fix(targets): ensure we only transpile what's necessary

before this commit we were still reading from:
- user babelrc
- user TypeScript compilerOptions (while we need different ones)
- browserlists

before this commit we were trying to minize code down to ES5 which would code
weird issues with modules like Knex:

`Class constructor  cannot be invoked without 'new'`

Which resulted in heavily transpiled code while Node.js do not need so much
changes.

It's now a lot better. Enjoy.

Author: vvo

README.md

@@ -62,7 +62,7 @@ export function handler(event) {
 - TypeScript support
 - Babel support (preset-env)
 - babel & webpack caching
-- node_modules are split into a single `vendor.js` file, minified. Allowing you to debug your own code in AWS console most of the time
+- node_modules are split into a single `vendor.js` file. Allowing you to debug your own code in AWS console most of the time
 
 - ⚠️ the only configuration file from your project that we will read is `tsconfig.json`. Other files won't be used. If you need to reuse part of your babel configuration, please open an issue with details on your usecase.
 

package.json

@@ -52,7 +52,7 @@
     "find-up": "5.0.0",
     "noop2": "2.0.0",
     "source-map-support": "0.5.19",
-    "ts-loader": "8.0.16",
+    "ts-loader": "8.0.17",
     "webpack": "5.21.2",
     "webpack-cli": "4.5.0"
   },
@@ -69,7 +69,7 @@
     "semantic-release-cli": "5.4.3",
     "tsdx": "0.14.1",
     "tslib": "2.1.0",
-    "typescript": "4.1.4"
+    "typescript": "4.1.5"
   },
   "peerDependencies": {
     "@aws-cdk/aws-lambda": "^1.54.0",

src/NodejsFunction.ts

@@ -141,7 +141,7 @@ export class NodejsFunction extends lambda.Function {
 
     module.exports = {
       name: "aws-lambda-nodejs-webpack",
-      mode: "production",
+      mode: "none",
       entry: "${escapePathForNodeJs(entryFullPath)}",
       target: "node",
       resolve: {
@@ -159,6 +159,7 @@ export class NodejsFunction extends lambda.Function {
             use: {
               loader: "${escapePathForNodeJs(pluginsPaths["babel-loader"])}",
               options: {
+                babelrc: false, // do not use babelrc when present (could pollute lambda configuration)
                 cwd: "${escapePathForNodeJs(process.cwd())}",
                 cacheDirectory: "${escapePathForNodeJs(
                   path.join(
@@ -180,6 +181,7 @@ export class NodejsFunction extends lambda.Function {
                       },
                       loose: true,
                       bugfixes: true,
+                      ignoreBrowserslistConfig: true // do not use browser list configuration, we build for node X that's it
                     },
                   ]
                 ],
@@ -205,7 +207,18 @@ export class NodejsFunction extends lambda.Function {
                 configFile: "${escapePathForNodeJs(
                   path.join(process.cwd(), "tsconfig.json"),
                 )}",
-                transpileOnly: true
+                transpileOnly: true,
+                // from: https://www.npmjs.com/package/@tsconfig/node12
+                compilerOptions: {
+                  lib: ["es2019", "es2020.promise", "es2020.bigint", "es2020.string"],
+                  module: "commonjs",
+                  target: "es2019",
+                  baseUrl: ".",
+                  strict: true,
+                  esModuleInterop: true,
+                  skipLibCheck: true,
+                  forceConsistentCasingInFileNames: true
+                }
               }
             },
             exclude: /node_modules/,
@@ -215,9 +228,9 @@ export class NodejsFunction extends lambda.Function {
       cache: {
         type: "filesystem",
         buildDependencies: {
-          // force the config file to be this current file, since it won't change over builds
-          // while the temporary webpack config file used would change, thus disabling webpack cache
-          config: ["${escapePathForNodeJs(__filename)}"]
+          config: [__filename, "${escapePathForNodeJs(
+            path.join(process.cwd(), "tsconfig.json"),
+          )}"]
         },
         cacheDirectory: "${escapePathForNodeJs(
           path.join(
@@ -229,6 +242,9 @@ export class NodejsFunction extends lambda.Function {
           ),
         )}"
       },
+      // note: we specifically do not minify our code for Node.js
+      // I have had horrible experience with code being minified for ES5 that would break on Node 12
+      // If you have a good minifier that can minify to target Node 12 then open a PR
       optimization: {
         splitChunks: {
           cacheGroups: {
@@ -240,10 +256,6 @@ export class NodejsFunction extends lambda.Function {
             },
           },
         },
-        minimize: true,
-        minimizer: [new TerserPlugin({
-          include: "vendor.js" // only minify vendor.js
-        })],
       },
       externals: [...builtinModules, "aws-sdk"],
       output: {
@@ -265,7 +277,7 @@ export class NodejsFunction extends lambda.Function {
 
     fs.writeFileSync(webpackConfigPath, webpackConfiguration);
 
-    // console.time("webpack");
+    console.time("aws-lambda-nodejs-webpack");
     const webpack = spawn.sync(
       webpackBinPath,
       ["--config", webpackConfigPath],
@@ -275,7 +287,7 @@ export class NodejsFunction extends lambda.Function {
         cwd: outputDir,
       },
     );
-    // console.timeEnd("webpack");
+    console.timeEnd("aws-lambda-nodejs-webpack");
 
     if (webpack.status !== 0) {
       console.error(

yarn.lock

@@ -10776,10 +10776,10 @@ ts-jest@^25.3.1:
     semver "6.x"
     yargs-parser "18.x"
 
-ts-loader@8.0.16:
-  version "8.0.16"
-  resolved "https://registry.yarnpkg.com/ts-loader/-/ts-loader-8.0.16.tgz#a60311f01f015518e1cfbb5698e6ca8830cd2391"
-  integrity sha512-Cr9ywsgg1n8cjGjIogHLPlqe3WJUHzuJaqwNo5I596KpIqekKzxvSENbrXeOypHcXSPPsr8hV6mglngyXvcKrg==
+ts-loader@8.0.17:
+  version "8.0.17"
+  resolved "https://registry.yarnpkg.com/ts-loader/-/ts-loader-8.0.17.tgz#98f2ccff9130074f4079fd89b946b4c637b1f2fc"
+  integrity sha512-OeVfSshx6ot/TCxRwpBHQ/4lRzfgyTkvi7ghDVrLXOHzTbSK413ROgu/xNqM72i3AFeAIJgQy78FwSMKmOW68w==
   dependencies:
     chalk "^4.1.0"
     enhanced-resolve "^4.0.0"
@@ -10960,10 +10960,10 @@ typedarray@^0.0.6:
   resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
   integrity sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c=
 
-typescript@4.1.4:
-  version "4.1.4"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.1.4.tgz#f058636e2f4f83f94ddaae07b20fd5e14598432f"
-  integrity sha512-+Uru0t8qIRgjuCpiSPpfGuhHecMllk5Zsazj5LZvVsEStEjmIRRBZe+jHjGQvsgS7M1wONy2PQXd67EMyV6acg==
+typescript@4.1.5:
+  version "4.1.5"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.1.5.tgz#123a3b214aaff3be32926f0d8f1f6e704eb89a72"
+  integrity sha512-6OSu9PTIzmn9TCDiovULTnET6BgXtDYL4Gg4szY+cGsc3JP1dQL8qvE8kShTRx1NIw4Q9IBHlwODjkjWEtMUyA==
 
 typescript@^3.7.3:
   version "3.9.7"