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
  46 die_if_unmatched ()
  47 {
  48         if test "$1" = "#unmatched"
  49         then
  50                 exit ${2:-1}
  51         fi
  52 }
  53
  54 #
  55 # Print a submodule configuration setting
  56 #
  57 # $1 = submodule name
  58 # $2 = option name
  59 # $3 = default value
  60 #
  61 # Checks in the usual git-config places first (for overrides),
  62 # otherwise it falls back on .gitmodules.  This allows you to
  63 # distribute project-wide defaults in .gitmodules, while still
  64 # customizing individual repositories if necessary.  If the option is
  65 # not in .gitmodules either, print a default value.
  66 #
  67 get_submodule_config () {
  68         name="$1"
  69         option="$2"
  70         default="$3"
  71         value=$(git config submodule."$name"."$option")
  72         if test -z "$value"
  73         then
  74                 value=$(git config -f .gitmodules submodule."$name"."$option")
  75         fi
  76         printf '%s' "${value:-$default}"
  77 }
  78
  79 isnumber()
  80 {
  81         n=$(($1 + 0)) 2>/dev/null && test "$n" = "$1"
  82 }
  83
  84 # Sanitize the local git environment for use within a submodule. We
  85 # can't simply use clear_local_git_env since we want to preserve some
  86 # of the settings from GIT_CONFIG_PARAMETERS.
  87 sanitize_submodule_env()
  88 {
  89         save_config=$GIT_CONFIG_PARAMETERS
  90         clear_local_git_env
  91         GIT_CONFIG_PARAMETERS=$save_config
  92         export GIT_CONFIG_PARAMETERS
  93 }
  94
  95 #
  96 # Add a new submodule to the working tree, .gitmodules and the index
  97 #
  98 # $@ = repo path
  99 #
 100 # optional branch is stored in global branch variable
 101 #
 102 cmd_add()
 103 {
 104         # parse $args after "submodule ... add".
 105         reference_path=
 106         while test $# -ne 0
 107         do
 108                 case "$1" in
 109                 -b | --branch)
 110                         case "$2" in '') usage ;; esac
 111                         branch=$2
 112                         shift
 113                         ;;
 114                 -f | --force)
 115                         force=$1
 116                         ;;
 117                 -q|--quiet)
 118                         GIT_QUIET=1
 119                         ;;
 120                 --reference)
 121                         case "$2" in '') usage ;; esac
 122                         reference_path=$2
 123                         shift
 124                         ;;
 125                 --reference=*)
 126                         reference_path="${1#--reference=}"
 127                         ;;
 128                 --name)
 129                         case "$2" in '') usage ;; esac
 130                         custom_name=$2
 131                         shift
 132                         ;;
 133                 --depth)
 134                         case "$2" in '') usage ;; esac
 135                         depth="--depth=$2"
 136                         shift
 137                         ;;
 138                 --depth=*)
 139                         depth=$1
 140                         ;;
 141                 --)
 142                         shift
 143                         break
 144                         ;;
 145                 -*)
 146                         usage
 147                         ;;
 148                 *)
 149                         break
 150                         ;;
 151                 esac
 152                 shift
 153         done
 154
 155         if test -n "$reference_path"
 156         then
 157                 is_absolute_path "$reference_path" ||
 158                 reference_path="$wt_prefix$reference_path"
 159
 160                 reference="--reference=$reference_path"
 161         fi
 162
 163         repo=$1
 164         sm_path=$2
 165
 166         if test -z "$sm_path"; then
 167                 sm_path=$(printf '%s\n' "$repo" |
 168                         sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
 169         fi
 170
 171         if test -z "$repo" || test -z "$sm_path"; then
 172                 usage
 173         fi
 174
 175         is_absolute_path "$sm_path" || sm_path="$wt_prefix$sm_path"
 176
 177         # assure repo is absolute or relative to parent
 178         case "$repo" in
 179         ./*|../*)
 180                 test -z "$wt_prefix" ||
 181                 die "$(gettext "Relative path can only be used from the toplevel of the working tree")"
 182
 183                 # dereference source url relative to parent's url
 184                 realrepo=$(git submodule--helper resolve-relative-url "$repo") || exit
 185                 ;;
