import { execFileSync } from "node:child_process";
import { mkdtempSync, rmSync, writeFileSync } from "node:fs";
import { tmpdir } from "node:os";
import { join } from "node:path";
import { afterEach, beforeEach, describe, expect, it } from "vitest";
import { captureGitContext, gitContextsEqual } from "../src/utils/git.js";
function git(cwd: string, ...args: string[]): string {
return execFileSync("git", args, { cwd, encoding: "utf8" }).trim();
}
function initRepo(dir: string): void {
git(dir, "init", "-q", "-b", "main");
git(dir, "config", "user.email", "t@t.co");
git(dir, "config", "user.name", "t");
}
function commit(dir: string, message: string): string {
writeFileSync(join(dir, "file.txt"), `${message}\n`);
git(dir, "add", "-A");
git(dir, "commit", "-q", "-m", message);
return git(dir, "rev-parse", "HEAD");
}
describe("captureGitContext", () => {
let dir: string;
beforeEach(() => {
dir = mkdtempSync(join(tmpdir(), "git-context-"));
});
afterEach(() => {
rmSync(dir, { recursive: true, force: true });
});
it("reads branch, commit, and normalized repo url", () => {
initRepo(dir);
git(dir, "remote", "add", "origin", "https://github.com/acme/widgets.git");
const sha = commit(dir, "init");
expect(captureGitContext(dir)).toEqual({
branch: "main",
commit: sha,
repoUrl: "https://github.com/acme/widgets.git",
});
});
it("reports a detached HEAD as a commit with no branch", () => {
initRepo(dir);
const sha = commit(dir, "init");
git(dir, "checkout", "-q", sha);
const ctx = captureGitContext(dir);
expect(ctx?.commit).toBe(sha);
expect(ctx?.branch).toBeUndefined();
});
it("omits repo url when there is no origin remote", () => {
initRepo(dir);
const sha = commit(dir, "init");
const ctx = captureGitContext(dir);
expect(ctx?.repoUrl).toBeUndefined();
expect(ctx?.commit).toBe(sha);
});
it("keeps an ssh remote url verbatim when it cannot be normalized", () => {
initRepo(dir);
git(dir, "remote", "add", "origin", "git@github.com:acme/widgets.git");
commit(dir, "init");
expect(captureGitContext(dir)?.repoUrl).toBe("git@github.com:acme/widgets.git");
});
it("returns null outside a git repo", () => {
expect(captureGitContext(dir)).toBeNull();
});
});
describe("gitContextsEqual", () => {
const SHA = "0123456789abcdef0123456789abcdef01234567";
const SHA2 = "89abcdef0123456789abcdef0123456789abcdef";
it("compares all fields", () => {
expect(gitContextsEqual({ commit: SHA, branch: "main" }, { commit: SHA, branch: "main" })).toBe(true);
expect(gitContextsEqual({ commit: SHA, branch: "main" }, { commit: SHA2, branch: "main" })).toBe(false);
expect(gitContextsEqual({ commit: SHA }, { commit: SHA, branch: "main" })).toBe(false);
});
});