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config.rb
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config.rb
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# frozen_string_literal: true
require 'pathname'
module RuboCop
# This class represents the configuration of the RuboCop application
# and all its cops. A Config is associated with a YAML configuration
# file from which it was read. Several different Configs can be used
# during a run of the rubocop program, if files in several
# directories are inspected.
# rubocop:disable Metrics/ClassLength
class Config
include PathUtil
include FileFinder
COMMON_PARAMS = %w[Exclude Include Severity inherit_mode
AutoCorrect StyleGuide Details].freeze
INTERNAL_PARAMS = %w[Description StyleGuide VersionAdded
VersionChanged Reference Safe SafeAutoCorrect].freeze
# 2.2 is the oldest officially supported Ruby version.
DEFAULT_RUBY_VERSION = 2.2
KNOWN_RUBIES = [2.2, 2.3, 2.4, 2.5, 2.6].freeze
OBSOLETE_RUBIES = { 1.9 => '0.50', 2.0 => '0.50', 2.1 => '0.58' }.freeze
RUBY_VERSION_FILENAME = '.ruby-version'.freeze
DEFAULT_RAILS_VERSION = 5.0
OBSOLETE_COPS = {
'Style/FlipFlop' =>
'The `Style/FlipFlop` cop has been moved to `Lint/FlipFlop`.',
'Style/TrailingComma' =>
'The `Style/TrailingComma` cop no longer exists. Please use ' \
'`Style/TrailingCommaInArguments`, ' \
'`Style/TrailingCommaInArrayLiteral`, and/or ' \
'`Style/TrailingCommaInHashLiteral` instead.',
'Style/TrailingCommaInLiteral' =>
'The `Style/TrailingCommaInLiteral` cop no longer exists. Please use ' \
'`Style/TrailingCommaInArrayLiteral` and/or ' \
'`Style/TrailingCommaInHashLiteral` instead.',
'Rails/DefaultScope' =>
'The `Rails/DefaultScope` cop no longer exists.',
'Lint/InvalidCharacterLiteral' =>
'The `Lint/InvalidCharacterLiteral` cop has been removed since it ' \
'was never being actually triggered.',
'Style/SingleSpaceBeforeFirstArg' =>
'The `Style/SingleSpaceBeforeFirstArg` cop has been renamed to ' \
'`Layout/SpaceBeforeFirstArg`.',
'Lint/RescueWithoutErrorClass' =>
'The `Lint/RescueWithoutErrorClass` cop has been replaced by ' \
'`Style/RescueStandardError`.',
'Lint/SpaceBeforeFirstArg' =>
'The `Lint/SpaceBeforeFirstArg` cop has been removed, since it was a ' \
'duplicate of `Layout/SpaceBeforeFirstArg`. Please use ' \
'`Layout/SpaceBeforeFirstArg` instead.',
'Layout/FirstParameterIndentation' =>
'The `Layout/FirstParameterIndentation` cop has been renamed to ' \
'`Layout/IndentFirstArgument`.',
'Layout/SpaceAfterControlKeyword' =>
'The `Layout/SpaceAfterControlKeyword` cop has been removed. Please ' \
'use `Layout/SpaceAroundKeyword` instead.',
'Layout/SpaceBeforeModifierKeyword' =>
'The `Layout/SpaceBeforeModifierKeyword` cop has been removed. ' \
'Please use `Layout/SpaceAroundKeyword` instead.',
'Style/SpaceAfterControlKeyword' =>
'The `Style/SpaceAfterControlKeyword` cop has been removed. Please ' \
'use `Layout/SpaceAroundKeyword` instead.',
'Style/SpaceBeforeModifierKeyword' =>
'The `Style/SpaceBeforeModifierKeyword` cop has been removed. Please ' \
'use `Layout/SpaceAroundKeyword` instead.',
