Merge branch 'master' into 2020-05-27-check-data-space-map

src/file_utils.rs

@@ -0,0 +1,8 @@
+use std::fs;
+
+pub fn file_exists(path: &str) -> bool {
+    return match fs::metadata(path) {
+        Ok(_) => {true}
+        Err(_) => {false}
+    }
+}