logger: Enable Windows support, properly lock writing to stderr

irc/logger.go

@@ -11,6 +11,9 @@ import (
 
 	"strings"
 
+	"sync"
+
+	colorable "github.com/mattn/go-colorable"
 	"github.com/mgutz/ansi"
 )
 
@@ -49,6 +52,7 @@ var (
 // Logger is the main interface used to log debug/info/error messages.
 type Logger struct {
 	loggers         []SingleLogger
+	stderrWriteLock sync.Mutex
 	DumpingRawInOut bool
 }
 
@@ -66,6 +70,7 @@ func NewLogger(config []LoggingConfig) (*Logger, error) {
 			Level:           logConfig.Level,
 			Types:           logConfig.Types,
 			ExcludedTypes:   logConfig.ExcludedTypes,
+			stderrWriteLock: &logger.stderrWriteLock,
 		}
 		if logConfig.Types["userinput"] || logConfig.Types["useroutput"] || (logConfig.Types["*"] && !(logConfig.ExcludedTypes["userinput"] && logConfig.ExcludedTypes["useroutput"])) {
 			logger.DumpingRawInOut = true
@@ -101,6 +106,7 @@ type fileMethod struct {
 
 // SingleLogger represents a single logger instance.
 type SingleLogger struct {
+	stderrWriteLock *sync.Mutex
 	MethodSTDERR    bool
 	MethodFile      fileMethod
 	Level           LogLevel
@@ -161,7 +167,9 @@ func (logger *SingleLogger) Log(level LogLevel, logType string, messageParts ...
 
 	// output
 	if logger.MethodSTDERR {
-		fmt.Fprintln(os.Stderr, fullStringFormatted)
+		logger.stderrWriteLock.Lock()
+		fmt.Fprintln(colorable.NewColorableStderr(), fullStringFormatted)
+		logger.stderrWriteLock.Unlock()
 	}
 	if logger.MethodFile.Enabled {
 		logger.MethodFile.Writer.WriteString(fullStringRaw + "\n")