feat(backend): initial setup for cms backend service

backend/src/services/git.service.ts

@@ -0,0 +1,65 @@
+import simpleGit, { SimpleGit } from 'simple-git';
+import { mkdir, rm } from 'fs/promises';
+import path from 'path';
+import { env } from '../config/env.js';
+
+export class GitService {
+  private git: SimpleGit;
+  private workspaceDir: string;
+  private repoUrl: string;
+  private token: string;
+
+  constructor() {
+    this.workspaceDir = env.GIT_WORKSPACE_DIR;
+    this.repoUrl = env.GIT_REPO_URL;
+    this.token = env.GIT_TOKEN;
+    this.git = simpleGit();
+  }
+
+  async initialize() {
+    // Ensure workspace directory exists
+    await mkdir(this.workspaceDir, { recursive: true });
+
+    // Add token to repo URL for authentication
+    const authenticatedUrl = this.repoUrl.replace(
+      'https://',
+      `https://oauth2:${this.token}@`
+    );
+
+    try {
+      // Check if repo already exists
+      await this.git.cwd(this.workspaceDir);
+      await this.git.status();
+      console.log('Repository already exists, pulling latest...');
+      await this.git.pull();
+    } catch {
+      // Clone if doesn't exist
+      console.log('Cloning repository...');
+      await rm(this.workspaceDir, { recursive: true, force: true });
+      await this.git.clone(authenticatedUrl, this.workspaceDir);
+      await this.git.cwd(this.workspaceDir);
+    }
+
+    // Configure git user
+    await this.git.addConfig('user.name', env.GIT_USER_NAME);
+    await this.git.addConfig('user.email', env.GIT_USER_EMAIL);
+  }
+
+  async commitAndPush(message: string): Promise<string> {
+    await this.git.add('.');
+    await this.git.commit(message);
+    await this.git.push('origin', 'main');
+
+    const log = await this.git.log({ maxCount: 1 });
+    return log.latest?.hash || '';
+  }
+
+  getWorkspacePath(relativePath: string): string {
+    return path.join(this.workspaceDir, relativePath);
+  }
+
+  async reset() {
+    await this.git.reset(['--hard', 'HEAD']);
+    await this.git.clean('f', ['-d']);
+  }
+}