WIP

base/log/slog.go

@@ -1,14 +1,19 @@
 package log
 
 import (
+	"io"
 	"log/slog"
 	"os"
 	"runtime"
 
 	"github.com/lmittmann/tint"
+	"github.com/mattn/go-colorable"
+	"github.com/mattn/go-isatty"
 )
 
 func setupSLog(level Severity) {
+	// TODO: Changes in the log level are not yet reflected onto the slog handlers in the modules.
+
 	// Set highest possible level, so it can be changed in runtime.
 	handlerLogLevel := level.toSLogLevel()
 
@@ -17,21 +22,23 @@ func setupSLog(level Severity) {
 	switch runtime.GOOS {
 	case "windows":
 		logHandler = tint.NewHandler(
-			GlobalWriter,
+			windowsColoring(GlobalWriter), // Enable coloring on Windows.
 			&tint.Options{
 				AddSource:  true,
 				Level:      handlerLogLevel,
 				TimeFormat: timeFormat,
-				NoColor:    !GlobalWriter.IsStdout(), // FIXME: also check for tty.
+				NoColor:    !( /* Color: */ GlobalWriter.IsStdout() && isatty.IsTerminal(GlobalWriter.file.Fd())),
 			},
 		)
+
 	case "linux":
 		logHandler = tint.NewHandler(GlobalWriter, &tint.Options{
 			AddSource:  true,
 			Level:      handlerLogLevel,
 			TimeFormat: timeFormat,
-			NoColor:    !GlobalWriter.IsStdout(), // FIXME: also check for tty.
+			NoColor:    !( /* Color: */ GlobalWriter.IsStdout() && isatty.IsTerminal(GlobalWriter.file.Fd())),
 		})
+
 	default:
 		logHandler = tint.NewHandler(os.Stdout, &tint.Options{
 			AddSource:  true,
@@ -43,6 +50,11 @@ func setupSLog(level Severity) {
 
 	// Set as default logger.
 	slog.SetDefault(slog.New(logHandler))
-	// Set actual log level.
-	slog.SetLogLoggerLevel(handlerLogLevel)
+}
+
+func windowsColoring(lw *LogWriter) io.Writer {
+	if lw.IsStdout() {
+		return colorable.NewColorable(lw.file)
+	}
+	return lw
 }