Add a logger that auto-includes file+callsite

logger/logger.go

@@ -0,0 +1,42 @@
+package logger
+
+import (
+	"fmt"
+	"log"
+	"path/filepath"
+	"runtime"
+)
+
+// logf logs a message with automatic caller information (file:function)
+func logf(format string, args ...interface{}) {
+	pc, file, _, ok := runtime.Caller(2)
+	if !ok {
+		log.Printf(format, args...)
+		return
+	}
+	
+	fn := runtime.FuncForPC(pc)
+	if fn == nil {
+		log.Printf(format, args...)
+		return
+	}
+	
+	funcName := filepath.Base(fn.Name())
+	fileName := filepath.Base(file)
+	
+	prefix := fmt.Sprintf("%s:%s", fileName, funcName)
+	message := fmt.Sprintf(format, args...)
+	log.Printf("%s %s", prefix, message)
+}
+
+// Printf logs a message with caller information
+func Printf(format string, args ...interface{}) {
+	logf(format, args...)
+}
+
+// Debugf logs a debug message with caller information if debug is true
+func Debugf(debug bool, format string, args ...interface{}) {
+	if debug {
+		logf(format, args...)
+	}
+}