Fix 'python3': No such file or directory failure

[henrywang]

Fix 'python3': No such file or directory failure

[gemini-code-assist]

Summary of Changes

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This pull request addresses a critical build failure in the Debian development container by ensuring that the python3 executable is present during the tools build stage. The change temporarily installs Python, allowing necessary scripts to run, and then uninstalls it to prevent unnecessary bloat in the final image. This improves the reliability and consistency of the build environment.

Highlights

• Build Fix: Resolved a 'python3: No such file or directory' error during the build process within the Debian container environment.
• Temporary Python Installation: Implemented a temporary installation of python3 specifically for the tools build stage, ensuring it's available when fetch-tools.py is executed, and then promptly removed to maintain a lean image.
• Dockerfile Syntax Consistency: Standardized the FROM ... as ... syntax to FROM ... AS ... across multiple build stages in the Containerfile.debian.

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Changelog

• devenv/Containerfile.debian
  • Updated Dockerfile syntax for build stages from as to AS for consistency.
  • Introduced a temporary installation and subsequent removal of python3 in the tools build stage to resolve a 'python3: No such file or directory' error.

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[gemini-code-assist]

Code Review

This pull request fixes a 'python3: No such file or directory' error by installing Python before running a Python script in the Dockerfile. The change correctly installs and then removes Python within a single RUN layer to avoid bloating the image. I've suggested a small improvement to further optimize the Docker layer by cleaning up apt caches and avoiding recommended packages, which is a common best practice.

[gemini-code-assist]

To improve Docker layer hygiene and minimize layer size, it's best practice to use --no-install-recommends with apt install and to clean up apt metadata within the same RUN instruction. This prevents unnecessary packages from being installed and removes cached files that are not needed in the image layer.

RUN apt -y install --no-install-recommends python3 && /run/src/fetch-tools.py && apt -y purge python3 && apt -y autoremove && apt clean && rm -rf /var/lib/apt/lists/*