Define a MSRV, use that toolchain by default. #52
Workflow file for this run
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| # Calculates the size diffs for the each example binary. Runs when a pull | |
| # request is created or modified. | |
| name: size-diff | |
| # We want to run this on all pull requests. Additionally, GitHub actions merge | |
| # queue needs workflows to run on the `merge_queue` trigger to block merges on | |
| # them. | |
| on: | |
| pull_request: | |
| merge_group: | |
| jobs: | |
| size-diff: | |
| # Using ubuntu-latest can cause breakage when ubuntu-latest is updated to | |
| # point at a new Ubuntu version. Instead, explicitly specify the version, so | |
| # we can update when we need to. This *could* break if we don't update it | |
| # until support for this version is dropped, but it is likely we'll have a | |
| # reason to update to a newer Ubuntu before then anyway. | |
| runs-on: ubuntu-22.04 | |
| steps: | |
| # Clones a single commit from the libtock-rs repository. The commit cloned | |
| # is a merge commit between the PR's target branch and the PR's source. | |
| # We'll later add another commit (the pre-merge target branch) to the | |
| # repository. | |
| - name: Clone repository | |
| uses: actions/checkout@v3 | |
| # The main diff script. Stores the sizes of the example binaries for both | |
| # the merge commit and the target branch. We display the diff in a | |
| # separate step to make it easy to navigate to in the GitHub Actions UI. | |
| # | |
| # If the build on master doesn't work (`make -j2 examples` fails), we | |
| # output a warning message and ignore the error. Ignoring the error | |
| # prevents this workflow from blocking PRs that fix a broken build in | |
| # master. | |
| - name: Compute sizes | |
| run: | | |
| UPSTREAM_REMOTE_NAME="${UPSTREAM_REMOTE_NAME:-origin}" | |
| GITHUB_BASE_REF="${GITHUB_BASE_REF:-master}" | |
| cd "${GITHUB_WORKSPACE}" | |
| make -j2 examples # The VM this runs on has 2 logical cores. | |
| cargo run --release -p print_sizes >'${{runner.temp}}/merge-sizes' | |
| git remote set-branches "${UPSTREAM_REMOTE_NAME}" "${GITHUB_BASE_REF}" | |
| git fetch --depth=1 "${UPSTREAM_REMOTE_NAME}" "${GITHUB_BASE_REF}" | |
| git checkout "${UPSTREAM_REMOTE_NAME}/${GITHUB_BASE_REF}" | |
| make -j2 examples && \ | |
| cargo run --release -p print_sizes >'${{runner.temp}}/base-sizes' || \ | |
| echo 'Broken build on the master branch.' | |
| # Computes and displays the size diff. diff returns a nonzero status code | |
| # if the files differ, and GitHub interprets a nonzero status code as an | |
| # error. To avoid GitHub interpreting a difference as an error, we add | |
| # || exit 0 to the command. This also prevents the workflow from failing | |
| # if the master build is broken and we didn't generate base-sizes. | |
| - name: Size diff | |
| run: diff '${{runner.temp}}/base-sizes' '${{runner.temp}}/merge-sizes' || exit 0 |