fix(gitService): handle case with no tags

- Improved error handling for `getLatestTag`
- Added unit tests for `getLatestTag`
- Return error if no tags are found
- Added `ignoreReturnCode` option
- Updated test cases for new error handling

Author: taj54

src/services/gitService.ts

@@ -79,8 +79,14 @@ export class GitService {
           latestTag += data.toString();
         },
       },
+      ignoreReturnCode: true,
     };
-    await this._execGitCommand(['describe', '--tags', '--abbrev=0'], options);
+    const exitCode = await this._execGitCommand(['describe', '--tags', '--abbrev=0'], options);
+
+    if (exitCode !== 0) {
+      throw new Error('No tags found in the repository. Please create a tag first.');
+    }
+
     return latestTag.trim();
   }
 

tests/services/gitService.test.ts

@@ -0,0 +1,30 @@
+import { GitService } from '../../src/services/gitService';
+import * as exec from '@actions/exec';
+import { vi } from 'vitest';
+
+describe('GitService', () => {
+  let gitService: GitService;
+
+  beforeEach(() => {
+    gitService = new GitService();
+  });
+
+  describe('getLatestTag', () => {
+    it('should throw an error if no tags are found', async () => {
+      vi.spyOn(exec, 'exec').mockResolvedValue(1); // Simulate git command failure
+      await expect(gitService.getLatestTag()).rejects.toThrow('No tags found in the repository. Please create a tag first.');
+    });
+
+    it('should return the latest tag if tags are found', async () => {
+      const execSpy = vi.spyOn(exec, 'exec').mockImplementation(async (command, args, options) => {
+        if (options && options.listeners && options.listeners.stdout) {
+          options.listeners.stdout(Buffer.from('v1.0.0'));
+        }
+        return 0;
+      });
+      const latestTag = await gitService.getLatestTag();
+      expect(latestTag).toBe('v1.0.0');
+      execSpy.mockRestore();
+    });
+  });
+});