flake: add treefmt-nix (#562) #2
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| name: Check formatting with treefmt | |
| on: | |
| [push, pull_request] | |
| jobs: | |
| treefmt: | |
| runs-on: ubuntu-latest | |
| steps: | |
| - uses: cachix/install-nix-action@v22 | |
| - uses: actions/checkout@v3 | |
| - id: files | |
| uses: tj-actions/changed-files@v44 | |
| - name: Run treefmt | |
| run: nix fmt | |
| - name: Check diff | |
| run: | | |
| unformatted_touched=() | |
| unformatted_untouched=() | |
| while IFS= read -r unformatted_file; do | |
| matched= | |
| for changed_file in ${{ steps.files.outputs.all }}; do | |
| if [[ "$changed_file" == "$unformatted_file" ]]; then | |
| unformatted_touched+=("$unformatted_file") | |
| matched=1 | |
| break | |
| fi | |
| done | |
| if [[ -z "$matched" ]]; then | |
| unformatted_untouched+=("$unformatted_file") | |
| fi | |
| done <<< "$(git diff --name-only)" | |
| if (( ${#unformatted_untouched[@]} )); then | |
| echo "These files are not formatted, but out of scope of this PR:" | |
| printf '%s\n' "${unformatted_untouched[@]}" | |
| fi | |
| if (( ${#unformatted_touched[@]} )); then | |
| echo "These files are created/edited but not formatted:" | |
| printf '%s\n' "${unformatted_touched[@]}" | |
| exit 1 | |
| fi |