git-submodule.sh

   1 #!/bin/sh
   2 #
   3 # git-submodules.sh: add, init, update or list git submodules
   4 #
   5 # Copyright (c) 2007 Lars Hjemli
   6
   7 USAGE="[--quiet] [--cached|--files] \
   8 [add [-b branch] <repo> <path>]|[status|init|update [-i|--init] [-N|--no-fetch] [--rebase|--merge]|summary [-n|--summary-limit <n>] [<commit>]] \
   9 [--] [<path>...]|[foreach <command>]|[sync [--] [<path>...]]"
  10 OPTIONS_SPEC=
  11 . git-sh-setup
  12 . git-parse-remote
  13 require_work_tree
  14
  15 command=
  16 branch=
  17 reference=
  18 cached=
  19 files=
  20 nofetch=
  21 update=
  22
  23 # Resolve relative url by appending to parent's url
  24 resolve_relative_url ()
  25 {
  26         remote=$(get_default_remote)
  27         remoteurl=$(git config "remote.$remote.url") ||
  28                 die "remote ($remote) does not have a url defined in .git/config"
  29         url="$1"
  30         remoteurl=${remoteurl%/}
  31         while test -n "$url"
  32         do
  33                 case "$url" in
  34                 ../*)
  35                         url="${url#../}"
  36                         remoteurl="${remoteurl%/*}"
  37                         ;;
  38                 ./*)
  39                         url="${url#./}"
  40                         ;;
  41                 *)
  42                         break;;
  43                 esac
  44         done
  45         echo "$remoteurl/${url%/}"
  46 }
  47
  48 #
  49 # Get submodule info for registered submodules
  50 # $@ = path to limit submodule list
  51 #
  52 module_list()
  53 {
  54         git ls-files --error-unmatch --stage -- "$@" | grep '^160000 '
  55 }
  56
  57 #
  58 # Map submodule path to submodule name
  59 #
  60 # $1 = path
  61 #
  62 module_name()
  63 {
  64         # Do we have "submodule.<something>.path = $1" defined in .gitmodules file?
  65         re=$(printf '%s\n' "$1" | sed -e 's/[].[^$\\*]/\\&/g')
  66         name=$( git config -f .gitmodules --get-regexp '^submodule\..*\.path$' |
  67                 sed -n -e 's|^submodule\.\(.*\)\.path '"$re"'$|\1|p' )
  68        test -z "$name" &&
  69        die "No submodule mapping found in .gitmodules for path '$path'"
  70        echo "$name"
  71 }
  72
  73 #
  74 # Clone a submodule
  75 #
  76 # Prior to calling, cmd_update checks that a possibly existing
  77 # path is not a git repository.
  78 # Likewise, cmd_add checks that path does not exist at all,
  79 # since it is the location of a new submodule.
  80 #
  81 module_clone()
  82 {
  83         path=$1
  84         url=$2
  85         reference="$3"
  86
  87         # If there already is a directory at the submodule path,
  88         # expect it to be empty (since that is the default checkout
  89         # action) and try to remove it.
  90         # Note: if $path is a symlink to a directory the test will
  91         # succeed but the rmdir will fail. We might want to fix this.
  92         if test -d "$path"
  93         then
  94                 rmdir "$path" 2>/dev/null ||
  95                 die "Directory '$path' exist, but is neither empty nor a git repository"
  96         fi
  97
  98         test -e "$path" &&
  99         die "A file already exist at path '$path'"
 100
 101         if test -n "$reference"
 102         then
 103                 git-clone "$reference" -n "$url" "$path"
 104         else
 105                 git-clone -n "$url" "$path"
 106         fi ||
 107         die "Clone of '$url' into submodule path '$path' failed"
 108 }
 109
 110 #
 111 # Add a new submodule to the working tree, .gitmodules and the index
 112 #
 113 # $@ = repo path
 114 #
 115 # optional branch is stored in global branch variable
 116 #
 117 cmd_add()
 118 {
 119         # parse $args after "submodule ... add".
