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Remove git executable from Dockerfiles #142

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Remove git executable from Dockerfiles #142

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ryan-gang
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@ryan-gang ryan-gang commented Apr 21, 2025

Eliminate the git executable from Dockerfiles to prevent test solutions from using it.

Summary by CodeRabbit

  • Chores
    • Removed the Git executable from Go, Python, and Rust environment images to restrict access to Git within containers.

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linear bot commented Apr 21, 2025

@ryan-gang ryan-gang self-assigned this Apr 21, 2025
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coderabbitai bot commented Apr 21, 2025

Walkthrough

The changes update Dockerfiles for Go, Python, and Rust environments to ensure the git executable is not present in the final container images. For Go and Python, the Dockerfiles now explicitly uninstall the git package using the appropriate package manager commands (apk del git), while for Rust, git is removed using apt-get remove -y git. These modifications are intended to prevent test solutions from accessing the git command during execution. No other build steps or environment configurations are altered.

Changes

File(s) Change Summary
dockerfiles/go-1.24.Dockerfile, dockerfiles/python-3.13.Dockerfile Replaced installation of git with explicit removal (apk del git) to ensure git is absent.
dockerfiles/rust-1.85.Dockerfile Added step to remove git using apt-get remove -y git after build steps.

Poem

A Docker hop, a Docker skip,
Out goes git—no more to grip!
With Go and Python, Rust in tow,
The code runs clean, git must go.
Containers light, solutions neat,
No git commands for tests to cheat!
🐇✨

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@ryan-gang ryan-gang requested a review from andy1li April 21, 2025 06:55
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Actionable comments posted: 0

🧹 Nitpick comments (3)
dockerfiles/python-3.13.Dockerfile (1)

3-4: Handle absence of git and clean up cache to slim the image.

The apk del git command will break the build if git isn’t installed in the base image. Additionally, removing the APK cache afterwards can significantly reduce the final image size.

Apply a guarded removal and cache cleanup:

- RUN apk del git
+ RUN apk del git || true && \
+     rm -rf /var/cache/apk/*
dockerfiles/rust-1.85.Dockerfile (1)

15-16: Clean up apt caches after removing git to reduce image size.

apt-get remove -y git uninstalls the package but leaves behind metadata and cached lists. Purging configuration and clearing /var/lib/apt/lists/ will slim the final layer.

Apply this diff to both purge and clean caches:

- RUN apt-get remove -y git
+ RUN apt-get remove -y git && \
+     apt-get purge -y --auto-remove && \
+     rm -rf /var/lib/apt/lists/*
dockerfiles/go-1.24.Dockerfile (1)

18-19: Guard git removal and clear APK cache for a smaller image.

As with the Python environment, unconditionally running apk del git may fail if git isn’t present. Clearing the APK cache after removal also helps reduce image footprint.

- RUN apk del git
+ RUN apk del git || true && \
+     rm -rf /var/cache/apk/*
📜 Review details

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Review profile: CHILL
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📥 Commits

Reviewing files that changed from the base of the PR and between f0495db and 9380eb8.

📒 Files selected for processing (3)
  • dockerfiles/go-1.24.Dockerfile (1 hunks)
  • dockerfiles/python-3.13.Dockerfile (1 hunks)
  • dockerfiles/rust-1.85.Dockerfile (1 hunks)
⏰ Context from checks skipped due to timeout of 90000ms (7)
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@rohitpaulk
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@ryan-gang this won't work, we need Git installed for the test-runner to work (and I think we'll end up installing it again anyway: https://github.com/codecrafters-io/core/blob/bb27a7597f91704b4dc23d3fb6daafe5d5b91afb/app/lib/buildpack_dockerfile_processor.rb#L42).

Let's do a tester-level patch instead, and just move the git executable to tmp or so

@rohitpaulk
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@ryan-gang It's also a not-so-robust solution, how would we ensure that every new language added follows this pattern? Would've expected something like a CI check

@ryan-gang
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Yep, I was aware of the dockerfile_processor thing.
I wanted to check how removing the git executable would affect production tests.
This was more exploratory than a final PR.

@ryan-gang ryan-gang closed this Apr 21, 2025
@ryan-gang ryan-gang deleted the CC-1716 branch April 21, 2025 19:31
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3 participants