Extract digest hash from Docker image inspection output - #594
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docker inspect RepoDigests returns the full repo-plus-digest reference, but the app Dockerfile concatenates the repository name with this value again in its FROM line, producing an invalid double-prefixed image reference and failing the web app image build. Strip the repository prefix so only the sha256 digest is passed through, matching what the FROM line and OCI base-digest label expect.
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Pull Request
📖 Description
Update the release workflow to extract only the digest hash portion from Docker image inspection output. The
docker inspectcommand returns the full image reference including the registry (e.g.,mcr.microsoft.com/dotnet/aspnet@sha256:...), but only the digest hash portion (e.g.,sha256:...) is needed for downstream use.This change uses bash parameter expansion (
${variable#*@}) to remove everything up to and including the@symbol, leaving only the digest hash.🎫 Issues
N/A
👩💻 Reviewer Notes
This is a minor workflow fix that ensures the output variables contain only the digest hash rather than the full image reference. The change applies the same extraction logic to both the runtime and nginx digest outputs for consistency.
📑 Test Plan
N/A — This is a workflow configuration change that will be validated by the automated release workflow execution.
✅ Checklist
General