Example of vendoring failure with 'package.module' style imports

README

# install vendoring
pip install vendoring

# vendor tuf and securesystemslib in to _vendor/
vendoring sync -v

# test: If you do not have tuf installed, this will fail
# (_vendor/tuf/client/updater.py tries to import tuf.download)
python3 -m _vendor.tuf.client.updater 

pyproject.toml

[tool.vendoring]
destination = "_vendor/"
requirements = "vendor.txt"
namespace = "_vendor"
protected-files = ["vendor.txt",]
patches-dir = "patches"

[tool.vendoring.transformations]
substitute = []
drop = ["bin/",]

[tool.vendoring.license.fallback-urls]
tuf = "https://github.com/theupdateframework/tuf/blob/develop/LICENSE"
[tool.vendoring.license.directories]
[tool.vendoring.typing-stubs]

vendor.txt

tuf==0.14.0
securesystemslib==0.16.0