Refactored main.go into cmd/jobsearch/main.go (in case separate commands are introduced later) which has required the options mechanism to change slightly as well as the logging.

internal/log/logging.go

@@ -26,24 +26,11 @@ import (
 )
 
 var logLevel slog.LevelVar
+var fileLogger *os.File
 
-// Set up the logger using defaults
-func Init() {
-	logLevel.Set(slog.LevelWarn)
-	opts := &slog.HandlerOptions{
-		Level: &logLevel,
-	}
-	handler := slog.NewTextHandler(os.Stdout, opts)
-	logger := slog.New(handler)
-	slog.SetDefault(logger)
-}
-
-// Enable info level logging
-func EnableInfo() {
-	if logLevel.Level() > slog.LevelInfo {
-		logLevel.Set(slog.LevelInfo)
-		slog.Info("Info logging enabled")
-	}
+// Set the logging to a particular level, quietly
+func SetLevel(level slog.Level) {
+	logLevel.Set(level)
 }
 
 // Enable debug level logging
@@ -54,6 +41,36 @@ func EnableDebug() {
 	}
 }
 
+func LogToFile(logfile string) error {
+	if fileLogger != nil {
+		(*fileLogger).Close()
+	}
+
+	// Open the log file
+	fileLogger, err := os.OpenFile(logfile, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
+	if err != nil {
+		return err
+	}
+
+	opts := &slog.HandlerOptions{
+		Level: &logLevel,
+	}
+	handler := slog.NewJSONHandler(fileLogger, opts)
+	logger := slog.New(handler)
+	slog.SetDefault(logger)
+
+	return nil
+}
+
+func Shutdown() error {
+	var err error = nil
+	if fileLogger != nil {
+		err = (*fileLogger).Close()
+		fileLogger = nil
+	}
+	return err
+}
+
 func LogToTerminal() {
 	opts := &tint.Options{
 		Level:      &logLevel,
@@ -94,3 +111,11 @@ func IsJSONHandler(h slog.Handler) bool {
 	// Read the boolean value using unsafe
 	return *(*bool)(unsafe.Pointer(jsonField.UnsafeAddr()))
 }
+
+func IsFileLogger() bool {
+	return fileLogger != nil
+}
+
+func IsDebugEnabled() bool {
+	return logLevel.Level() <= slog.LevelDebug
+}