a multi-working-tree world, this needs to be
 301         # set in the per-worktree config.
 302         if git config --get submodule.active >/dev/null
 303         then
 304                 # If the submodule being adding isn't already covered by the
 305                 # current configured pathspec, set the submodule's active flag
 306                 if ! git submodule--helper is-active "$sm_path"
 307                 then
 308                         git config submodule."$sm_name".active "true"
 309                 fi
 310         else
 311                 git config submodule."$sm_name".active "true"
 312         fi
 313 }
 314
 315 #
 316 # Execute an arbitrary command sequence in each checked out
 317 # submodule
 318 #
 319 # $@ = command to execute
 320 #
 321 cmd_foreach()
 322 {
 323         # parse $args after "submodule ... foreach".
 324         while test $# -ne 0
 325         do
 326                 case "$1" in
 327                 -q|--quiet)
 328                         GIT_QUIET=1
 329                         ;;
 330                 --recursive)
 331                         recursive=1
 332                         ;;
 333                 -*)
 334                         usage
 335                         ;;
 336                 *)
 337                         break
 338                         ;;
 339                 esac
 340                 shift
 341         done
 342
 343         git ${wt_prefix:+-C "$wt_prefix"} ${prefix:+--super-prefix "$prefix"} submodule--helper foreach ${GIT_QUIET:+--quiet} ${recursive:+--recursive} "$@"
 344 }
 345
 346 #
 347 # Register submodules in .git/config
 348 #
 349 # $@ = requested paths (default to all)
 350 #
 351 cmd_init()
 352 {
 353         # parse $args after "submodule ... init".
 354         while test $# -ne 0
 355         do
 356                 case "$1" in
 357                 -q|--quiet)
 358                         GIT_QUIET=1
 359                         ;;
 360                 --)
 361                         shift
 362                         break
 363                         ;;
 364                 -*)
 365                         usage
 366                         ;;
 367                 *)
 368                         break
 369                         ;;
 370                 esac
 371                 shift
 372         done
 373
 374         git ${wt_prefix:+-C "$wt_prefix"} ${prefix:+--super-prefix "$prefix"} submodule--helper init ${GIT_QUIET:+--quiet}  "$@"
 375 }
 376
 377 #
 378 # Unregister submodules from .git/config and remove their work tree
 379 #
 380 cmd_deinit()
 381 {
 382         # parse $args after "submodule ... deinit".
 383         deinit_all=
 384         while test $# -ne 0
 385         do
 386                 case "$1" in
 387                 -f|--force)
 388                         force=$1
 389                         ;;
 390                 -q|--quiet)
 391                         GIT_QUIET=1
 392                         ;;
 393                 --all)
 394                         deinit_all=t
 395                         ;;
 396                 --)
 397                         shift
 398                         break
 399                         ;;
 400                 -*)
 401                         usage
 402                         ;;
 403                 *)
 404                         break
 405                         ;;
 406                 esac
 407                 shift
 408         done
 409
 410         git ${wt_prefix:+-C "$wt_prefix"} submodule--helper deinit ${GIT_QUIET:+--quiet} ${prefix:+--prefix "$prefix"} ${force:+--force} ${deinit_all:+--all} "$@"
 411 }
 412
 413 is_tip_reachable () (
 414         sanitize_submodule_env &&
 415         cd "$1" &&
 416         rev=$(git rev-list -n 1 "$2" --not --all 2>/dev/null) &&
 417         test -z "$rev"
 418 )
 419
 420 fetch_in_submodule () (
 421         sanitize_submodule_env &&
 422         cd "$1" &&
 423         case "$2" in
 424         '')
 425                 git fetch ;;
 426         *)
 427                 shift
 428                 git fetch $(get_default_remote) "$@" ;;
 429         esac
 430 )
 431
 432 #
 433 # Update each submodule path to correct revision, using clone and checkout as needed
 434 #
 435 # $@ = requested paths (default to all)
 436 #
 437 cmd_update()
 438 {
 439         # parse $args after "submodule ... update".
