ci: Automate container building in Gitlab

This removes the need to manually build and push out the Docker images
for the build. This step is now in GitLab CI itself.

.gitlab-ci.yml

@@ -1,7 +1,52 @@
-image: registry.freedesktop.org/pipewire/pipewire/fedora:31
+stages:
+  - container
+  - build
+
+variables:
+  # Update this tag when you want to trigger a rebuild
+  FEDORA_TAG: '2019-11-21-01'
+  FEDORA_VERSION: '31'
+  FEDORA_IMAGE: "$CI_REGISTRY_IMAGE/fedora/$FEDORA_VERSION:$FEDORA_TAG"
+
+include:
+  - project: 'wayland/ci-templates'
+    ref: master
+    file: '/templates/fedora.yml'
+
+build-container:
+  extends: .fedora@container-ifnot-exists
+  stage: container
+  variables:
+    GIT_STRATEGY: none # no need to pull the whole tree for rebuilding the image
+    FEDORA_RPMS: >-
+      alsa-lib-devel
+      bluez-libs-devel
+      dbus-devel
+      doxygen
+      findutils
+      gcc
+      git
+      glib-devel
+      graphviz
+      gstreamer1-devel
+      gstreamer1-plugins-base-devel
+      jack-audio-connection-kit-devel
+      libv4l-devel
+      libva-devel
+      libX11-devel
+      make
+      meson
+      pulseaudio-libs-devel
+      sbc-devel
+      SDL2-devel
+      systemd-devel
+      vulkan-loader-devel
+      which
+      xmltoman
 
 build:
   stage: build
+  image: $FEDORA_IMAGE
   script:
      - ./autogen.sh -Ddocs=true -Daudiomixer=true -Daudiotestsrc=true -Dtest=true -Dvideotestsrc=true -Dvolume=true
      - make

Dockerfile

@@ -1,33 +0,0 @@
-FROM fedora:31
-ARG FEDORA_VER=31
-
-LABEL description="Fedora-based environment for building PipeWire" \
-      maintainer="George Kiagiadakis <george.kiagiadakis@collabora.com>"
-
-# Install pipewire dependencies
-RUN dnf -y install \
-    which \
-    gcc \
-    meson \
-    systemd-devel \
-    dbus-devel \
-    glib-devel \
-    gstreamer1-devel \
-    gstreamer1-plugins-base-devel \
-    jack-audio-connection-kit-devel \
-    pulseaudio-libs-devel \
-    alsa-lib-devel \
-    libv4l-devel \
-    libX11-devel \
-    SDL2-devel \
-    libva-devel \
-    bluez-libs-devel \
-    sbc-devel \
-    doxygen \
-    graphviz \
-    xmltoman \
-    vulkan-loader-devel \
-    git \
-    make \
-    findutils \
-    && dnf clean all

doc/ci.md

@@ -1,30 +0,0 @@
-# Continuous Integration
-
-Our CI runs on the `gitlab.freedesktop.org` infrastructure. Steps can be found
-in the top-level `gitlab-ci.yml` file.
-
-The current build happens on an x86_64, Fedora 31 image. This should be
-extended to other distrubtions and architectures over time.
-
-## fd.o Registry
-
-The Docker image used for the build process comes from the
-`registry.freedesktop.org` container registry. Images are currently manually
-generate and pushed using the top-level `Dockerfile` and the following steps.
-The assumption is that you are using `podman` as a `docker` alternative. The
-corresponding `docker` command should be easy to find.
-
-```sh
-$ cd <pipewire-top-level-direcory>
-
-# Build the image
-$ podman build --format=docker -t registry.freedesktop.org/pipewire/pipewire/fedora:31 .
-
-# This is usually only needed once. You will be prompted for your fd.o
-# username, and the password is a personal access token that you must generate
-# in the gitlab.fd.o user settings.
-$ podman login
-
-# Upload the image
-$ podman push registry.freedesktop.org/pipewire/pipewire/fedora:31
-```