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# Reusable workflow that can be referenced by repositories in their .github/workflows/ci.yaml. | ||
# See example usage in https://github.com/bazel-contrib/rules-template/blob/main/.github/workflows/ci.yaml | ||
# | ||
# This assumes the repo calling the workflow has at least these files: | ||
# - .github/workflows/ci.bazelrc | ||
# - .bazelrc | ||
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on: | ||
# Make this workflow reusable, see | ||
# https://github.blog/2022-02-10-using-reusable-workflows-github-actions | ||
workflow_call: | ||
inputs: | ||
folders: | ||
required: true | ||
# JSON is needed because list is not supported: | ||
# https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#onworkflow_callinputsinput_idtype | ||
description: | | ||
JSON-formatted array of folders to run 'bazel test' in | ||
For example, '[".", "e2e/smoke"]' | ||
type: string | ||
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jobs: | ||
# matrix-prep-* steps generate JSON used to create a dynamic actions matrix. | ||
# Insanely complex for how simple this requirement is inspired from | ||
# https://stackoverflow.com/questions/65384420/how-to-make-a-github-action-matrix-element-conditional | ||
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matrix-prep-os: | ||
# Prepares the 'os' axis of the test matrix, to reduce costs since GitHub hosted runners cost more on some platforms. | ||
# https://docs.github.com/en/billing/managing-billing-for-github-actions/about-billing-for-github-actions#included-storage-and-minutes | ||
runs-on: ubuntu-latest | ||
steps: | ||
- id: linux | ||
run: echo "os=ubuntu-latest" >> $GITHUB_OUTPUT | ||
- id: windows | ||
run: echo "os=windows-latest" >> $GITHUB_OUTPUT | ||
# Only run on main branch (or PR branches that contain 'windows') to minimize Windows minutes (billed at 2X) | ||
if: github.ref == 'refs/heads/main' || contains(github.head_ref, 'windows') | ||
- id: macos | ||
run: echo "os=macos-latest" >> $GITHUB_OUTPUT | ||
# Only run on main branch (or PR branches that contain 'macos') to minimize macOS minutes (billed at 10X) | ||
if: github.ref == 'refs/heads/main' || contains(github.head_ref, 'macos') | ||
outputs: | ||
# Will look like ["ubuntu-latest", "windows-latest", "macos-latest"] | ||
os: ${{ toJSON(steps.*.outputs.os) }} | ||
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matrix-prep-bzlmod: | ||
runs-on: ubuntu-latest | ||
steps: | ||
- uses: actions/checkout@v3 | ||
- id: bzlmod | ||
run: [[ -f MODULE.bazel || -f WORKSPACE.bzlmod ]] && echo "bzlmods=true" >> $GITHUB_OUTPUT | ||
- id: workspace | ||
run: [[ -f WORKSPACE.bazel || -f WORKSPACE ]] && echo "bzlmods=false" >> $GITHUB_OUTPUT | ||
outputs: | ||
# Will look like ["<version from .bazelversion>", "5.3.2"] | ||
bzlmods: ${{ toJSON(steps.*.outputs.bzlmods) }} | ||
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matrix-prep-bazelversion: | ||
# Prepares the 'bazelversion' axis of the test matrix | ||
runs-on: ubuntu-latest | ||
steps: | ||
- uses: actions/checkout@v3 | ||
- id: bazel_from_bazelversion | ||
run: echo "bazelversion=$(head -n 1 .bazelversion)" >> $GITHUB_OUTPUT | ||
- id: bazel_5 | ||
run: echo "bazelversion=5.3.2" >> $GITHUB_OUTPUT | ||
outputs: | ||
# Will look like ["<version from .bazelversion>", "5.3.2"] | ||
bazelversions: ${{ toJSON(steps.*.outputs.bazelversion) }} | ||
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test: | ||
# The type of runner that the job will run on | ||
runs-on: ${{ matrix.os }} | ||
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needs: | ||
- matrix-prep-bazelversion | ||
- matrix-prep-os | ||
- matrix-prep-bzlmod | ||
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# Run bazel test in each workspace with each version of Bazel supported | ||
strategy: | ||
fail-fast: false | ||
matrix: | ||
os: ${{ fromJSON(needs.matrix-prep-os.outputs.os) }} | ||
bazelversion: ${{ fromJSON(needs.matrix-prep-bazelversion.outputs.bazelversions) }} | ||
folder: ${{ fromJSON(inputs.folders) }} | ||
bzlmodEnabled: ${{ fromJSON(needs.matrix-prep-bzlmod.outputs.bzlmods) }} | ||
