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Contents
# frozen_string_literal: true
module UltraSettings
# Helper class to load YAML configuration files. Any ERB markup in the YAML
# file will be evaluated. The YAML file should be structured like this:
#
# ```yaml
# shared:
# foo: bar
# bar: baz
#
# development:
# bar: qux
# biz: buz
#
# test:
# bar: qix
# biz: biz
# ```
#
# The section with the key matching the environment name is merged into
# the shared section. In this example, the development environment would
# have the following configuration:
#
# ```ruby
# {
# "foo" => "bar",
# "bar" => "qux",
# "biz" => "buz"
# }
# ```
#
# In addition, the keys are flattened into a one level deep hash with dots
# separating the keys.
class YamlConfig
def initialize(path, environment)
yaml = load_yaml(path)
@config = environment_config(yaml, environment)
end
def to_h
@config
end
private
def load_yaml(path)
yaml = File.read(path)
if yaml.include?("<%")
yaml = ERB.new(yaml).result
end
hash = YAML.load(yaml) # rubocop:disable Security/YAMLLoad
hash = {} unless hash.is_a?(Hash)
hash
end
def environment_config(yaml, environment)
shared = flatten_hash(yaml.fetch("shared", {}))
env = flatten_hash(yaml.fetch(environment, {}))
shared.merge(env)
end
def flatten_hash(hash, prefix = nil)
hash.each_with_object({}) do |(key, value), result|
key = key.to_s
key = "#{prefix}.#{key}" if prefix
if value.is_a?(Hash)
result.merge!(flatten_hash(value, key))
else
result[key] = value
end
end
end
end
end
Version data entries
15 entries across 15 versions & 1 rubygems