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]|status|init|update|summary [-n|--summary-limit <n>] [<commit>]] \
   9 [--] [<path>...]"
  10 OPTIONS_SPEC=
  11 . git-sh-setup
  12 require_work_tree
  13
  14 command=
  15 branch=
  16 quiet=
  17 cached=
  18
  19 #
  20 # print stuff on stdout unless -q was specified
  21 #
  22 say()
  23 {
  24         if test -z "$quiet"
  25         then
  26                 echo "$@"
  27         fi
  28 }
  29
  30 # NEEDSWORK: identical function exists in get_repo_base in clone.sh
  31 get_repo_base() {
  32         (
  33                 cd "`/bin/pwd`" &&
  34                 cd "$1" || cd "$1.git" &&
  35                 {
  36                         cd .git
  37                         pwd
  38                 }
  39         ) 2>/dev/null
  40 }
  41
  42 # Resolve relative url by appending to parent's url
  43 resolve_relative_url ()
  44 {
  45         branch="$(git symbolic-ref HEAD 2>/dev/null)"
  46         remote="$(git config branch.${branch#refs/heads/}.remote)"
  47         remote="${remote:-origin}"
  48         remoteurl="$(git config remote.$remote.url)" ||
  49                 die "remote ($remote) does not have a url in .git/config"
  50         url="$1"
  51         while test -n "$url"
  52         do
  53                 case "$url" in
  54                 ../*)
  55                         url="${url#../}"
  56                         remoteurl="${remoteurl%/*}"
  57                         ;;
  58                 ./*)
  59                         url="${url#./}"
  60                         ;;
  61                 *)
  62                         break;;
  63                 esac
  64         done
  65         echo "$remoteurl/$url"
  66 }
  67
  68 #
  69 # Map submodule path to submodule name
  70 #
  71 # $1 = path
  72 #
  73 module_name()
  74 {
  75         # Do we have "submodule.<something>.path = $1" defined in .gitmodules file?
  76         re=$(printf '%s' "$1" | sed -e 's/[].[^$\\*]/\\&/g')
  77         name=$( GIT_CONFIG=.gitmodules \
  78                 git config --get-regexp '^submodule\..*\.path$' |
  79                 sed -n -e 's|^submodule\.\(.*\)\.path '"$re"'$|\1|p' )
  80        test -z "$name" &&
  81        die "No submodule mapping found in .gitmodules for path '$path'"
  82        echo "$name"
  83 }
  84
  85 #
  86 # Clone a submodule
  87 #
  88 # Prior to calling, cmd_update checks that a possibly existing
  89 # path is not a git repository.
  90 # Likewise, cmd_add checks that path does not exist at all,
  91 # since it is the location of a new submodule.
  92 #
  93 module_clone()
  94 {
  95         path=$1
  96         url=$2
  97
  98         # If there already is a directory at the submodule path,
  99         # expect it to be empty (since that is the default checkout
 100         # action) and try to remove it.
 101         # Note: if $path is a symlink to a directory the test will
 102         # succeed but the rmdir will fail. We might want to fix this.
 103         if test -d "$path"
 104         then
 105                 rmdir "$path" 2>/dev/null ||
 106                 die "Directory '$path' exist, but is neither empty nor a git repository"
 107         fi
 108
 109         test -e "$path" &&
 110         die "A file already exist at path '$path'"
 111
 112         git-clone -n "$url" "$path" ||
 113         die "Clone of '$url' into submodule path '$path' failed"
 114 }
 115
 116 #
 117 # Add a new submodule to the working tree, .gitmodules and the index
 118 #
 119 # $@ = repo [path]
 120 #
 121 # optional branch is stored in global branch variable
 122 #
 123 cmd_add()
 124 {
 125         # parse $args after "submodule ... add".
