fix bash tool not showing stderr

packages/opencode/src/tool/bash.ts

@@ -1,5 +1,5 @@
 import { z } from "zod"
-import { spawn } from "child_process"
+import { exec } from "child_process"
 import { text } from "stream/consumers"
 import { Tool } from "./tool"
 import DESCRIPTION from "./bash.txt"
@@ -12,7 +12,7 @@ import { Log } from "../util/log"
 import { Wildcard } from "../util/wildcard"
 import { $ } from "bun"
 
-// const MAX_OUTPUT_LENGTH = 30000
+const MAX_OUTPUT_LENGTH = 30000
 const DEFAULT_TIMEOUT = 1 * 60 * 1000
 const MAX_TIMEOUT = 10 * 60 * 1000
 
@@ -118,19 +118,25 @@ export const BashTool = Tool.define("bash", {
       })
     }
 
-    const process = spawn("bash", ["-c", params.command], {
+    const process = exec(params.command, {
-      stdio: "pipe",
       cwd: app.path.cwd,
       signal: ctx.abort,
+      maxBuffer: MAX_OUTPUT_LENGTH,
       timeout,
     })
+
+    const stdoutPromise = text(process.stdout!)
+    const stderrPromise = text(process.stderr!)
+
     await new Promise<void>((resolve) => {
       process.on("close", () => {
         resolve()
       })
     })
-    const stdout = await text(process.stdout)
+
-    const stderr = await text(process.stderr)
+    const stdout = await stdoutPromise
+    const stderr = await stderrPromise
+    console.log({ stderr, stdout })
 
     return {
       title: params.command,