 186         *:*|/*)
 187                 # absolute url
 188                 realrepo=$repo
 189                 ;;
 190         *)
 191                 die "$(eval_gettext "repo URL: '\$repo' must be absolute or begin with ./|../")"
 192         ;;
 193         esac
 194
 195         # normalize path:
 196         # multiple //; leading ./; /./; /../; trailing /
 197         sm_path=$(printf '%s/\n' "$sm_path" |
 198                 sed -e '
 199                         s|//*|/|g
 200                         s|^\(\./\)*||
 201                         s|/\(\./\)*|/|g
 202                         :start
 203                         s|\([^/]*\)/\.\./||
 204                         tstart
 205                         s|/*$||
 206                 ')
 207         if test -z "$force"
 208         then
 209                 git ls-files --error-unmatch "$sm_path" > /dev/null 2>&1 &&
 210                 die "$(eval_gettext "'\$sm_path' already exists in the index")"
 211         else
 212                 git ls-files -s "$sm_path" | sane_grep -v "^160000" > /dev/null 2>&1 &&
 213                 die "$(eval_gettext "'\$sm_path' already exists in the index and is not a submodule")"
 214         fi
 215
 216         if test -z "$force" &&
 217                 ! git add --dry-run --ignore-missing --no-warn-embedded-repo "$sm_path" > /dev/null 2>&1
 218         then
 219                 eval_gettextln "The following path is ignored by one of your .gitignore files:
 220 \$sm_path
 221 Use -f if you really want to add it." >&2
 222                 exit 1
 223         fi
 224
 225         if test -n "$custom_name"
 226         then
 227                 sm_name="$custom_name"
 228         else
 229                 sm_name="$sm_path"
 230         fi
 231
 232         # perhaps the path exists and is already a git repo, else clone it
 233         if test -e "$sm_path"
 234         then
 235                 if test -d "$sm_path"/.git || test -f "$sm_path"/.git
 236                 then
 237                         eval_gettextln "Adding existing repo at '\$sm_path' to the index"
 238                 else
 239                         die "$(eval_gettext "'\$sm_path' already exists and is not a valid git repo")"
 240                 fi
 241
 242         else
 243                 if test -d ".git/modules/$sm_name"
 244                 then
 245                         if test -z "$force"
 246                         then
 247                                 eval_gettextln >&2 "A git directory for '\$sm_name' is found locally with remote(s):"
 248                                 GIT_DIR=".git/modules/$sm_name" GIT_WORK_TREE=. git remote -v | grep '(fetch)' | sed -e s,^,"  ", -e s,' (fetch)',, >&2
 249                                 die "$(eval_gettextln "\
 250 If you want to reuse this local git directory instead of cloning again from
 251   \$realrepo
 252 use the '--force' option. If the local git directory is not the correct repo
 253 or you are unsure what this means choose another name with the '--name' option.")"
 254                         else
 255                                 eval_gettextln "Reactivating local git directory for submodule '\$sm_name'."
 256                         fi
 257                 fi
 258                 git submodule--helper clone ${GIT_QUIET:+--quiet} --prefix "$wt_prefix" --path "$sm_path" --name "$sm_name" --url "$realrepo" ${reference:+"$reference"} ${depth:+"$depth"} || exit
 259                 (
 260                         sanitize_submodule_env
 261                         cd "$sm_path" &&
 262                         # ash fails to wordsplit ${branch:+-b "$branch"...}
 263                         case "$branch" in
 264                         '') git checkout -f -q ;;
 265                         ?*) git checkout -f -q -B "$branch" "origin/$branch" ;;
 266                         esac
 267                 ) || die "$(eval_gettext "Unable to checkout submodule '\$sm_path'")"
 268         fi
 269         git config submodule."$sm_name".url "$realrepo"
 270
 271         git add --no-warn-embedded-repo $force "$sm_path" ||
 272         die "$(eval_gettext "Failed to add submodule '\$sm_path'")"
 273
 274         git config -f .gitmodules submodule."$sm_name".path "$sm_path" &&
 275         git config -f .gitmodules submodule."$sm_name".url "$repo" &&
 276         if test -n "$branch"
 277         then
 278                 git config -f .gitmodules submodule."$sm_name".branch "$branch"
 279         fi &&
 280         git add --force .gitmodules ||
 281         die "$(eval_gettext "Failed to register submodule '\$sm_path'")"
 282
 283         # NEEDSWORK: In a multi-working-tree world, this needs to be
 284         # set in the per-worktree config.
