Add initial files

version/getVersion.mjs

@@ -0,0 +1,24 @@
+import {readFileSync} from 'node:fs';
+import {resolve} from 'node:path';
+
+/**
+ * Cache app version. Just to prevent multiple reading from fs
+ * @type {null|string}
+ */
+let CACHED_VERSION = null;
+
+/**
+ * Entry function for get app version.
+ * By default, it returns `version` from `package.json`, but you can implement any logic here.
+ * Runs several times for each vite configs and electron-builder config.
+ * @param {string} [root=process.cwd()] Project root path. Needed for current implementation. Indicate where to find `package.json`
+ * @return {string}
+ */
+export function getVersion(root = process.cwd()) {
+  if (CACHED_VERSION === null) {
+    CACHED_VERSION = JSON.parse(
+      readFileSync(resolve(root, 'package.json'), {encoding: 'utf8'}),
+    ).version;
+  }
+  return CACHED_VERSION;
+}

version/inject-app-version-plugin.mjs

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+import {getVersion} from './getVersion.mjs';
+
+/**
+ * Somehow inject app version to vite build context
+ * @param {string} [root]
+ * @return {import('vite').Plugin}
+ */
+export const injectAppVersion = root => ({
+  name: 'inject-version',
+  config: () => {
+    // TODO: Find better way to inject app version
+    process.env.VITE_APP_VERSION = getVersion(root);
+  },
+});