Fix headless OpenCode permission prompts

Co-Authored-By: Paperclip <noreply@paperclip.ing>

packages/adapters/opencode-local/src/server/runtime-config.test.ts

@@ -0,0 +1,79 @@
+import fs from "node:fs/promises";
+import os from "node:os";
+import path from "node:path";
+import { afterEach, describe, expect, it } from "vitest";
+import { prepareOpenCodeRuntimeConfig } from "./runtime-config.js";
+
+const cleanupPaths = new Set<string>();
+
+afterEach(async () => {
+  await Promise.all(
+    [...cleanupPaths].map(async (filepath) => {
+      await fs.rm(filepath, { recursive: true, force: true });
+      cleanupPaths.delete(filepath);
+    }),
+  );
+});
+
+async function makeConfigHome(initialConfig?: Record<string, unknown>) {
+  const root = await fs.mkdtemp(path.join(os.tmpdir(), "paperclip-opencode-test-"));
+  cleanupPaths.add(root);
+  const configDir = path.join(root, "opencode");
+  await fs.mkdir(configDir, { recursive: true });
+  if (initialConfig) {
+    await fs.writeFile(
+      path.join(configDir, "opencode.json"),
+      `${JSON.stringify(initialConfig, null, 2)}\n`,
+      "utf8",
+    );
+  }
+  return root;
+}
+
+describe("prepareOpenCodeRuntimeConfig", () => {
+  it("injects an external_directory allow rule by default", async () => {
+    const configHome = await makeConfigHome({
+      permission: {
+        read: "allow",
+      },
+      theme: "system",
+    });
+
+    const prepared = await prepareOpenCodeRuntimeConfig({
+      env: { XDG_CONFIG_HOME: configHome },
+      config: {},
+    });
+    cleanupPaths.add(prepared.env.XDG_CONFIG_HOME);
+
+    expect(prepared.env.XDG_CONFIG_HOME).not.toBe(configHome);
+    const runtimeConfig = JSON.parse(
+      await fs.readFile(
+        path.join(prepared.env.XDG_CONFIG_HOME, "opencode", "opencode.json"),
+        "utf8",
+      ),
+    ) as Record<string, unknown>;
+    expect(runtimeConfig).toMatchObject({
+      theme: "system",
+      permission: {
+        read: "allow",
+        external_directory: "allow",
+      },
+    });
+
+    await prepared.cleanup();
+    cleanupPaths.delete(prepared.env.XDG_CONFIG_HOME);
+    await expect(fs.access(prepared.env.XDG_CONFIG_HOME)).rejects.toThrow();
+  });
+
+  it("respects explicit opt-out", async () => {
+    const configHome = await makeConfigHome();
+    const prepared = await prepareOpenCodeRuntimeConfig({
+      env: { XDG_CONFIG_HOME: configHome },
+      config: { dangerouslySkipPermissions: false },
+    });
+
+    expect(prepared.env).toEqual({ XDG_CONFIG_HOME: configHome });
+    expect(prepared.notes).toEqual([]);
+    await prepared.cleanup();
+  });
+});