Report failures to enumerate output paths

ofborg/src/outpathdiff.rs

@@ -52,31 +52,35 @@ impl OutPathDiff {
         return result;
     }
 
-    pub fn find_before(&mut self) {
+    pub fn find_before(&mut self) -> bool {
         let x = self.run();
         match x {
             Ok(f) => {
-                self.original = Some(self.parse(f))
+                self.original = Some(self.parse(f));
+                return true;
             }
             Err(_) => {
                 info!("Failed to find Before list");
+                return false;
             }
         }
     }
 
-    pub fn find_after(&mut self) {
+    pub fn find_after(&mut self) -> bool {
         if self.original == None {
             debug!("Before is None, not bothering with After");
-            return
+            return false;
         }
 
         let x = self.run();
         match x {
             Ok(f) => {
-                self.current = Some(self.parse(f))
+                self.current = Some(self.parse(f));
+                return true;
             }
             Err(_) => {
                 info!("Failed to find After list");
+                return false;
             }
         }
     }

ofborg/src/tasks/massrebuilder.rs

@@ -109,7 +109,13 @@ impl worker::SimpleWorker for MassRebuildWorker {
             hubcaps::statuses::State::Pending
         );
 
-        rebuildsniff.find_before();
+        if !rebuildsniff.find_before() {
+            overall_status.set_with_description(
+                format!("Failed to enumerate outputs of {}", &target_branch).as_ref(),
+                hubcaps::statuses::State::Failure
+            );
+            return self.actions().skip(&job);
+        }
 
         overall_status.set_with_description(
             "Fetching PR",
@@ -155,7 +161,13 @@ impl worker::SimpleWorker for MassRebuildWorker {
             hubcaps::statuses::State::Pending
         );
 
-        rebuildsniff.find_after();
+        if !rebuildsniff.find_after() {
+            overall_status.set_with_description(
+                format!("Failed to enumerate outputs after merging to ", &target_branch).as_ref(),
+                hubcaps::statuses::State::Failure
+            );
+            return self.actions().skip(&job);
+        }
 
         println!("Got path: {:?}, building", refpath);
         overall_status.set_with_description(