Add basic Bazel build/test CI matrix for Ubuntu #11

	name: Build/Test

	on:
	push:
	branches:
	- main
	tags:
	- "**"
	pull_request:
	branches:
	- main
	workflow_dispatch:

	# only run one build doc workflow at a time, cancel any running ones
	#concurrency:
	# group: ${{ github.workflow }}-${{ github.ref }}
	# cancel-in-progress: true

	jobs:
	build_test:
	strategy:
	matrix:
	os:
	- ubuntu
	version:
	- 20.04
	- 22.04
	runs-on: ${{ matrix.os }}-${{ matrix.version }}
	steps:
	- uses: actions/checkout@v3
	- name: Specify the Bazel cache
	uses: actions/cache@v3
	with:
	path: "/home/runner/.cache/bazel"
	key: ${{ hashFiles('.bazelrc', '.bazelversion', 'WORKSPACE', 'WORKSPACE.bazel', 'MODULE.bazel') }}
	- name: Build
	# TODO(evan.flynn): uncomment once the rules are properly fixed
	# run: bazel build //...
	run: bazel build -- $(cat repos/config/bazel.repos \| sed -e '/^[#r]/d' -e '/^ /d' -e 's%/%.%' -e 's% $.*$:%@\1//...%' -e '/@ros2.rosidl/d' -e '/@ros2.rcl_interfaces/d' -e '/@ros2.common_interfaces/d')
	- name: Test
	run: bazel test //...

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