[libmanette] ci: Add the dependencies task

[Adrien Plazas <aplazas src gnome org>]

commit 014c0bfc8bc9b723f1ecb4bd9ba4b1fcd20f51f0
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Thu Nov 12 09:43:43 2020 +0100

    ci: Add the dependencies task
    
    It will be used as a base for other Flatpak-based tasks as we don't need
    to rebuild it every time.

 .gitlab-ci.yml | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 1ef8854..1889b68 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -6,12 +6,30 @@ stages:
 
 variables:
   BUNDLE: 'manette-test-git.flatpak'
+  FLATPAK_BUILD_DIR: app
+  SHARED_MESON_ARGS: >-
+    --buildtype=release
+    -Ddemos=false
 
 lint:
   stage: pre
   script:
     - tools/check-api-visibility.sh
 
+dependencies:
+  image: registry.gitlab.gnome.org/gnome/gnome-runtime-images/gnome:master
+  stage: pre
+  tags:
+    - flatpak
+  variables:
+    MANIFEST_PATH: demos/manette-test/org.gnome.Manette.Test.json
+    FLATPAK_MODULE: libmanette
+  script:
+    - flatpak-builder --user --disable-rofiles-fuse --stop-at=${FLATPAK_MODULE} ${FLATPAK_BUILD_DIR} 
${MANIFEST_PATH}
+  artifacts:
+    paths:
+      - ${FLATPAK_BUILD_DIR}
+
 flatpak:
   extends: '.flatpak'
   variables: