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Class: RuboCop::Cop::Team

Relationships & Source Files
Namespace Children
Classes:
Inherits: Object
Defined in: lib/rubocop/cop/team.rb

Overview

A group of cops, ready to be called on duty to inspect files. Team is responsible for selecting only relevant cops to be sent on duty, as well as insuring that the needed forces are sent along with them.

For performance reasons, Team will first dispatch cops & forces in two groups, first the ones needed for autocorrection (if any), then the rest (unless autocorrections happened).

Class Method Summary

Instance Attribute Summary

Instance Method Summary

Constructor Details

.new(cop_or_classes, config, options = {}) ⇒ Team

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# File 'lib/rubocop/cop/team.rb', line 18

def self.new(cop_or_classes, config, options = {})
  # Support v0 api:
  if cop_or_classes.first.is_a?(Class)
    warn Rainbow(<<~WARNING).yellow, uplevel: 1
      `Team.new` with cop classes is deprecated. Use `Team.mobilize` instead.
    WARNING
    return mobilize(cop_or_classes, config, options)
  end

  super
end

#initialize(cops, config = nil, options = {}) ⇒ Team

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# File 'lib/rubocop/cop/team.rb', line 74

def initialize(cops, config = nil, options = {})
  @cops = cops
  @config = config
  @options = options
  reset
  @ready = true
  @registry = Registry.new(cops, options.dup)

  validate_config
end

Class Method Details

.forces_for(cops) ⇒ Array<Force>

Returns:

  • (Array<Force>)

    needed for the given cops

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# File 'lib/rubocop/cop/team.rb', line 46

def self.forces_for(cops)
  needed = Hash.new { |h, k| h[k] = [] }
  cops.each do |cop|
    forces = cop.class.joining_forces
    if forces.is_a?(Array)
      forces.each { |force| needed[force] << cop }
    elsif forces
      needed[forces] << cop
    end
  end

  needed.map { |force_class, joining_cops| force_class.new(joining_cops) }
end

.mobilize(cop_classes, config, options = {}) ⇒ Team

Returns:

  • (Team)

    with cops assembled from the given cop_classes

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# File 'lib/rubocop/cop/team.rb', line 31

def self.mobilize(cop_classes, config, options = {})
  cops = mobilize_cops(cop_classes, config, options)
  new(cops, config, options)
end

.mobilize_cops(cop_classes, config, options = {}) ⇒ Array<Cop::Base>

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# File 'lib/rubocop/cop/team.rb', line 37

def self.mobilize_cops(cop_classes, config, options = {})
  cop_classes = Registry.new(cop_classes.to_a, options) unless cop_classes.is_a?(Registry)

  cop_classes.map do |cop_class|
    cop_class.new(config, options)
  end
end

Instance Attribute Details

#autocorrect?Boolean (readonly)

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# File 'lib/rubocop/cop/team.rb', line 85

def autocorrect?
  @options[:autocorrect]
end

#cops (readonly)

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# File 'lib/rubocop/cop/team.rb', line 60

attr_reader :errors, :warnings, :updated_source_file, :cops

#debug?Boolean (readonly)

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# File 'lib/rubocop/cop/team.rb', line 89

def debug?
  @options[:debug]
end

#defer_corrections (rw)

When set to true, the corrected source is not written back to the inspected file; it is exposed through #updated_source instead.

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# File 'lib/rubocop/cop/team.rb', line 65

attr_accessor :defer_corrections

#errors (readonly)

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# File 'lib/rubocop/cop/team.rb', line 60

attr_reader :errors, :warnings, :updated_source_file, :cops

#updated_source (readonly)

The corrected source of the last investigation, if corrections were made with #defer_corrections enabled.

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# File 'lib/rubocop/cop/team.rb', line 70

attr_reader :updated_source

#updated_source_file? (readonly)

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# File 'lib/rubocop/cop/team.rb', line 72

alias updated_source_file? updated_source_file

#warnings (readonly)

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# File 'lib/rubocop/cop/team.rb', line 60

attr_reader :errors, :warnings, :updated_source_file, :cops

Instance Method Details

#apply_correction(processed_source, new_source) (private)

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# File 'lib/rubocop/cop/team.rb', line 157

def apply_correction(processed_source, new_source)
  if @options[:stdin]
    # holds source read in from stdin, when --stdin option is used
    @options[:stdin] = new_source
  elsif defer_corrections
    @updated_source = new_source
  else
    File.write(processed_source.file_path, new_source)
  end
end

#autocorrect(processed_source, corrector) (readonly, private)

