From a82d5ad1e17cd64d3579aa207abfc18346ff0107 Mon Sep 17 00:00:00 2001
From: Jacky Efendi <jacky.efendi1@gmail.com>
Date: Fri, 10 Jan 2020 02:06:14 +0700
Subject: [PATCH] feat: add codemods to migrate from react-loadable (#463)

---
 .eslintignore                                 |   3 +-
 .prettierignore                               |   3 +-
 packages/codemod/README.md                    |  11 +
 packages/codemod/bin/main.js                  |  74 +++++
 packages/codemod/bin/utils/CodemodError.js    |   9 +
 packages/codemod/package.json                 |  35 +++
 ...oadable-component_arrow-no-params.input.js |   9 +
 ...adable-component_arrow-no-params.output.js |   7 +
 ...loadable-component_arrow-w-params.input.js |  15 +
 ...oadable-component_arrow-w-params.output.js |  17 ++
 ...adable-to-loadable-component_expr.input.js |  17 ++
 ...dable-to-loadable-component_expr.output.js |  19 ++
 ...act-loadable-to-loadable-component-test.js |   7 +
 .../react-loadable-to-loadable-component.js   | 129 ++++++++
 website/src/pages/docs/using-codemod.mdx      |  46 +++
 yarn.lock                                     | 284 +++++++++++++++++-
 16 files changed, 672 insertions(+), 13 deletions(-)
 create mode 100644 packages/codemod/README.md
 create mode 100755 packages/codemod/bin/main.js
 create mode 100644 packages/codemod/bin/utils/CodemodError.js
 create mode 100644 packages/codemod/package.json
 create mode 100644 packages/codemod/transforms/__testfixtures__/react-loadable-to-loadable-component_arrow-no-params.input.js
 create mode 100644 packages/codemod/transforms/__testfixtures__/react-loadable-to-loadable-component_arrow-no-params.output.js
 create mode 100644 packages/codemod/transforms/__testfixtures__/react-loadable-to-loadable-component_arrow-w-params.input.js
 create mode 100644 packages/codemod/transforms/__testfixtures__/react-loadable-to-loadable-component_arrow-w-params.output.js
 create mode 100644 packages/codemod/transforms/__testfixtures__/react-loadable-to-loadable-component_expr.input.js
 create mode 100644 packages/codemod/transforms/__testfixtures__/react-loadable-to-loadable-component_expr.output.js
 create mode 100644 packages/codemod/transforms/__tests__/react-loadable-to-loadable-component-test.js
 create mode 100644 packages/codemod/transforms/react-loadable-to-loadable-component.js
 create mode 100644 website/src/pages/docs/using-codemod.mdx

