Add back accidentally removed API (#152)

Motivation:

- When `source:` was added in #135, the API was accidentally broken
  despite source compatability.

Modifications:

- Add back source-less API calls which defer to the decls with source.
- Note we can't deprecate the calls we're adding back:
  `log.info("some message")` refers to the implementation we're adding
  back rather and would therefore require users to explicitly specify a source
  to suppress the deprecation warning message.

Result:

- API is no longer broken.

Co-authored-by: Konrad `ktoso` Malawski <ktoso@apple.com>

Sources/Logging/Logging.swift

@@ -81,6 +81,29 @@ extension Logger {
         }
     }
 
+    /// Log a message passing the log level as a parameter.
+    ///
+    /// If the `logLevel` passed to this method is more severe than the `Logger`'s `logLevel`, it will be logged,
+    /// otherwise nothing will happen.
+    ///
+    /// - parameters:
+    ///    - level: The log level to log `message` at. For the available log levels, see `Logger.Level`.
+    ///    - message: The message to be logged. `message` can be used with any string interpolation literal.
+    ///    - metadata: One-off metadata to attach to this log message.
+    ///    - file: The file this log message originates from (there's usually no need to pass it explicitly as it
+    ///            defaults to `#file`).
+    ///    - function: The function this log message originates from (there's usually no need to pass it explicitly as
+    ///                it defaults to `#function`).
+    ///    - line: The line this log message originates from (there's usually no need to pass it explicitly as it
+    ///            defaults to `#line`).
+    @inlinable
+    public func log(level: Logger.Level,
+                    _ message: @autoclosure () -> Logger.Message,
+                    metadata: @autoclosure () -> Logger.Metadata? = nil,
+                    file: String = #file, function: String = #function, line: UInt = #line) {
+        self.log(level: level, message(), metadata: metadata(), source: nil, file: file, function: function, line: line)
+    }
+
     /// Add, change, or remove a logging metadata item.
     ///
     /// - note: Logging metadata behaves as a value that means a change to the logging metadata will only affect the
@@ -137,6 +160,25 @@ extension Logger {
         self.log(level: .trace, message(), metadata: metadata(), source: source(), file: file, function: function, line: line)
     }
 
+    /// If `.trace` is at least as severe as the `Logger`'s `logLevel`, it will be logged,
+    /// otherwise nothing will happen.
+    ///
+    /// - parameters:
+    ///    - message: The message to be logged. `message` can be used with any string interpolation literal.
+    ///    - metadata: One-off metadata to attach to this log message
+    ///    - file: The file this log message originates from (there's usually no need to pass it explicitly as it
+    ///            defaults to `#file`).
+    ///    - function: The function this log message originates from (there's usually no need to pass it explicitly as
+    ///                it defaults to `#function`).
+    ///    - line: The line this log message originates from (there's usually no need to pass it explicitly as it
+    ///            defaults to `#line`).
+    @inlinable
+    public func trace(_ message: @autoclosure () -> Logger.Message,
+                      metadata: @autoclosure () -> Logger.Metadata? = nil,
+                      file: String = #file, function: String = #function, line: UInt = #line) {
+        self.trace(message(), metadata: metadata(), source: nil, file: file, line: line)
+    }
+
     /// Log a message passing with the `Logger.Level.debug` log level.
     ///
     /// If `.debug` is at least as severe as the `Logger`'s `logLevel`, it will be logged,
@@ -161,6 +203,27 @@ extension Logger {
         self.log(level: .debug, message(), metadata: metadata(), source: source(), file: file, function: function, line: line)
     }
 
+    /// Log a message passing with the `Logger.Level.debug` log level.
+    ///
+    /// If `.debug` is at least as severe as the `Logger`'s `logLevel`, it will be logged,
+    /// otherwise nothing will happen.
+    ///
+    /// - parameters:
+    ///    - message: The message to be logged. `message` can be used with any string interpolation literal.
+    ///    - metadata: One-off metadata to attach to this log message.
+    ///    - file: The file this log message originates from (there's usually no need to pass it explicitly as it
+    ///            defaults to `#file`).
+    ///    - function: The function this log message originates from (there's usually no need to pass it explicitly as
+    ///                it defaults to `#function`).
+    ///    - line: The line this log message originates from (there's usually no need to pass it explicitly as it
+    ///            defaults to `#line`).
+    @inlinable
+    public func debug(_ message: @autoclosure () -> Logger.Message,
+                      metadata: @autoclosure () -> Logger.Metadata? = nil,
+                      file: String = #file, function: String = #function, line: UInt = #line) {
+        self.debug(message(), metadata: metadata(), source: nil, file: file, function: function, line: line)
+    }
+
     /// Log a message passing with the `Logger.Level.info` log level.
     ///
     /// If `.info` is at least as severe as the `Logger`'s `logLevel`, it will be logged,
@@ -185,6 +248,27 @@ extension Logger {
         self.log(level: .info, message(), metadata: metadata(), source: source(), file: file, function: function, line: line)
     }
 
