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