diff --git a/.eslintignore b/.eslintignore
index d6a14443..e16d6681 100644
--- a/.eslintignore
+++ b/.eslintignore
@@ -4,4 +4,5 @@ dist/
 lib/
 build/
 /website/.cache/
-/website/public/
\ No newline at end of file
+/website/public/
+__testfixtures__/
\ No newline at end of file
diff --git a/.prettierignore b/.prettierignore
index 5255f596..cf3f2a0d 100644
--- a/.prettierignore
+++ b/.prettierignore
@@ -6,4 +6,5 @@ CHANGELOG.md
 package.json
 lerna.json
 /website/.cache/
-/website/public/
\ No newline at end of file
+/website/public/
+__testfixtures__/
\ No newline at end of file
diff --git a/packages/codemod/README.md b/packages/codemod/README.md
new file mode 100644
index 00000000..36363a82
--- /dev/null
+++ b/packages/codemod/README.md
@@ -0,0 +1,11 @@
+# @loadable/codemod
+
+This package is a collection of codemod that can be used to help making big changes easier to a project, for example: migrating from `react-loadable` to `@loadable/component`
+
+## Notes about `react-loadable-to-loadable-component` transform
+`react-loadable-to-loadable-component` transform will help codemod all of your `Loadable()` declaration to `loadable()` with mostly equivalent params, barring some behavior that do not exist in `@loadable/component` such as `Loadable.Map()`, `timeout`, `delay`, etc.
+
+After running the codemod, you will still need to update some of your code manually, namely:
+1. Using `loadableReady` to hydrate your app on the client side.
+2. Updating your webpack configuration to use `@loadable`
+3. Updating your server side rendering code to use `ChunkExtractor`
diff --git a/packages/codemod/bin/main.js b/packages/codemod/bin/main.js
new file mode 100755
index 00000000..1266258e
--- /dev/null
+++ b/packages/codemod/bin/main.js
@@ -0,0 +1,74 @@
+#!/usr/bin/env node
+
+/* eslint-disable no-console */
+const yargs = require('yargs')
+const execa = require('execa')
+const path = require('path')
+const fs = require('fs')
+const chalk = require('chalk')
+const CodemodError = require('./utils/CodemodError')
+
+const jscodeshiftExecutable = require.resolve('.bin/jscodeshift')
+const transformsDir = path.resolve(__dirname, '../transforms')
+
+const { argv } = yargs
+
+try {
+  const selectedCodemod = argv._[0]
+  const directoryToApplyTo = argv._[1]
+
+  if (!selectedCodemod || !directoryToApplyTo) {
+    throw new CodemodError({
+      type: 'Invalid params',
+    })
+  }
+
+  const availableTransforms = fs
+    .readdirSync(transformsDir)
+    .filter(v => v !== '__tests__' && v !== '__testfixtures__')
+    .map(v => v.replace('.js', ''))
+
+  if (!availableTransforms.some(t => t === selectedCodemod)) {
+    throw new CodemodError({
+      type: 'Unrecognised transform',
+      payload: selectedCodemod,
+    })
+  }
+
+  const result = execa.commandSync(
+    `${jscodeshiftExecutable} --parser babylon -t ${transformsDir}/${selectedCodemod}.js ${directoryToApplyTo}`,
+    {
+      stdio: 'inherit',
+      stripEof: false,
+    },
+  )
+
+  if (result.error) {
+    throw result.error
+  }
+} catch (err) {
+  if (err.type === 'Invalid params') {
+    console.error(chalk.red('Invalid params passed!'))
+    console.error(
+      chalk.red(
+        'loadable-codemod requires 2 params to be passed, the name of the codemod, and a directory to apply the codemod to.',
+      ),
+    )
+    console.error(
+      chalk.red(
+        'Example: npx loadable-codemod react-loadable-to-loadable-component ./src/client',
+      ),
+    )
+
+    process.exit(1)
+  }
+
+  if (err.type === 'Unrecognised transform') {
+    console.error(chalk.red(`Unrecognised transform passed: '${err.payload}'`))
+
+    process.exit(2)
+  }
+
+  // For other errors, just re-throw it
+  throw err
+}
diff --git a/packages/codemod/bin/utils/CodemodError.js b/packages/codemod/bin/utils/CodemodError.js
new file mode 100644
index 00000000..a546e638
--- /dev/null
+++ b/packages/codemod/bin/utils/CodemodError.js
@@ -0,0 +1,9 @@
+class CodemodError extends Error {
+  constructor(args){
+      super(args);
+      this.type = args.type;
+      this.payload = args.payload;
+  }
+}
+
+module.exports = CodemodError;
\ No newline at end of file
diff --git a/packages/codemod/package.json b/packages/codemod/package.json
new file mode 100644
index 00000000..2215f572
--- /dev/null
+++ b/packages/codemod/package.json
@@ -0,0 +1,35 @@
+{
+  "name": "loadable-codemod",
+  "description": "Various codemods related to @loadable/components for easier migration/ugprades",
+  "version": "0.0.1",
+  "repository": "git@github.com:smooth-code/loadable-components.git",
+  "author": "Jacky Efendi <jacky.efendi1@gmail.com>",
+  "bin": {
+    "loadable-codemod": "./bin/main.js"
+  },
+  "publishConfig": {
+    "access": "public"
+  },
+  "keywords": [
+    "react",
+    "ssr",
+    "webpack",
+    "code-splitting",
+    "react-router",
+    "server-side-rendering",
+    "dynamic-import",
+    "react-loadable",
+    "react-async-components",
+    "codemod"
+  ],
+  "engines": {
+    "node": ">=8"
+  },
+  "license": "MIT",
+  "dependencies": {
+    "chalk": "^3.0.0",
+    "execa": "^3.3.0",
+    "jscodeshift": "0.6.4",
+    "yargs": "^14.2.0"
+  }
+}
diff --git a/packages/codemod/transforms/__testfixtures__/react-loadable-to-loadable-component_arrow-no-params.input.js b/packages/codemod/transforms/__testfixtures__/react-loadable-to-loadable-component_arrow-no-params.input.js
new file mode 100644
index 00000000..9e5426e8
--- /dev/null
+++ b/packages/codemod/transforms/__testfixtures__/react-loadable-to-loadable-component_arrow-no-params.input.js
@@ -0,0 +1,9 @@
+/* eslint-disable */
+import Loadable from 'react-loadable'
+
+const CustomLinkLoadable = Loadable({
+  loader: () =>
+    import(/* webpackChunkName: "custom-link" */ '@components/CustomLink/Link'),
+  loading: () => <div>loading...</div>,
+  delay: 0,
+})
diff --git a/packages/codemod/transforms/__testfixtures__/react-loadable-to-loadable-component_arrow-no-params.output.js b/packages/codemod/transforms/__testfixtures__/react-loadable-to-loadable-component_arrow-no-params.output.js
new file mode 100644
index 00000000..eb3497db
--- /dev/null
+++ b/packages/codemod/transforms/__testfixtures__/react-loadable-to-loadable-component_arrow-no-params.output.js
@@ -0,0 +1,7 @@
+/* eslint-disable */
+import loadable from '@loadable/component'
+
+const CustomLinkLoadable = loadable(() =>
+  import(/* webpackChunkName: "custom-link" */ '@components/CustomLink/Link'), {
+  fallback: (() => <div>loading...</div>)(),
+})
diff --git a/packages/codemod/transforms/__testfixtures__/react-loadable-to-loadable-component_arrow-w-params.input.js b/packages/codemod/transforms/__testfixtures__/react-loadable-to-loadable-component_arrow-w-params.input.js
new file mode 100644
index 00000000..4f06c5f4
--- /dev/null
+++ b/packages/codemod/transforms/__testfixtures__/react-loadable-to-loadable-component_arrow-w-params.input.js
@@ -0,0 +1,15 @@
+/* eslint-disable */
+import Loadable from 'react-loadable'
+
+const CustomLinkLoadable = Loadable({
+  loader: () =>
+    import(/* webpackChunkName: "custom-link" */ '@components/CustomLink/Link'),
+  loading: (props) => {
+    if (props.error || props.timedOut) {
+      throw new Error('Failed to load custom link chunk')
+    } else if (props.loading) {
+      return <div>loading...</div>;
+    }
+  },
+  delay: 0,
+})
diff --git a/packages/codemod/transforms/__testfixtures__/react-loadable-to-loadable-component_arrow-w-params.output.js b/packages/codemod/transforms/__testfixtures__/react-loadable-to-loadable-component_arrow-w-params.output.js
new file mode 100644
index 00000000..30aa50a9
--- /dev/null
+++ b/packages/codemod/transforms/__testfixtures__/react-loadable-to-loadable-component_arrow-w-params.output.js
@@ -0,0 +1,17 @@
+/* eslint-disable */
+import loadable from '@loadable/component'
+
+const CustomLinkLoadable = loadable(() =>
+  import(/* webpackChunkName: "custom-link" */ '@components/CustomLink/Link'), {
+  fallback: (props => {
+    if (props.error || props.timedOut) {
+      throw new Error('Failed to load custom link chunk')
+    } else if (props.loading) {
+      return <div>loading...</div>;
+    }
+  })({
+    pastDelay: true,
+    error: false,
+    timedOut: false,
+  }),
+})
diff --git a/packages/codemod/transforms/__testfixtures__/react-loadable-to-loadable-component_expr.input.js b/packages/codemod/transforms/__testfixtures__/react-loadable-to-loadable-component_expr.input.js
new file mode 100644
index 00000000..fad3f56f
--- /dev/null
+++ b/packages/codemod/transforms/__testfixtures__/react-loadable-to-loadable-component_expr.input.js
@@ -0,0 +1,17 @@
+/* eslint-disable */
+import Loadable from 'react-loadable'
+
+const Loading = props => {
+  if (props.error || props.timedOut) {
+    throw new Error('Failed to load custom link chunk')
+  } else {
+    return null
+  }
+}
+
+const CustomLinkLoadable = Loadable({
+  loader: () =>
+    import(/* webpackChunkName: "custom-link" */ '@components/CustomLink/Link'),
+  loading: Loading,
+  delay: 0,
+})
