Fresh start

1 files changed, 650 insertions, 0 deletions

diff --git a/jni/ruby/lib/rubygems/request_set/lockfile.rb b/jni/ruby/lib/rubygems/request_set/lockfile.rb
new file mode 100644
index 0000000..4f2fa09
--- /dev/null
+++ b/jni/ruby/lib/rubygems/request_set/lockfile.rb
@@ -0,0 +1,650 @@
+require 'strscan'
+
+##
+# Parses a gem.deps.rb.lock file and constructs a LockSet containing the
+# dependencies found inside.  If the lock file is missing no LockSet is
+# constructed.
+
+class Gem::RequestSet::Lockfile
+
+  ##
+  # Raised when a lockfile cannot be parsed
+
+  class ParseError < Gem::Exception
+
+    ##
+    # The column where the error was encountered
+
+    attr_reader :column
+
+    ##
+    # The line where the error was encountered
+
+    attr_reader :line
+
+    ##
+    # The location of the lock file
+
+    attr_reader :path
+
+    ##
+    # Raises a ParseError with the given +message+ which was encountered at a
+    # +line+ and +column+ while parsing.
+
+    def initialize message, column, line, path
+      @line   = line
+      @column = column
+      @path   = path
+      super "#{message} (at line #{line} column #{column})"
+    end
+
+  end
+
+  ##
+  # The platforms for this Lockfile
+
+  attr_reader :platforms
+
+  ##
+  # Creates a new Lockfile for the given +request_set+ and +gem_deps_file+
+  # location.
+
+  def initialize request_set, gem_deps_file, dependencies = nil
+    @set           = request_set
+    @dependencies  = dependencies
+    @gem_deps_file = File.expand_path(gem_deps_file)
+    @gem_deps_dir  = File.dirname(@gem_deps_file)
+
+    @gem_deps_file.untaint unless gem_deps_file.tainted?
+
+    @current_token  = nil
+    @line           = 0
+    @line_pos       = 0
+    @platforms      = []
+    @tokens         = []
+  end
+
+  def add_DEPENDENCIES out # :nodoc:
+    out << "DEPENDENCIES"
+
+    dependencies =
+      if @dependencies then
+        @dependencies.sort_by { |name,| name }.map do |name, requirement|
+          requirement_string =
+            if '!' == requirement then
+              requirement
+            else
+              Gem::Requirement.new(requirement).for_lockfile
+            end
+
+          [name, requirement_string]
+        end
+      else
+        @requests.sort_by { |r| r.name }.map do |request|
+          spec        = request.spec
+          name        = request.name
+          requirement = request.request.dependency.requirement
+
+          requirement_string =
+            if [Gem::Resolver::VendorSpecification,
+                Gem::Resolver::GitSpecification].include? spec.class then
+              "!"
+            else
+              requirement.for_lockfile
+            end
+
+          [name, requirement_string]
+        end
+      end
+
+    dependencies = dependencies.map do |name, requirement_string|
+      "  #{name}#{requirement_string}"
+    end
+
+    out.concat dependencies
+
+    out << nil
+  end
+
+  def add_GEM out # :nodoc:
+    return if @spec_groups.empty?
