Add script and workflow to sync the set of starter-workflows for GHES

script/exec.ts

@@ -0,0 +1,42 @@
+import { spawn } from "child_process";
+
+export class ExecResult {
+  stdout = "";
+  exitCode = 0;
+}
+
+/**
+ * Executes a process
+ */
+export async function exec(
+  command: string,
+  args: string[] = [],
+  allowAllExitCodes: boolean = false
+): Promise<ExecResult> {
+  process.stdout.write(`EXEC: ${command} ${args.join(" ")}\n`);
+  return new Promise((resolve, reject) => {
+    const execResult = new ExecResult();
+    const cp = spawn(command, args, {});
+
+    // STDOUT
+    cp.stdout.on("data", (data) => {
+      process.stdout.write(data);
+      execResult.stdout += data.toString();
+    });
+
+    // STDERR
+    cp.stderr.on("data", (data) => {
+      process.stderr.write(data);
+    });
+
+    // Close
+    cp.on("close", (code) => {
+      execResult.exitCode = code;
+      if (code === 0 || allowAllExitCodes) {
+        resolve(execResult);
+      } else {
+        reject(new Error(`Command exited with code ${code}`));
+      }
+    });
+  });
+}