 440         while test $# -ne 0
 441         do
 442                 case "$1" in
 443                 -q|--quiet)
 444                         GIT_QUIET=1
 445                         ;;
 446                 -v)
 447                         GIT_QUIET=0
 448                         ;;
 449                 --progress)
 450                         progress=1
 451                         ;;
 452                 -i|--init)
 453                         init=1
 454                         ;;
 455                 --remote)
 456                         remote=1
 457                         ;;
 458                 -N|--no-fetch)
 459                         nofetch=1
 460                         ;;
 461                 -f|--force)
 462                         force=$1
 463                         ;;
 464                 -r|--rebase)
 465                         update="rebase"
 466                         ;;
 467                 --reference)
 468                         case "$2" in '') usage ;; esac
 469                         reference="--reference=$2"
 470                         shift
 471                         ;;
 472                 --reference=*)
 473                         reference="$1"
 474                         ;;
 475                 --dissociate)
 476                         dissociate=1
 477                         ;;
 478                 -m|--merge)
 479                         update="merge"
 480                         ;;
 481                 --recursive)
 482                         recursive=1
 483                         ;;
 484                 --checkout)
 485                         update="checkout"
 486                         ;;
 487                 --recommend-shallow)
 488                         recommend_shallow="--recommend-shallow"
 489                         ;;
 490                 --no-recommend-shallow)
 491                         recommend_shallow="--no-recommend-shallow"
 492                         ;;
 493                 --depth)
 494                         case "$2" in '') usage ;; esac
 495                         depth="--depth=$2"
 496                         shift
 497                         ;;
 498                 --depth=*)
 499                         depth=$1
 500                         ;;
 501                 -j|--jobs)
 502                         case "$2" in '') usage ;; esac
 503                         jobs="--jobs=$2"
 504                         shift
 505                         ;;
 506                 --jobs=*)
 507                         jobs=$1
 508                         ;;
 509                 --)
 510                         shift
 511                         break
 512                         ;;
 513                 -*)
 514                         usage
 515                         ;;
 516                 *)
 517                         break
 518                         ;;
 519                 esac
 520                 shift
 521         done
 522
 523         if test -n "$init"
 524         then
 525                 cmd_init "--" "$@" || return
 526         fi
 527
 528         {
 529         git submodule--helper update-clone ${GIT_QUIET:+--quiet} \
 530                 ${progress:+"--progress"} \
 531                 ${wt_prefix:+--prefix "$wt_prefix"} \
 532                 ${prefix:+--recursive-prefix "$prefix"} \
 533                 ${update:+--update "$update"} \
 534                 ${reference:+"$reference"} \
 535                 ${dissociate:+"--dissociate"} \
 536                 ${depth:+--depth "$depth"} \
 537                 $recommend_shallow \
 538                 $jobs \
 539                 "$@" || echo "#unmatched" $?
 540         } | {
 541         err=
 542         while read -r mode sha1 stage just_cloned sm_path
 543         do
 544                 die_if_unmatched "$mode" "$sha1"
 545
 546                 name=$(git submodule--helper name "$sm_path") || exit
 547                 if ! test -z "$update"
 548                 then
 549                         update_module=$update
 550                 else
 551                         update_module=$(git config submodule."$name".update)
 552                         if test -z "$update_module"
 553                         then
 554                                 update_module="checkout"
 555                         fi
 556                 fi
 557
 558                 displaypath=$(git submodule--helper relative-path "$prefix$sm_path" "$wt_prefix")
 559
 560                 if test $just_cloned -eq 1
 561                 then
 562                         subsha1=
 563                         case "$update_module" in
 564                         merge | rebase | none)
 565                                 update_module=checkout ;;
 566                         esac
 567                 else
 568                         subsha1=$(sanitize_submodule_env; cd "$sm_path" &&
 569                                 git rev-parse --verify HEAD) ||
 570                         die "$(eval_gettext "Unable to find current revision in submodule path '\$displaypath'")"
 571                 fi
 572
 573                 if test -n "$remote"
 574                 then
 575                         branch=$(git submodule--helper remote-branch "$sm_path")
 576                         if test -z "$nofetch"
 577                         then
 578                                 # Fetch remote before determining tracking $sha1
 579                                 fetch_in_submodule "$sm_path" $depth ||
 580                                 die "$(eval_gettext "Unable to fetch in submodule path '\$sm_path'")"
 581                         fi
 582                         remote_name=$(sanitize_submodule_env; cd "$sm_path" && get_default_remote)
 583                         sha1=$(sanitize_submodule_env; cd "$sm_path" &&
 584                                 git rev-parse --verify "${remote_name}/${branch}") ||
 585                         die "$(eval_gettext "Unable to find current \${remote_name}/\${branch} revision in submodule path '\$sm_path'")"
 586                 fi
 587
 588                 if test "$subsha1" != "$sha1" || test -n "$force"
 589                 then
 590                         subforce=$force
 591                         # If we don't already have a -f flag and the submodule has never been checked out
 592                         if test -z "$subsha1" && test -z "$force"
 593                         then
 594                                 subforce="-f"
 595                         fi
 596
 597                         if test -z "$nofetch"
 598                         then
 599                                 # Run fetch only if $sha1 isn't present or it
 600                                 # is not reachable from a ref.
