feat: allow for more ways to store cli configuration

README.md

@@ -38,20 +38,31 @@ Nollup provides a dev server which can be used as a CLI command.
 
 See "Nollup Options" for list of available flags.
 
-## .nolluprc
+## Configuration 
 
-Configuration file that can be used to pass configuration instead of as flags through the CLI. 
 
-```
+You can use a configuration file as alternative to CLI flags or to complement them.
+
+Configuration files are read using [cosmiconfig](https://github.com/davidtheclark/cosmiconfig).
+
+This means configuration will be looked for in the following places in the order listed:
+
+1. A `nollup` property in a `package.json` file.
+2. A `.nolluprc` file with `JSON` or `YAML` syntax.
+3. A `.nolluprc.json` file.
+4. A `.nolluprc.yaml`, `.nolluprc.yml`, or `.nolluprc.js` file.
+5. A `nollup.config.js` JS file exporting the object.
+
+`.nolluprc`
+```json
 {
     "hot": true,
     "contentBase": "./public"
 }
 ```
 
-A JavaScript file called ```.nolluprc.js``` can be used instead.
-
-```
+`.nolluprc.js`
+```javascript
 module.exports = {
     hot: true,
     contentBase: './public'

lib/cli.js

@@ -13,6 +13,7 @@ let path = require('path');
 let express = require('express');
 let fallback = require('express-history-api-fallback');
 let proxy = require('express-http-proxy');
+let cosmiconfig = require('cosmiconfig');
 let nollupDevServer = require('./dev-middleware');
 let ConfigLoader = require('./impl/ConfigLoader');
 let app = express();
@@ -90,10 +91,10 @@ for (let i = 0; i < process.argv.length; i++) {
 }
 
 (async function () {
-    if (fs.existsSync('.nolluprc')) {
-        options = Object.assign({}, options, JSON.parse(fs.readFileSync('.nolluprc')));
-    } else if (fs.existsSync('.nolluprc.js')) {
-        options = Object.assign({}, options, require(path.resolve(process.cwd(), './.nolluprc.js')));
+    const cosmiconfigResult = cosmiconfig.cosmiconfigSync('nollup').search()
+
+    if (cosmiconfigResult && cosmiconfigResult.config) {
+        options = Object.assign({}, options, cosmiconfigResult.config); 
     }
 
     if (options.before) {

package.json

@@ -15,6 +15,7 @@
     "acorn": "^7.0.0",
     "chokidar": "^2.0.2",
     "convert-source-map": "^1.5.1",
+    "cosmiconfig": "^6.0.0",
     "express": "^4.16.3",
     "express-history-api-fallback": "^2.2.1",
     "express-http-proxy": "^1.5.1",