From 1068969a1051bb6ba9bebe84d09d87fa7e653868 Mon Sep 17 00:00:00 2001
From: "Hung-Han (Henry) Chen" <chenhungh@gmail.com>
Date: Wed, 30 Jun 2021 12:02:04 +0300
Subject: [PATCH] Use esbuild loader

Signed-off-by: Hung-Han (Henry) Chen <chenhungh@gmail.com>
---
 src/common/getTSLoader.ts | 63 +++++++++++++++++++++++++++++++++++++++
 webpack.main.ts           | 12 ++------
 webpack.renderer.ts       | 12 ++------
 3 files changed, 67 insertions(+), 20 deletions(-)
 create mode 100644 src/common/getTSLoader.ts

diff --git a/src/common/getTSLoader.ts b/src/common/getTSLoader.ts
new file mode 100644
index 0000000000..6c76770d5d
--- /dev/null
+++ b/src/common/getTSLoader.ts
@@ -0,0 +1,63 @@
+/**
+ * Copyright (c) 2021 OpenLens Authors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+import esbuild from "esbuild";
+
+/**
+ * A function returning webpack ts/tsx loader
+ * 
+ * depends on env LENS_DEV_USE_ESBUILD_LOADER to use esbuild-loader (faster) or good-old ts-loader
+ * 
+ * @param testRegExp - the regex for webpack to conditional find the files 
+ * @returns ts/tsx webpack loader configuration object
+ */
+const getTSLoader = (
+  testRegExp: RegExp, transpileOnly = true
+) => {
+  const useEsbuildLoader = process.env.LENS_DEV_USE_ESBUILD_LOADER === "true";
+
+  useEsbuildLoader && console.info(`\n🚀 using esbuild-loader for ts(x)`);
+
+  if (useEsbuildLoader) {
+    return {
+      test: testRegExp,
+      loader: "esbuild-loader",
+      options: {
+        loader: "tsx",
+        target: "es2015",
+        implementation: esbuild
+      },
+    };
+  }
+
+  return {
+    test: testRegExp,
+    exclude: /node_modules/,
+    use: {
+      loader: "ts-loader",
+      options: {
+        transpileOnly,
+      }
+    }
+  };
+};
+
+export default getTSLoader;
diff --git a/webpack.main.ts b/webpack.main.ts
index 26550de14f..ae78d06d09 100755
--- a/webpack.main.ts
+++ b/webpack.main.ts
@@ -26,6 +26,7 @@ import { isProduction, mainDir, buildDir, isDevelopment } from "./src/common/var
 import nodeExternals from "webpack-node-externals";
 import ProgressBarPlugin from "progress-bar-webpack-plugin";
 import * as vars from "./src/common/vars";
+import getTSLoader from "./src/common/getTSLoader";
 
 export default function (): webpack.Configuration {
   console.info("WEBPACK:main", vars);
@@ -55,16 +56,7 @@ export default function (): webpack.Configuration {
           test: /\.node$/,
           use: "node-loader"
         },
-        {
-          test: /\.ts$/,
-          exclude: /node_modules/,
-          use: {
-            loader: "ts-loader",
-            options: {
-              transpileOnly: true,
-            }
-          }
-        },
+        getTSLoader(/\.ts$/)
       ]
     },
     plugins: [
diff --git a/webpack.renderer.ts b/webpack.renderer.ts
index eafc636a5c..027d18ac08 100755
--- a/webpack.renderer.ts
+++ b/webpack.renderer.ts
@@ -28,6 +28,7 @@ import ForkTsCheckerPlugin from "fork-ts-checker-webpack-plugin";
 import ProgressBarPlugin from "progress-bar-webpack-plugin";
 import ReactRefreshWebpackPlugin from "@pmmmwh/react-refresh-webpack-plugin";
 import * as vars from "./src/common/vars";
+import getTSLoader from "./src/common/getTSLoader";
 
 export default [
   webpackLensRenderer
@@ -88,16 +89,7 @@ export function webpackLensRenderer({ showVars = true } = {}): webpack.Configura
           test: /\.node$/,
           use: "node-loader"
         },
-        {
-          test: /\.tsx?$/,
-          exclude: /node_modules/,
-          use: {
-            loader: "ts-loader",
-            options: {
-              transpileOnly: true, // ForkTsCheckerPlugin does type-checking
-            }
-          }
-        },
+        getTSLoader(/\.tsx?$/),
         {
           test: /\.(jpg|png|svg|map|ico)$/,
           use: {