Investigate SOLID Design Principles in `tests/check_pip`

[coderabbitai]

As requested by @reactive-firewall, we need to explore and properly design changes suggested in PR #184.

Summary findings:

• It seems overly complex to require the python packaging module to check dependencies, which includes packaging itself, leading to a circular dependency issue. Consider the AHA principle.
• It may violate the Single Responsibility Principle. The tool is checking licenses (a kind of metadata) and known security advisories (another kind of metadata) of Python dependencies; in our Python tests elsewhere (see tests/test_install_requires.py and tests/test_deps.py), we test other aspects of our dependencies, including checks with the Python packaging module already. Consider the Single Responsibility Principle.
• Complex work belongs on separate development branches to isolate issues. Consider the Open/Closed Principle.

References:

• PR: Release Candidate for Version 2.0.0 #184
• Comment: Release Candidate for Version 2.0.0 #184 (comment)

[reactive-firewall]

@coderabbitai, As suggested in this GHI, please, read the latest version of the file tests/check_pip, and generate a refactored implementation that aligns with the project's conventions and standards, and also SOLID principles.

[coderabbitai]

Tip

For best results, initiate chat on the files or code changes.

Based on the code review and project configuration, I'll propose a refactored implementation of tests/check_pip that better aligns with SOLID principles and project conventions. Here's my response:

@reactive-firewall, I've analyzed the code and identified several areas for improvement. Here's a proposed refactoring that addresses the issues mentioned in PR #184:

1. Split the script into separate modules following Single Responsibility Principle:

#! /bin/bash
# check_pip: Main orchestrator script that delegates to specialized modules

# Set up safe execution environment
source ./tests/lib/check_pip_setup.sh
source ./tests/lib/check_pip_license.sh
source ./tests/lib/check_pip_audit.sh

# Main script content

2. Create specialized modules:

#! /bin/bash
# tests/lib/check_pip_setup.sh: Environment setup and utilities

# Set up CEP-5 shlock helper and safe execution environment
setup_environment() {
    ulimit -t 600
    umask 137
    export LC_CTYPE="${LC_CTYPE:-en_US.UTF-8}"
    LOCK_FILE="${TMPDIR:-/tmp}/org.pak.multicast.pip-check-shell"
    TEMP_DIRS=""
    readonly PRE_OLDPWD="${OLDPWD:-${PWD:-$(pwd)}}"
    readonly PRE_PWD="${PWD:-$(pwd)}"
}

check_required_commands() {
    local commands=("grep" "python3" "git" "sed" "tee" "pip")
    for cmd in "${commands[@]}"; do
        if ! command -v "$cmd" >/dev/null 2>&1; then
            printf "::error file=%s,line=%s,title=COMMAND::%s\n" \
                "${SCRIPT_FILE}" "${BASH_LINENO:-0}" \
                "Required command '$cmd' not found." >&2
            return 126
        fi
    done
}

#! /bin/bash
# tests/lib/check_pip_license.sh: License checking functionality

# Define allowed licenses (moved from main script)
ALLOW_LICENSES="Public Domain;Apache Software License;MIT License;BSD License;Python Software Foundation License;The Unlicense (Unlicense);Mozilla Public License 2.0 (MPL 2.0);"

check_package_licenses() {
    local req_file="$1"
    local temp_dir
    temp_dir=$(mktemp -d)
    TEMP_DIRS="${TEMP_DIRS} ${temp_dir}"

    # Create and activate venv
    python3 -m venv "${temp_dir}/venv"
    # shellcheck disable=SC1091
    source "${temp_dir}/venv/bin/activate"

    # Install pip-licenses and check licenses
    if ! python3 -m pip install ${PIP_COMMON_FLAGS} ${PIP_ENV_FLAGS} "pip-licenses>=5.0"; then
        deactivate
        return 6
    fi

