Initial version

Author: danburzo

dist/index.js

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+'use strict';
+
+function _interopDefault (ex) { return (ex && (typeof ex === 'object') && 'default' in ex) ? ex['default'] : ex; }
+
+var rollupPluginutils = require('rollup-pluginutils');
+require('postcss');
+var fs = _interopDefault(require('fs'));
+
+var index = (opts) => {
+
+	let styles = {};
+	let bundles = {};
+
+	const options = Object.assign({
+		include: ['**/*.css']
+	}, opts);
+
+	const filter = rollupPluginutils.createFilter(options.include, options.exclude);
+
+	return {
+		name: 'cssbundle',
+
+		async load(id) {
+			if (!filter(id)) return;
+			return await fs.readFile(id, 'utf8');
+		},
+
+		transform(code, id) {
+			if (!filter(id)) return;
+			styles[id] = code;
+			return '';
+		},
+
+		ongenerate(opts, bundle) {
+			let css = Object.entries(styles)
+				.sort((a, b) => bundle.modules.indexOf(a[0]) - bundle.modules.indexOf(b[0]))
+				.map(entry => entry[1])
+				.join('\n');
+			bundles[opts.file] = css;
+		},
+
+		onwrite(opts) {
+			let dest = options.file || opts.file.replace(/\.js$/, '.css');
+			fs.writeFile(dest, bundles[opts.file]);
+		}
+	}
+}
+
+module.exports = index;

package.json

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+{
+  "dependencies": {
+    "postcss": "^6.0.21",
+    "rollup-pluginutils": "^2.0.1"
+  },
+  "name": "rollup-plugin-css-bundle",
+  "version": "1.0.0",
+  "main": "dist/index.js",
+  "module": "src/index.js",
+  "repository": "git@github.com:danburzo/rollup-plugin-css-bundle.git",
+  "author": "Dan Burzo <danburzo@gmail.com>",
+  "license": "MIT",
+  "files": [
+    "src",
+    "dist"
+  ],
+  "devDependencies": {
+    "rollup": "^0.58.1"
+  },
+  "scripts": {
+    "build": "rollup -i src/index.js -o dist/index.js -f cjs",
+    "watch": "rollup -w -i src/index.js -o dist/index.js -f cjs"
+  }
+}

src/index.js

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+import { createFilter } from 'rollup-pluginutils';
+import postcss from 'postcss';
+import fs from 'fs';
+
+export default (opts) => {
+
+	let styles = {};
+	let bundles = {};
+
+	const options = Object.assign({
+		include: ['**/*.css']
+	}, opts);
+
+	const filter = createFilter(options.include, options.exclude);
+
+	return {
+		name: 'cssbundle',
+
+		async load(id) {
+			if (!filter(id)) return;
+			return await fs.readFile(id, 'utf8');
+		},
+
+		transform(code, id) {
+			if (!filter(id)) return;
+			styles[id] = code;
+			return '';
+		},
+
+		ongenerate(opts, bundle) {
+			let css = Object.entries(styles)
+				.sort((a, b) => bundle.modules.indexOf(a[0]) - bundle.modules.indexOf(b[0]))
+				.map(entry => entry[1])
+				.join('\n');
+			bundles[opts.file] = css;
+		},
+
+		onwrite(opts) {
+			let dest = options.file || opts.file.replace(/\.js$/, '.css');
+			fs.writeFile(dest, bundles[opts.file]);
+		}
+	}
+}