 120         while test $# -ne 0
 121         do
 122                 case "$1" in
 123                 -b | --branch)
 124                         case "$2" in '') usage ;; esac
 125                         branch=$2
 126                         shift
 127                         ;;
 128                 -q|--quiet)
 129                         GIT_QUIET=1
 130                         ;;
 131                 --reference)
 132                         case "$2" in '') usage ;; esac
 133                         reference="--reference=$2"
 134                         shift
 135                         ;;
 136                 --reference=*)
 137                         reference="$1"
 138                         shift
 139                         ;;
 140                 --)
 141                         shift
 142                         break
 143                         ;;
 144                 -*)
 145                         usage
 146                         ;;
 147                 *)
 148                         break
 149                         ;;
 150                 esac
 151                 shift
 152         done
 153
 154         repo=$1
 155         path=$2
 156
 157         if test -z "$repo" -o -z "$path"; then
 158                 usage
 159         fi
 160
 161         # assure repo is absolute or relative to parent
 162         case "$repo" in
 163         ./*|../*)
 164                 # dereference source url relative to parent's url
 165                 realrepo=$(resolve_relative_url "$repo") || exit
 166                 ;;
 167         *:*|/*)
 168                 # absolute url
 169                 realrepo=$repo
 170                 ;;
 171         *)
 172                 die "repo URL: '$repo' must be absolute or begin with ./|../"
 173         ;;
 174         esac
 175
 176         # normalize path:
 177         # multiple //; leading ./; /./; /../; trailing /
 178         path=$(printf '%s/\n' "$path" |
 179                 sed -e '
 180                         s|//*|/|g
 181                         s|^\(\./\)*||
 182                         s|/\./|/|g
 183                         :start
 184                         s|\([^/]*\)/\.\./||
 185                         tstart
 186                         s|/*$||
 187                 ')
 188         git ls-files --error-unmatch "$path" > /dev/null 2>&1 &&
 189         die "'$path' already exists in the index"
 190
 191         # perhaps the path exists and is already a git repo, else clone it
 192         if test -e "$path"
 193         then
 194                 if test -d "$path"/.git -o -f "$path"/.git
 195                 then
 196                         echo "Adding existing repo at '$path' to the index"
 197                 else
 198                         die "'$path' already exists and is not a valid git repo"
 199                 fi
 200
 201                 case "$repo" in
 202                 ./*|../*)
 203                         url=$(resolve_relative_url "$repo") || exit
 204                     ;;
 205                 *)
 206                         url="$repo"
 207                         ;;
 208                 esac
 209                 git config submodule."$path".url "$url"
 210         else
 211
 212                 module_clone "$path" "$realrepo" "$reference" || exit
 213                 (
 214                         unset GIT_DIR
 215                         cd "$path" &&
 216                         # ash fails to wordsplit ${branch:+-b "$branch"...}
 217                         case "$branch" in
 218                         '') git checkout -f -q ;;
 219                         ?*) git checkout -f -q -b "$branch" "origin/$branch" ;;
 220                         esac
 221                 ) || die "Unable to checkout submodule '$path'"
 222         fi
 223
 224         git add "$path" ||
 225         die "Failed to add submodule '$path'"
 226
 227         git config -f .gitmodules submodule."$path".path "$path" &&
 228         git config -f .gitmodules submodule."$path".url "$repo" &&
 229         git add .gitmodules ||
 230         die "Failed to register submodule '$path'"
 231 }
 232
 233 #
 234 # Execute an arbitrary command sequence in each checked out
 235 # submodule
 236 #
 237 # $@ = command to execute
 238 #
 239 cmd_foreach()
 240 {
 241         module_list |
 242         while read mode sha1 stage path
 243         do
 244                 if test -e "$path"/.git
 245                 then
 246                         say "Entering '$path'"
 247                         (cd "$path" && eval "$@") ||
 248                         die "Stopping at '$path'; script returned non-zero status."
 249                 fi
 250         done
 251 }
 252
 253 #
 254 # Register submodules in .git/config
 255 #
 256 # $@ = requested paths (default to all)
 257 #
 258 cmd_init()
 259 {
 260         # parse $args after "submodule ... init".
