ci: build inside docker

Avoid reinstalling dependencies

.github/workflows/build.yml

@@ -6,23 +6,56 @@ on:
     branches: [ "master" ]
 
 jobs:
+  docker:
+
+    strategy:
+      matrix:
+        ubuntu: [22.04, 20.04]
+        libgtk: [libgtk-3-dev, libgtk2.0-dev]
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v3
+
+    - name: Set up Docker Buildx
+      uses: docker/setup-buildx-action@v2
+    - name: Login to Docker Hub
+      uses: docker/login-action@v2
+      with:
+        registry: ghcr.io
+        username: ${{ github.repository_owner }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+    - uses: dorny/paths-filter@v2
+      id: changes
+      with:
+        filters: |
+          docker:
+            - 'docker/**'
+    - name: Build and push
+      uses: docker/build-push-action@v4
+      with:
+        context: "{{defaultContext}}:docker/build"
+        push: true
+        tags: ghcr.io/viking-gps/viking-build-env:${{ matrix.ubuntu }}-${{ matrix.libgtk }}
+      if: steps.changes.outputs.docker == 'true'
+
   build:
+    if: ${{ always() }}
+    needs: docker
 
     strategy:
       fail-fast: false
       matrix:
         os: [ubuntu-22.04, ubuntu-20.04]
         libgtk: [libgtk-3-dev, libgtk2.0-dev]
 
-    runs-on: ${{ matrix.os }}
+    runs-on: ubuntu-latest
+    container:
+      image: ghcr.io/viking-gps/viking-build-env:${{ matrix.ubuntu }}-${{ matrix.libgtk }}
 
     steps:
     - uses: actions/checkout@v3
 
-    - name: "Install requirements"
-      run: sudo apt-get install gtk-doc-tools docbook-xsl yelp-tools libpng-dev ${{ matrix.libgtk }} libicu-dev libjson-glib-dev intltool autopoint xxd libcurl4-gnutls-dev libglib2.0-dev-bin libsqlite3-dev nettle-dev libmapnik-dev libgeoclue-2-dev libgexiv2-dev libgps-dev libmagic-dev libbz2-dev libzip-dev liboauth-dev libnova-dev
-      shell: bash
-
     - name: Prepare
       run: ./autogen.sh ${{ matrix.libgtk == 'libgtk2.0-dev' && '--enable-gtk2' }}
 

docker/build/Dockerfile

@@ -0,0 +1,10 @@
+ARG UBUNTU_VERSION=22.04
+
+FROM ubuntu:$UBUNTU_VERSION
+
+ARG LIBGTK=libgtk-3-dev
+
+ENV DEBIAN_FRONTEND=noninteractive
+RUN apt update && \
+    apt install -y gtk-doc-tools docbook-xsl yelp-tools libpng-dev $LIBGTK libicu-dev libjson-glib-dev intltool autopoint xxd libcurl4-gnutls-dev libglib2.0-dev-bin libsqlite3-dev nettle-dev libmapnik-dev libgeoclue-2-dev libgexiv2-dev libgps-dev libmagic-dev libbz2-dev libzip-dev liboauth-dev libnova-dev && \
+    rm -rf /var/lib/apt/lists/*

docker/build/Makefile

@@ -0,0 +1,18 @@
+all: \
+	ubuntu2004-gtk3 \
+	ubuntu2004-gtk2 \
+	ubuntu2204-gtk3 \
+	ubuntu2204-gtk2
+
+ubuntu2004-gtk3:
+	docker build --build-arg UBUNTU_VERSION=20.04 --build-arg LIBGTK=libgtk-3-dev -t viking-build:$@ .
+
+ubuntu2004-gtk2:
+	docker build --build-arg UBUNTU_VERSION=20.04 --build-arg LIBGTK=libgtk2.0-dev -t viking-build:$@ .
+
+ubuntu2204-gtk3:
+	docker build --build-arg UBUNTU_VERSION=22.04 --build-arg LIBGTK=libgtk-3-dev -t viking-build:$@ .
+
+ubuntu2204-gtk2:
+	docker build --build-arg UBUNTU_VERSION=22.04 --build-arg LIBGTK=libgtk2.0-dev -t viking-build:$@ .
+