Clean up duplicated micropipenv installations in pytorch+llmcompressor images

[coderabbitai]

Problem Description

The pytorch+llmcompressor Docker images contain redundant micropipenv installations that create unnecessary build overhead and potential version inconsistencies.

Affected Files

• runtimes/pytorch+llmcompressor/ubi9-python-3.11/Dockerfile.cuda
• jupyter/pytorch+llmcompressor/ubi9-python-3.11/Dockerfile.cuda

Current Problematic Pattern

Each affected Dockerfile installs micropipenv twice:

1. Early installation (for Pipfile.lock deployment):

   # Install micropipenv to deploy packages from Pipfile.lock
   RUN pip install --no-cache-dir -U "micropipenv[toml]"

2. Later redundant installation (in requirements.txt block):

   # Install micropipenv and uv to deploy packages from requirements.txt begin
   RUN pip install --no-cache-dir -U "micropipenv[toml]==1.9.0" "uv==0.8.12"
   # Install micropipenv and uv to deploy packages from requirements.txt end

Impact

• Build inefficiency: Unnecessary package download and installation time
• Version inconsistency risk: Different micropipenv versions could be installed if the early install isn't pinned
• Maintenance overhead: Duplicate installations to maintain and update

Solution Options

Option 1: Remove Early Installation (Recommended)

Remove the early micropipenv installation and rely only on the later pinned installation:

# Remove this block:
# Install micropipenv to deploy packages from Pipfile.lock
# RUN pip install --no-cache-dir -U "micropipenv[toml]==1.9.0"

# Keep only the later installation before micropipenv usage:
# Install micropipenv and uv to deploy packages from requirements.txt begin
RUN pip install --no-cache-dir -U "micropipenv[toml]==1.9.0" "uv==0.8.12"
# Install micropipenv and uv to deploy packages from requirements.txt end

# Then use micropipenv immediately after:
RUN echo "Installing softwares and packages" && \
    micropipenv install --dev && \
    ...

Option 2: Consolidate Installations

Move the micropipenv installation to just before its first usage and remove the later duplicate.

Option 3: Conditional Installation

Add logic to check if micropipenv is already installed before attempting reinstallation.

Acceptance Criteria

• Remove duplicate micropipenv installations from all pytorch+llmcompressor Dockerfiles
• Ensure micropipenv version consistency (1.9.0) across all installations
• Verify that micropipenv install --dev still works correctly
• Test image builds successfully for both affected variants
• Confirm no other image types have similar duplication patterns
• Update any related documentation if necessary

Implementation Notes

• This cleanup should be coordinated with ongoing version pinning efforts in PR opendatahub-io/notebooks#1595: chore: pin micropipenv and uv versions in Dockerfile pip install commands for reproducible builds #1998
• Consider applying similar deduplication to other image types if the pattern is found elsewhere
• Ensure the solution maintains the existing functionality for both Pipfile.lock and requirements.txt deployment

Context

• Related to PR opendatahub-io/notebooks#1595: chore: pin micropipenv and uv versions in Dockerfile pip install commands for reproducible builds #1998 (micropipenv version pinning)
• Part of ongoing efforts to improve build reproducibility and efficiency
• Identified during code review of version pinning changes

References

• PR: opendatahub-io/notebooks#1595: chore: pin micropipenv and uv versions in Dockerfile pip install commands for reproducible builds #1998
• Comment: opendatahub-io/notebooks#1595: chore: pin micropipenv and uv versions in Dockerfile pip install commands for reproducible builds #1998 (comment)