const path = require('path')
|
const babel = require('@babel/core')
|
const { isWindows } = require('@vue/cli-shared-utils')
|
|
function genTranspileDepRegex (transpileDependencies) {
|
const deps = transpileDependencies.map(dep => {
|
if (typeof dep === 'string') {
|
const depPath = path.join('node_modules', dep, '/')
|
return isWindows
|
? depPath.replace(/\\/g, '\\\\') // double escape for windows style path
|
: depPath
|
} else if (dep instanceof RegExp) {
|
return dep.source
|
}
|
})
|
return deps.length ? new RegExp(deps.join('|')) : null
|
}
|
|
module.exports = (api, options) => {
|
const useThreads = process.env.NODE_ENV === 'production' && !!options.parallel
|
const cliServicePath = path.dirname(require.resolve('@vue/cli-service'))
|
const transpileDepRegex = genTranspileDepRegex(options.transpileDependencies)
|
|
// try to load the project babel config;
|
// if the default preset is used,
|
// there will be a VUE_CLI_TRANSPILE_BABEL_RUNTIME env var set.
|
// the `filename` field is required
|
// in case there're filename-related options like `ignore` in the user config
|
babel.loadPartialConfigSync({ filename: api.resolve('src/main.js') })
|
|
api.chainWebpack(webpackConfig => {
|
webpackConfig.resolveLoader.modules.prepend(path.join(__dirname, 'node_modules'))
|
|
const jsRule = webpackConfig.module
|
.rule('js')
|
.test(/\.m?jsx?$/)
|
.exclude
|
.add(filepath => {
|
// always transpile js in vue files
|
if (/\.vue\.jsx?$/.test(filepath)) {
|
return false
|
}
|
// exclude dynamic entries from cli-service
|
if (filepath.startsWith(cliServicePath)) {
|
return true
|
}
|
|
// only include @babel/runtime when the @vue/babel-preset-app preset is used
|
if (
|
process.env.VUE_CLI_TRANSPILE_BABEL_RUNTIME &&
|
filepath.includes(path.join('@babel', 'runtime'))
|
) {
|
return false
|
}
|
|
// check if this is something the user explicitly wants to transpile
|
if (transpileDepRegex && transpileDepRegex.test(filepath)) {
|
return false
|
}
|
// Don't transpile node_modules
|
return /node_modules/.test(filepath)
|
})
|
.end()
|
.use('cache-loader')
|
.loader(require.resolve('cache-loader'))
|
.options(api.genCacheConfig('babel-loader', {
|
'@babel/core': require('@babel/core/package.json').version,
|
'@vue/babel-preset-app': require('@vue/babel-preset-app/package.json').version,
|
'babel-loader': require('babel-loader/package.json').version,
|
modern: !!process.env.VUE_CLI_MODERN_BUILD,
|
browserslist: api.service.pkg.browserslist
|
}, [
|
'babel.config.js',
|
'.browserslistrc'
|
]))
|
.end()
|
|
if (useThreads) {
|
const threadLoaderConfig = jsRule
|
.use('thread-loader')
|
.loader(require.resolve('thread-loader'))
|
|
if (typeof options.parallel === 'number') {
|
threadLoaderConfig.options({ workers: options.parallel })
|
}
|
}
|
|
jsRule
|
.use('babel-loader')
|
.loader(require.resolve('babel-loader'))
|
})
|
}
|