exclude: | ||
# Don't test bzlmod with Bazel 5 (not supported) | ||
- bazelversion: 5.3.2 | ||
bzlmodEnabled: true | ||
# Don't test macos with Bazel 5 to minimize macOS minutes (billed at 10X) | ||
# https://docs.github.com/en/billing/managing-billing-for-github-actions/about-billing-for-github-actions#included-storage-and-minutes | ||
- os: macos-latest | ||
bazelversion: 5.3.2 | ||
# Don't test Windows with Bazel 5 to minimize Windows minutes (billed at 2X) | ||
# https://docs.github.com/en/billing/managing-billing-for-github-actions/about-billing-for-github-actions#included-storage-and-minutes | ||
- os: windows-latest | ||
bazelversion: 5.3.2 | ||
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# Steps represent a sequence of tasks that will be executed as part of the job | ||
steps: | ||
# Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it | ||
- uses: actions/checkout@v3 | ||
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# Cache build and external artifacts so that the next ci build is incremental. | ||
# Because github action caches cannot be updated after a build, we need to | ||
# store the contents of each build in a unique cache key, then fall back to loading | ||
# it on the next ci run. We use hashFiles(...) in the key and restore-keys- with | ||
# the prefix to load the most recent cache for the branch on a cache miss. You | ||
# should customize the contents of hashFiles to capture any bazel input sources, | ||
# although this doesn't need to be perfect. If none of the input sources change | ||
# then a cache hit will load an existing cache and bazel won't have to do any work. | ||
# In the case of a cache miss, you want the fallback cache to contain most of the | ||
# previously built artifacts to minimize build time. The more precise you are with | ||
# hashFiles sources the less work bazel will have to do. | ||
- name: Mount bazel caches | ||
uses: actions/cache@v3 | ||
with: | ||
path: | | ||
~/.cache/bazel | ||
~/.cache/bazel-repo | ||
key: bazel-cache-${{ hashFiles('**/BUILD.bazel', '**/*.bzl', 'WORKSPACE') }} | ||
restore-keys: bazel-cache- | ||
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- name: Configure Bazel version | ||
working-directory: ${{ matrix.folder }} | ||
run: echo "${{ matrix.bazelversion }}" > .bazelversion | ||
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- name: Check for test.sh | ||
# Checks for the existence of test.sh in the folder. Downstream steps can use | ||
# steps.has_test_sh.outputs.files_exists as a conditional. | ||
id: has_test_sh | ||
uses: andstor/file-existence-action@v2 | ||
with: | ||
files: "${{ matrix.folder }}/test.sh" | ||
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- name: Set bzlmod flag | ||
# Store the --enable_bzlmod flag that we add to the test command below | ||
# only when we're running bzlmod in our test matrix. | ||
id: set_bzlmod_flag | ||
if: matrix.bzlmodEnabled | ||
run: echo "bzlmod_flag=--enable_bzlmod" >> $GITHUB_OUTPUT | ||
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- name: bazel test //... | ||
env: | ||
# Bazelisk will download bazel to here, ensure it is cached between runs. | ||
XDG_CACHE_HOME: ~/.cache/bazel-repo | ||
working-directory: ${{ matrix.folder }} | ||
run: bazel --bazelrc=${{ github.workspace }}/.github/workflows/ci.bazelrc --bazelrc=.bazelrc test ${{ steps.set_bzlmod_flag.outputs.bzlmod_flag }} //... | ||
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- name: ./test.sh | ||
# Run if there is a test.sh file in the folder | ||
# Don't run integration tests on Windows since they are bash scripts and Windows runs Powershell | ||
if: steps.has_test_sh.outputs.files_exists == 'true' && ! startsWith(matrix.os, 'windows') | ||
working-directory: ${{ matrix.folder }} | ||
shell: bash | ||
# Run the script potentially setting BZLMOD_FLAG=--enable_bzlmod. All test.sh | ||
# scripts that run bazel directly should make use of this variable. | ||
run: BZLMOD_FLAG=${{ steps.set_bzlmod_flag.outputs.bzlmod_flag }} ./test.sh |
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