Virtual env based python rez package (filesystem combined package)

README.md

Virtual env based python rez package

This is a combined package, which cannot be built but simply copying python.py into package repository. And it will provide clean, re-usable virtual env that created from system installed python that it could find.

$ rez-search python
python-2.7-venv
python-3.6-venv
python-3.7-venv
python-3.8-venv

requirement

These (pip) packages should be installed in Rez production env:

• pythonfinder
• virtualenv

Caveat

If regular python package (dir) and python.py combined pacakge both exists in same filesystem repository, only dir package will be iterated, so you have to place the combined one in another repository. e.g. ~/rez/package/combined

python.py

from pythonfinder import Finder


name = "python"

description = "Python interpreter provided from virtual env"

uuid = "python.virtualenv"

versions = [
    # e.g. "2.7-venv"
    py.py_version.name + "-venv"
    for py in Finder().find_all_python_versions()
]


def commands():
    import os
    import virtualenv
    from pythonfinder import Finder

    finder = Finder()
    python_exec = finder.find_python_version(this.version.major,
                                             minor=this.version.minor)
    if python_exec is None:
        stop("No python installed in system.")

    venv_dir = python_exec.path.parent / "rez.venv"

    args = [
        "--python", str(python_exec.path),
        "--no-seed",  # no pip, no wheel, no setuptools
        str(venv_dir)
    ]

    # compute venv
    session = virtualenv.session_via_cli(args)

    if not os.path.isdir(str(session.creator.bin_dir)):
        print("\tCreating virtual env..")
        session = virtualenv.cli_run(args)

    env.PATH.prepend(str(session.creator.bin_dir))

converted to https://github.com/davidlatwe/rez-python-venv