 126         while test $# -ne 0
 127         do
 128                 case "$1" in
 129                 -b | --branch)
 130                         case "$2" in '') usage ;; esac
 131                         branch=$2
 132                         shift
 133                         ;;
 134                 -q|--quiet)
 135                         quiet=1
 136                         ;;
 137                 --)
 138                         shift
 139                         break
 140                         ;;
 141                 -*)
 142                         usage
 143                         ;;
 144                 *)
 145                         break
 146                         ;;
 147                 esac
 148                 shift
 149         done
 150
 151         repo=$1
 152         path=$2
 153
 154         if test -z "$repo"; then
 155                 usage
 156         fi
 157
 158         # Guess path from repo if not specified or strip trailing slashes
 159         if test -z "$path"; then
 160                 path=$(echo "$repo" | sed -e 's|/*$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
 161         else
 162                 path=$(echo "$path" | sed -e 's|/*$||')
 163         fi
 164
 165         git ls-files --error-unmatch "$path" > /dev/null 2>&1 &&
 166         die "'$path' already exists in the index"
 167
 168         # perhaps the path exists and is already a git repo, else clone it
 169         if test -e "$path"
 170         then
 171                 if test -d "$path/.git" &&
 172                 test "$(unset GIT_DIR; cd $path; git rev-parse --git-dir)" = ".git"
 173                 then
 174                         echo "Adding existing repo at '$path' to the index"
 175                 else
 176                         die "'$path' already exists and is not a valid git repo"
 177                 fi
 178         else
 179                 case "$repo" in
 180                 ./*|../*)
 181                         # dereference source url relative to parent's url
 182                         realrepo="$(resolve_relative_url $repo)" ;;
 183                 *)
 184                         # Turn the source into an absolute path if
 185                         # it is local
 186                         if base=$(get_repo_base "$repo"); then
 187                                 repo="$base"
 188                         fi
 189                         realrepo=$repo
 190                         ;;
 191                 esac
 192
 193                 module_clone "$path" "$realrepo" || exit
 194                 (unset GIT_DIR; cd "$path" && git checkout -q ${branch:+-b "$branch" "origin/$branch"}) ||
 195                 die "Unable to checkout submodule '$path'"
 196         fi
 197
 198         git add "$path" ||
 199         die "Failed to add submodule '$path'"
 200
 201         GIT_CONFIG=.gitmodules git config submodule."$path".path "$path" &&
 202         GIT_CONFIG=.gitmodules git config submodule."$path".url "$repo" &&
 203         git add .gitmodules ||
 204         die "Failed to register submodule '$path'"
 205 }
 206
 207 #
 208 # Register submodules in .git/config
 209 #
 210 # $@ = requested paths (default to all)
 211 #
 212 cmd_init()
 213 {
 214         # parse $args after "submodule ... init".
 215         while test $# -ne 0
 216         do
 217                 case "$1" in
 218                 -q|--quiet)
 219                         quiet=1
 220                         ;;
 221                 --)
 222                         shift
 223                         break
 224                         ;;
 225                 -*)
 226                         usage
 227                         ;;
 228                 *)
 229                         break
 230                         ;;
 231                 esac
 232                 shift
 233         done
 234
 235         git ls-files --stage -- "$@" | grep '^160000 ' |
 236         while read mode sha1 stage path
 237         do
 238                 # Skip already registered paths
 239                 name=$(module_name "$path") || exit
 240                 url=$(git config submodule."$name".url)
 241                 test -z "$url" || continue
 242
 243                 url=$(GIT_CONFIG=.gitmodules git config submodule."$name".url)
 244                 test -z "$url" &&
 245                 die "No url found for submodule path '$path' in .gitmodules"
 246
 247                 # Possibly a url relative to parent
 248                 case "$url" in
 249                 ./*|../*)
 250                         url="$(resolve_relative_url "$url")"
 251                         ;;
 252                 esac
 253
 254                 git config submodule."$name".url "$url" ||
 255                 die "Failed to register url for submodule path '$path'"
 256
 257                 say "Submodule '$name' ($url) registered for path '$path'"
 258         done
 259 }
 260
 261 #
 262 # Update each submodule path to correct revision, using clone and checkout as needed
 263 #
 264 # $@ = requested paths (default to all)
 265 #
 266 cmd_update()
 267 {
 268         # parse $args after "submodule ... update".
