ci: add gtk4 to the image

This is a prerequisite to porting the examples to gtk4

.gitlab-ci.yml

@@ -100,8 +100,11 @@ stages:
   - .fdo.container-build@debian
   stage: container-base
   variables:
-    FDO_DISTRIBUTION_PACKAGES: "build-essential curl python3-setuptools liborc-0.4-dev libglib2.0-dev libxml2-dev libgtk-3-dev libegl1-mesa libgles2-mesa libgl1-mesa-dri libgl1-mesa-glx libwayland-egl1-mesa xz-utils libssl-dev git wget ca-certificates ninja-build python3-pip flex bison libglib2.0-dev libx11-dev libx11-xcb-dev libsoup2.4-dev libvorbis-dev libogg-dev libtheora-dev libmatroska-dev libvpx-dev libopus-dev"
+    FDO_DISTRIBUTION_PACKAGES: "build-essential curl python3-setuptools liborc-0.4-dev libglib2.0-dev libxml2-dev libgtk-3-dev libegl1-mesa libgles2-mesa libgl1-mesa-dri libgl1-mesa-glx libwayland-egl1-mesa xz-utils libssl-dev git wget ca-certificates ninja-build python3-pip flex bison libglib2.0-dev libx11-dev libx11-xcb-dev libsoup2.4-dev libvorbis-dev libogg-dev libtheora-dev libmatroska-dev libvpx-dev libopus-dev libgraphene-1.0-dev"
-    FDO_DISTRIBUTION_EXEC: 'bash ci/install-gst.sh && pip3 install git+http://gitlab.freedesktop.org/freedesktop/ci-templates'
+    FDO_DISTRIBUTION_EXEC: >-
+      bash ci/install-gst.sh &&
+      bash ci/install-gtk4.sh &&
+      pip3 install git+http://gitlab.freedesktop.org/freedesktop/ci-templates
 
 .build-final-image:
   extends:

ci/images_template.yml

@@ -1,4 +1,4 @@
 variables:
-  GST_RS_IMG_TAG: '2021-12-02.0'
+  GST_RS_IMG_TAG: '2022-01-11.0'
   GST_RS_STABLE: '1.57.0'
   GST_RS_MSRV: '1.56.0'

ci/install-gtk4.sh

@@ -0,0 +1,10 @@
+set -eux
+
+BRANCH=gtk-4-4
+
+git clone https://gitlab.gnome.org/GNOME/gtk.git --branch $BRANCH --depth=1
+cd gtk
+meson build -D prefix=/usr/local
+ninja -C build
+ninja -C build install
+cd ..