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workflows/pr: Special-case adding a single repository #912

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40 changes: 39 additions & 1 deletion .github/workflows/pr.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -11,9 +11,47 @@ jobs:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
with:
fetch-depth: 2

- uses: cachix/install-nix-action@17fe5fb4a23ad6cbbe47d6b3f359611ad276644c # v31
with:
nix_path: nixpkgs=channel:nixos-unstable
extra_nix_config: |
experimental-features = nix-command flakes
- run: ./ci/test.sh

- name: Find added repos
id: detect-repo
run: |
set -eux

if [ -n "${{ github.base_ref }}" ]; then
BASE_REF="origin/${{ github.base_ref }}"
else
BASE_REF="HEAD^"
fi

changed_files=$(git diff --name-only "$BASE_REF" HEAD)
if [ "$changed_files" != "repos.json" ]; then
echo "single_repo_added=false" >> "$GITHUB_OUTPUT"
exit 0
fi

old=$(git show "$BASE_REF:repos.json" | jq -r '.repos | keys[]')
new=$(jq -r '.repos | keys[]' repos.json)
added_repos=$(comm -13 <(echo "$old" | sort) <(echo "$new" | sort))
count=$(echo "$added_repos" | wc -l)
if [ "$count" -eq 1 ]; then
echo "single_repo_added=true" >> "$GITHUB_OUTPUT"
echo "repo=$(echo "$added_repos")" >> "$GITHUB_OUTPUT"
else
echo "single_repo_added=false" >> "$GITHUB_OUTPUT"
fi

- name: Test (Single repo)
if: steps.detect-repo.outputs.single_repo_added == 'true'
run: ./ci/test.sh -r ${{ steps.detect-repo.outputs.repo }}

- name: Test (all repos)
if: steps.detect-repo.outputs.single_repo_added != 'true'
run: ./ci/test.sh
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