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                 --progress)
 442                         progress=1
 443                         ;;
 444                 -i|--init)
 445                         init=1
 446                         ;;
 447                 --remote)
 448                         remote=1
 449                         ;;
 450                 -N|--no-fetch)
 451                         nofetch=1
 452                         ;;
 453                 -f|--force)
 454                         force=$1
 455                         ;;
 456                 -r|--rebase)
 457                         update="rebase"
 458                         ;;
 459                 --reference)
 460                         case "$2" in '') usage ;; esac
 461                         reference="--reference=$2"
 462                         shift
 463                         ;;
 464                 --reference=*)
 465                         reference="$1"
 466                         ;;
 467                 --dissociate)
 468                         dissociate=1
 469                         ;;
 470                 -m|--merge)
 471                         update="merge"
 472                         ;;
 473                 --recursive)
 474                         recursive=1
 475                         ;;
 476                 --checkout)
 477                         update="checkout"
 478                         ;;
 479                 --recommend-shallow)
 480                         recommend_shallow="--recommend-shallow"
 481                         ;;
 482                 --no-recommend-shallow)
 483                         recommend_shallow="--no-recommend-shallow"
 484                         ;;
 485                 --depth)
 486                         case "$2" in '') usage ;; esac
 487                         depth="--depth=$2"
 488                         shift
 489                         ;;
 490                 --depth=*)
 491                         depth=$1
 492                         ;;
 493                 -j|--jobs)
 494                         case "$2" in '') usage ;; esac
 495                         jobs="--jobs=$2"
 496                         shift
 497                         ;;
 498                 --jobs=*)
 499                         jobs=$1
 500                         ;;
 501                 --)
 502                         shift
 503                         break
 504                         ;;
 505                 -*)
 506                         usage
 507                         ;;
 508                 *)
 509                         break
 510                         ;;
 511                 esac
 512                 shift
 513         done
 514
 515         if test -n "$init"
 516         then
 517                 cmd_init "--" "$@" || return
 518         fi
 519
 520         {
 521         git submodule--helper update-clone ${GIT_QUIET:+--quiet} \
 522                 ${progress:+"--progress"} \
 523                 ${wt_prefix:+--prefix "$wt_prefix"} \
 524                 ${prefix:+--recursive-prefix "$prefix"} \
 525                 ${update:+--update "$update"} \
 526                 ${reference:+"$reference"} \
 527                 ${dissociate:+"--dissociate"} \
 528                 ${depth:+--depth "$depth"} \
 529                 $recommend_shallow \
 530                 $jobs \
 531                 "$@" || echo "#unmatched" $?
 532         } | {
 533         err=
 534         while read -r mode sha1 stage just_cloned sm_path
 535         do
 536                 die_if_unmatched "$mode" "$sha1"
 537
 538                 name=$(git submodule--helper name "$sm_path") || exit
 539                 if ! test -z "$update"
 540                 then
 541                         update_module=$update
 542                 else
 543                         update_module=$(git config submodule."$name".update)
 544                         if test -z "$update_module"
 545                         then
 546                                 update_module="checkout"
 547                         fi
 548                 fi
 549
 550                 displaypath=$(git submodule--helper relative-path "$prefix$sm_path" "$wt_prefix")
 551
 552                 if test $just_cloned -eq 1
 553                 then
 554                         subsha1=
 555                         case "$update_module" in
 556                         merge | rebase | none)
 557                                 update_module=checkout ;;
 558                         esac
 559                 else
 560                         subsha1=$(sanitize_submodule_env; cd "$sm_path" &&
 561                                 git rev-parse --verify HEAD) ||
 562                         die "$(eval_gettext "Unable to find current revision in submodule path '\$displaypath'")"
 563                 fi
 564
 565                 if test -n "$remote"
 566                 then
 567                         branch=$(git submodule--helper remote-branch "$sm_path")
 568                         if test -z "$nofetch"
 569                         then
 570                                 # Fetch remote before determining tracking $sha1
 571                                 fetch_in_submodule "$sm_path" $depth ||
 572                                 die "$(eval_gettext "Unable to fetch in submodule path '\$sm_path'")"
 573                         fi
 574                         remote_name=$(sanitize_submodule_env; cd "$sm_path" && get_default_remote)
 575                         sha1=$(sanitize_submodule_env; cd "$sm_path" &&
 576                                 git rev-parse --verify "${remote_name}/${branch}") ||
 577                         die "$(eval_gettext "Unable to find current \${remote_name}/\${branch} revision in submodule path '\$sm_path'")"
 578                 fi
 579
 580                 if test "$subsha1" != "$sha1" || test -n "$force"
 581                 then
 582                         subforce=$force
 583                         # If we don't already have a -f flag and the submodule has never been checked out
 584                         if test -z "$subsha1" && test -z "$force"
 585                         then
 586                                 subforce="-f"
 587                         fi
 588
 589                         if test -z "$nofetch"
 590                         then
 591                                 # Run fetch only if $sha1 isn't present or it
 592                                 # is not reachable from a ref.
