ci: add deploy jobs triggering gst-plugins-rs image updates

Those jobs will trigger a rebuild of gst-plugins-rs when our images are
updated.

.gitlab-ci.yml

@@ -17,7 +17,7 @@
 # Updating the nightly image should be done by simply running a scheduled ci
 # pipeline on the upstream repo with the $UPDATE_NIGHTLY variable defined.
 
-.templates_sha: &templates_sha acda94e139030dc2caa058118956225e55bbec5f
+.templates_sha: &templates_sha 1f82c62c196cd53d168b74e85b0a19ea48c1e2b9
 
 include:
   - project: 'freedesktop/ci-templates'
@@ -34,6 +34,7 @@ stages:
   - "lint"
   - "test"
   - "extras"
+  - "deploy"
 
 .debian:10:
   variables:
@@ -117,6 +118,57 @@ update-nightly:
     - .dist-debian-container
     - .debian:10-nightly
 
+# GST_PLUGINS_RS_TOKEN is a variable of type 'Var' defined in gstreamer-rs CI
+# settings and containing a gst-plugins-rs pipeline trigger token
+.plugins-update:
+  stage: deploy
+  script:
+    - |
+    # FDO_DISTRIBUTION_IMAGE still has indirections
+    - echo $FDO_DISTRIBUTION_IMAGE
+    - DISTRO_IMAGE=$(eval echo ${FDO_DISTRIBUTION_IMAGE})
+    - echo $DISTRO_IMAGE
+    # retrieve the infos from the registry
+    - JSON_IMAGE=$(skopeo inspect docker://$DISTRO_IMAGE)
+    - IMAGE_PIPELINE_ID=$(echo $JSON_IMAGE | jq -r '.Labels["fdo.pipeline_id"]')
+    - echo $IMAGE_PIPELINE_ID
+    - echo $CI_PIPELINE_ID
+    - |
+      if [[ x"$IMAGE_PIPELINE_ID" == x"$CI_PIPELINE_ID" ]]; then
+        echo "Image has been updated, notify gst-plugins-rs"
+        curl -X POST -F "token=$GST_PLUGINS_RS_TOKEN" -F "ref=fdo-template" -F "variables[UPDATE_IMG]=$UPDATE_IMG" https://gitlab.freedesktop.org/api/v4/projects/1400/trigger/pipeline
+      else
+        echo "Image has not been updated, ignore"
+      fi
+  rules:
+    - if: '$CI_COMMIT_REF_NAME == "master" && $CI_PROJECT_PATH == "gstreamer/gstreamer-rs"'
+
+# Those jobs need to use another image as ours doesn't have 'skopeo'
+# and it's not easily installable in Debian stable for now.
+plugins-update-stable:
+  extends:
+    - .plugins-update
+    - .img-stable
+  image: registry.freedesktop.org/freedesktop/ci-templates/buildah:2020-03-04
+  variables:
+    UPDATE_IMG: "stable"
+
+plugins-update-1-40:
+  extends:
+    - .plugins-update
+    - .img-1-40
+  image: registry.freedesktop.org/freedesktop/ci-templates/buildah:2020-03-04
+  variables:
+    UPDATE_IMG: "1-40"
+
+plugins-update-nightly:
+  extends:
+    - .plugins-update
+    - .img-nightly
+  image: registry.freedesktop.org/freedesktop/ci-templates/buildah:2020-03-04
+  variables:
+    UPDATE_IMG: "nightly"
+
 .cargo test:
   stage: "test"
   script: