freezeburn 0.1.0

Freeze what you actually use. Generate requirements.txt from real imports and installed packages.

freezeburn

Freeze what you actually use.

Generate requirements.txt from real imports + installed packages. No guessing. No network.

Install

pip install freezeburn

Usage

freezeburn                      # Scan current directory
freezeburn /path/to/project     # Scan specific directory
freezeburn -o requirements.txt  # Custom output file
freezeburn -q                   # Suppress warnings

What It Does

1. Scans .py files (respects .gitignore and .reqignore)
2. Extracts imports via AST
3. Detects stdlib dynamically (sys.stdlib_module_names)
4. Intersects with installed packages
5. Outputs exact pinned versions

What It Does NOT Do

• Query PyPI
• Guess versions
• Resolve transitive dependencies
• Detect dynamic imports
• Be "smart"

Ignore Files

Create .reqignore for freezeburn-specific exclusions:

tests/
scripts/
examples/*.py

Uses gitignore syntax. .gitignore is also respected.

How It Works

Imports (AST)  +  Installed (env)  =  requirements.txt
     |                  |                    |
   flask              flask==2.3.2      flask==2.3.2
   requests           requests==2.31    requests==2.31
   mymodule           (not installed)   (skipped + warning)
   os                 (stdlib)          (skipped)

Requirements

• Python 3.10+
• Activated virtualenv with your dependencies

License

MIT