 593                                 is_tip_reachable "$sm_path" "$sha1" ||
 594                                 fetch_in_submodule "$sm_path" $depth ||
 595                                 say "$(eval_gettext "Unable to fetch in submodule path '\$displaypath'")"
 596
 597                                 # Now we tried the usual fetch, but $sha1 may
 598                                 # not be reachable from any of the refs
 599                                 is_tip_reachable "$sm_path" "$sha1" ||
 600                                 fetch_in_submodule "$sm_path" $depth "$sha1" ||
 601                                 die "$(eval_gettext "Fetched in submodule path '\$displaypath', but it did not contain \$sha1. Direct fetching of that commit failed.")"
 602                         fi
 603
 604                         must_die_on_failure=
 605                         case "$update_module" in
 606                         checkout)
 607                                 command="git checkout $subforce -q"
 608                                 die_msg="$(eval_gettext "Unable to checkout '\$sha1' in submodule path '\$displaypath'")"
 609                                 say_msg="$(eval_gettext "Submodule path '\$displaypath': checked out '\$sha1'")"
 610                                 ;;
 611                         rebase)
 612                                 command="git rebase"
 613                                 die_msg="$(eval_gettext "Unable to rebase '\$sha1' in submodule path '\$displaypath'")"
 614                                 say_msg="$(eval_gettext "Submodule path '\$displaypath': rebased into '\$sha1'")"
 615                                 must_die_on_failure=yes
 616                                 ;;
 617                         merge)
 618                                 command="git merge"
 619                                 die_msg="$(eval_gettext "Unable to merge '\$sha1' in submodule path '\$displaypath'")"
 620                                 say_msg="$(eval_gettext "Submodule path '\$displaypath': merged in '\$sha1'")"
 621                                 must_die_on_failure=yes
 622                                 ;;
 623                         !*)
 624                                 command="${update_module#!}"
 625                                 die_msg="$(eval_gettext "Execution of '\$command \$sha1' failed in submodule path '\$displaypath'")"
 626                                 say_msg="$(eval_gettext "Submodule path '\$displaypath': '\$command \$sha1'")"
 627                                 must_die_on_failure=yes
 628                                 ;;
 629                         *)
 630                                 die "$(eval_gettext "Invalid update mode '$update_module' for submodule '$name'")"
 631                         esac
 632
 633                         if (sanitize_submodule_env; cd "$sm_path" && $command "$sha1")
 634                         then
 635                                 say "$say_msg"
 636                         elif test -n "$must_die_on_failure"
 637                         then
 638                                 die_with_status 2 "$die_msg"
 639                         else
 640                                 err="${err};$die_msg"
 641                                 continue
 642                         fi
 643                 fi
 644
 645                 if test -n "$recursive"
 646                 then
 647                         (
 648                                 prefix=$(git submodule--helper relative-path "$prefix$sm_path/" "$wt_prefix")
 649                                 wt_prefix=
 650                                 sanitize_submodule_env
 651                                 cd "$sm_path" &&
 652                                 eval cmd_update
 653                         )
 654                         res=$?
