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] [--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: $dashless [--quiet] sync [--recursive] [--] [<path>...]"
  16 OPTIONS_SPEC=
  17 SUBDIRECTORY_OK=Yes
  18 . git-sh-setup
  19 . git-sh-i18n
  20 . git-parse-remote
  21 require_work_tree
  22 wt_prefix=$(git rev-parse --show-prefix)
  23 cd_to_toplevel
  24
  25 # Restrict ourselves to a vanilla subset of protocols; the URLs
  26 # we get are under control of a remote repository, and we do not
  27 # want them kicking off arbitrary git-remote-* programs.
  28 #
  29 # If the user has already specified a set of allowed protocols,
  30 # we assume they know what they're doing and use that instead.
  31 : ${GIT_ALLOW_PROTOCOL=file:git:http:https:ssh}
  32 export GIT_ALLOW_PROTOCOL
  33
  34 command=
  35 branch=
  36 force=
  37 reference=
  38 cached=
  39 recursive=
  40 init=
  41 files=
  42 remote=
  43 nofetch=
  44 update=
  45 prefix=
  46 custom_name=
  47 depth=
  48
  49 # The function takes at most 2 arguments. The first argument is the
  50 # URL that navigates to the submodule origin repo. When relative, this URL
  51 # is relative to the superproject origin URL repo. The second up_path
  52 # argument, if specified, is the relative path that navigates
  53 # from the submodule working tree to the superproject working tree.
  54 #
  55 # The output of the function is the origin URL of the submodule.
  56 #
  57 # The output will either be an absolute URL or filesystem path (if the
  58 # superproject origin URL is an absolute URL or filesystem path,
  59 # respectively) or a relative file system path (if the superproject
  60 # origin URL is a relative file system path).
  61 #
  62 # When the output is a relative file system path, the path is either
  63 # relative to the submodule working tree, if up_path is specified, or to
  64 # the superproject working tree otherwise.
  65 resolve_relative_url ()
  66 {
  67         remote=$(get_default_remote)
  68         remoteurl=$(git config "remote.$remote.url") ||
  69                 remoteurl=$(pwd) # the repository is its own authoritative upstream
  70         url="$1"
  71         remoteurl=${remoteurl%/}
  72         sep=/
  73         up_path="$2"
  74
  75         case "$remoteurl" in
  76         *:*|/*)
  77                 is_relative=
  78                 ;;
  79         ./*|../*)
  80                 is_relative=t
  81                 ;;
  82         *)
  83                 is_relative=t
  84                 remoteurl="./$remoteurl"
  85                 ;;
  86         esac
  87
  88         while test -n "$url"
  89         do
  90                 case "$url" in
  91                 ../*)
  92                         url="${url#../}"
  93                         case "$remoteurl" in
  94                         */*)
  95                                 remoteurl="${remoteurl%/*}"
  96                                 ;;
  97                         *:*)
  98                                 remoteurl="${remoteurl%:*}"
  99                                 sep=:
 100                                 ;;
 101                         *)
 102                                 if test -z "$is_relative" || test "." = "$remoteurl"
 103                                 then
 104                                         die "$(eval_gettext "cannot strip one component off url '\$remoteurl'")"
 105                                 else
 106                                         remoteurl=.
 107                                 fi
 108                                 ;;
 109                         esac
 110                         ;;
 111                 ./*)
 112                         url="${url#./}"
 113                         ;;
 114                 *)
 115                         break;;
 116                 esac
 117         done
 118         remoteurl="$remoteurl$sep${url%/}"
 119         echo "${is_relative:+${up_path}}${remoteurl#./}"
 120 }
 121
 122 # Resolve a path to be relative to another path.  This is intended for
 123 # converting submodule paths when git-submodule is run in a subdirectory
 124 # and only handles paths where the directory separator is '/'.
 125 #
 126 # The output is the first argument as a path relative to the second argument,
 127 # which defaults to $wt_prefix if it is omitted.
 128 relative_path ()
 129 {
 130         local target curdir result
 131         target=$1
 132         curdir=${2-$wt_prefix}
 133         curdir=${curdir%/}
 134         result=
 135
 136         while test -n "$curdir"
 137         do
 138                 case "$target" in
 139                 "$curdir/"*)
 140                         target=${target#"$curdir"/}
 141                         break
 142                         ;;
 143                 esac
 144
 145                 result="${result}../"
 146                 if test "$curdir" = "${curdir%/*}"
 147                 then
 148                         curdir=
 149                 else
 150                         curdir="${curdir%/*}"
 151                 fi
 152         done
 153
 154         echo "$result$target"
 155 }
 156
 157 die_if_unmatched ()
 158 {
 159         if test "$1" = "#unmatched"
 160         then
 161                 exit 1
 162         fi
 163 }
 164
 165 #
 166 # Print a submodule configuration setting
 167 #
 168 # $1 = submodule name
 169 # $2 = option name
 170 # $3 = default value
 171 #
 172 # Checks in the usual git-config places first (for overrides),
 173 # otherwise it falls back on .gitmodules.  This allows you to
 174 # distribute project-wide defaults in .gitmodules, while still
 175 # customizing individual repositories if necessary.  If the option is
 176 # not in .gitmodules either, print a default value.
