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fix(gitlab-mirror): handle empty source refs #842

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Merged
ReenigneArcher merged 1 commit into from
Aug 12, 2026
Merged

fix(gitlab-mirror): handle empty source refs #842

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63 changes: 37 additions & 26 deletions .github/workflows/__mirror-github-to-gitlab.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -343,9 +343,7 @@ jobs:
if [[ "${project_created}" == "true" ]]; then
project_empty=true
else
project_empty="$(
jq -r '(.empty_repo == true) or (.default_branch == null)' "${response_file}"
)"
project_empty="$(jq -r '.empty_repo == true' "${response_file}")"
fi

# Make a private source private before changing metadata or pushing any Git data.
Expand Down Expand Up @@ -489,30 +487,43 @@ jobs:
fi
fi

if [[ "${gitlab_incremental_seed}" == "true" ]]; then
mapfile -t seed_refs < <(
git -C "${mirror_dir}" for-each-ref --format='%(refname)' refs/heads/ refs/tags/
)
echo "Seeding ${#seed_refs[@]} branches and tags in separate pushes..."
for seed_ref in "${seed_refs[@]}"; do
echo "Seeding ${seed_ref}..."
if ! git \
-C "${mirror_dir}" \
-c core.sshCommand="${gitlab_ssh_command}" \
push --progress "${target_clone_url}" "+${seed_ref}:${seed_ref}"; then
echo "::error title=Mirror failed: ${source_name}::Unable to seed ${seed_ref} on GitLab."
exit 1
fi
done
fi
mapfile -t mirror_refs < <(
git -C "${mirror_dir}" for-each-ref --format='%(refname)'
)
if ((${#mirror_refs[@]} == 0)); then
echo "The GitHub repository has no refs to mirror."
if [[ "${project_empty}" != "true" ]]; then
echo "::error title=Mirror failed: ${source_name}::The GitHub repository is empty, but" \
"the GitLab repository is not. Refusing to leave stale GitLab refs."
exit 1
fi
echo "The GitLab repository is also empty; no Git push is required."
else
if [[ "${gitlab_incremental_seed}" == "true" ]]; then
mapfile -t seed_refs < <(
git -C "${mirror_dir}" for-each-ref --format='%(refname)' refs/heads/ refs/tags/
)
echo "Seeding ${#seed_refs[@]} branches and tags in separate pushes..."
for seed_ref in "${seed_refs[@]}"; do
echo "Seeding ${seed_ref}..."
if ! git \
-C "${mirror_dir}" \
-c core.sshCommand="${gitlab_ssh_command}" \
push --progress "${target_clone_url}" "+${seed_ref}:${seed_ref}"; then
echo "::error title=Mirror failed: ${source_name}::Unable to seed ${seed_ref} on GitLab."
exit 1
fi
done
fi

echo "Pushing the mirror to ${target_clone_url}..."
if ! git \
-C "${mirror_dir}" \
-c core.sshCommand="${gitlab_ssh_command}" \
push --mirror --progress "${target_clone_url}"; then
echo "::error title=Mirror failed: ${source_name}::Unable to push the GitLab mirror."
exit 1
echo "Pushing the mirror to ${target_clone_url}..."
if ! git \
-C "${mirror_dir}" \
-c core.sshCommand="${gitlab_ssh_command}" \
push --mirror --progress "${target_clone_url}"; then
echo "::error title=Mirror failed: ${source_name}::Unable to push the GitLab mirror."
exit 1
fi
fi
rm -rf "${mirror_dir}"
echo "Completed mirror for ${source_name}."
Expand Down