feat(xatu): reject files with parse errors

src/status/status.rs

@@ -10,6 +10,7 @@ pub trait ResultExt<T> {
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub enum Code {
     InvalidArgument,
+    FailedPrecondition,
     NotFound,
     PermissionDenied,
     Internal,
@@ -39,6 +40,10 @@ impl Status {
         Self::new(Code::InvalidArgument, message)
     }
 
+    pub fn failed_precondition(message: impl Into<String>) -> Self {
+        Self::new(Code::FailedPrecondition, message)
+    }
+
     pub fn permission_denied(message: impl Into<String>) -> Self {
         Self::new(Code::PermissionDenied, message)
     }

src/xatu/xatu.rs

@@ -13,6 +13,13 @@ pub fn run(files: Vec<SourceFile>) -> status::Result<()> {
         let file = store.get(file_id);
         let parsed = parser::parse_file(file_id, &file.source);
 
+        if !parsed.errors.is_empty() {
+            return Err(status::Status::failed_precondition(format!(
+                "failed to parse {}",
+                file.path.display()
+            )));
+        }
+
         for diagnostic in rules::run_rules(&parsed) {
             println!(
                 "{}:{}..{}: {}: {}",