Initial open-source release

packages/context/src/core/git.service.reset-hard.test.ts

@@ -0,0 +1,56 @@
+import { afterEach, beforeEach, describe, expect, it } from 'vitest';
+import { mkdtemp, readFile, rm, writeFile } from 'node:fs/promises';
+import { tmpdir } from 'node:os';
+import { join } from 'node:path';
+import type { SimpleGit } from 'simple-git';
+import type { KloCoreConfig } from './config.js';
+import { createSimpleGit } from './git-env.js';
+import { GitService } from './git.service.js';
+
+describe('GitService.resetHardTo', () => {
+  let workdir: string;
+  let git: SimpleGit;
+  let gitService: GitService;
+
+  beforeEach(async () => {
+    workdir = await mkdtemp(join(tmpdir(), 'gitsvc-reset-'));
+    git = createSimpleGit(workdir);
+    await git.init();
+    await git.addConfig('user.email', 't@test');
+    await git.addConfig('user.name', 'Test');
+    await writeFile(join(workdir, 'init'), 'init');
+    await git.add('.');
+    await git.commit('init');
+    const coreConfig: KloCoreConfig = {
+      storage: { configDir: workdir, homeDir: workdir },
+      git: { userName: 'Test', userEmail: 't@test' },
+    };
+    gitService = new GitService(coreConfig);
+    (gitService as any).git = git;
+    (gitService as any).configDir = workdir;
+  });
+
+  afterEach(async () => rm(workdir, { recursive: true, force: true }));
+
+  it('rewinds HEAD to the target SHA, removing later commits and their files', async () => {
+    const baseSha = (await git.revparse(['HEAD'])).trim();
+    await writeFile(join(workdir, 'a'), 'a1');
+    await git.add('.');
+    await git.commit('a');
+    await writeFile(join(workdir, 'b'), 'b1');
+    await git.add('.');
+    await git.commit('b');
+
+    await gitService.resetHardTo(baseSha);
+
+    expect((await git.revparse(['HEAD'])).trim()).toBe(baseSha);
+    expect(await readFile(join(workdir, 'a'), 'utf-8').catch(() => null)).toBeNull();
+    expect(await readFile(join(workdir, 'b'), 'utf-8').catch(() => null)).toBeNull();
+  });
+
+  it('is a no-op when target SHA equals current HEAD', async () => {
+    const sha = (await git.revparse(['HEAD'])).trim();
+    await gitService.resetHardTo(sha);
+    expect((await git.revparse(['HEAD'])).trim()).toBe(sha);
+  });
+});