 601                                 is_tip_reachable "$sm_path" "$sha1" ||
 602                                 fetch_in_submodule "$sm_path" $depth ||
 603                                 say "$(eval_gettext "Unable to fetch in submodule path '\$displaypath'")"
 604
 605                                 # Now we tried the usual fetch, but $sha1 may
 606                                 # not be reachable from any of the refs
 607                                 is_tip_reachable "$sm_path" "$sha1" ||
 608                                 fetch_in_submodule "$sm_path" $depth "$sha1" ||
 609                                 die "$(eval_gettext "Fetched in submodule path '\$displaypath', but it did not contain \$sha1. Direct fetching of that commit failed.")"
 610                         fi
 611
 612                         must_die_on_failure=
 613                         case "$update_module" in
 614                         checkout)
 615                                 command="git checkout $subforce -q"
 616                                 die_msg="$(eval_gettext "Unable to checkout '\$sha1' in submodule path '\$displaypath'")"
 617                                 say_msg="$(eval_gettext "Submodule path '\$displaypath': checked out '\$sha1'")"
 618                                 ;;
 619                         rebase)
 620                                 command="git rebase"
 621                                 die_msg="$(eval_gettext "Unable to rebase '\$sha1' in submodule path '\$displaypath'")"
 622                                 say_msg="$(eval_gettext "Submodule path '\$displaypath': rebased into '\$sha1'")"
 623                                 must_die_on_failure=yes
 624                                 ;;
 625                         merge)
 626                                 command="git merge"
 627                                 die_msg="$(eval_gettext "Unable to merge '\$sha1' in submodule path '\$displaypath'")"
 628                                 say_msg="$(eval_gettext "Submodule path '\$displaypath': merged in '\$sha1'")"
 629                                 must_die_on_failure=yes
 630                                 ;;
 631                         !*)
 632                                 command="${update_module#!}"
 633                                 die_msg="$(eval_gettext "Execution of '\$command \$sha1' failed in submodule path '\$displaypath'")"
 634                                 say_msg="$(eval_gettext "Submodule path '\$displaypath': '\$command \$sha1'")"
 635                                 must_die_on_failure=yes
 636                                 ;;
 637                         *)
 638                                 die "$(eval_gettext "Invalid update mode '$update_module' for submodule '$name'")"
 639                         esac
 640
 641                         if (sanitize_submodule_env; cd "$sm_path" && $command "$sha1")
 642                         then
 643                                 say "$say_msg"
 644                         elif test -n "$must_die_on_failure"
 645                         then
 646                                 die_with_status 2 "$die_msg"
 647                         else
 648                                 err="${err};$die_msg"
 649                                 continue
 650                         fi
 651                 fi
 652
 653                 if test -n "$recursive"
 654                 then
 655                         (
 656                                 prefix=$(git submodule--helper relative-path "$prefix$sm_path/" "$wt_prefix")
 657                                 wt_prefix=
 658                                 sanitize_submodule_env
 659                                 cd "$sm_path" &&
 660                                 eval cmd_update
 661                         )
 662                         res=$?
