Attach CI runner to edge E2E network

scripts/edge-gateway-e2e.mjs

@@ -118,6 +118,73 @@ async function readDefaultGatewayHost() {
   }
 }
 
+function composeNetworkName(composeProject) {
+  return `${composeProject}_default`;
+}
+
+async function readCurrentContainerRef() {
+  if (process.platform === "win32") {
+    return null;
+  }
+
+  const candidates = [];
+  const envHostname = String(process.env.HOSTNAME || "").trim();
+  if (envHostname !== "") {
+    candidates.push(envHostname);
+  }
+
+  try {
+    const hostname = (await fs.readFile("/etc/hostname", "utf8")).trim();
+    if (hostname !== "") {
+      candidates.push(hostname);
+    }
+  } catch {
+    // Not running in a container with /etc/hostname available.
+  }
+
+  try {
+    const cgroup = await fs.readFile("/proc/self/cgroup", "utf8");
+    const matches = cgroup.match(/[0-9a-f]{64}/gi) || [];
+    candidates.push(...matches);
+  } catch {
+    // cgroup metadata is optional in local development.
+  }
+
+  return candidates.find((candidate) => /^[a-zA-Z0-9][a-zA-Z0-9_.-]{1,127}$/.test(candidate)) || null;
+}
+
+async function connectCurrentContainerToComposeNetwork(rootDir, composeProject) {
+  const containerRef = await readCurrentContainerRef();
+  if (!containerRef) {
+    return false;
+  }
+
+  const inspection = await runCommand("docker", ["inspect", containerRef], {
+    cwd: rootDir,
+    allowFailure: true,
+  });
+  if (inspection.code !== 0) {
+    return false;
+  }
+
+  const networkName = composeNetworkName(composeProject);
+  const connection = await runCommand("docker", ["network", "connect", networkName, containerRef], {
+    cwd: rootDir,
+    allowFailure: true,
+  });
+  const stderr = String(connection.stderr || "");
+  if (connection.code === 0) {
+    process.stdout.write(`Attached runner container ${containerRef} to ${networkName}.\n`);
+    return true;
+  }
+
+  if (/already exists|already connected/i.test(stderr)) {
+    return true;
+  }
+
+  return false;
+}
+
 async function readComposeServiceHost(rootDir, composeProject, serviceName) {
   const ps = await runCommand("docker", composeArgs(composeProject, ["ps", "-q", serviceName]), {
     cwd: rootDir,
@@ -156,6 +223,9 @@ async function candidateApiBaseUrls(baseUrl, rootDir, composeProject) {
 
   if (["localhost", "127.0.0.1", "::1"].includes(url.hostname)) {
     if (rootDir && composeProject) {
+      await connectCurrentContainerToComposeNetwork(rootDir, composeProject);
+      candidates.push(baseUrlWithHost(normalized, "traefik", ""));
+
       const traefikHost = await readComposeServiceHost(rootDir, composeProject, "traefik");
       if (traefikHost) {
         candidates.push(baseUrlWithHost(normalized, traefikHost, ""));