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