 261         while test $# -ne 0
 262         do
 263                 case "$1" in
 264                 -q|--quiet)
 265                         GIT_QUIET=1
 266                         ;;
 267                 --)
 268                         shift
 269                         break
 270                         ;;
 271                 -*)
 272                         usage
 273                         ;;
 274                 *)
 275                         break
 276                         ;;
 277                 esac
 278                 shift
 279         done
 280
 281         module_list "$@" |
 282         while read mode sha1 stage path
 283         do
 284                 # Skip already registered paths
 285                 name=$(module_name "$path") || exit
 286                 url=$(git config submodule."$name".url)
 287                 test -z "$url" || continue
 288
 289                 url=$(git config -f .gitmodules submodule."$name".url)
 290                 test -z "$url" &&
 291                 die "No url found for submodule path '$path' in .gitmodules"
 292
 293                 # Possibly a url relative to parent
 294                 case "$url" in
 295                 ./*|../*)
 296                         url=$(resolve_relative_url "$url") || exit
 297                         ;;
 298                 esac
 299
 300                 git config submodule."$name".url "$url" ||
 301                 die "Failed to register url for submodule path '$path'"
 302
 303                 upd="$(git config -f .gitmodules submodule."$name".update)"
 304                 test -z "$upd" ||
 305                 git config submodule."$name".update "$upd" ||
 306                 die "Failed to register update mode for submodule path '$path'"
 307
 308                 say "Submodule '$name' ($url) registered for path '$path'"
 309         done
 310 }
 311
 312 #
 313 # Update each submodule path to correct revision, using clone and checkout as needed
 314 #
 315 # $@ = requested paths (default to all)
 316 #
 317 cmd_update()
 318 {
 319         # parse $args after "submodule ... update".
 320         while test $# -ne 0
 321         do
 322                 case "$1" in
 323                 -q|--quiet)
 324                         shift
 325                         GIT_QUIET=1
 326                         ;;
 327                 -i|--init)
 328                         init=1
 329                         shift
 330                         ;;
 331                 -N|--no-fetch)
 332                         shift
 333                         nofetch=1
 334                         ;;
 335                 -r|--rebase)
 336                         shift
 337                         update="rebase"
 338                         ;;
 339                 --reference)
 340                         case "$2" in '') usage ;; esac
 341                         reference="--reference=$2"
 342                         shift 2
 343                         ;;
 344                 --reference=*)
 345                         reference="$1"
 346                         shift
 347                         ;;
 348                 -m|--merge)
 349                         shift
 350                         update="merge"
 351                         ;;
 352                 --)
 353                         shift
 354                         break
 355                         ;;
 356                 -*)
 357                         usage
 358                         ;;
 359                 *)
 360                         break
 361                         ;;
 362                 esac
 363         done
 364
 365         if test -n "$init"
 366         then
 367                 cmd_init "--" "$@" || return
 368         fi
 369
 370         module_list "$@" |
 371         while read mode sha1 stage path
 372         do
 373                 name=$(module_name "$path") || exit
 374                 url=$(git config submodule."$name".url)
 375                 update_module=$(git config submodule."$name".update)
 376                 if test -z "$url"
 377                 then
 378                         # Only mention uninitialized submodules when its
 379                         # path have been specified
 380                         test "$#" != "0" &&
 381                         say "Submodule path '$path' not initialized" &&
 382                         say "Maybe you want to use 'update --init'?"
