use pastry for createPaste

Summary:
Moving from `arc` to `pastry` to create Pastes.
arc paste is deprecated and throws errors sometimes. Pastry seems to be the tool of choice now and has a nicer API anyways.

Reviewed By: passy

Differential Revision: D10302075

fbshipit-source-id: a846adf3768a2adf5c7ff73dc89b18c1e9169ac0

src/utils/createPaste.js

@@ -7,64 +7,44 @@
 
 import child_process from 'child_process';
 import {clipboard, shell} from 'electron';
+import JSONStream from 'JSONStream';
 
 type PasteResponse =
+  | string
   | {
-      id: number,
-      objectName: string,
-      phid: string,
-      authorPHID: string,
-      filePHID: string,
-      title: string,
-      dateCreated: number,
-      language: string,
-      uri: string,
-      parentPHID: ?number,
-      content: string,
-    }
-  | {
-      type: 'error',
-      message: string,
+      createdPaste: {
+        id: number,
+        url: string,
+      },
     };
 
 export default function createPaste(input: string): Promise<?string> {
   return new Promise((resolve, reject) => {
-    const arc = '/opt/facebook/bin/arc';
-    const child = child_process.spawn(arc, [
-      '--conduit-uri=https://phabricator.intern.facebook.com/api/',
-      'paste',
-      '--json',
-    ]);
+    const child = child_process.spawn('pastry', ['--json']);
+
+    let lastMessage: ?PasteResponse;
+
+    child.stdout
+      .pipe(JSONStream.parse([true]))
+      .on('data', (data: PasteResponse) => {
+        if (typeof data === 'string' && lastMessage === 'error') {
+          new window.Notification('Failed to create paste', {
+            body: data,
+          });
+          reject(data);
+        } else if (typeof data === 'object' && data.createdPaste) {
+          const {url, id} = data.createdPaste;
+          clipboard.writeText(url);
+          const notification = new window.Notification(`Paste P${id} created`, {
+            body: 'URL copied to clipboard',
+          });
+          notification.onclick = () => shell.openExternal(url);
+          resolve(url);
+        }
+        lastMessage = data;
+      });
 
     child.stdin.write(input);
     child.stdin.end();
-    let response = '';
-    child.stdout.on('data', (data: Buffer) => {
-      response += data.toString();
-    });
-    child.stdout.on('end', (data: Buffer) => {
-      const result: PasteResponse = JSON.parse(response || 'null');
-
-      if (!result) {
-        new window.Notification('Failed to create paste', {
-          body: `Does ${arc} exist and is executable?`,
-        });
-      } else if (result.type === 'error') {
-        new window.Notification('Failed to create paste', {
-          body: result.message != null ? result.message : '',
-        });
-        reject(result);
-      } else {
-        clipboard.writeText(result.uri);
-        const notification = new window.Notification(
-          `Paste ${result.objectName} created`,
-          {
-            body: 'URL copied to clipboard',
-          },
-        );
-        notification.onclick = () => shell.openExternal(result.uri);
-        resolve(result.uri);
-      }
-    });
   });
 }