Gitlab CI: trigger the wayland web rebuild on pushes to master

This requires that WAYLAND_WEB_TOKEN is set up in the libinput settings on
gitlab.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

.gitlab-ci.yml

@@ -28,6 +28,7 @@ stages:
   - docker_check  # check if the current docker images are up to date
   - docker_prep   # rebuild the docker images if previous step failed
   - build         # for actually building things
+  - deploy        # trigger wayland's website generation
 
 variables:
   ###############################################################################
@@ -631,3 +632,23 @@ ubuntu:18.04@default-build:
 arch:rolling@default-build:
   <<: *arch_template
   <<: *default_build
+
+#
+# deploy
+#
+
+wayland-web:
+  image: registry.freedesktop.org/libinput/libinput/jq:latest
+  stage: deploy
+  script:
+    - curl --request POST
+           --form "token=$WAYLAND_WEB_TOKEN"
+           --form ref=master
+           https://gitlab.freedesktop.org/api/v4/projects/wayland${SLASH}wayland${DOT}freedesktop${DOT}org/trigger/pipeline
+  only:
+    refs:
+      - master
+  dependencies:
+  variables:
+    DOT: "%2E"
+    SLASH: "%2F"