Add rollup

rollup.config.js

@@ -0,0 +1,77 @@
+import resolve from '@rollup/plugin-node-resolve'
+import commonjs from '@rollup/plugin-commonjs'
+import postcss from 'rollup-plugin-postcss'
+import license from 'rollup-plugin-license'
+
+const pkg = require('./package.json')
+
+const bannerContent = `
+  Gibki
+
+  @author ${pkg.author}
+  @version ${pkg.version}
+  @url ${pkg.homepage}
+
+  ${pkg.license} license`
+
+let rollupBuilds
+
+/**
+ * Build CSS
+ *
+ */
+if (process.env.BUILD) {
+  rollupBuilds = [{
+    input: './scss/gibki.scss',
+    output: [
+      {
+        file: './css/gibki.css'
+      }
+    ],
+    plugins: [
+      resolve({
+        browser: true
+      }),
+      commonjs(),
+      postcss({
+        extract: true
+      }),
+      license({
+        banner: {
+          content: bannerContent
+        }
+      })
+    ],
+    watch: {
+      clearScreen: false
+    }
+  },
+  {
+    input: './scss/gibki.scss',
+    output: [
+      {
+        file: './css/gibki.min.css'
+      }
+    ],
+    plugins: [
+      resolve({
+        browser: true
+      }),
+      commonjs(),
+      postcss({
+        extract: true,
+        minimize: true
+      }),
+      license({
+        banner: {
+          content: bannerContent
+        }
+      })
+    ],
+    watch: {
+      clearScreen: false
+    }
+  }]
+}
+
+export default rollupBuilds