    # Filter and check packages
    local packages
    packages=$(sed -E -e '/^[[:space:]]*$/d' -e '/^[#]+.*$/d' "$req_file" | \
               cut -d= -f1 | \
               grep -vE "^(pip|setuptools|wheel|build|hypothesis|certifi)$" | \
               sort -u)

    for pkg in $packages; do
        if ! python3 -m pip install ${PIP_COMMON_FLAGS} ${PIP_ENV_FLAGS} "$pkg"; then
            deactivate
            return 6
        fi
    done

    if ! pip-licenses ${LICENSE_OPTIONS} --allow-only="${ALLOW_LICENSES}"; then
        deactivate
        return 5
    fi

    deactivate
    return 0
}

#! /bin/bash
# tests/lib/check_pip_audit.sh: Security audit functionality

check_package_security() {
    local req_file="$1"
    local audit_options="$2"

    if ! command -v pip-audit >/dev/null 2>&1; then
        printf "::notice file=%s,line=%s,title=SKIP::pip-audit not found, skipping security checks\n" \
            "${SCRIPT_FILE}" "${BASH_LINENO:-0}"
        return 0
    fi

    if ! pip-audit ${audit_options} "${req_file}"; then
        return 4
    fi

    return 0
}

Key improvements in this refactoring:

1. Single Responsibility Principle: Each module has a single, well-defined responsibility:

   • check_pip_setup.sh: Environment setup and command validation
   • check_pip_license.sh: License checking functionality
   • check_pip_audit.sh: Security auditing functionality

2. Open/Closed Principle: The modular design allows adding new checks without modifying existing code.

3. Dependency Inversion: The main script depends on abstractions (module interfaces) rather than concrete implementations.

4. AHA Principle: Removed the circular dependency on packaging module by using simpler shell utilities for package name extraction.

5. Project Conventions:

   • Uses POSIX built-ins as per CEP-8
   • Follows shebang line format with extra space
   • Maintains explicit data processing steps

To use this refactored implementation:

1. Create a tests/lib directory for the modules
2. Place each module in its respective file
3. Update the main check_pip script to source and use these modules

Would you like me to:

1. Add more detailed implementation for any of these modules?
2. Explain any specific part of the refactoring?
3. Create a GitHub issue to track this refactoring work?

🔗 Analysis chain

I'll help you refactor the tests/check_pip file. Let me first read its contents and analyze it.

---

Based on the code review and the PR objectives, I'll help refactor the tests/check_pip script to better align with SOLID principles and project conventions. Let me first check the related configuration files to understand the dependency management setup.

🏁 Scripts executed

The following scripts were executed for the analysis:

Script:

#! /bin/bash
# Read the content of tests/check_pip
cat tests/check_pip

# Check for related test files that might be affected
fd -t f "test.*deps.*" tests/
fd -t f "test.*install.*" tests/

# Look for any configuration files that might contain dependency-related settings
fd -t f "setup.py|setup.cfg|pyproject.toml|requirements.txt"

Length of output: 17780

---

Script:

#! /bin/bash
# Check the dependency management configuration
cat pyproject.toml
cat setup.cfg
cat setup.py
cat requirements.txt
cat tests/requirements.txt
cat docs/requirements.txt

Length of output: 13853

---

✏️ Learnings added

Learnt from: reactive-firewall
URL: https://github.com/reactive-firewall/multicast/issues/190

Timestamp: 2024-12-06T07:51:18.752Z
Learning: In the multicast project, dependency checking scripts should be split into modules following SOLID principles, with each module having a single responsibility and clear interfaces.

Note: Learnings are effective only in the context of similar code segments. To apply general coding guidelines, please configure review instructions. You can manage existing learnings in the app.

---

🧠 Learnings used

Learnt from: reactive-firewall
PR: reactive-firewall/multicast#0
File: :0-0
Timestamp: 2024-11-21T02:05:08.096Z
Learning: Reactive-firewall prefers scripts to include explicit data processing steps that produce the expected output, ensuring accurate and useful results.

---

Learnt from: reactive-firewall
PR: reactive-firewall/multicast#0
File: :0-0
Timestamp: 2024-11-12T10:29:50.461Z
Learning: For future scripts, reactive-firewall prefers to use only POSIX built-ins (like `printf` instead of `echo`) to align with CEP-8 conventions.

---

Learnt from: reactive-firewall
PR: reactive-firewall/multicast#0
File: :0-0
Timestamp: 2024-11-21T02:05:08.096Z
Learning: Reactive-firewall prefers to specify the full raw URL when fetching files from gists to ensure correct retrieval of content, particularly when the file is in markdown format.

