version.js to check if running the latest version

version.js

@@ -0,0 +1,49 @@
+// check if running the latest version
+
+import {log} from 'console';
+import { existsSync, readFileSync } from 'fs';
+import { exec } from 'child_process';
+
+const execp = (cmd) => new Promise((resolve, reject) => {
+  exec(cmd, (error, stdout, stderr) => {
+    if (stderr) console.error(`stderr: ${stderr}`);
+    // if (stdout) console.log(`stdout: ${stdout}`);
+    if (error) {
+      console.log(`error: ${error.message}`);
+      if (error.message.includes('command not found')) {
+        console.info('Install git to check for updates!');
+      }
+      return reject();
+    }
+    resolve(stdout.trim());
+  });
+});
+
+const git_main = () => readFileSync('.git/refs/heads/main').toString().trim();
+
+let sha, date;
+if (existsSync('/.dockerenv')) {
+  log('Running inside Docker.');
+  ['COMMIT', 'BRANCH', 'NOW'].forEach(v => log(`  ${v}:`, process.env[v]));
+  sha = process.env.COMMIT;
+  date = process.env.NOW;
+} else {
+  log('Not running inside Docker.');
+  sha = await execp('git rev-parse HEAD');
+  date = await execp('git show -s --format=%cD'); // same as format as `date -R` (RFC2822)
+  // date = await execp('git show -s --format=%ch'); // %ch is same as --date=human (short/relative)
+}
+
+const gh = await (await fetch('https://api.github.com/repos/vogler/free-games-claimer/commits/main', {
+    // headers: { accept: 'application/vnd.github.VERSION.sha' }
+  })).json();
+// log(gh);
+
+log('Local commit:', sha, new Date(date));
+log('Online commit:', gh.sha, new Date(gh.commit.committer.date));
+
+if (sha == gh.sha) {
+  log('Running the latest version!')
+} else {
+  log('Not running the latest version!')
+}