Source temporary file when running code in Editor (#362)

* Source temporary file when running code in Editor

* Update NEWS.md

NEWS.md

@@ -26,7 +26,9 @@
 
 ## Bug Fixes
 
-* Fix showing content of lazy loaded files in webR demo app editor component #320
+* Fix showing content of lazy loaded files in webR demo app editor component (#320).
+
+* Contents of the code editor in the webR REPL application is now sourced as a temporary file, allowing for input longer than the default R console input buffer length (#326).
 
 * R error conditions raised during evaluation of an `RCall` or `RFunction` object are now re-thrown as JavaScript exceptions.
 

src/repl/components/Editor.tsx

@@ -194,7 +194,11 @@ export function Editor({
         code = utils.getCurrentLineText(editorView);
         utils.moveCursorToNextLine(editorView);
       }
-      webR.writeConsole(code);
+
+      const codeArray = new TextEncoder().encode(code);
+      webR.FS.writeFile('/tmp/.webRtmp-source', codeArray).then(()=>{
+        webR.writeConsole("source('/tmp/.webRtmp-source', echo = TRUE)");
+      });
     };
   }, [editorView]);
 
@@ -214,7 +218,11 @@ export function Editor({
     syncActiveFileState();
     const code = editorView.state.doc.toString();
     terminalInterface.write('\x1b[2K\r');
-    webR.writeConsole(code);
+
+    const codeArray = new TextEncoder().encode(code);
+    webR.FS.writeFile('/tmp/.webRtmp-source', codeArray).then(()=>{
+      webR.writeConsole("source('/tmp/.webRtmp-source', echo = TRUE)");
+    });
   }, [syncActiveFileState, editorView]);
 
   const saveFile: React.MouseEventHandler<HTMLButtonElement> = React.useCallback(() => {