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CI hardening: reject superseded rolling publishers #6

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CI hardening: reject superseded rolling publishers #6

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9 changes: 9 additions & 0 deletions .github/workflows/compile-observer-smoke.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -220,6 +220,9 @@ jobs:
- linux-engine-build
- windows-engine-build
if: github.event_name == 'push' && github.ref == 'refs/heads/semper/compile-observer'
concurrency:
group: semper-exp-current-publisher
cancel-in-progress: true
runs-on: ubuntu-latest
permissions:
contents: write
Expand Down Expand Up @@ -355,6 +358,12 @@ jobs:
set -euo pipefail
CANDIDATE_SHA="${{ github.event_name == 'pull_request' && github.event.pull_request.head.sha || github.sha }}"
TAG="${EXPERIMENTAL_TAG}"
BRANCH="semper/compile-observer"
CURRENT_HEAD="$(gh api "repos/${GITHUB_REPOSITORY}/git/ref/heads/${BRANCH}" --jq '.object.sha')"
if [[ "${CURRENT_HEAD}" != "${CANDIDATE_SHA}" ]]; then
echo "refusing to publish superseded candidate ${CANDIDATE_SHA}; ${BRANCH} is now ${CURRENT_HEAD}" >&2
exit 1
fi

if gh api "repos/${GITHUB_REPOSITORY}/git/ref/tags/${TAG}" >/dev/null 2>&1; then
gh api --method PATCH "repos/${GITHUB_REPOSITORY}/git/refs/tags/${TAG}" \
Expand Down