Use cron jobs from Circleci to trigger Docker Hub builds

.circleci/config.yml

@@ -0,0 +1,84 @@
+version: 2.1
+
+references:
+  trigger_osrf_ros2_nightly: &trigger_osrf_ros2_nightly
+    trigger_docker_hub:
+      url: ${DOCKER_TRIGGER_URL_ROS2}
+      data: >-
+        '{"docker_tag": "nightly"}'
+  trigger_osrf_ros2_devel: &trigger_osrf_ros2_devel
+    trigger_docker_hub:
+      url: ${DOCKER_TRIGGER_URL_ROS2}
+      data: >-
+        '{"docker_tag": "devel"}'
+
+commands:
+  trigger_docker_hub:
+    description: "Trigger Docker Hub"
+    parameters:
+      data:
+        type: string
+      url:
+        type: string
+    steps:
+      - run:
+          name: Trigger Docker Hub
+          command: |
+            curl --request POST \
+              --header "Content-Type: application/json" \
+              --data << parameters.data >> \
+              --url << parameters.url >> \
+            > /dev/null && true
+          when: always
+
+executors:
+  docker_exec:
+    docker:
+      - image: circleci/python
+
+jobs:
+  osrf_ros2:
+    executor: docker_exec
+    steps:
+      - *trigger_osrf_ros2_nightly
+      - *trigger_osrf_ros2_devel
+  osrf_ros2_nightly:
+    executor: docker_exec
+    steps:
+      - *trigger_osrf_ros2_nightly
+  osrf_ros2_devel:
+    executor: docker_exec
+    steps:
+      - *trigger_osrf_ros2_devel
+
+workflows:
+  version: 2
+  deploy:
+    jobs:
+      - osrf_ros2:
+          context: dockerhub
+          filters:
+            branches:
+              only: master
+  nightly:
+    jobs:
+      - osrf_ros2_nightly:
+          context: dockerhub
+    triggers:
+      - schedule:
+          cron: "0 0 * * *"
+          filters:
+            branches:
+              only:
+                - master
+  daily:
+    jobs:
+      - osrf_ros2_devel:
+          context: dockerhub
+    triggers:
+      - schedule:
+          cron: "0 12 * * *"
+          filters:
+            branches:
+              only:
+                - master