detect resume files correctly in download_creations_pages_from_checkpoint

src/main.rs

@@ -1182,15 +1182,34 @@ async fn download_creations_pages_from_checkpoint(context:&CookieContext,owner:r
 
 	let (mut asset_list,mut config)=if continue_from_cursor{
 		// load state from files
-		let (versions,cursor)=tokio::try_join!(
+		let (versions,cursor)=tokio::join!(
 			tokio::fs::read(versions_path.as_path()),
 			tokio::fs::read_to_string(cursor_path.as_path()),
-		)?;
+		);
+		// allow versions to not exist
+		let (versions,cursor)=match (versions,cursor){
+			// continue downloading
+			(Ok(versions),Ok(cursor))=>(serde_json::from_slice(&versions)?,Some(cursor)),
+			// already downloaded
+			(Ok(versions),Err(e)) if matches!(e.kind(),std::io::ErrorKind::NotFound)=>return Ok(serde_json::from_slice(&versions)?),
+			// not downloaded
+			(Err(e),result) if matches!(e.kind(),std::io::ErrorKind::NotFound)=>{
+				match result{
+					Ok(_)=>{},
+					Err(e) if matches!(e.kind(),std::io::ErrorKind::NotFound)=>{},
+					Err(e)=>Err(e)?,
+				}
+				(Vec::new(),None)
+			},
+			// other errors
+			(Ok(_),Err(e))=>Err(e)?,
+			(Err(e),_)=>Err(e)?,
+		};
 		(
-			serde_json::from_slice(&versions)?,
+			versions,
 			rbx_asset::cookie::CreationsPageRequest{
 				owner,
-				cursor:Some(cursor),
+				cursor,
 			}
 		)
 	}else{