feat(jenkins-backend): add multiple branch support

Signed-off-by: planeiii <planeiii@thousandeyes.com>

plugins/jenkins-backend/src/service/jenkinsApi.test.ts

@@ -134,6 +134,34 @@ describe('JenkinsApi', () => {
         });
         expect(result).toHaveLength(1);
       });
+
+      it('supports multiple branches', async () => {
+        mockedJenkinsClient.job.get.mockResolvedValue(project);
+
+        const result = await jenkinsApi.getProjects(
+          jenkinsInfo,
+          'foo,bar,catpants',
+        );
+
+        expect(mockedJenkins).toHaveBeenCalledWith({
+          baseUrl: jenkinsInfo.baseUrl,
+          headers: jenkinsInfo.headers,
+          promisify: true,
+        });
+        expect(mockedJenkinsClient.job.get).toBeCalledWith({
+          name: `${jenkinsInfo.jobFullName}/foo`,
+          tree: expect.anything(),
+        });
+        expect(mockedJenkinsClient.job.get).toBeCalledWith({
+          name: `${jenkinsInfo.jobFullName}/bar`,
+          tree: expect.anything(),
+        });
+        expect(mockedJenkinsClient.job.get).toBeCalledWith({
+          name: `${jenkinsInfo.jobFullName}/catpants`,
+          tree: expect.anything(),
+        });
+        expect(result).toHaveLength(1);
+      });
     });
     describe('augmented', () => {
       const projectWithScmActions: JenkinsProject = {

plugins/jenkins-backend/src/service/jenkinsApi.ts

@@ -75,13 +75,16 @@ export class JenkinsApiImpl {
     const projects: BackstageProject[] = [];
 
     if (branch) {
-      // we have been asked to filter to a single branch.
       // Assume jenkinsInfo.jobFullName is a folder which contains one job per branch.
       // TODO: extract a strategy interface for this
-      const job = await client.job.get({
-        name: `${jenkinsInfo.jobFullName}/${branch}`,
-        tree: JenkinsApiImpl.jobTreeSpec.replace(/\s/g, ''),
-      });
+      const job = await Promise.any(
+        branch.split(/,/g).map(name =>
+          client.job.get({
+            name: `${jenkinsInfo.jobFullName}/${name}`,
+            tree: JenkinsApiImpl.jobTreeSpec.replace(/\s/g, ''),
+          }),
+        ),
+      );
       projects.push(this.augmentProject(job));
     } else {
       // We aren't filtering