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Contents
# frozen_string_literal: true
module ActiveSupport
# Reads a YAML configuration file, evaluating any ERB, then
# parsing the resulting YAML.
#
# Warns in case of YAML confusing characters, like invisible
# non-breaking spaces.
class ConfigurationFile # :nodoc:
class FormatError < StandardError; end
def initialize(content_path)
@content_path = content_path.to_s
@content = read content_path
end
def self.parse(content_path, **options)
new(content_path).parse(**options)
end
def parse(context: nil, **options)
source = render(context)
if YAML.respond_to?(:unsafe_load)
YAML.unsafe_load(source, **options) || {}
else
YAML.load(source, **options) || {}
end
rescue Psych::SyntaxError => error
raise "YAML syntax error occurred while parsing #{@content_path}. " \
"Please note that YAML must be consistently indented using spaces. Tabs are not allowed. " \
"Error: #{error.message}"
end
private
def read(content_path)
require "yaml"
require "erb"
File.read(content_path).tap do |content|
if content.include?("\u00A0")
warn "#{content_path} contains invisible non-breaking spaces, you may want to remove those"
end
end
end
def render(context)
erb = ERB.new(@content).tap { |e| e.filename = @content_path }
context ? erb.result(context) : erb.result
end
end
end
Version data entries
73 entries across 69 versions & 10 rubygems