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Contents
# frozen_string_literal: true
module RuboCop
module Cop
module Rails
# This cop checks that environments called with `Rails.env` predicates
# exist.
#
# @example
# # bad
# Rails.env.proudction?
#
# # good
# Rails.env.production?
class UnknownEnv < Cop
include NameSimilarity
MSG = 'Unknown environment `%<name>s`.'.freeze
MSG_SIMILAR = 'Unknown environment `%<name>s`. ' \
'Did you mean `%<similar>s`?'.freeze
def_node_matcher :unknown_environment?, <<-PATTERN
(send
(send
{(const nil? :Rails) (const (cbase) :Rails)}
:env)
$#unknown_env_name?)
PATTERN
def on_send(node)
unknown_environment?(node) do |name|
add_offense(node, location: :selector, message: message(name))
end
end
private
def collect_variable_like_names(_scope)
environments.map { |env| env + '?' }
end
def message(name)
similar = find_similar_name(name.to_s, [])
if similar
format(MSG_SIMILAR, name: name, similar: similar)
else
format(MSG, name: name)
end
end
def unknown_env_name?(name)
name = name.to_s
name.end_with?('?') &&
!environments.include?(name[0..-2])
end
def environments
cop_config['Environments']
end
end
end
end
end
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