 655                         if test $res -gt 0
 656                         then
 657                                 die_msg="$(eval_gettext "Failed to recurse into submodule path '\$displaypath'")"
 658                                 if test $res -ne 2
 659                                 then
 660                                         err="${err};$die_msg"
 661                                         continue
 662                                 else
 663                                         die_with_status $res "$die_msg"
 664                                 fi
 665                         fi
 666                 fi
 667         done
 668
 669         if test -n "$err"
 670         then
 671                 OIFS=$IFS
 672                 IFS=';'
 673                 for e in $err
 674                 do
 675                         if test -n "$e"
 676                         then
 677                                 echo >&2 "$e"
 678                         fi
 679                 done
 680                 IFS=$OIFS
 681                 exit 1
 682         fi
 683         }
 684 }
 685
 686 #
 687 # Show commit summary for submodules in index or working tree
 688 #
 689 # If '--cached' is given, show summary between index and given commit,
 690 # or between working tree and given commit
 691 #
 692 # $@ = [commit (default 'HEAD'),] requested paths (default all)
 693 #
 694 cmd_summary() {
 695         summary_limit=-1
 696         for_status=
 697         diff_cmd=diff-index
 698
 699         # parse $args after "submodule ... summary".
 700         while test $# -ne 0
 701         do
 702                 case "$1" in
 703                 --cached)
 704                         cached="$1"
 705                         ;;
 706                 --files)
 707                         files="$1"
 708                         ;;
 709                 --for-status)
 710                         for_status="$1"
 711                         ;;
 712                 -n|--summary-limit)
 713                         summary_limit="$2"
 714                         isnumber "$summary_limit" || usage
 715                         shift
 716                         ;;
 717                 --summary-limit=*)
 718                         summary_limit="${1#--summary-limit=}"
 719                         isnumber "$summary_limit" || usage
 720                         ;;
 721                 --)
 722                         shift
 723                         break
 724                         ;;
 725                 -*)
 726                         usage
 727                         ;;
 728                 *)
 729                         break
 730                         ;;
 731                 esac
 732                 shift
 733         done
 734
 735         test $summary_limit = 0 && return
 736
 737         if rev=$(git rev-parse -q --verify --default HEAD ${1+"$1"})
 738         then
 739                 head=$rev
 740                 test $# = 0 || shift
 741         elif test -z "$1" || test "$1" = "HEAD"
 742         then
 743                 # before the first commit: compare with an empty tree
 744                 head=$(git hash-object -w -t tree --stdin </dev/null)
 745                 test -z "$1" || shift
 746         else
 747                 head="HEAD"
 748         fi
 749
 750         if [ -n "$files" ]
 751         then
 752                 test -n "$cached" &&
 753                 die "$(gettext "The --cached option cannot be used with the --files option")"
 754                 diff_cmd=diff-files
 755                 head=
 756         fi
 757
 758         cd_to_toplevel
 759         eval "set $(git rev-parse --sq --prefix "$wt_prefix" -- "$@")"
 760         # Get modified modules cared by user
 761         modules=$(git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- "$@" |
 762                 sane_egrep '^:([0-7]* )?160000' |
 763                 while read -r mod_src mod_dst sha1_src sha1_dst status sm_path
 764                 do
 765                         # Always show modules deleted or type-changed (blob<->module)
 766                         if test "$status" = D || test "$status" = T
 767                         then
 768                                 printf '%s\n' "$sm_path"
 769                                 continue
 770                         fi
 771                         # Respect the ignore setting for --for-status.
