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/**
* WARNING: No ES6 modules here. Not transpiled! *
*/
const fs = require( 'fs' );
const path = require( 'path' );
const process = require( 'process' );
const DependencyExtractionWebpackPlugin = require( '@wordpress/dependency-extraction-webpack-plugin' );
const DuplicatePackageCheckerPlugin = require( 'duplicate-package-checker-webpack-plugin' );
const webpack = require( 'webpack' );
const FileConfig = require( './webpack/file-loader' );
const Minify = require( './webpack/minify' );
const SassConfig = require( './webpack/sass' );
const TranspileConfig = require( './webpack/transpile' );
const { cssNameFromFilename, shouldTranspileDependency } = require( './webpack/util' );
// const { workerCount } = require( './webpack.common' ); // todo: shard...
/**
* Internal variables
*/
const isDevelopment = process.env.NODE_ENV !== 'production';
const cachePath = path.resolve( '.cache' );
const shouldCheckForDuplicatePackages = ! process.env.DISABLE_DUPLICATE_PACKAGE_CHECK;
/**
* Return a webpack config object
*
* Arguments to this function replicate webpack's so this config can be used on the command line,
* with individual options overridden by command line args.
* @see {@link https://webpack.js.org/configuration/configuration-types/#exporting-a-function}
* @see {@link https://webpack.js.org/api/cli/}
* @param {Object} env environment options
* @param {Object} argv options map
* @param {Object} argv.entry Entry point(s)
* @param {string} argv.'output-chunk-filename' Output chunk filename
* @param {string} argv.'output-path' Output path
* @param {string} argv.'output-filename' Output filename pattern
* @param {string} argv.'output-library-target' Output library target
* @param {string} argv.'output-chunk-loading-global' Output chunk loading global
* @returns {Object} webpack config
*/
function getWebpackConfig(
env = {},
{
entry,
'output-chunk-filename': outputChunkFilename,
'output-path': outputPath = path.join( process.cwd(), 'dist' ),
'output-filename': outputFilename = '[name].js',
'output-library-target': outputLibraryTarget = 'window',
'output-chunk-loading-global': outputChunkLoadingGlobal = 'webpackChunkwebpack',
} = {}
) {
const workerCount = 1;
const cssFilename = cssNameFromFilename( outputFilename );
const cssChunkFilename = cssNameFromFilename( outputChunkFilename );
let babelConfig = path.join( process.cwd(), 'babel.config.js' );
let presets = [];
if ( ! fs.existsSync( babelConfig ) ) {
presets = [
require.resolve( '@automattic/calypso-babel-config/presets/default' ),
env.WP && require.resolve( '@automattic/calypso-babel-config/presets/wordpress-element' ),
].filter( Boolean );
babelConfig = undefined;
}
// Use this package's PostCSS config. If it doesn't exist postcss will look
// for the config file starting in the current directory (https://github.com/webpack-contrib/postcss-loader#config-cascade)
const consumerPostCssConfig = path.join( process.cwd(), 'postcss.config.js' );
const postCssConfigPath = fs.existsSync( consumerPostCssConfig )
? consumerPostCssConfig
: path.join( __dirname, 'postcss.config.js' );
const webpackConfig = {
bail: ! isDevelopment,
entry,
mode: isDevelopment ? 'development' : 'production',
devtool: process.env.SOURCEMAP || ( isDevelopment ? 'eval' : false ),
output: {
chunkFilename: outputChunkFilename,
path: outputPath,
filename: outputFilename,
libraryTarget: outputLibraryTarget,
chunkLoadingGlobal: outputChunkLoadingGlobal,
},
optimization: {
minimize: ! isDevelopment,
minimizer: Minify(),
},
module: {
strictExportPresence: true,
rules: [
TranspileConfig.loader( {
cacheDirectory: path.resolve( cachePath, 'babel' ),
configFile: babelConfig,
exclude: /node_modules\//,
presets,
workerCount,
} ),
TranspileConfig.loader( {
cacheDirectory: path.resolve( cachePath, 'babel' ),
include: shouldTranspileDependency,
presets: [ require.resolve( '@automattic/calypso-babel-config/presets/dependencies' ) ],
workerCount,
} ),
SassConfig.loader( {
postCssOptions: {
config: postCssConfigPath,
},
} ),
FileConfig.loader(),
],
},
resolve: {
extensions: [ '.json', '.js', '.jsx', '.ts', '.tsx' ],
mainFields: [ 'browser', 'calypso:src', 'module', 'main' ],
conditionNames: [ 'calypso:src', 'import', 'module', 'require' ],
modules: [ 'node_modules' ],
fallback: {
stream: require.resolve( 'stream-browserify' ),
},
},
node: false,
plugins: [
new webpack.DefinePlugin( {
'typeof window': JSON.stringify( 'object' ),
'process.env.NODE_ENV': JSON.stringify( process.env.NODE_ENV ),
'process.env.FORCE_REDUCED_MOTION': JSON.stringify(
!! process.env.FORCE_REDUCED_MOTION || false
),
global: 'window',
} ),
new webpack.IgnorePlugin( { resourceRegExp: /^\.\/locale$/, contextRegExp: /moment$/ } ),
...SassConfig.plugins( {
chunkFilename: cssChunkFilename,
filename: cssFilename,
minify: ! isDevelopment,
} ),
...( shouldCheckForDuplicatePackages ? [ new DuplicatePackageCheckerPlugin() ] : [] ),
...( env.WP ? [ new DependencyExtractionWebpackPlugin( { injectPolyfill: true } ) ] : [] ),
],
};
return webpackConfig;
}
module.exports = getWebpackConfig;
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