ci: create ci-bun.yml

[lumirlumir]

Prerequisites checklist

• I have read the contributing guidelines.

What is the purpose of this pull request?

In this PR, I've created ci-bun.yml.

This is part of the effort to centralize workflows mentioned in eslint/workflows#4.

The full workflow can be found here: https://github.com/eslint/workflows/blob/main/.github/workflows/ci-bun.yml

What changes did you make? (Give an overview)

In this PR, I've centralized ci-bun.yml.

Related Issues

Refs: eslint/workflows#15, eslint/workflows#4

Is there anything you'd like reviewers to focus on?

N/A

[lumirlumir]

I've just wrapped the test cases with an if-else clause, so Windows tests run only on Windows, and Unix tests run on non-Windows environments.

This is because Bun CI fails on Windows, particularly for the Unix tests.

I suspect it's due to the Unix tests relying on a Unix-specific PATH, but they're being run on Windows.

---

FYI, the previous CI doesn't include Windows environment tests; adding regular tests that target Windows will cause failures.

---

https://github.com/eslint/eslint-release/actions/runs/18707118578/job/53347191545

[lumirlumir]

Added Windows and macOS tests for more robust testing.

[aladdin-add]

not sure it should support bun - the package is only used by eslint team, and I don't think we will use it in a non-Node.js environment.

[lumirlumir]

@aladdin-add If so, would only adding Windows and macOS tests to the existing ci.yml make sense here?

Looking at the test code, the release tool appears to be intended for use across multiple platforms:

eslint-release/tests/lib/shell-ops.test.js

Lines 28 to 49 in cbc16bb

	describe("getModifiedEnv()", () => {
	it("should modify path correctly when on Windows", () => {
	const env = ShellOps.getModifiedEnv("win32");
	assert.strictEqual(env.PATH, `${NODE_MODULES_PATH};${PATH}`);
	});
	[
	"darwin",
	"freebsd",
	"linux",
	"sunos"
	].forEach(platform => {
	it(`(with ${platform}) should modify path correctly when on Unix OS`, () => {
	const env = ShellOps.getModifiedEnv(platform);
	assert.strictEqual(env.PATH, `${NODE_MODULES_PATH}:${PATH}`);
	});
	});
	});

(Also, there seem to be a few repositories that rely on this package?)

https://github.com/eslint/eslint-release/network/dependents

[nzakas]

There's no need to test this on bun as it's just a tool for the team's use.