 177 #
 178 get_submodule_config () {
 179         name="$1"
 180         option="$2"
 181         default="$3"
 182         value=$(git config submodule."$name"."$option")
 183         if test -z "$value"
 184         then
 185                 value=$(git config -f .gitmodules submodule."$name"."$option")
 186         fi
 187         printf '%s' "${value:-$default}"
 188 }
 189
 190 isnumber()
 191 {
 192         n=$(($1 + 0)) 2>/dev/null && test "$n" = "$1"
 193 }
 194
 195 #
 196 # Add a new submodule to the working tree, .gitmodules and the index
 197 #
 198 # $@ = repo path
 199 #
 200 # optional branch is stored in global branch variable
 201 #
 202 cmd_add()
 203 {
 204         # parse $args after "submodule ... add".
 205         reference_path=
 206         while test $# -ne 0
 207         do
 208                 case "$1" in
 209                 -b | --branch)
 210                         case "$2" in '') usage ;; esac
 211                         branch=$2
 212                         shift
 213                         ;;
 214                 -f | --force)
 215                         force=$1
 216                         ;;
 217                 -q|--quiet)
 218                         GIT_QUIET=1
 219                         ;;
 220                 --reference)
 221                         case "$2" in '') usage ;; esac
 222                         reference_path=$2
 223                         shift
 224                         ;;
 225                 --reference=*)
 226                         reference_path="${1#--reference=}"
 227                         ;;
 228                 --name)
 229                         case "$2" in '') usage ;; esac
 230                         custom_name=$2
 231                         shift
 232                         ;;
 233                 --depth)
 234                         case "$2" in '') usage ;; esac
 235                         depth="--depth=$2"
 236                         shift
 237                         ;;
 238                 --depth=*)
 239                         depth=$1
 240                         ;;
 241                 --)
 242                         shift
 243                         break
 244                         ;;
 245                 -*)
 246                         usage
 247                         ;;
 248                 *)
 249                         break
 250                         ;;
 251                 esac
 252                 shift
 253         done
 254
 255         if test -n "$reference_path"
 256         then
 257                 is_absolute_path "$reference_path" ||
 258                 reference_path="$wt_prefix$reference_path"
 259
 260                 reference="--reference=$reference_path"
 261         fi
 262
 263         repo=$1
 264         sm_path=$2
 265
 266         if test -z "$sm_path"; then
 267                 sm_path=$(printf '%s\n' "$repo" |
 268                         sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
 269         fi
 270
 271         if test -z "$repo" || test -z "$sm_path"; then
 272                 usage
 273         fi
 274
 275         is_absolute_path "$sm_path" || sm_path="$wt_prefix$sm_path"
 276
 277         # assure repo is absolute or relative to parent
 278         case "$repo" in
 279         ./*|../*)
 280                 test -z "$wt_prefix" ||
 281                 die "$(gettext "Relative path can only be used from the toplevel of the working tree")"
 282
 283                 # dereference source url relative to parent's url
 284                 realrepo=$(resolve_relative_url "$repo") || exit
 285                 ;;
 286         *:*|/*)
 287                 # absolute url
 288                 realrepo=$repo
 289                 ;;
 290         *)
 291                 die "$(eval_gettext "repo URL: '\$repo' must be absolute or begin with ./|../")"
 292         ;;
 293         esac
 294
 295         # normalize path:
 296         # multiple //; leading ./; /./; /../; trailing /
 297         sm_path=$(printf '%s/\n' "$sm_path" |
 298                 sed -e '
 299                         s|//*|/|g
 300                         s|^\(\./\)*||
 301                         s|/\(\./\)*|/|g
 302                         :start
 303                         s|\([^/]*\)/\.\./||
 304                         tstart
 305                         s|/*$||
 306                 ')
 307         git ls-files --error-unmatch "$sm_path" > /dev/null 2>&1 &&
 308         die "$(eval_gettext "'\$sm_path' already exists in the index")"
 309
 310         if test -z "$force" && ! git add --dry-run --ignore-missing "$sm_path" > /dev/null 2>&1
 311         then
 312                 eval_gettextln "The following path is ignored by one of your .gitignore files:
 313 \$sm_path
 314 Use -f if you really want to add it." >&2
 315                 exit 1
 316         fi
 317
 318         if test -n "$custom_name"
 319         then
 320                 sm_name="$custom_name"
 321         else
 322                 sm_name="$sm_path"
 323         fi
 324
 325         # perhaps the path exists and is already a git repo, else clone it
 326         if test -e "$sm_path"
 327         then
 328                 if test -d "$sm_path"/.git || test -f "$sm_path"/.git
 329                 then
 330                         eval_gettextln "Adding existing repo at '\$sm_path' to the index"
 331                 else
 332                         die "$(eval_gettext "'\$sm_path' already exists and is not a valid git repo")"
 333                 fi
 334
 335         else
 336                 if test -d ".git/modules/$sm_name"
 337                 then
 338                         if test -z "$force"
 339                         then
 340                                 echo >&2 "$(eval_gettext "A git directory for '\$sm_name' is found locally with remote(s):")"
 341                                 GIT_DIR=".git/modules/$sm_name" GIT_WORK_TREE=. git remote -v | grep '(fetch)' | sed -e s,^,"  ", -e s,' (fetch)',, >&2
 342                                 echo >&2 "$(eval_gettext "If you want to reuse this local git directory instead of cloning again from")"
 343                                 echo >&2 "  $realrepo"
 344                                 echo >&2 "$(eval_gettext "use the '--force' option. If the local git directory is not the correct repo")"
 345                                 die "$(eval_gettext "or you are unsure what this means choose another name with the '--name' option.")"
 346                         else
 347                                 echo "$(eval_gettext "Reactivating local git directory for submodule '\$sm_name'.")"
