Python
Trivy supports three types of Python package managers: pip, Pipenv and Poetry.
The following table provides an outline of the features Trivy offers.
| Package manager | File | Transitive dependencies | Dev dependencies | Dependency graph | Position | License |
|---|---|---|---|---|---|---|
| pip | requirements.txt | - | Include | - | - | - |
| Pipenv | Pipfile.lock | ✅ | Include | - | ✅ | - |
| Poetry | poetry.lock | ✅ | Exclude | ✅ | - |
In addition, Trivy supports two formats of Python packages: egg and wheel.
| Packaging | License |
|---|---|
| Egg | ✅ |
| Wheel | ✅ |
These may be enabled or disabled depending on the target. See here for the detail.
Package managers
Trivy parses your files generated by package managers in filesystem/repository scanning.
pip
requirements.txt files usually contain only the direct dependencies and not contain the transitive dependencies.
Therefore, Trivy scans only for the direct dependencies with requirements.txt.
To detect transitive dependencies as well, you need to generate requirements.txt with pip freeze.
$ cat requirements.txt # it will only find `requests@2.28.2`.
requests==2.28.2
$ pip install -r requirements.txt
...
$ pip freeze > requirements.txt
$ cat requirements.txt # it will also find the transitive dependencies of `requests@2.28.2`.
certifi==2022.12.7
charset-normalizer==3.1.0
idna==3.4
PyJWT==2.1.0
requests==2.28.2
urllib3==1.26.15
pip freeze also helps to resolve extras(optional) dependencies (like package[extras]=0.0.0).
requirements.txt files don't contain information about dependencies used for development.
Trivy could detect vulnerabilities on the development packages, which not affect your production environment.
License detection is not supported for pip.
Pipenv
Trivy parses Pipfile.lock.
Pipfile.lock files don't contain information about dependencies used for development.
Trivy could detect vulnerabilities on the development packages, which not affect your production environment.
License detection is not supported for Pipenv.
Poetry
Trivy uses poetry.lock to identify dependencies and find vulnerabilities.
To build the correct dependency graph, pyproject.toml also needs to be present next to poetry.lock.
License detection is not supported for Poetry.
Packaging
Trivy parses the manifest files of installed packages in container image scanning and so on. See here for the detail.
Egg
Trivy looks for *.egg-info, *.egg-info/PKG-INFO, *.egg and EGG-INFO/PKG-INFO to identify Python packages.
Wheel
Trivy looks for .dist-info/META-DATA to identify Python packages.