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