 285         if git config --get submodule.active >/dev/null
 286         then
 287                 # If the submodule being adding isn't already covered by the
 288                 # current configured pathspec, set the submodule's active flag
 289                 if ! git submodule--helper is-active "$sm_path"
 290                 then
 291                         git config submodule."$sm_name".active "true"
 292                 fi
 293         else
 294                 git config submodule."$sm_name".active "true"
 295         fi
 296 }
 297
 298 #
 299 # Execute an arbitrary command sequence in each checked out
 300 # submodule
 301 #
 302 # $@ = command to execute
 303 #
 304 cmd_foreach()
 305 {
 306         # parse $args after "submodule ... foreach".
 307         while test $# -ne 0
 308         do
 309                 case "$1" in
 310                 -q|--quiet)
 311                         GIT_QUIET=1
 312                         ;;
 313                 --recursive)
 314                         recursive=1
 315                         ;;
 316                 -*)
 317                         usage
 318                         ;;
 319                 *)
 320                         break
 321                         ;;
 322                 esac
 323                 shift
 324         done
 325
 326         toplevel=$(pwd)
 327
 328         # dup stdin so that it can be restored when running the external
 329         # command in the subshell (and a recursive call to this function)
 330         exec 3<&0
 331
 332         {
 333                 git submodule--helper list --prefix "$wt_prefix" ||
 334                 echo "#unmatched" $?
 335         } |
 336         while read -r mode sha1 stage sm_path
 337         do
 338                 die_if_unmatched "$mode" "$sha1"
 339                 if test -e "$sm_path"/.git
 340                 then
 341                         displaypath=$(git submodule--helper relative-path "$prefix$sm_path" "$wt_prefix")
 342                         say "$(eval_gettext "Entering '\$displaypath'")"
 343                         name=$(git submodule--helper name "$sm_path")
 344                         (
 345                                 prefix="$prefix$sm_path/"
 346                                 sanitize_submodule_env
 347                                 cd "$sm_path" &&
 348                                 # we make $path available to scripts ...
 349                                 path=$sm_path &&
 350                                 if test $# -eq 1
 351                                 then
 352                                         eval "$1"
 353                                 else
 354                                         "$@"
 355                                 fi &&
 356                                 if test -n "$recursive"
 357                                 then
 358                                         cmd_foreach "--recursive" "$@"
 359                                 fi
 360                         ) <&3 3<&- ||
 361                         die "$(eval_gettext "Stopping at '\$displaypath'; script returned non-zero status.")"
 362                 fi
 363         done
 364 }
 365
 366 #
 367 # Register submodules in .git/config
 368 #
 369 # $@ = requested paths (default to all)
 370 #
 371 cmd_init()
 372 {
 373         # parse $args after "submodule ... init".
 374         while test $# -ne 0
 375         do
 376                 case "$1" in
 377                 -q|--quiet)
 378                         GIT_QUIET=1
 379                         ;;
 380                 --)
 381                         shift
 382                         break
 383                         ;;
 384                 -*)
 385                         usage
 386                         ;;
 387                 *)
 388                         break
 389                         ;;
 390                 esac
 391                 shift
 392         done
 393
 394         git ${wt_prefix:+-C "$wt_prefix"} ${prefix:+--super-prefix "$prefix"} submodule--helper init ${GIT_QUIET:+--quiet}  "$@"
 395 }
 396
 397 #
 398 # Unregister submodules from .git/config and remove their work tree
 399 #
 400 cmd_deinit()
 401 {
 402         # parse $args after "submodule ... deinit".
