RNW

This package offers an all-in-one solution to work with react-native toghether with yarn workspaces.

As symlinks don't work with react-native, rnw wraps wml and configures it in an easy way for you to use.

Example app

Here's a working example of this package.

UNIVERSE

Prerequisite (skip if your workspaces are already setup)

Let's assume that you have a project structure similar to this. But of course yours can be different. The only thing that matters is just to have separate packages handled by yarn workspaces.

- myproject/
-- package.json (defines workspaces and could use lerna)

-- app-mobile/
--- package.json

-- app-web/
--- package.json

-- packages/
--- core/
---- package.json

myproject/package.json

This will define your yarn workspaces. You can include your apps in the workspaces like so.

"name": "myproject",
"private": true,
"workspaces": {
    "packages": [
        "packages/*",
        "app-*"
    ]
},
"scripts": {
    "bootstrap": "lerna bootstrap"
}

app-mobile/package.json

This is your react-native app. Never hoist react-native-yarn-workspaces.

{
  "name": "app-mobile",
  "private": true,
  "scripts": {
    "postinstall": "rnw link ../packages",
    "watch": "rnw watch",
    "flush": "watchman watch-del-all",
    "start": "expo start"
  },
  "workspaces": {
    "nohoist": [
      "expo",
      "expo/**",
      "react",
      "react/**",
      "react-native",
      "react-native/**",
      "react-native-yarn-workspaces",
      "react-native-yarn-workspaces/**"
    ]
  },
  "dependencies": {
    "@mypackages/core": "1.0.0",
    "expo": "^35.0.0",
    "react": "16.8.3",
    "react-dom": "16.8.3",
    "react-native": "https://github.com/expo/react-native/archive/sdk-35.0.0.tar.gz"
  },
  "devDependencies": {
    "react-native-yarn-workspaces": "1.1.0",
    "babel-preset-expo": "^7.0.0"
  }
}

app-web/package.json

{
  "name": "app-web",
  "dependencies": {
    "@mypackages/core": "1.0.0"
  }
}

packages/core/package.json

These are the modules that app-web and app-mobile share. There's nothing particular to mention here. Just that react, react-dom and react-native are peerDependencies.

How to use

In your mobile app: Add react-native-yarn-workspaces to your mobile app dependencies.

yarn add -D react-native-yarn-workspaces

Your local packages should be specified in dependencies or devDependencies. Never hoist this package.

"name": "app-mobile",
"private": true,
"scripts": {
    "postinstall": "rnw link ../packages",
    "watch": "rnw watch"
},
"workspaces": {
    "nohoist": [
      ...
      "react-native-yarn-workspaces",
      "react-native-yarn-workspaces/**"
    ]
  },
"dependencies": {
    "@mypackages/core": "1.0.0"
}

In your mobile app: Link your local packages manually Or skip and install all your deps with yarn or lerna bootstrap from one level up.

yarn postinstall

In your mobile app: Watch for the changes that happen in packages/core by running this in your mobile app.

yarn watch

Of course, in order to have changes actually happening, you may be "watch building" in your packages as well, for instance with babel src -d dist --watch in packages/core.

If you need to flush one day

watchman watch-del-all

Recommended

This bin creates a .watchmanconfig in each of your local packages, for instance packages/core/.watchmanconfig. I recommend to also ignore src if you're building that package wit babel/webpack/rollup.

// .watchmanconfig
{
  "ignore_dirs": [
    "node_modules",
    "src"
  ]
}