Portable python binaries
Project description
Portable python binaries
This project is a python CLI that aims to make compiling portable python binaries automatable.
What is a “portable python”?
It’s a binary python distribution (.tar.gz or .zip) that can be decompressed in any folder, and used from there without further ado (ie: no need to run an “installer” and things like that).
The idea here is to allow for automated systems to:
Easily obtain a python binary, that can be used in sandboxes / workstations / laptops / instances…
Have an open source tool that can compile such portable pythons reliably, without having to worry about the compilation part.
Be able to inspect any python installation, and point out how portable it is, which shared or non-standard libraries it is using
Guiding principles
Focuses on just one thing: compile a portable python, and validate that it is indeed portable, produce outcome in (configurable) ./dist/ folder and that’s it
Only the last few non-EOL versions of python are supported (no historical stuff)
As time goes on, the code of this tool will evolve so that the latest pythons keep building (but won’t worry that older versions still keep building)
C compilation is done as simply as possible: no “patching” of any sort, rely solely on the upstream make/configure scripts, typically via stuff like --enable-shared=no
Builds are validated, an important part of the effort was to write up code that is able to inspect a python installation and detect whether it is portable or not (and why not if so).
cpython is initially supported, but aiming to compile any python family in the future (pypy, conda, …)
Cross-compilation would be cool, but only if upstream supports it (ie: only if doable via stuff like ./configure --host=... - no on-the-fly patching allowed)
For this repo itself:
Code is pure python, it is a CLI with one entry-point called portable-python
Can be ran in a debugger
100% test coverage, has a --dryrun mode to help with testing / debugging / seeing what would be done quickly
No shell scripts (those are hard to maintain/test/debug)
Can be pip install-ed and reused
Installation
portable-python is a regular python CLI, it can be installed with:
pickley install portable-python portable-python --help
Or pipx:
pipx install portable-python
You can also run it directly (without explicit install) with pipx:
pipx run portable-python inspect /usr/bin/python3
Using pip install (a CI builder would probably do this):
/usr/bin/python3 -mvenv /tmp/pp /tmp/pp/bin/python -mpip install portable-python /tmp/pp/bin/portable-python --help /tmp/pp/bin/portable-python inspect /usr/bin/python3
Invoke a build from python code:
from portable_python import BuildSetup
setup = BuildSetup("cpython:3.9.7")
setup.compile()
Invoke an inspection from python code:
from portable_python.inspector import PythonInspector
inspector = PythonInspector("/usr/bin/python3")
print(inspector.represented())
problem = inspector.full_so_report.get_problem(portable=True)
if problem:
print("oops, it is not portable!: %s" % problem)
From source, contributions welcome!:
git clone https://github.com/codrsquad/portable-python.git cd portable-python tox -e venv .venv/bin/portable-python --help .venv/bin/portable-python inspect /usr/bin/python3 tox -e py39 tox -e style
Building a portable cpython
Once you’ve installed portable-python, you can get going like so:
# Build a binary cd some-temp-folder portable-python build 3.9.7 ls -l dist/cpython-3.9.7-macos-arm64.tar.gz # Unpack it somewhere tar -C ~/.pyenv/versions/ -xf dist/cpython-3.9.7-macos-arm64.tar.gz ls -l ~/.pyenv/versions/ # It's ready to be used ~/.pyenv/versions/3.9.7/bin/python --version
Note that you can use --dryrun mode to inspect what would be done without doing it:
$ portable-python --dryrun build 3.9.7 INFO selected: xz openssl gdbm (3 modules) xz:5.2.5 openssl:1.1.1k gdbm:1.18.1 INFO Platform: macos-x86_64 ... -------------- -- xz:5.2.5 -- -------------- Would download https://tukaani.org/xz/xz-5.2.5.tar.gz Would untar build/sources/xz-5.2.5.tar.gz -> build/components/xz INFO env PATH=build/deps/bin:/usr/bin:/bin INFO env MACOSX_DEPLOYMENT_TARGET=10.14 Would run: ./configure --prefix=build/deps --enable-shared=no --enable-static=yes ... ... ------------------- -- cpython:3.9.7 -- ------------------- Would download https://www.python.org/ftp/python/3.9.7/Python-3.9.7.tar.xz Would untar build/sources/Python-3.9.7.tar.xz -> build/components/cpython ... Would run: ./configure --prefix=/ppp-marker/3.9.7 --enable-optimizations ... Would run: /usr/bin/make Would run: /usr/bin/make install DESTDIR=build ... Would tar build/3.9.7 -> dist/cpython-3.9.7-macos-x86_64.tar.gz
Build folder structure
portable-python uses this file structure (build/ and dist/ folders configurable):
build/
ppp-marker/3.9.7/ # Full installation (after build completes)
components/ # Builds of statically compiled extension modules are here
deps/ # --prefix=.../deps passed to all component ./configure scripts
sources/
openssl-1.1.1k.tar.gz # Downloaded artifacts (downloaded only once)
dist/
cpython-3.9.7-macos-arm64.tar.gz # Ready-to-go portable binary tarball
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