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6 changes: 5 additions & 1 deletion services/git/compare.go
Original file line number Diff line number Diff line change
Expand Up @@ -84,7 +84,11 @@ func GetCompareInfo(ctx context.Context, baseRepo, headRepo *repo_model.Reposito

// We have a common base - therefore we know that ... should work
if !fileOnly {
compareInfo.Commits, err = headGitRepo.ShowPrettyFormatLogToList(ctx, compareInfo.BaseCommitID+compareInfo.CompareSeparator+compareInfo.HeadCommitID)
// In git log/rev-list, the "..." syntax represents the symmetric difference between two references,
// which is different from the meaning of "..." in git diff (where it implies diffing from the merge base).
// For listing PR commits, we must use merge-base..head to include only the commits introduced by the head branch.
// Otherwise, commits newly pushed to the base branch would also be included, which is incorrect.
compareInfo.Commits, err = headGitRepo.ShowPrettyFormatLogToList(ctx, compareInfo.MergeBase+".."+compareInfo.HeadCommitID)
if err != nil {
return nil, fmt.Errorf("ShowPrettyFormatLogToList: %w", err)
}
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