69 lines
2.4 KiB
JavaScript
69 lines
2.4 KiB
JavaScript
import babelLoader from 'babel-loader'
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import hash from 'string-hash'
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import { basename } from 'path'
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module.exports = babelLoader.custom(babel => {
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const presetItem = babel.createConfigItem(require('../../babel/preset'), { type: 'preset' })
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const applyCommonJs = babel.createConfigItem(require('../../babel/plugins/commonjs'), { type: 'plugin' })
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const commonJsItem = babel.createConfigItem(require('@babel/plugin-transform-modules-commonjs'), { type: 'plugin' })
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const configs = new Set()
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return {
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customOptions (opts) {
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const custom = {
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isServer: opts.isServer
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}
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const loader = Object.assign({
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cacheCompression: false,
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cacheDirectory: true
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}, opts)
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delete loader.isServer
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return { loader, custom }
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},
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config (cfg, { source, customOptions: { isServer } }) {
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const filename = this.resourcePath
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const options = Object.assign({}, cfg.options)
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if (cfg.hasFilesystemConfig()) {
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for (const file of [cfg.babelrc, cfg.config]) {
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// We only log for client compilation otherwise there will be double output
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if (file && !isServer && !configs.has(file)) {
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configs.add(file)
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console.log(`> Using external babel configuration`)
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console.log(`> Location: "${file}"`)
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}
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}
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} else {
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// Add our default preset if the no "babelrc" found.
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options.presets = [...options.presets, presetItem]
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}
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if (isServer && source.indexOf('next/data') !== -1) {
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const nextDataPlugin = babel.createConfigItem([require('../../babel/plugins/next-data'), { key: basename(filename) + '-' + hash(filename) }], { type: 'plugin' })
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options.plugins = options.plugins || []
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options.plugins.push(nextDataPlugin)
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}
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// If the file has `module.exports` we have to transpile commonjs because Babel adds `import` statements
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// That break webpack, since webpack doesn't support combining commonjs and esmodules
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if (source.indexOf('module.exports') !== -1) {
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options.plugins = options.plugins || []
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options.plugins.push(applyCommonJs)
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}
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// As next-server/lib has stateful modules we have to transpile commonjs
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options.overrides = [
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...(options.overrides || []),
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{
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test: /next-server[\\/]dist[\\/]lib/,
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plugins: [
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commonJsItem
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]
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}
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]
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return options
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}
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}
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})
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