'Style/MethodCallParentheses' =>
'The `Style/MethodCallParentheses` cop has been renamed to ' \
'`Style/MethodCallWithoutArgsParentheses`.',
'Lint/Eval' =>
'The `Lint/Eval` cop has been renamed to `Security/Eval`.',
'Style/DeprecatedHashMethods' =>
'The `Style/DeprecatedHashMethods` cop has been renamed to ' \
'`Style/PreferredHashMethods`.',
'Style/AccessorMethodName' =>
'The `Style/AccessorMethodName` cop has been moved to ' \
'`Naming/AccessorMethodName`.',
'Style/AsciiIdentifiers' =>
'The `Style/AsciiIdentifiers` cop has been moved to ' \
'`Naming/AccessorMethodName`.',
'Style/OpMethod' =>
'The `Style/OpMethod` cop has been renamed and moved to ' \
'`Naming/BinaryOperatorParameterName`.',
'Style/ClassAndModuleCamelCase' =>
'The `Style/ClassAndModuleCamelCase` cop has been renamed to ' \
'`Naming/ClassAndModuleCamelCase`.',
'Style/ConstantName' =>
'The `Style/ConstantName` cop has been renamed to ' \
'`Naming/ConstantName`.',
'Style/FileName' =>
'The `Style/FileName` cop has been renamed to `Naming/FileName`.',
'Style/MethodName' =>
'The `Style/MethodName` cop has been renamed to ' \
'`Naming/MethodName`.',
'Style/PredicateName' =>
'The `Style/PredicateName` cop has been renamed to ' \
'`Naming/PredicateName`.',
'Style/VariableName' =>
'The `Style/VariableName` cop has been renamed to ' \
'`Naming/VariableName`.',
'Style/VariableNumber' =>
'The `Style/VariableNumber` cop has been renamed to ' \
'`Naming/VariableNumber`.',
'Lint/BlockAlignment' =>
'The `Lint/BlockAlignment` cop has been renamed to ' \
'`Layout/BlockAlignment`.',
'Lint/EndAlignment' =>
'The `Lint/EndAlignment` cop has been renamed to ' \
'`Layout/EndAlignment`.',
'Lint/DefEndAlignment' =>
'The `Lint/DefEndAlignment` cop has been renamed to ' \
'`Layout/DefEndAlignment`.',
'Style/MethodMissing' =>
'The `Style/MethodMissing` cop has been split into ' \
'`Style/MethodMissingSuper` and `Style/MissingRespondToMissing`.'
}.freeze
OBSOLETE_PARAMETERS = [
{
cop: 'Layout/SpaceAroundOperators',
parameter: 'MultiSpaceAllowedForOperators',
alternative: 'If your intention was to allow extra spaces ' \
'for alignment, please use AllowForAlignment: ' \
'true instead.'
},
{
cop: 'Style/Encoding',
parameter: 'EnforcedStyle',
alternative: 'Style/Encoding no longer supports styles. ' \
'The "never" behavior is always assumed.'
},
{
cop: 'Style/Encoding',
parameter: 'SupportedStyles',
alternative: 'Style/Encoding no longer supports styles. ' \
'The "never" behavior is always assumed.'
},
{
cop: 'Style/Encoding',
parameter: 'AutoCorrectEncodingComment',
alternative: 'Style/Encoding no longer supports styles. ' \
'The "never" behavior is always assumed.'
},
{
cop: 'Style/IfUnlessModifier',
parameter: 'MaxLineLength',
alternative:
'`Style/IfUnlessModifier: MaxLineLength` has been removed. Use ' \
'`Metrics/LineLength: Max` instead'
},
{
cop: 'Style/SpaceAroundOperators',
parameter: 'MultiSpaceAllowedForOperators',
alternative: 'If your intention was to allow extra spaces ' \
'for alignment, please use AllowForAlignment: ' \
'true instead.'