 663                         if test $res -gt 0
 664                         then
 665                                 die_msg="$(eval_gettext "Failed to recurse into submodule path '\$displaypath'")"
 666                                 if test $res -ne 2
 667                                 then
 668                                         err="${err};$die_msg"
 669                                         continue
 670                                 else
 671                                         die_with_status $res "$die_msg"
 672                                 fi
 673                         fi
 674                 fi
 675         done
 676
 677         if test -n "$err"
 678         then
 679                 OIFS=$IFS
 680                 IFS=';'
 681                 for e in $err
 682                 do
 683                         if test -n "$e"
 684                         then
 685                                 echo >&2 "$e"
 686                         fi
 687                 done
 688                 IFS=$OIFS
 689                 exit 1
 690         fi
 691         }
 692 }
 693
 694 #
 695 # Show commit summary for submodules in index or working tree
 696 #
 697 # If '--cached' is given, show summary between index and given commit,
 698 # or between working tree and given commit
 699 #
 700 # $@ = [commit (default 'HEAD'),] requested paths (default all)
 701 #
 702 cmd_summary() {
 703         summary_limit=-1
 704         for_status=
 705         diff_cmd=diff-index
 706
 707         # parse $args after "submodule ... summary".
 708         while test $# -ne 0
 709         do
 710                 case "$1" in
 711                 --cached)
 712                         cached="$1"
 713                         ;;
 714                 --files)
 715                         files="$1"
 716                         ;;
 717                 --for-status)
 718                         for_status="$1"
 719                         ;;
 720                 -n|--summary-limit)
 721                         summary_limit="$2"
 722                         isnumber "$summary_limit" || usage
 723                         shift
 724                         ;;
 725                 --summary-limit=*)
 726                         summary_limit="${1#--summary-limit=}"
 727                         isnumber "$summary_limit" || usage
 728                         ;;
 729                 --)
 730                         shift
 731                         break
 732                         ;;
 733                 -*)
 734                         usage
 735                         ;;
 736                 *)
 737                         break
 738                         ;;
 739                 esac
 740                 shift
 741         done
 742
 743         test $summary_limit = 0 && return
 744
 745         if rev=$(git rev-parse -q --verify --default HEAD ${1+"$1"})
 746         then
 747                 head=$rev
 748                 test $# = 0 || shift
 749         elif test -z "$1" || test "$1" = "HEAD"
 750         then
 751                 # before the first commit: compare with an empty tree
 752                 head=$(git hash-object -w -t tree --stdin </dev/null)
 753                 test -z "$1" || shift
 754         else
 755                 head="HEAD"
 756         fi
 757
 758         if [ -n "$files" ]
 759         then
 760                 test -n "$cached" &&
 761                 die "$(gettext "The --cached option cannot be used with the --files option")"
 762                 diff_cmd=diff-files
 763                 head=
 764         fi
 765
 766         cd_to_toplevel
 767         eval "set $(git rev-parse --sq --prefix "$wt_prefix" -- "$@")"
 768         # Get modified modules cared by user
 769         modules=$(git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- "$@" |
 770                 sane_egrep '^:([0-7]* )?160000' |
 771                 while read -r mod_src mod_dst sha1_src sha1_dst status sm_path
 772                 do
 773                         # Always show modules deleted or type-changed (blob<->module)
 774                         if test "$status" = D || test "$status" = T
 775                         then
 776                                 printf '%s\n' "$sm_path"
 777                                 continue
 778                         fi
 779                         # Respect the ignore setting for --for-status.
