feat(envVariables): add branchName and repoName as general template variables (#129)

Previously, branchName was only available as a service-scoped variable
(e.g. {{{web_frontend_branchName}}}), and repoName was not available at all.
This adds both as top-level additionalVariables so users can reference
{{{branchName}}} and {{{repoName}}} directly in any env var template.

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: vigneshrajsb

src/server/lib/__tests__/envVariables.test.ts

@@ -149,4 +149,33 @@ describe('envVariables - cloud secret pattern preservation', () => {
       expect(result).toBe('DB={{aws:db:pass}} HOST=localhost GCP={{gcp:api:token}} PORT=5432');
     });
   });
+
+  describe('general template variables', () => {
+    it('renders branchName and repoName variables', () => {
+      const template = '{"BRANCH":"{{{branchName}}}","REPO":"{{{repoName}}}"}';
+      const data = { branchName: 'feat/my-feature', repoName: 'myorg/myrepo' };
+
+      const result = preserveAndRestoreSecretPatterns(template, data);
+
+      expect(result).toBe('{"BRANCH":"feat/my-feature","REPO":"myorg/myrepo"}');
+    });
+
+    it('renders branchName and repoName alongside other variables', () => {
+      const template = '{{{branchName}}} {{{repoName}}} {{{buildUUID}}}';
+      const data = { branchName: 'main', repoName: 'org/repo', buildUUID: 'uuid-123' };
+
+      const result = preserveAndRestoreSecretPatterns(template, data);
+
+      expect(result).toBe('main org/repo uuid-123');
+    });
+
+    it('renders empty string when branchName or repoName are undefined', () => {
+      const template = '{{{branchName}}} {{{repoName}}}';
+      const data = {};
+
+      const result = preserveAndRestoreSecretPatterns(template, data);
+
+      expect(result).toBe(' ');
+    });
+  });
 });

src/server/lib/envVariables.ts

@@ -205,6 +205,8 @@ export abstract class EnvironmentVariables {
       buildSHA: build.sha,
       pullRequestNumber: build.pullRequest?.pullRequestNumber,
       namespace: build.namespace,
+      branchName: build.pullRequest?.branchName,
+      repoName: build.pullRequest?.fullName,
     });
 
     return availableEnv;

src/server/lib/tests/buildEnvVariables.test.ts

@@ -459,6 +459,8 @@ describe('EnvironmentVariables', () => {
             buildSHA: 'abcdef',
             pullRequestNumber: '12345',
             namespace: 'testns',
+            branchName: 'feat/my-feature',
+            repoName: 'myorg/myrepo',
           }
         )
       ).toEqual({
@@ -531,6 +533,8 @@ describe('EnvironmentVariables', () => {
         buildUUID: 'mock-test-12345',
         pullRequestNumber: '12345',
         namespace: 'testns',
+        branchName: 'feat/my-feature',
+        repoName: 'myorg/myrepo',
       });
     });
   });