 269         while test $# -ne 0
 270         do
 271                 case "$1" in
 272                 -q|--quiet)
 273                         quiet=1
 274                         ;;
 275                 --)
 276                         shift
 277                         break
 278                         ;;
 279                 -*)
 280                         usage
 281                         ;;
 282                 *)
 283                         break
 284                         ;;
 285                 esac
 286                 shift
 287         done
 288
 289         git ls-files --stage -- "$@" | grep '^160000 ' |
 290         while read mode sha1 stage path
 291         do
 292                 name=$(module_name "$path") || exit
 293                 url=$(git config submodule."$name".url)
 294                 if test -z "$url"
 295                 then
 296                         # Only mention uninitialized submodules when its
 297                         # path have been specified
 298                         test "$#" != "0" &&
 299                         say "Submodule path '$path' not initialized"
 300                         continue
 301                 fi
 302
 303                 if ! test -d "$path"/.git
 304                 then
 305                         module_clone "$path" "$url" || exit
 306                         subsha1=
 307                 else
 308                         subsha1=$(unset GIT_DIR; cd "$path" &&
 309                                 git rev-parse --verify HEAD) ||
 310                         die "Unable to find current revision in submodule path '$path'"
 311                 fi
 312
 313                 if test "$subsha1" != "$sha1"
 314                 then
 315                         (unset GIT_DIR; cd "$path" && git-fetch &&
 316                                 git-checkout -q "$sha1") ||
 317                         die "Unable to checkout '$sha1' in submodule path '$path'"
 318
 319                         say "Submodule path '$path': checked out '$sha1'"
 320                 fi
 321         done
 322 }
 323
 324 set_name_rev () {
 325         revname=$( (
 326                 unset GIT_DIR
 327                 cd "$1" && {
 328                         git describe "$2" 2>/dev/null ||
 329                         git describe --tags "$2" 2>/dev/null ||
 330                         git describe --contains "$2" 2>/dev/null ||
 331                         git describe --all --always "$2"
 332                 }
 333         ) )
 334         test -z "$revname" || revname=" ($revname)"
 335 }
 336 #
 337 # Show commit summary for submodules in index or working tree
 338 #
 339 # If '--cached' is given, show summary between index and given commit,
 340 # or between working tree and given commit
 341 #
 342 # $@ = [commit (default 'HEAD'),] requested paths (default all)
 343 #
 344 cmd_summary() {
 345         summary_limit=-1
 346         for_status=
 347
 348         # parse $args after "submodule ... summary".
 349         while test $# -ne 0
 350         do
 351                 case "$1" in
 352                 --cached)
 353                         cached="$1"
 354                         ;;
 355                 --for-status)
 356                         for_status="$1"
 357                         ;;
 358                 -n|--summary-limit)
 359                         if summary_limit=$(($2 + 0)) 2>/dev/null && test "$summary_limit" = "$2"
 360                         then
 361                                 :
 362                         else
 363                                 usage
 364                         fi
 365                         shift
 366                         ;;
 367                 --)
 368                         shift
 369                         break
 370                         ;;
 371                 -*)
 372                         usage
 373                         ;;
 374                 *)
 375                         break
 376                         ;;
 377                 esac
 378                 shift
 379         done
 380
 381         test $summary_limit = 0 && return
 382
 383         if rev=$(git rev-parse --verify "$1^0" 2>/dev/null)
 384         then
 385                 head=$rev
 386                 shift
 387         else
 388                 head=HEAD
 389         fi
 390
 391         cd_to_toplevel
 392         # Get modified modules cared by user
 393         modules=$(git diff-index $cached --raw $head -- "$@" |
 394                 grep -e '^:160000' -e '^:[0-7]* 160000' |
 395                 while read mod_src mod_dst sha1_src sha1_dst status name
 396                 do
 397                         # Always show modules deleted or type-changed (blob<->module)
 398                         test $status = D -o $status = T && echo "$name" && continue
 399                         # Also show added or modified modules which are checked out
 400                         GIT_DIR="$name/.git" git-rev-parse --git-dir >/dev/null 2>&1 &&
 401                         echo "$name"
 402                 done
 403         )
 404
 405         test -z "$modules" && return
 406
 407         git diff-index $cached --raw $head -- $modules |
 408         grep -e '^:160000' -e '^:[0-7]* 160000' |
 409         cut -c2- |
 410         while read mod_src mod_dst sha1_src sha1_dst status name