 348                         fi
 349                 fi
 350                 git submodule--helper clone ${GIT_QUIET:+--quiet} --prefix "$wt_prefix" --path "$sm_path" --name "$sm_name" --url "$realrepo" "$reference" "$depth" || exit
 351                 (
 352                         clear_local_git_env
 353                         cd "$sm_path" &&
 354                         # ash fails to wordsplit ${branch:+-b "$branch"...}
 355                         case "$branch" in
 356                         '') git checkout -f -q ;;
 357                         ?*) git checkout -f -q -B "$branch" "origin/$branch" ;;
 358                         esac
 359                 ) || die "$(eval_gettext "Unable to checkout submodule '\$sm_path'")"
 360         fi
 361         git config submodule."$sm_name".url "$realrepo"
 362
 363         git add $force "$sm_path" ||
 364         die "$(eval_gettext "Failed to add submodule '\$sm_path'")"
 365
 366         git config -f .gitmodules submodule."$sm_name".path "$sm_path" &&
 367         git config -f .gitmodules submodule."$sm_name".url "$repo" &&
 368         if test -n "$branch"
 369         then
 370                 git config -f .gitmodules submodule."$sm_name".branch "$branch"
 371         fi &&
 372         git add --force .gitmodules ||
 373         die "$(eval_gettext "Failed to register submodule '\$sm_path'")"
 374 }
 375
 376 #
 377 # Execute an arbitrary command sequence in each checked out
 378 # submodule
 379 #
 380 # $@ = command to execute
 381 #
 382 cmd_foreach()
 383 {
 384         # parse $args after "submodule ... foreach".
 385         while test $# -ne 0
 386         do
 387                 case "$1" in
 388                 -q|--quiet)
 389                         GIT_QUIET=1
 390                         ;;
 391                 --recursive)
 392                         recursive=1
 393                         ;;
 394                 -*)
 395                         usage
 396                         ;;
 397                 *)
 398                         break
 399                         ;;
 400                 esac
 401                 shift
 402         done
 403
 404         toplevel=$(pwd)
 405
 406         # dup stdin so that it can be restored when running the external
 407         # command in the subshell (and a recursive call to this function)
 408         exec 3<&0
 409
 410         git submodule--helper list --prefix "$wt_prefix"|
 411         while read mode sha1 stage sm_path
 412         do
 413                 die_if_unmatched "$mode"
 414                 if test -e "$sm_path"/.git
 415                 then
 416                         displaypath=$(relative_path "$sm_path")
 417                         say "$(eval_gettext "Entering '\$prefix\$displaypath'")"
 418                         name=$(git submodule--helper name "$sm_path")
 419                         (
 420                                 prefix="$prefix$sm_path/"
 421                                 clear_local_git_env
 422                                 cd "$sm_path" &&
 423                                 sm_path=$(relative_path "$sm_path") &&
 424                                 # we make $path available to scripts ...
 425                                 path=$sm_path &&
 426                                 if test $# -eq 1
 427                                 then
 428                                         eval "$1"
 429                                 else
 430                                         "$@"
 431                                 fi &&
 432                                 if test -n "$recursive"
 433                                 then
 434                                         cmd_foreach "--recursive" "$@"
 435                                 fi
 436                         ) <&3 3<&- ||
 437                         die "$(eval_gettext "Stopping at '\$prefix\$displaypath'; script returned non-zero status.")"
 438                 fi
 439         done
 440 }
 441
 442 #
 443 # Register submodules in .git/config
 444 #
 445 # $@ = requested paths (default to all)
 446 #
 447 cmd_init()
 448 {
 449         # parse $args after "submodule ... init".
 450         while test $# -ne 0
 451         do
 452                 case "$1" in
 453                 -q|--quiet)
 454                         GIT_QUIET=1
 455                         ;;
 456                 --)
 457                         shift
 458                         break
 459                         ;;
 460                 -*)
 461                         usage
 462                         ;;
 463                 *)
 464                         break
 465                         ;;
 466                 esac
 467                 shift
 468         done
 469
 470         git submodule--helper list --prefix "$wt_prefix" "$@" |
 471         while read mode sha1 stage sm_path
 472         do
 473                 die_if_unmatched "$mode"
 474                 name=$(git submodule--helper name "$sm_path") || exit
 475
 476                 displaypath=$(relative_path "$sm_path")
 477
 478                 # Copy url setting when it is not set yet
 479                 if test -z "$(git config "submodule.$name.url")"
 480                 then
 481                         url=$(git config -f .gitmodules submodule."$name".url)
 482                         test -z "$url" &&
 483                         die "$(eval_gettext "No url found for submodule path '\$displaypath' in .gitmodules")"
 484
 485                         # Possibly a url relative to parent
 486                         case "$url" in
 487                         ./*|../*)
 488                                 url=$(resolve_relative_url "$url") || exit
 489                                 ;;
 490                         esac
 491                         git config submodule."$name".url "$url" ||
 492                         die "$(eval_gettext "Failed to register url for submodule path '\$displaypath'")"
 493
 494                         say "$(eval_gettext "Submodule '\$name' (\$url) registered for path '\$displaypath'")"
 495                 fi
 496
 497                 # Copy "update" setting when it is not set yet
 498                 if upd="$(git config -f .gitmodules submodule."$name".update)" &&
 499                    test -n "$upd" &&
 500                    test -z "$(git config submodule."$name".update)"
 501                 then
 502                         case "$upd" in
 503                         checkout | rebase | merge | none)
 504                                 ;; # known modes of updating
 505                         *)
 506                                 echo >&2 "warning: unknown update mode '$upd' suggested for submodule '$name'"
 507                                 upd=none
 508                                 ;;
 509                         esac
 510                         git config submodule."$name".update "$upd" ||
 511                         die "$(eval_gettext "Failed to register update mode for submodule path '\$displaypath'")"
 512                 fi
 513         done
 514 }
 515
 516 #
 517 # Unregister submodules from .git/config and remove their work tree
 518 #
 519 cmd_deinit()
 520 {
 521         # parse $args after "submodule ... deinit".
