Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

fix lock still been held in forked subprocess due to open fd #4

Merged
merged 2 commits into from
Oct 8, 2024

Conversation

shinny-chengzhi
Copy link
Collaborator

@shinny-chengzhi shinny-chengzhi commented Sep 30, 2024

Summary by CodeRabbit

  • 新功能
    • 改进了文件锁定功能,增强了错误管理和文件描述符处理的清晰度与健壮性。
  • 文档
    • 更新了flocked函数的签名,尽管参数未变,但内部逻辑已修改以提高可读性。
  • 测试
    • 调整了CI测试中的Python版本矩阵,现仅包括Python 3.9至3.12。

Copy link

coderabbitai bot commented Sep 30, 2024

📝 Walkthrough
📝 Walkthrough

Walkthrough

此次更改涉及flocked上下文管理器函数的文件描述符(fd)处理和错误管理的重构。fd的初始值被修改为-1,并简化了打开文件的逻辑。现在,打开文件的try块直接处理PermissionError异常,以便在文件存在于具有粘性位的目录中时回退为只读模式。yield语句被包装在try块中,以确保在finally子句中释放锁,最终清理文件描述符以防止资源泄漏。此外,.github/workflows/test.yml文件中的Python版本矩阵也进行了修改,仅测试Python 3.9至3.12版本。

Changes

文件路径 更改摘要
src/shinny_filelock/_flockd.py 修改flocked函数,优化文件描述符处理和错误管理,更新函数签名,简化控制流。
.github/workflows/test.yml 修改Python版本矩阵,仅测试Python 3.9至3.12版本。

Poem

在兔子洞里,锁住了梦,
文件安全,心中无惧,
错误处理,轻松应对,
代码简洁,欢声笑语,
兔子跳跃,庆祝新生,
让我们一起,享受这份乐趣! 🐇✨


📜 Recent review details

Configuration used: CodeRabbit UI
Review profile: CHILL

📥 Commits

Files that changed from the base of the PR and between 07b901a and 6c7f6d8.

⛔ Files ignored due to path filters (1)
  • pyproject.toml is excluded by !**/*.toml
📒 Files selected for processing (1)
  • .github/workflows/test.yml (1 hunks)
🔇 Additional comments (1)
.github/workflows/test.yml (1)

17-17: 需要澄清测试矩阵中Python版本范围的变更原因

这个更改将测试矩阵中的Python版本范围从3.7-3.12缩小到了3.9-3.12。这个改动引发了以下几个问题:

  1. 移除对Python 3.7和3.8的测试可能会影响项目的向后兼容性。
  2. 这个更改似乎与PR的主要目标(修复forked子进程中的锁问题)没有直接关系。
  3. 仍在使用Python 3.7或3.8的用户可能会受到影响。

请解释做出这个更改的原因,以及它如何与PR的主要目标相关联。同时,请确认项目是否不再支持Python 3.7和3.8版本。

✅ Verification successful

Python版本支持范围修改已符合项目要求

根据pyproject.toml中声明的requires-python = ">=3.9",在.github/workflows/test.yml中移除Python 3.7和3.8是合理的,不会影响项目的兼容性。

🏁 Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# 描述:验证项目文档中声明的Python版本支持范围

# 测试:检查README.md文件中是否有关于Python版本支持的说明
echo "Checking README.md for Python version support information:"
cat README.md | grep -i "python" | grep -i "version"

# 测试:检查setup.py或pyproject.toml文件中的Python版本要求
echo -e "\nChecking setup.py or pyproject.toml for Python version requirements:"
if [ -f setup.py ]; then
    cat setup.py | grep -i "python_requires"
elif [ -f pyproject.toml ]; then
    cat pyproject.toml | grep -i "requires-python"
else
    echo "Neither setup.py nor pyproject.toml found"
fi

Length of output: 453


Thank you for using CodeRabbit. We offer it for free to the OSS community and would appreciate your support in helping us grow. If you find it useful, would you consider giving us a shout-out on your favorite social media?

❤️ Share
🪧 Tips

Chat

There are 3 ways to chat with CodeRabbit:

  • Review comments: Directly reply to a review comment made by CodeRabbit. Example:
    • I pushed a fix in commit <commit_id>, please review it.
    • Generate unit testing code for this file.
    • Open a follow-up GitHub issue for this discussion.
  • Files and specific lines of code (under the "Files changed" tab): Tag @coderabbitai in a new review comment at the desired location with your query. Examples:
    • @coderabbitai generate unit testing code for this file.
    • @coderabbitai modularize this function.
  • PR comments: Tag @coderabbitai in a new PR comment to ask questions about the PR branch. For the best results, please provide a very specific query, as very limited context is provided in this mode. Examples:
    • @coderabbitai gather interesting stats about this repository and render them as a table. Additionally, render a pie chart showing the language distribution in the codebase.
    • @coderabbitai read src/utils.ts and generate unit testing code.
    • @coderabbitai read the files in the src/scheduler package and generate a class diagram using mermaid and a README in the markdown format.
    • @coderabbitai help me debug CodeRabbit configuration file.

