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https://github.com/azu/rc-config-loader
Load config from .{product}rc.{json,yml,js} file
https://github.com/azu/rc-config-loader
config javascript load package rc
Last synced: 6 days ago
JSON representation
Load config from .{product}rc.{json,yml,js} file
- Host: GitHub
- URL: https://github.com/azu/rc-config-loader
- Owner: azu
- License: mit
- Created: 2017-02-12T08:34:22.000Z (almost 8 years ago)
- Default Branch: master
- Last Pushed: 2023-06-13T22:40:50.000Z (over 1 year ago)
- Last Synced: 2025-01-13T04:06:30.303Z (13 days ago)
- Topics: config, javascript, load, package, rc
- Language: TypeScript
- Homepage:
- Size: 241 KB
- Stars: 61
- Watchers: 3
- Forks: 6
- Open Issues: 2
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
- my-awesome-list - rc-config-loader
README
# rc-config-loader [](https://github.com/azu/rc-config-loader/actions?query=workflow%3A"test")
Load config from `.{product}rc.{json,yml,js}` file.
It is a Node.js library for loading `.textlintrc`, `.eslintrc`, `.stylelintrc` etc...
## Features
Find and load a configuration object from:
- a `package.json` property if it is needed
- a JSON or YAML, JS "rc file"
- `.rc` or `.rc.json` or `.rc.js` or`.rc.yml`, `.rc.yaml`
- TypeScript support
- Includes `.d.ts`
## Difference
### with [MoOx/rc-loader](https://github.com/MoOx/rc-loader "MoOx/rc-loader")
- Safe API
- `rc` contains shabang in `.js` file
- Enhance Error message
### with [cosmiconfig](https://github.com/davidtheclark/cosmiconfig "cosmiconfig")
- Sync loading
- [cosmiconfig@3+](https://github.com/davidtheclark/cosmiconfig/blob/master/CHANGELOG.md#300) support `sync` option
- Built-in TypeScript support
- [comisconfig@6*](https://github.com/davidtheclark/cosmiconfig/blob/master/CHANGELOG.md#600) is written by TypeScript
If you want to async support and customize loader, recommended to use [cosmiconfig](https://github.com/davidtheclark/cosmiconfig).
## Install
Install with [npm](https://www.npmjs.com/):
npm install rc-config-loader
## Usage
### API
```ts
export interface rcConfigLoaderOption {
// does look for `package.json`
packageJSON?:
| boolean
| {
fieldName: string;
};
// if config file name is not same with packageName, set the name
configFileName?: string;
// treat default(no ext file) as some extension
defaultExtension?: string | string[];
// where start to load
cwd?: string;
}
/**
* Find and load rcfile, return { config, filePath }
* If not found any rcfile, throw an Error.
* @param {string} pkgName
* @param {rcConfigLoaderOption} [opts]
* @returns {{ config: Object, filePath:string } | undefined}
*/
export declare function rcFile(pkgName: string, opts?: rcConfigLoaderOption): {
config: R;
filePath: string;
} | undefined;
```
`rcFile` return `{ config, filePath }` object.
- `config`: it is config object
- `filePath`: absolute path to config file
**Note:**
- `rcFile` function return `undefined` if the config file is not found
- `rcFile` throw an Error if the config file content is malformed (causing a parsing error)
Recommenced usage:
```js
import { rcFile } from "rc-config-loader"
function loadRcFile(rcFileName){
try {
const results = rcFile(rcFileName);
// Not Found
if (!results) {
return {};
}
return results.config;
} catch (error) {
// Found it, but it is parsing error
return {} ; // default value
}
}
// load config
const config = loadRcFile("your-application");
console.log(config); // => rcfile content
```
It will check these files and return config file if found it.
- `.your-applicationrc.json`
- `.your-applicationrc.yml`
- `.your-applicationrc.yaml`
- `.your-applicationrc.js`
- [optional] `package.json`
- if `packageJSON` option is enabled
### Example
```js
import { rcFile } from "rc-config-loader"
// load .eslintrc from current dir
console.log(rcFile("eslint"));
// load .eslintrc from specific path
console.log(rcFile("eslint", {
configFileName: `${__dirname}/test/fixtures/.eslintrc`
}));
/*
config: { extends: 'standard',
rules:
{ 'comma-dangle': [ 2, 'always-multiline' ],
'arrow-parens': [ 2, 'as-needed' ] } }
filePath: ${__dirname}/test/fixtures/.eslintrc
*/
// load property from package.json
console.log(rcFile("rc-config-loader", {
packageJSON: {
fieldName: "directories"
}
}));
/*
config: { test: 'test' }
filePath: /path/to/package.json
*/
// load .eslintrc from specific dir
console.log(rcFile("eslint", {
cwd: `${__dirname}/test/fixtures`
}));
// load specific filename from current dir
console.log(rcFile("travis", {configFileName: ".travis"}));
/*
config: { sudo: false, language: 'node_js', node_js: 'stable' }
filePath: /path/to/.travis
*/
// try to load as .json, .yml, js
console.log(rcFile("bar", {
configFileName: `${__dirname}/test/fixtures/.barrc`,
defaultExtension: [".json", ".yml", ".js"]
}));
// try to load as foobar, but .foobarrc is not found
console.log(rcFile("foorbar")); // => undefined
// try to load as .json, but it is not json
// throw SyntaxError
try {
rcFile("unknown", {
// This is not json
configFileName: `${__dirname}/test/fixtures/.unknownrc`,
defaultExtension: ".json"
})
} catch (error) {
console.log(error);
/*
SyntaxError: Cannot read config file: /test/fixtures/.unknownrc
*/
}
```
## Users
- [textlint](https://github.com/textlint/textlint "textlint")
## Changelog
See [Releases page](https://github.com/azu/rc-config-loader/releases).
## Running tests
Install devDependencies and Run `npm test`:
npm i -d && npm test
## Contributing
Pull requests and stars are always welcome.
For bugs and feature requests, [please create an issue](https://github.com/azu/rc-config-loader/issues).
1. Fork it!
2. Create your feature branch: `git checkout -b my-new-feature`
3. Commit your changes: `git commit -am 'Add some feature'`
4. Push to the branch: `git push origin my-new-feature`
5. Submit a pull request :D
## Author
- [github/azu](https://github.com/azu)
- [twitter/azu_re](https://twitter.com/azu_re)
## License
MIT © azu
## Acknowledgement
- [zkochan/rcfile: Loads library configuration in all possible ways](https://github.com/zkochan/rcfile "zkochan/rcfile: Loads library configuration in all possible ways")
**Difference**
- support multiple `defaultExtension`