class Gem::SpecificationPolicy

# File lib/rubygems/specification_policy.rb, line 26
def initialize(specification)
  @warnings = 0

  @specification = specification
end

# File lib/rubygems/specification_policy.rb, line 46
def validate(strict = false)
  validate_required!
  validate_required_metadata!

  validate_optional(strict) if packaging || strict

  true
end

# File lib/rubygems/specification_policy.rb, line 129
def validate_for_resolution
  validate_required!
end

# File lib/rubygems/specification_policy.rb, line 136
def validate_metadata
  metadata = @specification.metadata

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

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

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

    unless value.is_a?(String)
      error "#{entry} value must be a String"
    end

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

    next unless METADATA_LINK_KEYS.include? key
    unless VALID_URI_PATTERN.match?(value)
      error "#{entry} has invalid link: #{value.inspect}"
    end
  end
end

# File lib/rubygems/specification_policy.rb, line 100
def validate_optional(strict)
  validate_licenses

  validate_permissions

  validate_values

  validate_dependencies

  validate_required_ruby_version

  validate_extensions

  validate_removed_attributes

  validate_unique_links

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

# File lib/rubygems/specification_policy.rb, line 253
def validate_permissions
  return if Gem.win_platform?

  @specification.files.each do |file|
    next unless File.file?(file)
    next if File.stat(file).mode & 0o444 == 0o444
    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 64
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_licenses_length

  validate_duplicate_dependencies
end

# File lib/rubygems/specification_policy.rb, line 94
def validate_required_metadata!
  validate_metadata

  validate_lazy_metadata
end

# File lib/rubygems/specification_policy.rb, line 242
def validate_required_ruby_version
  if @specification.required_ruby_version.requirements == [Gem::Requirement::DefaultRequirement]
    warning "make sure you specify the oldest ruby version constraint (like \">= 3.0\") that you want your gem to support by setting the `required_ruby_version` gemspec attribute"
  end
end

# File lib/rubygems/specification_policy.rb, line 360
def validate_array_attribute(field)
  val = @specification.send(field)
  klass = case field
          when :dependencies then
            Gem::Dependency
          else
            String
  end

  unless Array === val && val.all? {|x| x.is_a?(klass) || (field == :licenses && x.nil?) }
    error "#{field} must be an Array of #{klass}"
  end
end

# File lib/rubygems/specification_policy.rb, line 354
def validate_array_attributes
  Gem::Specification.array_attributes.each do |field|
    validate_array_attribute(field)
  end
end

# File lib/rubygems/specification_policy.rb, line 483
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 374
def validate_authors_field
  return unless @specification.authors.empty?

  error "authors may not be empty"
end

# File lib/rubygems/specification_policy.rb, line 429
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 LAZY_PATTERN.match?(@specification.description)
    error "#{LAZY} is not a description"
  end

  if LAZY_PATTERN.match?(@specification.summary)
    error "#{LAZY} is not a summary"
  end

  homepage = @specification.homepage

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

# File lib/rubygems/specification_policy.rb, line 392
  def validate_licenses
    licenses = @specification.licenses

    licenses.each do |license|
      next if Gem::Licenses.match?(license) || license.nil?
      license_id_deprecated = Gem::Licenses.deprecated_license_id?(license)
      exception_id_deprecated = Gem::Licenses.deprecated_exception_id?(license)
      suggestions = Gem::Licenses.suggestions(license)

      if license_id_deprecated
        main_message = "License identifier '#{license}' is deprecated"
      elsif exception_id_deprecated
        main_message = "Exception identifier at '#{license}' is deprecated"
      else
        main_message = "License identifier '#{license}' is invalid"
      end

      message = <<-WARNING
#{main_message}. Use an identifier from
https://spdx.org/licenses or '#{Gem::Licenses::NONSTANDARD}' for a nonstandard license,
or set it to nil if you don't want to specify a license.
      WARNING
      message += "Did you mean #{suggestions.map {|s| "'#{s}'" }.join(", ")}?\n" unless suggestions.nil?
      warning(message)
    end

    warning <<-WARNING if licenses.empty?
licenses is empty, but is recommended. Use an license identifier from
https://spdx.org/licenses or '#{Gem::Licenses::NONSTANDARD}' for a nonstandard license,
or set it to nil if you don't want to specify a license.
    WARNING
  end

# File lib/rubygems/specification_policy.rb, line 380
def validate_licenses_length
  licenses = @specification.licenses

  licenses.each do |license|
    next if license.nil?

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

# File lib/rubygems/specification_policy.rb, line 300
def validate_name
  name = @specification.name

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

# File lib/rubygems/specification_policy.rb, line 272
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 320
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 344
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 314
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 292
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 280
def validate_rubygems_version
  return unless packaging

  rubygems_version = @specification.rubygems_version

  return if rubygems_version == Gem::VERSION

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

  @specification.rubygems_version = Gem::VERSION
end

# File lib/rubygems/specification_policy.rb, line 330
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 488
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 338
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 527
  def validate_unique_links
    links = @specification.metadata.slice(*METADATA_LINK_KEYS)
    grouped = links.group_by {|_key, uri| uri }
    grouped.each do |uri, copies|
      next unless copies.length > 1
      keys = copies.map(&:first).join("\n  ")
      warning <<~WARNING
        You have specified the uri:
          #{uri}
        for all of the following keys:
          #{keys}
        Only the first one will be shown on rubygems.org
      WARNING
    end
  end

# File lib/rubygems/specification_policy.rb, line 462
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