Blinter 1.0.2

Blinter is a linter for Windows batch files. It provides comprehensive static analysis to identify syntax errors, security vulnerabilities, performance issues and style problems.

Blinter 🚀

Blinter is a linter for Windows batch files (.bat and .cmd). It provides comprehensive static analysis to identify syntax errors, security vulnerabilities, performance issues and style problems. Blinter helps you write safer, more reliable and maintainable batch scripts. Even in 2025, batch files deserve professional tooling! 💻

• ✅ Configurable Options - Configurable rules, logging, robust error handling
• ✅ Unicode Support - Support for international characters and filenames
• ✅ Performance Optimized - Handles large files (10MB+) efficiently

Features ✨

🔍 Rule Categories

• 114 Built-in Rules across 5 severity levels
• Error Level (E001-E999): Critical syntax errors that prevent execution
• Warning Level (W001-W999): Potential runtime issues and bad practices
• Style Level (S001-S999): Code formatting and readability improvements
• Security Level (SEC001+): Security vulnerabilities and dangerous operations
• Performance Level (P001-P999): Optimization opportunities and efficiency improvements

📖 For complete rule descriptions with examples and implementation details, see docs/Batch-File-Linter-Requirements.md

📋 Output Format

• Rule Codes: Each issue has a unique identifier (e.g., E002, W005, SEC003)
• Clear Explanations: Detailed descriptions of why each issue matters
• Actionable Recommendations: Specific guidance on how to fix problems
• Line-by-Line Analysis: Precise location of every issue
• Context Information: Additional details about detected problems

🚀 Advanced Analysis

• Static Code Analysis: Detects unreachable code and logic errors
• Advanced Variable Expansion: Validates percent-tilde syntax (%~n1), string operations, and SET /A arithmetic
• Command-Specific Validation: FOR loop variations, IF statement best practices, deprecated command detection
• Variable Tracking: Identifies undefined variables and unsafe usage patterns
• Security Scanning: Path traversal attacks, command injection risks, unsafe temp file creation
• Performance Optimization: DIR flag optimization, unnecessary output detection, string operation efficiency
• Cross-Platform Compatibility: Warns about Windows version issues and deprecated commands
• Large File Handling: Efficiently processes files up to 10MB+ with performance warnings
• Robust Encoding Detection: Handles UTF-8, UTF-16, Latin-1 and 6 more encoding formats

Installation 🛠️

Prerequisites

• Python 3.9+ (required)

Quick Install

1. Clone the repository:

git clone https://github.com/tboy1337/Blinter.git
cd Blinter

2. (Optional) Create a virtual environment:

python -m venv venv
venv\Scripts\activate

3. (Optional but recommended) Install dependencies:

pip install -r requirements.txt

Usage 📟

Basic Usage

# Analyze a single batch file
python blinter.py script.bat

# Analyze all batch files in a directory (recursive)
python blinter.py /path/to/batch/files

# Analyze batch files in directory only (non-recursive)
python blinter.py /path/to/batch/files --no-recursive

# Analyze with summary
python blinter.py script.bat --summary

# Get help
python blinter.py --help

Command Line Options

• <path>: Path to a batch file (.bat or .cmd) OR directory containing batch files
• --summary: Display summary statistics of issues found
• --severity: Show detailed severity level breakdown (always included)
• --no-recursive: When processing directories, only analyze files in the specified directory (not subdirectories)
• --help: Show help menu and rule categories

🐍 Programmatic API Usage

Blinter provides a powerful Python API for integration into your applications:

import blinter

# Basic usage
issues = blinter.lint_batch_file("script.bat")
for issue in issues:
    print(f"Line {issue.line_number}: {issue.rule.name} ({issue.rule.code})")
    print(f"  {issue.rule.explanation}")
    print(f"  Fix: {issue.rule.recommendation}")

# Advanced configuration
issues = blinter.lint_batch_file(
    "script.bat",
    max_line_length=100,           # Custom line length limit  
    enable_style_rules=False,      # Disable style checks
    enable_performance_rules=True  # Keep performance checks
)

# Thread-safe design allows safe concurrent usage
# You can implement your own concurrent processing if needed
from concurrent.futures import ThreadPoolExecutor

files = ["script1.bat", "script2.cmd", "script3.bat"]
with ThreadPoolExecutor(max_workers=4) as executor:
    results = list(executor.map(blinter.lint_batch_file, files))

🔧 Configuration Options

Parameter	Type	Default	Description
file_path	str	Required	Path to batch file to analyze
max_line_length	int	120	Maximum line length for S011 rule
enable_style_rules	bool	True	Enable/disable style-related rules
enable_performance_rules	bool	True	Enable/disable performance rules

Note: Security rules are always enabled for safety.

Supported File Types

• .bat files (traditional batch files)
• .cmd files (recommended for modern Windows)
• Unicode filenames and international characters supported
• Large files (10MB+) handled efficiently with performance monitoring

📁 Directory Processing

Blinter can analyze entire directories of batch files with powerful options:

• Recursive Analysis: Automatically finds and processes all .bat and .cmd files in directories and subdirectories
• Non-Recursive Mode: Use --no-recursive to analyze only files in the specified directory
• Batch Processing: Handles multiple files efficiently with consolidated reporting
• Error Resilience: Continues processing other files even if some files have encoding or permission issues
• Progress Tracking: Shows detailed results for each file plus combined summary statistics

Examples:

# Analyze all batch files in project directory and subdirectories
python blinter.py ./my-batch-scripts

# Analyze only batch files in current directory (no subdirectories)  
python blinter.py . --no-recursive

# Get combined summary for entire directory
python blinter.py ./scripts --summary

🔥 Integration Example

CI/CD Integration

# Example GitHub Actions workflow
- name: Lint Batch Files
  run: |
    python -c "
    import blinter
    import sys
    issues = blinter.lint_batch_file('deploy.bat')
    errors = [i for i in issues if i.rule.severity.value == 'Error']
    if errors:
        print(f'Found {len(errors)} critical errors!')
        sys.exit(1)
    print(f'✅ Batch file passed with {len(issues)} total issues')
    "

Contributing 🤝

Contributions are welcome!

Ways to Contribute

• 🐛 Report bugs or issues
• 💡 Suggest new rules or features
• 📖 Improve documentation
• 🧪 Add test cases
• 🔧 Submit bug fixes or enhancements

License 📄

This project is licensed under the CRL License - see LICENSE.md for details.