},
{
cop: 'Style/WhileUntilModifier',
parameter: 'MaxLineLength',
alternative:
'`Style/WhileUntilModifier: MaxLineLength` has been removed. Use ' \
'`Metrics/LineLength: Max` instead'
},
{
cop: 'AllCops',
parameter: 'RunRailsCops',
alternative: "Use the following configuration instead:\n" \
"Rails:\n Enabled: true"
},
{
cop: 'Layout/CaseIndentation',
parameter: 'IndentWhenRelativeTo',
alternative: '`IndentWhenRelativeTo` has been renamed to ' \
'`EnforcedStyle`'
},
{
cop: 'Lint/BlockAlignment',
parameter: 'AlignWith',
alternative: '`AlignWith` has been renamed to ' \
'`EnforcedStyleAlignWith`'
},
{
cop: 'Layout/BlockAlignment',
parameter: 'AlignWith',
alternative: '`AlignWith` has been renamed to ' \
'`EnforcedStyleAlignWith`'
},
{
cop: 'Lint/EndAlignment',
parameter: 'AlignWith',
alternative: '`AlignWith` has been renamed to ' \
'`EnforcedStyleAlignWith`'
},
{
cop: 'Layout/EndAlignment',
parameter: 'AlignWith',
alternative: '`AlignWith` has been renamed to ' \
'`EnforcedStyleAlignWith`'
},
{
cop: 'Lint/DefEndAlignment',
parameter: 'AlignWith',
alternative: '`AlignWith` has been renamed to ' \
'`EnforcedStyleAlignWith`'
},
{
cop: 'Layout/DefEndAlignment',
parameter: 'AlignWith',
alternative: '`AlignWith` has been renamed to ' \
'`EnforcedStyleAlignWith`'
},
{
cop: 'Rails/UniqBeforePluck',
parameter: 'EnforcedMode',
alternative: '`EnforcedMode` has been renamed to ' \
'`EnforcedStyle`'
}
].freeze
attr_reader :loaded_path
def initialize(hash = {}, loaded_path = nil)
@loaded_path = loaded_path
@for_cop = Hash.new do |h, cop|
qualified_cop_name = Cop::Cop.qualified_cop_name(cop, loaded_path)
cop_options = self[qualified_cop_name] || {}
cop_options['Enabled'] = enable_cop?(qualified_cop_name, cop_options)
h[cop] = cop_options
end
@hash = hash
end
def self.create(hash, path)
new(hash, path).check
end
def check
deprecation_check do |deprecation_message|
warn("#{loaded_path} - #{deprecation_message}")
end
validate
make_excludes_absolute
self
end
def [](key)
@hash[key]
end
def []=(key, value)
@hash[key] = value
end
def delete(key)
@hash.delete(key)
end
def each(&block)
@hash.each(&block)
end
def key?(key)
@hash.key?(key)
end
def keys
@hash.keys
end
def each_key(&block)
@hash.each_key(&block)
end
def map(&block)
@hash.map(&block)
end
def merge(other_hash)
@hash.merge(other_hash)
end
def to_h
@hash
end
def to_hash
@hash
end
def to_s
@to_s ||= @hash.to_s
end
def signature
@signature ||= Digest::SHA1.hexdigest(to_s)
end
def make_excludes_absolute
each_key do |key|
validate_section_presence(key)
next unless self[key]['Exclude']
self[key]['Exclude'].map! do |exclude_elem|
if exclude_elem.is_a?(String) && !absolute?(exclude_elem)
File.expand_path(File.join(base_dir_for_path_parameters,
exclude_elem))
else
exclude_elem
end
end
end
end
def add_excludes_from_higher_level(highest_config)
return unless highest_config.for_all_cops['Exclude']
excludes = for_all_cops['Exclude'] ||= []
highest_config.for_all_cops['Exclude'].each do |path|
unless path.is_a?(Regexp) || absolute?(path)
path = File.join(File.dirname(highest_config.loaded_path), path)
end
excludes << path unless excludes.include?(path)
end
end
def deprecation_check
%w[Exclude Include].each do |key|
plural = "#{key}s"
next unless for_all_cops[plural]
for_all_cops[key] = for_all_cops[plural] # Stay backwards compatible.
