Make branch name dynamic in linkcode_resolve function

[coderabbitai[bot]]

The branch name "stable" is hardcoded in the linkcode_resolve function in docs/conf.py. To enhance maintainability, consider using a variable or configuration option to specify the branch.

See PR #110: https://github.com/reactive-firewall/multicast/pull/110 and the specific comment: https://github.com/reactive-firewall/multicast/pull/110#discussion_r1764390519 for more details.

Reported by @reactive-firewall.

[reactive-firewall]

@coderabbitai,

• Please read the file 'docs/conf.py', from the HEAD of the default branch, considering it the configuration for the python sphinx tool.
• Please read up on this issue #113 and related material.
• Please generate a possible walkthrough for implementing issue #113 enhancements (focusing on what changes are actually needed to enhance the linkcode_resolve function with configuration option/function to specify the branch), complete with possible implementation of changes to code (ie, the 'how'), we'll call this the "plan draft"
• Please, then analyze the generated "plan draft" and consider project code-style, conventions, function docstrings (including doctests), and the goal of maintainability, portability, and improve upon the 'plan draft'. Present the improved plan in GH markdown format.

[coderabbitai[bot]]

[!TIP] For best results, initiate chat on the files or code changes.

@reactive-firewall,

Improved Plan for Implementing Issue #113

---

Objective: Make the branch name in the linkcode_resolve function of docs/conf.py dynamic, allowing for better maintainability and portability.

1. Define a Configuration Variable for the Branch Name

• Add at the top of docs/conf.py:

  import os
  
  # Define the branch name for linkcode_resolve
  linkcode_branch = os.environ.get("LINKCODE_BRANCH", "stable")
  """
  linkcode_branch: The name of the branch used in the GitHub links generated by the linkcode_resolve function.
  Defaults to 'stable', but can be overridden by setting the LINKCODE_BRANCH environment variable.
  """

  • This sets linkcode_branch to the value of the LINKCODE_BRANCH environment variable if it exists; otherwise, it defaults to "stable".
  • The docstring explains the purpose and usage of the variable.

2. Modify the linkcode_resolve Function to Use the Configuration Variable

• Update the linkcode_resolve function:

  def linkcode_resolve(domain, info):
    """
    Resolve the GitHub URL corresponding to the Python object.
  
    Parameters:
        domain (str): The domain of the object (e.g., 'py' for Python).
        info (dict): Information about the object.
  
    Returns:
        str or None: The GitHub URL pointing to the source code, or None if not applicable.
    """
    if domain != "py" or not info["module"]:
        return None
    filename = info["module"].replace(".", "/")
    theResult = "{prefix}/blob/{branch}/{file}.py".format(
        prefix=linkcode_url_prefix, branch=linkcode_branch, file=filename
    )
    if "/multicast.py" in theResult:
        theResult = theResult.replace("/multicast.py", "/multicast/__init__.py")
    if "/tests.py" in theResult:
        theResult = theResult.replace("/tests.py", "/tests/__init__.py")
    return theResult

  • Replaced the hardcoded "stable" with the linkcode_branch variable.
  • Added a descriptive docstring to the function.
  • Ensured code adheres to PEP 8 style guidelines.

3. Enhance Maintainability and Portability

• Leverage Environment Variables:

  • Utilizing os.environ.get() allows users to set the branch dynamically without modifying the code.
  • Promotes portability across different environments and branches.

• Default Behavior:

  • Defaulting to "stable" maintains current behavior if no environment variable is set.

4. Update Documentation Accordingly

• Document the New Configuration Option:

  • Add details in README.md or appropriate documentation files about LINKCODE_BRANCH.
  • Explain how to set the environment variable when building the documentation:

  ### Building Documentation with Custom Branch Links
  
  By default, the documentation links to the `stable` branch on GitHub. To override this, set the `LINKCODE_BRANCH` environment variable:
  
