[WIP] Fix docker build cache

[wzshiming]

Fixed #23588

Purpose

Test Plan

Test Result

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[gemini-code-assist]

Code Review

This pull request aims to improve Docker build caching by excluding the .git directory from the COPY command and making the wheel build step conditional. While the change to COPY is correct, the logic for the conditional wheel build is flawed. It introduces a critical bug where no wheel is built by default, and it contains redundant code. I've provided a suggestion to fix the logic and remove the redundancy.

[Copilot]

Pull request overview

This PR aims to fix Docker build cache issues by excluding the .git directory from the COPY command and introducing a USE_GIT_VERSION build argument to conditionally control version generation behavior.

Key changes:

• Excludes .git directory from being copied into the build context to prevent cache invalidation
• Introduces USE_GIT_VERSION argument to control whether git-derived or static versioning is used
• Adds docker/ to .dockerignore to reduce build context size

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

File	Description
docker/Dockerfile	Adds --exclude=.git to COPY command and introduces conditional logic for wheel building based on USE_GIT_VERSION flag
.dockerignore	Excludes docker/ directory from build context

Critical Issue Found: The conditional logic for the two RUN blocks has a bug where both conditions check for the same case (USE_GIT_VERSION != "0"), meaning the fallback case is never executed.

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