Add Node.js pattern matching to ident.py

[doomedraven]

No description provided.

[gemini-code-assist]

Summary of Changes

Hello @doomedraven, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly enhances the sflock tool's ability to identify Node.js files. It achieves this by introducing a robust set of regular expressions designed to recognize common Node.js constructs, such as shebangs, module imports, global objects, and API calls related to file systems, networking, and process execution. A new identifier function has been implemented to utilize these patterns, ensuring more accurate and automated classification of Node.js scripts within the system.

Highlights

• Node.js Pattern Matching: Introduced a comprehensive set of regular expressions, categorized by functionality (e.g., Explicit Directives, Core Globals, System Execution, File System Access, Networking & OS, Module System), to accurately identify Node.js files.
• New nodejs Identifier Function: Added a dedicated nodejs(f) function that leverages these newly defined patterns. This function counts the occurrences of Node.js-specific patterns within a file's content and returns 'nodejs' if a sufficient number of patterns are matched, indicating a high probability of it being a Node.js script.
• Integration into identify Function: The new nodejs identifier has been seamlessly integrated into the main identify function, allowing sflock to automatically detect and classify Node.js files alongside other supported file types.

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[gemini-code-assist]

Code Review

This pull request introduces functionality to identify Node.js files using regex pattern matching. The overall approach is good, but the current implementation contains a couple of critical bugs that would cause the application to crash. I've provided specific comments and code suggestions to fix these issues, primarily related to undefined variables and a syntax error in the new nodejs function.