Add rename-unsafe-lifecycles codemod

README.md

@@ -94,6 +94,14 @@ jscodeshift -t react-codemod/transforms/React-PropTypes-to-prop-types.js <path>
 
   * In addition to running the above codemod you will also need to install the 'prop-types' NPM package.
 
+#### `rename-unsafe-lifecycles`
+
+Adds "UNSAFE_" prefix for deprecated lifecycle hooks. (For more information about this codemod, see [React RFC #6](https://github.com/reactjs/rfcs/pull/6))
+
+```sh
+jscodeshift -t react-codemod/transforms/rename-unsafe-lifecycles.js <path>
+```
+
 #### `react-to-react-dom`
 
 Updates code for the split of the `react` and `react-dom` packages (e.g.,

transforms/__testfixtures__/rename-unsafe-lifecycles/arrow-functions.input.js

@@ -0,0 +1,14 @@
+const React = require('React');
+
+class Component extends React.Component {
+  componentWillMount = logger('componentWillMount');
+  componentDidMount = logger('componentDidMount');
+  componentWillReceiveProps = logger('componentWillReceiveProps');
+  shouldComponentUpdate = logger('shouldComponentUpdate');
+  componentWillUpdate = logger('componentWillUpdate');
+  componentDidUpdate = logger('componentDidUpdate');
+  componentWillUnmount = logger('componentWillUnmount');
+  render() {
+    return null;
+  }
+}

transforms/__testfixtures__/rename-unsafe-lifecycles/arrow-functions.output.js

@@ -0,0 +1,14 @@
+const React = require('React');
+
+class Component extends React.Component {
+  UNSAFE_componentWillMount = logger('componentWillMount');
+  componentDidMount = logger('componentDidMount');
+  UNSAFE_componentWillReceiveProps = logger('componentWillReceiveProps');
+  shouldComponentUpdate = logger('shouldComponentUpdate');
+  UNSAFE_componentWillUpdate = logger('componentWillUpdate');
+  componentDidUpdate = logger('componentDidUpdate');
+  componentWillUnmount = logger('componentWillUnmount');
+  render() {
+    return null;
+  }
+}

transforms/__testfixtures__/rename-unsafe-lifecycles/create-react-class.input.js

@@ -0,0 +1,48 @@
+const createReactClass = require('create-react-class');
+
+const MyComponent = createReactClass({
+  displayName: 'MyComponent',
+  mixins: [
+    {
+      componentWillMount() {
+        // componentWillMount
+      },
+      componentDidMount() {
+        // componentDidMount
+      },
+      componentWillUpdate(nextProps, nextState) {
+        // componentWillUpdate
+      },
+      componentDidUpdate(prevProps, prevState) {
+        // componentDidUpdate
+      },
+      componentWillReceiveProps(nextProps) {
+        // componentWillReceiveProps
+      },
+      componentWillUnmount() {
+        // componentWillUnmount
+      },
+    },
+  ],
+  componentWillMount() {
+    // componentWillMount
+  },
+  componentDidMount() {
+    // componentDidMount
+  },
+  componentWillUpdate(nextProps, nextState) {
+    // componentWillUpdate
+  },
+  componentDidUpdate(prevProps, prevState) {
+    // componentDidUpdate
+  },
+  componentWillReceiveProps(nextProps) {
+    // componentWillReceiveProps
+  },
+  componentWillUnmount() {
+    // componentWillUnmount
+  },
+  render() {
+    // render
+  },
+});

transforms/__testfixtures__/rename-unsafe-lifecycles/create-react-class.output.js

@@ -0,0 +1,48 @@
+const createReactClass = require('create-react-class');
+
+const MyComponent = createReactClass({
+  displayName: 'MyComponent',
+  mixins: [
+    {
+      UNSAFE_componentWillMount() {
+        // componentWillMount
+      },
+      componentDidMount() {
+        // componentDidMount
+      },
+      UNSAFE_componentWillUpdate(nextProps, nextState) {
+        // componentWillUpdate
+      },
+      componentDidUpdate(prevProps, prevState) {
+        // componentDidUpdate
+      },
+      UNSAFE_componentWillReceiveProps(nextProps) {
+        // componentWillReceiveProps
+      },
+      componentWillUnmount() {
+        // componentWillUnmount
+      },
+    },
+  ],
+  UNSAFE_componentWillMount() {
+    // componentWillMount
+  },
+  componentDidMount() {
+    // componentDidMount
+  },
+  UNSAFE_componentWillUpdate(nextProps, nextState) {
+    // componentWillUpdate
+  },
+  componentDidUpdate(prevProps, prevState) {
+    // componentDidUpdate
+  },
+  UNSAFE_componentWillReceiveProps(nextProps) {
+    // componentWillReceiveProps
+  },
+  componentWillUnmount() {
+    // componentWillUnmount
+  },
+  render() {
+    // render
+  },
+});

