rust-1.83: vump epoch to build with latest libgit2

[ajayk]

No description provided.

[octo-sts]

⚠️ EXPERIMENTAL

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e.g. /ai-verify partially helpful but I also added bash to the build environment

Gen AI suggestions to solve the build error:

• Detected Error: "solving 'so:libgit2.so.1.8' constraint: libgit2-1.8.0-r0.apk disqualified because libgit2-1.9.0-r0.apk already provides cmd:git2"

• Error Category: Dependency

• Failure Point: Package resolution during build environment setup

• Root Cause Analysis: There's a version mismatch between the required libgit2 shared library version (1.8) needed by rust-1.82 and the available libgit2 package (1.9.0) in the repository.

• Suggested Fix:

1. Add a specific version constraint for libgit2-dev in the environment section:

environment:
  contents:
    packages:
      - libgit2-dev~1.8

Instead of just libgit2-dev

• Explanation: This fix explicitly requests libgit2 version 1.8.x, which matches the shared library requirement of rust-1.82. The tilde (~) operator ensures we get the highest 1.8.x version available while preventing upgrades to 1.9.x.

• Additional Notes:

• This is a common issue when system libraries get updated but older packages still require previous versions
• The error occurs because rust-1.82 was built against libgit2 1.8.x and requires that specific ABI version
• Alternative approach could be to rebuild rust-1.82 against libgit2 1.9, but that would require more extensive testing

• References:

• https://reproducible-builds.org/docs/version-information/
• https://github.com/rust-lang/rust/blob/master/src/doc/rustc/platform-support.md