Supply main sourcemaps only in dev builds

package.json

@@ -30,10 +30,13 @@
     "lint": "tslint 'src/**/*.ts'",
     "lint:fix": "tslint 'src/**/*.ts' --fix",
     "build": "concurrently -n Main,Rend -c yellow,cyan \"npm run build:main\" \"npm run build:renderer\"",
+    "build:dev": "NODE_ENV='development' npm run build",
     "build:main": "webpack --config webpack.main.js",
+    "build:main:dev": "NODE_ENV='development' npm run build:main",
     "build:renderer": "gulp prebuild:renderer && webpack --config webpack.renderer.js",
-    "build:renderer:watch": "gulp prebuild:renderer && webpack --config webpack.renderer.js --watch",
-    "electron": "npm run build:main && concurrently -k -n Main,Rend -c yellow,cyan \"electron --inspect=5858 ./build --watch\" \"npm run build:renderer:watch\"",
+    "build:renderer:dev": "NODE_ENV='development' npm run build:renderer",
+    "build:renderer:watch": "NODE_ENV='development' gulp prebuild:renderer && webpack --config webpack.renderer.js --watch",
+    "electron": "npm run build:main:dev && concurrently -k -n Main,Rend -c yellow,cyan \"electron --inspect=5858 ./build --watch\" \"npm run build:renderer:watch\"",
     "clean:dist": "rimraf ./dist/*",
     "clean:l10n": "git push origin --delete l10n_master",
     "pack:dir": "npm run clean:dist && electron-builder --dir -p never",

webpack.main.js

@@ -5,6 +5,8 @@ const { CleanWebpackPlugin } = require('clean-webpack-plugin');
 const nodeExternals = require('webpack-node-externals');
 const TsconfigPathsPlugin = require('tsconfig-paths-webpack-plugin');
 
+const NODE_ENV = process.env.NODE_ENV == null ? 'production' : process.env.NODE_ENV;
+
 const common = {
     module: {
         rules: [
@@ -25,16 +27,26 @@ const common = {
         extensions: ['.tsx', '.ts', '.js'],
         plugins: [new TsconfigPathsPlugin({ configFile: './tsconfig.json' })]
     },
+};
+
+const prod = {
+    output: {
+        filename: '[name].js',
+        path: path.resolve(__dirname, 'build'),
+    },
+};
+
+const dev = {
     output: {
         filename: '[name].js',
         path: path.resolve(__dirname, 'build'),
         devtoolModuleFilenameTemplate: '[absolute-resource-path]',
     },
     devtool: 'cheap-source-map'
-};
+}
 
 const main = {
-    mode: 'production',
+    mode: NODE_ENV,
     target: 'electron-main',
     node: {
         __dirname: false,
@@ -67,4 +79,4 @@ const main = {
     externals: [nodeExternals()],
 };
 
-module.exports = merge(common, main);
+module.exports = merge(common, NODE_ENV === 'development' ? dev : prod, main);