 522         deinit_all=
 523         while test $# -ne 0
 524         do
 525                 case "$1" in
 526                 -f|--force)
 527                         force=$1
 528                         ;;
 529                 -q|--quiet)
 530                         GIT_QUIET=1
 531                         ;;
 532                 --all)
 533                         deinit_all=t
 534                         ;;
 535                 --)
 536                         shift
 537                         break
 538                         ;;
 539                 -*)
 540                         usage
 541                         ;;
 542                 *)
 543                         break
 544                         ;;
 545                 esac
 546                 shift
 547         done
 548
 549         if test -n "$deinit_all" && test "$#" -ne 0
 550         then
 551                 echo >&2 "$(eval_gettext "pathspec and --all are incompatible")"
 552                 usage
 553         fi
 554         if test $# = 0 && test -z "$deinit_all"
 555         then
 556                 die "$(eval_gettext "Use '--all' if you really want to deinitialize all submodules")"
 557         fi
 558
 559         git submodule--helper list --prefix "$wt_prefix" "$@" |
 560         while read mode sha1 stage sm_path
 561         do
 562                 die_if_unmatched "$mode"
 563                 name=$(git submodule--helper name "$sm_path") || exit
 564
 565                 displaypath=$(relative_path "$sm_path")
 566
 567                 # Remove the submodule work tree (unless the user already did it)
 568                 if test -d "$sm_path"
 569                 then
 570                         # Protect submodules containing a .git directory
 571                         if test -d "$sm_path/.git"
 572                         then
 573                                 echo >&2 "$(eval_gettext "Submodule work tree '\$displaypath' contains a .git directory")"
 574                                 die "$(eval_gettext "(use 'rm -rf' if you really want to remove it including all of its history)")"
 575                         fi
 576
 577                         if test -z "$force"
 578                         then
 579                                 git rm -qn "$sm_path" ||
 580                                 die "$(eval_gettext "Submodule work tree '\$displaypath' contains local modifications; use '-f' to discard them")"
 581                         fi
 582                         rm -rf "$sm_path" &&
 583                         say "$(eval_gettext "Cleared directory '\$displaypath'")" ||
 584                         say "$(eval_gettext "Could not remove submodule work tree '\$displaypath'")"
 585                 fi
 586
 587                 mkdir "$sm_path" || say "$(eval_gettext "Could not create empty submodule directory '\$displaypath'")"
 588
 589                 # Remove the .git/config entries (unless the user already did it)
 590                 if test -n "$(git config --get-regexp submodule."$name\.")"
 591                 then
 592                         # Remove the whole section so we have a clean state when
 593                         # the user later decides to init this submodule again
 594                         url=$(git config submodule."$name".url)
 595                         git config --remove-section submodule."$name" 2>/dev/null &&
 596                         say "$(eval_gettext "Submodule '\$name' (\$url) unregistered for path '\$displaypath'")"
 597                 fi
 598         done
 599 }
 600
 601 is_tip_reachable () (
 602         clear_local_git_env
 603         cd "$1" &&
 604         rev=$(git rev-list -n 1 "$2" --not --all 2>/dev/null) &&
 605         test -z "$rev"
 606 )
 607
 608 fetch_in_submodule () (
 609         clear_local_git_env
 610         cd "$1" &&
 611         case "$2" in
 612         '')
 613                 git fetch ;;
 614         *)
 615                 git fetch $(get_default_remote) "$2" ;;
 616         esac
 617 )
 618
 619 #
 620 # Update each submodule path to correct revision, using clone and checkout as needed
 621 #
 622 # $@ = requested paths (default to all)
 623 #
 624 cmd_update()
 625 {
 626         # parse $args after "submodule ... update".
