class Gem::SpecificationPolicy

# File lib/rubygems/specification_policy.rb, line 23
def initialize(specification)
  @warnings = 0

  @specification = specification
end

# File lib/rubygems/specification_policy.rb, line 43
def validate(strict = false)
  validate_required!

  validate_optional(strict) if packaging || strict

  true
end

# File lib/rubygems/specification_policy.rb, line 119
def validate_metadata
  metadata = @specification.metadata

  unless Hash === metadata
    error 'metadata must be a hash'
  end

  metadata.each do |key, value|
    entry = "metadata['#{key}']"
    if !key.kind_of?(String)
      error "metadata keys must be a String"
    end

    if key.size > 128
      error "metadata key is too large (#{key.size} > 128)"
    end

    if !value.kind_of?(String)
      error "#{entry} value must be a String"
    end

    if value.size > 1024
      error "#{entry} value is too large (#{value.size} > 1024)"
    end

    if METADATA_LINK_KEYS.include? key
      if value !~ VALID_URI_PATTERN
        error "#{entry} has invalid link: #{value.inspect}"
      end
    end
  end
end

# File lib/rubygems/specification_policy.rb, line 94
def validate_optional(strict)
  validate_licenses

  validate_permissions

  validate_values

  validate_dependencies

  validate_extensions

  validate_removed_attributes

  if @warnings > 0
    if strict
      error "specification has warnings"
    else
      alert_warning help_text
    end
  end
end

# File lib/rubygems/specification_policy.rb, line 227
def validate_permissions
  return if Gem.win_platform?

  @specification.files.each do |file|
    next unless File.file?(file)
    next if File.stat(file).mode & 0444 == 0444
    warning "#{file} is not world-readable"
  end

  @specification.executables.each do |name|
    exec = File.join @specification.bindir, name
    next unless File.file?(exec)
    next if File.stat(exec).executable?
    warning "#{exec} is not executable"
  end
end

# File lib/rubygems/specification_policy.rb, line 60
def validate_required!
  validate_nil_attributes

  validate_rubygems_version

  validate_required_attributes

  validate_name

  validate_require_paths

  @specification.keep_only_files_and_directories

  validate_non_files

  validate_self_inclusion_in_files_list

  validate_specification_version

  validate_platform

  validate_array_attributes

  validate_authors_field

  validate_metadata

  validate_licenses_length

  validate_lazy_metadata

  validate_duplicate_dependencies
end

# File lib/rubygems/specification_policy.rb, line 332
def validate_array_attribute(field)
  val = @specification.send(field)
  klass = case field
          when :dependencies then
            Gem::Dependency
          else
            String
          end

  unless Array === val and val.all? {|x| x.kind_of?(klass) }
    error "#{field} must be an Array of #{klass}"
  end
end

# File lib/rubygems/specification_policy.rb, line 326
def validate_array_attributes
  Gem::Specification.array_attributes.each do |field|
    validate_array_attribute(field)
  end
end

# File lib/rubygems/specification_policy.rb, line 441
def validate_attribute_present(attribute)
  value = @specification.send attribute
  warning("no #{attribute} specified") if value.nil? || value.empty?
end

# File lib/rubygems/specification_policy.rb, line 346
def validate_authors_field
  return unless @specification.authors.empty?

  error "authors may not be empty"
end

# File lib/rubygems/specification_policy.rb, line 387
def validate_lazy_metadata
  unless @specification.authors.grep(LAZY_PATTERN).empty?
    error "#{LAZY} is not an author"
  end

  unless Array(@specification.email).grep(LAZY_PATTERN).empty?
    error "#{LAZY} is not an email"
  end

  if @specification.description =~ LAZY_PATTERN
    error "#{LAZY} is not a description"
  end

  if @specification.summary =~ LAZY_PATTERN
    error "#{LAZY} is not a summary"
  end

  homepage = @specification.homepage

  # Make sure a homepage is valid HTTP/HTTPS URI
  if homepage and not homepage.empty?
    require 'uri'
    begin
      homepage_uri = URI.parse(homepage)
      unless [URI::HTTP, URI::HTTPS].member? homepage_uri.class
        error "\"#{homepage}\" is not a valid HTTP URI"
      end
    rescue URI::InvalidURIError
      error "\"#{homepage}\" is not a valid HTTP URI"
    end
  end
end

