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workflows/check-by-name: Better error when base branch also fails

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Previously, even if the check also failed on the base branch, it looked
like the PR introduced the failure.

We can easily have a better error message for such cases.

Meanwhile this also paves the road for something like
https://github.com/NixOS/nixpkgs/issues/256788
This commit is contained in:
Silvan Mosberger 2023-09-28 01:20:16 +02:00
parent 5bf3c4393c
commit 0dcdf60c38
1 changed files with 90 additions and 1 deletions
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91
.github/workflows/check-by-name.yml vendored
View file

@ -21,6 +21,16 @@ jobs:
with:
# pull_request_target checks out the base branch by default
ref: refs/pull/${{ github.event.pull_request.number }}/merge
# Fetches the merge commit and its parents
fetch-depth: 2
- name: Determining PR git hashes
run: |
echo "mergedSha=$(git rev-parse HEAD)" >> "$GITHUB_ENV"
# For pull_request_target this is the same as $GITHUB_SHA
echo "baseSha=$(git rev-parse HEAD^1)" >> "$GITHUB_ENV"
echo "headSha=$(git rev-parse HEAD^2)" >> "$GITHUB_ENV"
- uses: cachix/install-nix-action@v23
- name: Determining channel to use for dependencies
run: |
@ -51,4 +61,83 @@ jobs:
# Passing --max-jobs 0 makes sure that we won't build anything
nix-build "$nixpkgs" -A tests.nixpkgs-check-by-name --max-jobs 0
- name: Running nixpkgs-check-by-name
run: result/bin/nixpkgs-check-by-name .
run: |
echo "Checking whether the check succeeds on the base branch $GITHUB_BASE_REF"
git checkout -q "$baseSha"
if baseOutput=$(result/bin/nixpkgs-check-by-name . 2>&1); then
baseSuccess=1
else
baseSuccess=
fi
printf "%s\n" "$baseOutput"
echo "Checking whether the check would succeed after merging this pull request"
git checkout -q "$mergedSha"
if mergedOutput=$(result/bin/nixpkgs-check-by-name . 2>&1); then
mergedSuccess=1
exitCode=0
else
mergedSuccess=
exitCode=1
fi
printf "%s\n" "$mergedOutput"
resultToEmoji() {
if [[ -n "$1" ]]; then
echo ":heavy_check_mark:"
else
echo ":x:"
fi
}
# Print a markdown summary in GitHub actions
{
echo "| Nixpkgs version | Check result |"
echo "| --- | --- |"
echo "| Latest base commit | $(resultToEmoji "$baseSuccess") |"
echo "| After merging this PR | $(resultToEmoji "$mergedSuccess") |"
echo ""
if [[ -n "$baseSuccess" ]]; then
if [[ -n "$mergedSuccess" ]]; then
echo "The check succeeds on both the base branch and after merging this PR"
else
echo "The check succeeds on the base branch, but would fail after merging this PR:"
echo "\`\`\`"
echo "$mergedOutput"
echo "\`\`\`"
echo ""
fi
else
if [[ -n "$mergedSuccess" ]]; then
echo "The check fails on the base branch, but this PR fixes it, nicely done!"
else
echo "The check fails on both the base branch and after merging this PR, unknown if only this PRs changes would satisfy the check, the base branch needs to be fixed first."
echo ""
echo "Failure on the base branch:"
echo "\`\`\`"
echo "$baseOutput"
echo "\`\`\`"
echo ""
echo "Failure after merging this PR:"
echo "\`\`\`"
echo "$mergedOutput"
echo "\`\`\`"
echo ""
fi
fi
echo "### Details"
echo "- nixpkgs-check-by-name tool:"
echo " - Channel: $channel"
echo " - Nixpkgs commit: [$rev](https://github.com/${GITHUB_REPOSITORY}/commit/$rev)"
echo " - Store path: \`$(realpath result)\`"
echo "- Tested Nixpkgs:"
echo " - Base branch $GITHUB_BASE_REF"
echo " - Latest base branch commit: [$baseSha](https://github.com/${GITHUB_REPOSITORY}/commit/$baseSha)"
echo " - Latest PR commit: [$headSha](https://github.com/${GITHUB_REPOSITORY}/commit/$headSha)"
echo " - Merge commit: [$mergedSha](https://github.com/${GITHUB_REPOSITORY}/commit/$mergedSha)"
} >> "$GITHUB_STEP_SUMMARY"
exit "$exitCode"