fix: require is not a function (#65)

* add possibility to specify a function to alter webpack config

* update editConfig description and readme

README.md

@@ -82,9 +82,22 @@ Usage: pack [options] <path>
 
   Options:
 
-    -h, --help           output usage information
-    -u, --uglify         Uglify the project when webpacking
-    -o, --output <path>  Path for output directory
+    -h, --help               output usage information
+    -u, --uglify             Uglify the project when webpacking
+    -o, --output <path>      Path for output directory
+    -c, --copyToOutput       Copy files to output directory
+    -e, --editConfig <path>  Customize webpack config by applying function in this file
+```
+
+The `editConfig` option will let you specify a js file containing a function to alter the webpack configuration.
+
+```
+// $root/webpack.config.js
+
+module.exports = function(config, webpack) {
+    config.plugins.push(new webpack.DefinePlugin({ "global.GENTLY": false }));
+    return config;
+}
 ```
 
 ### funcpack.config.json

src/main.ts

@@ -22,6 +22,7 @@ async function runCli() {
         .option("-u, --uglify", "Uglify the project when webpacking")
         .option("-o, --output <path>", "Path for output directory")
         .option("-c, --copyToOutput", "Copy files to output directory")
+        .option("-e, --editConfig <path>", "Customize webpack config by applying function in this file")
         .action(pack);
 
     p.command("*", null, { noHelp: true, isDefault: true })
@@ -139,6 +140,7 @@ async function pack(name: string, options: any) {
     try {
         winston.info("Webpacking project");
         await WebpackRunner.run({
+            editConfig: options.editConfig,
             ignoredModules: config.ignoredModules,
             outputPath,
             projectRootPath,

src/webpack-runner.ts

@@ -1,6 +1,7 @@
 import * as debugLib from "debug";
 import * as path from "path";
 import * as webpack from "webpack";
+import * as winston from "winston";
 import { IPackhostGeneratorOptions } from "./";
 import { FileHelper } from "./utils";
 
@@ -12,6 +13,7 @@ export interface IWebpackRunner {
     outputPath?: string;
     uglify?: boolean;
     ignoredModules?: string[];
+    editConfig?: string;
 }
 
 export class WebpackRunner {
@@ -36,7 +38,7 @@ export class WebpackRunner {
             }
 
             debug("Creating Webpack Configuration");
-            const config: webpack.Configuration = {
+            let config: webpack.Configuration = {
                 entry: oldPath,
                 externals: ignoredModules,
                 node: {
@@ -62,6 +64,17 @@ export class WebpackRunner {
                 }
             }
 
+            try {
+                if (options.editConfig) {
+                    const customizeFunctionPath = path.join(options.projectRootPath, options.editConfig);
+                    const customizeFunction = require(customizeFunctionPath);
+                    config = customizeFunction(config, webpack);
+                }
+            } catch (e) {
+                winston.error(e);
+                throw new Error("Could not apply customize function");
+            }
+
             debug("Creating Webpack instance");
             const compiler = webpack(config);
             debug("Started webpack");