Use contents, not filesystem, to read METADATA.pb

Author: simoncozens

profile-googlefonts/src/metadata.rs

@@ -6,8 +6,8 @@ use fonts_public::FamilyProto;
 use fontspector_checkapi::prelude::*;
 
 fn validate_metadatapb(c: &Testable, _context: &Context) -> CheckFnResult {
-    let mdpb = std::fs::read_to_string(&c.filename)
-        .map_err(|e| CheckError::Error(format!("Couldn't open metadata file: {}", e)))?;
+    let mdpb = std::str::from_utf8(&c.contents)
+        .map_err(|_| CheckError::Error("METADATA.pb is not valid UTF-8".to_string()))?;
     let msg = protobuf::text_format::parse_from_str::<FamilyProto>(&mdpb)
         .map_err(|e| CheckError::Error(format!("Error parsing METADATA.pb: {}", e)))?;
     let mut problems = vec![];