feat: add version export (#840)

* feat: add version export

Author: montezume

.size-snapshot.json

@@ -1,15 +1,15 @@
 {
   "dist/ui-kit.esm.js": {
-    "bundled": 866786,
-    "minified": 596078,
-    "gzipped": 121176,
+    "bundled": 866961,
+    "minified": 596248,
+    "gzipped": 121235,
     "treeshaked": {
       "rollup": {
-        "code": 429612,
+        "code": 429763,
         "import_statements": 919
       },
       "webpack": {
-        "code": 453939
+        "code": 454131
       }
     }
   }

rollup.config.js

@@ -18,6 +18,9 @@ const configureRollupPlugins = (options = {}) =>
   [
     replace({
       'process.env.NODE_ENV': JSON.stringify('production'),
+      'process.env.npm_package_version': JSON.stringify(
+        process.env.npm_package_version
+      ),
     }),
     // To use the nodejs `resolve` algorithm
     resolve(),

src/index.bundlespec.js

@@ -1,4 +1,4 @@
-import { i18n, customProperties } from 'ui-kit';
+import { i18n, customProperties, version } from 'ui-kit';
 
 describe('exports', () => {
   it('should export i18n for five languages', () => {
@@ -9,6 +9,12 @@ describe('exports', () => {
     expect(customProperties).toBeTruthy();
   });
 
+  describe('version', () => {
+    it('should match package.json version', () => {
+      expect(version).toMatch(process.env.npm_package_version);
+    });
+  });
+
   it('should have the translations', () => {
     // This test ensures some translations exist, assuming the others would
     // work as well then

src/index.js

@@ -138,6 +138,8 @@ export { default as customProperties } from '../materials/custom-properties';
 
 export { i18n };
 
+export { default as version } from './version';
+
 export {
   default as ContentNotification,
 } from './components/notifications/content-notification';

src/version.js

@@ -0,0 +1,3 @@
+const version = process.env.npm_package_version;
+
+export default version;