+    /// Log a message passing with the `Logger.Level.info` log level.
+    ///
+    /// If `.info` is at least as severe as the `Logger`'s `logLevel`, it will be logged,
+    /// otherwise nothing will happen.
+    ///
+    /// - parameters:
+    ///    - message: The message to be logged. `message` can be used with any string interpolation literal.
+    ///    - metadata: One-off metadata to attach to this log message.
+    ///    - file: The file this log message originates from (there's usually no need to pass it explicitly as it
+    ///            defaults to `#file`).
+    ///    - function: The function this log message originates from (there's usually no need to pass it explicitly as
+    ///                it defaults to `#function`).
+    ///    - line: The line this log message originates from (there's usually no need to pass it explicitly as it
+    ///            defaults to `#line`).
+    @inlinable
+    public func info(_ message: @autoclosure () -> Logger.Message,
+                     metadata: @autoclosure () -> Logger.Metadata? = nil,
+                     file: String = #file, function: String = #function, line: UInt = #line) {
+        self.info(message(), metadata: metadata(), source: nil, file: file, function: function, line: line)
+    }
+
     /// Log a message passing with the `Logger.Level.notice` log level.
     ///
     /// If `.notice` is at least as severe as the `Logger`'s `logLevel`, it will be logged,
@@ -209,6 +293,29 @@ extension Logger {
         self.log(level: .notice, message(), metadata: metadata(), source: source(), file: file, function: function, line: line)
     }
 
+    /// Log a message passing with the `Logger.Level.notice` log level.
+    ///
+    /// If `.notice` is at least as severe as the `Logger`'s `logLevel`, it will be logged,
+    /// otherwise nothing will happen.
+    ///
+    /// - parameters:
+    ///    - message: The message to be logged. `message` can be used with any string interpolation literal.
+    ///    - metadata: One-off metadata to attach to this log message.
+    ///    - source: The source this log messages originates to. Currently, it defaults to the folder containing the
+    ///              file that is emitting the log message, which usually is the module.
+    ///    - file: The file this log message originates from (there's usually no need to pass it explicitly as it
+    ///            defaults to `#file`).
+    ///    - function: The function this log message originates from (there's usually no need to pass it explicitly as
+    ///                it defaults to `#function`).
+    ///    - line: The line this log message originates from (there's usually no need to pass it explicitly as it
+    ///            defaults to `#line`).
+    @inlinable
+    public func notice(_ message: @autoclosure () -> Logger.Message,
+                       metadata: @autoclosure () -> Logger.Metadata? = nil,
+                       file: String = #file, function: String = #function, line: UInt = #line) {
+        self.notice(message(), metadata: metadata(), source: nil, file: file, function: function, line: line)
+    }
+
     /// Log a message passing with the `Logger.Level.warning` log level.
     ///
     /// If `.warning` is at least as severe as the `Logger`'s `logLevel`, it will be logged,
@@ -233,6 +340,27 @@ extension Logger {
         self.log(level: .warning, message(), metadata: metadata(), source: source(), file: file, function: function, line: line)
     }
 
+    /// Log a message passing with the `Logger.Level.warning` log level.
+    ///
+    /// If `.warning` is at least as severe as the `Logger`'s `logLevel`, it will be logged,
+    /// otherwise nothing will happen.
+    ///
+    /// - parameters:
+    ///    - message: The message to be logged. `message` can be used with any string interpolation literal.
+    ///    - metadata: One-off metadata to attach to this log message.
+    ///    - file: The file this log message originates from (there's usually no need to pass it explicitly as it
+    ///            defaults to `#file`).
+    ///    - function: The function this log message originates from (there's usually no need to pass it explicitly as
+    ///                it defaults to `#function`).
+    ///    - line: The line this log message originates from (there's usually no need to pass it explicitly as it
+    ///            defaults to `#line`).
+    @inlinable
+    public func warning(_ message: @autoclosure () -> Logger.Message,
+                        metadata: @autoclosure () -> Logger.Metadata? = nil,
+                        file: String = #file, function: String = #function, line: UInt = #line) {
+        self.warning(message(), metadata: metadata(), source: nil, file: file, function: function, line: line)
+    }
+
     /// Log a message passing with the `Logger.Level.error` log level.
     ///
     /// If `.error` is at least as severe as the `Logger`'s `logLevel`, it will be logged,
@@ -257,6 +385,27 @@ extension Logger {
         self.log(level: .error, message(), metadata: metadata(), source: source(), file: file, function: function, line: line)
     }
 
