Add a PR job for building dockerfiles (backport #929) (#931)

Author: mergify[bot]

.github/workflows/dockerfile-build.yml

@@ -0,0 +1,47 @@
+name: Dockerfile Build
+
+on:
+  workflow_dispatch:
+  pull_request:
+    paths:
+      - "Dockerfile/**"
+      - ".github/workflows/dockerfile-build.yml"
+  schedule:
+    - cron: "17 4 * * MON-FRI"
+
+jobs:
+  dockerfile-build-scheduled:
+    if: github.event_name == 'schedule' || github.event_name == 'workflow_dispatch'
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        ros-distro: [humble, jazzy, kilted, lyrical, rolling]
+
+    steps:
+      - name: Checkout distro branch
+        uses: actions/checkout@v7
+        with:
+          ref: ${{ matrix.ros-distro }}
+
+      - name: Build Dockerfile
+        run: |
+          docker build \
+            --file Dockerfile/Dockerfile \
+            --build-arg BASE_IMAGE=ghcr.io/ros-controls/ros:${{ matrix.ros-distro }}-ubuntu-testing \
+            Dockerfile
+
+  dockerfile-build-pr:
+    if: github.event_name == 'pull_request'
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout PR changes
+        uses: actions/checkout@v7
+
+      - name: Build Dockerfile
+        run: |
+          docker build \
+            --file Dockerfile/Dockerfile \
+            --build-arg BASE_IMAGE=ghcr.io/ros-controls/ros:${{ github.base_ref }}-ubuntu-testing \
+            Dockerfile

Dockerfile/Dockerfile

@@ -1,30 +1,7 @@
-FROM ubuntu:24.04
+ARG BASE_IMAGE=ghcr.io/ros-controls/ros:kilted-ubuntu-testing
+FROM ${BASE_IMAGE}
 
 ENV DEBIAN_FRONTEND noninteractive
-ENV ROS_DISTRO rolling
-
-# Make sure everything is up to date before building from source
-RUN apt-get update \
-  && apt-get upgrade -y \
-  && apt-get update && apt-get install -q -y --no-install-recommends \
-    dirmngr \
-    gnupg \
-    lsb-release \
-    wget \
-    curl \
-    git \
-    ca-certificates \
-    build-essential \
-    cmake \
-  && apt-get clean
-
-RUN curl -sSL https://raw.githubusercontent.com/ros/rosdistro/master/ros.key -o /usr/share/keyrings/ros-archive-keyring.gpg && \
-  echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/ros-archive-keyring.gpg] http://packages.ros.org/ros2/ubuntu $(. /etc/os-release && echo $UBUNTU_CODENAME) main" | tee /etc/apt/sources.list.d/ros2.list > /dev/null && \
-  apt-get update && apt-get install -q -y --no-install-recommends \
-    python3-colcon-ros \
-    python3-colcon-common-extensions \
-    python3-rosdep \
-    && apt-get clean
 
 RUN mkdir -p /home/ros2_ws/src \
     && cd /home/ros2_ws/src \
@@ -33,7 +10,8 @@ RUN mkdir -p /home/ros2_ws/src \
     else \
       git clone https://github.com/ros-controls/gz_ros2_control/ -b ${ROS_DISTRO}; \
     fi \
-    && rosdep init && rosdep update \
+    && rosdep update \
+    && apt-get update \
     && rosdep install --from-paths ./ -i -y --rosdistro ${ROS_DISTRO}
 
 RUN cd /home/ros2_ws/ \