+
+    source_groups = @spec_groups.values.flatten.group_by do |request|
+      request.spec.source.uri
+    end
+
+    source_groups.sort_by { |group,| group.to_s }.map do |group, requests|
+      out << "GEM"
+      out << "  remote: #{group}"
+      out << "  specs:"
+
+      requests.sort_by { |request| request.name }.each do |request|
+        next if request.spec.name == 'bundler'
+        platform = "-#{request.spec.platform}" unless
+          Gem::Platform::RUBY == request.spec.platform
+
+        out << "    #{request.name} (#{request.version}#{platform})"
+
+        request.full_spec.dependencies.sort.each do |dependency|
+          next if dependency.type == :development
+
+          requirement = dependency.requirement
+          out << "      #{dependency.name}#{requirement.for_lockfile}"
+        end
+      end
+      out << nil
+    end
+  end
+
+  def add_GIT out
+    return unless git_requests =
+      @spec_groups.delete(Gem::Resolver::GitSpecification)
+
+    by_repository_revision = git_requests.group_by do |request|
+      source = request.spec.source
+      [source.repository, source.rev_parse]
+    end
+
+    out << "GIT"
+    by_repository_revision.each do |(repository, revision), requests|
+      out << "  remote: #{repository}"
+      out << "  revision: #{revision}"
+      out << "  specs:"
+
+      requests.sort_by { |request| request.name }.each do |request|
+        out << "    #{request.name} (#{request.version})"
+
+        dependencies = request.spec.dependencies.sort_by { |dep| dep.name }
+        dependencies.each do |dep|
+          out << "      #{dep.name}#{dep.requirement.for_lockfile}"
+        end
+      end
+    end
+
+    out << nil
+  end
+
+  def relative_path_from dest, base # :nodoc:
+    dest = File.expand_path(dest)
+    base = File.expand_path(base)
+
+    if dest.index(base) == 0 then
+      offset = dest[base.size+1..-1]
+
+      return '.' unless offset
+
+      offset
+    else
+      dest
+    end
+  end
+
+  def add_PATH out # :nodoc:
+    return unless path_requests =
+      @spec_groups.delete(Gem::Resolver::VendorSpecification)
+
+    out << "PATH"
+    path_requests.each do |request|
+      directory = File.expand_path(request.spec.source.uri)
+
+      out << "  remote: #{relative_path_from directory, @gem_deps_dir}"
+      out << "  specs:"
+      out << "    #{request.name} (#{request.version})"
+    end
+
+    out << nil
+  end
+
+  def add_PLATFORMS out # :nodoc:
+    out << "PLATFORMS"
+
+    platforms = @requests.map { |request| request.spec.platform }.uniq
+
+    platforms = platforms.sort_by { |platform| platform.to_s }
+
+    platforms.sort.each do |platform|
+      out << "  #{platform}"
+    end
+
+    out << nil
+  end
+
+  ##
+  # Gets the next token for a Lockfile
+
+  def get expected_types = nil, expected_value = nil # :nodoc:
+    @current_token = @tokens.shift
+
+    type, value, column, line = @current_token
+
+    if expected_types and not Array(expected_types).include? type then
+      unget
+
+      message = "unexpected token [#{type.inspect}, #{value.inspect}], " +
+                "expected #{expected_types.inspect}"
+
+      raise ParseError.new message, column, line, "#{@gem_deps_file}.lock"
+    end
+
+    if expected_value and expected_value != value then
+      unget
+
+      message = "unexpected token [#{type.inspect}, #{value.inspect}], " +
+                "expected [#{expected_types.inspect}, " +
+                "#{expected_value.inspect}]"
+
+      raise ParseError.new message, column, line, "#{@gem_deps_file}.lock"
+    end
+
+    @current_token
+  end
+
+  def parse # :nodoc:
+    tokenize
+
+    until @tokens.empty? do
+      type, data, column, line = get
+
+      case type
+      when :section then
+        skip :newline
+
+        case data
+        when 'DEPENDENCIES' then
+          parse_DEPENDENCIES
+        when 'GIT' then
+          parse_GIT
+        when 'GEM' then
+          parse_GEM
+        when 'PATH' then
+          parse_PATH
+        when 'PLATFORMS' then
+          parse_PLATFORMS
+        else
+          type, = get until @tokens.empty? or peek.first == :section
+        end
+      else
+        raise "BUG: unhandled token #{type} (#{data.inspect}) at line #{line} column #{column}"
+      end
+    end
+  end
+
+  def parse_DEPENDENCIES # :nodoc:
+    while not @tokens.empty? and :text == peek.first do
+      _, name, = get :text
+
+      requirements = []
+
+      case peek[0]
+      when :bang then
+        get :bang
+
+        requirements << pinned_requirement(name)
+      when :l_paren then
+        get :l_paren
+
+        loop do
+          _, op,      = get :requirement
+          _, version, = get :text
+
+          requirements << "#{op} #{version}"
+
+          break unless peek[0] == :comma
+
+          get :comma
+        end
+
+        get :r_paren
+
+        if peek[0] == :bang then
+          requirements.clear
+          requirements << pinned_requirement(name)
+
+          get :bang
+        end
+      end
+
+      @set.gem name, *requirements
+
+      skip :newline
+    end
+  end
+
+  def parse_GEM # :nodoc:
+    sources = []
+
+    while [:entry, 'remote'] == peek.first(2) do
+      get :entry, 'remote'
+      _, data, = get :text
+      skip :newline
+
+      sources << Gem::Source.new(data)
+    end
+
+    sources << Gem::Source.new(Gem::DEFAULT_HOST) if sources.empty?
