re-natal/README.md

# Re-Natal
### Bootstrap ClojureScript-based React Native apps with Reagent and re-frame
Artur Girenko, MIT License
[@drapanjanas](https://twitter.com/drapanjanas)

---

This project is a fork of [dmotz/natal](https://github.com/dmotz/natal) by Dan Motzenbecker with
the goal of generating skeleton of native app for iOS and Android based on
[Reagent](https://github.com/reagent-project/reagent) and [re-frame](https://github.com/Day8/re-frame).

The support of figwheel is based on solution developed by [decker405/figwheel-react-native](https://github.com/decker405/figwheel-react-native)

Re-Natal is a simple command-line utility that automates most of the process of
setting up a React Native app running on ClojureScript with Reagent an re-frame.

Generated project works in iOS and Android devices.

## State
- Same codebase for iOS and Android
- Figwheel used for REPL and live coding
- For Android figwheel does not work yet, but auto-compile and reload works fast
- Figwheel is only working in "Debug in Chrome" mode
- You can reload app any time, no problem.
- Optimizations :simple is used to compile "production" index.ios.js and index.android.js
- [Unified way of using static images of rn 0.14](https://facebook.github.io/react-native/docs/images.html) work ONLY with prod-build...

## Usage

Before getting started, make sure you have the
[required dependencies](#dependencies) installed.

Then, install the CLI using npm:

```
$ npm install -g re-natal
```

To bootstrap a new app, run `re-natal init` with your app's name as an argument:

```
$ re-natal init FutureApp
```

If your app's name is more than a single word, be sure to type it in CamelCase.
A corresponding hyphenated Clojure namespace will be created.

Re-Natal will create a simple skeleton based on the current
version of [Reagent](https://github.com/reagent-project/reagent) and [Day8/re-frame](https://github.com/Day8/re-frame).
If all goes well you should see printed out basic instructions how to run in iOS simulator.

```
$ cd future-app
```
To run in iOS:
```
$ cd re-natal xcode
```
and then run your app from Xcode normally.

To run in Android, run your simulator first or connect device and:
```
$ react-native run-android
```

Initially the ClojureScript is compiled in "prod" profile, meaning `index.*.js` files
are compiled with `optimizations :simple`.
Development in such mode is not fun because of slow compilation and long reload time.

Luckily, this can be improved by compiling with `optimizations :none` and using
figwheel (unfortunately not working in Android yet)

To start development in `optimizations :none` mode you have to start "Debug in Chrome"
in your React Native application.

Then execute commands:
```
$ re-natal use-figwheel
$ lein figwheel ios
or
$ re-natal use-reload
$ lein cljsbuild auto android
```
This will generate index.ios.js and index.android.js to make `optimizations :none` possible.

You have to reload your app,
and if you have used figwheel the REPL should come up with prompt.

At the REPL prompt, try loading your app's namespace:

```clojure
(in-ns 'future-app.ios.core)
```

Changes you make via the REPL or by changing your `.cljs` files should appear live
in the simulator.

Try this command as an example:

```clojure
(dispatch [:set-greeting "Hello Native World!"])
```

## "Prod" build
Do this with command:
```
$ lein prod-build
```
It will clean and rebuild index.ios.js and index.android.js with `optimizations :simple`
After this you can reload the app exit "Debug in Chrome".

## Tips
- Having `rlwrap` installed is optional but highly recommended since it makes
the REPL a much nicer experience with arrow keys.

- Running multiple React Native apps at once can cause problems with the React
Packager so try to avoid doing so.

- You can launch your app on the simulator without opening Xcode by running
`re-natal launch` in your app's root directory.

- By default new Natal projects will launch on the iPhone 6 simulator. To change
which device `re-natal launch` uses, you can run `re-natal listdevices` to see a list
of available simulators, then select one by running `re-natal setdevice` with the
index of the device on the list.

- To change advanced settings run `re-natal xcode` to quickly open the Xcode project.

- The Xcode-free workflow is for convenience. If you're encountering app crashes,
you should open the Xcode project and run it from there to view errors.


## Dependencies
As Re-Natal is the orchestration of many individual tools, there are quite a few dependencies.
If you've previously done React Native or Clojure development, you should hopefully
have most installed already. Platform dependencies are listed under their respective
tools.

- [npm](https://www.npmjs.com) `>=1.4`
    - [Node.js](https://nodejs.org) `>=4.0.0`
- [Leiningen](http://leiningen.org) `>=2.5.3`
    - [Java 8](http://www.oracle.com/technetwork/java/javase/downloads/index.html)
- [Xcode](https://developer.apple.com/xcode) (+ Command Line Tools) `>=6.3`
    - [OS X](http://www.apple.com/osx) `>=10.10`
- [Watchman](https://facebook.github.io/watchman) `>=3.7.0`


## Aspirations
- [x] Xcode-free workflow with CLI tools
- [x] Templates for other ClojureScript React wrappers
- [ ] Automatic wrapping of all React Native component functions for ClojureScript
- [ ] Automatically run React packager in background
- [ ] Automatically tail cljs build log and report compile errors
- [ ] Working dev tools
- [ ] Automatic bundling for offline device usage and App Store distribution
- [x] Android support


Contributions are welcome.

For more ClojureScript React Native resources visit [cljsrn.org](http://cljsrn.org).