  ```bash
  export LINKCODE_BRANCH="your-branch-name"
  make html  # or your documentation build command

5. Test the Changes

• Verify Default Behavior:

  • Build the documentation without setting LINKCODE_BRANCH and ensure links point to the stable branch.

• Verify Custom Branch Behavior:

  • Set LINKCODE_BRANCH to a different branch name and rebuild.
  • Confirm that the generated links in the documentation point to the specified branch.

• Ensure No Breakages:

  • Check for any errors or warnings during the build process.
  • Validate that the links are correctly formed and accessible.

---

This improved plan aligns with the project's coding standards and emphasizes:

• Code Style and Conventions:

  • Adherence to PEP 8 guidelines.
  • Use of clear, descriptive variable names.
  • Inclusion of docstrings for functions and variables.

• Maintainability:

  • Easy configuration without code modification.
  • Default behaviors that prevent unexpected issues.

• Portability:

  • Environment variable usage allows flexibility across different systems and environments.

• Documentation:

  • Clear instructions for contributors and users.
  • Enhanced transparency of configuration options.

Please review the plan and let me know if you have any suggestions or require further adjustments.

:link: Analysis chain

:checkered_flag: Scripts executed

The following scripts were executed for the analysis: Script: ```shell #!/bin/bash # Display the contents of 'docs/conf.py' cat docs/conf.py # Fetch the details of issue #113 from the GitHub repository gh issue view 113 --repo reactive-firewall/multicast --json title,body,comments ``` Length of output: 13209

---

:brain: Learnings used

``` Learnt from: reactive-firewall PR: reactive-firewall/multicast#110 File: docs/CI.md:32-32 Timestamp: 2024-09-17T06:40:42.918Z Learning: Reactive-firewall prefers to keep the word "own" in headings when emphasizing the reader's personal test. ``` --- ``` Learnt from: reactive-firewall PR: reactive-firewall/multicast#110 File: docs/USAGE.md:66-66 Timestamp: 2024-09-17T03:38:28.677Z Learning: Reactive-firewall prefers to use "Caveat" as a heading instead of "Caution". ``` --- ``` Learnt from: reactive-firewall PR: reactive-firewall/multicast#118 File: tests/check_pip:92-197 Timestamp: 2024-09-24T01:03:10.574Z Learning: Reactive-firewall prefers defining functions before they are called in Bash scripts to avoid errors due to Bash's sequential interpretation. ``` --- ``` Learnt from: reactive-firewall PR: reactive-firewall/multicast#75 File: tests/test_basic.py:1-1 Timestamp: 2024-09-12T08:04:07.969Z Learning: When updating documentation, it's good practice to create a GitHub issue to track the task, assign it to the responsible person, and create a corresponding branch for implementing the changes. This process helps in organizing and tracking documentation improvements. ```

[reactive-firewall]

🤔 First, this plan makes sense! Let's go with this. 🔧 Second, a couple of tweaks:

• Let's use the environment variable name "DOCS_BUILD_REF" and source it in CI from the pre-existing CI variables GITHUB_SHA (for GHA) and CIRCLE_SHA1 (for CircleCI)
• the documentation example can utilize DOCS_BUILD_REF=$(${GIT:-git} rev-parse --verify HEAD) as it shows how to dynamically set the value (for example if done by a git-hook locally)
• the CI configs/scripts will need to be updated to account for the variable

---

Refs:

• https://docs.github.com/en/actions/writing-workflows/choosing-what-your-workflow-does/store-information-in-variables#default-environment-variables
• https://circleci.com/docs/variables/

[reactive-firewall]

@coderabbitai, please read up on the recent updates to this issue and relevant code, and regenerate your improved plan to bring this issue back up to date.

[coderabbitai[bot]]

[!TIP] For best results, initiate chat on the files or code changes.

@reactive-firewall,

I've reviewed the recent updates to Issue #113 and the relevant code. Here is the updated plan incorporating your suggestions:

---

Updated Plan for Implementing Issue #113

---

Objective: Make the branch reference in the linkcode_resolve function of docs/conf.py dynamic, enhancing maintainability, portability, and aligning with CI environment variables.

1. Define a Configuration Variable for the Branch Reference

• At the top of docs/conf.py, add:

  import os
  
  # Define the branch reference for linkcode_resolve
  DOCS_BUILD_REF = os.environ.get("DOCS_BUILD_REF", "stable")
  """
  DOCS_BUILD_REF: The Git reference (commit hash or branch name) used in the GitHub links generated by the linkcode_resolve function.
  Defaults to 'stable', but can be overridden by setting the DOCS_BUILD_REF environment variable.
  """

  • Sets DOCS_BUILD_REF to the value of the DOCS_BUILD_REF environment variable if it exists; otherwise, defaults to "stable".
  • The docstring explains the purpose and usage of the variable.