 627         while test $# -ne 0
 628         do
 629                 case "$1" in
 630                 -q|--quiet)
 631                         GIT_QUIET=1
 632                         ;;
 633                 -i|--init)
 634                         init=1
 635                         ;;
 636                 --remote)
 637                         remote=1
 638                         ;;
 639                 -N|--no-fetch)
 640                         nofetch=1
 641                         ;;
 642                 -f|--force)
 643                         force=$1
 644                         ;;
 645                 -r|--rebase)
 646                         update="rebase"
 647                         ;;
 648                 --reference)
 649                         case "$2" in '') usage ;; esac
 650                         reference="--reference=$2"
 651                         shift
 652                         ;;
 653                 --reference=*)
 654                         reference="$1"
 655                         ;;
 656                 -m|--merge)
 657                         update="merge"
 658                         ;;
 659                 --recursive)
 660                         recursive=1
 661                         ;;
 662                 --checkout)
 663                         update="checkout"
 664                         ;;
 665                 --depth)
 666                         case "$2" in '') usage ;; esac
 667                         depth="--depth=$2"
 668                         shift
 669                         ;;
 670                 --depth=*)
 671                         depth=$1
 672                         ;;
 673                 --)
 674                         shift
 675                         break
 676                         ;;
 677                 -*)
 678                         usage
 679                         ;;
 680                 *)
 681                         break
 682                         ;;
 683                 esac
 684                 shift
 685         done
 686
 687         if test -n "$init"
 688         then
 689                 cmd_init "--" "$@" || return
 690         fi
 691
 692         cloned_modules=
 693         git submodule--helper list --prefix "$wt_prefix" "$@" | {
 694         err=
 695         while read mode sha1 stage sm_path
 696         do
 697                 die_if_unmatched "$mode"
 698                 if test "$stage" = U
 699                 then
 700                         echo >&2 "Skipping unmerged submodule $prefix$sm_path"
 701                         continue
 702                 fi
 703                 name=$(git submodule--helper name "$sm_path") || exit
 704                 url=$(git config submodule."$name".url)
 705                 branch=$(get_submodule_config "$name" branch master)
 706                 if ! test -z "$update"
 707                 then
 708                         update_module=$update
 709                 else
 710                         update_module=$(git config submodule."$name".update)
 711                         if test -z "$update_module"
 712                         then
 713                                 update_module="checkout"
 714                         fi
 715                 fi
 716
 717                 displaypath=$(relative_path "$prefix$sm_path")
 718
 719                 if test "$update_module" = "none"
 720                 then
 721                         echo "Skipping submodule '$displaypath'"
 722                         continue
 723                 fi
 724
 725                 if test -z "$url"
 726                 then
 727                         # Only mention uninitialized submodules when its
 728                         # path have been specified
 729                         test "$#" != "0" &&
 730                         say "$(eval_gettext "Submodule path '\$displaypath' not initialized
 731 Maybe you want to use 'update --init'?")"
 732                         continue
 733                 fi
 734
 735                 if ! test -d "$sm_path"/.git && ! test -f "$sm_path"/.git
 736                 then
 737                         git submodule--helper clone ${GIT_QUIET:+--quiet} --prefix "$prefix" --path "$sm_path" --name "$name" --url "$url" "$reference" "$depth" || exit
 738                         cloned_modules="$cloned_modules;$name"
 739                         subsha1=
 740                 else
 741                         subsha1=$(clear_local_git_env; cd "$sm_path" &&
 742                                 git rev-parse --verify HEAD) ||
 743                         die "$(eval_gettext "Unable to find current revision in submodule path '\$displaypath'")"
 744                 fi
 745
 746                 if test -n "$remote"
 747                 then
 748                         if test -z "$nofetch"
 749                         then
 750                                 # Fetch remote before determining tracking $sha1
 751                                 (clear_local_git_env; cd "$sm_path" && git-fetch) ||
 752                                 die "$(eval_gettext "Unable to fetch in submodule path '\$sm_path'")"
 753                         fi
 754                         remote_name=$(clear_local_git_env; cd "$sm_path" && get_default_remote)
 755                         sha1=$(clear_local_git_env; cd "$sm_path" &&
 756                                 git rev-parse --verify "${remote_name}/${branch}") ||
 757                         die "$(eval_gettext "Unable to find current ${remote_name}/${branch} revision in submodule path '\$sm_path'")"
 758                 fi
 759
 760                 if test "$subsha1" != "$sha1" || test -n "$force"
 761                 then
 762                         subforce=$force
 763                         # If we don't already have a -f flag and the submodule has never been checked out
 764                         if test -z "$subsha1" && test -z "$force"
 765                         then
 766                                 subforce="-f"
 767                         fi
 768
 769                         if test -z "$nofetch"
 770                         then
 771                                 # Run fetch only if $sha1 isn't present or it
 772                                 # is not reachable from a ref.
 773                                 is_tip_reachable "$sm_path" "$sha1" ||
 774                                 fetch_in_submodule "$sm_path" ||
 775                                 die "$(eval_gettext "Unable to fetch in submodule path '\$displaypath'")"
 776
 777                                 # Now we tried the usual fetch, but $sha1 may
 778                                 # not be reachable from any of the refs
 779                                 is_tip_reachable "$sm_path" "$sha1" ||
 780                                 fetch_in_submodule "$sm_path" "$sha1" ||
 781                                 die "$(eval_gettext "Fetched in submodule path '\$displaypath', but it did not contain $sha1. Direct fetching of that commit failed.")"
 782                         fi
 783
 784                         # Is this something we just cloned?
 785                         case ";$cloned_modules;" in
 786                         *";$name;"*)
 787                                 # then there is no local change to integrate
 788                                 update_module=checkout ;;
 789                         esac
 790
 791                         must_die_on_failure=
 792                         case "$update_module" in
 793                         checkout)
 794                                 command="git checkout $subforce -q"
 795                                 die_msg="$(eval_gettext "Unable to checkout '\$sha1' in submodule path '\$displaypath'")"
 796                                 say_msg="$(eval_gettext "Submodule path '\$displaypath': checked out '\$sha1'")"
 797                                 ;;
 798                         rebase)
 799                                 command="git rebase"
 800                                 die_msg="$(eval_gettext "Unable to rebase '\$sha1' in submodule path '\$displaypath'")"
 801                                 say_msg="$(eval_gettext "Submodule path '\$displaypath': rebased into '\$sha1'")"
 802                                 must_die_on_failure=yes
 803                                 ;;
 804                         merge)
 805                                 command="git merge"
 806                                 die_msg="$(eval_gettext "Unable to merge '\$sha1' in submodule path '\$displaypath'")"
 807                                 say_msg="$(eval_gettext "Submodule path '\$displaypath': merged in '\$sha1'")"
 808                                 must_die_on_failure=yes
 809                                 ;;
 810                         !*)
 811                                 command="${update_module#!}"
 812                                 die_msg="$(eval_gettext "Execution of '\$command \$sha1' failed in submodule path '\$prefix\$sm_path'")"
 813                                 say_msg="$(eval_gettext "Submodule path '\$prefix\$sm_path': '\$command \$sha1'")"
 814                                 must_die_on_failure=yes
 815                                 ;;
 816                         *)
 817                                 die "$(eval_gettext "Invalid update mode '$update_module' for submodule '$name'")"
 818                         esac
 819
 820                         if (clear_local_git_env; cd "$sm_path" && $command "$sha1")
 821                         then
 822                                 say "$say_msg"
 823                         elif test -n "$must_die_on_failure"
 824                         then
 825                                 die_with_status 2 "$die_msg"
 826                         else
 827                                 err="${err};$die_msg"
 828                                 continue
 829                         fi
 830                 fi
 831
 832                 if test -n "$recursive"
 833                 then
 834                         (
 835                                 prefix="$prefix$sm_path/"
 836                                 clear_local_git_env
 837                                 cd "$sm_path" &&
 838                                 eval cmd_update
 839                         )
 840                         res=$?