 383                         continue
 384                 fi
 385
 386                 if ! test -d "$path"/.git -o -f "$path"/.git
 387                 then
 388                         module_clone "$path" "$url" "$reference"|| exit
 389                         subsha1=
 390                 else
 391                         subsha1=$(unset GIT_DIR; cd "$path" &&
 392                                 git rev-parse --verify HEAD) ||
 393                         die "Unable to find current revision in submodule path '$path'"
 394                 fi
 395
 396                 if ! test -z "$update"
 397                 then
 398                         update_module=$update
 399                 fi
 400
 401                 if test "$subsha1" != "$sha1"
 402                 then
 403                         force=
 404                         if test -z "$subsha1"
 405                         then
 406                                 force="-f"
 407                         fi
 408
 409                         if test -z "$nofetch"
 410                         then
 411                                 (unset GIT_DIR; cd "$path" &&
 412                                         git-fetch) ||
 413                                 die "Unable to fetch in submodule path '$path'"
 414                         fi
 415
 416                         case "$update_module" in
 417                         rebase)
 418                                 command="git rebase"
 419                                 action="rebase"
 420                                 msg="rebased onto"
 421                                 ;;
 422                         merge)
 423                                 command="git merge"
 424                                 action="merge"
 425                                 msg="merged in"
 426                                 ;;
 427                         *)
 428                                 command="git checkout $force -q"
 429                                 action="checkout"
 430                                 msg="checked out"
 431                                 ;;
 432                         esac
 433
 434                         (unset GIT_DIR; cd "$path" && $command "$sha1") ||
 435                         die "Unable to $action '$sha1' in submodule path '$path'"
 436                         say "Submodule path '$path': $msg '$sha1'"
 437                 fi
 438         done
 439 }
 440
 441 set_name_rev () {
 442         revname=$( (
 443                 unset GIT_DIR
 444                 cd "$1" && {
 445                         git describe "$2" 2>/dev/null ||
 446                         git describe --tags "$2" 2>/dev/null ||
 447                         git describe --contains "$2" 2>/dev/null ||
 448                         git describe --all --always "$2"
 449                 }
 450         ) )
 451         test -z "$revname" || revname=" ($revname)"
 452 }
 453 #
 454 # Show commit summary for submodules in index or working tree
 455 #
 456 # If '--cached' is given, show summary between index and given commit,
 457 # or between working tree and given commit
 458 #
 459 # $@ = [commit (default 'HEAD'),] requested paths (default all)
 460 #
 461 cmd_summary() {
 462         summary_limit=-1
 463         for_status=
 464         diff_cmd=diff-index
 465
 466         # parse $args after "submodule ... summary".
 467         while test $# -ne 0
 468         do
 469                 case "$1" in
 470                 --cached)
 471                         cached="$1"
 472                         ;;
 473                 --files)
 474                         files="$1"
 475                         ;;
 476                 --for-status)
 477                         for_status="$1"
 478                         ;;
 479                 -n|--summary-limit)
 480                         if summary_limit=$(($2 + 0)) 2>/dev/null && test "$summary_limit" = "$2"
 481                         then
 482                                 :
 483                         else
 484                                 usage
 485                         fi
 486                         shift
 487                         ;;
 488                 --)
 489                         shift
 490                         break
 491                         ;;
 492                 -*)
 493                         usage
 494                         ;;
 495                 *)
 496                         break
 497                         ;;
 498                 esac
 499                 shift
 500         done
 501
 502         test $summary_limit = 0 && return
 503
 504         if rev=$(git rev-parse -q --verify "$1^0")
 505         then
 506                 head=$rev
 507                 shift
 508         else
 509                 head=HEAD
 510         fi
 511
 512         if [ -n "$files" ]
 513         then
 514                 test -n "$cached" &&
 515                 die "--cached cannot be used with --files"
 516                 diff_cmd=diff-files
 517                 head=
 518         fi
 519
 520         cd_to_toplevel
 521         # Get modified modules cared by user
 522         modules=$(git $diff_cmd $cached --raw $head -- "$@" |
 523                 egrep '^:([0-7]* )?160000' |
 524                 while read mod_src mod_dst sha1_src sha1_dst status name
 525                 do
 526                         # Always show modules deleted or type-changed (blob<->module)
 527                         test $status = D -o $status = T && echo "$name" && continue
 528                         # Also show added or modified modules which are checked out
 529                         GIT_DIR="$name/.git" git-rev-parse --git-dir >/dev/null 2>&1 &&
 530                         echo "$name"