diff --git a/packages/codemod/transforms/__testfixtures__/react-loadable-to-loadable-component_expr.output.js b/packages/codemod/transforms/__testfixtures__/react-loadable-to-loadable-component_expr.output.js
new file mode 100644
index 00000000..64d225b1
--- /dev/null
+++ b/packages/codemod/transforms/__testfixtures__/react-loadable-to-loadable-component_expr.output.js
@@ -0,0 +1,19 @@
+/* eslint-disable */
+import loadable from '@loadable/component'
+
+const Loading = props => {
+  if (props.error || props.timedOut) {
+    throw new Error('Failed to load custom link chunk')
+  } else {
+    return null
+  }
+}
+
+const CustomLinkLoadable = loadable(() =>
+  import(/* webpackChunkName: "custom-link" */ '@components/CustomLink/Link'), {
+  fallback: Loading({
+    pastDelay: true,
+    error: false,
+    timedOut: false,
+  }),
+})
diff --git a/packages/codemod/transforms/__tests__/react-loadable-to-loadable-component-test.js b/packages/codemod/transforms/__tests__/react-loadable-to-loadable-component-test.js
new file mode 100644
index 00000000..5d7109ab
--- /dev/null
+++ b/packages/codemod/transforms/__tests__/react-loadable-to-loadable-component-test.js
@@ -0,0 +1,7 @@
+jest.autoMockOff();
+
+const { defineTest } = require('jscodeshift/dist/testUtils');
+
+defineTest(__dirname, 'react-loadable-to-loadable-component', null, 'react-loadable-to-loadable-component_expr');
+defineTest(__dirname, 'react-loadable-to-loadable-component', null, 'react-loadable-to-loadable-component_arrow-no-params');
+defineTest(__dirname, 'react-loadable-to-loadable-component', null, 'react-loadable-to-loadable-component_arrow-w-params');
\ No newline at end of file
diff --git a/packages/codemod/transforms/react-loadable-to-loadable-component.js b/packages/codemod/transforms/react-loadable-to-loadable-component.js
new file mode 100644
index 00000000..70cbba32
--- /dev/null
+++ b/packages/codemod/transforms/react-loadable-to-loadable-component.js
@@ -0,0 +1,129 @@
+/* eslint-disable no-param-reassign */
+/* eslint-disable no-console */
+const chalk = require('chalk')
+
+const invokeWithMockedUpProp = (jscodeshift, file, prop) => {
+  // We invoke the function previously passed as `loading` to react-loadable with this props
+  // {
+  //   pastDelay: true,
+  //   error: false,
+  //   timedOut: false,
+  // }
+  const j = jscodeshift
+
+  const defaultPropsObjProperties = []
+
+  defaultPropsObjProperties.push(
+    j.objectProperty(j.identifier('pastDelay'), j.booleanLiteral(true)),
+  )
+  defaultPropsObjProperties.push(
+    j.objectProperty(j.identifier('error'), j.booleanLiteral(false)),
+  )
+  defaultPropsObjProperties.push(
+    j.objectProperty(j.identifier('timedOut'), j.booleanLiteral(false)),
+  )
+
+  const defaultPropsObj = j.objectExpression(defaultPropsObjProperties)
+
+  const callExpr = j.callExpression(prop.value, [defaultPropsObj])
+
+  prop.value = callExpr
+
+  console.warn(
+    chalk.yellow(
+      `[WARN] '${file.path}' has some react-loadable specific logic in it. We could not codemod while keeping all the behaviors the same. Please check this file manually.`,
+    ),
+  )
+}
+
+export default (file, api) => {
+  const { source } = file
+  const { jscodeshift: j } = api
+
+  const root = j(source)
+
+  // Rename `import Loadable from 'react-loadable';` to `import loadable from '@loadable/component';
+  root.find(j.ImportDeclaration).forEach(({ node }) => {
+    if (
+      node.specifiers[0] &&
+      node.specifiers[0].local.name === 'Loadable' &&
+      node.source.value === 'react-loadable'
+    ) {
+      node.specifiers[0].local.name = 'loadable'
+      node.source.value = '@loadable/component'
+    }
+  })
+
+  // Change Loadable({ ... }) invocation to loadable(() => {}, { ... }) invocation
+  root
+    .find(j.CallExpression, { callee: { name: 'Loadable' } })
+    .forEach(path => {
+      const { node } = path
+      const initialArgsProps = node.arguments[0].properties
+      let loader // this will be a function returning a dynamic import promise
+
+      // loop through the first argument (object) passed to `Loadable({ ... })`
+      const newProps = initialArgsProps
+        .map(prop => {
+          if (prop.key.name === 'loader') {
+            /**
+             * In react-loadable, this is the function that returns a dynamic import
+             * We'll keep it to `loader` variable for now, and remove it from the arg object
+             */
+            loader = prop.value
+
+            return undefined
+          }
+
+          if (prop.key.name === 'loading') {
+            prop.key.name = 'fallback' // rename to fallback
+
+            /**
+             * react-loadable accepts a Function that returns JSX as the `loading` arg.
+             * @loadable/component accepts a React.Element (what returned from React.createElement() calls)
+             *
+             */
+            if (prop.value.type === 'ArrowFunctionExpression') {
+              // if it's an ArrowFunctionExpression like `() => <div>loading...</div>`,
+
+              if (
+                (prop.value.params && prop.value.params.length > 0) ||
+                prop.value.type === 'Identifier'
+              ) {
+                // If the function accept props, we can invoke it and pass it a mocked-up props to get the component to
+                // a should-be-acceptable default state, while also logs out a warning.
+                // {
+                //   pastDelay: true,
+                //   error: false,
+                //   timedOut: false,
+                // }
+
+                invokeWithMockedUpProp(j, file, prop)
+              } else {
+                // If the function doesn't accept any params, we can safely just invoke it directly
+                // we can change it to `(() => <div>loading...</div>)()`
+                const callExpr = j.callExpression(prop.value, [])
+
+                prop.value = callExpr
+              }
+            } else if (prop.value.type === 'Identifier') {
+              // if it's an identifier like `Loading`, let's just invoke it with a mocked-up props
+              invokeWithMockedUpProp(j, file, prop)
+            }
+
+            return prop
+          }
+
+          // for all other props, just remove them
+          return undefined
+        })
+        .filter(Boolean)
+
+      // add the function that return a dynamic import we stored earlier as the first argument to `loadable()` call
+      node.arguments.unshift(loader)
+      node.arguments[1].properties = newProps
+      node.callee.name = 'loadable'
+    })
+
+  return root.toSource({ quote: 'single', trailingComma: true })
+}
diff --git a/website/src/pages/docs/using-codemod.mdx b/website/src/pages/docs/using-codemod.mdx
new file mode 100644
index 00000000..eca8dc1d
--- /dev/null
+++ b/website/src/pages/docs/using-codemod.mdx
@@ -0,0 +1,46 @@
+---
+menu: Guides
+title: Using Codemod
+order: 90
+---
+
+# Using Codemod
+
+Codemods are tools that can help us make changes in our code automatically. Think of it like 'find and replace', but more flexible. 
+
+Loadable provides `loadable-codemod` to help with some use cases. 
+For example, you can use `loadable-codemod` to help you migrate from another react code-splitting library to `@loadable/components`. 
+Simply run the following to get started.
+```
+npx loadable-codemod [name-of-transform] [path-to-your-project]
+```
+
+For now, only 1 transform is available, which is: `react-loadable-to-loadable-component`.
+
+## Transforms
+### react-loadable-to-loadable-component
+This transformation helps you make the changes necessary to update your codebase that is using [`react-loadable`](https://github.com/jamiebuilds/react-loadable) to `@loadable/component`.
+
+#### Usage 
+```sh
+npx loadable-codemod react-loadable-to-loadable-component ./client/src
+```
+#### Caveats
+Since `react-loadable` and `@loadable/component` do have differences, it is not possible to make a 100% fully automated codemod to handle all of the change needed.
+You still need to set up server-side rendering yourself.
+  - Updating your server side rendering code to use `ChunkExtractor`
+  - Updating your webpack configuration to use `@loadable`
+  - Using `loadableReady` to hydrate your app on the client side.
+
+Please also note that `react-loadable` comes with stuffs like `Loadable.Map`, `pastDelay`, `timedOut`, `delay`, etc that do not exist in `@loadable/components`.
+If your code were using those features, you will still need to migrate them manually. 
+
+For `loading` placeholder, this codemod already tries to render the loader as usual, but with a mocked up props as follows:
+```javascript
+{
+  pastDelay: true,
+  error: false,
+  timedOut: false,
+}
+```
+Your app should still works, but this means some of your app logic will be lost because `@loadable/component` simply does not support these features out of the box yet. 
diff --git a/yarn.lock b/yarn.lock
index b6cc6410..b4d848d1 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -25,7 +25,7 @@
   dependencies:
     "@babel/highlight" "^7.0.0"
 