 780                         if test -n "$for_status"
 781                         then
 782                                 name=$(git submodule--helper name "$sm_path")
 783                                 ignore_config=$(get_submodule_config "$name" ignore none)
 784                                 test $status != A && test $ignore_config = all && continue
 785                         fi
 786                         # Also show added or modified modules which are checked out
 787                         GIT_DIR="$sm_path/.git" git rev-parse --git-dir >/dev/null 2>&1 &&
 788                         printf '%s\n' "$sm_path"
 789                 done
 790         )
 791
 792         test -z "$modules" && return
 793
 794         git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- $modules |
 795         sane_egrep '^:([0-7]* )?160000' |
 796         cut -c2- |
 797         while read -r mod_src mod_dst sha1_src sha1_dst status name
 798         do
 799                 if test -z "$cached" &&
 800                         test $sha1_dst = 0000000000000000000000000000000000000000
 801                 then
 802                         case "$mod_dst" in
 803                         160000)
 804                                 sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
 805                                 ;;
 806                         100644 | 100755 | 120000)
 807                                 sha1_dst=$(git hash-object $name)
 808                                 ;;
 809                         000000)
 810                                 ;; # removed
 811                         *)
 812                                 # unexpected type
 813                                 eval_gettextln "unexpected mode \$mod_dst" >&2
 814                                 continue ;;
 815                         esac
 816                 fi
 817                 missing_src=
 818                 missing_dst=
 819
 820                 test $mod_src = 160000 &&
 821                 ! GIT_DIR="$name/.git" git rev-parse -q --verify $sha1_src^0 >/dev/null &&
 822                 missing_src=t
 823
 824                 test $mod_dst = 160000 &&
 825                 ! GIT_DIR="$name/.git" git rev-parse -q --verify $sha1_dst^0 >/dev/null &&
 826                 missing_dst=t
 827
 828                 display_name=$(git submodule--helper relative-path "$name" "$wt_prefix")
 829
 830                 total_commits=
 831                 case "$missing_src,$missing_dst" in
 832                 t,)
 833                         errmsg="$(eval_gettext "  Warn: \$display_name doesn't contain commit \$sha1_src")"
 834                         ;;
 835                 ,t)
 836                         errmsg="$(eval_gettext "  Warn: \$display_name doesn't contain commit \$sha1_dst")"
 837                         ;;
 838                 t,t)
 839                         errmsg="$(eval_gettext "  Warn: \$display_name doesn't contain commits \$sha1_src and \$sha1_dst")"
 840                         ;;
 841                 *)
 842                         errmsg=
 843                         total_commits=$(
 844                         if test $mod_src = 160000 && test $mod_dst = 160000
 845                         then
 846                                 range="$sha1_src...$sha1_dst"
 847                         elif test $mod_src = 160000
 848                         then
 849                                 range=$sha1_src
 850                         else
 851                                 range=$sha1_dst
 852                         fi
 853                         GIT_DIR="$name/.git" \
 854                         git rev-list --first-parent $range -- | wc -l
 855                         )
 856                         total_commits=" ($(($total_commits + 0)))"
 857                         ;;
 858                 esac
 859
 860                 sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
 861                 sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
 862                 if test $status = T
 863                 then
 864                         blob="$(gettext "blob")"
 865                         submodule="$(gettext "submodule")"
 866                         if test $mod_dst = 160000
 867                         then
 868                                 echo "* $display_name $sha1_abbr_src($blob)->$sha1_abbr_dst($submodule)$total_commits:"
 869                         else
 870                                 echo "* $display_name $sha1_abbr_src($submodule)->$sha1_abbr_dst($blob)$total_commits:"
 871                         fi
 872                 else
 873                         echo "* $display_name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
 874                 fi
 875                 if test -n "$errmsg"
 876                 then
 877                         # Don't give error msg for modification whose dst is not submodule
 878                         # i.e. deleted or changed to blob
 879                         test $mod_dst = 160000 && echo "$errmsg"
 880                 else
 881                         if test $mod_src = 160000 && test $mod_dst = 160000
 882                         then
 883                                 limit=
 884                                 test $summary_limit -gt 0 && limit="-$summary_limit"
 885                                 GIT_DIR="$name/.git" \
 886                                 git log $limit --pretty='format:  %m %s' \
 887                                 --first-parent $sha1_src...$sha1_dst
 888                         elif test $mod_dst = 160000
 889                         then
 890                                 GIT_DIR="$name/.git" \
 891                                 git log --pretty='format:  > %s' -1 $sha1_dst
 892                         else
 893                                 GIT_DIR="$name/.git" \
 894                                 git log --pretty='format:  < %s' -1 $sha1_src
 895                         fi
 896                         echo
 897                 fi
 898                 echo
 899         done
 900 }
 901 #
 902 # List all submodules, prefixed with:
 903 #  - submodule not initialized
 904 #  + different revision checked out
 905 #
 906 # If --cached was specified the revision in the index will be printed
 907 # instead of the currently checked out revision.
