fix(packager): allow hooks to be strings or functions depending on config setup

Author: MarshallOfSound

README.md

@@ -125,11 +125,7 @@ config object:
 You can set `electronPackagerConfig` with **any** of the options from
 [Electron Packager](https://github.com/electron-userland/electron-packager/blob/master/docs/api.md).
 
-**NOTE:** The `afterCopy` and `afterExtract` options are mapped to `require`
-calls internally, so provide a path to a file that exports your hooks and they
-will still run.
-
-**NOTE:** You can also set your `forge` config property of your package.json to point to a JS file the exports the config object like so.
+**NOTE:** You can also set your `forge` config property of your package.json to point to a JS file the exports the config object:
 
 ```js
 {
@@ -139,4 +135,8 @@ will still run.
   }
   ...
 }
-```
+```
+
+**NOTE:** If you use the JSON object then the `afterCopy` and `afterExtract` options are mapped to `require`
+calls internally, so provide a path to a file that exports your hooks and they will still run.  If you use
+the JS file method mentioned above then you can use functions normally.

src/electron-forge-package.js

@@ -73,8 +73,12 @@ const main = async () => {
       await rebuildHook(buildPath, electronVersion, pPlatform, pArch);
       packagerSpinner = ora.ora('Packaging Application').start();
       done();
-    }].concat(forgeConfig.electronPackagerConfig.afterCopy ? forgeConfig.electronPackagerConfig.afterCopy.map(item => require(item)) : []),
-    afterExtract: forgeConfig.electronPackagerConfig.afterExtract ? forgeConfig.electronPackagerConfig.afterExtract.map(item => require(item)) : [],
+    }].concat(forgeConfig.electronPackagerConfig.afterCopy ? forgeConfig.electronPackagerConfig.afterCopy.map(item =>
+      (typeof item === 'string' ? require(item) : item)
+    ) : []),
+    afterExtract: forgeConfig.electronPackagerConfig.afterExtract ? forgeConfig.electronPackagerConfig.afterExtract.map(item =>
+      (typeof item === 'string' ? require(item) : item)
+    ) : [],
     dir,
     arch,
     platform,