 841                         if test $res -gt 0
 842                         then
 843                                 die_msg="$(eval_gettext "Failed to recurse into submodule path '\$displaypath'")"
 844                                 if test $res -eq 1
 845                                 then
 846                                         err="${err};$die_msg"
 847                                         continue
 848                                 else
 849                                         die_with_status $res "$die_msg"
 850                                 fi
 851                         fi
 852                 fi
 853         done
 854
 855         if test -n "$err"
 856         then
 857                 OIFS=$IFS
 858                 IFS=';'
 859                 for e in $err
 860                 do
 861                         if test -n "$e"
 862                         then
 863                                 echo >&2 "$e"
 864                         fi
 865                 done
 866                 IFS=$OIFS
 867                 exit 1
 868         fi
 869         }
 870 }
 871
 872 set_name_rev () {
 873         revname=$( (
 874                 clear_local_git_env
 875                 cd "$1" && {
 876                         git describe "$2" 2>/dev/null ||
 877                         git describe --tags "$2" 2>/dev/null ||
 878                         git describe --contains "$2" 2>/dev/null ||
 879                         git describe --all --always "$2"
 880                 }
 881         ) )
 882         test -z "$revname" || revname=" ($revname)"
 883 }
 884 #
 885 # Show commit summary for submodules in index or working tree
 886 #
 887 # If '--cached' is given, show summary between index and given commit,
 888 # or between working tree and given commit
 889 #
 890 # $@ = [commit (default 'HEAD'),] requested paths (default all)
 891 #
 892 cmd_summary() {
 893         summary_limit=-1
 894         for_status=
 895         diff_cmd=diff-index
 896
 897         # parse $args after "submodule ... summary".
 898         while test $# -ne 0
 899         do
 900                 case "$1" in
 901                 --cached)
 902                         cached="$1"
 903                         ;;
 904                 --files)
 905                         files="$1"
 906                         ;;
 907                 --for-status)
 908                         for_status="$1"
 909                         ;;
 910                 -n|--summary-limit)
 911                         summary_limit="$2"
 912                         isnumber "$summary_limit" || usage
 913                         shift
 914                         ;;
 915                 --summary-limit=*)
 916                         summary_limit="${1#--summary-limit=}"
 917                         isnumber "$summary_limit" || usage
 918                         ;;
 919                 --)
 920                         shift
 921                         break
 922                         ;;
 923                 -*)
 924                         usage
 925                         ;;
 926                 *)
 927                         break
 928                         ;;
 929                 esac
 930                 shift
 931         done
 932
 933         test $summary_limit = 0 && return
 934
 935         if rev=$(git rev-parse -q --verify --default HEAD ${1+"$1"})
 936         then
 937                 head=$rev
 938                 test $# = 0 || shift
 939         elif test -z "$1" || test "$1" = "HEAD"
 940         then
 941                 # before the first commit: compare with an empty tree
 942                 head=$(git hash-object -w -t tree --stdin </dev/null)
 943                 test -z "$1" || shift
 944         else
 945                 head="HEAD"
 946         fi
 947
 948         if [ -n "$files" ]
 949         then
 950                 test -n "$cached" &&
 951                 die "$(gettext "The --cached option cannot be used with the --files option")"
 952                 diff_cmd=diff-files
 953                 head=
 954         fi
 955
 956         cd_to_toplevel
 957         eval "set $(git rev-parse --sq --prefix "$wt_prefix" -- "$@")"
 958         # Get modified modules cared by user
 959         modules=$(git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- "$@" |
 960                 sane_egrep '^:([0-7]* )?160000' |
 961                 while read mod_src mod_dst sha1_src sha1_dst status sm_path
 962                 do
 963                         # Always show modules deleted or type-changed (blob<->module)
 964                         if test "$status" = D || test "$status" = T
 965                         then
 966                                 printf '%s\n' "$sm_path"
 967                                 continue
 968                         fi
 969                         # Respect the ignore setting for --for-status.