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# File 'lib/rubocop/cop/team.rb', line 146

def autocorrect(processed_source, corrector)
  @updated_source_file = false
  @updated_source = nil
  return unless autocorrect?
  return unless corrector
  return if corrector.empty?

  apply_correction(processed_source, corrector.rewrite)
  @updated_source_file = true
end

#be_ready (private)

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# File 'lib/rubocop/cop/team.rb', line 168

def be_ready
  return if @ready

  reset
  @cops.map!(&:ready)
  @ready = true
end

#collate_corrections(report, offset:, original:) (private)

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# File 'lib/rubocop/cop/team.rb', line 270

def collate_corrections(report, offset:, original:)
  corrector = Corrector.new(original)

  each_corrector(report) do |to_merge|
    merge_corrector!(corrector, to_merge, offset: offset)
  end

  corrector
end

#collated_corrector(report, offset:, original:) (private)

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# File 'lib/rubocop/cop/team.rb', line 261

def collated_corrector(report, offset:, original:)
  return unless autocorrect?
  return if report.processed_source.parser_error

  corrector = collate_corrections(report, offset: offset, original: original)

  corrector unless corrector.empty?
end

#each_corrector(report) (private)

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# File 'lib/rubocop/cop/team.rb', line 290

def each_corrector(report)
  skips = Set.new
  report.cop_reports.each do |cop_report|
    cop = cop_report.cop
    corrector = cop_report.corrector

    next if corrector.nil? || corrector.empty?
    next if skips.include?(cop.class)

    yield corrector

    skips.merge(cop.class.autocorrect_incompatible_with)
  end
end

#external_dependency_checksum

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# File 'lib/rubocop/cop/team.rb', line 135

def external_dependency_checksum
  # The external dependency checksums are cached per RuboCop team so that
  # the checksums don't need to be recomputed for each file.
  @external_dependency_checksum ||= begin
    keys = cops.filter_map(&:external_dependency_checksum)
    Digest::SHA1.hexdigest(keys.join)
  end
end

#forces

Deprecated.
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# File 'lib/rubocop/cop/team.rb', line 127

def forces
  warn Rainbow(<<~WARNING).yellow, uplevel: 1
    `forces` is deprecated.
  WARNING

  @forces ||= self.class.forces_for(cops)
end

#handle_error(error, location, cop) (private)

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# File 'lib/rubocop/cop/team.rb', line 342

def handle_error(error, location, cop)
  message = Rainbow("An error occurred while #{cop.name} cop was inspecting #{location}.").red
  @errors << message
  warn message
  if debug?
    puts error.full_message
  else
    warn 'To see the complete backtrace run rubocop -d.'
  end
end

#handle_warning(error, location) (private)

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# File 'lib/rubocop/cop/team.rb', line 334

def handle_warning(error, location)
  message = Rainbow("#{error.message} (from file: #{location})").yellow

  @warnings << message
  warn message
  puts error.backtrace if debug?
end

#inspect_file(processed_source)

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# File 'lib/rubocop/cop/team.rb', line 95

def inspect_file(processed_source)
  warn Rainbow(<<~WARNING).yellow, uplevel: 1
    `inspect_file` is deprecated. Use `investigate` instead.
  WARNING

  investigate(processed_source).offenses
end

#investigate(processed_source, offset: 0, original: processed_source) ⇒ Commissioner::InvestigationReport

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# File 'lib/rubocop/cop/team.rb', line 104

def investigate(processed_source, offset: 0, original: processed_source)
  result = investigate_with_corrector(processed_source, offset: offset, original: original)
  autocorrect(processed_source, result.corrector)
  result.report
end

#investigate_fragment(fragment, original, data) (private)

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# File 'lib/rubocop/cop/team.rb', line 217

def investigate_fragment(fragment, original, data)
  offenses, errors, warnings, corrector = data
  result = investigate_with_corrector(
    fragment[:processed_source],
    offset: fragment[:offset],
    original: original
  )

  offenses.concat(result.report.offenses)
  if result.corrector
    corrector ||= Corrector.new(original)
    merge_corrector!(corrector, result.corrector, offset: 0)
    data[3] = corrector
  end
  errors.concat(@errors)
  warnings.concat(@warnings)
end

#investigate_fragments(fragments, original:) ⇒ Array<Offense>

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# File 'lib/rubocop/cop/team.rb', line 111

def investigate_fragments(fragments, original:)
  @updated_source_file = false

  offenses, errors, warnings, corrector =
    fragments.each_with_object([[], [], [], nil]) do |fragment, data|
      investigate_fragment(fragment, original, data)
    end

  autocorrect(original, corrector)
  @errors = errors
  @warnings = warnings

  offenses
end

#investigate_partial(cops, processed_source, offset:, original:) ⇒ Commissioner::InvestigationReport (private)

