119 lines
3 KiB
Markdown
119 lines
3 KiB
Markdown
# Lilconfig ⚙️
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[](https://badge.fury.io/js/lilconfig)
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[](https://packagephobia.now.sh/result?p=lilconfig)
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[](https://coveralls.io/github/antonk52/lilconfig)
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A zero-dependency alternative to [cosmiconfig](https://www.npmjs.com/package/cosmiconfig) with the same API.
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## Installation
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```sh
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npm install lilconfig
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```
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## Usage
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```js
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import {lilconfig, lilconfigSync} from 'lilconfig';
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// all keys are optional
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const options = {
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stopDir: '/Users/you/some/dir',
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searchPlaces: ['package.json', 'myapp.conf.js'],
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ignoreEmptySearchPlaces: false
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}
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lilconfig(
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'myapp',
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options // optional
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).search() // Promise<LilconfigResult>
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lilconfigSync(
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'myapp',
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options // optional
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).load(pathToConfig) // LilconfigResult
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/**
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* LilconfigResult
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* {
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* config: any; // your config
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* filepath: string;
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* }
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*/
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```
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## Difference to `cosmiconfig`
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Lilconfig does not intend to be 100% compatible with `cosmiconfig` but tries to mimic it where possible. The key differences are:
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- **no** support for yaml files out of the box(`lilconfig` attempts to parse files with no extension as JSON instead of YAML). You can still add the support for YAML files by providing a loader, see an [example](#yaml-loader) below.
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- **no** cache
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### Options difference between the two.
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|cosmiconfig option | lilconfig |
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|------------------------|-----------|
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|cache | ❌ |
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|loaders | ✅ |
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|ignoreEmptySearchPlaces | ✅ |
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|packageProp | ✅ |
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|searchPlaces | ✅ |
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|stopDir | ✅ |
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|transform | ✅ |
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## Loaders examples
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### Yaml loader
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If you need the YAML support you can provide your own loader
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```js
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import {lilconfig} from 'lilconfig';
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import yaml from 'yaml';
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function loadYaml(filepath, content) {
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return yaml.parse(content);
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}
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const options = {
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loaders: {
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'.yaml': loadYaml,
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'.yml': loadYaml,
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// loader for files with no extension
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noExt: loadYaml
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}
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};
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lilconfig('myapp', options)
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.search()
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.then(result => {
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result // {config, filepath}
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});
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```
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### ESM loader
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Lilconfig v2 does not support ESM modules out of the box. However, you can support it with a custom a loader. Note that this will only work with the async `lilconfig` function and won't work with the sync `lilconfigSync`.
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```js
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import {lilconfig} from 'lilconfig';
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const loadEsm = filepath => import(filepath);
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lilconfig('myapp', {
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loaders: {
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'.js': loadEsm,
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'.mjs': loadEsm,
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}
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})
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.search()
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.then(result => {
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result // {config, filepath}
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result.config.default // if config uses `export default`
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});
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```
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## Version correlation
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- lilconig v1 → cosmiconfig v6
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- lilconig v2 → cosmiconfig v7
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