rust: filter workflows by path not name

This logic broke due to commit 42cbccf.
Unintended consequences.

Add error checking for empty vec to next time it raises an error
instead of silently finishing as a no-op.

Author: indygreg

src/github.rs

@@ -130,7 +130,7 @@ pub async fn command_fetch_release_distributions(args: &ArgMatches) -> Result<()
         .into_iter()
         .filter_map(|wf| {
             if matches!(
-                wf.name.as_str(),
+                wf.path.as_str(),
                 ".github/workflows/apple.yml"
                     | ".github/workflows/linux.yml"
                     | ".github/workflows/windows.yml"
@@ -144,6 +144,12 @@ pub async fn command_fetch_release_distributions(args: &ArgMatches) -> Result<()
         })
         .collect::<Vec<_>>();
 
+    if workflow_ids.is_empty() {
+        return Err(anyhow!(
+            "failed to find any workflows; this should not happen"
+        ));
+    }
+
     let mut runs: Vec<octocrab::models::workflows::Run> = vec![];
 
     for workflow_id in workflow_ids {