Add checkChildContextTypes for forbid-prop-types

Author: jomasti

docs/rules/forbid-prop-types.md

@@ -44,7 +44,7 @@ class Component extends React.Component {
 
 ```js
 ...
-"react/forbid-prop-types": [<enabled>, { "forbid": [<string>], checkContextTypes: <boolean> }]
+"react/forbid-prop-types": [<enabled>, { "forbid": [<string>], checkContextTypes: <boolean>, checkChildContextTypes: <boolean> }]
 ...
 ```
 
@@ -56,6 +56,10 @@ An array of strings, with the names of `PropTypes` keys that are forbidden. The
 
 Whether or not to check `contextTypes` for forbidden prop types. The default value is false.
 
+### `checkChildContextTypes`
+
+Whether or not to check `childContextTypes` for forbidden prop types. The default value is false.
+
 ## When not to use
 
 This rule is a formatting/documenting preference and not following it won't negatively affect the quality of your code. This rule encourages prop types that more specifically document their usage.

lib/rules/forbid-prop-types.js

@@ -35,6 +35,9 @@ module.exports = {
         },
         checkContextTypes: {
           type: 'boolean'
+        },
+        checkChildContextTypes: {
+          type: 'boolean'
         }
       },
       additionalProperties: true
@@ -45,6 +48,7 @@ module.exports = {
     const propWrapperFunctions = new Set(context.settings.propWrapperFunctions || []);
     const configuration = context.options[0] || {};
     const checkContextTypes = configuration.checkContextTypes || false;
+    const checkChildContextTypes = configuration.checkChildContextTypes || false;
 
     function isForbidden(type) {
       const forbid = configuration.forbid || DEFAULTS;
@@ -58,6 +62,13 @@ module.exports = {
       return false;
     }
 
+    function shouldCheckChildContextTypes(node) {
+      if (checkChildContextTypes && propsUtil.isChildContextTypesDeclaration(node)) {
+        return true;
+      }
+      return false;
+    }
+
     /**
      * Find a variable by name in the current scope.
      * @param  {string} name Name of the variable to look for.
@@ -142,14 +153,22 @@ module.exports = {
 
     return {
       ClassProperty: function(node) {
-        if (!propsUtil.isPropTypesDeclaration(node) && !shouldCheckContextTypes(node)) {
+        if (
+          !propsUtil.isPropTypesDeclaration(node) &&
+          !shouldCheckContextTypes(node) &&
+          !shouldCheckChildContextTypes(node)
+        ) {
           return;
         }
         checkNode(node.value);
       },
 
       MemberExpression: function(node) {
-        if (!propsUtil.isPropTypesDeclaration(node) && !shouldCheckContextTypes(node)) {
+        if (
+          !propsUtil.isPropTypesDeclaration(node) &&
+          !shouldCheckContextTypes(node) &&
+          !shouldCheckChildContextTypes(node)
+        ) {
           return;
         }
 
@@ -162,7 +181,11 @@ module.exports = {
             return;
           }
 
-          if (!propsUtil.isPropTypesDeclaration(property) && !shouldCheckContextTypes(property)) {
+          if (
+            !propsUtil.isPropTypesDeclaration(property) &&
+            !shouldCheckContextTypes(property) &&
+            !shouldCheckChildContextTypes(property)
+          ) {
             return;
           }
           if (property.value.type === 'ObjectExpression') {

lib/util/props.js

@@ -35,6 +35,15 @@ function isContextTypesDeclaration(node) {
   return astUtil.getPropertyName(node) === 'contextTypes';
 }
 
+/**
+ * Checks if the node passed in looks like a childContextTypes declaration.
+ * @param {ASTNode} node The node to check.
+ * @returns {Boolean} `true` if the node is a childContextTypes declaration, `false` if not
+ */
+function isChildContextTypesDeclaration(node) {
+  return astUtil.getPropertyName(node) === 'childContextTypes';
+}
+
 /**
  * Checks if the Identifier node passed in looks like a defaultProps declaration.
  * @param {ASTNode} node The node to check. Must be an Identifier node.
@@ -57,6 +66,7 @@ function isRequiredPropType(propTypeExpression) {
 module.exports = {
   isPropTypesDeclaration: isPropTypesDeclaration,
   isContextTypesDeclaration: isContextTypesDeclaration,
+  isChildContextTypesDeclaration: isChildContextTypesDeclaration,
   isDefaultPropsDeclaration: isDefaultPropsDeclaration,
   isRequiredPropType: isRequiredPropType
 };