# purs-loader
> [PureScript](http://www.purescript.org) loader for [webpack](http://webpack.github.io)
- Supports hot-reloading and rebuilding of single source files
- Dead code elimination using the `bundle` option
- Colorized build output using `purescript-psa` and the `psc: "psa"` option
## Install
Install with [npm](https://npmjs.org/package/purs-loader).
```
// For PureScript 0.9 and newer
npm install purs-loader --save-dev
// For PureScript 0.8
npm install purs-loader@purescript-0.8 --save-dev
```
## Example
```javascript
const webpackConfig = {
// ...
loaders: [
// ...
{
test: /\.purs$/,
loader: 'purs-loader',
exclude: /node_modules/,
query: {
psc: 'psa',
src: ['bower_components/purescript-*/src/**/*.purs', 'src/**/*.purs']
}
}
// ...
]
// ...
}
```
Refer to the [purescript-webpack-example](https://github.com/ethul/purescript-webpack-example) for a more detailed example.
### Options
Default options:
```javascript
const loaderConfig = {
psc: 'psc',
pscArgs: {},
pscBundle: 'psc-bundle',
pscBundleArgs: {},
pscIde: false, // instant rebuilds using psc-ide-server (experimental)
pscIdeArgs: {}, // for example, to use different psc-ide-server port: {port: 4088}
pscIdeServerArgs: {}, // for example, to change the port { port: 4088 }
pscIdeColors: false, // defaults to true if psc === 'psa'
pscPackage: false,
bundleOutput: 'output/bundle.js',
bundleNamespace: 'PS',
bundle: false,
warnings: true,
watch: false, // indicates if webapck is in watch mode
output: 'output',
src: [
path.join('src', '**', '*.purs'),
// if pscPackage = false
path.join('bower_components', 'purescript-*', 'src', '**', '*.purs')
// if pscPackage = true
// source paths reported by `psc-package sources`
]
}
```
### `psc-ide` support (experimental)
Experimental support for instant rebuilds using `psc-ide-server` can be enabled
via the `pscIde: true` option.
You can use an already running `psc-ide-server` instance by specifying the port in `pscIdeArgs`,
if there is no server running this loader will start one for you.
#### Slower webpack startup after using purs-loader ?
By default, the psc-ide-server will be passed the globs from query.src, this is
helpful for other tools using psc-ide-server (for example IDE plugins), however
it might result in a slower initial webpack startup time (rebuilds are not
affected). To override the default behaviour, add:
`pscIdeServerArgs: { "_": ['your/*globs/here'] }` to the loader config
### `psc-package` support (experimental)
Set `pscPackage` query parameter to `true` to enable `psc-package` support. The `psc-package`-supplied source paths
will be appended to `src` parameter.