-"@babel/core@^7.1.0", "@babel/core@^7.7.4":
+"@babel/core@^7.1.0", "@babel/core@^7.1.6", "@babel/core@^7.7.4":
   version "7.7.5"
   resolved "https://registry.yarnpkg.com/@babel/core/-/core-7.7.5.tgz#ae1323cd035b5160293307f50647e83f8ba62f7e"
   integrity sha512-M42+ScN4+1S9iB6f+TL7QBpoQETxbclx+KNoKJABghnKYE+fMzSGqst0BZJc8CpI625bwPwYgUyRvxZ+0mZzpw==
@@ -269,7 +269,7 @@
     regenerator-runtime "^0.13.3"
     v8flags "^3.1.1"
 
-"@babel/parser@^7.0.0", "@babel/parser@^7.1.0", "@babel/parser@^7.4.3", "@babel/parser@^7.7.4", "@babel/parser@^7.7.5":
+"@babel/parser@^7.0.0", "@babel/parser@^7.1.0", "@babel/parser@^7.1.6", "@babel/parser@^7.4.3", "@babel/parser@^7.7.4", "@babel/parser@^7.7.5":
   version "7.7.5"
   resolved "https://registry.yarnpkg.com/@babel/parser/-/parser-7.7.5.tgz#cbf45321619ac12d83363fcf9c94bb67fa646d71"
   integrity sha512-KNlOe9+/nk4i29g0VXgl8PEXIRms5xKLJeuZ6UptN0fHv+jDiriG+y94X6qAgWTR0h3KaoM1wK5G5h7MHFRSig==
@@ -283,7 +283,7 @@
     "@babel/helper-remap-async-to-generator" "^7.7.4"
     "@babel/plugin-syntax-async-generators" "^7.7.4"
 
-"@babel/plugin-proposal-class-properties@^7.7.4":
+"@babel/plugin-proposal-class-properties@^7.1.0", "@babel/plugin-proposal-class-properties@^7.7.4":
   version "7.7.4"
   resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-class-properties/-/plugin-proposal-class-properties-7.7.4.tgz#2f964f0cb18b948450362742e33e15211e77c2ba"
   integrity sha512-EcuXeV4Hv1X3+Q1TsuOmyyxeTRiSqurGJ26+I/FW1WbymmRRapVORm6x1Zl3iDIHyRxEs+VXWp6qnlcfcJSbbw==
@@ -307,7 +307,7 @@
     "@babel/helper-plugin-utils" "^7.0.0"
     "@babel/plugin-syntax-json-strings" "^7.7.4"
 
-"@babel/plugin-proposal-object-rest-spread@^7.7.4":
+"@babel/plugin-proposal-object-rest-spread@^7.0.0", "@babel/plugin-proposal-object-rest-spread@^7.7.4":
   version "7.7.4"
   resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-object-rest-spread/-/plugin-proposal-object-rest-spread-7.7.4.tgz#cc57849894a5c774214178c8ab64f6334ec8af71"
   integrity sha512-rnpnZR3/iWKmiQyJ3LKJpSwLDcX/nSXhdLk4Aq/tXOApIvyu7qoabrige0ylsAJffaUC51WiBu209Q0U+86OWQ==
@@ -345,6 +345,13 @@
   dependencies:
     "@babel/helper-plugin-utils" "^7.0.0"
 
+"@babel/plugin-syntax-flow@^7.7.4":
+  version "7.7.4"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-flow/-/plugin-syntax-flow-7.7.4.tgz#6d91b59e1a0e4c17f36af2e10dd64ef220919d7b"
+  integrity sha512-2AMAWl5PsmM5KPkB22cvOkUyWk6MjUaqhHNU5nSPUl/ns3j5qLfw2SuYP5RbVZ0tfLvePr4zUScbICtDP2CUNw==
+  dependencies:
+    "@babel/helper-plugin-utils" "^7.0.0"
+
 "@babel/plugin-syntax-json-strings@^7.7.4":
   version "7.7.4"
   resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-json-strings/-/plugin-syntax-json-strings-7.7.4.tgz#86e63f7d2e22f9e27129ac4e83ea989a382e86cc"
@@ -380,6 +387,13 @@
   dependencies:
     "@babel/helper-plugin-utils" "^7.0.0"
 
+"@babel/plugin-syntax-typescript@^7.7.4":
+  version "7.7.4"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-typescript/-/plugin-syntax-typescript-7.7.4.tgz#5d037ffa10f3b25a16f32570ebbe7a8c2efa304b"
+  integrity sha512-77blgY18Hud4NM1ggTA8xVT/dBENQf17OpiToSa2jSmEY3fWXD2jwrdVlO4kq5yzUTeF15WSQ6b4fByNvJcjpQ==
+  dependencies:
+    "@babel/helper-plugin-utils" "^7.0.0"
+
 "@babel/plugin-transform-arrow-functions@^7.7.4":
   version "7.7.4"
   resolved "https://registry.yarnpkg.com/@babel/plugin-transform-arrow-functions/-/plugin-transform-arrow-functions-7.7.4.tgz#76309bd578addd8aee3b379d809c802305a98a12"
@@ -462,6 +476,14 @@
     "@babel/helper-builder-binary-assignment-operator-visitor" "^7.7.4"
     "@babel/helper-plugin-utils" "^7.0.0"
 
+"@babel/plugin-transform-flow-strip-types@^7.7.4":
+  version "7.7.4"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-flow-strip-types/-/plugin-transform-flow-strip-types-7.7.4.tgz#cc73f85944782df1d77d80977bc097920a8bf31a"
+  integrity sha512-w9dRNlHY5ElNimyMYy0oQowvQpwt/PRHI0QS98ZJCTZU2bvSnKXo5zEiD5u76FBPigTm8TkqzmnUTg16T7qbkA==
+  dependencies:
+    "@babel/helper-plugin-utils" "^7.0.0"
+    "@babel/plugin-syntax-flow" "^7.7.4"
+
 "@babel/plugin-transform-for-of@^7.7.4":
   version "7.7.4"
   resolved "https://registry.yarnpkg.com/@babel/plugin-transform-for-of/-/plugin-transform-for-of-7.7.4.tgz#248800e3a5e507b1f103d8b4ca998e77c63932bc"
@@ -658,6 +680,15 @@
   dependencies:
     "@babel/helper-plugin-utils" "^7.0.0"
 
+"@babel/plugin-transform-typescript@^7.7.4":
+  version "7.7.4"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-typescript/-/plugin-transform-typescript-7.7.4.tgz#2974fd05f4e85c695acaf497f432342de9fc0636"
+  integrity sha512-X8e3tcPEKnwwPVG+vP/vSqEShkwODOEeyQGod82qrIuidwIrfnsGn11qPM1jBLF4MqguTXXYzm58d0dY+/wdpg==
+  dependencies:
+    "@babel/helper-create-class-features-plugin" "^7.7.4"
+    "@babel/helper-plugin-utils" "^7.0.0"
+    "@babel/plugin-syntax-typescript" "^7.7.4"
+
 "@babel/plugin-transform-unicode-regex@^7.7.4":
   version "7.7.4"
   resolved "https://registry.yarnpkg.com/@babel/plugin-transform-unicode-regex/-/plugin-transform-unicode-regex-7.7.4.tgz#a3c0f65b117c4c81c5b6484f2a5e7b95346b83ae"
@@ -666,6 +697,63 @@
     "@babel/helper-create-regexp-features-plugin" "^7.7.4"
     "@babel/helper-plugin-utils" "^7.0.0"
 
