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