0.2.0 - Mid migration

web/node_modules/cssnano/dist/index.js

@@ -0,0 +1,122 @@
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+    value: true
+});
+
+var _path = require('path');
+
+var _path2 = _interopRequireDefault(_path);
+
+var _postcss = require('postcss');
+
+var _postcss2 = _interopRequireDefault(_postcss);
+
+var _cosmiconfig = require('cosmiconfig');
+
+var _cosmiconfig2 = _interopRequireDefault(_cosmiconfig);
+
+var _isResolvable = require('is-resolvable');
+
+var _isResolvable2 = _interopRequireDefault(_isResolvable);
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+const cssnano = 'cssnano';
+
+function initializePlugin(plugin, css, result) {
+    if (Array.isArray(plugin)) {
+        const [processor, opts] = plugin;
+        if (typeof opts === 'undefined' || typeof opts === 'object' && !opts.exclude || typeof opts === 'boolean' && opts === true) {
+            return Promise.resolve(processor(opts)(css, result));
+        }
+    } else {
+        return Promise.resolve(plugin()(css, result));
+    }
+    // Handle excluded plugins
+    return Promise.resolve();
+}
+
+/*
+ * preset can be one of four possibilities:
+ * preset = 'default'
+ * preset = ['default', {}]
+ * preset = function <- to be invoked
+ * preset = {plugins: []} <- already invoked function
+ */
+
+function resolvePreset(preset) {
+    let fn, options;
+    if (Array.isArray(preset)) {
+        fn = preset[0];
+        options = preset[1];
+    } else {
+        fn = preset;
+        options = {};
+    }
+    // For JS setups where we invoked the preset already
+    if (preset.plugins) {
+        return Promise.resolve(preset.plugins);
+    }
+    // Provide an alias for the default preset, as it is built-in.
+    if (fn === 'default') {
+        return Promise.resolve(require('cssnano-preset-default')(options).plugins);
+    }
+    // For non-JS setups; we'll need to invoke the preset ourselves.
+    if (typeof fn === 'function') {
+        return Promise.resolve(fn(options).plugins);
+    }
+    // Try loading a preset from node_modules
+    if ((0, _isResolvable2.default)(fn)) {
+        return Promise.resolve(require(fn)(options).plugins);
+    }
+    const sugar = `cssnano-preset-${fn}`;
+    // Try loading a preset from node_modules (sugar)
+    if ((0, _isResolvable2.default)(sugar)) {
+        return Promise.resolve(require(sugar)(options).plugins);
+    }
+    // If all else fails, we probably have a typo in the config somewhere
+    throw new Error(`Cannot load preset "${fn}". Please check your configuration for errors and try again.`);
+}
+
+/*
+ * cssnano will look for configuration firstly as options passed
+ * directly to it, and failing this it will use cosmiconfig to
+ * load an external file.
+ */
+
+function resolveConfig(css, result, options) {
+    if (options.preset) {
+        return resolvePreset(options.preset);
+    }
+
+    const inputFile = css.source && css.source.input && css.source.input.file;
+    let searchPath = inputFile ? _path2.default.dirname(inputFile) : process.cwd();
+    let configPath = null;
+
+    if (options.configFile) {
+        searchPath = null;
+        configPath = _path2.default.resolve(process.cwd(), options.configFile);
+    }
+
+    const configExplorer = (0, _cosmiconfig2.default)(cssnano);
+    const searchForConfig = configPath ? configExplorer.load(configPath) : configExplorer.search(searchPath);
+
+    return searchForConfig.then(config => {
+        if (config === null) {
+            return resolvePreset('default');
+        }
+        return resolvePreset(config.config.preset || config.config);
+    });
+}
+
+exports.default = _postcss2.default.plugin(cssnano, (options = {}) => {
+    return (css, result) => {
+        return resolveConfig(css, result, options).then(plugins => {
+            return plugins.reduce((promise, plugin) => {
+                return promise.then(initializePlugin.bind(null, plugin, css, result));
+            }, Promise.resolve());
+        });
+    };
+});
+module.exports = exports['default'];