feat(xatu): set CLI exit statuses

src/xatu/xatu_main.rs

@@ -29,11 +29,18 @@ fn is_excluded_dir(path: &Path) -> bool {
 }
 
 fn collect_source_files(path: &Path) -> status::Result<Vec<SourceFile>> {
+    collect_source_files_with_exclusions(path, false)
+}
+
+fn collect_source_files_with_exclusions(
+    path: &Path,
+    exclude_current_dir: bool,
+) -> status::Result<Vec<SourceFile>> {
     let metadata = std::fs::symlink_metadata(path)
         .with_context(|| format!("failed to read metadata for {}", path.display()))?;
 
     if metadata.file_type().is_dir() {
-        if is_excluded_dir(path) {
+        if exclude_current_dir && is_excluded_dir(path) {
             return Ok(Vec::new());
         }
 
@@ -44,7 +51,7 @@ fn collect_source_files(path: &Path) -> status::Result<Vec<SourceFile>> {
         {
             let entry =
                 entry.with_context(|| format!("failed to read entry in {}", path.display()))?;
-            files.extend(collect_source_files(&entry.path())?);
+            files.extend(collect_source_files_with_exclusions(&entry.path(), true)?);
         }
 
         return Ok(files);