From c833db9c9728382aed747313e2718622b2305b42 Mon Sep 17 00:00:00 2001
From: Evan You <yyx990803@gmail.com>
Date: Tue, 3 Sep 2019 20:51:42 -0400
Subject: [PATCH] feat: production tip

---
 packages/global.d.ts      |  5 ++++-
 packages/vue/src/index.ts |  7 +++++++
 rollup.config.js          | 17 ++++++++++++-----
 3 files changed, 23 insertions(+), 6 deletions(-)

diff --git a/packages/global.d.ts b/packages/global.d.ts
index f8229262..60adb645 100644
--- a/packages/global.d.ts
+++ b/packages/global.d.ts
@@ -1,4 +1,7 @@
 // Global compile-time constants
 declare var __DEV__: boolean
-declare var __COMPAT__: boolean
 declare var __JSDOM__: boolean
+
+// Feature flags
+declare var __FEATURE_OPTIONS__: boolean
+declare var __FEATURE_PRODUCTION_TIP__: boolean
diff --git a/packages/vue/src/index.ts b/packages/vue/src/index.ts
index d9dd498d..e7bc46d2 100644
--- a/packages/vue/src/index.ts
+++ b/packages/vue/src/index.ts
@@ -1,3 +1,10 @@
 // TODO this package will be the "full-build" that includes both the runtime
 // and the compiler
 export * from '@vue/runtime-dom'
+
+if (__FEATURE_PRODUCTION_TIP__) {
+  console[console.info ? 'info' : 'log'](
+    `You are running a development build of Vue.\n` +
+      `Make sure to use the production build (*.prod.js) when deploying for production.`
+  )
+}
diff --git a/rollup.config.js b/rollup.config.js
index 0c9bc1d1..3f530bbc 100644
--- a/rollup.config.js
+++ b/rollup.config.js
@@ -75,7 +75,6 @@ function createConfig(output, plugins = []) {
   const isGlobalBuild = /\.global(\.prod)?\.js$/.test(output.file)
   const isBunlderESMBuild = /\.esm\.js$/.test(output.file)
   const isBrowserESMBuild = /esm-browser(\.prod)?\.js$/.test(output.file)
-  const isCompat = /dist\/vue\./.test(output.file)
 
   if (isGlobalBuild) {
     output.name = packageOptions.name
@@ -112,7 +111,11 @@ function createConfig(output, plugins = []) {
     plugins: [
       tsPlugin,
       aliasPlugin,
-      createReplacePlugin(isProductionBuild, isBunlderESMBuild, isCompat),
+      createReplacePlugin(
+        isProductionBuild,
+        isBunlderESMBuild,
+        isGlobalBuild || isBrowserESMBuild
+      ),
       ...plugins
     ],
     output,
@@ -124,15 +127,19 @@ function createConfig(output, plugins = []) {
   }
 }
 
-function createReplacePlugin(isProduction, isBunlderESMBuild, isCompat) {
+function createReplacePlugin(isProduction, isBunlderESMBuild, isBrowserBuild) {
   return replace({
     __DEV__: isBunlderESMBuild
       ? // preserve to be handled by bundlers
         `process.env.NODE_ENV !== 'production'`
       : // hard coded dev/prod builds
         !isProduction,
-    // compatibility builds
-    __COMPAT__: !!packageOptions.compat,
+    // show production tip?
+    // should only do this for dev AND browser-targeting builds.
+    __FEATURE_PRODUCTION_TIP__: !isProduction && isBrowserBuild,
+    // support options?
+    // the lean build drops options related code with buildOptions.lean: true
+    __FEATURE_OPTIONS__: !packageOptions.lean,
     // this is only used during tests
     __JSDOM__: false
   })