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Versions: 35
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Contents
# frozen_string_literal: true
require 'yaml'
require 'active_support/core_ext/hash'
module Checkoff
module Internal
# Use the provided config from a YAML file, and fall back to env
# variable if it's not populated for a key'
class EnvFallbackConfigLoader
def initialize(config, sym, yaml_filename)
@config = config
@envvar_prefix = sym.upcase
@yaml_filename = yaml_filename
end
def [](key)
config_value = @config[key]
return config_value unless config_value.nil?
ENV.fetch(envvar_name(key), nil)
end
def fetch(key)
out = self[key]
return out unless out.nil?
raise KeyError,
"Please configure either the #{key} key in #{@yaml_filename} or set #{envvar_name(key)}"
end
private
def envvar_name(key)
"#{@envvar_prefix}__#{key.upcase}"
end
end
# Load configuration file
class ConfigLoader
class << self
def load(sym)
yaml_result = load_yaml_file(sym)
EnvFallbackConfigLoader.new(yaml_result, sym, yaml_filename(sym))
end
private
def load_yaml_file(sym)
filename = yaml_filename(sym)
return {} unless File.exist?(filename)
YAML.load_file(filename).with_indifferent_access
end
def yaml_filename(sym)
file = "#{sym}.yml"
File.expand_path("~/.#{file}")
end
end
end
end
end
Version data entries
35 entries across 35 versions & 1 rubygems