set current_dir of the metadata command to project path

scouter/src/lib.rs

@@ -48,7 +48,10 @@ impl Project {
     }
     
     fn read_cargo_metadata(&self) -> cargo_metadata::Metadata {
-        cargo_metadata::MetadataCommand::new().exec().expect("metadata call failed")
+        cargo_metadata::MetadataCommand::new()
+            .current_dir(&self.path)
+            .exec()
+            .expect("metadata call failed")
     }
 }