 403         deinit_all=
 404         while test $# -ne 0
 405         do
 406                 case "$1" in
 407                 -f|--force)
 408                         force=$1
 409                         ;;
 410                 -q|--quiet)
 411                         GIT_QUIET=1
 412                         ;;
 413                 --all)
 414                         deinit_all=t
 415                         ;;
 416                 --)
 417                         shift
 418                         break
 419                         ;;
 420                 -*)
 421                         usage
 422                         ;;
 423                 *)
 424                         break
 425                         ;;
 426                 esac
 427                 shift
 428         done
 429
 430         git ${wt_prefix:+-C "$wt_prefix"} submodule--helper deinit ${GIT_QUIET:+--quiet} ${prefix:+--prefix "$prefix"} ${force:+--force} ${deinit_all:+--all} "$@"
 431 }
 432
 433 is_tip_reachable () (
 434         sanitize_submodule_env &&
 435         cd "$1" &&
 436         rev=$(git rev-list -n 1 "$2" --not --all 2>/dev/null) &&
 437         test -z "$rev"
 438 )
 439
 440 fetch_in_submodule () (
 441         sanitize_submodule_env &&
 442         cd "$1" &&
 443         case "$2" in
 444         '')
 445                 git fetch ;;
 446         *)
 447                 shift
 448                 git fetch $(get_default_remote) "$@" ;;
 449         esac
 450 )
 451
 452 #
 453 # Update each submodule path to correct revision, using clone and checkout as needed
 454 #
 455 # $@ = requested paths (default to all)
 456 #
 457 cmd_update()
 458 {
 459         # parse $args after "submodule ... update".
 460         while test $# -ne 0
 461         do
 462                 case "$1" in
 463                 -q|--quiet)
 464                         GIT_QUIET=1
 465                         ;;
 466                 --progress)
 467                         progress="--progress"
 468                         ;;
 469                 -i|--init)
 470                         init=1
 471                         ;;
 472                 --remote)
 473                         remote=1
 474                         ;;
 475                 -N|--no-fetch)
 476                         nofetch=1
 477                         ;;
 478                 -f|--force)
 479                         force=$1
 480                         ;;
 481                 -r|--rebase)
 482                         update="rebase"
 483                         ;;
 484                 --reference)
 485                         case "$2" in '') usage ;; esac
 486                         reference="--reference=$2"
 487                         shift
 488                         ;;
 489                 --reference=*)
 490                         reference="$1"
 491                         ;;
 492                 -m|--merge)
 493                         update="merge"
 494                         ;;
 495                 --recursive)
 496                         recursive=1
 497                         ;;
 498                 --checkout)
 499                         update="checkout"
 500                         ;;
 501                 --recommend-shallow)
 502                         recommend_shallow="--recommend-shallow"
 503                         ;;
 504                 --no-recommend-shallow)
 505                         recommend_shallow="--no-recommend-shallow"
 506                         ;;
 507                 --depth)
 508                         case "$2" in '') usage ;; esac
 509                         depth="--depth=$2"
 510                         shift
 511                         ;;
 512                 --depth=*)
 513                         depth=$1
 514                         ;;
 515                 -j|--jobs)
 516                         case "$2" in '') usage ;; esac
 517                         jobs="--jobs=$2"
 518                         shift
 519                         ;;
 520                 --jobs=*)
 521                         jobs=$1
 522                         ;;
 523                 --)
 524                         shift
 525                         break
 526                         ;;
 527                 -*)
 528                         usage
 529                         ;;
 530                 *)
 531                         break
 532                         ;;
 533                 esac
 534                 shift
 535         done
 536
 537         if test -n "$init"
 538         then
 539                 cmd_init "--" "$@" || return
 540         fi
 541
 542         {
 543         git submodule--helper update-clone ${GIT_QUIET:+--quiet} \
 544                 ${progress:+"$progress"} \
 545                 ${wt_prefix:+--prefix "$wt_prefix"} \
 546                 ${prefix:+--recursive-prefix "$prefix"} \
 547                 ${update:+--update "$update"} \
 548                 ${reference:+"$reference"} \
 549                 ${depth:+--depth "$depth"} \
 550                 ${recommend_shallow:+"$recommend_shallow"} \
 551                 ${jobs:+$jobs} \
 552                 "$@" || echo "#unmatched" $?