+"@babel/preset-env@^7.1.6":
+  version "7.7.6"
+  resolved "https://registry.yarnpkg.com/@babel/preset-env/-/preset-env-7.7.6.tgz#39ac600427bbb94eec6b27953f1dfa1d64d457b2"
+  integrity sha512-k5hO17iF/Q7tR9Jv8PdNBZWYW6RofxhnxKjBMc0nG4JTaWvOTiPoO/RLFwAKcA4FpmuBFm6jkoqaRJLGi0zdaQ==
+  dependencies:
+    "@babel/helper-module-imports" "^7.7.4"
+    "@babel/helper-plugin-utils" "^7.0.0"
+    "@babel/plugin-proposal-async-generator-functions" "^7.7.4"
+    "@babel/plugin-proposal-dynamic-import" "^7.7.4"
+    "@babel/plugin-proposal-json-strings" "^7.7.4"
+    "@babel/plugin-proposal-object-rest-spread" "^7.7.4"
+    "@babel/plugin-proposal-optional-catch-binding" "^7.7.4"
+    "@babel/plugin-proposal-unicode-property-regex" "^7.7.4"
+    "@babel/plugin-syntax-async-generators" "^7.7.4"
+    "@babel/plugin-syntax-dynamic-import" "^7.7.4"
+    "@babel/plugin-syntax-json-strings" "^7.7.4"
+    "@babel/plugin-syntax-object-rest-spread" "^7.7.4"
+    "@babel/plugin-syntax-optional-catch-binding" "^7.7.4"
+    "@babel/plugin-syntax-top-level-await" "^7.7.4"
+    "@babel/plugin-transform-arrow-functions" "^7.7.4"
+    "@babel/plugin-transform-async-to-generator" "^7.7.4"
+    "@babel/plugin-transform-block-scoped-functions" "^7.7.4"
+    "@babel/plugin-transform-block-scoping" "^7.7.4"
+    "@babel/plugin-transform-classes" "^7.7.4"
+    "@babel/plugin-transform-computed-properties" "^7.7.4"
+    "@babel/plugin-transform-destructuring" "^7.7.4"
+    "@babel/plugin-transform-dotall-regex" "^7.7.4"
+    "@babel/plugin-transform-duplicate-keys" "^7.7.4"
+    "@babel/plugin-transform-exponentiation-operator" "^7.7.4"
+    "@babel/plugin-transform-for-of" "^7.7.4"
+    "@babel/plugin-transform-function-name" "^7.7.4"
+    "@babel/plugin-transform-literals" "^7.7.4"
+    "@babel/plugin-transform-member-expression-literals" "^7.7.4"
+    "@babel/plugin-transform-modules-amd" "^7.7.5"
+    "@babel/plugin-transform-modules-commonjs" "^7.7.5"
+    "@babel/plugin-transform-modules-systemjs" "^7.7.4"
+    "@babel/plugin-transform-modules-umd" "^7.7.4"
+    "@babel/plugin-transform-named-capturing-groups-regex" "^7.7.4"
+    "@babel/plugin-transform-new-target" "^7.7.4"
+    "@babel/plugin-transform-object-super" "^7.7.4"
+    "@babel/plugin-transform-parameters" "^7.7.4"
+    "@babel/plugin-transform-property-literals" "^7.7.4"
+    "@babel/plugin-transform-regenerator" "^7.7.5"
+    "@babel/plugin-transform-reserved-words" "^7.7.4"
+    "@babel/plugin-transform-shorthand-properties" "^7.7.4"
+    "@babel/plugin-transform-spread" "^7.7.4"
+    "@babel/plugin-transform-sticky-regex" "^7.7.4"
+    "@babel/plugin-transform-template-literals" "^7.7.4"
+    "@babel/plugin-transform-typeof-symbol" "^7.7.4"
+    "@babel/plugin-transform-unicode-regex" "^7.7.4"
+    "@babel/types" "^7.7.4"
+    browserslist "^4.6.0"
+    core-js-compat "^3.4.7"
+    invariant "^2.2.2"
+    js-levenshtein "^1.1.3"
+    semver "^5.5.0"
+
 "@babel/preset-env@^7.7.4":
   version "7.7.5"
   resolved "https://registry.yarnpkg.com/@babel/preset-env/-/preset-env-7.7.5.tgz#f28573ed493edb4ba763b37fb4fbb85601469370"
@@ -723,6 +811,14 @@
     js-levenshtein "^1.1.3"
     semver "^5.5.0"
 
+"@babel/preset-flow@^7.0.0":
+  version "7.7.4"
+  resolved "https://registry.yarnpkg.com/@babel/preset-flow/-/preset-flow-7.7.4.tgz#99c1349b6fd7132783196de181e6b32d0949427e"
+  integrity sha512-6LbUqcHD8BcRtXMOp5bc5nJeU8RlKh6q5U8TgZeCrf9ebBdW8Wyy5ujAUnbJfmzQ56Kkq5XtwErC/5+5RHyFYA==
+  dependencies:
+    "@babel/helper-plugin-utils" "^7.0.0"
+    "@babel/plugin-transform-flow-strip-types" "^7.7.4"
+
 "@babel/preset-react@^7.7.4":
   version "7.7.4"
   resolved "https://registry.yarnpkg.com/@babel/preset-react/-/preset-react-7.7.4.tgz#3fe2ea698d8fb536d8e7881a592c3c1ee8bf5707"
@@ -734,7 +830,15 @@
     "@babel/plugin-transform-react-jsx-self" "^7.7.4"
     "@babel/plugin-transform-react-jsx-source" "^7.7.4"
 
-"@babel/register@^7.7.4":
+"@babel/preset-typescript@^7.1.0":
+  version "7.7.4"
+  resolved "https://registry.yarnpkg.com/@babel/preset-typescript/-/preset-typescript-7.7.4.tgz#780059a78e6fa7f7a4c87f027292a86b31ce080a"
+  integrity sha512-rqrjxfdiHPsnuPur0jKrIIGQCIgoTWMTjlbWE69G4QJ6TIOVnnRnIJhUxNTL/VwDmEAVX08Tq3B1nirer5341w==
+  dependencies:
+    "@babel/helper-plugin-utils" "^7.0.0"
+    "@babel/plugin-transform-typescript" "^7.7.4"
+
+"@babel/register@^7.0.0", "@babel/register@^7.7.4":
   version "7.7.4"
   resolved "https://registry.yarnpkg.com/@babel/register/-/register-7.7.4.tgz#45a4956471a9df3b012b747f5781cc084ee8f128"
   integrity sha512-/fmONZqL6ZMl9KJUYajetCrID6m0xmL4odX7v+Xvoxcv0DdbP/oO0TWIeLUCHqczQ6L6njDMqmqHFy2cp3FFsA==
@@ -1846,6 +1950,11 @@
   dependencies:
     "@babel/types" "^7.3.0"
 
+"@types/color-name@^1.1.1":
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/@types/color-name/-/color-name-1.1.1.tgz#1c1261bbeaa10a8055bbc5d8ab84b7b2afc846a0"
+  integrity sha512-rr+OQyAjxze7GgWrSaJwydHStIhHq2lvY3BOC2Mj7KnzI7XK0Uw1TOOdI9lDoajEbSWLiYgoo4f1R51erQfhPQ==
+
 "@types/estree@*":
   version "0.0.40"
   resolved "https://registry.yarnpkg.com/@types/estree/-/estree-0.0.40.tgz#0e6cb9b9bbd098031fa19e4b4e8131bc70e5de13"
@@ -2255,6 +2364,14 @@ ansi-styles@^3.1.0, ansi-styles@^3.2.0, ansi-styles@^3.2.1:
   dependencies:
     color-convert "^1.9.0"
 
+ansi-styles@^4.1.0:
+  version "4.2.0"
+  resolved "https://registry.yarnpkg.com/ansi-styles/-/ansi-styles-4.2.0.tgz#5681f0dcf7ae5880a7841d8831c4724ed9cc0172"
+  integrity sha512-7kFQgnEaMdRtwf6uSfUnVr9gSGC7faurn+J/Mv90/W+iTtN0405/nLdopfMWwchyxhbGYl6TC4Sccn9TUkGAgg==
+  dependencies:
+    "@types/color-name" "^1.1.1"
+    color-convert "^2.0.1"
+
 any-promise@^1.0.0:
   version "1.3.0"
   resolved "https://registry.yarnpkg.com/any-promise/-/any-promise-1.3.0.tgz#abc6afeedcea52e809cdc0376aed3ce39635d17f"
@@ -2410,6 +2527,11 @@ ast-types-flow@0.0.7, ast-types-flow@^0.0.7:
   resolved "https://registry.yarnpkg.com/ast-types-flow/-/ast-types-flow-0.0.7.tgz#f70b735c6bca1a5c9c22d982c3e39e7feba3bdad"
   integrity sha1-9wtzXGvKGlycItmCw+Oef+ujva0=
 
