overleaf/services/web/webpack.config.js

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const fs = require('fs')
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const path = require('path')
const webpack = require('webpack')
const CopyPlugin = require('copy-webpack-plugin')
const ManifestPlugin = require('webpack-manifest-plugin')
const MiniCssExtractPlugin = require('mini-css-extract-plugin')
const PackageVersions = require('./app/src/infrastructure/PackageVersions')
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const MODULES_PATH = path.join(__dirname, '/modules')
// Generate a hash of entry points, including modules
const entryPoints = {
main: './frontend/js/main.js',
ide: './frontend/js/ide.js',
style: './frontend/stylesheets/style.less',
'ieee-style': './frontend/stylesheets/ieee-style.less',
'light-style': './frontend/stylesheets/light-style.less',
'sl-style': './frontend/stylesheets/sl-style.less'
}
// Attempt to load frontend entry-points from modules, if they exist
if (fs.existsSync(MODULES_PATH)) {
fs.readdirSync(MODULES_PATH).reduce((acc, module) => {
const entryPath = path.join(MODULES_PATH, module, '/frontend/js/index.js')
if (fs.existsSync(entryPath)) {
acc[module] = entryPath
}
return acc
}, entryPoints)
}
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module.exports = {
// Defines the "entry point(s)" for the application - i.e. the file which
// bootstraps the application
entry: entryPoints,
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// Define where and how the bundle will be output to disk
// Note: webpack-dev-server does not write the bundle to disk, instead it is
// kept in memory for speed
output: {
path: path.join(__dirname, '/public'),
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// By default write into js directory
filename: 'js/[name].js',
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// Output as UMD bundle (allows main JS to import with CJS, AMD or global
// style code bundles
libraryTarget: 'umd',
// Name the exported variable from output bundle
library: ['Frontend', '[name]']
},
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// Define how file types are handled by webpack
module: {
rules: [
{
// Pass application JS files through babel-loader, compiling to ES5
test: /\.js$/,
// Only compile application files (dependencies are in ES5 already)
exclude: /node_modules/,
use: [
{
loader: 'babel-loader',
options: {
// Configure babel-loader to cache compiled output so that
// subsequent compile runs are much faster
cacheDirectory: true
}
}
]
},
{
// Wrap PDF.js worker in a Web Worker
test: /pdf\.worker\.js$/,
use: [
{
loader: 'worker-loader',
options: {
// Write into js directory (note: customising this is not possible
// with pdfjs-dist/webpack auto loader)
name: 'js/pdfjs-worker.[hash].js',
// Override dynamically-set publicPath to explicitly use root.
// This prevents a security problem where the Worker - normally
// loaded from a CDN - has cross-origin issues, by forcing it to not
// be loaded from the CDN
publicPath: '/'
}
}
]
},
{
// Pass Less files through less-loader/css-loader/mini-css-extract-
// plugin (note: run in reverse order)
test: /\.less$/,
use: [
// Allows the CSS to be extracted to a separate .css file
{ loader: MiniCssExtractPlugin.loader },
// Resolves any CSS dependencies (e.g. url())
{ loader: 'css-loader' },
{
// Runs autoprefixer on CSS via postcss
loader: 'postcss-loader',
options: {
// Uniquely identifies the postcss plugin (required by webpack)
ident: 'postcss',
plugins: [
require('autoprefixer')({ env: 'last 2 versions, ie >= 10' })
]
}
},
// Compiles the Less syntax to CSS
{ loader: 'less-loader' }
]
},
{
// These options are necessary for handlebars to have access to helper
// methods
test: /\.handlebars$/,
loader: 'handlebars-loader',
options: {
compat: true,
knownHelpersOnly: false,
