fix(build-node): preserve Bun linker for node-pty install (#20364)

Author: Hona

packages/opencode/script/build-node.ts

@@ -8,6 +8,15 @@ import { fileURLToPath } from "url"
 const __filename = fileURLToPath(import.meta.url)
 const __dirname = path.dirname(__filename)
 const dir = path.resolve(__dirname, "..")
+const root = path.resolve(dir, "../..")
+
+function linker(): "hoisted" | "isolated" {
+  // jsonc-parser is only declared in packages/opencode, so its install location
+  // tells us whether Bun used a hoisted or isolated workspace layout.
+  if (fs.existsSync(path.join(dir, "node_modules", "jsonc-parser"))) return "isolated"
+  if (fs.existsSync(path.join(root, "node_modules", "jsonc-parser"))) return "hoisted"
+  throw new Error("Could not detect Bun linker from jsonc-parser")
+}
 
 process.chdir(dir)
 
@@ -41,7 +50,9 @@ const migrations = await Promise.all(
 )
 console.log(`Loaded ${migrations.length} migrations`)
 
-await $`bun install --os="*" --cpu="*" @lydell/node-pty@1.2.0-beta.10`
+const link = linker()
+
+await $`bun install --linker=${link} --os="*" --cpu="*" @lydell/node-pty@1.2.0-beta.10`
 
 await Bun.build({
   target: "node",