122 lines
No EOL
3.8 KiB
JavaScript
122 lines
No EOL
3.8 KiB
JavaScript
'use strict';
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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var _path = require('path');
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var _path2 = _interopRequireDefault(_path);
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var _postcss = require('postcss');
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var _postcss2 = _interopRequireDefault(_postcss);
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var _cosmiconfig = require('cosmiconfig');
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var _cosmiconfig2 = _interopRequireDefault(_cosmiconfig);
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var _isResolvable = require('is-resolvable');
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var _isResolvable2 = _interopRequireDefault(_isResolvable);
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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const cssnano = 'cssnano';
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function initializePlugin(plugin, css, result) {
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if (Array.isArray(plugin)) {
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const [processor, opts] = plugin;
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if (typeof opts === 'undefined' || typeof opts === 'object' && !opts.exclude || typeof opts === 'boolean' && opts === true) {
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return Promise.resolve(processor(opts)(css, result));
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}
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} else {
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return Promise.resolve(plugin()(css, result));
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}
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// Handle excluded plugins
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return Promise.resolve();
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}
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/*
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* preset can be one of four possibilities:
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* preset = 'default'
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* preset = ['default', {}]
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* preset = function <- to be invoked
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* preset = {plugins: []} <- already invoked function
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*/
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function resolvePreset(preset) {
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let fn, options;
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if (Array.isArray(preset)) {
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fn = preset[0];
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options = preset[1];
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} else {
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fn = preset;
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options = {};
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}
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// For JS setups where we invoked the preset already
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if (preset.plugins) {
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return Promise.resolve(preset.plugins);
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}
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// Provide an alias for the default preset, as it is built-in.
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if (fn === 'default') {
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return Promise.resolve(require('cssnano-preset-default')(options).plugins);
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}
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// For non-JS setups; we'll need to invoke the preset ourselves.
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if (typeof fn === 'function') {
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return Promise.resolve(fn(options).plugins);
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}
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// Try loading a preset from node_modules
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if ((0, _isResolvable2.default)(fn)) {
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return Promise.resolve(require(fn)(options).plugins);
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}
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const sugar = `cssnano-preset-${fn}`;
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// Try loading a preset from node_modules (sugar)
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if ((0, _isResolvable2.default)(sugar)) {
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return Promise.resolve(require(sugar)(options).plugins);
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}
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// If all else fails, we probably have a typo in the config somewhere
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throw new Error(`Cannot load preset "${fn}". Please check your configuration for errors and try again.`);
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}
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/*
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* cssnano will look for configuration firstly as options passed
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* directly to it, and failing this it will use cosmiconfig to
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* load an external file.
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*/
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function resolveConfig(css, result, options) {
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if (options.preset) {
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return resolvePreset(options.preset);
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}
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const inputFile = css.source && css.source.input && css.source.input.file;
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let searchPath = inputFile ? _path2.default.dirname(inputFile) : process.cwd();
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let configPath = null;
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if (options.configFile) {
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searchPath = null;
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configPath = _path2.default.resolve(process.cwd(), options.configFile);
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}
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const configExplorer = (0, _cosmiconfig2.default)(cssnano);
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const searchForConfig = configPath ? configExplorer.load(configPath) : configExplorer.search(searchPath);
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return searchForConfig.then(config => {
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if (config === null) {
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return resolvePreset('default');
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}
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return resolvePreset(config.config.preset || config.config);
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});
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}
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exports.default = _postcss2.default.plugin(cssnano, (options = {}) => {
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return (css, result) => {
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return resolveConfig(css, result, options).then(plugins => {
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return plugins.reduce((promise, plugin) => {
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return promise.then(initializePlugin.bind(null, plugin, css, result));
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}, Promise.resolve());
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});
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};
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});
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module.exports = exports['default']; |