This repo was created with following trials and errors according to official instructions.

Running a project

One window:

yarn ios

# or

yarn android

Second window:

yarn re:watch

Main source of instructions:

• React-navive-cli
• Reason ML platfrorm

My take

For Mac - install (!!!) XCode 11 and OpenJDK8 For Android - ??

Using Node v10.10.0

Installing tools

yarn global add react-native-cli bs-platform --ignore-engines

Create project

This should work, but for me it did not:

react-native init RNRTemplate --template reason-react-native-template

So I needed to create Reason project manually.

1. create repo

react-native init RNRTemplate
cd RNRTemplate
yarn add bs-platform --dev && yarn add reason-react reason-react-native

2. Add following lines to .gitignore:

# Reason

*.bs.js
.bsb.lock
.merlin
lib/bs

3. Then I add scripts to package.json for working with ReasonML compilation:

"scripts": {
		"re:build": "bsb -clean-world -make-world",
    "re:watch": "bsb -clean-world -make-world -w",
		...
}

4. Lastly you need create a file bsconfig.json to configure bucklescript.

{
  "name": "demo-react-native-app",
  "refmt": 3,
  "reason": {
    "react-jsx": 3
  },
  "package-specs": {
    "module": "es6",
    "in-source": true
  },
  "suffix": ".bs.js",
  "sources": [
    {
      "dir": "src",
      "subdirs": true
    }
  ],
  "bs-dependencies": ["reason-react", "reason-react-native"]
}

Result

Result is this repo.

Vim setup

1. Install reasonml-language-server and add the binary to the $PATH

2. .vimrc plugins:

# linting, formatting
Plugin 'w0rp/ale'

# autocompletion, does linting
Plugin 'neoclide/coc.nvim'

# syntax highliting
Plugin 'reasonml-editor/vim-reason-plus'

3. .vimrc config:

let g:ale\_linters = {
\   'reason': ['reason-language-server'],
\}

let g:ale\_fixers = {
\   'reason': ['refmt'],
\}

let g:ale\_reason\_ls\_executable = '~/your-path-to/reason-language-server'

4. configuration of CoC

• :CocConfig
• Add following:

{
	"languageserver": {
    "reason": {
      "command": "reason-language-server",
      "filetypes": ["reason"]
    }
  },
	// following is nice to have:
	"coc.preferences.previewAutoClose": false,
	"suggest.echodocSupport": true,
	"signature.target": "float",
	"suggest.detailField": "preview",
	"suggest.enablePreview": true
}