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# File 'lib/rubocop/cop/team.rb', line 182

def investigate_partial(cops, processed_source, offset:, original:)
  commissioner = Commissioner.new(cops, self.class.forces_for(cops), @options)
  commissioner.investigate(processed_source, offset: offset, original: original)
end

#investigate_with_corrector(processed_source, offset:, original:) (private)

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# File 'lib/rubocop/cop/team.rb', line 187

def investigate_with_corrector(processed_source, offset:, original:)
  be_ready

  # The autocorrection process may have to be repeated multiple times
  # until there are no corrections left to perform
  # To speed things up, run autocorrecting cops by themselves, and only
  # run the other cops when no corrections are left
  on_duty = roundup_relevant_cops(processed_source)

  autocorrect_cops, other_cops = on_duty.partition(&:autocorrect?)
  report = investigate_partial(autocorrect_cops, processed_source,
                               offset: offset, original: original)

  corrector = collated_corrector(report, offset: offset, original: original)

  unless corrector
    # If we corrected some errors, another round of inspection will be
    # done, and any other offenses will be caught then, so only need
    # to check other_cops if no correction was done
    report = report.merge(investigate_partial(other_cops, processed_source,
                                              offset: offset, original: original))
  end

  process_errors(processed_source.path, report.errors)

  InvestigationResult.new(report, corrector)
ensure
  @ready = false
end

#merge_corrector!(corrector, to_merge, offset:) (private)

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# File 'lib/rubocop/cop/team.rb', line 280

def merge_corrector!(corrector, to_merge, offset:)
  suppress_clobbering do
    if corrector.source_buffer == to_merge.source_buffer
      corrector.merge!(to_merge)
    else
      corrector.import!(to_merge, offset: offset)
    end
  end
end

#process_errors(file, errors) (private)

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# File 'lib/rubocop/cop/team.rb', line 317

def process_errors(file, errors)
  errors.each do |error|
    line = ":#{error.line}" if error.line
    column = ":#{error.column}" if error.column
    location = "#{file}#{line}#{column}"
    cause = error.cause

    if cause.is_a?(Warning)
      handle_warning(cause, location)
    elsif cause.is_a?(Force::HookError)
      handle_error(cause.cause, location, cause.joining_cop)
    else
      handle_error(cause, location, error.cop)
    end
  end
end

#reset (private)

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# File 'lib/rubocop/cop/team.rb', line 176

def reset
  @errors = []
  @warnings = []
end

#roundup_relevant_cops(processed_source) ⇒ Array<cop> (private)

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# File 'lib/rubocop/cop/team.rb', line 236

def roundup_relevant_cops(processed_source)
  cops.select do |cop|
    next false if cop.excluded_file?(processed_source.file_path)
    next true if processed_source.comment_config.cop_opted_in?(cop)
    next false unless @registry.enabled?(cop, @config)

    support_target_ruby_version?(cop) && support_target_rails_version?(cop)
  end
end

#support_target_rails_version?(cop) ⇒ Boolean (private)

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# File 'lib/rubocop/cop/team.rb', line 252

def support_target_rails_version?(cop)
  # In this case, the rails version was already checked by `#excluded_file?`
  return true if defined?(RuboCop::Rails::TargetRailsVersion::USES_REQUIRES_GEM_API)

  return true unless cop.class.respond_to?(:support_target_rails_version?)

  cop.class.support_target_rails_version?(cop.target_rails_version)
end

#support_target_ruby_version?(cop) ⇒ Boolean (private)

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# File 'lib/rubocop/cop/team.rb', line 246

def support_target_ruby_version?(cop)
  return true unless cop.class.respond_to?(:support_target_ruby_version?)

  cop.class.support_target_ruby_version?(cop.target_ruby_version)
end

#suppress_clobbering (private)

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# File 'lib/rubocop/cop/team.rb', line 305

def suppress_clobbering
  yield
rescue ::Parser::ClobberingError
  # ignore Clobbering errors
end

#updated_source_file (readonly) Also known as: #updated_source_file?

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# File 'lib/rubocop/cop/team.rb', line 60

attr_reader :errors, :warnings, :updated_source_file, :cops

#validate_config (private)

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# File 'lib/rubocop/cop/team.rb', line 311

def validate_config
  cops.each do |cop|
    cop.validate_config if cop.respond_to?(:validate_config)
  end
end