From cd8b44ba2f55ba8ef49c481993a917e2c14e7441 Mon Sep 17 00:00:00 2001
From: tmaslen <tom_maslen@hotmail.com>
Date: Sun, 21 Mar 2021 09:26:37 +0000
Subject: [PATCH] Expose browserify sourcemap feature in plugin interface.

---
 README.md    |  4 ++++
 src/index.js | 14 +++++++++++---
 2 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/README.md b/README.md
index 3183c96..ccd6c60 100644
--- a/README.md
+++ b/README.md
@@ -54,6 +54,7 @@ Configuration options can be set globally in `custom` property and inside each f
 * **plugins** - Array of Babel plugins.
 * **prefix** (default `_optimize`) - Folder to output bundle.
 * **presets** (default `['env']`) - Array of Babel presets.
+* **sourceMaps** (default `false`) - when set to `true` an inline sourcemap is generated. This improves stack trace error messages for minified source files. To enable Lambda to use the generated sourcemap you need to enable the feature using the environment variable `NODE_OPTIONS: --enable-source-maps`.
 
 ```yml
 custom:
@@ -71,6 +72,7 @@ custom:
     prefix: 'dist'
     plugins: ['transform-decorators-legacy']
     presets: ['es2017']
+    sourceMaps: true
 ```
 
 #### Function
@@ -93,6 +95,7 @@ functions:
 * **minify** - When minify is set to `false` Babili preset won't be added.
 * **plugins** - Array of Babel plugins.
 * **presets** - Array of Babel presets.
+* **sourceMaps** (default `false`) - when set to `true` an inline sourcemap is generated. This improves stack trace error messages for minified source files. To enable Lambda to use the generated sourcemap you need to enable the feature using the environment variable `NODE_OPTIONS: --enable-source-maps`.
 
 ```yml
 functions:
@@ -109,6 +112,7 @@ functions:
       minify: false
       plugins: ['transform-decorators-legacy']
       presets: ['es2017']
+      sourceMaps: true
 ```
 
 #### includePaths Files
diff --git a/src/index.js b/src/index.js
index 88a2ba6..842cc2f 100644
--- a/src/index.js
+++ b/src/index.js
@@ -79,7 +79,8 @@ class Optimize {
             targets: {
               node: nodeVersion
             }
-          }]]
+          }]],
+          sourceMaps: false
         }
       }
 
@@ -144,6 +145,11 @@ class Optimize {
         if (Array.isArray(this.custom.optimize.presets)) {
           this.optimize.options.presets = this.custom.optimize.presets
         }
+
+        /** Source maps */
+        if (typeof this.custom.optimize.sourceMaps === 'boolean') {
+          this.optimize.options.sourceMaps = this.custom.optimize.sourceMaps
+        }
       }
 
       /** Serverless hooks */
@@ -323,7 +329,8 @@ class Optimize {
       ignore: this.optimize.options.ignore,
       minify: this.optimize.options.minify,
       plugins: this.optimize.options.plugins,
-      presets: this.optimize.options.presets
+      presets: this.optimize.options.presets,
+      sourceMaps: this.optimize.options.sourceMaps
     }
 
     if (functionObject.optimize) {
@@ -393,7 +400,8 @@ class Optimize {
         global: undefined,
         'Buffer.isBuffer': undefined,
         Buffer: undefined
-      }
+      },
+      debug: functionOptions.sourceMaps
     })
 
     /** Browserify exclude */