fix(devtools): urlencode task IDs when calling trigger route

Signed-off-by: thomvaill <thomvaill@bluebricks.dev>

.changeset/cold-dodos-think.md

@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-devtools': patch
+---
+
+Fixed URL encoding of task IDs for the trigger feature (tasks that contained a "/" in their ID were not triggered)

plugins/devtools/src/api/DevToolsClient.test.ts

@@ -0,0 +1,49 @@
+/*
+ * Copyright 2026 The Backstage Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { DevToolsClient } from './DevToolsClient';
+
+describe('DevToolsClient', () => {
+  const mockBaseUrl = 'http://backstage/api/catalog';
+  const discoveryApi = {
+    getBaseUrl: async (pluginId: string) => `${mockBaseUrl}/${pluginId}`,
+  };
+  const mockFetch = jest.fn();
+  const fetchApi = { fetch: mockFetch };
+
+  let client: DevToolsClient;
+  beforeEach(() => {
+    mockFetch.mockResolvedValue({
+      ok: true,
+      json: async () => ({ status: 'triggered' }),
+    });
+    client = new DevToolsClient({ discoveryApi, fetchApi });
+  });
+
+  afterEach(() => jest.resetAllMocks());
+
+  it('should URL-encode the taskId when triggering a scheduled task', async () => {
+    await client.triggerScheduledTask(
+      'my-plugin',
+      'task/with/slashes:and-special-chars',
+    );
+
+    expect(mockFetch).toHaveBeenCalledWith(
+      `${mockBaseUrl}/my-plugin/.backstage/scheduler/v1/tasks/task%2Fwith%2Fslashes%3Aand-special-chars/trigger`,
+      { method: 'POST' },
+    );
+  });
+});

plugins/devtools/src/api/DevToolsClient.ts

@@ -70,7 +70,7 @@ export class DevToolsClient implements DevToolsApi {
   ): Promise<TriggerScheduledTask> {
     const baseUrl = `${await this.discoveryApi.getBaseUrl(plugin)}/`;
     const url = new URL(
-      `.backstage/scheduler/v1/tasks/${taskId}/trigger`,
+      `.backstage/scheduler/v1/tasks/${encodeURIComponent(taskId)}/trigger`,
       baseUrl,
     );