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feat: fell back to pinned bunx package for bun2nix generation

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- Added a fallback to the pinned bunx package when generating Nix bun dependencies without an active Nix environment.
- Updated generator resolution logic and corresponding tests.
This commit is contained in:
can1357
2026-08-13 07:18:17 +02:00
parent a69d166e00
commit ddbf1ffecb
3 changed files with 22 additions and 11 deletions
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README.md
+1 -1
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@@ -620,7 +620,7 @@ Build and smoke-test the distributable Nix package with `nix build .#omp`. Wayla
bun run gen:nix
```
The command uses `bun2nix` from `nix develop` when available, otherwise enters the development shell through Nix. Do not edit `nix/bun.nix` manually.
The command uses `bun2nix` from `nix develop` when available, otherwise enters the development shell through Nix, then falls back to the pinned `bunx bun2nix@2.1.2`. Do not edit `nix/bun.nix` manually.
For a non-interactive smoke check:
scripts/gen-nix-bun.test.ts
+6 -5
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@@ -1,5 +1,5 @@
import { describe, expect, test } from "bun:test";
import { resolveNixBunDepsGenerator } from "./gen-nix-bun";
import { BUN2NIX_NPM_SPEC, resolveNixBunDepsGenerator } from "./gen-nix-bun";
describe("resolveNixBunDepsGenerator", () => {
test("prefers bun2nix from the active development shell", () => {
@@ -17,9 +17,10 @@ describe("resolveNixBunDepsGenerator", () => {
expect(generator).toEqual({ kind: "nix", executable: "/usr/bin/nix" });
});
test("fails before a release mutates files when no generator is available", () => {
expect(() => resolveNixBunDepsGenerator(() => null)).toThrow(
"Generating nix/bun.nix requires bun2nix from `nix develop`, or Nix to enter that shell.",
);
test("falls back to the pinned portable bunx package", () => {
expect(resolveNixBunDepsGenerator(() => null)).toEqual({
kind: "bunx",
package: BUN2NIX_NPM_SPEC,
});
});
});
scripts/gen-nix-bun.ts
+13 -3
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@@ -6,10 +6,16 @@ import { $which } from "../packages/utils/src/which";
const repoRoot = path.join(import.meta.dir, "..");
/** Pinned npm package matching flake.lock's bun2nix revision (`0f2a1f…`). */
export const BUN2NIX_NPM_SPEC = "bun2nix@2.1.2";
type FindExecutable = (command: string) => string | null;
/** The executable path and invocation mode for the pinned Bun dependency generator. */
export type NixBunDepsGenerator = { kind: "bun2nix"; executable: string } | { kind: "nix"; executable: string };
export type NixBunDepsGenerator =
| { kind: "bun2nix"; executable: string }
| { kind: "nix"; executable: string }
| { kind: "bunx"; package: typeof BUN2NIX_NPM_SPEC };
/** Resolve the generator needed by releases before they mutate repository state. */
export function resolveNixBunDepsGenerator(findExecutable: FindExecutable = $which): NixBunDepsGenerator {
@@ -19,7 +25,7 @@ export function resolveNixBunDepsGenerator(findExecutable: FindExecutable = $whi
const nix = findExecutable("nix");
if (nix) return { kind: "nix", executable: nix };
throw new Error("Generating nix/bun.nix requires bun2nix from `nix develop`, or Nix to enter that shell.");
return { kind: "bunx", package: BUN2NIX_NPM_SPEC };
}
/** Regenerate the checked-in Bun dependency expression with the pinned bun2nix input. */
@@ -28,10 +34,14 @@ export async function generateNixBunDeps(generator: NixBunDepsGenerator = resolv
await $`${generator.executable} -l bun.lock -c ../ -o nix/bun.nix`.cwd(repoRoot);
return;
}
if (generator.kind === "nix") {
await $`${generator.executable} --extra-experimental-features ${"nix-command flakes"} --accept-flake-config develop --command bun2nix -l bun.lock -c ../ -o nix/bun.nix`.cwd(
repoRoot,
);
return;
}
await $`bunx ${generator.package} -l bun.lock -c ../ -o nix/bun.nix`.cwd(repoRoot);
}
if (import.meta.main) await generateNixBunDeps();