+
+    get :entry, 'specs'
+
+    skip :newline
+
+    set = Gem::Resolver::LockSet.new sources
+    last_specs = nil
+
+    while not @tokens.empty? and :text == peek.first do
+      _, name, column, = get :text
+
+      case peek[0]
+      when :newline then
+        last_specs.each do |spec|
+          spec.add_dependency Gem::Dependency.new name if column == 6
+        end
+      when :l_paren then
+        get :l_paren
+
+        type, data, = get [:text, :requirement]
+
+        if type == :text and column == 4 then
+          version, platform = data.split '-', 2
+
+          platform =
+            platform ? Gem::Platform.new(platform) : Gem::Platform::RUBY
+
+          last_specs = set.add name, version, platform
+        else
+          dependency = parse_dependency name, data
+
+          last_specs.each do |spec|
+            spec.add_dependency dependency
+          end
+        end
+
+        get :r_paren
+      else
+        raise "BUG: unknown token #{peek}"
+      end
+
+      skip :newline
+    end
+
+    @set.sets << set
+  end
+
+  def parse_GIT # :nodoc:
+    get :entry, 'remote'
+    _, repository, = get :text
+
+    skip :newline
+
+    get :entry, 'revision'
+    _, revision, = get :text
+
+    skip :newline
+
+    type, value = peek.first 2
+    if type == :entry and %w[branch ref tag].include? value then
+      get
+      get :text
+
+      skip :newline
+    end
+
+    get :entry, 'specs'
+
+    skip :newline
+
+    set = Gem::Resolver::GitSet.new
+    set.root_dir = @set.install_dir
+
+    last_spec = nil
+
+    while not @tokens.empty? and :text == peek.first do
+      _, name, column, = get :text
+
+      case peek[0]
+      when :newline then
+        last_spec.add_dependency Gem::Dependency.new name if column == 6
+      when :l_paren then
+        get :l_paren
+
+        type, data, = get [:text, :requirement]
+
+        if type == :text and column == 4 then
+          last_spec = set.add_git_spec name, data, repository, revision, true
+        else
+          dependency = parse_dependency name, data
+
+          last_spec.add_dependency dependency
+        end
+
+        get :r_paren
+      else
+        raise "BUG: unknown token #{peek}"
+      end
+
+      skip :newline
+    end
+
+    @set.sets << set
+  end
+
+  def parse_PATH # :nodoc:
+    get :entry, 'remote'
+    _, directory, = get :text
+
+    skip :newline
+
+    get :entry, 'specs'
+
+    skip :newline
+
+    set = Gem::Resolver::VendorSet.new
+    last_spec = nil
+
+    while not @tokens.empty? and :text == peek.first do
+      _, name, column, = get :text
+
+      case peek[0]
+      when :newline then
+        last_spec.add_dependency Gem::Dependency.new name if column == 6
+      when :l_paren then
+        get :l_paren
+
+        type, data, = get [:text, :requirement]
+
+        if type == :text and column == 4 then
+          last_spec = set.add_vendor_gem name, directory
+        else
+          dependency = parse_dependency name, data
+
+          last_spec.dependencies << dependency
+        end
+
+        get :r_paren
+      else
+        raise "BUG: unknown token #{peek}"
+      end
+
+      skip :newline
+    end
+
+    @set.sets << set
+  end
+
+  def parse_PLATFORMS # :nodoc:
+    while not @tokens.empty? and :text == peek.first do
+      _, name, = get :text
+
+      @platforms << name
+
+      skip :newline
+    end
+  end
+
+  ##
+  # Parses the requirements following the dependency +name+ and the +op+ for
+  # the first token of the requirements and returns a Gem::Dependency object.