 970                         if test -n "$for_status"
 971                         then
 972                                 name=$(git submodule--helper name "$sm_path")
 973                                 ignore_config=$(get_submodule_config "$name" ignore none)
 974                                 test $status != A && test $ignore_config = all && continue
 975                         fi
 976                         # Also show added or modified modules which are checked out
 977                         GIT_DIR="$sm_path/.git" git-rev-parse --git-dir >/dev/null 2>&1 &&
 978                         printf '%s\n' "$sm_path"
 979                 done
 980         )
 981
 982         test -z "$modules" && return
 983
 984         git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- $modules |
 985         sane_egrep '^:([0-7]* )?160000' |
 986         cut -c2- |
 987         while read mod_src mod_dst sha1_src sha1_dst status name
 988         do
 989                 if test -z "$cached" &&
 990                         test $sha1_dst = 0000000000000000000000000000000000000000
 991                 then
 992                         case "$mod_dst" in
 993                         160000)
 994                                 sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
 995                                 ;;
 996                         100644 | 100755 | 120000)
 997                                 sha1_dst=$(git hash-object $name)
 998                                 ;;
 999                         000000)
1000                                 ;; # removed
1001                         *)
1002                                 # unexpected type
1003                                 eval_gettextln "unexpected mode \$mod_dst" >&2
1004                                 continue ;;
1005                         esac
1006                 fi
1007                 missing_src=
1008                 missing_dst=
1009
1010                 test $mod_src = 160000 &&
1011                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_src^0 >/dev/null &&
1012                 missing_src=t
1013
1014                 test $mod_dst = 160000 &&
1015                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_dst^0 >/dev/null &&
1016                 missing_dst=t
1017
1018                 display_name=$(relative_path "$name")
1019
1020                 total_commits=
1021                 case "$missing_src,$missing_dst" in
1022                 t,)
1023                         errmsg="$(eval_gettext "  Warn: \$display_name doesn't contain commit \$sha1_src")"
1024                         ;;
1025                 ,t)
1026                         errmsg="$(eval_gettext "  Warn: \$display_name doesn't contain commit \$sha1_dst")"
1027                         ;;
1028                 t,t)
1029                         errmsg="$(eval_gettext "  Warn: \$display_name doesn't contain commits \$sha1_src and \$sha1_dst")"
1030                         ;;
1031                 *)
1032                         errmsg=
1033                         total_commits=$(
1034                         if test $mod_src = 160000 && test $mod_dst = 160000
1035                         then
1036                                 range="$sha1_src...$sha1_dst"
1037                         elif test $mod_src = 160000
1038                         then
1039                                 range=$sha1_src
1040                         else
1041                                 range=$sha1_dst
1042                         fi
1043                         GIT_DIR="$name/.git" \
1044                         git rev-list --first-parent $range -- | wc -l
1045                         )
1046                         total_commits=" ($(($total_commits + 0)))"
1047                         ;;
1048                 esac
1049
1050                 sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
1051                 sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
1052                 if test $status = T
1053                 then
1054                         blob="$(gettext "blob")"
1055                         submodule="$(gettext "submodule")"
1056                         if test $mod_dst = 160000
1057                         then
1058                                 echo "* $display_name $sha1_abbr_src($blob)->$sha1_abbr_dst($submodule)$total_commits:"
1059                         else
1060                                 echo "* $display_name $sha1_abbr_src($submodule)->$sha1_abbr_dst($blob)$total_commits:"
1061                         fi
1062                 else
1063                         echo "* $display_name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
1064                 fi
1065                 if test -n "$errmsg"
1066                 then
1067                         # Don't give error msg for modification whose dst is not submodule
1068                         # i.e. deleted or changed to blob
1069                         test $mod_dst = 160000 && echo "$errmsg"
1070                 else
1071                         if test $mod_src = 160000 && test $mod_dst = 160000
1072                         then
1073                                 limit=
1074                                 test $summary_limit -gt 0 && limit="-$summary_limit"
1075                                 GIT_DIR="$name/.git" \
1076                                 git log $limit --pretty='format:  %m %s' \
1077                                 --first-parent $sha1_src...$sha1_dst
1078                         elif test $mod_dst = 160000
1079                         then
1080                                 GIT_DIR="$name/.git" \
1081                                 git log --pretty='format:  > %s' -1 $sha1_dst
1082                         else
1083                                 GIT_DIR="$name/.git" \
1084                                 git log --pretty='format:  < %s' -1 $sha1_src
1085                         fi
1086                         echo
1087                 fi
1088                 echo
1089         done
1090 }
1091 #
1092 # List all submodules, prefixed with:
1093 #  - submodule not initialized
1094 #  + different revision checked out
1095 #
1096 # If --cached was specified the revision in the index will be printed
1097 # instead of the currently checked out revision.
1098 #
1099 # $@ = requested paths (default to all)
1100 #
1101 cmd_status()
1102 {
1103         # parse $args after "submodule ... status".