+ast-types@0.11.7:
+  version "0.11.7"
+  resolved "https://registry.yarnpkg.com/ast-types/-/ast-types-0.11.7.tgz#f318bf44e339db6a320be0009ded64ec1471f46c"
+  integrity sha512-2mP3TwtkY/aTv5X3ZsMpNAbOnyoC/aMJwJSoaELPkHId0nSQgFcnU4dRW3isxiz7+zBexk0ym3WNVjMiQBnJSw==
+
 astral-regex@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/astral-regex/-/astral-regex-1.0.0.tgz#6c8c3fb827dd43ee3918f27b82782ab7658a6fd9"
@@ -2934,6 +3056,14 @@ chalk@^2.0.0, chalk@^2.0.1, chalk@^2.1.0, chalk@^2.3.1, chalk@^2.4.1, chalk@^2.4
     escape-string-regexp "^1.0.5"
     supports-color "^5.3.0"
 
+chalk@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/chalk/-/chalk-3.0.0.tgz#3f73c2bf526591f574cc492c51e2456349f844e4"
+  integrity sha512-4D3B6Wf41KOYRFdszmDqMCGq5VV/uMAB273JILmO+3jAlh8X4qDtdtgCR3fxtbLEMzSx22QdhnDcJvu2u1fVwg==
+  dependencies:
+    ansi-styles "^4.1.0"
+    supports-color "^7.1.0"
+
 chardet@^0.7.0:
   version "0.7.0"
   resolved "https://registry.yarnpkg.com/chardet/-/chardet-0.7.0.tgz#90094849f0937f2eedc2425d0d28a9e5f0cbad9e"
@@ -3072,11 +3202,28 @@ color-convert@^1.9.0:
   dependencies:
     color-name "1.1.3"
 
+color-convert@^2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/color-convert/-/color-convert-2.0.1.tgz#72d3a68d598c9bdb3af2ad1e84f21d896abd4de3"
+  integrity sha512-RRECPsj7iu/xb5oKYcsFHSppFNnsj/52OVTRKb4zP5onXwVF3zVmmToNcOfGC+CRDpfK/U584fMg38ZHCaElKQ==
+  dependencies:
+    color-name "~1.1.4"
+
 color-name@1.1.3:
   version "1.1.3"
   resolved "https://registry.yarnpkg.com/color-name/-/color-name-1.1.3.tgz#a7d0558bd89c42f795dd42328f740831ca53bc25"
   integrity sha1-p9BVi9icQveV3UIyj3QIMcpTvCU=
 
+color-name@~1.1.4:
+  version "1.1.4"
+  resolved "https://registry.yarnpkg.com/color-name/-/color-name-1.1.4.tgz#c2a09a87acbde69543de6f63fa3995c826c536a2"
+  integrity sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA==
+
+colors@^1.1.2:
+  version "1.4.0"
+  resolved "https://registry.yarnpkg.com/colors/-/colors-1.4.0.tgz#c50491479d4c1bdaed2c9ced32cf7c7dc2360f78"
+  integrity sha512-a+UqTh4kgZg/SlGvfbzDHpgRu7AAQOmmqRHJnxhRZICKFUT91brVhNNt58CMWU9PsBbv3PDCZUHbVxuDiH2mtA==
+
 columnify@^1.5.4:
   version "1.5.4"
   resolved "https://registry.yarnpkg.com/columnify/-/columnify-1.5.4.tgz#4737ddf1c7b69a8a7c340570782e947eec8e78bb"
@@ -4152,7 +4299,7 @@ esprima@^3.1.3:
   resolved "https://registry.yarnpkg.com/esprima/-/esprima-3.1.3.tgz#fdca51cee6133895e3c88d535ce49dbff62a4633"
   integrity sha1-/cpRzuYTOJXjyI1TXOSdv/YqRjM=
 
-esprima@^4.0.0:
+esprima@^4.0.0, esprima@~4.0.0:
   version "4.0.1"
   resolved "https://registry.yarnpkg.com/esprima/-/esprima-4.0.1.tgz#13b04cdb3e6c5d19df91ab6987a8695619b0aa71"
   integrity sha512-eGuFFw7Upda+g4p+QHvnW0RyTX/SVeJBDM/gCtMARO0cLuT2HcEKnTPvhjV6aGeqrCB/sbNop0Kszm0jsaWU4A==
@@ -4222,6 +4369,22 @@ execa@^1.0.0:
     signal-exit "^3.0.0"
     strip-eof "^1.0.0"
 
+execa@^3.3.0:
+  version "3.3.0"
+  resolved "https://registry.yarnpkg.com/execa/-/execa-3.3.0.tgz#7e348eef129a1937f21ecbbd53390942653522c1"
+  integrity sha512-j5Vit5WZR/cbHlqU97+qcnw9WHRCIL4V1SVe75VcHcD1JRBdt8fv0zw89b7CQHQdUHTt2VjuhcF5ibAgVOxqpg==
+  dependencies:
+    cross-spawn "^7.0.0"
+    get-stream "^5.0.0"
+    human-signals "^1.1.1"
+    is-stream "^2.0.0"
+    merge-stream "^2.0.0"
+    npm-run-path "^4.0.0"
+    onetime "^5.1.0"
+    p-finally "^2.0.0"
+    signal-exit "^3.0.2"
+    strip-final-newline "^2.0.0"
+
 exit@^0.1.2:
   version "0.1.2"
   resolved "https://registry.yarnpkg.com/exit/-/exit-0.1.2.tgz#0632638f8d877cc82107d30a0fff1a17cba1cd0c"
@@ -4425,6 +4588,11 @@ flatted@^2.0.0:
   resolved "https://registry.yarnpkg.com/flatted/-/flatted-2.0.1.tgz#69e57caa8f0eacbc281d2e2cb458d46fdb449e08"
   integrity sha512-a1hQMktqW9Nmqr5aktAux3JMNqaucxGcjtjWnZLHX7yyPCmlSV3M54nGYbqT8K+0GhF3NBgmJCc3ma+WOgX8Jg==
 
+flow-parser@0.*:
+  version "0.112.0"
+  resolved "https://registry.yarnpkg.com/flow-parser/-/flow-parser-0.112.0.tgz#938d7949068f147a196ebc2bd982ea066b024df5"
+  integrity sha512-sxjnwhR76B/fUN6n/XerYzn8R1HvtVo3SM8Il3WiZ4nkAlb2BBzKe1TSVKGSyZgD6FW9Bsxom/57ktkqrqmXGA==
+
 flush-write-stream@^1.0.0:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/flush-write-stream/-/flush-write-stream-1.1.1.tgz#8dd7d873a1babc207d94ead0c2e0e44276ebf2e8"
@@ -4595,6 +4763,13 @@ get-stream@^4.0.0, get-stream@^4.1.0:
   dependencies:
     pump "^3.0.0"
 
