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fix(hub): give the coder's sandbox a bun shim to the hub's Bun #216

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Merged
TheGreatAxios merged 2 commits into from
Nov 6, 2026
Merged

fix(hub): give the coder's sandbox a bun shim to the hub's Bun #216

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306d952
fix(hub): give the coder's sandbox a bun shim to the hub's Bun
TheGreatAxios Nov 6, 2026
b216e49
refactor(hub): name the sandbox shim folder for all its shims
TheGreatAxios Nov 6, 2026
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15 changes: 8 additions & 7 deletions apps/hub/src/builds/posix-sandbox.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -425,13 +425,14 @@ export async function createPosixBuildExecutor(
throw new BuildExecutionError("owned_build_workspace_required");
const executable = await realpath(process.execPath);
// Standard `#!/usr/bin/env node` launchers must resolve inside the sandbox,
// which has no Node; a hub-owned shim on PATH runs them with Bun instead.
shimDirectory = await realpath(
await mkdtemp(join(tmpdir(), "sb-node-shim-")),
);
const nodeShim = join(shimDirectory, "node");
await writeFile(nodeShim, `#!/bin/sh\nexec ${quote(executable)} "$@"\n`);
await chmod(nodeShim, 0o755);
// which has no Node, and the hub's Bun need not be named `bun` (npm installs
// it as bun.exe); hub-owned shims on PATH run both with the hub's Bun.
shimDirectory = await realpath(await mkdtemp(join(tmpdir(), "sb-shim-")));
for (const name of ["node", "bun"]) {
const shim = join(shimDirectory, name);
await writeFile(shim, `#!/bin/sh\nexec ${quote(executable)} "$@"\n`);
await chmod(shim, 0o755);
}
// Resolve workspace packages before isolation: Bun's runtime lookup scans repository paths
// the sandbox must keep hidden. The bundled runner needs no host package discovery.
const toolChild = join(shimDirectory, "posix-child.js");
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