Fix.

node_modules/ajv/lib/keyword.js

@@ -0,0 +1,146 @@
+'use strict';
+
+var IDENTIFIER = /^[a-z_$][a-z0-9_$-]*$/i;
+var customRuleCode = require('./dotjs/custom');
+var definitionSchema = require('./definition_schema');
+
+module.exports = {
+  add: addKeyword,
+  get: getKeyword,
+  remove: removeKeyword,
+  validate: validateKeyword
+};
+
+
+/**
+ * Define custom keyword
+ * @this  Ajv
+ * @param {String} keyword custom keyword, should be unique (including different from all standard, custom and macro keywords).
+ * @param {Object} definition keyword definition object with properties `type` (type(s) which the keyword applies to), `validate` or `compile`.
+ * @return {Ajv} this for method chaining
+ */
+function addKeyword(keyword, definition) {
+  /* jshint validthis: true */
+  /* eslint no-shadow: 0 */
+  var RULES = this.RULES;
+  if (RULES.keywords[keyword])
+    throw new Error('Keyword ' + keyword + ' is already defined');
+
+  if (!IDENTIFIER.test(keyword))
+    throw new Error('Keyword ' + keyword + ' is not a valid identifier');
+
+  if (definition) {
+    this.validateKeyword(definition, true);
+
+    var dataType = definition.type;
+    if (Array.isArray(dataType)) {
+      for (var i=0; i<dataType.length; i++)
+        _addRule(keyword, dataType[i], definition);
+    } else {
+      _addRule(keyword, dataType, definition);
+    }
+
+    var metaSchema = definition.metaSchema;
+    if (metaSchema) {
+      if (definition.$data && this._opts.$data) {
+        metaSchema = {
+          anyOf: [
+            metaSchema,
+            { '$ref': 'https://raw.githubusercontent.com/epoberezkin/ajv/master/lib/refs/data.json#' }
+          ]
+        };
+      }
+      definition.validateSchema = this.compile(metaSchema, true);
+    }
+  }
+
+  RULES.keywords[keyword] = RULES.all[keyword] = true;
+
+
+  function _addRule(keyword, dataType, definition) {
+    var ruleGroup;
+    for (var i=0; i<RULES.length; i++) {
+      var rg = RULES[i];
+      if (rg.type == dataType) {
+        ruleGroup = rg;
+        break;
+      }
+    }
+
+    if (!ruleGroup) {
+      ruleGroup = { type: dataType, rules: [] };
+      RULES.push(ruleGroup);
+    }
+
+    var rule = {
+      keyword: keyword,
+      definition: definition,
+      custom: true,
+      code: customRuleCode,
+      implements: definition.implements
+    };
+    ruleGroup.rules.push(rule);
+    RULES.custom[keyword] = rule;
+  }
+
+  return this;
+}
+
+
+/**
+ * Get keyword
+ * @this  Ajv
+ * @param {String} keyword pre-defined or custom keyword.
+ * @return {Object|Boolean} custom keyword definition, `true` if it is a predefined keyword, `false` otherwise.
+ */
+function getKeyword(keyword) {
+  /* jshint validthis: true */
+  var rule = this.RULES.custom[keyword];
+  return rule ? rule.definition : this.RULES.keywords[keyword] || false;
+}
+
+
+/**
+ * Remove keyword
+ * @this  Ajv
+ * @param {String} keyword pre-defined or custom keyword.
+ * @return {Ajv} this for method chaining
+ */
+function removeKeyword(keyword) {
+  /* jshint validthis: true */
+  var RULES = this.RULES;
+  delete RULES.keywords[keyword];
+  delete RULES.all[keyword];
+  delete RULES.custom[keyword];
+  for (var i=0; i<RULES.length; i++) {
+    var rules = RULES[i].rules;
+    for (var j=0; j<rules.length; j++) {
+      if (rules[j].keyword == keyword) {
+        rules.splice(j, 1);
+        break;
+      }
+    }
+  }
+  return this;
+}
+
+
+/**
+ * Validate keyword definition
+ * @this  Ajv
+ * @param {Object} definition keyword definition object.
+ * @param {Boolean} throwError true to throw exception if definition is invalid
+ * @return {boolean} validation result
+ */
+function validateKeyword(definition, throwError) {
+  validateKeyword.errors = null;
+  var v = this._validateKeyword = this._validateKeyword
+                                  || this.compile(definitionSchema, true);
+
+  if (v(definition)) return true;
+  validateKeyword.errors = v.errors;
+  if (throwError)
+    throw new Error('custom keyword definition is invalid: '  + this.errorsText(v.errors));
+  else
+    return false;
+}