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>...]"
  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 # Resolve relative url by appending to parent's url
  31 resolve_relative_url ()
  32 {
  33         branch="$(git symbolic-ref HEAD 2>/dev/null)"
  34         remote="$(git config branch.${branch#refs/heads/}.remote)"
  35         remote="${remote:-origin}"
  36         remoteurl=$(git config "remote.$remote.url") ||
  37                 die "remote ($remote) does not have a url defined in .git/config"
  38         url="$1"
  39         while test -n "$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 # Map submodule path to submodule name
  58 #
  59 # $1 = path
  60 #
  61 module_name()
  62 {
  63         # Do we have "submodule.<something>.path = $1" defined in .gitmodules file?
  64         re=$(printf '%s\n' "$1" | sed -e 's/[].[^$\\*]/\\&/g')
  65         name=$( git config -f .gitmodules --get-regexp '^submodule\..*\.path$' |
  66                 sed -n -e 's|^submodule\.\(.*\)\.path '"$re"'$|\1|p' )
  67        test -z "$name" &&
  68        die "No submodule mapping found in .gitmodules for path '$path'"
  69        echo "$name"
  70 }
  71
  72 #
  73 # Clone a submodule
  74 #
  75 # Prior to calling, cmd_update checks that a possibly existing
  76 # path is not a git repository.
  77 # Likewise, cmd_add checks that path does not exist at all,
  78 # since it is the location of a new submodule.
  79 #
  80 module_clone()
  81 {
  82         path=$1
  83         url=$2
  84
  85         # If there already is a directory at the submodule path,
  86         # expect it to be empty (since that is the default checkout
  87         # action) and try to remove it.
  88         # Note: if $path is a symlink to a directory the test will
  89         # succeed but the rmdir will fail. We might want to fix this.
  90         if test -d "$path"
  91         then
  92                 rmdir "$path" 2>/dev/null ||
  93                 die "Directory '$path' exist, but is neither empty nor a git repository"
  94         fi
  95
  96         test -e "$path" &&
  97         die "A file already exist at path '$path'"
  98
  99         git-clone -n "$url" "$path" ||
 100         die "Clone of '$url' into submodule path '$path' failed"
 101 }
 102
 103 #
 104 # Add a new submodule to the working tree, .gitmodules and the index
 105 #
 106 # $@ = repo path
 107 #
 108 # optional branch is stored in global branch variable
 109 #
 110 cmd_add()
 111 {
 112         # parse $args after "submodule ... add".
 113         while test $# -ne 0
 114         do
 115                 case "$1" in
 116                 -b | --branch)
 117                         case "$2" in '') usage ;; esac
 118                         branch=$2
 119                         shift
 120                         ;;
 121                 -q|--quiet)
 122                         quiet=1
 123                         ;;
 124                 --)
 125                         shift
 126                         break
 127                         ;;
 128                 -*)
 129                         usage
 130                         ;;
 131                 *)
 132                         break
 133                         ;;
 134                 esac
 135                 shift
 136         done
 137
 138         repo=$1
 139         path=$2
 140
 141         if test -z "$repo" -o -z "$path"; then
 142                 usage
 143         fi
 144
 145         # assure repo is absolute or relative to parent
 146         case "$repo" in
 147         ./*|../*)
 148                 # dereference source url relative to parent's url
 149                 realrepo=$(resolve_relative_url "$repo") || exit
 150                 ;;
 151         *:*|/*)
 152                 # absolute url
 153                 realrepo=$repo
 154                 ;;
 155         *)
 156                 die "repo URL: '$repo' must be absolute or begin with ./|../"
 157         ;;
 158         esac
 159
 160         # strip trailing slashes from path
 161         path=$(echo "$path" | sed -e 's|/*$||')
 162
 163         git ls-files --error-unmatch "$path" > /dev/null 2>&1 &&
 164         die "'$path' already exists in the index"
 165
 166         # perhaps the path exists and is already a git repo, else clone it
 167         if test -e "$path"
 168         then
 169                 if test -d "$path"/.git -o -f "$path"/.git
 170                 then
 171                         echo "Adding existing repo at '$path' to the index"
 172                 else
 173                         die "'$path' already exists and is not a valid git repo"
 174                 fi
 175
 176                 case "$repo" in
 177                 ./*|../*)
 178                         url=$(resolve_relative_url "$repo") || exit
 179                     ;;
 180                 *)
 181                         url="$repo"
 182                         ;;
 183                 esac
 184                 git config submodule."$path".url "$url"
 185         else
 186
 187                 module_clone "$path" "$realrepo" || exit
 188                 (unset GIT_DIR; cd "$path" && git checkout -f -q ${branch:+-b "$branch" "origin/$branch"}) ||
 189                 die "Unable to checkout submodule '$path'"
 190         fi
 191
 192         git add "$path" ||
 193         die "Failed to add submodule '$path'"
 194
 195         git config -f .gitmodules submodule."$path".path "$path" &&
 196         git config -f .gitmodules submodule."$path".url "$repo" &&
 197         git add .gitmodules ||
 198         die "Failed to register submodule '$path'"
 199 }
 200
 201 #
 202 # Register submodules in .git/config
 203 #
 204 # $@ = requested paths (default to all)
 205 #
 206 cmd_init()
 207 {
 208         # parse $args after "submodule ... init".