 772                         if test -n "$for_status"
 773                         then
 774                                 name=$(git submodule--helper name "$sm_path")
 775                                 ignore_config=$(get_submodule_config "$name" ignore none)
 776                                 test $status != A && test $ignore_config = all && continue
 777                         fi
 778                         # Also show added or modified modules which are checked out
 779                         GIT_DIR="$sm_path/.git" git rev-parse --git-dir >/dev/null 2>&1 &&
 780                         printf '%s\n' "$sm_path"
 781                 done
 782         )
 783
 784         test -z "$modules" && return
 785
 786         git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- $modules |
 787         sane_egrep '^:([0-7]* )?160000' |
 788         cut -c2- |
 789         while read -r mod_src mod_dst sha1_src sha1_dst status name
 790         do
 791                 if test -z "$cached" &&
 792                         test $sha1_dst = 0000000000000000000000000000000000000000
 793                 then
 794                         case "$mod_dst" in
 795                         160000)
 796                                 sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
 797                                 ;;
 798                         100644 | 100755 | 120000)
 799                                 sha1_dst=$(git hash-object $name)
 800                                 ;;
 801                         000000)
 802                                 ;; # removed
 803                         *)
 804                                 # unexpected type
 805                                 eval_gettextln "unexpected mode \$mod_dst" >&2
 806                                 continue ;;
 807                         esac
 808                 fi
 809                 missing_src=
 810                 missing_dst=
 811
 812                 test $mod_src = 160000 &&
 813                 ! GIT_DIR="$name/.git" git rev-parse -q --verify $sha1_src^0 >/dev/null &&
 814                 missing_src=t
 815
 816                 test $mod_dst = 160000 &&
 817                 ! GIT_DIR="$name/.git" git rev-parse -q --verify $sha1_dst^0 >/dev/null &&
 818                 missing_dst=t
 819
 820                 display_name=$(git submodule--helper relative-path "$name" "$wt_prefix")
 821
 822                 total_commits=
 823                 case "$missing_src,$missing_dst" in
 824                 t,)
 825                         errmsg="$(eval_gettext "  Warn: \$display_name doesn't contain commit \$sha1_src")"
 826                         ;;
 827                 ,t)
 828                         errmsg="$(eval_gettext "  Warn: \$display_name doesn't contain commit \$sha1_dst")"
 829                         ;;
 830                 t,t)
 831                         errmsg="$(eval_gettext "  Warn: \$display_name doesn't contain commits \$sha1_src and \$sha1_dst")"
 832                         ;;
 833                 *)
 834                         errmsg=
 835                         total_commits=$(
 836                         if test $mod_src = 160000 && test $mod_dst = 160000
 837                         then
 838                                 range="$sha1_src...$sha1_dst"
 839                         elif test $mod_src = 160000
 840                         then
 841                                 range=$sha1_src
 842                         else
 843                                 range=$sha1_dst
 844                         fi
 845                         GIT_DIR="$name/.git" \
 846                         git rev-list --first-parent $range -- | wc -l
 847                         )
 848                         total_commits=" ($(($total_commits + 0)))"
 849                         ;;
 850                 esac
 851
 852                 sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
 853                 sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
 854                 if test $status = T
 855                 then
 856                         blob="$(gettext "blob")"
 857                         submodule="$(gettext "submodule")"
 858                         if test $mod_dst = 160000
 859                         then
 860                                 echo "* $display_name $sha1_abbr_src($blob)->$sha1_abbr_dst($submodule)$total_commits:"
 861                         else
 862                                 echo "* $display_name $sha1_abbr_src($submodule)->$sha1_abbr_dst($blob)$total_commits:"
 863                         fi
 864                 else
 865                         echo "* $display_name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
 866                 fi
 867                 if test -n "$errmsg"
 868                 then
 869                         # Don't give error msg for modification whose dst is not submodule
 870                         # i.e. deleted or changed to blob
 871                         test $mod_dst = 160000 && echo "$errmsg"
 872                 else
 873                         if test $mod_src = 160000 && test $mod_dst = 160000
 874                         then
 875                                 limit=
 876                                 test $summary_limit -gt 0 && limit="-$summary_limit"
 877                                 GIT_DIR="$name/.git" \
 878                                 git log $limit --pretty='format:  %m %s' \
 879                                 --first-parent $sha1_src...$sha1_dst
 880                         elif test $mod_dst = 160000
 881                         then
 882                                 GIT_DIR="$name/.git" \
 883                                 git log --pretty='format:  > %s' -1 $sha1_dst
 884                         else
 885                                 GIT_DIR="$name/.git" \
 886                                 git log --pretty='format:  < %s' -1 $sha1_src
 887                         fi
 888                         echo
 889                 fi
 890                 echo
 891         done
 892 }
 893 #
 894 # List all submodules, prefixed with:
 895 #  - submodule not initialized
 896 #  + different revision checked out
 897 #
 898 # If --cached was specified the revision in the index will be printed
 899 # instead of the currently checked out revision.
