Added more stuff

shared/files.go

@@ -0,0 +1,22 @@
+package shared
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+func FileNameWithoutExt(fileName string) string {
+	return strings.TrimSuffix(fileName, filepath.Ext(fileName))
+}
+
+func FileExists(filePath string) (bool, error) {
+	info, err := os.Stat(filePath)
+	if err == nil {
+		return !info.IsDir(), nil
+	}
+	if os.IsNotExist(err) {
+		return false, nil
+	}
+	return false, err
+}