feat: logging

enable standard logging

PlantUMLFramework/Sources/PlantUMLFramework/FileManagement/FileCollector.swift

@@ -21,7 +21,7 @@ public struct FileCollector {
 
         if let include = fileOptions?.include, !include.isEmpty {
             searchPaths = ["."]
-            Logger.shared.info("paths will be ignored in favor of configuration (files:include: \(include.joined(separator: ", ")))")
+            logger.info("paths will be ignored in favor of configuration (files:include: \(include.joined(separator: ", ")))")
         }
 
         let allFiles = getFiles(for: searchPaths, in: directory)

PlantUMLFramework/Sources/PlantUMLFramework/Logging/Logger.swift

@@ -1,78 +1,5 @@
 import Foundation
+import OSLog
 
-/// A log level can be used to make logging conditional, e.g. only errors with log level `error` but log infos, warning and errors with log level `info`
-public enum LogLevel: Comparable {
-    /// error
-    case error
-    /// warning
-    case warning
-    /// info
-    case info
-    /// debug
-    case debug
-}
+public let logger = Logger(subsystem: "org.bsc.PlantUML", category: "main")
 
-/// common interface for Loggers
-public protocol Logging {
-    /// log an error
-    /// - Parameters:
-    ///   - message: to be logged
-    ///   - file: in which the message occurred
-    ///   - function: in wich the message occurred
-    ///   - line: line number in which the message occurred
-    /// - Parameter message: to be logged
-    func error(_ message: String, _ file: String, _ function: String, _ line: Int)
-
-    /// log a warning
-    /// - Parameters:
-    ///   - message: to be logged
-    ///   - file: in which the message occurred
-    ///   - function: in wich the message occurred
-    ///   - line: line number in which the message occurred
-    func warning(_ message: String, _ file: String, _ function: String, _ line: Int)
-
-    /// log an info
-    /// - Parameters:
-    ///   - message: to be logged
-    ///   - file: in which the message occurred
-    ///   - function: in wich the message occurred
-    ///   - line: line number in which the message occurred
-    func info(_ message: String, _ file: String, _ function: String, _ line: Int)
-
-    /// log debugging-related info
-    /// - Parameters:
-    ///   - message: to be logged
-    ///   - file: in which the message occurred
-    ///   - function: in wich the message occurred
-    ///   - line: line number in which the message occurred
-    func debug(_ message: String, _ file: String, _ function: String, _ line: Int)
-}
-
-/// :nodoc:
-public extension Logging {
-    /// :nodoc:
-    func error(_ message: String, _ file: String = #file, _ function: String = #function, _ line: Int = #line) {
-        error(message, file, function, line)
-    }
-
-    /// :nodoc:
-    func warning(_ message: String, _ file: String = #file, _ function: String = #function, _ line: Int = #line) {
-        warning(message, file, function, line)
-    }
-
-    /// :nodoc:
-    func info(_ message: String, _ file: String = #file, _ function: String = #function, _ line: Int = #line) {
-        info(message, file, function, line)
-    }
-
-    /// :nodoc:
-    func debug(_ message: String, _ file: String = #file, _ function: String = #function, _ line: Int = #line) {
-        debug(message, file, function, line)
-    }
-}
-
-/// :nodoc:
-public enum Logger {
-    /// singleton to access logger througout the SwiftPlantUMLFramework
-    public static var shared: Logging = NoLogger()
-}

PlantUMLFramework/Sources/PlantUMLFramework/PlantUMLScript.swift

@@ -60,7 +60,7 @@ public struct PlantUMLScript : CustomStringConvertible {
             @enduml            
             """
 
-        Logger.shared.debug("PlantUML script created in \(Date().timeIntervalSince(methodStart)) seconds")
+        logger.trace("PlantUML script created in \(Date().timeIntervalSince(methodStart)) seconds")
     }
 
     /**