2. Modify the linkcode_resolve Function to Use DOCS_BUILD_REF

• Update the linkcode_resolve function:

  def linkcode_resolve(domain, info):
    """
    Resolve the GitHub URL corresponding to the Python object.
  
    Parameters:
        domain (str): The domain of the object (e.g., 'py' for Python).
        info (dict): Information about the object.
  
    Returns:
        str or None: The GitHub URL pointing to the source code, or None if not applicable.
    """
    if domain != "py" or not info["module"]:
        return None
    filename = info["module"].replace(".", "/")
    theResult = "{prefix}/blob/{ref}/{file}.py".format(
        prefix=linkcode_url_prefix, ref=DOCS_BUILD_REF, file=filename
    )
    if "/multicast.py" in theResult:
        theResult = theResult.replace("/multicast.py", "/multicast/__init__.py")
    if "/tests.py" in theResult:
        theResult = theResult.replace("/tests.py", "/tests/__init__.py")
    return theResult

  • Replaced the hardcoded "stable" with DOCS_BUILD_REF.
  • Ensured the function adheres to project conventions and includes a descriptive docstring.

3. Update CI Configurations to Set DOCS_BUILD_REF

• For GitHub Actions (GHA):

  • Modify your workflow file (e.g., .github/workflows/ci.yml):

  jobs:
    build:
      runs-on: ubuntu-latest
      steps:
        - uses: actions/checkout@v2
        - name: Set DOCS_BUILD_REF
          run: echo "DOCS_BUILD_REF=${GITHUB_SHA}" >> $GITHUB_ENV
        - name: Build Documentation
          env:
            DOCS_BUILD_REF: ${{ env.DOCS_BUILD_REF }}
          run: make html  # or your documentation build command

  • Sources DOCS_BUILD_REF from GITHUB_SHA, which is the commit hash of the current build.

• For CircleCI:

  • Modify your CircleCI configuration (e.g., .circleci/config.yml):

  jobs:
    build:
      docker:
        - image: cimg/python:3.9  # Or your preferred image
      steps:
        - checkout
        - run:
            name: Set DOCS_BUILD_REF
            command: |
              echo 'export DOCS_BUILD_REF=${CIRCLE_SHA1}' >> $BASH_ENV
              source $BASH_ENV
        - run:
            name: Build Documentation
            command: |
              make html  # or your documentation build command

  • Sets DOCS_BUILD_REF using CIRCLE_SHA1, the commit hash for the build.

4. Provide an Example for Dynamic Local Builds

• In your documentation (e.g., README.md):

  ### Building Documentation with a Custom Git Reference
  
  By default, the documentation links to the `stable` branch on GitHub. To override this and link to the specific commit you're working on, set the `DOCS_BUILD_REF` environment variable:
  
  ```bash
  export DOCS_BUILD_REF=$(${GIT:-git} rev-parse --verify HEAD)
  make html  # or your documentation build command

  This command dynamically sets DOCS_BUILD_REF to the current Git commit hash, ensuring that documentation links point to the exact version of your code.

5. Update CI Scripts to Account for the Variable

• Ensure that all scripts or commands that build the documentation in CI environments are using the updated DOCS_BUILD_REF variable.

  • Double-check any scripts that might override or unset environment variables.
  • Consistently pass the environment variable to any subprocesses if necessary.

6. Enhance Maintainability and Portability

• Leverage Environment Variables from CI Systems:

  • Using built-in CI variables (GITHUB_SHA and CIRCLE_SHA1) ensures that the documentation reflects the exact state of the code at each commit.
  • Promotes consistency across different CI environments.

• Default Behavior:

  • Defaulting to "stable" maintains the current behavior for environments where DOCS_BUILD_REF is not set, ensuring backward compatibility.

7. Test the Changes Thoroughly

• Verify Default Behavior:

  • Build the documentation without setting DOCS_BUILD_REF to ensure links point to the stable branch.

• Verify CI Integration:

  • Trigger builds in both GitHub Actions and CircleCI.
  • Confirm that DOCS_BUILD_REF is correctly set to the commit hash and that documentation links are accurate.

• Verify Local Builds:

  • Test the local build example to ensure it sets DOCS_BUILD_REF properly and that links in the documentation point to the local commit hash.

• Check for Breakages:

  • Monitor build logs for errors or warnings.
  • Validate that all links in the generated documentation are working and correctly formatted.

---

This updated plan implements your suggestions and focuses on:

• Code Style and Conventions:

  • Adherence to project-specific coding standards.
  • Clear and descriptive naming of variables and functions.
  • Comprehensive docstrings for clarity.

• Maintainability:

  • Centralizing configuration to minimize hardcoded values.
  • Leveraging CI environment variables for dynamic behavior.

• Portability:

  • Compatibility with different CI providers (GitHub Actions and CircleCI).
  • Examples for local development workflows.

• Documentation:

  • Clear instructions for contributors on how to customize the documentation build.
  • Transparency about how documentation links are generated.

Please review the updated plan and let me know if there are any additional changes or considerations.

---

✏️ Learnings added

