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fix: cosign Helm chart signing — add GHCR auth and sign by digest #37

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Merged
miguelgila merged 1 commit into from
Mar 16, 2026
Merged

fix: cosign Helm chart signing — add GHCR auth and sign by digest #37

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19 changes: 15 additions & 4 deletions .github/workflows/release.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -200,11 +200,18 @@ jobs:
- name: Install Helm
uses: azure/setup-helm@v4

- name: Login to GHCR OCI registry
- name: Login to GHCR OCI registry (Helm)
run: |
echo "${{ secrets.GITHUB_TOKEN }}" | \
helm registry login ghcr.io -u "${{ github.actor }}" --password-stdin

- name: Login to GHCR (cosign/Docker credentials)
uses: docker/login-action@v3
with:
registry: ghcr.io
username: ${{ github.actor }}
password: ${{ secrets.GITHUB_TOKEN }}

- name: Extract version
id: version
run: |
Expand All @@ -215,17 +222,21 @@ jobs:
run: helm package deploy/helm/reaper --destination .

- name: Push to OCI registry
id: helm-push
run: |
helm push "reaper-${{ steps.version.outputs.version }}.tgz" \
oci://ghcr.io/${{ github.repository_owner }}/charts
OUTPUT=$(helm push "reaper-${{ steps.version.outputs.version }}.tgz" \
oci://ghcr.io/${{ github.repository_owner }}/charts 2>&1)
echo "$OUTPUT"
DIGEST=$(echo "$OUTPUT" | grep -oP 'Digest: \K\S+')
echo "digest=$DIGEST" >> "$GITHUB_OUTPUT"

- name: Install cosign
uses: sigstore/cosign-installer@v3

- name: Sign chart with cosign (keyless)
run: |
cosign sign --yes \
ghcr.io/${{ github.repository_owner }}/charts/reaper:${{ steps.version.outputs.version }}
ghcr.io/${{ github.repository_owner }}/charts/reaper@${{ steps.helm-push.outputs.digest }}

release:
name: Create Release
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