runtimePath: 'handlebars/runtime'
}
},
// Allow for injection of modules dependencies by reading contents of
// modules directory and adding necessary dependencies
{
test: path.join(__dirname, 'modules/modules-main.js'),
use: [
{
loader: 'val-loader'
}
]
},
{
test: path.join(__dirname, 'modules/modules-ide.js'),
use: [
{
loader: 'val-loader'
}
]
},
{
// Expose jQuery and $ global variables
test: require.resolve('jquery'),
use: [
{
loader: 'expose-loader',
options: 'jQuery'
},
{
loader: 'expose-loader',
options: '$'
}
]
},
{
// Expose angular global variable
test: require.resolve('angular'),
use: [
{
loader: 'expose-loader',
options: 'angular'
}
]
},
{
// Expose underscore global variable
test: path.join(
__dirname,
`frontend/js/vendor/libs/${PackageVersions.lib('underscore')}.js`
),
use: [
{
loader: 'expose-loader',
options: '_'
}
]
},
{
// Expose Algolia global variable
test: path.join(
__dirname,
`frontend/js/vendor/libs/${PackageVersions.lib('algolia')}.js`
),
use: [
{
loader: 'expose-loader',
options: 'AlgoliaSearch'
}
]
}
]
},
resolve: {
alias: {
// Aliases for AMD modules
// Vendored dependencies in public/src/vendor/libs (e.g. angular)
libs: path.join(__dirname, 'frontend/js/vendor/libs'),
// Use vendored moment (with correct version)
moment: path.join(
__dirname,
`frontend/js/vendor/libs/${PackageVersions.lib('moment')}`
),
// Enables ace/ace shortcut
ace: path.join(
__dirname,
`frontend/js/vendor/${PackageVersions.lib('ace')}`
),
// fineupload vendored dependency (which we're aliasing to fineuploadER
// for some reason)
fineuploader: path.join(
__dirname,
`frontend/js/vendor/libs/${PackageVersions.lib('fineuploader')}`
)
},
// Define what can be imported with out an absolute or relative path. This
// is because we need to override the default (which is just node_modules)
// to get AMD modules in public/src to work as they do not use relative/
// absolute paths for dependencies
modules: ['frontend/js', 'node_modules']
},
// Split out vendored dependencies that are shared between 2 or more "real
// bundles" (e.g. ide.js/main.js) as a separate "libraries" bundle and ensure
// that they are de-duplicated from the other bundles. This allows the
// libraries bundle to be independently cached (as it likely will change less
// than the other bundles)
optimization: {
splitChunks: {
cacheGroups: {
libraries: {
test: /[\\/]node_modules[\\/]|[\\/]frontend[\\/]js[\\/]vendor[\\/]libs[\\/]/,
name: 'libraries',
chunks: 'initial',
minChunks: 2
}
}
}
},
plugins: [
// Generate a manifest.json file which is used by the backend to map the
// base filenames to the generated output filenames
new ManifestPlugin({
// Always write the manifest file to disk (even if in dev mode, where
// files are held in memory). This is needed because the server will read
// this file (from disk) when building the script's url
writeToFileEmit: true
}),
// Silence warning when loading moment from vendored dependencies as it
// attempts to load locales.js file which does not exist (but this is fine
// as we don't want to load the large amount of locale data from moment)
new webpack.IgnorePlugin(/^\.\/locale$/, /frontend\/js\/vendor\/libs/),
new CopyPlugin([
{
from: 'frontend/js/vendor/libs/mathjax',
to: 'js/libs/mathjax'
},
{
from: 'frontend/js/vendor/libs/sigma-master',
to: 'js/libs/sigma-master'
},
{
from: `frontend/js/vendor/ace-${PackageVersions.version.ace}/`,
to: `js/ace-${PackageVersions.version.ace}/`
},
// Copy CMap files from pdfjs-dist package to build output. These are used
// to provide support for non-Latin characters
{ from: 'node_modules/pdfjs-dist/cmaps', to: 'js/cmaps' }
])
],
// If underscore is required by another dependency *don't* include in the
// bundle and use the relevant global variable instead
externals: {
underscore: '_'
}
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}