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webpack.config.js
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webpack.config.js
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/* global __dirname module process require */
const path = require('path');
const dappPath = process.env.DAPP_PATH;
const embarkPath = process.env.EMBARK_PATH;
const dappNodeModules = path.join(dappPath, 'node_modules');
const embarkNodeModules = path.join(embarkPath, 'node_modules');
let nodePathNodeModules;
if (process.env.NODE_PATH) {
nodePathNodeModules = process.env.NODE_PATH.split(path.delimiter);
} else {
nodePathNodeModules = [];
}
if (!nodePathNodeModules.includes(embarkNodeModules)) {
nodePathNodeModules.unshift(embarkNodeModules);
}
function requireFromEmbark(mod) {
return require(requireFromEmbark.resolve(mod));
}
requireFromEmbark.resolve = function (mod) {
return require.resolve(
mod,
{paths: [embarkNodeModules]}
);
};
const cloneDeep = requireFromEmbark('lodash.clonedeep');
const glob = requireFromEmbark('glob');
const HardSourceWebpackPlugin = requireFromEmbark('hard-source-webpack-plugin');
const embarkAliases = require(path.join(dappPath, '.embark/embark-aliases.json'));
const embarkAssets = require(path.join(dappPath, '.embark/embark-assets.json'));
const embarkJson = require(path.join(dappPath, 'embark.json'));
const embarkPipeline = require(path.join(dappPath, '.embark/embark-pipeline.json'));
const buildDir = path.join(dappPath, embarkJson.buildDir);
// it's important to `embark reset` if a pkg version is specified in
// embark.json and changed/removed later, otherwise pkg resolution may behave
// unexpectedly
let versions;
try {
versions = glob.sync(path.join(dappPath, '.embark/versions/*/*'));
} catch (e) {
versions = [];
}
const entry = Object.keys(embarkAssets)
.filter(key => key.match(/\.js$/))
.reduce((obj, key) => {
// webpack entry paths should start with './' if they're relative to the
// webpack context; embark.json "app" keys correspond to lists of .js
// source paths relative to the top-level dapp dir and may be missing the
// leading './'
obj[key] = embarkAssets[key]
.map(file => {
let file_path = file.path;
if (!file.path.match(/^\.\//)) {
file_path = './' + file_path;
}
return file_path;
});
return obj;
}, {});
function resolve(pkgName) {
if (Array.isArray(pkgName)) {
const _pkgName = pkgName[0];
pkgName[0] = requireFromEmbark.resolve(_pkgName);
return pkgName;
}
return requireFromEmbark.resolve(pkgName);
}
// base config
// -----------------------------------------------------------------------------
// order and options of babel plugins and presets adapted from babel-preset-react-app:
// see: https://github.com/facebook/create-react-app/tree/v2.0.4/packages/babel-preset-react-app
// + babel plugins run before babel presets.
// + babel plugin ordering is first to last.
// + babel preset ordering is reversed (last to first).