for_all_cops.delete(plural)
yield "AllCops/#{plural} was renamed to AllCops/#{key}"
end
end
def for_cop(cop)
@for_cop[cop.respond_to?(:cop_name) ? cop.cop_name : cop]
end
def for_all_cops
@for_all_cops ||= self['AllCops'] || {}
end
def validate
# Don't validate RuboCop's own files. Avoids infinite recursion.
base_config_path = File.expand_path(File.join(ConfigLoader::RUBOCOP_HOME,
'config'))
return if File.expand_path(loaded_path).start_with?(base_config_path)
valid_cop_names, invalid_cop_names = keys.partition do |key|
ConfigLoader.default_configuration.key?(key)
end
reject_obsolete_cops_and_parameters
warn_about_unrecognized_cops(invalid_cop_names)
check_target_ruby
validate_parameter_names(valid_cop_names)
validate_enforced_styles(valid_cop_names)
validate_syntax_cop
reject_mutually_exclusive_defaults
end
def file_to_include?(file)
relative_file_path = path_relative_to_config(file)
# Optimization to quickly decide if the given file is hidden (on the top
# level) and can not be matched by any pattern.
is_hidden = relative_file_path.start_with?('.') &&
!relative_file_path.start_with?('..')
return false if is_hidden && !possibly_include_hidden?
absolute_file_path = File.expand_path(file)
patterns_to_include.any? do |pattern|
if block_given?
yield pattern, relative_file_path, absolute_file_path
else
match_path?(pattern, relative_file_path) ||
match_path?(pattern, absolute_file_path)
end
end
end
def allowed_camel_case_file?(file)
# Gemspecs are allowed to have dashes because that fits with bundler best
# practices in the case when the gem is nested under a namespace (e.g.,
# `bundler-console` conveys `Bundler::Console`).
return true if File.extname(file) == '.gemspec'
file_to_include?(file) do |pattern, relative_path, absolute_path|
pattern.to_s =~ /[A-Z]/ &&
(match_path?(pattern, relative_path) ||
match_path?(pattern, absolute_path))
end
end
# Returns true if there's a chance that an Include pattern matches hidden
# files, false if that's definitely not possible.
def possibly_include_hidden?
return @possibly_include_hidden if defined?(@possibly_include_hidden)
@possibly_include_hidden = patterns_to_include.any? do |s|
s.is_a?(Regexp) || s.start_with?('.') || s.include?('/.')
end
end
def file_to_exclude?(file)
file = File.expand_path(file)
patterns_to_exclude.any? do |pattern|
match_path?(pattern, file)
end
end
def patterns_to_include
for_all_cops['Include'] || []
end
def patterns_to_exclude
for_all_cops['Exclude'] || []
end
def path_relative_to_config(path)
relative_path(path, base_dir_for_path_parameters)