 908 #
 909 # $@ = requested paths (default to all)
 910 #
 911 cmd_status()
 912 {
 913         # parse $args after "submodule ... status".
 914         while test $# -ne 0
 915         do
 916                 case "$1" in
 917                 -q|--quiet)
 918                         GIT_QUIET=1
 919                         ;;
 920                 --cached)
 921                         cached=1
 922                         ;;
 923                 --recursive)
 924                         recursive=1
 925                         ;;
 926                 --)
 927                         shift
 928                         break
 929                         ;;
 930                 -*)
 931                         usage
 932                         ;;
 933                 *)
 934                         break
 935                         ;;
 936                 esac
 937                 shift
 938         done
 939
 940         git ${wt_prefix:+-C "$wt_prefix"} ${prefix:+--super-prefix "$prefix"} submodule--helper status ${GIT_QUIET:+--quiet} ${cached:+--cached} ${recursive:+--recursive} "$@"
 941 }
 942 #
 943 # Sync remote urls for submodules
 944 # This makes the value for remote.$remote.url match the value
 945 # specified in .gitmodules.
 946 #
 947 cmd_sync()
 948 {
 949         while test $# -ne 0
 950         do
 951                 case "$1" in
 952                 -q|--quiet)
 953                         GIT_QUIET=1
 954                         shift
 955                         ;;
 956                 --recursive)
 957                         recursive=1
 958                         shift
 959                         ;;
 960                 --)
 961                         shift
 962                         break
 963                         ;;
 964                 -*)
 965                         usage
 966                         ;;
 967                 *)
 968                         break
 969                         ;;
 970                 esac
 971         done
 972
 973         git ${wt_prefix:+-C "$wt_prefix"} ${prefix:+--super-prefix "$prefix"} submodule--helper sync ${GIT_QUIET:+--quiet} ${recursive:+--recursive} "$@"
 974 }
 975
 976 cmd_absorbgitdirs()
 977 {
 978         git submodule--helper absorb-git-dirs --prefix "$wt_prefix" "$@"
 979 }
 980
 981 # This loop parses the command line arguments to find the
 982 # subcommand name to dispatch.  Parsing of the subcommand specific
 983 # options are primarily done by the subcommand implementations.
 984 # Subcommand specific options such as --branch and --cached are
 985 # parsed here as well, for backward compatibility.
 986
 987 while test $# != 0 && test -z "$command"
 988 do
 989         case "$1" in
 990         add | foreach | init | deinit | update | status | summary | sync | absorbgitdirs)
 991                 command=$1
 992                 ;;
 993         -q|--quiet)
 994                 GIT_QUIET=1
 995                 ;;
 996         -b|--branch)
 997                 case "$2" in
 998                 '')
 999                         usage
1000                         ;;
1001                 esac
1002                 branch="$2"; shift
1003                 ;;
1004         --cached)
1005                 cached="$1"
1006                 ;;
1007         --)
1008                 break
1009                 ;;
1010         -*)
1011                 usage
1012                 ;;
1013         *)
1014                 break
1015                 ;;
1016         esac
1017         shift
1018 done
1019
1020 # No command word defaults to "status"
1021 if test -z "$command"
1022 then
1023     if test $# = 0
1024     then
1025         command=status
1026     else
1027         usage
1028     fi
1029 fi
1030
1031 # "-b branch" is accepted only by "add"
1032 if test -n "$branch" && test "$command" != add
1033 then
1034         usage
1035 fi
1036
1037 # "--cached" is accepted only by "status" and "summary"
1038 if test -n "$cached" && test "$command" != status && test "$command" != summary
1039 then
1040         usage
1041 fi
1042
1043 "cmd_$command" "$@"