refactor(agents): centralize sandbox media and fs policy helpers

src/agents/test-helpers/unsafe-mounted-sandbox.ts

@@ -0,0 +1,82 @@
+import fs from "node:fs/promises";
+import os from "node:os";
+import path from "node:path";
+import type { SandboxContext } from "../sandbox.js";
+import type { SandboxFsBridge, SandboxResolvedPath } from "../sandbox/fs-bridge.js";
+import { createSandboxFsBridgeFromResolver } from "./host-sandbox-fs-bridge.js";
+import { createPiToolsSandboxContext } from "./pi-tools-sandbox-context.js";
+
+export function createUnsafeMountedBridge(params: {
+  root: string;
+  agentHostRoot: string;
+  workspaceContainerRoot?: string;
+}): SandboxFsBridge {
+  const root = path.resolve(params.root);
+  const agentHostRoot = path.resolve(params.agentHostRoot);
+  const workspaceContainerRoot = params.workspaceContainerRoot ?? "/workspace";
+
+  const resolvePath = (filePath: string, cwd?: string): SandboxResolvedPath => {
+    // Intentionally unsafe: simulate a sandbox FS bridge that maps /agent/* into a host path
+    // outside the workspace root (e.g. an operator-configured bind mount).
+    const hostPath =
+      filePath === "/agent" || filePath === "/agent/" || filePath.startsWith("/agent/")
+        ? path.join(
+            agentHostRoot,
+            filePath === "/agent" || filePath === "/agent/" ? "" : filePath.slice("/agent/".length),
+          )
+        : path.isAbsolute(filePath)
+          ? filePath
+          : path.resolve(cwd ?? root, filePath);
+
+    const relFromRoot = path.relative(root, hostPath);
+    const relativePath =
+      relFromRoot && !relFromRoot.startsWith("..") && !path.isAbsolute(relFromRoot)
+        ? relFromRoot.split(path.sep).filter(Boolean).join(path.posix.sep)
+        : filePath.replace(/\\/g, "/");
+
+    const containerPath = filePath.startsWith("/")
+      ? filePath.replace(/\\/g, "/")
+      : relativePath
+        ? path.posix.join(workspaceContainerRoot, relativePath)
+        : workspaceContainerRoot;
+
+    return { hostPath, relativePath, containerPath };
+  };
+
+  return createSandboxFsBridgeFromResolver(resolvePath);
+}
+
+export function createUnsafeMountedSandbox(params: {
+  sandboxRoot: string;
+  agentRoot: string;
+  workspaceContainerRoot?: string;
+}): SandboxContext {
+  const bridge = createUnsafeMountedBridge({
+    root: params.sandboxRoot,
+    agentHostRoot: params.agentRoot,
+    workspaceContainerRoot: params.workspaceContainerRoot,
+  });
+  return createPiToolsSandboxContext({
+    workspaceDir: params.sandboxRoot,
+    agentWorkspaceDir: params.agentRoot,
+    workspaceAccess: "rw",
+    fsBridge: bridge,
+    tools: { allow: [], deny: [] },
+  });
+}
+
+export async function withUnsafeMountedSandboxHarness(
+  run: (ctx: { sandboxRoot: string; agentRoot: string; sandbox: SandboxContext }) => Promise<void>,
+) {
+  const stateDir = await fs.mkdtemp(path.join(os.tmpdir(), "openclaw-sbx-mounts-"));
+  const sandboxRoot = path.join(stateDir, "sandbox");
+  const agentRoot = path.join(stateDir, "agent");
+  await fs.mkdir(sandboxRoot, { recursive: true });
+  await fs.mkdir(agentRoot, { recursive: true });
+  const sandbox = createUnsafeMountedSandbox({ sandboxRoot, agentRoot });
+  try {
+    await run({ sandboxRoot, agentRoot, sandbox });
+  } finally {
+    await fs.rm(stateDir, { recursive: true, force: true });
+  }
+}