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 -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 "$1" in
 266                 -q|--quiet)
 267                         quiet=1
 268                         ;;
 269                 -i|--init)
 270                         shift
 271                         cmd_init "$@" || return
 272                         ;;
 273                 --)
 274                         shift
 275                         break
 276                         ;;
 277                 -*)
 278                         usage
 279                         ;;
 280                 *)
 281                         break
 282                         ;;
 283                 esac
 284                 shift
 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" != "$sha1"
 313                 then
 314                         (unset GIT_DIR; cd "$path" && git-fetch &&
 315                                 git-checkout -q "$sha1") ||
 316                         die "Unable to checkout '$sha1' in submodule path '$path'"
 317
 318                         say "Submodule path '$path': checked out '$sha1'"
 319                 fi
 320         done
 321 }
 322
 323 set_name_rev () {
 324         revname=$( (
 325                 unset GIT_DIR
 326                 cd "$1" && {
 327                         git describe "$2" 2>/dev/null ||
 328                         git describe --tags "$2" 2>/dev/null ||
 329                         git describe --contains "$2" 2>/dev/null ||
 330                         git describe --all --always "$2"
 331                 }
 332         ) )
 333         test -z "$revname" || revname=" ($revname)"
 334 }
 335 #
 336 # Show commit summary for submodules in index or working tree
 337 #
 338 # If '--cached' is given, show summary between index and given commit,
 339 # or between working tree and given commit
 340 #
 341 # $@ = [commit (default 'HEAD'),] requested paths (default all)
 342 #
 343 cmd_summary() {
 344         summary_limit=-1
 345         for_status=
 346
 347         # parse $args after "submodule ... summary".
 348         while test $# -ne 0
 349         do
 350                 case "$1" in
 351                 --cached)
 352                         cached="$1"
 353                         ;;
 354                 --for-status)
 355                         for_status="$1"
 356                         ;;
 357                 -n|--summary-limit)
 358                         if summary_limit=$(($2 + 0)) 2>/dev/null && test "$summary_limit" = "$2"
 359                         then
 360                                 :
 361                         else
 362                                 usage
 363                         fi
 364                         shift
 365                         ;;
 366                 --)
 367                         shift
 368                         break
 369                         ;;
 370                 -*)
 371                         usage
 372                         ;;
 373                 *)
 374                         break
 375                         ;;
 376                 esac
 377                 shift
 378         done
 379
 380         test $summary_limit = 0 && return
 381
 382         if rev=$(git rev-parse --verify "$1^0" 2>/dev/null)
 383         then
 384                 head=$rev
 385                 shift
 386         else
 387                 head=HEAD
 388         fi
 389
 390         cd_to_toplevel
 391         # Get modified modules cared by user
 392         modules=$(git diff-index $cached --raw $head -- "$@" |
 393                 grep -e '^:160000' -e '^:[0-7]* 160000' |
 394                 while read mod_src mod_dst sha1_src sha1_dst status name
 395                 do
 396                         # Always show modules deleted or type-changed (blob<->module)
 397                         test $status = D -o $status = T && echo "$name" && continue
 398                         # Also show added or modified modules which are checked out
 399                         GIT_DIR="$name/.git" git-rev-parse --git-dir >/dev/null 2>&1 &&
 400                         echo "$name"
 401                 done
 402         )
 403
 404         test -z "$modules" && return
 405
 406         git diff-index $cached --raw $head -- $modules |
 407         grep -e '^:160000' -e '^:[0-7]* 160000' |
 408         cut -c2- |
 409         while read mod_src mod_dst sha1_src sha1_dst status name
 410         do
 411                 if test -z "$cached" &&
 412                         test $sha1_dst = 0000000000000000000000000000000000000000
 413                 then
 414                         case "$mod_dst" in
 415                         160000)
 416                                 sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
 417                                 ;;
 418                         100644 | 100755 | 120000)
 419                                 sha1_dst=$(git hash-object $name)
 420                                 ;;
 421                         000000)
 422                                 ;; # removed
 423                         *)
 424                                 # unexpected type
 425                                 echo >&2 "unexpected mode $mod_dst"
 426                                 continue ;;
 427                         esac
 428                 fi
 429                 missing_src=
 430                 missing_dst=
 431
 432                 test $mod_src = 160000 &&
 433                 ! GIT_DIR="$name/.git" git-rev-parse --verify $sha1_src^0 >/dev/null 2>&1 &&
 434                 missing_src=t
 435
 436                 test $mod_dst = 160000 &&
 437                 ! GIT_DIR="$name/.git" git-rev-parse --verify $sha1_dst^0 >/dev/null 2>&1 &&
 438                 missing_dst=t
 439
 440                 total_commits=
 441                 case "$missing_src,$missing_dst" in
 442                 t,)
 443                         errmsg="  Warn: $name doesn't contain commit $sha1_src"
 444                         ;;
 445                 ,t)
 446                         errmsg="  Warn: $name doesn't contain commit $sha1_dst"
 447                         ;;
 448                 t,t)
 449                         errmsg="  Warn: $name doesn't contain commits $sha1_src and $sha1_dst"
 450                         ;;
 451                 *)
 452                         errmsg=
 453                         total_commits=$(
 454                         if test $mod_src = 160000 -a $mod_dst = 160000
 455                         then
 456                                 range="$sha1_src...$sha1_dst"