 411         do
 412                 if test -z "$cached" &&
 413                         test $sha1_dst = 0000000000000000000000000000000000000000
 414                 then
 415                         case "$mod_dst" in
 416                         160000)
 417                                 sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
 418                                 ;;
 419                         100644 | 100755 | 120000)
 420                                 sha1_dst=$(git hash-object $name)
 421                                 ;;
 422                         000000)
 423                                 ;; # removed
 424                         *)
 425                                 # unexpected type
 426                                 echo >&2 "unexpected mode $mod_dst"
 427                                 continue ;;
 428                         esac
 429                 fi
 430                 missing_src=
 431                 missing_dst=
 432
 433                 test $mod_src = 160000 &&
 434                 ! GIT_DIR="$name/.git" git-rev-parse --verify $sha1_src^0 >/dev/null 2>&1 &&
 435                 missing_src=t
 436
 437                 test $mod_dst = 160000 &&
 438                 ! GIT_DIR="$name/.git" git-rev-parse --verify $sha1_dst^0 >/dev/null 2>&1 &&
 439                 missing_dst=t
 440
 441                 total_commits=
 442                 case "$missing_src,$missing_dst" in
 443                 t,)
 444                         errmsg="  Warn: $name doesn't contain commit $sha1_src"
 445                         ;;
 446                 ,t)
 447                         errmsg="  Warn: $name doesn't contain commit $sha1_dst"
 448                         ;;
 449                 t,t)
 450                         errmsg="  Warn: $name doesn't contain commits $sha1_src and $sha1_dst"
 451                         ;;
 452                 *)
 453                         errmsg=
 454                         total_commits=$(
 455                         if test $mod_src = 160000 -a $mod_dst = 160000
 456                         then
 457                                 range="$sha1_src...$sha1_dst"
 458                         elif test $mod_src = 160000
 459                         then
 460                                 range=$sha1_src
 461                         else
 462                                 range=$sha1_dst
 463                         fi
 464                         GIT_DIR="$name/.git" \
 465                         git log --pretty=oneline --first-parent $range | wc -l
 466                         )
 467                         total_commits=" ($(($total_commits + 0)))"
 468                         ;;
 469                 esac
 470
 471                 sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
 472                 sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
 473                 if test $status = T
 474                 then
 475                         if test $mod_dst = 160000
 476                         then
 477                                 echo "* $name $sha1_abbr_src(blob)->$sha1_abbr_dst(submodule)$total_commits:"
 478                         else
 479                                 echo "* $name $sha1_abbr_src(submodule)->$sha1_abbr_dst(blob)$total_commits:"
 480                         fi
 481                 else
 482                         echo "* $name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
 483                 fi
 484                 if test -n "$errmsg"
 485                 then
 486                         # Don't give error msg for modification whose dst is not submodule
 487                         # i.e. deleted or changed to blob
 488                         test $mod_dst = 160000 && echo "$errmsg"
 489                 else
 490                         if test $mod_src = 160000 -a $mod_dst = 160000
 491                         then
 492                                 limit=
 493                                 test $summary_limit -gt 0 && limit="-$summary_limit"
 494                                 GIT_DIR="$name/.git" \
 495                                 git log $limit --pretty='format:  %m %s' \
 496                                 --first-parent $sha1_src...$sha1_dst
 497                         elif test $mod_dst = 160000
 498                         then
 499                                 GIT_DIR="$name/.git" \
 500                                 git log --pretty='format:  > %s' -1 $sha1_dst
 501                         else
 502                                 GIT_DIR="$name/.git" \
 503                                 git log --pretty='format:  < %s' -1 $sha1_src
 504                         fi
 505                         echo
 506                 fi
 507                 echo
 508         done |
 509         if test -n "$for_status"; then
 510                 echo "# Modified submodules:"
 511                 echo "#"
 512                 sed -e 's|^|# |' -e 's|^# $|#|'
 513         else
 514                 cat
 515         fi
 516 }
 517 #
 518 # List all submodules, prefixed with:
 519 #  - submodule not initialized
 520 #  + different revision checked out
 521 #
 522 # If --cached was specified the revision in the index will be printed
 523 # instead of the currently checked out revision.
