From 53c92d608f84f970ab0fbbf4909c904c60c20061 Mon Sep 17 00:00:00 2001
From: Wesley Wigham <wwigham@gmail.com>
Date: Mon, 22 Apr 2019 13:20:34 -0700
Subject: [PATCH] Add configure-experimental (#31064)

---
 Gulpfile.js                    | 4 ++++
 scripts/configurePrerelease.ts | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/Gulpfile.js b/Gulpfile.js
index 582c07fef3e..bfc4bf43db7 100644
--- a/Gulpfile.js
+++ b/Gulpfile.js
@@ -545,6 +545,10 @@ const configureInsiders = () => exec(process.execPath, ["scripts/configurePrerel
 task("configure-insiders", series(buildScripts, configureInsiders));
 task("configure-insiders").description = "Runs scripts/configurePrerelease.ts to prepare a build for insiders publishing";
 
+const configureExperimental = () => exec(process.execPath, ["scripts/configurePrerelease.js", "experimental", "package.json", "src/compiler/core.ts"])
+task("configure-experimental", series(buildScripts, configureExperimental));
+task("configure-experimental").description = "Runs scripts/configurePrerelease.ts to prepare a build for experimental publishing";
+
 const publishNightly = () => exec("npm", ["publish", "--tag", "next"]);
 task("publish-nightly", series(task("clean"), task("LKG"), task("clean"), task("runtests-parallel"), publishNightly));
 task("publish-nightly").description = "Runs `npm publish --tag next` to create a new nightly build on npm";
diff --git a/scripts/configurePrerelease.ts b/scripts/configurePrerelease.ts
index 93bcc004dea..5e3ac5653d7 100644
--- a/scripts/configurePrerelease.ts
+++ b/scripts/configurePrerelease.ts
@@ -22,7 +22,7 @@ function main(): void {
     }
 
     const tag = args[0];
-    if (tag !== "dev" && tag !== "insiders") {
+    if (tag !== "dev" && tag !== "insiders" && tag !== "experimental") {
         throw new Error(`Unexpected tag name '${tag}'.`);
     }