Allow spawning codex by passing cli subcommand (#127)

Author: SteffenDE

src/CodexCli.ts

@@ -0,0 +1,31 @@
+import type {ChildProcess, SpawnOptions} from "node:child_process";
+import {spawn} from "node:child_process";
+import {createRequire} from "node:module";
+
+export function runCodexCli(codexPath: string | undefined, args: Array<string>): Promise<number> {
+    const child = spawnCodexCli(codexPath, args);
+
+    return new Promise((resolve, reject) => {
+        child.on("error", reject);
+        child.on("exit", (code, signal) => {
+            if (signal) {
+                process.kill(process.pid, signal);
+                return;
+            }
+            resolve(code ?? 1);
+        });
+    });
+}
+
+function spawnCodexCli(codexPath: string | undefined, args: Array<string>): ChildProcess {
+    const options: SpawnOptions = {
+        env: process.env,
+        stdio: "inherit",
+    };
+
+    if (codexPath) {
+        return spawn(codexPath, args, {...options, shell: process.platform === "win32"});
+    }
+    const bundledCodexPath = createRequire(import.meta.url).resolve("@openai/codex/bin/codex.js");
+    return spawn(process.execPath, [bundledCodexPath, ...args], options);
+}

src/index.ts

@@ -10,6 +10,7 @@ import {CodexAppServerClient} from "./CodexAppServerClient";
 import packageJson from "../package.json";
 import {logger} from "./Logger";
 import {runLoginCommand} from "./login";
+import {runCodexCli} from "./CodexCli";
 
 if (process.argv.includes("--version")) {
     console.log(`${packageJson.name} ${packageJson.version}`);
@@ -24,6 +25,14 @@ if (process.argv[2] === "login") {
             console.error("Login error:", error.message);
             process.exit(1);
         });
+} else if (process.argv[2] === "cli") {
+    const args = process.argv.slice(3);
+    runCodexCli(process.env["CODEX_PATH"], args)
+        .then((exitCode) => process.exit(exitCode))
+        .catch((error) => {
+            console.error("Codex CLI error:", error.message);
+            process.exit(1);
+        });
 } else {
     startAcpServer();
 }