 531                 done
 532         )
 533
 534         test -z "$modules" && return
 535
 536         git $diff_cmd $cached --raw $head -- $modules |
 537         egrep '^:([0-7]* )?160000' |
 538         cut -c2- |
 539         while read mod_src mod_dst sha1_src sha1_dst status name
 540         do
 541                 if test -z "$cached" &&
 542                         test $sha1_dst = 0000000000000000000000000000000000000000
 543                 then
 544                         case "$mod_dst" in
 545                         160000)
 546                                 sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
 547                                 ;;
 548                         100644 | 100755 | 120000)
 549                                 sha1_dst=$(git hash-object $name)
 550                                 ;;
 551                         000000)
 552                                 ;; # removed
 553                         *)
 554                                 # unexpected type
 555                                 echo >&2 "unexpected mode $mod_dst"
 556                                 continue ;;
 557                         esac
 558                 fi
 559                 missing_src=
 560                 missing_dst=
 561
 562                 test $mod_src = 160000 &&
 563                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_src^0 >/dev/null &&
 564                 missing_src=t
 565
 566                 test $mod_dst = 160000 &&
 567                 ! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_dst^0 >/dev/null &&
 568                 missing_dst=t
 569
 570                 total_commits=
 571                 case "$missing_src,$missing_dst" in
 572                 t,)
 573                         errmsg="  Warn: $name doesn't contain commit $sha1_src"
 574                         ;;
 575                 ,t)
 576                         errmsg="  Warn: $name doesn't contain commit $sha1_dst"
 577                         ;;
 578                 t,t)
 579                         errmsg="  Warn: $name doesn't contain commits $sha1_src and $sha1_dst"
 580                         ;;
 581                 *)
 582                         errmsg=
 583                         total_commits=$(
 584                         if test $mod_src = 160000 -a $mod_dst = 160000
 585                         then
 586                                 range="$sha1_src...$sha1_dst"
 587                         elif test $mod_src = 160000
 588                         then
 589                                 range=$sha1_src
 590                         else
 591                                 range=$sha1_dst
 592                         fi
 593                         GIT_DIR="$name/.git" \
 594                         git log --pretty=oneline --first-parent $range | wc -l
 595                         )
 596                         total_commits=" ($(($total_commits + 0)))"
 597                         ;;
 598                 esac
 599
 600                 sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
 601                 sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
 602                 if test $status = T
 603                 then
 604                         if test $mod_dst = 160000
 605                         then
 606                                 echo "* $name $sha1_abbr_src(blob)->$sha1_abbr_dst(submodule)$total_commits:"
 607                         else
 608                                 echo "* $name $sha1_abbr_src(submodule)->$sha1_abbr_dst(blob)$total_commits:"
 609                         fi
 610                 else
 611                         echo "* $name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
 612                 fi
 613                 if test -n "$errmsg"
 614                 then
 615                         # Don't give error msg for modification whose dst is not submodule
 616                         # i.e. deleted or changed to blob
 617                         test $mod_dst = 160000 && echo "$errmsg"
 618                 else
 619                         if test $mod_src = 160000 -a $mod_dst = 160000
 620                         then
 621                                 limit=
 622                                 test $summary_limit -gt 0 && limit="-$summary_limit"
 623                                 GIT_DIR="$name/.git" \
 624                                 git log $limit --pretty='format:  %m %s' \
 625                                 --first-parent $sha1_src...$sha1_dst
 626                         elif test $mod_dst = 160000
 627                         then
 628                                 GIT_DIR="$name/.git" \
 629                                 git log --pretty='format:  > %s' -1 $sha1_dst
 630                         else
 631                                 GIT_DIR="$name/.git" \
 632                                 git log --pretty='format:  < %s' -1 $sha1_src
 633                         fi
 634                         echo
 635                 fi
 636                 echo
 637         done |
 638         if test -n "$for_status"; then
 639                 echo "# Modified submodules:"
 640                 echo "#"
 641                 sed -e 's|^|# |' -e 's|^# $|#|'
 642         else
 643                 cat
 644         fi
 645 }
 646 #
 647 # List all submodules, prefixed with:
 648 #  - submodule not initialized
 649 #  + different revision checked out
 650 #
 651 # If --cached was specified the revision in the index will be printed
 652 # instead of the currently checked out revision.
 653 #
 654 # $@ = requested paths (default to all)
 655 #
 656 cmd_status()
 657 {
 658         # parse $args after "submodule ... status".
