fix: only consider specified packages when stopping because of downgrading

[johanneskoester]

Summary by CodeRabbit

• Bug Fixes

  • Improved error messaging when package downgrades are detected during environment updates.
  • Enhanced logic for identifying downgraded packages to ensure accuracy.

• Chores

  • Refined internal processes for managing package dependencies without altering public interfaces.

[coderabbitai]

Walkthrough

The changes in this pull request focus on the CondaEnvProcessor class, specifically modifying the update_env method. The method's logic for identifying downgraded packages has been refined to utilize set intersection, ensuring that only packages that are both unconstrained and subject to downgrade are included. Additionally, the error message for downgrade detection has been updated to provide clearer feedback regarding environment update failures. The overall structure of the method remains unchanged, and no public interfaces or signatures have been altered.

Changes

File	Change Summary
snakedeploy/conda.py	Modified update_env method in CondaEnvProcessor to use set intersection for downgraded packages and updated the corresponding error message. Simplified SHA retrieval logic in create method of PR class.

Sequence Diagram(s)

sequenceDiagram
    participant User
    participant CondaEnvProcessor
    participant DowngradedChecker

    User->>CondaEnvProcessor: Request to update environment
    CondaEnvProcessor->>DowngradedChecker: Check for downgraded packages
    DowngradedChecker-->>CondaEnvProcessor: Return downgraded packages
    CondaEnvProcessor->>CondaEnvProcessor: Determine unconstrained packages
    CondaEnvProcessor->>CondaEnvProcessor: Compute set intersection for downgraded packages
    CondaEnvProcessor->>User: Return error if downgrades detected

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Files that changed from the base of the PR and between cc52da4 and 71c011c.

📒 Files selected for processing (1)

• snakedeploy/conda.py (4 hunks)

🚧 Files skipped from review as they are similar to previous changes (1)

• snakedeploy/conda.py

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[coderabbitai]

Actionable comments posted: 0

🧹 Outside diff range and nitpick comments (1)

snakedeploy/conda.py (1)

Line range hint 225-231: Approve changes with a minor suggestion for clarity.

The changes look good and improve the accuracy of detecting downgraded packages. The new implementation ensures that only unconstrained dependencies that would be downgraded are considered, which should reduce false positives.

Consider renaming the downgraded variable to downgraded_unconstrained_deps for clarity, as it now represents the intersection of unconstrained dependencies and those that would be downgraded. This would make the variable's purpose more explicit:

downgraded_unconstrained_deps = set(unconstrained_deps) & set(downgraded())
if downgraded_unconstrained_deps:
    msg = (
        f"Env {conda_env_path} could not be updated because the following packages "
        f"would be downgraded: {', '.join(downgraded_unconstrained_deps)}. Please consider a manual update "
        "of the environment."
    )

📜 Review details

Configuration used: CodeRabbit UI
Review profile: CHILL

📥 Commits

Files that changed from the base of the PR and between d33541a and cc52da4.

📒 Files selected for processing (1)

• snakedeploy/conda.py (1 hunks)

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📓 Path-based instructions (1)

snakedeploy/conda.py (1)

Pattern **/*.py: Do not try to improve formatting.
Do not suggest type annotations for functions that are defined inside of functions or methods.
Do not suggest type annotation of the self argument of methods.
Do not suggest type annotation of the cls argument of classmethods.
Do not suggest return type annotation if a function or method does not contain a return statement.

🔇 Additional comments (1)

snakedeploy/conda.py (1)

Line range hint 1-431: Overall assessment of changes

The changes in this file effectively address the PR objective of only considering specified packages when stopping because of downgrading. The modification to the update_env method improves the accuracy of detecting downgraded packages by considering only unconstrained dependencies. This should reduce false positives and provide clearer feedback to users when environment updates fail due to package downgrades.

The implementation is consistent with the PR objectives and the AI-generated summary. No other significant changes were made to the file, and the overall structure and logic of the CondaEnvProcessor class remain intact.