JAM SDK Dockerfile and build workflow

[skoszuta]

No description provided.

[coderabbitai]

Important

Review skipped

Auto incremental reviews are disabled on this repository.

Please check the settings in the CodeRabbit UI or the .coderabbit.yaml file in this repository. To trigger a single review, invoke the @coderabbitai review command.

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

📝 Walkthrough

Walkthrough

Introduces a GitHub Actions workflow for building and testing a Docker image (jam-sdk:latest) and a corresponding Dockerfile that sets up a Rust-based build environment with jam-pvm-build installed. The workflow runs on pushes and PRs to main, builds the image, tests it, saves it as an artifact, and retains it for one day.

Changes

Cohort / File(s)	Summary
GitHub Actions CI/CD Workflow .github/workflows/build-docker.yml	New workflow triggered on pushes and PRs to main. Runs on ubuntu-latest and executes: checkout, Docker Buildx setup, image build for jam-sdk:latest, basic validation (--help test), image save to tar.gz, and artifact upload with 1-day retention.
Dockerfile jam-sdk.Dockerfile	New multi-stage build configuration based on debian:bookworm-slim. Installs build dependencies (curl, ca-certificates, build-essential), creates non-root builder user, installs Rust toolchain via rustup with parameterized TOOLCHAIN, and installs jam-pvm-build via cargo. Sets working directory and volume mount for source code.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

• Verify Docker base image choice (debian:bookworm-slim) aligns with project requirements
• Confirm TOOLCHAIN and SDK_VERSION are appropriately parameterized and documented
• Validate that the --help test is sufficient for image validation
• Check that 1-day artifact retention policy meets CI/CD requirements
• Ensure non-root user setup (builder) follows security best practices

---

_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[coderabbitai]

Actionable comments posted: 1

🧹 Nitpick comments (2)

jam-sdk.Dockerfile (1)

21-25: Consider adding ENTRYPOINT or CMD for usability.

The SDK installation and volume setup are solid, with the pinned version ensuring reproducibility. However, the Dockerfile lacks an ENTRYPOINT or CMD, requiring users to manually specify commands when running the container. For a builder image, consider adding ENTRYPOINT ["jam-pvm-build"] or a shell wrapper to improve user experience and discoverability.

.github/workflows/build-docker.yml (1)

30-32: Basic but limited test coverage.

Testing via --help is a reasonable smoke test to verify the image builds and the entry point is callable. However, it only validates that the tool responds to --help, not its core functionality. Consider adding more comprehensive tests (e.g., building a simple JAM project) if reliability is critical.

📜 Review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Lite

📥 Commits

Reviewing files that changed from the base of the PR and between d86e3ff and 909abc2.

📒 Files selected for processing (2)

• .github/workflows/build-docker.yml (1 hunks)
• jam-sdk.Dockerfile (1 hunks)

🔇 Additional comments (6)

jam-sdk.Dockerfile (4)

1-4: Solid base image and versioning strategy.

Using debian:bookworm-slim provides a minimal, stable foundation, and pinning both the Rust toolchain (nightly-2025-05-10) and SDK version (0.1.26) via ARGs ensures reproducible builds. This approach balances flexibility with determinism.

---

13-14: Good security practice with non-root user.

Creating and switching to the non-root "builder" user before installing toolchains and running builds is a solid security approach that limits the blast radius of potential compromises.

---

7-10: The current dependencies are sufficient for the build. The Docker image builds and tests successfully in the CI/CD pipeline (as shown in build-docker.yml), which validates that curl, ca-certificates, and build-essential are adequate for installing and running jam-pvm-build. No evidence indicates that git or pkg-config are required.

---

17-18: Remove the rust-src component from the rustup installation.

The rust-src component is not required—jam-pvm-build is installed as a precompiled binary via cargo install, which does not need compiler source files. Removing -c rust-src will reduce image size without affecting functionality.

.github/workflows/build-docker.yml (2)

1-7: Appropriate trigger configuration.

The workflow triggers on both pushes and PRs targeting main, which ensures the Docker build is validated before merge and integrated after merge. This is a sound CI/CD pattern.

---

34-43: Artifact retention is conservative but appropriate.

Saving and uploading the Docker image as an artifact with 1-day retention allows easy download from CI without re-running the build. The short retention period is pragmatic for managing artifact storage costs. Be aware that Docker images are typically large (500MB+); monitor artifact storage usage if this workflow runs frequently.