+get-stream@^5.0.0:
+  version "5.1.0"
+  resolved "https://registry.yarnpkg.com/get-stream/-/get-stream-5.1.0.tgz#01203cdc92597f9b909067c3e656cc1f4d3c4dc9"
+  integrity sha512-EXr1FOzrzTfGeL0gQdeFEvOMm2mzMOglyiOXSTpPC+iAjAKftbr3jpCMWynogwYnM+eSj9sHGc6wjIcDvYiygw==
+  dependencies:
+    pump "^3.0.0"
+
 get-value@^2.0.3, get-value@^2.0.6:
   version "2.0.6"
   resolved "https://registry.yarnpkg.com/get-value/-/get-value-2.0.6.tgz#dc15ca1c672387ca76bd37ac0a395ba2042a2c28"
@@ -4817,6 +4992,11 @@ has-flag@^3.0.0:
   resolved "https://registry.yarnpkg.com/has-flag/-/has-flag-3.0.0.tgz#b5d454dc2199ae225699f3467e5a07f3b955bafd"
   integrity sha1-tdRU3CGZriJWmfNGfloH87lVuv0=
 
+has-flag@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/has-flag/-/has-flag-4.0.0.tgz#944771fd9c81c81265c4d6941860da06bb59479b"
+  integrity sha512-EykJT/Q1KjTWctppgIAgfSO0tKVuZUjhgMr17kqTumMl6Afv3EISleU7qZUzoXDFTAHTDC4NOoG/ZxU3EvlMPQ==
+
 has-symbol-support-x@^1.4.1:
   version "1.4.2"
   resolved "https://registry.yarnpkg.com/has-symbol-support-x/-/has-symbol-support-x-1.4.2.tgz#1409f98bc00247da45da67cee0a36f282ff26455"
@@ -4963,6 +5143,11 @@ https-proxy-agent@^2.2.3:
     agent-base "^4.3.0"
     debug "^3.1.0"
 
+human-signals@^1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/human-signals/-/human-signals-1.1.1.tgz#c5b1cd14f50aeae09ab6c59fe63ba3395fe4dfa3"
+  integrity sha512-SEQu7vl8KjNL2eoGBLF3+wAjpsNfA9XMlXAYj/3EdaNfAlxKthD1xjEQfGOUhllCGGJVNY34bRr6lPINhNjyZw==
+
 humanize-ms@^1.2.1:
   version "1.2.1"
   resolved "https://registry.yarnpkg.com/humanize-ms/-/humanize-ms-1.2.1.tgz#c46e3159a293f6b896da29316d8b6fe8bb79bbed"
@@ -5393,6 +5578,11 @@ is-stream@^1.1.0:
   resolved "https://registry.yarnpkg.com/is-stream/-/is-stream-1.1.0.tgz#12d4a3dd4e68e0b79ceb8dbc84173ae80d91ca44"
   integrity sha1-EtSj3U5o4Lec6428hBc66A2RykQ=
 
+is-stream@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/is-stream/-/is-stream-2.0.0.tgz#bde9c32680d6fae04129d6ac9d921ce7815f78e3"
+  integrity sha512-XCoy+WlUr7d1+Z8GgSuXmpuUFC9fOhRXglJMx+dwLKTkL44Cjd4W1Z5P+BQZpr+cR93aGP4S/s7Ftw6Nd/kiEw==
+
 is-symbol@^1.0.2:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/is-symbol/-/is-symbol-1.0.3.tgz#38e1014b9e6329be0de9d24a414fd7441ec61937"
@@ -5904,6 +6094,30 @@ jsbn@~0.1.0:
   resolved "https://registry.yarnpkg.com/jsbn/-/jsbn-0.1.1.tgz#a5e654c2e5a2deb5f201d96cefbca80c0ef2f513"
   integrity sha1-peZUwuWi3rXyAdls77yoDA7y9RM=
 
+jscodeshift@0.6.4:
+  version "0.6.4"
+  resolved "https://registry.yarnpkg.com/jscodeshift/-/jscodeshift-0.6.4.tgz#e19ab86214edac86a75c4557fc88b3937d558a8e"
+  integrity sha512-+NF/tlNbc2WEhXUuc4WEJLsJumF84tnaMUZW2hyJw3jThKKRvsPX4sPJVgO1lPE28z0gNL+gwniLG9d8mYvQCQ==
+  dependencies:
+    "@babel/core" "^7.1.6"
+    "@babel/parser" "^7.1.6"
+    "@babel/plugin-proposal-class-properties" "^7.1.0"
+    "@babel/plugin-proposal-object-rest-spread" "^7.0.0"
+    "@babel/preset-env" "^7.1.6"
+    "@babel/preset-flow" "^7.0.0"
+    "@babel/preset-typescript" "^7.1.0"
+    "@babel/register" "^7.0.0"
+    babel-core "^7.0.0-bridge.0"
+    colors "^1.1.2"
+    flow-parser "0.*"
+    graceful-fs "^4.1.11"
+    micromatch "^3.1.10"
+    neo-async "^2.5.0"
+    node-dir "^0.1.17"
+    recast "^0.16.1"
+    temp "^0.8.1"
+    write-file-atomic "^2.3.0"
+
 jsdom@^11.5.1:
   version "11.12.0"
   resolved "https://registry.yarnpkg.com/jsdom/-/jsdom-11.12.0.tgz#1a80d40ddd378a1de59656e9e6dc5a3ba8657bc8"
@@ -6494,7 +6708,7 @@ minimalistic-crypto-utils@^1.0.0, minimalistic-crypto-utils@^1.0.1:
   resolved "https://registry.yarnpkg.com/minimalistic-crypto-utils/-/minimalistic-crypto-utils-1.0.1.tgz#f6c00c1c0b082246e5c4d99dfb8c7c083b2b582a"
   integrity sha1-9sAMHAsIIkblxNmd+4x8CDsrWCo=
 
-minimatch@^3.0.4:
+minimatch@^3.0.2, minimatch@^3.0.4:
   version "3.0.4"
   resolved "https://registry.yarnpkg.com/minimatch/-/minimatch-3.0.4.tgz#5166e286457f03306064be5497e8dbb0c3d32083"
   integrity sha512-yJHVQEhyqPLUTgt9B83PXu6W3rx4MvvHvSUvToogpwoGDOUQ+yDrR0HRot+yOCdCO7u4hX3pWft6kWBBcqh0UA==
@@ -6691,6 +6905,13 @@ node-abi@^2.7.0:
   dependencies:
     semver "^5.4.1"
 
+node-dir@^0.1.17:
+  version "0.1.17"
+  resolved "https://registry.yarnpkg.com/node-dir/-/node-dir-0.1.17.tgz#5f5665d93351335caabef8f1c554516cf5f1e4e5"
+  integrity sha1-X1Zl2TNRM1yqvvjxxVRRbPXx5OU=
+  dependencies:
+    minimatch "^3.0.2"
+
 node-environment-flags@^1.0.5:
   version "1.0.6"
   resolved "https://registry.yarnpkg.com/node-environment-flags/-/node-environment-flags-1.0.6.tgz#a30ac13621f6f7d674260a54dede048c3982c088"
@@ -6912,6 +7133,13 @@ npm-run-path@^2.0.0:
   dependencies:
     path-key "^2.0.0"
 
+npm-run-path@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/npm-run-path/-/npm-run-path-4.0.0.tgz#d644ec1bd0569187d2a52909971023a0a58e8438"
+  integrity sha512-8eyAOAH+bYXFPSnNnKr3J+yoybe8O87Is5rtAQ8qRczJz1ajcsjg8l2oZqP+Ppx15Ii3S1vUTjQN2h4YO2tWWQ==
+  dependencies:
+    path-key "^3.0.0"
+
 "npmlog@0 || 1 || 2 || 3 || 4", npmlog@^4.0.1, npmlog@^4.0.2, npmlog@^4.1.2:
   version "4.1.2"
   resolved "https://registry.yarnpkg.com/npmlog/-/npmlog-4.1.2.tgz#08a7f2a8bf734604779a9efa4ad5cc717abb954b"
@@ -7117,6 +7345,11 @@ p-finally@^1.0.0:
   resolved "https://registry.yarnpkg.com/p-finally/-/p-finally-1.0.0.tgz#3fbcfb15b899a44123b34b6dcc18b724336a2cae"
   integrity sha1-P7z7FbiZpEEjs0ttzBi3JDNqLK4=
 