// see: https://babeljs.io/docs/en/plugins#plugin-ordering
const base = {
context: dappPath,
entry: entry,
module: {
rules: [
{
test: /\.scss$/,
use: [
'style-loader',
'css-loader',
'sass-loader'
]
},
{
test: /\.css$/,
use: [
'style-loader',
'css-loader'
]
},
{
test: /\.(png|woff|woff2|eot|ttf|svg)$/,
loader: 'url-loader?limit=100000'
},
{
test: /\.jsx?$/,
loader: 'babel-loader',
exclude: /(node_modules|bower_components|\.embark[\\/]versions)/,
options: {
cacheDirectory: true,
cacheCompression: false,
customize: path.join(__dirname, 'babel-loader-overrides.js'),
plugins: [
[
'babel-plugin-module-resolver', {
alias: embarkAliases
}
],
'babel-plugin-macros',
'@babel/plugin-transform-destructuring',
[
'@babel/plugin-proposal-decorators', {
legacy: true
}
],
[
'@babel/plugin-proposal-class-properties', {
loose: true
}
],
[
'@babel/plugin-proposal-object-rest-spread', {
useBuiltIns: true
}
],
[
'@babel/plugin-transform-runtime', {
helpers: true,
regenerator: true
}
],
'@babel/plugin-syntax-dynamic-import'
].map(resolve),
presets: [
[
'@babel/preset-env', {
exclude: ['transform-typeof-symbol'],
modules: false,
targets: {
browsers: ['last 1 version', 'not dead', '> 0.2%']
}
}
],
[
'@babel/preset-react', {
useBuiltIns: true
}
]
].map(resolve)
}
},
{
test: /\.worker\.js$/,
use: { loader: 'worker-loader' }
}
]
},
output: {
filename: (chunkData) => chunkData.chunk.name,
// globalObject workaround for node-compatible UMD builds with webpack 4
// see: https://github.com/webpack/webpack/issues/6522#issuecomment-371120689
// see: https://github.com/webpack/webpack/issues/6522#issuecomment-418864518
globalObject: '(typeof self !== \'undefined\' ? self : this)',
libraryTarget: 'umd',
path: buildDir
},
plugins: [new HardSourceWebpackPlugin()],
// profiling and generating verbose stats increases build time; if stats
// are generated embark will write the output to:
// path.join(dappPath, '.embark/stats.[json,report]')
// to visualize the stats info in a browser run:
// npx webpack-bundle-analyzer .embark/stats.json <buildDir>
profile: true, stats: 'verbose',
resolve: {
alias: embarkAliases,
extensions: [
// webpack defaults
// see: https://webpack.js.org/configuration/resolve/#resolve-extensions
'.wasm', '.mjs', '.js', '.json',
// additional extensions
'.jsx'
],
modules: [
...versions,
'node_modules',
dappNodeModules,
...nodePathNodeModules
]
},
resolveLoader: {
modules: [
'node_modules',
dappNodeModules,
...nodePathNodeModules
]
}
};
const baseBabelLoader = base.module.rules[3];
// Flow
// -----------------------------------------------------------------------------
// should be false in configs that have isTypeScriptEnabled = true
// const isFlowEnabled = !embarkPipeline.typescript;
// if (isFlowEnabled) {
// // position @babel/plugin-transform-flow-strip-types per babel-preset-react-app
// baseBabelLoader.options.plugins.unshift(
// requireFromEmbark.resolve('@babel/plugin-transform-flow-strip-types')
// );
// }
// TypeScript
// -----------------------------------------------------------------------------
// should be false in configs that have isFlowEnabled = true
const isTypeScriptEnabled = !!embarkPipeline.typescript;
if (isTypeScriptEnabled) {
// position @babel/preset-typescript as the last preset (runs first)
// see: https://blogs.msdn.microsoft.com/typescript/2018/08/27/typescript-and-babel-7/
baseBabelLoader.options.presets.push(
requireFromEmbark.resolve('@babel/preset-typescript')
);
// additional extensions
baseBabelLoader.test = /\.(js|ts)x?$/;
base.resolve.extensions.push('.ts', '.tsx');
}
// if (isFlowEnabled && isTypeScriptEnabled) {
// throw new Error('isFlowEnabled and isTypeScriptEnabled cannot both be true');
// }
// development config
// -----------------------------------------------------------------------------
const development = cloneDeep(base);
// full source maps increase build time but are useful during dapp development
development.devtool = 'source-map';
development.mode = 'development';
// alternatively:
// development.mode = 'none';
development.name = 'development';
const devBabelLoader = development.module.rules[3];
devBabelLoader.options.compact = false;
// enable 'development' option for @babel/preset-react
const devPresetReact = devBabelLoader.options.presets[1];
const devPresetReactOptions = devPresetReact[1];
devPresetReactOptions.development = true;
// production config
// -----------------------------------------------------------------------------
const production = cloneDeep(base);
production.mode = 'production';
production.name = 'production';
const prodBabelLoader = production.module.rules[3];
// position babel-plugin-transform-react-remove-prop-types per babel-preset-react-app
prodBabelLoader.options.plugins.splice(prodBabelLoader.length - 1, 0, [
requireFromEmbark.resolve('babel-plugin-transform-react-remove-prop-types'),
{
removeImport: true
}
]);
// export a list of named configs
// -----------------------------------------------------------------------------
module.exports = [
development,
production
];