1104         while test $# -ne 0
1105         do
1106                 case "$1" in
1107                 -q|--quiet)
1108                         GIT_QUIET=1
1109                         ;;
1110                 --cached)
1111                         cached=1
1112                         ;;
1113                 --recursive)
1114                         recursive=1
1115                         ;;
1116                 --)
1117                         shift
1118                         break
1119                         ;;
1120                 -*)
1121                         usage
1122                         ;;
1123                 *)
1124                         break
1125                         ;;
1126                 esac
1127                 shift
1128         done
1129
1130         git submodule--helper list --prefix "$wt_prefix" "$@" |
1131         while read mode sha1 stage sm_path
1132         do
1133                 die_if_unmatched "$mode"
1134                 name=$(git submodule--helper name "$sm_path") || exit
1135                 url=$(git config submodule."$name".url)
1136                 displaypath=$(relative_path "$prefix$sm_path")
1137                 if test "$stage" = U
1138                 then
1139                         say "U$sha1 $displaypath"
1140                         continue
1141                 fi
1142                 if test -z "$url" ||
1143                 {
1144                         ! test -d "$sm_path"/.git &&
1145                         ! test -f "$sm_path"/.git
1146                 }
1147                 then
1148                         say "-$sha1 $displaypath"
1149                         continue;
1150                 fi
1151                 if git diff-files --ignore-submodules=dirty --quiet -- "$sm_path"
1152                 then
1153                         set_name_rev "$sm_path" "$sha1"
1154                         say " $sha1 $displaypath$revname"
1155                 else
1156                         if test -z "$cached"
1157                         then
1158                                 sha1=$(clear_local_git_env; cd "$sm_path" && git rev-parse --verify HEAD)
1159                         fi
1160                         set_name_rev "$sm_path" "$sha1"
1161                         say "+$sha1 $displaypath$revname"
1162                 fi
1163
1164                 if test -n "$recursive"
1165                 then
1166                         (
1167                                 prefix="$displaypath/"
1168                                 clear_local_git_env
1169                                 cd "$sm_path" &&
1170                                 eval cmd_status
1171                         ) ||
1172                         die "$(eval_gettext "Failed to recurse into submodule path '\$sm_path'")"
1173                 fi
1174         done
1175 }
1176 #
1177 # Sync remote urls for submodules
1178 # This makes the value for remote.$remote.url match the value
1179 # specified in .gitmodules.
1180 #
1181 cmd_sync()
1182 {
1183         while test $# -ne 0
1184         do
1185                 case "$1" in
1186                 -q|--quiet)
1187                         GIT_QUIET=1
1188                         shift
1189                         ;;
1190                 --recursive)
1191                         recursive=1
1192                         shift
1193                         ;;
1194                 --)
1195                         shift
1196                         break
1197                         ;;
1198                 -*)
1199                         usage
1200                         ;;
1201                 *)
1202                         break
1203                         ;;
1204                 esac
1205         done
1206         cd_to_toplevel
1207         git submodule--helper list --prefix "$wt_prefix" "$@" |
1208         while read mode sha1 stage sm_path
1209         do
1210                 die_if_unmatched "$mode"
1211                 name=$(git submodule--helper name "$sm_path")
1212                 url=$(git config -f .gitmodules --get submodule."$name".url)
1213
1214                 # Possibly a url relative to parent
1215                 case "$url" in
1216                 ./*|../*)
1217                         # rewrite foo/bar as ../.. to find path from
1218                         # submodule work tree to superproject work tree
1219                         up_path="$(printf '%s\n' "$sm_path" | sed "s/[^/][^/]*/../g")" &&
1220                         # guarantee a trailing /
1221                         up_path=${up_path%/}/ &&
1222                         # path from submodule work tree to submodule origin repo
1223                         sub_origin_url=$(resolve_relative_url "$url" "$up_path") &&
1224                         # path from superproject work tree to submodule origin repo
1225                         super_config_url=$(resolve_relative_url "$url") || exit
1226                         ;;
1227                 *)
1228                         sub_origin_url="$url"
1229                         super_config_url="$url"
1230                         ;;
1231                 esac
1232
1233                 if git config "submodule.$name.url" >/dev/null 2>/dev/null
1234                 then
1235                         displaypath=$(relative_path "$prefix$sm_path")
1236                         say "$(eval_gettext "Synchronizing submodule url for '\$displaypath'")"
1237                         git config submodule."$name".url "$super_config_url"
1238
1239                         if test -e "$sm_path"/.git
1240                         then
1241                         (
1242                                 clear_local_git_env
1243                                 cd "$sm_path"
1244                                 remote=$(get_default_remote)
1245                                 git config remote."$remote".url "$sub_origin_url"
1246
1247                                 if test -n "$recursive"
1248                                 then
1249                                         prefix="$prefix$sm_path/"
1250                                         eval cmd_sync
1251                                 fi
1252                         )
1253                         fi
1254                 fi
1255         done
1256 }
1257
1258 # This loop parses the command line arguments to find the
1259 # subcommand name to dispatch.  Parsing of the subcommand specific
1260 # options are primarily done by the subcommand implementations.
1261 # Subcommand specific options such as --branch and --cached are
1262 # parsed here as well, for backward compatibility.
1263
1264 while test $# != 0 && test -z "$command"
1265 do
1266         case "$1" in
1267         add | foreach | init | deinit | update | status | summary | sync)
1268                 command=$1
1269                 ;;
1270         -q|--quiet)
1271                 GIT_QUIET=1
1272                 ;;
1273         -b|--branch)
1274                 case "$2" in
1275                 '')
1276                         usage
1277                         ;;
1278                 esac
1279                 branch="$2"; shift
1280                 ;;
1281         --cached)
1282                 cached="$1"
1283                 ;;
1284         --)
1285                 break
1286                 ;;
1287         -*)
1288                 usage
1289                 ;;
1290         *)
1291                 break
1292                 ;;
1293         esac
1294         shift
1295 done
1296
1297 # No command word defaults to "status"
1298 if test -z "$command"
1299 then
1300     if test $# = 0
1301     then
1302         command=status
1303     else
1304         usage
1305     fi
1306 fi
1307
1308 # "-b branch" is accepted only by "add"
1309 if test -n "$branch" && test "$command" != add
1310 then
1311         usage
1312 fi
1313
1314 # "--cached" is accepted only by "status" and "summary"
1315 if test -n "$cached" && test "$command" != status && test "$command" != summary
1316 then
1317         usage
1318 fi
1319
1320 "cmd_$command" "$@"