+p-finally@^2.0.0:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/p-finally/-/p-finally-2.0.1.tgz#bd6fcaa9c559a096b680806f4d657b3f0f240561"
+  integrity sha512-vpm09aKwq6H9phqRQzecoDpD8TmVyGw70qmWlyq5onxY7tqyTTFVvxMykxQSQKILBSFlbXpypIw2T1Ml7+DDtw==
+
 p-is-promise@^1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/p-is-promise/-/p-is-promise-1.1.0.tgz#9c9456989e9f6588017b0434d56097675c3da05e"
@@ -7321,7 +7554,7 @@ path-key@^2.0.0, path-key@^2.0.1:
   resolved "https://registry.yarnpkg.com/path-key/-/path-key-2.0.1.tgz#411cadb574c5a140d3a4b1910d40d80cc9f40b40"
   integrity sha1-QRyttXTFoUDTpLGRDUDYDMn0C0A=
 
-path-key@^3.1.0:
+path-key@^3.0.0, path-key@^3.1.0:
   version "3.1.1"
   resolved "https://registry.yarnpkg.com/path-key/-/path-key-3.1.1.tgz#581f6ade658cbba65a0d3380de7753295054f375"
   integrity sha512-ojmeN0qd+y0jszEtoY48r0Peq5dwMEkIlCOu6Q5f41lfkswXuKtYrhgoTpLnyIcHm24Uhqx+5Tqm2InSwLhE6Q==
@@ -7489,7 +7722,7 @@ prettycli@^1.4.3:
   dependencies:
     chalk "2.1.0"
 
-private@^0.1.6:
+private@^0.1.6, private@~0.1.5:
   version "0.1.8"
   resolved "https://registry.yarnpkg.com/private/-/private-0.1.8.tgz#2381edb3689f7a53d653190060fcf822d2f368ff"
   integrity sha512-VvivMrbvd2nKkiG38qjULzlc+4Vx4wm/whI9pQD35YrARNnhxeiRktSOhSukRLFNlzg6Br/cJPet5J/u19r/mg==
@@ -7850,6 +8083,16 @@ realpath-native@^1.1.0:
   dependencies:
     util.promisify "^1.0.0"
 
+recast@^0.16.1:
+  version "0.16.2"
+  resolved "https://registry.yarnpkg.com/recast/-/recast-0.16.2.tgz#3796ebad5fe49ed85473b479cd6df554ad725dc2"
+  integrity sha512-O/7qXi51DPjRVdbrpNzoBQH5dnAPQNbfoOFyRiUwreTMJfIHYOEBzwuH+c0+/BTSJ3CQyKs6ILSWXhESH6Op3A==
+  dependencies:
+    ast-types "0.11.7"
+    esprima "~4.0.0"
+    private "~0.1.5"
+    source-map "~0.6.1"
+
 rechoir@^0.6.2:
   version "0.6.2"
   resolved "https://registry.yarnpkg.com/rechoir/-/rechoir-0.6.2.tgz#85204b54dba82d5742e28c96756ef43af50e3384"
@@ -8090,7 +8333,7 @@ rimraf@2, rimraf@^2.5.4, rimraf@^2.6.1, rimraf@^2.6.2, rimraf@^2.6.3:
   dependencies:
     glob "^7.1.3"
 
-rimraf@2.6.3:
+rimraf@2.6.3, rimraf@~2.6.2:
   version "2.6.3"
   resolved "https://registry.yarnpkg.com/rimraf/-/rimraf-2.6.3.tgz#b2d104fe0d8fb27cf9e0a1cda8262dd3833c6cab"
   integrity sha512-mwqeW5XsA2qAejG46gYdENaxXjx9onRNCfn7L0duuP4hCuTIi/QO7PDK07KJfp1d+izWPrzEJDcSqBa0OZQriA==
@@ -8774,6 +9017,11 @@ strip-eof@^1.0.0:
   resolved "https://registry.yarnpkg.com/strip-eof/-/strip-eof-1.0.0.tgz#bb43ff5598a6eb05d89b59fcd129c983313606bf"
   integrity sha1-u0P/VZim6wXYm1n80SnJgzE2Br8=
 
+strip-final-newline@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/strip-final-newline/-/strip-final-newline-2.0.0.tgz#89b852fb2fcbe936f6f4b3187afb0a12c1ab58ad"
+  integrity sha512-BrpvfNAE3dcvq7ll3xVumzjKjZQ5tI1sEUIKr3Uoks0XUl45St3FlatVqef9prk4jRDzhW6WZg+3bk93y6pLjA==
+
 strip-indent@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/strip-indent/-/strip-indent-1.0.1.tgz#0c7962a6adefa7bbd4ac366460a638552ae1a0a2"
@@ -8833,6 +9081,13 @@ supports-color@^6.1.0:
   dependencies:
     has-flag "^3.0.0"
 
+supports-color@^7.1.0:
+  version "7.1.0"
+  resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-7.1.0.tgz#68e32591df73e25ad1c4b49108a2ec507962bfd1"
+  integrity sha512-oRSIpR8pxT1Wr2FquTNnGet79b3BWljqOuoW/h4oBhxJ/HUbX5nX6JSruTkvXDCFMwDPvsaTTbvMLKZWSy0R5g==
+  dependencies:
+    has-flag "^4.0.0"
+
 symbol-tree@^3.2.2:
   version "3.2.4"
   resolved "https://registry.yarnpkg.com/symbol-tree/-/symbol-tree-3.2.4.tgz#430637d248ba77e078883951fb9aa0eed7c63fa2"
@@ -8904,6 +9159,13 @@ temp-write@^3.4.0:
     temp-dir "^1.0.0"
     uuid "^3.0.1"
 
+temp@^0.8.1:
+  version "0.8.4"
+  resolved "https://registry.yarnpkg.com/temp/-/temp-0.8.4.tgz#8c97a33a4770072e0a05f919396c7665a7dd59f2"
+  integrity sha512-s0ZZzd0BzYv5tLSptZooSjK8oj6C+c19p7Vqta9+6NPOf7r+fxq0cJe6/oN4LTC79sy5NY8ucOJNgwsKCSbfqg==
+  dependencies:
+    rimraf "~2.6.2"
+
 terser-webpack-plugin@^1.4.1:
   version "1.4.1"
   resolved "https://registry.yarnpkg.com/terser-webpack-plugin/-/terser-webpack-plugin-1.4.1.tgz#61b18e40eaee5be97e771cdbb10ed1280888c2b4"
@@ -9634,7 +9896,7 @@ yargs@^13.3.0:
     y18n "^4.0.0"
     yargs-parser "^13.1.1"
 
-yargs@^14.2.2:
+yargs@^14.2.0, yargs@^14.2.2:
   version "14.2.2"
   resolved "https://registry.yarnpkg.com/yargs/-/yargs-14.2.2.tgz#2769564379009ff8597cdd38fba09da9b493c4b5"
   integrity sha512-/4ld+4VV5RnrynMhPZJ/ZpOCGSCeghMykZ3BhdFBDa9Wy/RH6uEGNWDJog+aUlq+9OM1CFTgtYRW5Is1Po9NOA==