feat(B-0581): decompose slice 1 (gh auth refresh wrapper basics)

tools/auth/gh-auth-refresh-wrapper.ts

@@ -0,0 +1,71 @@
+#!/usr/bin/env bun
+import { spawn } from "bun";
+
+async function main() {
+  const args = process.argv.slice(2);
+  if (args.length === 0) {
+    console.error("Usage: bun run tools/auth/gh-auth-refresh-wrapper.ts <scope-list>");
+    process.exit(1);
+  }
+
+  const scopes = args[0];
+  if (!scopes) {
+    console.error("Scope list cannot be empty.");
+    process.exit(1);
+  }
+  console.log(`[gh-auth-refresh-wrapper] Starting gh auth refresh for scopes: ${scopes}`);
+
+  const proc = spawn(["gh", "auth", "refresh", "-h", "github.com", "-s", scopes], {
+    stdin: "pipe",
+    stdout: "pipe",
+    stderr: "inherit",
+  });
+
+  if (!proc.stdout || !proc.stdin) {
+    console.error("Failed to get piped stdin/stdout for gh process.");
+    process.exit(1);
+  }
+
+  const reader = proc.stdout.getReader();
+  const decoder = new TextDecoder();
+  let codeFound = false;
+  let buffer = "";
+
+  async function processStream() {
+    while (true) {
+      const { done, value } = await reader.read();
+      if (done) break;
+      const text = decoder.decode(value);
+      process.stdout.write(text);
+      buffer += text;
+
+      // Look for the Yes/No prompt
+      if (buffer.includes("Authenticate Git with your GitHub credentials?")) {
+        console.log("\n[gh-auth-refresh-wrapper] Auto-answering 'Y' to auth prompt...");
+        if(proc.stdin) {
+          proc.stdin.write("Y\n");
+          proc.stdin.flush();
+        }
+      }
+
+      // Look for the one-time code
+      const codeMatch = buffer.match(/one-time code:\s*([A-Z0-9\-]+)/i);
+      if (codeMatch && !codeFound) {
+        codeFound = true;
+        const code = codeMatch[1];
+        console.log("\n=========================================");
+        console.log(`[gh-auth-refresh-wrapper] ONE-TIME CODE CAPTURED: ${code}`);
+        console.log("=========================================\n");
+        // Slice 2 will add pbcopy and osascript UI. Slice 3 will add auto-Enter pumping.
+      }
+    }
+  }
+
+  await processStream();
+
+  const exitCode = await proc.exited;
+  console.log(`[gh-auth-refresh-wrapper] gh process exited with code ${exitCode}`);
+  process.exit(exitCode);
+}
+
+main();