From 53c8de0a1959a744e17888df1a70e935dfef0143 Mon Sep 17 00:00:00 2001
From: twentyOne2x <contact@attn.market>
Date: Wed, 15 Jul 2026 03:51:54 +0200
Subject: [PATCH] Make Observatory staging deploy rerunnable (#155)

---
 .../workflows/gcp-observatory-read-adapter.yml    | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/.github/workflows/gcp-observatory-read-adapter.yml b/.github/workflows/gcp-observatory-read-adapter.yml
index e4c088f..95b18a4 100644
--- a/.github/workflows/gcp-observatory-read-adapter.yml
+++ b/.github/workflows/gcp-observatory-read-adapter.yml
@@ -74,12 +74,21 @@ jobs:
           set -euo pipefail
           tag="${GITHUB_SHA::12}"
           image="${REGION}-docker.pkg.dev/${PROJECT_ID}/${REPOSITORY}/${IMAGE_NAME}:${tag}"
-          docker build -f Dockerfile.observatory-read-adapter -t "${image}" .
+          digest="$(gcloud artifacts docker images describe "${image}" \
+            --project="${PROJECT_ID}" \
+            --format='value(image_summary.digest)' 2>/dev/null || true)"
+          if [[ -n "${digest}" ]]; then
+            docker pull "${image}"
+          else
+            docker build -f Dockerfile.observatory-read-adapter -t "${image}" .
+          fi
           docker run --rm --env PYTHONPYCACHEPREFIX=/tmp/pycache \
             "${image}" python -m compileall -q /app/observatory_read_adapter
           docker run --rm "${image}" python -c 'import observatory_read_adapter; print("adapter-import-ok")'
-          docker push "${image}" | tee docker-push.log
-          digest="$(awk '/digest: sha256:/ {print $3}' docker-push.log | tail -1)"
+          if [[ -z "${digest}" ]]; then
+            docker push "${image}" | tee docker-push.log
+            digest="$(awk '/digest: sha256:/ {print $3}' docker-push.log | tail -1)"
+          fi
           test -n "${digest}"
           image_ref="${image}@${digest}"
           printf 'image_ref=%s\n' "${image_ref}" >> "${GITHUB_OUTPUT}"