only write spec if changed

src/download.rs

@@ -291,28 +291,33 @@ pub (crate) fn update_podcast_from_feed(
                                 );
                             }
                         }
+
+                        // Update the file as we go, but only if a change has occured
+                        spec.write_to(&spec_file)?;
                     },
                     Err(err) => {
                         eprintln!(r#"[error] failed to request episode "{}" with error: "{}". skipping"#, title, err);
                         continue;
                     }
                 }
-
-                spec.write_to(&spec_file)?;
             },
         }
     }
 
+    let mut feed_change = false;
     // Setting episodes which have been removed to no longer be current
     for (_, episodes) in &mut spec.feed {
         for episode in episodes {
             if !current_episodes.contains(episode.id.as_ref()) {
                 episode.current = false;
+                feed_change = true;
             }
         }
     }
 
+    if feed_change {
         spec.write_to(&spec_file)?;
+    }
 
     Ok(())
 }