``` Learnt from: reactive-firewall URL: https://github.com/reactive-firewall/multicast/issues/113 Timestamp: 2024-10-12T01:52:34.412Z Learning: Reactive-firewall prefers to use the environment variable `DOCS_BUILD_REF` to specify the documentation build reference, sourcing it from CI variables like `GITHUB_SHA` (for GitHub Actions) and `CIRCLE_SHA1` (for CircleCI). When building locally, they utilize `DOCS_BUILD_REF=$(${GIT:-git} rev-parse --verify HEAD)` to dynamically set the value, such as when triggered by a git-hook. ``` > Note: Learnings are effective only in the context of similar code segments. To apply general coding guidelines, please configure [review instructions](https://docs.coderabbit.ai/guides/review-instructions). You can manage existing learnings in the [app](https://app.coderabbit.ai/learnings).

---

🧠 Learnings used

``` Learnt from: reactive-firewall PR: reactive-firewall/multicast#0 File: :0-0 Timestamp: 2024-10-12T00:41:41.731Z 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#110 File: docs/CI.md:32-32 Timestamp: 2024-10-08T21:59:30.537Z Learning: Reactive-firewall prefers to keep the word "own" in headings when emphasizing the reader's personal test. ``` --- ``` Learnt from: reactive-firewall PR: reactive-firewall/multicast#110 File: docs/CI.md:32-32 Timestamp: 2024-09-17T06:40:42.918Z Learning: Reactive-firewall prefers to keep the word "own" in headings when emphasizing the reader's personal test. ``` --- ``` Learnt from: reactive-firewall PR: reactive-firewall/multicast#0 File: :0-0 Timestamp: 2024-10-08T03:15:05.171Z Learning: For future reviews, remember that when drafting or updating CEP documents, it's important to adhere to the project's standard format and include all relevant sections such as Motivation, Detailed Explanation, Implementation Guidelines, Impact, and References. ``` --- ``` Learnt from: reactive-firewall PR: reactive-firewall/multicast#0 File: :0-0 Timestamp: 2024-10-08T21:59:30.537Z Learning: For future reviews, remember that when drafting or updating CEP documents, it's important to adhere to the project's standard format and include all relevant sections such as Motivation, Detailed Explanation, Implementation Guidelines, Impact, and References. ``` --- ``` Learnt from: reactive-firewall PR: reactive-firewall/multicast#110 File: docs/USAGE.md:66-66 Timestamp: 2024-10-08T21:59:30.537Z Learning: Reactive-firewall prefers to use "Caveat" as a heading instead of "Caution". ``` --- ``` Learnt from: reactive-firewall PR: reactive-firewall/multicast#110 File: docs/USAGE.md:66-66 Timestamp: 2024-09-17T03:38:28.677Z Learning: Reactive-firewall prefers to use "Caveat" as a heading instead of "Caution". ``` --- ``` Learnt from: reactive-firewall PR: reactive-firewall/multicast#118 File: tests/check_pip:92-197 Timestamp: 2024-10-08T21:59:30.537Z Learning: Reactive-firewall prefers defining functions before they are called in Bash scripts to avoid errors due to Bash's sequential interpretation. ``` --- ``` Learnt from: reactive-firewall PR: reactive-firewall/multicast#118 File: tests/check_pip:92-197 Timestamp: 2024-09-24T01:03:10.574Z Learning: Reactive-firewall prefers defining functions before they are called in Bash scripts to avoid errors due to Bash's sequential interpretation. ``` --- ``` Learnt from: reactive-firewall PR: reactive-firewall/multicast#0 File: :0-0 Timestamp: 2024-10-08T21:59:30.537Z Learning: For future reviews, remember that reactive-firewall prefers to replace custom exit codes with standard ones (e.g., using `125` instead of a custom `89`) to maintain consistency with POSIX standards. ```