Fix part of #5343: Introduce new CI workflow for Code Coverage #3
Workflow file for this run
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| # Contains jobs corresponding to code coverage. | |
| name: Code Coverage | |
| # Controls when the action will run. Triggers the workflow on pull request | |
| # events or push events in the develop branch. | |
| on: | |
| workflow_dispatch: | |
| pull_request: | |
| push: | |
| branches: | |
| # Push events on develop branch | |
| - develop | |
| jobs: | |
| compute_changed_files: | |
| name: Compute changed files | |
| runs-on: ubuntu-20.04 | |
| outputs: | |
| matrix: ${{ steps.compute-file-matrix.outputs.matrix }} | |
| can_skip_tests: ${{ steps.compute-file-matrix.outputs.can_skip_files }} | |
| env: | |
| CACHE_DIRECTORY: ~/.bazel_cache | |
| steps: | |
| - uses: actions/checkout@v2 | |
| with: | |
| fetch-depth: 0 | |
| - name: Set up Bazel | |
| uses: abhinavsingh/setup-bazel@v3 | |
| with: | |
| version: 6.5.0 | |
| - uses: actions/cache@v2 | |
| id: scripts_cache | |
| with: | |
| path: ${{ env.CACHE_DIRECTORY }} | |
| key: ${{ runner.os }}-${{ env.CACHE_DIRECTORY }}-bazel-scripts-${{ github.sha }} | |
| restore-keys: | | |
| ${{ runner.os }}-${{ env.CACHE_DIRECTORY }}-bazel-scripts- | |
| ${{ runner.os }}-${{ env.CACHE_DIRECTORY }}-bazel- | |
| # This check is needed to ensure that Bazel's unbounded cache growth doesn't result in a | |
| # situation where the cache never updates (e.g. due to exceeding GitHub's cache size limit) | |
| # thereby only ever using the last successful cache version. This solution will result in a | |
| # few slower CI actions around the time cache is detected to be too large, but it should | |
| # incrementally improve thereafter. | |
| - name: Ensure cache size | |
| env: | |
| BAZEL_CACHE_DIR: ${{ env.CACHE_DIRECTORY }} | |
| run: | | |
| # See https://stackoverflow.com/a/27485157 for reference. | |
| EXPANDED_BAZEL_CACHE_PATH="${BAZEL_CACHE_DIR/#\~/$HOME}" | |
| CACHE_SIZE_MB=$(du -smc $EXPANDED_BAZEL_CACHE_PATH | grep total | cut -f1) | |
| echo "Total size of Bazel cache (rounded up to MBs): $CACHE_SIZE_MB" | |
| # Use a 4.5GB threshold since actions/cache compresses the results, and Bazel caches seem | |
| # to only increase by a few hundred megabytes across changes for unrelated branches. This | |
| # is also a reasonable upper-bound (local tests as of 2021-03-31 suggest that a full build | |
| # of the codebase (e.g. //...) from scratch only requires a ~2.1GB uncompressed/~900MB | |
| # compressed cache). | |
| if [[ "$CACHE_SIZE_MB" -gt 4500 ]]; then | |
| echo "Cache exceeds cut-off; resetting it (will result in a slow build)" | |
| rm -rf $EXPANDED_BAZEL_CACHE_PATH | |
| fi | |
| - name: Configure Bazel to use a local cache | |
| env: | |
| BAZEL_CACHE_DIR: ${{ env.CACHE_DIRECTORY }} | |
| run: | | |
| EXPANDED_BAZEL_CACHE_PATH="${BAZEL_CACHE_DIR/#\~/$HOME}" | |
| echo "Using $EXPANDED_BAZEL_CACHE_PATH as Bazel's cache path" | |
| echo "build --disk_cache=$EXPANDED_BAZEL_CACHE_PATH" >> $HOME/.bazelrc | |
| shell: bash | |
| - name: Compute file matrix | |
| id: compute-file-matrix | |
| env: | |
| compute_all_files: ${{ contains(github.event.pull_request.title, '[RunAllTests]') }} | |
| # See: https://docs.github.com/en/webhooks-and-events/webhooks/webhook-events-and-payloads#pull_request. Defer to origin/develop outside a PR (such as develop's main CI runs). | |
| base_commit_hash: ${{ github.event.pull_request.base.sha || 'origin/develop' }} | |
| # https://unix.stackexchange.com/a/338124 for reference on creating a JSON-friendly | |
| # comma-separated list of test targets for the matrix. | |
| run: | | |
| bazel run //scripts:compute_changed_files -- $(pwd) $(pwd)/changed_files.log $base_commit_hash compute_all_files=$compute_all_files | |
| FILE_BUCKET_LIST=$(cat ./changed_files.log | sed 's/^\|$/"/g' | paste -sd, -) | |
| echo "Changed files (note that this might be all files if configured to run all or on the develop branch): $FILE_BUCKET_LIST" | |
| echo "::set-output name=matrix::{\"changed-files-bucket-base64-encoded-shard\":[$FILE_BUCKET_LIST]}" | |
| if [[ ! -z "$FILE_BUCKET_LIST" ]]; then | |
| echo "::set-output name=can_skip_files::false" | |
| else | |
| echo "::set-output name=can_skip_files::true" | |
| echo "No files are affected by this change. If this is wrong, you can add '[RunAllTests]' to the PR title to force a run." | |
| fi | |