Add flatpak-manifest-update check

Issue: #2

.circleci/config.yml

@@ -0,0 +1,84 @@
+version: 2.1
+
+executors:
+  fedora:
+    docker:
+     - image: fedora:32
+       auth:
+         username: $DOCKER_USERNAME
+         password: $DOCKER_PASSWORD
+
+commands:
+
+  install-common-deps:
+    steps:
+      - run:
+          name: Install common dependencies
+          command: |
+            dnf update -y > /dev/null
+            dnf install -y \
+              gcc \
+              gcc-c++ \
+              git \
+              python3 \
+              python3-devel \
+              python3-pip
+      - run:
+          name: Clone flatpak-manifest-update
+          working_directory: ~/workdir
+          command: |
+            git clone https://github.com/tiliado/flatpak-manifest-update.git --depth 500
+            python3 -m pip install -r flatpak-manifest-update/requirements.txt
+
+  check-updates:
+    parameters:
+      manifest:
+        type: string
+    steps:
+      - checkout:
+          path: ~/workdir/flatpaks
+      - run:
+          name: Check manifest
+          working_directory: ~/workdir/flatpak-manifest-update
+          command: |
+            python3 flatpak-manifest-update.py ../flatpaks/manifests/<< parameters.manifest >>
+
+jobs:
+  check-cdk-master:
+    executor: fedora
+    working_directory: ~/workdir
+    steps:
+      - install-common-deps
+      - check-updates:
+          manifest: master/eu.tiliado.NuvolaCdk.yml
+
+  check-cdk-experimental:
+    executor: fedora
+    working_directory: ~/workdir
+    steps:
+      - install-common-deps
+      - check-updates:
+          manifest: experimental/eu.tiliado.NuvolaCdk.yml
+
+x-jobs: &jobs
+  jobs:
+    - check-cdk-master:
+        context: docker-hub-tiliado
+    # Build with latest stable Vala from git.
+    - check-cdk-experimental:
+        context: docker-hub-tiliado
+
+workflows:
+  version: 2
+  build:
+    <<: *jobs
+  nightly:
+    <<: *jobs
+    triggers:
+      - schedule:
+          cron: "0 2 * * *"
+          filters:
+            branches:
+              only:
+                - devel
+