# File lib/rubygems/specification_policy.rb, line 362
  def validate_licenses
    licenses = @specification.licenses

    licenses.each do |license|
      if !Gem::Licenses.match?(license)
        suggestions = Gem::Licenses.suggestions(license)
        message = <<-WARNING
license value '#{license}' is invalid.  Use a license identifier from
http://spdx.org/licenses or '#{Gem::Licenses::NONSTANDARD}' for a nonstandard license.
        WARNING
        message += "Did you mean #{suggestions.map {|s| "'#{s}'" }.join(', ')}?\n" unless suggestions.nil?
        warning(message)
      end
    end

    warning <<-WARNING if licenses.empty?
licenses is empty, but is recommended.  Use a license identifier from
http://spdx.org/licenses or '#{Gem::Licenses::NONSTANDARD}' for a nonstandard license.
    WARNING
  end

# File lib/rubygems/specification_policy.rb, line 352
def validate_licenses_length
  licenses = @specification.licenses

  licenses.each do |license|
    if license.length > 64
      error "each license must be 64 characters or less"
    end
  end
end

# File lib/rubygems/specification_policy.rb, line 272
def validate_name
  name = @specification.name

  if !name.is_a?(String)
    error "invalid value for attribute name: \"#{name.inspect}\" must be a string"
  elsif name !~ /[a-zA-Z]/
    error "invalid value for attribute name: #{name.dump} must include at least one letter"
  elsif name !~ VALID_NAME_PATTERN
    error "invalid value for attribute name: #{name.dump} can only include letters, numbers, dashes, and underscores"
  elsif name =~ SPECIAL_CHARACTERS
    error "invalid value for attribute name: #{name.dump} can not begin with a period, dash, or underscore"
  end
end

# File lib/rubygems/specification_policy.rb, line 246
def validate_nil_attributes
  nil_attributes = Gem::Specification.non_nil_attributes.select do |attrname|
    @specification.instance_variable_get("@#{attrname}").nil?
  end
  return if nil_attributes.empty?
  error "#{nil_attributes.join ', '} must not be nil"
end

# File lib/rubygems/specification_policy.rb, line 292
def validate_non_files
  return unless packaging

  non_files = @specification.files.reject {|x| File.file?(x) || File.symlink?(x) }

  unless non_files.empty?
    error "[\"#{non_files.join "\", \""}\"] are not files"
  end
end

# File lib/rubygems/specification_policy.rb, line 316
def validate_platform
  platform = @specification.platform

  case platform
  when Gem::Platform, Gem::Platform::RUBY # ok
  else
    error "invalid platform #{platform.inspect}, see Gem::Platform"
  end
end

# File lib/rubygems/specification_policy.rb, line 286
def validate_require_paths
  return unless @specification.raw_require_paths.empty?

  error 'specification must have at least one require_path'
end

# File lib/rubygems/specification_policy.rb, line 264
def validate_required_attributes
  Gem::Specification.required_attributes.each do |symbol|
    unless @specification.send symbol
      error "missing value for attribute #{symbol}"
    end
  end
end

# File lib/rubygems/specification_policy.rb, line 254
def validate_rubygems_version
  return unless packaging

  rubygems_version = @specification.rubygems_version

  return if rubygems_version == Gem::VERSION

  error "expected RubyGems version #{Gem::VERSION}, was #{rubygems_version}"
end

# File lib/rubygems/specification_policy.rb, line 302
def validate_self_inclusion_in_files_list
  file_name = @specification.file_name

  return unless @specification.files.include?(file_name)

  error "#{@specification.full_name} contains itself (#{file_name}), check your files list"
end

# File lib/rubygems/specification_policy.rb, line 446
def validate_shebang_line_in(executable)
  executable_path = File.join(@specification.bindir, executable)
  return if File.read(executable_path, 2) == '#!'

  warning "#{executable_path} is missing #! line"
end

# File lib/rubygems/specification_policy.rb, line 310
def validate_specification_version
  return if @specification.specification_version.is_a?(Integer)

  error 'specification_version must be an Integer (did you mean version?)'
end

# File lib/rubygems/specification_policy.rb, line 420
def validate_values
  %w[author homepage summary files].each do |attribute|
    validate_attribute_present(attribute)
  end

  if @specification.description == @specification.summary
    warning "description and summary are identical"
  end

  # TODO: raise at some given date
  warning "deprecated autorequire specified" if @specification.autorequire

  @specification.executables.each do |executable|
    validate_shebang_line_in(executable)
  end

  @specification.files.select {|f| File.symlink?(f) }.each do |file|
    warning "#{file} is a symlink, which is not supported on all platforms"
  end
end