 553         } | {
 554         err=
 555         while read -r mode sha1 stage just_cloned sm_path
 556         do
 557                 die_if_unmatched "$mode" "$sha1"
 558
 559                 name=$(git submodule--helper name "$sm_path") || exit
 560                 if ! test -z "$update"
 561                 then
 562                         update_module=$update
 563                 else
 564                         update_module=$(git config submodule."$name".update)
 565                         if test -z "$update_module"
 566                         then
 567                                 update_module="checkout"
 568                         fi
 569                 fi
 570
 571                 displaypath=$(git submodule--helper relative-path "$prefix$sm_path" "$wt_prefix")
 572
 573                 if test $just_cloned -eq 1
 574                 then
 575                         subsha1=
 576                         case "$update_module" in
 577                         merge | rebase | none)
 578                                 update_module=checkout ;;
 579                         esac
 580                 else
 581                         subsha1=$(sanitize_submodule_env; cd "$sm_path" &&
 582                                 git rev-parse --verify HEAD) ||
 583                         die "$(eval_gettext "Unable to find current revision in submodule path '\$displaypath'")"
 584                 fi
 585
 586                 if test -n "$remote"
 587                 then
 588                         branch=$(git submodule--helper remote-branch "$sm_path")
 589                         if test -z "$nofetch"
 590                         then
 591                                 # Fetch remote before determining tracking $sha1
 592                                 fetch_in_submodule "$sm_path" $depth ||
 593                                 die "$(eval_gettext "Unable to fetch in submodule path '\$sm_path'")"
 594                         fi
 595                         remote_name=$(sanitize_submodule_env; cd "$sm_path" && get_default_remote)
 596                         sha1=$(sanitize_submodule_env; cd "$sm_path" &&
 597                                 git rev-parse --verify "${remote_name}/${branch}") ||
 598                         die "$(eval_gettext "Unable to find current \${remote_name}/\${branch} revision in submodule path '\$sm_path'")"
 599                 fi
 600
 601                 if test "$subsha1" != "$sha1" || test -n "$force"
 602                 then
 603                         subforce=$force
 604                         # If we don't already have a -f flag and the submodule has never been checked out
 605                         if test -z "$subsha1" && test -z "$force"
 606                         then
 607                                 subforce="-f"
 608                         fi
 609
 610                         if test -z "$nofetch"
 611                         then
 612                                 # Run fetch only if $sha1 isn't present or it
 613                                 # is not reachable from a ref.
 614                                 is_tip_reachable "$sm_path" "$sha1" ||
 615                                 fetch_in_submodule "$sm_path" $depth ||
 616                                 die "$(eval_gettext "Unable to fetch in submodule path '\$displaypath'")"
 617
 618                                 # Now we tried the usual fetch, but $sha1 may
 619                                 # not be reachable from any of the refs
 620                                 is_tip_reachable "$sm_path" "$sha1" ||
 621                                 fetch_in_submodule "$sm_path" $depth "$sha1" ||
 622                                 die "$(eval_gettext "Fetched in submodule path '\$displaypath', but it did not contain \$sha1. Direct fetching of that commit failed.")"
 623                         fi
 624
 625                         must_die_on_failure=
 626                         case "$update_module" in
 627                         checkout)
 628                                 command="git checkout $subforce -q"
 629                                 die_msg="$(eval_gettext "Unable to checkout '\$sha1' in submodule path '\$displaypath'")"
 630                                 say_msg="$(eval_gettext "Submodule path '\$displaypath': checked out '\$sha1'")"
 631                                 ;;
 632                         rebase)
 633                                 command="git rebase"
 634                                 die_msg="$(eval_gettext "Unable to rebase '\$sha1' in submodule path '\$displaypath'")"
 635                                 say_msg="$(eval_gettext "Submodule path '\$displaypath': rebased into '\$sha1'")"
 636                                 must_die_on_failure=yes
 637                                 ;;
 638                         merge)
 639                                 command="git merge"
 640                                 die_msg="$(eval_gettext "Unable to merge '\$sha1' in submodule path '\$displaypath'")"
 641                                 say_msg="$(eval_gettext "Submodule path '\$displaypath': merged in '\$sha1'")"
 642                                 must_die_on_failure=yes
 643                                 ;;
 644                         !*)
 645                                 command="${update_module#!}"
 646                                 die_msg="$(eval_gettext "Execution of '\$command \$sha1' failed in submodule path '\$displaypath'")"
 647                                 say_msg="$(eval_gettext "Submodule path '\$displaypath': '\$command \$sha1'")"
 648                                 must_die_on_failure=yes
 649                                 ;;
 650                         *)
 651                                 die "$(eval_gettext "Invalid update mode '$update_module' for submodule '$name'")"
 652                         esac
 653
 654                         if (sanitize_submodule_env; cd "$sm_path" && $command "$sha1")
 655                         then
 656                                 say "$say_msg"
 657                         elif test -n "$must_die_on_failure"
 658                         then
 659                                 die_with_status 2 "$die_msg"
 660                         else
 661                                 err="${err};$die_msg"
 662                                 continue
 663                         fi
 664                 fi
 665
 666                 if test -n "$recursive"
 667                 then
 668                         (
 669                                 prefix=$(git submodule--helper relative-path "$prefix$sm_path/" "$wt_prefix")
 670                                 wt_prefix=
 671                                 sanitize_submodule_env
 672                                 cd "$sm_path" &&
 673                                 eval cmd_update
 674                         )
 675                         res=$?