 457                         elif test $mod_src = 160000
 458                         then
 459                                 range=$sha1_src
 460                         else
 461                                 range=$sha1_dst
 462                         fi
 463                         GIT_DIR="$name/.git" \
 464                         git log --pretty=oneline --first-parent $range | wc -l
 465                         )
 466                         total_commits=" ($(($total_commits + 0)))"
 467                         ;;
 468                 esac
 469
 470                 sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
 471                 sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
 472                 if test $status = T
 473                 then
 474                         if test $mod_dst = 160000
 475                         then
 476                                 echo "* $name $sha1_abbr_src(blob)->$sha1_abbr_dst(submodule)$total_commits:"
 477                         else
 478                                 echo "* $name $sha1_abbr_src(submodule)->$sha1_abbr_dst(blob)$total_commits:"
 479                         fi
 480                 else
 481                         echo "* $name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
 482                 fi
 483                 if test -n "$errmsg"
 484                 then
 485                         # Don't give error msg for modification whose dst is not submodule
 486                         # i.e. deleted or changed to blob
 487                         test $mod_dst = 160000 && echo "$errmsg"
 488                 else
 489                         if test $mod_src = 160000 -a $mod_dst = 160000
 490                         then
 491                                 limit=
 492                                 test $summary_limit -gt 0 && limit="-$summary_limit"
 493                                 GIT_DIR="$name/.git" \
 494                                 git log $limit --pretty='format:  %m %s' \
 495                                 --first-parent $sha1_src...$sha1_dst
 496                         elif test $mod_dst = 160000
 497                         then
 498                                 GIT_DIR="$name/.git" \
 499                                 git log --pretty='format:  > %s' -1 $sha1_dst
 500                         else
 501                                 GIT_DIR="$name/.git" \
 502                                 git log --pretty='format:  < %s' -1 $sha1_src
 503                         fi
 504                         echo
 505                 fi
 506                 echo
 507         done |
 508         if test -n "$for_status"; then
 509                 echo "# Modified submodules:"
 510                 echo "#"
 511                 sed -e 's|^|# |' -e 's|^# $|#|'
 512         else
 513                 cat
 514         fi
 515 }
 516 #
 517 # List all submodules, prefixed with:
 518 #  - submodule not initialized
 519 #  + different revision checked out
 520 #
 521 # If --cached was specified the revision in the index will be printed
 522 # instead of the currently checked out revision.
 523 #
 524 # $@ = requested paths (default to all)
 525 #
 526 cmd_status()
 527 {
 528         # parse $args after "submodule ... status".
 529         while test $# -ne 0
 530         do
 531                 case "$1" in
 532                 -q|--quiet)
 533                         quiet=1
 534                         ;;
 535                 --cached)
 536                         cached=1
 537                         ;;
 538                 --)
 539                         shift
 540                         break
 541                         ;;
 542                 -*)
 543                         usage
 544                         ;;
 545                 *)
 546                         break
 547                         ;;
 548                 esac
 549                 shift
 550         done
 551
 552         git ls-files --stage -- "$@" | grep '^160000 ' |
 553         while read mode sha1 stage path
 554         do
 555                 name=$(module_name "$path") || exit
 556                 url=$(git config submodule."$name".url)
 557                 if test -z "$url" || ! test -d "$path"/.git -o -f "$path"/.git
 558                 then
 559                         say "-$sha1 $path"
 560                         continue;
 561                 fi
 562                 set_name_rev "$path" "$sha1"
 563                 if git diff-files --quiet -- "$path"
 564                 then
 565                         say " $sha1 $path$revname"
 566                 else
 567                         if test -z "$cached"
 568                         then
 569                                 sha1=$(unset GIT_DIR; cd "$path" && git rev-parse --verify HEAD)
 570                                 set_name_rev "$path" "$sha1"
 571                         fi
 572                         say "+$sha1 $path$revname"
 573                 fi
 574         done
 575 }
 576
 577 # This loop parses the command line arguments to find the
 578 # subcommand name to dispatch.  Parsing of the subcommand specific
 579 # options are primarily done by the subcommand implementations.
 580 # Subcommand specific options such as --branch and --cached are
 581 # parsed here as well, for backward compatibility.
 582
 583 while test $# != 0 && test -z "$command"
 584 do
 585         case "$1" in
 586         add | init | update | status | summary)
 587                 command=$1
 588                 ;;
 589         -q|--quiet)
 590                 quiet=1
 591                 ;;
 592         -b|--branch)
 593                 case "$2" in
 594                 '')
 595                         usage
 596                         ;;
 597                 esac
 598                 branch="$2"; shift
 599                 ;;
 600         --cached)
 601                 cached="$1"
 602                 ;;
 603         --)
 604                 break
 605                 ;;
 606         -*)
 607                 usage
 608                 ;;
 609         *)
 610                 break
 611                 ;;
 612         esac
 613         shift
 614 done
 615
 616 # No command word defaults to "status"
 617 test -n "$command" || command=status
 618
 619 # "-b branch" is accepted only by "add"
 620 if test -n "$branch" && test "$command" != add
 621 then
 622         usage
 623 fi
 624
 625 # "--cached" is accepted only by "status" and "summary"
 626 if test -n "$cached" && test "$command" != status -a "$command" != summary
 627 then
 628         usage
 629 fi
 630
 631 "cmd_$command" "$@"