 209         while test $# -ne 0
 210         do
 211                 case "$1" in
 212                 -q|--quiet)
 213                         quiet=1
 214                         ;;
 215                 --)
 216                         shift
 217                         break
 218                         ;;
 219                 -*)
 220                         usage
 221                         ;;
 222                 *)
 223                         break
 224                         ;;
 225                 esac
 226                 shift
 227         done
 228
 229         git ls-files --stage -- "$@" | grep '^160000 ' |
 230         while read mode sha1 stage path
 231         do
 232                 # Skip already registered paths
 233                 name=$(module_name "$path") || exit
 234                 url=$(git config submodule."$name".url)
 235                 test -z "$url" || continue
 236
 237                 url=$(git config -f .gitmodules submodule."$name".url)
 238                 test -z "$url" &&
 239                 die "No url found for submodule path '$path' in .gitmodules"
 240
 241                 # Possibly a url relative to parent
 242                 case "$url" in
 243                 ./*|../*)
 244                         url=$(resolve_relative_url "$url") || exit
 245                         ;;
 246                 esac
 247
 248                 git config submodule."$name".url "$url" ||
 249                 die "Failed to register url for submodule path '$path'"
 250
 251                 say "Submodule '$name' ($url) registered for path '$path'"
 252         done
 253 }
 254
 255 #
 256 # Update each submodule path to correct revision, using clone and checkout as needed
 257 #
 258 # $@ = requested paths (default to all)
 259 #
 260 cmd_update()
 261 {
 262         # parse $args after "submodule ... update".
 263         while test $# -ne 0
 264         do
 265                 case "$1" in
 266                 -q|--quiet)
 267                         shift
 268                         quiet=1
 269                         ;;
 270                 -i|--init)
 271                         shift
 272                         cmd_init "$@" || return
 273                         ;;
 274                 --)
 275                         shift
 276                         break
 277                         ;;
 278                 -*)
 279                         usage
 280                         ;;
 281                 *)
 282                         break
 283                         ;;
 284                 esac
 285         done
 286
 287         git ls-files --stage -- "$@" | grep '^160000 ' |
 288         while read mode sha1 stage path
 289         do
 290                 name=$(module_name "$path") || exit
 291                 url=$(git config submodule."$name".url)
 292                 if test -z "$url"
 293                 then
 294                         # Only mention uninitialized submodules when its
 295                         # path have been specified
 296                         test "$#" != "0" &&
 297                         say "Submodule path '$path' not initialized"
 298                         say "Maybe you want to use 'update --init'?"
 299                         continue
 300                 fi
 301
 302                 if ! test -d "$path"/.git -o -f "$path"/.git
 303                 then
 304                         module_clone "$path" "$url" || exit
 305                         subsha1=
 306                 else
 307                         subsha1=$(unset GIT_DIR; cd "$path" &&
 308                                 git rev-parse --verify HEAD) ||
 309                         die "Unable to find current revision in submodule path '$path'"
 310                 fi
 311
 312                 if test "$subsha1" != "$sha1"
 313                 then
 314                         force=
 315                         if test -z "$subsha1"
 316                         then
 317                                 force="-f"
 318                         fi
 319                         (unset GIT_DIR; cd "$path" && git-fetch &&
 320                                 git-checkout $force -q "$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" "$@"