+    /// Log a message passing with the `Logger.Level.error` log level.
+    ///
+    /// If `.error` is at least as severe as the `Logger`'s `logLevel`, it will be logged,
+    /// otherwise nothing will happen.
+    ///
+    /// - parameters:
+    ///    - message: The message to be logged. `message` can be used with any string interpolation literal.
+    ///    - metadata: One-off metadata to attach to this log message.
+    ///    - file: The file this log message originates from (there's usually no need to pass it explicitly as it
+    ///            defaults to `#file`).
+    ///    - function: The function this log message originates from (there's usually no need to pass it explicitly as
+    ///                it defaults to `#function`).
+    ///    - line: The line this log message originates from (there's usually no need to pass it explicitly as it
+    ///            defaults to `#line`).
+    @inlinable
+    public func error(_ message: @autoclosure () -> Logger.Message,
+                      metadata: @autoclosure () -> Logger.Metadata? = nil,
+                      file: String = #file, function: String = #function, line: UInt = #line) {
+        self.error(message(), metadata: metadata(), source: nil, file: file, function: function, line: line)
+    }
+
     /// Log a message passing with the `Logger.Level.critical` log level.
     ///
     /// `.critical` messages will always be logged.
@@ -279,6 +428,28 @@ extension Logger {
                          file: String = #file, function: String = #function, line: UInt = #line) {
         self.log(level: .critical, message(), metadata: metadata(), source: source(), file: file, function: function, line: line)
     }
+
+    /// Log a message passing with the `Logger.Level.critical` log level.
+    ///
+    /// `.critical` messages will always be logged.
+    ///
+    /// - parameters:
+    ///    - message: The message to be logged. `message` can be used with any string interpolation literal.
+    ///    - metadata: One-off metadata to attach to this log message.
+    ///    - source: The source this log messages originates to. Currently, it defaults to the folder containing the
+    ///              file that is emitting the log message, which usually is the module.
+    ///    - file: The file this log message originates from (there's usually no need to pass it explicitly as it
+    ///            defaults to `#file`).
+    ///    - function: The function this log message originates from (there's usually no need to pass it explicitly as
+    ///                it defaults to `#function`).
+    ///    - line: The line this log message originates from (there's usually no need to pass it explicitly as it
+    ///            defaults to `#line`).
+    @inlinable
+    public func critical(_ message: @autoclosure () -> Logger.Message,
+                         metadata: @autoclosure () -> Logger.Metadata? = nil,
+                         file: String = #file, function: String = #function, line: UInt = #line) {
+        self.critical(message(), metadata: metadata(), source: nil, file: file, function: function, line: line)
+    }
 }
 
 /// The `LoggingSystem` is a global facility where the default logging backend implementation (`LogHandler`) can be

Tests/LoggingTests/LoggingTest+XCTest.swift

@@ -39,6 +39,8 @@ extension LoggingTest {
             ("testCustomFactory", testCustomFactory),
             ("testAllLogLevelsExceptCriticalCanBeBlocked", testAllLogLevelsExceptCriticalCanBeBlocked),
             ("testAllLogLevelsWork", testAllLogLevelsWork),
+            ("testAllLogLevelByFunctionRefWithSource", testAllLogLevelByFunctionRefWithSource),
+            ("testAllLogLevelByFunctionRefWithoutSource", testAllLogLevelByFunctionRefWithoutSource),
             ("testLogMessageWithStringInterpolation", testLogMessageWithStringInterpolation),
             ("testLoggingAString", testLoggingAString),
             ("testMultiplexerIsValue", testMultiplexerIsValue),

Tests/LoggingTests/LoggingTest.swift

@@ -408,6 +408,70 @@ class LoggingTest: XCTestCase {
         testLogging.history.assertExist(level: .critical, message: "yes: critical")
     }
 