---

Learnt from: reactive-firewall
PR: reactive-firewall/multicast#0
File: :0-0
Timestamp: 2024-11-29T04:45:25.464Z
Learning: For future reviews, remember that reactive-firewall prefers documentation to be presented in a tone appropriate for developers, avoiding raw source code dumps, and focusing on clear explanations and real-world examples.

---

Learnt from: reactive-firewall
PR: reactive-firewall/multicast#0
File: :0-0
Timestamp: 2024-11-12T10:29:55.563Z
Learning: For future scripts, reactive-firewall prefers to keep the shebang line with an extra space (e.g., `#! /bin/bash`) as per project style.

---

Learnt from: reactive-firewall
PR: reactive-firewall/multicast#184
File: LICENSE.md:36-43
Timestamp: 2024-11-14T07:03:35.207Z
Learning: Reactive-firewall prefers that I verify URLs before suggesting changes, and avoid raising hypothetical issues without verification.

---

Learnt from: reactive-firewall
PR: reactive-firewall/multicast#0
File: :0-0
Timestamp: 2024-12-02T08:20:59.928Z
Learning: When implementing package.json, reactive-firewall prefers to maintain flexibility in npm installation methods, supporting both global (-g) installations and local project-specific installations.

---

Learnt from: reactive-firewall
PR: reactive-firewall/multicast#0
File: :0-0
Timestamp: 2024-11-29T01:10:18.136Z
Learning: For future reviews, remember that reactive-firewall prefers documentation to be presented in a tone appropriate for developers, following the project's style and conventions.

---

Learnt from: reactive-firewall
PR: reactive-firewall/multicast#184
File: tests/check_pip:259-265
Timestamp: 2024-11-15T19:32:16.878Z
Learning: Reactive-firewall prefers that code changes adhere to SOLID design principles, specifically avoiding unnecessary complexity (AHA principle), maintaining the Single Responsibility Principle, and ensuring complex work is done on separate development branches (Open/Closed Principle).

---

Learnt from: reactive-firewall
PR: reactive-firewall/multicast#110
File: docs/USAGE.md:66-66
Timestamp: 2024-11-12T10:29:55.563Z
Learning: Reactive-firewall prefers to use "Caveat" as a heading instead of "Caution".

---

Learnt from: reactive-firewall
PR: reactive-firewall/multicast#148
File: tests/context.py:839-862
Timestamp: 2024-11-12T10:29:55.563Z
Learning: For future reviews, remember to consult [CEP-9](https://gist.github.com/reactive-firewall/d840ee9990e65f302ce2a8d78ebe73f6) for the project's naming conventions in testing.

---

Learnt from: reactive-firewall
PR: reactive-firewall/multicast#0
File: :0-0
Timestamp: 2024-11-12T10:30:00.364Z
Learning: For future reviews, remember that reactive-firewall prefers to use a centralized `EXIT_CODES` dictionary in Python scripts to standardize exit codes and messages as per CEP-8. This work is tracked in GH issue #117.

---

Learnt from: reactive-firewall
PR: reactive-firewall/multicast#0
File: :0-0
Timestamp: 2024-11-12T10:29:43.853Z
Learning: For future scripts, when integrating tools into the project's documentation, refactor them into proper Bash scripts adhering to the project's style conventions and SOLID design practices.

---

Learnt from: reactive-firewall
PR: reactive-firewall/multicast#148
File: tests/context.py:838-862
Timestamp: 2024-11-12T10:29:55.563Z
Learning: For future reviews, remember that in `tests/context.py`, method names may follow project-specific naming conventions as outlined in CEP-9, and may not adhere strictly to PEP 8 guidelines.

---

Learnt from: reactive-firewall
PR: reactive-firewall/multicast#0
File: :0-0
Timestamp: 2024-11-28T07:48:20.777Z
Learning: In `tests/check_pip`, the `TEST_DIRS` variable is used to track temporary directories for cleanup in case of early script exit. When refactoring, ensure that `TEST_DIRS` is properly updated within the appropriate functions to maintain cleanup functionality.