+
+  def parse_dependency name, op # :nodoc:
+    return Gem::Dependency.new name, op unless peek[0] == :text
+
+    _, version, = get :text
+
+    requirements = ["#{op} #{version}"]
+
+    while peek[0] == :comma do
+      get :comma
+      _, op,      = get :requirement
+      _, version, = get :text
+
+      requirements << "#{op} #{version}"
+    end
+
+    Gem::Dependency.new name, requirements
+  end
+
+  ##
+  # Peeks at the next token for Lockfile
+
+  def peek # :nodoc:
+    @tokens.first || [:EOF]
+  end
+
+  def pinned_requirement name # :nodoc:
+    spec = @set.sets.select { |set|
+      Gem::Resolver::GitSet    === set or
+        Gem::Resolver::VendorSet === set
+    }.map { |set|
+      set.specs[name]
+    }.compact.first
+
+    spec.version
+  end
+
+  def skip type # :nodoc:
+    get while not @tokens.empty? and peek.first == type
+  end
+
+  ##
+  # The contents of the lock file.
+
+  def to_s
+    @set.resolve
+
+    out = []
+
+    @requests = @set.sorted_requests
+
+    @spec_groups = @requests.group_by do |request|
+      request.spec.class
+    end
+
+    add_PATH out
+
+    add_GIT out
+
+    add_GEM out
+
+    add_PLATFORMS out
+
+    add_DEPENDENCIES out
+
+    out.join "\n"
+  end
+
+  ##
+  # Calculates the column (by byte) and the line of the current token based on
+  # +byte_offset+.
+
+  def token_pos byte_offset # :nodoc:
+    [byte_offset - @line_pos, @line]
+  end
+
+  ##
+  # Converts a lock file into an Array of tokens.  If the lock file is missing
+  # an empty Array is returned.
+
+  def tokenize # :nodoc:
+    @line     = 0
+    @line_pos = 0
+
+    @platforms     = []
+    @tokens        = []
+    @current_token = nil
+
+    lock_file = "#{@gem_deps_file}.lock"
+
+    @input = File.read lock_file
+    s      = StringScanner.new @input
+
+    until s.eos? do
+      pos = s.pos
+
+      pos = s.pos if leading_whitespace = s.scan(/ +/)
+
+      if s.scan(/[<|=>]{7}/) then
+        message = "your #{lock_file} contains merge conflict markers"
+        column, line = token_pos pos
+
+        raise ParseError.new message, column, line, lock_file
+      end
+
+      @tokens <<
+        case
+        when s.scan(/\r?\n/) then
+          token = [:newline, nil, *token_pos(pos)]
+          @line_pos = s.pos
+          @line += 1
+          token
+        when s.scan(/[A-Z]+/) then
+          if leading_whitespace then
+            text = s.matched
+            text += s.scan(/[^\s)]*/).to_s # in case of no match
+            [:text, text, *token_pos(pos)]
+          else
+            [:section, s.matched, *token_pos(pos)]
+          end
+        when s.scan(/([a-z]+):\s/) then
+          s.pos -= 1 # rewind for possible newline
+          [:entry, s[1], *token_pos(pos)]
+        when s.scan(/\(/) then
+          [:l_paren, nil, *token_pos(pos)]
+        when s.scan(/\)/) then
+          [:r_paren, nil, *token_pos(pos)]
+        when s.scan(/<=|>=|=|~>|<|>|!=/) then
+          [:requirement, s.matched, *token_pos(pos)]
+        when s.scan(/,/) then
+          [:comma, nil, *token_pos(pos)]
+        when s.scan(/!/) then
+          [:bang, nil, *token_pos(pos)]
+        when s.scan(/[^\s),!]*/) then
+          [:text, s.matched, *token_pos(pos)]
+        else
+          raise "BUG: can't create token for: #{s.string[s.pos..-1].inspect}"
+        end
+    end
+
+    @tokens
+  rescue Errno::ENOENT
+    @tokens
+  end
+
+  ##
+  # Ungets the last token retrieved by #get
+
+  def unget # :nodoc:
+    @tokens.unshift @current_token
+  end
+
+  ##
+  # Writes the lock file alongside the gem dependencies file
+
+  def write
+    content = to_s
+
+    open "#{@gem_deps_file}.lock", 'w' do |io|
+      io.write content
+    end
+  end
+
+end
+