'use strict'
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const req = require('import-cwd')
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/**
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* Plugin Loader
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*
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* @private
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* @method load
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*
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* @param {String} plugin PostCSS Plugin Name
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* @param {Object} options PostCSS Plugin Options
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*
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* @return {Function} PostCSS Plugin
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*/
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const load = (plugin, options, file) => {
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try {
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if (
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options === null ||
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options === undefined ||
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Object.keys(options).length === 0
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) {
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return req(plugin)
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} else {
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return req(plugin)(options)
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}
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} catch (err) {
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throw new Error(`Loading PostCSS Plugin failed: ${err.message}\n\n(@${file})`)
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}
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}
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/**
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* Load Plugins
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*
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* @private
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* @method plugins
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*
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* @param {Object} config PostCSS Config Plugins
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*
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* @return {Array} plugins PostCSS Plugins
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*/
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const plugins = (config, file) => {
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let plugins = []
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if (Array.isArray(config.plugins)) {
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plugins = config.plugins.filter(Boolean)
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} else {
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plugins = Object.keys(config.plugins)
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.filter((plugin) => {
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return config.plugins[plugin] !== false ? plugin : ''
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})
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.map((plugin) => {
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return load(plugin, config.plugins[plugin], file)
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})
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}
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if (plugins.length && plugins.length > 0) {
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plugins.forEach((plugin, i) => {
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if (plugin.default) {
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plugin = plugin.default
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}
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if (plugin.postcss === true) {
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plugin = plugin()
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} else if (plugin.postcss) {
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plugin = plugin.postcss
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}
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if (
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// eslint-disable-next-line
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!(
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(typeof plugin === 'object' && Array.isArray(plugin.plugins)) ||
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(typeof plugin === 'object' && plugin.postcssPlugin) ||
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(typeof plugin === 'function')
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)
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) {
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throw new TypeError(`Invalid PostCSS Plugin found at: plugins[${i}]\n\n(@${file})`)
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}
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})
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}
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return plugins
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}
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module.exports = plugins
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