Add production dependencies

node_modules/rework-plugin-function/index.js

@@ -0,0 +1,102 @@
+
+/**
+ * Module dependencies.
+ */
+
+var visit = require('rework-visit');
+
+/**
+ * Define custom function.
+ */
+
+module.exports = function(functions, args) {
+  if (!functions) throw new Error('functions object required');
+  return function(style){
+    var functionMatcher = functionMatcherBuilder(Object.keys(functions).join('|'));
+
+    visit(style, function(declarations){
+      func(declarations, functions, functionMatcher, args);
+    });
+  }
+};
+
+/**
+ * Visit declarations and apply functions.
+ *
+ * @param {Array} declarations
+ * @param {Object} functions
+ * @param {RegExp} functionMatcher
+ * @param {Boolean} [parseArgs]
+ * @api private
+ */
+
+function func(declarations, functions, functionMatcher, parseArgs) {
+  if (!declarations) return;
+  if (false !== parseArgs) parseArgs = true;
+
+  declarations.forEach(function(decl){
+    if ('comment' == decl.type) return;
+    var generatedFuncs = [], result, generatedFunc;
+
+    while (decl.value.match(functionMatcher)) {
+      decl.value = decl.value.replace(functionMatcher, function(_, name, args){
+        if (parseArgs) {
+          args = args.split(/\s*,\s*/).map(strip);
+        } else {
+          args = [strip(args)];
+        }
+        // Ensure result is string
+        result = '' + functions[name].apply(decl, args);
+
+        // Prevent fall into infinite loop like this:
+        //
+        // {
+        //   url: function(path) {
+        //     return 'url(' + '/some/prefix' + path + ')'
+        //   }
+        // }
+        //
+        generatedFunc = {from: name, to: name + getRandomString()};
+        result = result.replace(functionMatcherBuilder(name), generatedFunc.to + '($2)');
+        generatedFuncs.push(generatedFunc);
+        return result;
+      });
+    }
+
+    generatedFuncs.forEach(function(func) {
+      decl.value = decl.value.replace(func.to, func.from);
+    })
+  });
+}
+
+/**
+ * Build function regexp
+ *
+ * @param {String} name
+ * @api private
+ */
+
+function functionMatcherBuilder(name) {
+  // /(?!\W+)(\w+)\(([^()]+)\)/
+  return new RegExp("(?!\\W+)(" + name + ")\\(([^\(\)]+)\\)");
+}
+
+/**
+ * get random string
+ *
+ * @api private
+ */
+
+function getRandomString() {
+  return Math.random().toString(36).slice(2);
+}
+
+/**
+ * strip quotes from string
+ * @api private
+ */
+
+function strip(str) {
+    if ('"' == str[0] || "'" == str[0]) return str.slice(1, -1);
+    return str;
+}