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