ZAM-366: Implement parser.py in analyzers directory

[codegen-sh]

Description

This PR implements the missing parser.py module in the codegen-on-oss/codegen_on_oss/analyzers/ directory. The module provides specialized parsing functionality for code analysis, including abstract syntax tree (AST) generation and traversal for multiple programming languages.

Features Implemented

1. Core Parser Classes:

   • ASTNode: Base class for AST nodes with traversal capabilities
   • BaseParser: Abstract base class for all parsers
   • CodegenParser: Parser implementation using Codegen SDK
   • Language-specific parsers: PythonParser, JavaScriptParser, TypeScriptParser

2. Utility Functions:

   • create_parser: Factory function to create appropriate parser for a language
   • parse_file: Convenience function to parse a file
   • parse_code: Convenience function to parse code directly

3. Symbol and Dependency Analysis:

   • Extract functions, classes, and variables from code
   • Analyze imports and dependencies

4. Documentation and Examples:

   • Updated README.md with usage examples
   • Added example script in examples/parser_example.py
   • Comprehensive unit tests

Integration

The parser module is now integrated with the existing analyzer modules through the __init__.py file, making it available for use in code analysis workflows.

Testing

Added comprehensive unit tests in tests/test_analyzers_parser.py to ensure the parser works correctly.

Fixes ZAM-366

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💻 View my work • About Codegen

Summary by Sourcery

Add a new parser framework in the analyzers directory to generate and traverse ASTs for multiple languages, integrate it into the package exports, document its usage, and ensure correctness with examples and unit tests.

New Features:

• Implement parser.py module with ASTNode and BaseParser classes and multi-language parsers (PythonParser, JavaScriptParser, TypeScriptParser)

Enhancements:

• Expose parser classes and functions through the analyzers package init.py

Documentation:

• Update analyzers/README.md with parser module documentation and usage examples
• Add examples/parser_example.py demonstrating parsing and extraction workflows

Tests:

• Add comprehensive unit tests in tests/test_analyzers_parser.py covering parsing, AST traversal, symbol extraction, and dependency analysis

Description by Korbit AI

What change is being made?

Implement parser.py to provide code parsing and Abstract Syntax Tree (AST) generation functionality for multiple programming languages in the analyzers directory, update README.md accordingly, and adjust __init__.py for module exports.

Why are these changes being made?

This implementation provides essential parsing capabilities necessary for comprehensive static code analysis, symbol extraction, and dependency analysis across different languages (Python, JavaScript, TypeScript), supporting the broader goal of improving code quality, PR validation, and error detection within the Codegen project. This modularity allows easy integration and scalability of the analyzers' capabilities.

Is this description stale? Ask me to generate a new description by commenting /korbit-generate-pr-description

[sourcery-ai]

Reviewer's Guide

This PR fills in the missing parser layer by adding a comprehensive parser.py module (with ASTNode, BaseParser, CodegenParser, language-specific parsers, and utility functions), integrates it into the package exports, updates documentation, and adds targeted tests and usage examples.

File-Level Changes

Change	Details	Files
Implement new parser module with AST and multi-language support	Define ASTNode class with traversal, to_dict, and child management Introduce BaseParser abstraction and ParseError exception Implement CodegenParser with simplified AST building via SDK placeholder Provide PythonParser, JavaScriptParser, TypeScriptParser subclasses Add factory create_parser and convenience parse_file/parse_code functions	codegen-on-oss/codegen_on_oss/analyzers/parser.py
Expose parser API in analyzers package	Append ASTNode, BaseParser, CodegenParser and language parsers to exports Include create_parser, parse_file, and parse_code in init	codegen-on-oss/codegen_on_oss/analyzers/__init__.py
Update analyzers README to document parser functionality	Revise module list to include parser.py Add key features (AST generation, symbol/dependency extraction) Embed code snippets for parse_file, parse_code, and parser classes	codegen-on-oss/codegen_on_oss/analyzers/README.md
Add comprehensive unit tests for parser module	Test ASTNode init, traversal, to_dict, and child management Validate CodegenParser parse_file & parse_code behavior Verify symbol and dependency extraction logic Cover PythonParser, JavaScriptParser, TypeScriptParser instantiation Test create_parser, parse_file, and parse_code utilities	codegen-on-oss/tests/test_analyzers_parser.py
Provide usage examples in standalone script	Create sample code files and code strings for parsing Demonstrate symbol extraction and dependency reporting Include examples for Python, JavaScript, and TypeScript parsing Cleanup generated sample files after execution	codegen-on-oss/examples/parser_example.py

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[codegen-sh]

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[codegen-sh]

Hey! 👋 I see one of the checks failed. I am on it! 🫡

💻 View my work

[codegen-sh]

🧩 I need a bit more direction!

This task is complex - could you break it down into smaller steps?
For best results, try to add specific context, explicitly mention symbol names, etc.

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