From 77d0817e4e6ed1f1e9089cc409aa28b36886c784 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Hu=C3=A1ng=20J=C3=B9nli=C3=A0ng?= <jlhwung@gmail.com>
Date: Tue, 9 Feb 2021 15:15:03 -0500
Subject: [PATCH 1/2] feat: output previews on repl

---
 packages/babel-node/src/_babel-node.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/packages/babel-node/src/_babel-node.js b/packages/babel-node/src/_babel-node.js
index 405f656ce5f0..a1e5763f8536 100644
--- a/packages/babel-node/src/_babel-node.js
+++ b/packages/babel-node/src/_babel-node.js
@@ -219,6 +219,7 @@ function replStart() {
     output: process.stdout,
     eval: replEval,
     useGlobal: true,
+    preview: true,
   });
 }
 

From db1be542fe8c385961a0ba4e638acebbb34e428a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Hu=C3=A1ng=20J=C3=B9nli=C3=A0ng?= <jlhwung@gmail.com>
Date: Tue, 9 Feb 2021 15:28:36 -0500
Subject: [PATCH 2/2] polish: setup REPL history from NODE_REPL_HISTORY

---
 packages/babel-node/src/_babel-node.js | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/packages/babel-node/src/_babel-node.js b/packages/babel-node/src/_babel-node.js
index a1e5763f8536..19735a5a00c9 100644
--- a/packages/babel-node/src/_babel-node.js
+++ b/packages/babel-node/src/_babel-node.js
@@ -213,7 +213,7 @@ function requireArgs() {
 }
 
 function replStart() {
-  repl.start({
+  const replServer = repl.start({
     prompt: "babel > ",
     input: process.stdin,
     output: process.stdout,
@@ -221,6 +221,11 @@ function replStart() {
     useGlobal: true,
     preview: true,
   });
+  if (process.env.BABEL_8_BREAKING) {
+    replServer.setupHistory(process.env.NODE_REPL_HISTORY, () => {});
+  } else {
+    replServer.setupHistory?.(process.env.NODE_REPL_HISTORY, () => {});
+  }
 }
 
 function replEval(code, context, filename, callback) {