add some packages

node_modules/clean-css/lib/reader/extract-import-url-and-media.js

@@ -0,0 +1,35 @@
+var split = require('../utils/split');
+
+var BRACE_PREFIX = /^\(/;
+var BRACE_SUFFIX = /\)$/;
+var IMPORT_PREFIX_PATTERN = /^@import/i;
+var QUOTE_PREFIX_PATTERN = /['"]\s*/;
+var QUOTE_SUFFIX_PATTERN = /\s*['"]/;
+var URL_PREFIX_PATTERN = /^url\(\s*/i;
+var URL_SUFFIX_PATTERN = /\s*\)/i;
+
+function extractImportUrlAndMedia(atRuleValue) {
+  var uri;
+  var mediaQuery;
+  var stripped;
+  var parts;
+
+  stripped = atRuleValue
+    .replace(IMPORT_PREFIX_PATTERN, '')
+    .trim()
+    .replace(URL_PREFIX_PATTERN, '(')
+    .replace(URL_SUFFIX_PATTERN, ')')
+    .replace(QUOTE_PREFIX_PATTERN, '')
+    .replace(QUOTE_SUFFIX_PATTERN, '');
+
+  parts = split(stripped, ' ');
+
+  uri = parts[0]
+    .replace(BRACE_PREFIX, '')
+    .replace(BRACE_SUFFIX, '');
+  mediaQuery = parts.slice(1).join(' ');
+
+  return [uri, mediaQuery];
+}
+
+module.exports = extractImportUrlAndMedia;