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Contents
# frozen_string_literal: true
#
# Copyright:: 2019, Chef Software, Inc.
# Author:: Tim Smith (<tsmith@chef.io>)
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
module RuboCop
module Cop
module Chef
module ChefModernize
# Use ::File.exist?('/foo/bar') instead of the slower 'test -f /foo/bar' which requires shelling out
#
# @example
#
# # bad
# only_if 'test -f /bin/foo'
#
# # good
# only_if { ::File.exist?('bin/foo') }
#
class ConditionalUsingTest < Cop
MSG = "Use ::File.exist?('/foo/bar') instead of the slower 'test -f /foo/bar' which requires shelling out"
def_node_matcher :resource_conditional?, <<~PATTERN
(send nil? {:not_if :only_if} $str )
PATTERN
def on_send(node)
resource_conditional?(node) do |conditional|
add_offense(node, location: :expression, message: MSG, severity: :refactor) if conditional.value.match?(/^test -[ef] \S*$/)
end
end
def autocorrect(node)
lambda do |corrector|
resource_conditional?(node) do |conditional|
new_string = "{ ::File.exist?('#{conditional.value.match(/^test -[ef] (\S*)$/)[1]}') }"
corrector.replace(conditional.loc.expression, new_string)
end
end
end
end
end
end
end
end
Version data entries
6 entries across 6 versions & 1 rubygems