 524 #
 525 # $@ = requested paths (default to all)
 526 #
 527 cmd_status()
 528 {
 529         # parse $args after "submodule ... status".
 530         while test $# -ne 0
 531         do
 532                 case "$1" in
 533                 -q|--quiet)
 534                         quiet=1
 535                         ;;
 536                 --cached)
 537                         cached=1
 538                         ;;
 539                 --)
 540                         shift
 541                         break
 542                         ;;
 543                 -*)
 544                         usage
 545                         ;;
 546                 *)
 547                         break
 548                         ;;
 549                 esac
 550                 shift
 551         done
 552
 553         git ls-files --stage -- "$@" | grep '^160000 ' |
 554         while read mode sha1 stage path
 555         do
 556                 name=$(module_name "$path") || exit
 557                 url=$(git config submodule."$name".url)
 558                 if test -z "$url" || ! test -d "$path"/.git
 559                 then
 560                         say "-$sha1 $path"
 561                         continue;
 562                 fi
 563                 set_name_rev "$path" "$sha1"
 564                 if git diff-files --quiet -- "$path"
 565                 then
 566                         say " $sha1 $path$revname"
 567                 else
 568                         if test -z "$cached"
 569                         then
 570                                 sha1=$(unset GIT_DIR; cd "$path" && git rev-parse --verify HEAD)
 571                                 set_name_rev "$path" "$sha1"
 572                         fi
 573                         say "+$sha1 $path$revname"
 574                 fi
 575         done
 576 }
 577
 578 # This loop parses the command line arguments to find the
 579 # subcommand name to dispatch.  Parsing of the subcommand specific
 580 # options are primarily done by the subcommand implementations.
 581 # Subcommand specific options such as --branch and --cached are
 582 # parsed here as well, for backward compatibility.
 583
 584 while test $# != 0 && test -z "$command"
 585 do
 586         case "$1" in
 587         add | init | update | status | summary)
 588                 command=$1
 589                 ;;
 590         -q|--quiet)
 591                 quiet=1
 592                 ;;
 593         -b|--branch)
 594                 case "$2" in
 595                 '')
 596                         usage
 597                         ;;
 598                 esac
 599                 branch="$2"; shift
 600                 ;;
 601         --cached)
 602                 cached="$1"
 603                 ;;
 604         --)
 605                 break
 606                 ;;
 607         -*)
 608                 usage
 609                 ;;
 610         *)
 611                 break
 612                 ;;
 613         esac
 614         shift
 615 done
 616
 617 # No command word defaults to "status"
 618 test -n "$command" || command=status
 619
 620 # "-b branch" is accepted only by "add"
 621 if test -n "$branch" && test "$command" != add
 622 then
 623         usage
 624 fi
 625
 626 # "--cached" is accepted only by "status" and "summary"
 627 if test -n "$cached" && test "$command" != status -a "$command" != summary
 628 then
 629         usage
 630 fi
 631
 632 "cmd_$command" "$@"