it's fine

gen-service-version.js

@@ -0,0 +1,24 @@
+const child_process = require('child_process');
+
+const services = ['bar-service', 'foo-service'];
+
+function latestCommitInDirectory(dirname) {
+    return String(child_process.execSync(`git log --pretty=format:%H -n 1 -- ${dirname}`));
+}
+
+const serviceVersions = {};
+
+const currentCommit = latestCommitInDirectory('.');
+
+for (const service of services) {
+    serviceVersions[service] = latestCommitInDirectory(service);
+}
+
+console.log(currentCommit);
+console.log(serviceVersions);
+
+Object.entries(serviceVersions).forEach(([name, version]) => {
+    const skip = version === currentCommit ? 'run' : 'skip';
+
+    console.log(`::set-output name=${name}::${skip}`)
+});