 659         while test $# -ne 0
 660         do
 661                 case "$1" in
 662                 -q|--quiet)
 663                         GIT_QUIET=1
 664                         ;;
 665                 --cached)
 666                         cached=1
 667                         ;;
 668                 --)
 669                         shift
 670                         break
 671                         ;;
 672                 -*)
 673                         usage
 674                         ;;
 675                 *)
 676                         break
 677                         ;;
 678                 esac
 679                 shift
 680         done
 681
 682         module_list "$@" |
 683         while read mode sha1 stage path
 684         do
 685                 name=$(module_name "$path") || exit
 686                 url=$(git config submodule."$name".url)
 687                 if test -z "$url" || ! test -d "$path"/.git -o -f "$path"/.git
 688                 then
 689                         say "-$sha1 $path"
 690                         continue;
 691                 fi
 692                 set_name_rev "$path" "$sha1"
 693                 if git diff-files --quiet -- "$path"
 694                 then
 695                         say " $sha1 $path$revname"
 696                 else
 697                         if test -z "$cached"
 698                         then
 699                                 sha1=$(unset GIT_DIR; cd "$path" && git rev-parse --verify HEAD)
 700                                 set_name_rev "$path" "$sha1"
 701                         fi
 702                         say "+$sha1 $path$revname"
 703                 fi
 704         done
 705 }
 706 #
 707 # Sync remote urls for submodules
 708 # This makes the value for remote.$remote.url match the value
 709 # specified in .gitmodules.
 710 #
 711 cmd_sync()
 712 {
 713         while test $# -ne 0
 714         do
 715                 case "$1" in
 716                 -q|--quiet)
 717                         GIT_QUIET=1
 718                         shift
 719                         ;;
 720                 --)
 721                         shift
 722                         break
 723                         ;;
 724                 -*)
 725                         usage
 726                         ;;
 727                 *)
 728                         break
 729                         ;;
 730                 esac
 731         done
 732         cd_to_toplevel
 733         module_list "$@" |
 734         while read mode sha1 stage path
 735         do
 736                 name=$(module_name "$path")
 737                 url=$(git config -f .gitmodules --get submodule."$name".url)
 738
 739                 # Possibly a url relative to parent
 740                 case "$url" in
 741                 ./*|../*)
 742                         url=$(resolve_relative_url "$url") || exit
 743                         ;;
 744                 esac
 745
 746                 if test -e "$path"/.git
 747                 then
 748                 (
 749                         unset GIT_DIR
 750                         cd "$path"
 751                         remote=$(get_default_remote)
 752                         say "Synchronizing submodule url for '$name'"
 753                         git config remote."$remote".url "$url"
 754                 )
 755                 fi
 756         done
 757 }
 758
 759 # This loop parses the command line arguments to find the
 760 # subcommand name to dispatch.  Parsing of the subcommand specific
 761 # options are primarily done by the subcommand implementations.
 762 # Subcommand specific options such as --branch and --cached are
 763 # parsed here as well, for backward compatibility.
 764
 765 while test $# != 0 && test -z "$command"
 766 do
 767         case "$1" in
 768         add | foreach | init | update | status | summary | sync)
 769                 command=$1
 770                 ;;
 771         -q|--quiet)
 772                 GIT_QUIET=1
 773                 ;;
 774         -b|--branch)
 775                 case "$2" in
 776                 '')
 777                         usage
 778                         ;;
 779                 esac
 780                 branch="$2"; shift
 781                 ;;
 782         --cached)
 783                 cached="$1"
 784                 ;;
 785         --)
 786                 break
 787                 ;;
 788         -*)
 789                 usage
 790                 ;;
 791         *)
 792                 break
 793                 ;;
 794         esac
 795         shift
 796 done
 797
 798 # No command word defaults to "status"
 799 test -n "$command" || command=status
 800
 801 # "-b branch" is accepted only by "add"
 802 if test -n "$branch" && test "$command" != add
 803 then
 804         usage
 805 fi
 806
 807 # "--cached" is accepted only by "status" and "summary"
 808 if test -n "$cached" && test "$command" != status -a "$command" != summary
 809 then
 810         usage
 811 fi
 812
 813 "cmd_$command" "$@"