 676                         if test $res -gt 0
 677                         then
 678                                 die_msg="$(eval_gettext "Failed to recurse into submodule path '\$displaypath'")"
 679                                 if test $res -ne 2
 680                                 then
 681                                         err="${err};$die_msg"
 682                                         continue
 683                                 else
 684                                         die_with_status $res "$die_msg"
 685                                 fi
 686                         fi
 687                 fi
 688         done
 689
 690         if test -n "$err"
 691         then
 692                 OIFS=$IFS
 693                 IFS=';'
 694                 for e in $err
 695                 do
 696                         if test -n "$e"
 697                         then
 698                                 echo >&2 "$e"
 699                         fi
 700                 done
 701                 IFS=$OIFS
 702                 exit 1
 703         fi
 704         }
 705 }
 706
 707 #
 708 # Show commit summary for submodules in index or working tree
 709 #
 710 # If '--cached' is given, show summary between index and given commit,
 711 # or between working tree and given commit
 712 #
 713 # $@ = [commit (default 'HEAD'),] requested paths (default all)
 714 #
 715 cmd_summary() {
 716         summary_limit=-1
 717         for_status=
 718         diff_cmd=diff-index
 719
 720         # parse $args after "submodule ... summary".
 721         while test $# -ne 0
 722         do
 723                 case "$1" in
 724                 --cached)
 725                         cached="$1"
 726                         ;;
 727                 --files)
 728                         files="$1"
 729                         ;;
 730                 --for-status)
 731                         for_status="$1"
 732                         ;;
 733                 -n|--summary-limit)
 734                         summary_limit="$2"
 735                         isnumber "$summary_limit" || usage
 736                         shift
 737                         ;;
 738                 --summary-limit=*)
 739                         summary_limit="${1#--summary-limit=}"
 740                         isnumber "$summary_limit" || usage
 741                         ;;
 742                 --)
 743                         shift
 744                         break
 745                         ;;
 746                 -*)
 747                         usage
 748                         ;;
 749                 *)
 750                         break
 751                         ;;
 752                 esac
 753                 shift
 754         done
 755
 756         test $summary_limit = 0 && return
 757
 758         if rev=$(git rev-parse -q --verify --default HEAD ${1+"$1"})
 759         then
 760                 head=$rev
 761                 test $# = 0 || shift
 762         elif test -z "$1" || test "$1" = "HEAD"
 763         then
 764                 # before the first commit: compare with an empty tree
 765                 head=$(git hash-object -w -t tree --stdin </dev/null)
 766                 test -z "$1" || shift
 767         else
 768                 head="HEAD"
 769         fi
 770
 771         if [ -n "$files" ]
 772         then
 773                 test -n "$cached" &&
 774                 die "$(gettext "The --cached option cannot be used with the --files option")"
 775                 diff_cmd=diff-files
 776                 head=
 777         fi
 778
 779         cd_to_toplevel
 780         eval "set $(git rev-parse --sq --prefix "$wt_prefix" -- "$@")"
 781         # Get modified modules cared by user
 782         modules=$(git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- "$@" |
 783                 sane_egrep '^:([0-7]* )?160000' |
 784                 while read -r mod_src mod_dst sha1_src sha1_dst status sm_path
 785                 do
 786                         # Always show modules deleted or type-changed (blob<->module)
 787                         if test "$status" = D || test "$status" = T
 788                         then
 789                                 printf '%s\n' "$sm_path"
 790                                 continue
 791                         fi
 792                         # Respect the ignore setting for --for-status.
