python-bundler 0.1.0

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Python Bundler (experimental)

This repo creates executable zipfiles similar to zipapp, pex, and shiv.

It's useful when one:

• Wants to create compiled packages from a lockfile
• Wants to be able to debug the resulting environment without unzipping
• Doesn't mind an initial startup cost to create the virtualenv
• Wants to use mostly python tooling instead of rejiggering everything to e.g. Bazel

It does not solve some of the core problems with python and its packaging, such as:

• Some python packages will not work on different python versions, architectures, etc
• Python takes up a lot of space relative to its functionality
• Python is duck-typed at runtime

Alternatives:

Package Name	Is publicly supported	Requires different directory structure	Installs all dependencies automatically	Easy to debug
zipapp	yes, included with python	Maybe, must have __main__.py	No, they must be manually included via pip install -r requirements.txt --target <directory> before build time	No, must unzip the file to edit
pex	yes, large project	No, works on console scripts	Can specify requirements.txt manually at build time	No, must unzip the file to edit
shiv	yes, past 1.0.0, by linkedin	No, works on console scripts	No, must specify the dependencies on the command line at build time	No, must unzip the file to edit
this repo	no	No, works on console scripts	Yes, uses poetry lockfile	Yes, can edit the installation venv
bazel	yes, but many modern-python conveniences have a time lag	Yes	One can wire it up with requirements.txt	No, but it can made to be with some effort

Rough Comparisons:

Package Name	Runtime	Command	English definition	Size
zipapp	1.9-2.5s	pip install . --target python_bundler && python -m zipapp python_bundler/	Install the current package to the target directory, then make a zipapp out of said directory	48M
pex	5s for the first run, then 3.2-3.5s	pex '.' --console-script python_bundler --output project_bundle.pex	Make a pex env containing the current package, then make an executable pexfile out of the python_bundler console script	21M
shiv	2.5s for the first run, then 0.6-0.8s	shiv -c python_bundler -o python_bundler.shiv '.'	Make a shiv file using python_bundler console script. Install the current directory.	20M
this repo	11s for the first run, then 0.6-0.7s	python_bundler python_bundler	Use the current directory's lockfile to create an executable zipfile from the python_bundler console script	16M
bazel	n/a	n/a	n/a	n/a