1e56b1d115
Ruby master ships with Psych 4.0.0 which makes `YAML.load` defaults to safe mode (https://github.com/ruby/psych/pull/487). However since these YAML files are trustworthy sources we can parse them with `unsafe_load`.
52 lines
1.5 KiB
Ruby
52 lines
1.5 KiB
Ruby
# frozen_string_literal: true
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module ActiveSupport
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# Reads a YAML configuration file, evaluating any ERB, then
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# parsing the resulting YAML.
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#
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# Warns in case of YAML confusing characters, like invisible
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# non-breaking spaces.
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class ConfigurationFile # :nodoc:
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class FormatError < StandardError; end
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def initialize(content_path)
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@content_path = content_path.to_s
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@content = read content_path
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end
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def self.parse(content_path, **options)
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new(content_path).parse(**options)
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end
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def parse(context: nil, **options)
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source = render(context)
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if YAML.respond_to?(:unsafe_load)
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YAML.unsafe_load(source, **options) || {}
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else
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YAML.load(source, **options) || {}
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end
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rescue Psych::SyntaxError => error
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raise "YAML syntax error occurred while parsing #{@content_path}. " \
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"Please note that YAML must be consistently indented using spaces. Tabs are not allowed. " \
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"Error: #{error.message}"
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end
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private
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def read(content_path)
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require "yaml"
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require "erb"
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File.read(content_path).tap do |content|
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if content.include?("\u00A0")
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warn "#{content_path} contains invisible non-breaking spaces, you may want to remove those"
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end
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end
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end
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def render(context)
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erb = ERB.new(@content).tap { |e| e.filename = @content_path }
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context ? erb.result(context) : erb.result
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end
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end
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end
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