 900 #
 901 # $@ = requested paths (default to all)
 902 #
 903 cmd_status()
 904 {
 905         # parse $args after "submodule ... status".
 906         while test $# -ne 0
 907         do
 908                 case "$1" in
 909                 -q|--quiet)
 910                         GIT_QUIET=1
 911                         ;;
 912                 --cached)
 913                         cached=1
 914                         ;;
 915                 --recursive)
 916                         recursive=1
 917                         ;;
 918                 --)
 919                         shift
 920                         break
 921                         ;;
 922                 -*)
 923                         usage
 924                         ;;
 925                 *)
 926                         break
 927                         ;;
 928                 esac
 929                 shift
 930         done
 931
 932         git ${wt_prefix:+-C "$wt_prefix"} ${prefix:+--super-prefix "$prefix"} submodule--helper status ${GIT_QUIET:+--quiet} ${cached:+--cached} ${recursive:+--recursive} "$@"
 933 }
 934 #
 935 # Sync remote urls for submodules
 936 # This makes the value for remote.$remote.url match the value
 937 # specified in .gitmodules.
 938 #
 939 cmd_sync()
 940 {
 941         while test $# -ne 0
 942         do
 943                 case "$1" in
 944                 -q|--quiet)
 945                         GIT_QUIET=1
 946                         shift
 947                         ;;
 948                 --recursive)
 949                         recursive=1
 950                         shift
 951                         ;;
 952                 --)
 953                         shift
 954                         break
 955                         ;;
 956                 -*)
 957                         usage
 958                         ;;
 959                 *)
 960                         break
 961                         ;;
 962                 esac
 963         done
 964
 965         git ${wt_prefix:+-C "$wt_prefix"} ${prefix:+--super-prefix "$prefix"} submodule--helper sync ${GIT_QUIET:+--quiet} ${recursive:+--recursive} "$@"
 966 }
 967
 968 cmd_absorbgitdirs()
 969 {
 970         git submodule--helper absorb-git-dirs --prefix "$wt_prefix" "$@"
 971 }
 972
 973 # This loop parses the command line arguments to find the
 974 # subcommand name to dispatch.  Parsing of the subcommand specific
 975 # options are primarily done by the subcommand implementations.
 976 # Subcommand specific options such as --branch and --cached are
 977 # parsed here as well, for backward compatibility.
 978
 979 while test $# != 0 && test -z "$command"
 980 do
 981         case "$1" in
 982         add | foreach | init | deinit | update | status | summary | sync | absorbgitdirs)
 983                 command=$1
 984                 ;;
 985         -q|--quiet)
 986                 GIT_QUIET=1
 987                 ;;
 988         -b|--branch)
 989                 case "$2" in
 990                 '')
 991                         usage
 992                         ;;
 993                 esac
 994                 branch="$2"; shift
 995                 ;;
 996         --cached)
 997                 cached="$1"
 998                 ;;
 999         --)
1000                 break
1001                 ;;
1002         -*)
1003                 usage
1004                 ;;
1005         *)
1006                 break
1007                 ;;
1008         esac
1009         shift
1010 done
1011
1012 # No command word defaults to "status"
1013 if test -z "$command"
1014 then
1015     if test $# = 0
1016     then
1017         command=status
1018     else
1019         usage
1020     fi
1021 fi
1022
1023 # "-b branch" is accepted only by "add"
1024 if test -n "$branch" && test "$command" != add
1025 then
1026         usage
1027 fi
1028
1029 # "--cached" is accepted only by "status" and "summary"
1030 if test -n "$cached" && test "$command" != status && test "$command" != summary
1031 then
1032         usage
1033 fi
1034
1035 "cmd_$command" "$@"