React Native Utils

I found myself writing the same things over and over again, as we always do. I looked for a generator or some project scaffolding tools that would do what I wanted and as usual didn't find them. I probably could have put this in slush but I just wanted to get something done rather than learning yet another tool, even if it is simple.

rnutils is a command line utility to help create the basic patterns that I use when working on react native projects and initialize them with the create-react-native-app utility. I typically use the following tools and libraries:

• TypeScript
• StoryBook
• Jest
• Mobx

This is intended for use with vscode, but most features should be editor independent. Setting up debugging will not work with any other editor.

Since I use typescript extensively, I have not included any options for generating files in JavaScript. If I get enough interest I'll add some options for use with JS as well. PR's are welcome.

Installation

yarn global add rnutils

New Project

To get started on a new typescript project:

1. Run create-react-native-app [projectName] as you normally would.
2. Navigate to your new project directory and run rnutils.
3. Choose Post CRNA Config to setup a basic typescript/react native project. See the options below for more detail.

or

1. Run 'react-native init [projectName]` as you normally would.
2. Navigate to your new project directory and run rnutils.
3. Choose Post react-native Typescript Config to setup a basic typescript/react native project. See the options below for more detail.

Usage

From your project directory:

rnutils 

Options

When running the rnutils you will have the following choices:

• Create Component
• Create Stateless Component
• Create Screen
• Post CRNA Typescript Config
• Post react-native Typescript Config
• Exit

Create Component

This command will create a component at the /components/ComponentName directory along with four files:

• Component.ts
• IComponentProps.ts
• IComponentState.ts
• index.ts

The files will contain basic boilerplate and the index.ts will take care of exporting each file. You can include subdirectories in the component name. The first letter of the component name will be capatilazed

Create Stateless Component

This command will create a stateless component at the /components/ComponentName directory along with three files:

• Component.ts
• IComponentProps.ts
• index.ts

The files will contain basic boilerplate and the index.ts will take care of exporting each file.

Create Screen

This command will create a component at the /screens/ScreenName directory along with four files:

• Screen.ts
• IScreenProps.ts
• IScreenState.ts
• index.ts

The files will contain basic boilerplate and the index.ts will take care of exporting each file.

Post CRNA TypeScript Config

This option performs a series of tasks that are meant to be completed right after you run the create-react-native-app. They are:

• Install the following dev dependencies:

  • typescript
  • jest-expo-ts
  • react-test-renderer
  • react-native-typescript-transformer
  • @types/react
  • @types/react-native
  • @typesreact-test-renderer
  • @types/jest

• Install the following dependencies:

  • mobx
  • mobx-react

• Update app.json for typescript.

  • The app.json file needs to be aware of the react-native-typescript-transformer. It will be modified accordingly.

• Create tsconfig.json.

• Delete jsconfig.json.

• Create .vscode/settings.json.

  • Creates the file. It will overwrite anything already there.
  • This is necesary for vscode to debug.

• Create additonal scripts in the package.json file:

  • cleanWatchman: Deletes all inotify watches
  • startEmulator: Starts the Android emulator. This may be different on other machines.
  • preandroid: Runs before android to clean inotify watches and starts the emulator.
  • increaseWatches: Increases the number of inotify watches. This is reset on reboot. I should probably make this permanent on my machine instead of having the script here.

• Creates my Standard Directory Structure:

  .
  ├──__tests__
  |  ├──components
  |  ├──config
  |  ├──navigation
  |  ├──screens
  |  ├──stores
  |  └──util
  └──src
      ├──components
      ├──config
      ├──navigation
      ├──screens
      ├──stores
      └──util

• Runs getstorybook. Tests to see if a user has @storybook/cli installed. See the storybook quick start guide for more info.

Post react-native Typescript Config

This option performs a series of tasks that are meant to be completed right after you run the react-native init. They are:

• Install the following dev dependencies:

  • typescript,
  • ts-jest,
  • react-native-typescript-transformer,
  • babel-preset-es2015,
  • @types/react,
  • @types/react-native,
  • @types/react-test-renderer,
  • @types/jest,
  • @storybook/react-native

• Install the following dependencies:

  • mobx
  • mobx-react

• Create rn-cli.config.json to configure the react-native-typescript-transformer

• Create tsconfig.json.

• Delete jsconfig.json.

• Creates .vscode/launch.json to enable debugging.

• Create additonal scripts in the package.json file:

  • android: Packages and installs on your connected android device or emulator.
  • ios: Packages and installs on your connected ios device or emulator.
  • cleanWatchman: Deletes all inotify watches
  • startEmulator: Starts the Android emulator. This may be different on other machines.
  • increaseWatches: Increases the number of inotify watches. This is reset on reboot. I should probably make this permanent on my machine instead of having the script here.

• Creates my Standard Directory Structure:

  .
  ├──__tests__
  |  ├──components
  |  ├──config
  |  ├──navigation
  |  ├──screens
  |  ├──stores
  |  └──util
  └──src
      ├──components
      ├──config
      ├──navigation
      ├──screens
      ├──stores
      └──util

• Runs getstorybook. Tests to see if a user has @storybook/cli installed. See the storybook quick start guide for more info.

NOTE I am only testing on linux/ubuntu. Most of these options should work on windows as I'm using shelljs and fs for any file access. I'm happy to accept a PR to fix any windows bugs you may have found.