From f0b250a610e90692b7f92e5bb5b71ecc6931ba68 Mon Sep 17 00:00:00 2001
From: Daniel Stockman <daniel.stockman@gmail.com>
Date: Sun, 21 May 2017 13:28:14 -0700
Subject: [PATCH] Make pkg argument optional for lerna diff (#831)

This also hides the progress bar, which is not needed for diff.

Fixes #816
---
 src/commands/DiffCommand.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/commands/DiffCommand.js b/src/commands/DiffCommand.js
index 866a066b69..7d934e1c1d 100644
--- a/src/commands/DiffCommand.js
+++ b/src/commands/DiffCommand.js
@@ -8,7 +8,7 @@ export function handler(argv) {
   return new DiffCommand([argv.pkg], argv).run();
 }
 
-export const command = "diff <pkg>";
+export const command = "diff [pkg]";
 
 export const describe = "Diff all packages or a single package since the last release.";
 
@@ -26,6 +26,9 @@ export default class DiffCommand extends Command {
   initialize(callback) {
     const packageName = this.input[0];
 
+    // don't interrupt spawned or streaming stdio
+    this.logger.disableProgress();
+
     let targetPackage;
 
     if (packageName) {