 793                         if test -n "$for_status"
 794                         then
 795                                 name=$(git submodule--helper name "$sm_path")
 796                                 ignore_config=$(get_submodule_config "$name" ignore none)
 797                                 test $status != A && test $ignore_config = all && continue
 798                         fi
 799                         # Also show added or modified modules which are checked out
 800                         GIT_DIR="$sm_path/.git" git rev-parse --git-dir >/dev/null 2>&1 &&
 801                         printf '%s\n' "$sm_path"
 802                 done
 803         )
 804
 805         test -z "$modules" && return
 806
 807         git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- $modules |
 808         sane_egrep '^:([0-7]* )?160000' |
 809         cut -c2- |
 810         while read -r mod_src mod_dst sha1_src sha1_dst status name
 811         do
 812                 if test -z "$cached" &&
 813                         test $sha1_dst = 0000000000000000000000000000000000000000
 814                 then
 815                         case "$mod_dst" in
 816                         160000)
 817                                 sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
 818                                 ;;
 819                         100644 | 100755 | 120000)
 820                                 sha1_dst=$(git hash-object $name)
 821                                 ;;
 822                         000000)
 823                                 ;; # removed
 824                         *)
 825                                 # unexpected type
 826                                 eval_gettextln "unexpected mode \$mod_dst" >&2
 827                                 continue ;;
 828                         esac
 829                 fi
 830                 missing_src=
 831                 missing_dst=
 832
 833                 test $mod_src = 160000 &&
 834                 ! GIT_DIR="$name/.git" git rev-parse -q --verify $sha1_src^0 >/dev/null &&
 835                 missing_src=t
 836
 837                 test $mod_dst = 160000 &&
 838                 ! GIT_DIR="$name/.git" git rev-parse -q --verify $sha1_dst^0 >/dev/null &&
 839                 missing_dst=t
 840
 841                 display_name=$(git submodule--helper relative-path "$name" "$wt_prefix")
 842
 843                 total_commits=
 844                 case "$missing_src,$missing_dst" in
 845                 t,)
 846                         errmsg="$(eval_gettext "  Warn: \$display_name doesn't contain commit \$sha1_src")"
 847                         ;;
 848                 ,t)
 849                         errmsg="$(eval_gettext "  Warn: \$display_name doesn't contain commit \$sha1_dst")"
 850                         ;;
 851                 t,t)
 852                         errmsg="$(eval_gettext "  Warn: \$display_name doesn't contain commits \$sha1_src and \$sha1_dst")"
 853                         ;;
 854                 *)
 855                         errmsg=
 856                         total_commits=$(
 857                         if test $mod_src = 160000 && test $mod_dst = 160000
 858                         then
 859                                 range="$sha1_src...$sha1_dst"
 860                         elif test $mod_src = 160000
 861                         then
 862                                 range=$sha1_src
 863                         else
 864                                 range=$sha1_dst
 865                         fi
 866                         GIT_DIR="$name/.git" \
 867                         git rev-list --first-parent $range -- | wc -l
 868                         )
 869                         total_commits=" ($(($total_commits + 0)))"
 870                         ;;
 871                 esac
 872
 873                 sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
 874                 sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
 875                 if test $status = T
 876                 then
 877                         blob="$(gettext "blob")"
 878                         submodule="$(gettext "submodule")"
 879                         if test $mod_dst = 160000
 880                         then
 881                                 echo "* $display_name $sha1_abbr_src($blob)->$sha1_abbr_dst($submodule)$total_commits:"
 882                         else
 883                                 echo "* $display_name $sha1_abbr_src($submodule)->$sha1_abbr_dst($blob)$total_commits:"
 884                         fi
 885                 else
 886                         echo "* $display_name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
 887                 fi
 888                 if test -n "$errmsg"
 889                 then
 890                         # Don't give error msg for modification whose dst is not submodule
 891                         # i.e. deleted or changed to blob
 892                         test $mod_dst = 160000 && echo "$errmsg"
 893                 else
 894                         if test $mod_src = 160000 && test $mod_dst = 160000
 895                         then
 896                                 limit=
 897                                 test $summary_limit -gt 0 && limit="-$summary_limit"
 898                                 GIT_DIR="$name/.git" \
 899                                 git log $limit --pretty='format:  %m %s' \
 900                                 --first-parent $sha1_src...$sha1_dst
 901                         elif test $mod_dst = 160000
 902                         then
 903                                 GIT_DIR="$name/.git" \
 904                                 git log --pretty='format:  > %s' -1 $sha1_dst
 905                         else
 906                                 GIT_DIR="$name/.git" \
 907                                 git log --pretty='format:  < %s' -1 $sha1_src
 908                         fi
 909                         echo
 910                 fi
 911                 echo
 912         done
 913 }
 914 #
 915 # List all submodules, prefixed with:
 916 #  - submodule not initialized
 917 #  + different revision checked out
 918 #
 919 # If --cached was specified the revision in the index will be printed
 920 # instead of the currently checked out revision.