end
# Paths specified in configuration files starting with .rubocop are
# relative to the directory where that file is. Paths in other config files
# are relative to the current directory. This is so that paths in
# config/default.yml, for example, are not relative to RuboCop's config
# directory since that wouldn't work.
def base_dir_for_path_parameters
@base_dir_for_path_parameters ||=
if File.basename(loaded_path).start_with?('.rubocop') &&
loaded_path != File.join(Dir.home, ConfigLoader::DOTFILE)
File.expand_path(File.dirname(loaded_path))
else
Dir.pwd
end
end
def target_ruby_version
@target_ruby_version ||= begin
if for_all_cops['TargetRubyVersion']
@target_ruby_version_source = :rubocop_yml
for_all_cops['TargetRubyVersion'].to_f
elsif target_ruby_version_from_version_file
@target_ruby_version_source = :ruby_version_file
target_ruby_version_from_version_file
elsif target_ruby_version_from_bundler_lock_file
@target_ruby_version_source = :bundler_lock_file
target_ruby_version_from_bundler_lock_file
else
DEFAULT_RUBY_VERSION
end
end
end
def target_rails_version
@target_rails_version ||=
if for_all_cops['TargetRailsVersion']
for_all_cops['TargetRailsVersion'].to_f
elsif target_rails_version_from_bundler_lock_file
target_rails_version_from_bundler_lock_file
else
DEFAULT_RAILS_VERSION
end
end
private
def warn_about_unrecognized_cops(invalid_cop_names)
invalid_cop_names.each do |name|
# There could be a custom cop with this name. If so, don't warn
next if Cop::Cop.registry.contains_cop_matching?([name])
# Special case for inherit_mode, which is a directive that we keep in
# the configuration (even though it's not a cop), because it's easier
# to do so than to pass the value around to various methods.
next if name == 'inherit_mode'
warn Rainbow("Warning: unrecognized cop #{name} found in " \
"#{smart_loaded_path}").yellow
end
end
def validate_syntax_cop
syntax_config = self['Lint/Syntax']
default_config = ConfigLoader.default_configuration['Lint/Syntax']
return unless syntax_config &&
default_config.merge(syntax_config) != default_config
raise ValidationError,
"configuration for Syntax cop found in #{smart_loaded_path}\n" \
'It\'s not possible to disable this cop.'
end
def validate_section_presence(name)
return unless key?(name) && self[name].nil?
raise ValidationError,
"empty section #{name} found in #{smart_loaded_path}"
end
def validate_parameter_names(valid_cop_names)
valid_cop_names.each do |name|
validate_section_presence(name)
default_config = ConfigLoader.default_configuration[name]
self[name].each_key do |param|
next if COMMON_PARAMS.include?(param) || default_config.key?(param)
message =
"Warning: #{name} does not support #{param} parameter.\n\n" \
"Supported parameters are:\n\n" \
" - #{(default_config.keys - INTERNAL_PARAMS).join("\n - ")}\n"
warn Rainbow(message).yellow.to_s
end
end
end
def validate_enforced_styles(valid_cop_names)
valid_cop_names.each do |name|
styles = self[name].select { |key, _| key.start_with?('Enforced') }
styles.each do |style_name, style|
supported_key = RuboCop::Cop::Util.to_supported_styles(style_name)
valid = ConfigLoader.default_configuration[name][supported_key]
next unless valid
next if valid.include?(style)
msg = "invalid #{style_name} '#{style}' for #{name} found in " \
"#{smart_loaded_path}\n" \
"Valid choices are: #{valid.join(', ')}"
raise ValidationError, msg
end
end
end
def reject_obsolete_cops_and_parameters
messages = [
obsolete_cops,
obsolete_parameters
].flatten.compact
return if messages.empty?
raise ValidationError, messages.join("\n")
end
def obsolete_parameters
OBSOLETE_PARAMETERS.map do |params|
obsolete_parameter_message(params[:cop], params[:parameter],
params[:alternative])
end
end
def obsolete_parameter_message(cop, parameter, alternative)
return unless self[cop] && self[cop].key?(parameter)
"obsolete parameter #{parameter} (for #{cop}) " \
"found in #{smart_loaded_path}" \
"\n#{alternative}"
end
def obsolete_cops
OBSOLETE_COPS.map do |cop_name, message|
next unless key?(cop_name) || key?(Cop::Badge.parse(cop_name).cop_name)
message + "\n(obsolete configuration found in #{smart_loaded_path}," \
' please update it)'
end
end
def check_target_ruby
return if KNOWN_RUBIES.include?(target_ruby_version)
msg = if OBSOLETE_RUBIES.include?(target_ruby_version)
"Unsupported Ruby version #{target_ruby_version} found in " \
"#{target_ruby_source}. #{target_ruby_version}-compatible " \
'analysis was dropped after version ' \
"#{OBSOLETE_RUBIES[target_ruby_version]}."
