lib/rubocop/cop/bundler/ordered_gems.rb
# frozen_string_literal: true
module RuboCop
module Cop
module Bundler
# Gems should be alphabetically sorted within groups.
#
# @example
# # bad
# gem 'rubocop'
# gem 'rspec'
#
# # good
# gem 'rspec'
# gem 'rubocop'
#
# # good
# gem 'rubocop'
#
# gem 'rspec'
#
# @example TreatCommentsAsGroupSeparators: true (default)
# # good
# # For code quality
# gem 'rubocop'
# # For tests
# gem 'rspec'
#
# @example TreatCommentsAsGroupSeparators: false
# # bad
# # For code quality
# gem 'rubocop'
# # For tests
# gem 'rspec'
class OrderedGems < Base
extend AutoCorrector
include OrderedGemNode
MSG = 'Gems should be sorted in an alphabetical order within their ' \
'section of the Gemfile. ' \
'Gem `%<previous>s` should appear before `%<current>s`.'
def on_new_investigation
return if processed_source.blank?
gem_declarations(processed_source.ast)
.each_cons(2) do |previous, current|
next unless consecutive_lines(previous, current)
next unless case_insensitive_out_of_order?(gem_name(current), gem_name(previous))
register_offense(previous, current)
end
end
private
def previous_declaration(node)
declarations = gem_declarations(processed_source.ast)
node_index = declarations.map(&:location).find_index(node.location)
declarations.to_a[node_index - 1]
end
# @!method gem_declarations(node)
def_node_search :gem_declarations, <<~PATTERN
(:send nil? :gem str ...)
PATTERN
end
end
end
end