 921 #
 922 # $@ = requested paths (default to all)
 923 #
 924 cmd_status()
 925 {
 926         # parse $args after "submodule ... status".
 927         while test $# -ne 0
 928         do
 929                 case "$1" in
 930                 -q|--quiet)
 931                         GIT_QUIET=1
 932                         ;;
 933                 --cached)
 934                         cached=1
 935                         ;;
 936                 --recursive)
 937                         recursive=1
 938                         ;;
 939                 --)
 940                         shift
 941                         break
 942                         ;;
 943                 -*)
 944                         usage
 945                         ;;
 946                 *)
 947                         break
 948                         ;;
 949                 esac
 950                 shift
 951         done
 952
 953         git ${wt_prefix:+-C "$wt_prefix"} ${prefix:+--super-prefix "$prefix"} submodule--helper status ${GIT_QUIET:+--quiet} ${cached:+--cached} ${recursive:+--recursive} "$@"
 954 }
 955 #
 956 # Sync remote urls for submodules
 957 # This makes the value for remote.$remote.url match the value
 958 # specified in .gitmodules.
 959 #
 960 cmd_sync()
 961 {
 962         while test $# -ne 0
 963         do
 964                 case "$1" in
 965                 -q|--quiet)
 966                         GIT_QUIET=1
 967                         shift
 968                         ;;
 969                 --recursive)
 970                         recursive=1
 971                         shift
 972                         ;;
 973                 --)
 974                         shift
 975                         break
 976                         ;;
 977                 -*)
 978                         usage
 979                         ;;
 980                 *)
 981                         break
 982                         ;;
 983                 esac
 984         done
 985
 986         git ${wt_prefix:+-C "$wt_prefix"} ${prefix:+--super-prefix "$prefix"} submodule--helper sync ${GIT_QUIET:+--quiet} ${recursive:+--recursive} "$@"
 987 }
 988
 989 cmd_absorbgitdirs()
 990 {
 991         git submodule--helper absorb-git-dirs --prefix "$wt_prefix" "$@"
 992 }
 993
 994 # This loop parses the command line arguments to find the
 995 # subcommand name to dispatch.  Parsing of the subcommand specific
 996 # options are primarily done by the subcommand implementations.
 997 # Subcommand specific options such as --branch and --cached are
 998 # parsed here as well, for backward compatibility.
 999
1000 while test $# != 0 && test -z "$command"
1001 do
1002         case "$1" in
1003         add | foreach | init | deinit | update | status | summary | sync | absorbgitdirs)
1004                 command=$1
1005                 ;;
1006         -q|--quiet)
1007                 GIT_QUIET=1
1008                 ;;
1009         -b|--branch)
1010                 case "$2" in
1011                 '')
1012                         usage
1013                         ;;
1014                 esac
1015                 branch="$2"; shift
1016                 ;;
1017         --cached)
1018                 cached="$1"
1019                 ;;
1020         --)
1021                 break
1022                 ;;
1023         -*)
1024                 usage
1025                 ;;
1026         *)
1027                 break
1028                 ;;
1029         esac
1030         shift
1031 done
1032
1033 # No command word defaults to "status"
1034 if test -z "$command"
1035 then
1036     if test $# = 0
1037     then
1038         command=status
1039     else
1040         usage
1041     fi
1042 fi
1043
1044 # "-b branch" is accepted only by "add"
1045 if test -n "$branch" && test "$command" != add
1046 then
1047         usage
1048 fi
1049
1050 # "--cached" is accepted only by "status" and "summary"
1051 if test -n "$cached" && test "$command" != status && test "$command" != summary
1052 then
1053         usage
1054 fi
1055
1056 "cmd_$command" "$@"