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# frozen_string_literal: true
require 'set'
require 'rubocop'
require 'yaml'
require_relative '../todo_dir'
module RuboCop
module Formatter
# This formatter dumps a YAML configuration file per cop rule
# into `.rubocop_todo/**/*.yml` which contains detected offenses.
#
# For example, this formatter stores offenses for `RSpec/VariableName`
# in `.rubocop_todo/rspec/variable_name.yml`.
class TodoFormatter < BaseFormatter
# Disable a cop which exceeds this limit. This way we ensure that we
# don't enable a cop by accident when moving it from
# .rubocop_todo.yml to .rubocop_todo/.
# We keep the cop disabled if it has been disabled previously explicitly
# via `Enabled: false` in .rubocop_todo.yml or .rubocop_todo/.
MAX_OFFENSE_COUNT = 15
class Todo
attr_reader :cop_name, :files, :offense_count
def initialize(cop_name)
@cop_name = cop_name
@files = Set.new
@offense_count = 0
@cop_class = RuboCop::Cop::Registry.global.find_by_cop_name(cop_name)
end
def record(file, offense_count)
@files << file
@offense_count += offense_count
end
def autocorrectable?
@cop_class&.support_autocorrect?
end
end
def initialize(output, options = {})
directory = options.delete(:rubocop_todo_dir) || TodoDir::DEFAULT_TODO_DIR
@todos = Hash.new { |hash, cop_name| hash[cop_name] = Todo.new(cop_name) }
@todo_dir = TodoDir.new(directory)
@config_inspect_todo_dir = load_config_inspect_todo_dir(directory)
@config_old_todo_yml = load_config_old_todo_yml(directory)
check_multiple_configurations!
super
end
def file_finished(file, offenses)
return if offenses.empty?
file = relative_path(file)
offenses.map(&:cop_name).tally.each do |cop_name, offense_count|
@todos[cop_name].record(file, offense_count)
end
end
def finished(_inspected_files)
@todos.values.sort_by(&:cop_name).each do |todo|
yaml = to_yaml(todo)
path = @todo_dir.write(todo.cop_name, yaml)
output.puts "Written to #{relative_path(path)}\n"
end
end
private
def relative_path(path)
parent = File.expand_path('..', @todo_dir.directory)
path.delete_prefix("#{parent}/")
end
def to_yaml(todo)
yaml = []
yaml << '---'
yaml << '# Cop supports --auto-correct.' if todo.autocorrectable?
yaml << "#{todo.cop_name}:"
if previously_disabled?(todo) && offense_count_exceeded?(todo)
yaml << " # Offense count: #{todo.offense_count}"
yaml << ' # Temporarily disabled due to too many offenses'
yaml << ' Enabled: false'
end
yaml << ' Exclude:'
files = todo.files.sort.map { |file| " - '#{file}'" }
yaml.concat files
yaml << ''
yaml.join("\n")
end
def offense_count_exceeded?(todo)
todo.offense_count > MAX_OFFENSE_COUNT
end
def check_multiple_configurations!
cop_names = @config_inspect_todo_dir.keys & @config_old_todo_yml.keys
return if cop_names.empty?
list = cop_names.sort.map { |cop_name| "- #{cop_name}" }.join("\n")
raise "Multiple configurations found for cops:\n#{list}\n"
end
def previously_disabled?(todo)
cop_name = todo.cop_name
config = @config_old_todo_yml[cop_name] ||
@config_inspect_todo_dir[cop_name] || {}
return false if config.empty?
config['Enabled'] == false
end
def load_config_inspect_todo_dir(directory)
@todo_dir.list_inspect.each_with_object({}) do |path, combined|
config = YAML.load_file(path)
combined.update(config) if Hash === config
end
end
# Load YAML configuration from `.rubocop_todo.yml`.
# We consider this file already old, obsolete, and to be removed soon.
def load_config_old_todo_yml(directory)
path = File.expand_path(File.join(directory, '../.rubocop_todo.yml'))
config = YAML.load_file(path) if File.exist?(path)
config || {}
end
end
end
end
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