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Guard release script against mismatched tags #623

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Merged
robmaceachern merged 2 commits into from
Jun 17, 2026
Merged

Guard release script against mismatched tags #623

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8c69a2a
Guard release script against mismatched tags
robmaceachern Jun 17, 2026
46f5dba
Explain release tag resolution
robmaceachern Jun 17, 2026
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11 changes: 11 additions & 0 deletions Scripts/release.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -139,6 +139,17 @@ git fetch origin --tags

target_sha=$(git rev-parse --verify "$target^{commit}")

# Resolve an existing version tag to its commit. The ^{commit} suffix peels
# annotated tags, and `|| true` lets a missing tag become an empty value under
# `set -e`.
existing_tag_sha=$(git rev-parse --verify --quiet "refs/tags/$version^{commit}" || true)

if [[ -n "$existing_tag_sha" && "$existing_tag_sha" != "$target_sha" ]]; then
echo "Error: Tag $version already exists at $existing_tag_sha, not $target_sha." >&2
echo "Choose a different version, delete or move the tag if it is wrong, or pass --target $existing_tag_sha." >&2
exit 1
fi

if gh release view "$version" > /dev/null 2>&1; then
echo "Error: A GitHub release already exists for $version." >&2
exit 1
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