transforms/__testfixtures__/rename-unsafe-lifecycles/instance-methods.input.js

@@ -0,0 +1,25 @@
+const React = require('React');
+
+class ClassComponent extends React.Component {
+  componentWillMount() {
+    // componentWillMount
+  }
+  componentDidMount() {
+    // componentDidMount
+  }
+  componentWillUpdate(nextProps, nextState) {
+    // componentWillUpdate
+  }
+  componentDidUpdate(prevProps, prevState) {
+    // componentDidUpdate
+  }
+  componentWillReceiveProps(nextProps) {
+    // componentWillReceiveProps
+  }
+  componentWillUnmount() {
+    // componentWillUnmount
+  }
+  render() {
+    // render
+  }
+}

transforms/__testfixtures__/rename-unsafe-lifecycles/instance-methods.output.js

@@ -0,0 +1,25 @@
+const React = require('React');
+
+class ClassComponent extends React.Component {
+  UNSAFE_componentWillMount() {
+    // componentWillMount
+  }
+  componentDidMount() {
+    // componentDidMount
+  }
+  UNSAFE_componentWillUpdate(nextProps, nextState) {
+    // componentWillUpdate
+  }
+  componentDidUpdate(prevProps, prevState) {
+    // componentDidUpdate
+  }
+  UNSAFE_componentWillReceiveProps(nextProps) {
+    // componentWillReceiveProps
+  }
+  componentWillUnmount() {
+    // componentWillUnmount
+  }
+  render() {
+    // render
+  }
+}

transforms/__testfixtures__/rename-unsafe-lifecycles/standalone-function.input.js

@@ -0,0 +1,9 @@
+function componentWillMount() {
+  // componentWillMount
+}
+function componentWillUpdate(nextProps, nextState) {
+  // componentWillUpdate
+}
+function componentWillReceiveProps(nextProps) {
+  // componentWillReceiveProps
+}

transforms/__testfixtures__/rename-unsafe-lifecycles/variable-within-class-method.input.js

@@ -0,0 +1,7 @@
+class SomeClass {
+  someMethod() {
+    const componentWillMount = true;
+    let componentWillUpdate = 123;
+    var componentWillReceiveProps = 'abc';
+  }
+}

transforms/__tests__/rename-unsafe-lifecycles-test.js

@@ -0,0 +1,32 @@
+/**
+ * Copyright 2013-2015, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ *
+ */
+
+'use strict';
+
+const tests = [
+  'arrow-functions',
+  'create-react-class',
+  'instance-methods',
+  'standalone-function',
+  'variable-within-class-method',
+];
+
+const defineTest = require('jscodeshift/dist/testUtils').defineTest;
+
+describe('rename-unsafe-lifecycles', () => {
+  tests.forEach(test =>
+    defineTest(
+      __dirname,
+      'rename-unsafe-lifecycles',
+      null,
+      `rename-unsafe-lifecycles/${test}`
+    )
+  );
+});

transforms/rename-unsafe-lifecycles.js

@@ -0,0 +1,57 @@
+/**
+ * Copyright 2013-2015, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ *
+ */
+
+'use strict';
+
+const DEPRECATED_APIS = Object.create(null);
+DEPRECATED_APIS.componentWillMount = 'UNSAFE_componentWillMount';
+DEPRECATED_APIS.componentWillReceiveProps = 'UNSAFE_componentWillReceiveProps';
+DEPRECATED_APIS.componentWillUpdate = 'UNSAFE_componentWillUpdate';
+
+export default (file, api, options) => {
+  const j = api.jscodeshift;
+
+  const printOptions = options.printOptions || {
+    quote: 'single',
+    trailingComma: true,
+  };
+
+  const root = j(file.source);
+
+  let hasModifications = false;
+
+  const renameDeprecatedApis = path => {
+    const name = path.node.key.name;
+
+    if (DEPRECATED_APIS[name]) {
+      path.value.key.name = DEPRECATED_APIS[name];
+      hasModifications = true;
+    }
+  };
+
+  // Class methods
+  root
+    .find(j.MethodDefinition)
+    .forEach(renameDeprecatedApis);
+
+  // Arrow functions
+  root
+    .find(j.ClassProperty)
+    .forEach(renameDeprecatedApis);
+
+  // createReactClass and mixins
+  root
+    .find(j.Property)
+    .forEach(renameDeprecatedApis);
+
+  return hasModifications
+    ? root.toSource(printOptions)
+    : null;
+};