69 lines
2.0 KiB
JavaScript
69 lines
2.0 KiB
JavaScript
'use strict'
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const PLUGINS_RE = /^(?:@babel\/|babel-)plugin-.+$/
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const PRESETS_RE = /^@babel\/preset-.+$/
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const NODE_ENV = process.env.NODE_ENV || 'development'
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const __PROD__ = NODE_ENV === 'production'
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const configs = {
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'@babel/plugin-proposal-decorators': {
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legacy: true,
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},
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'@babel/plugin-proposal-pipeline-operator': {
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proposal: 'minimal',
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},
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'@babel/preset-env': {
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debug: __PROD__,
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// disabled until https://github.com/babel/babel/issues/8323 is resolved
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// loose: true,
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shippedProposals: true,
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},
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}
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const getConfig = (key, ...args) => {
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const config = configs[key]
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return config === undefined ? {} : typeof config === 'function' ? config(...args) : config
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}
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// some plugins must be used in a specific order
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const pluginsOrder = ['@babel/plugin-proposal-decorators', '@babel/plugin-proposal-class-properties']
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module.exports = function (pkg, configs = {}) {
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const plugins = {}
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const presets = {}
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Object.keys(pkg.devDependencies || {}).forEach(name => {
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if (!(name in presets) && PLUGINS_RE.test(name)) {
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plugins[name] = { ...getConfig(name, pkg), ...configs[name] }
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} else if (!(name in presets) && PRESETS_RE.test(name)) {
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presets[name] = { ...getConfig(name, pkg), ...configs[name] }
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}
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})
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return {
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comments: !__PROD__,
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ignore: __PROD__ ? [/\btests?\//, /\.spec\.js$/] : undefined,
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plugins: Object.keys(plugins)
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.map(plugin => [plugin, plugins[plugin]])
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.sort(([a], [b]) => {
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const oA = pluginsOrder.indexOf(a)
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const oB = pluginsOrder.indexOf(b)
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return oA !== -1 && oB !== -1 ? oA - oB : a < b ? -1 : 1
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}),
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presets: Object.keys(presets).map(preset => [preset, presets[preset]]),
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targets: (() => {
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let node = (pkg.engines || {}).node
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if (node !== undefined) {
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const trimChars = '^=>~'
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while (trimChars.includes(node[0])) {
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node = node.slice(1)
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}
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}
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return { browsers: pkg.browserslist, node }
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})(),
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}
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}
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