Note: Be mindful of the bot's finite context window. It's strongly recommended to break down tasks such as reading entire modules into smaller chunks. For a focused discussion, use review comments to chat about specific files and their changes, instead of using the PR comments.

CodeRabbit Commands (Invoked using PR comments)

  • @coderabbitai pause to pause the reviews on a PR.
  • @coderabbitai resume to resume the paused reviews.
  • @coderabbitai review to trigger an incremental review. This is useful when automatic reviews are disabled for the repository.
  • @coderabbitai full review to do a full review from scratch and review all the files again.
  • @coderabbitai summary to regenerate the summary of the PR.
  • @coderabbitai resolve resolve all the CodeRabbit review comments.
  • @coderabbitai configuration to show the current CodeRabbit configuration for the repository.
  • @coderabbitai help to get help.

Other keywords and placeholders

  • Add @coderabbitai ignore anywhere in the PR description to prevent this PR from being reviewed.
  • Add @coderabbitai summary to generate the high-level summary at a specific location in the PR description.
  • Add @coderabbitai anywhere in the PR title to generate the title automatically.

CodeRabbit Configuration File (.coderabbit.yaml)

  • You can programmatically configure CodeRabbit by adding a .coderabbit.yaml file to the root of your repository.
  • Please see the configuration documentation for more information.
  • If your editor has YAML language server enabled, you can add the path at the top of this file to enable auto-completion and validation: # yaml-language-server: $schema=https://coderabbit.ai/integrations/schema.v2.json

Documentation and Community

  • Visit our Documentation for detailed information on how to use CodeRabbit.
  • Join our Discord Community to get help, request features, and share feedback.
  • Follow us on X/Twitter for updates and announcements.

Copy link

@coderabbitai coderabbitai bot left a comment

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Actionable comments posted: 0

🧹 Outside diff range and nitpick comments (3)
src/shinny_filelock/_flockd.py (3)

17-24: 改进了文件打开逻辑,但可以进一步优化错误处理

这些更改改进了文件打开的逻辑,特别是对于具有粘性位的目录。这是一个很好的改进,可以提高代码的健壮性。

然而,我建议进一步改进错误处理:

    try:
        fd = os.open(path, fd_flags_with_create if create_file else fd_flags)
    except PermissionError:
        # maybe file exists and sits in a directory with sticky bits
        fd = os.open(path, fd_flags)
-   if fd == -1:
-       raise ValueError()
+   if fd == -1:
+       raise ValueError(f"无法打开文件:{path}")

这样可以提供更具体的错误信息,有助于调试。


32-37: 锁处理逻辑得到了改进,解决了fork子进程中的锁问题

这些更改直接解决了PR标题中提到的问题。通过在finally块中显式释放锁,确保了即使在fork的子进程中也能正确释放锁。这是一个很好的改进。

建议稍微调整注释,使其更清晰:

        try:
            yield
        finally:
-           # early unlock in case someone is holding the fd(eg: fork without exec)
-           # lock may also released due to fd closure when inheritable is true
+           # 提前解锁,以防有人持有fd(例如:fork但未exec)
+           # 当inheritable为true时,锁也可能因fd关闭而释放
            fcntl.flock(fd, fcntl.LOCK_UN)

这样可以更好地解释代码的行为,特别是对于不熟悉这些细节的开发人员。


39-41: 清理逻辑得到了改进,但可以进一步优化注释

这些更改通过添加注释和确保fd关闭来改进了资源管理。这对于防止资源泄漏非常重要,特别是在长时间运行的进程或频繁打开和关闭文件的进程中。

建议稍微调整注释,使其更加明确:

-       # lock should already released
-       # close fd to avoid resource leak
+       # 此时锁应该已经被释放
+       # 关闭文件描述符以避免资源泄漏
        os.close(fd)

这样可以更清楚地说明代码的意图和行为。

📜 Review details

Configuration used: CodeRabbit UI
Review profile: CHILL

📥 Commits

Files that changed from the base of the PR and between 5062871 and 07b901a.

📒 Files selected for processing (1)
  • src/shinny_filelock/_flockd.py (1 hunks)
🔇 Additional comments (1)
src/shinny_filelock/_flockd.py (1)

Line range hint 1-41: 总体评价:代码改进显著,解决了关键问题

这些更改成功地解决了PR标题中提到的问题,即修复了在fork子进程中仍然持有锁的问题。主要改进包括:

  1. 改进了文件打开逻辑,特别是对于具有粘性位的目录。
  2. 通过在finally块中显式释放锁,确保了在各种情况下都能正确释放锁。
  3. 添加了有助于理解代码行为的注释。

这些更改提高了代码的健壮性和可维护性。建议的小改进主要集中在错误处理和注释的清晰度上,这些都是次要的优化。

总的来说,这是一个高质量的PR,解决了一个重要的问题。

@shinny-taojiachun shinny-taojiachun merged commit d62f975 into master Oct 8, 2024
8 checks passed
@shinny-taojiachun shinny-taojiachun deleted the fix-fork-race branch October 8, 2024 02:50
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Labels
None yet
Projects
None yet
Development

Successfully merging this pull request may close these issues.

2 participants