From 6a6e8cada0de6687ea534d8f6969a5634ec6f243 Mon Sep 17 00:00:00 2001
From: Lucas Duailibe <lucasds@gmail.com>
Date: Mon, 2 Jul 2018 13:17:08 -0300
Subject: [PATCH] Fix benchmark require (#4792)

---
 src/cli/util.js | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/cli/util.js b/src/cli/util.js
index ac5db69c..497f35b9 100644
--- a/src/cli/util.js
+++ b/src/cli/util.js
@@ -200,11 +200,21 @@ function format(context, input, opt) {
     return { formatted: pp, filepath: opt.filepath || "(stdin)\n" };
   }
 
+  /* istanbul ignore if */
   if (context.argv["debug-benchmark"]) {
+    let benchmark;
+    try {
+      benchmark = eval("require")("benchmark");
+    } catch (err) {
+      context.logger.debug(
+        "'--debug-benchmark' requires the 'benchmark' package to be installed."
+      );
+      process.exit(2);
+    }
     context.logger.debug(
       "'--debug-benchmark' option found, measuring formatWithCursor with 'benchmark' module."
     );
-    const suite = new require("benchmark").Suite();
+    const suite = new benchmark.Suite();
     suite
       .add("format", () => {
         prettier.formatWithCursor(input, opt);