Add galactic source build on galactic branch (#385)

* Add galactic source build on galactic branch

This will enable source builds on pushes to the galactic branch

* Rename galactic-source to galactic-source-build for consistency

Author: fmauch

.github/workflows/galactic-source-build.yml

@@ -0,0 +1,38 @@
+name: Galactic Source Build
+on:
+  push:
+    branches:
+      - galactic
+  # no schedule possible on other branch than default branch
+
+jobs:
+  galactic_source:
+    runs-on: ubuntu-20.04
+    strategy:
+      fail-fast: false
+    env:
+      ROS_DISTRO: galactic
+    steps:
+      - uses: ros-tooling/[email protected]
+        with:
+          required-ros-distributions: ${{ env.ROS_DISTRO }}
+      - uses: actions/checkout@v2
+      - uses: ros-tooling/[email protected]
+        with:
+          target-ros2-distro: ${{ env.ROS_DISTRO }}
+          # build all packages listed in the meta package
+          package-name:
+            ur_bringup
+            ur_controllers
+            ur_dashboard_msgs
+            ur_moveit_config
+            ur_robot_driver
+          vcs-repo-file-url: |
+            https://raw.githubusercontent.com/ros2/ros2/${{ env.ROS_DISTRO }}/ros2.repos
+            https://raw.githubusercontent.com/${{ github.repository }}/${{ github.sha }}/Universal_Robots_ROS2_Driver.${{ env.ROS_DISTRO }}.repos
+          colcon-mixin-repository: https://raw.githubusercontent.com/colcon/colcon-mixin-repository/master/index.yaml
+          skip-tests: true
+      - uses: actions/upload-artifact@v1
+        with:
+          name: colcon-logs-${{ matrix.os }}
+          path: ros_ws/log