Baguette::Configuration.

src/baguette-crystal-base.cr

@@ -1,9 +1,46 @@
 require "colorize"
+require "yaml"
 
 class Baguette::Context
 	class_property verbosity = 1
 end
 
+class Baguette::Configuration
+	class Base
+		include YAML::Serializable
+
+		# Check for provided file first,
+		# then $XDG_CONFIG_HOME/<class>.yml,
+		# then /etc/baguette/<class>.yml.
+		def self.get(file : String?)
+			filename = "/" + (self.name.downcase.gsub /baguette::configuration::/, "") + ".yml"
+			directory = "/baguette"
+
+			suffix = "#{directory}#{filename}"
+			user_configuration   = (ENV["XDG_CONFIG_HOME"]? || "~/.config") + suffix
+			system_configuration = "/etc#{suffix}"
+
+			if ! file.nil? && ! File.exists? file.not_nil!
+				Baguette::Log.warning "Provided configuration file does not exist: #{file}"
+			end
+
+			if ! file.nil? && File.exists? file.not_nil!
+				Baguette::Log.info "Using configuration file: #{file}"
+				self.from_yaml File.read(file.not_nil!)
+			elsif File.exists? user_configuration
+				Baguette::Log.info "Using user configuration: #{user_configuration}"
+				self.from_yaml File.read(user_configuration)
+			elsif File.exists? user_configuration
+				Baguette::Log.info "Using system configuration: #{system_configuration}"
+				self.from_yaml File.read(system_configuration)
+			else
+				Baguette::Log.warning "No configuration found"
+				nil
+			end
+		end
+	end
+end
+
 class Baguette::Log
 	# FIXME: Use log files.
 	# FIXME: def log(), that puts stuff as-is in the logs.