+    func testAllLogLevelByFunctionRefWithSource() {
+        let testLogging = TestLogging()
+        LoggingSystem.bootstrapInternal(testLogging.make)
+
+        var logger = Logger(label: "\(#function)")
+        logger.logLevel = .trace
+
+        let trace = logger.trace(_:metadata:source:file:function:line:)
+        let debug = logger.debug(_:metadata:source:file:function:line:)
+        let info = logger.info(_:metadata:source:file:function:line:)
+        let notice = logger.notice(_:metadata:source:file:function:line:)
+        let warning = logger.warning(_:metadata:source:file:function:line:)
+        let error = logger.error(_:metadata:source:file:function:line:)
+        let critical = logger.critical(_:metadata:source:file:function:line:)
+
+        trace("yes: trace", [:], "foo", #file, #function, #line)
+        debug("yes: debug", [:], "foo", #file, #function, #line)
+        info("yes: info", [:], "foo", #file, #function, #line)
+        notice("yes: notice", [:], "foo", #file, #function, #line)
+        warning("yes: warning", [:], "foo", #file, #function, #line)
+        error("yes: error", [:], "foo", #file, #function, #line)
+        critical("yes: critical", [:], "foo", #file, #function, #line)
+
+        testLogging.history.assertExist(level: .trace, message: "yes: trace", source: "foo")
+        testLogging.history.assertExist(level: .debug, message: "yes: debug", source: "foo")
+        testLogging.history.assertExist(level: .info, message: "yes: info", source: "foo")
+        testLogging.history.assertExist(level: .notice, message: "yes: notice", source: "foo")
+        testLogging.history.assertExist(level: .warning, message: "yes: warning", source: "foo")
+        testLogging.history.assertExist(level: .error, message: "yes: error", source: "foo")
+        testLogging.history.assertExist(level: .critical, message: "yes: critical", source: "foo")
+    }
+
+    func testAllLogLevelByFunctionRefWithoutSource() {
+        let testLogging = TestLogging()
+        LoggingSystem.bootstrapInternal(testLogging.make)
+
+        var logger = Logger(label: "\(#function)")
+        logger.logLevel = .trace
+
+        let trace = logger.trace(_:metadata:file:function:line:)
+        let debug = logger.debug(_:metadata:file:function:line:)
+        let info = logger.info(_:metadata:file:function:line:)
+        let notice = logger.notice(_:metadata:file:function:line:)
+        let warning = logger.warning(_:metadata:file:function:line:)
+        let error = logger.error(_:metadata:file:function:line:)
+        let critical = logger.critical(_:metadata:file:function:line:)
+
+        trace("yes: trace", [:], #file, #function, #line)
+        debug("yes: debug", [:], #file, #function, #line)
+        info("yes: info", [:], #file, #function, #line)
+        notice("yes: notice", [:], #file, #function, #line)
+        warning("yes: warning", [:], #file, #function, #line)
+        error("yes: error", [:], #file, #function, #line)
+        critical("yes: critical", [:], #file, #function, #line)
+
+        testLogging.history.assertExist(level: .trace, message: "yes: trace")
+        testLogging.history.assertExist(level: .debug, message: "yes: debug")
+        testLogging.history.assertExist(level: .info, message: "yes: info")
+        testLogging.history.assertExist(level: .notice, message: "yes: notice")
+        testLogging.history.assertExist(level: .warning, message: "yes: warning")
+        testLogging.history.assertExist(level: .error, message: "yes: error")
+        testLogging.history.assertExist(level: .critical, message: "yes: critical")
+    }
+
     func testLogMessageWithStringInterpolation() {
         let testLogging = TestLogging()
         LoggingSystem.bootstrapInternal(testLogging.make)
@@ -733,14 +797,14 @@ class LoggingTest: XCTestCase {
 
         var logger = Logger(label: "test")
         logger.logLevel = .error
-        logger.error(Dummy())
+        logger.error(error: Dummy())
 
         logging.history.assertExist(level: .error, message: "errorDescription")
     }
 }
 
 extension Logger {
-    public func error(_ error: Error,
+    public func error(error: Error,
                       metadata: @autoclosure () -> Logger.Metadata? = nil,
                       file: String = #file, function: String = #function, line: UInt = #line) {
         self.error("\(error.localizedDescription)", metadata: metadata(), file: file, function: function, line: line)