else
"Unknown Ruby version #{target_ruby_version.inspect} found in " \
"#{target_ruby_source}."
end
msg += "\nSupported versions: #{KNOWN_RUBIES.join(', ')}"
raise ValidationError, msg
end
def target_ruby_source
case @target_ruby_version_source
when :ruby_version_file
"`#{RUBY_VERSION_FILENAME}`"
when :bundler_lock_file
"`#{bundler_lock_file_path}`"
when :rubocop_yml
"`TargetRubyVersion` parameter (in #{smart_loaded_path})"
end
end
def ruby_version_file
@ruby_version_file ||=
find_file_upwards(RUBY_VERSION_FILENAME, base_dir_for_path_parameters)
end
def target_ruby_version_from_version_file
file = ruby_version_file
return unless file && File.file?(file)
@target_ruby_version_from_version_file ||=
File.read(file).match(/\A(ruby-)?(?<version>\d+\.\d+)/) do |md|
md[:version].to_f
end
end
def target_ruby_version_from_bundler_lock_file
@target_ruby_version_from_bundler_lock_file ||=
read_ruby_version_from_bundler_lock_file
end
def read_ruby_version_from_bundler_lock_file
lock_file_path = bundler_lock_file_path
return nil unless lock_file_path
in_ruby_section = false
File.foreach(lock_file_path) do |line|
# If ruby is in Gemfile.lock or gems.lock, there should be two lines
# towards the bottom of the file that look like:
# RUBY VERSION
# ruby W.X.YpZ
# We ultimately want to match the "ruby W.X.Y.pZ" line, but there's
# extra logic to make sure we only start looking once we've seen the
# "RUBY VERSION" line.
in_ruby_section ||= line.match(/^\s*RUBY\s*VERSION\s*$/)
next unless in_ruby_section
# We currently only allow this feature to work with MRI ruby. If jruby
# (or something else) is used by the project, it's lock file will have a
# line that looks like:
# RUBY VERSION
# ruby W.X.YpZ (jruby x.x.x.x)
# The regex won't match in this situation.
result = line.match(/^\s*ruby\s+(\d+\.\d+)[p.\d]*\s*$/)
return result.captures.first.to_f if result
end
end
def target_rails_version_from_bundler_lock_file
@target_rails_version_from_bundler_lock_file ||=
read_rails_version_from_bundler_lock_file
end
def read_rails_version_from_bundler_lock_file
lock_file_path = bundler_lock_file_path
return nil unless lock_file_path
File.foreach(lock_file_path) do |line|
# If rails is in Gemfile.lock or gems.lock, there should be a line like:
# rails (X.X.X)
result = line.match(/^\s+rails\s+\((\d+\.\d+)/)
return result.captures.first.to_f if result
end
end
def bundler_lock_file_path
return nil unless loaded_path
base_path = base_dir_for_path_parameters
['gems.locked', 'Gemfile.lock'].each do |file_name|
path = find_file_upwards(file_name, base_path)
return path if path
end
nil
end
def reject_mutually_exclusive_defaults
disabled_by_default = for_all_cops['DisabledByDefault']
enabled_by_default = for_all_cops['EnabledByDefault']
return unless disabled_by_default && enabled_by_default
msg = 'Cops cannot be both enabled by default and disabled by default'
raise ValidationError, msg
end
def enable_cop?(qualified_cop_name, cop_options)
cop_department, cop_name = qualified_cop_name.split('/')
department = cop_name.nil?
unless department
department_options = self[cop_department]
if department_options && department_options['Enabled'] == false
return false
end
end
cop_options.fetch('Enabled', true)
end
def smart_loaded_path
PathUtil.smart_path(@loaded_path)
end
end
# rubocop:enable Metrics/ClassLength
end