Req: Self containt booptstrap solution...

[jedie]

virtualenv hat the bootstrap solution, see: https://virtualenv.pypa.io/en/latest/virtualenv.html#creating-your-own-bootstrap-scripts

In the past it works on a vanilla python installation, because it fetched pi, setuptools etc. from the internet. This was removed sometime.
I was run into problems, because of this changes, see: pypa/virtualenv#656

Now there it the information Box:

.. note::

    The ``virtualenv.py`` script is *not* supported if run without the
    necessary pip/setuptools/virtualenv distributions available locally. All
    of the installation methods above include a ``virtualenv_support``
    directory alongside ``virtualenv.py`` which contains a complete set of
    pip and setuptools distributions, and so are fully supported.

What's about to create a separate bootstrap module, which create a bootstrap script that include everything needed to run on vanilla python?

Think pypa/virtualenv#632 is a similar intention.

[pfmoore]

It's certainly possible to do something like this (embed a base64-encoded zip file into the script, decode and unzip it to a temporary directory at runtime, etc).

If you need it, the facility to create a virtualenv "bootstrap" script should allow you to do so. But I don't expect the main virtualenv script to work that way.

[jedie]

First working code is here: https://gist.github.com/jedie/4bc671239b8959376d4b/01c83238e98b29b1bcb4323a46f9c838e87623a0

There are two files:

create_bootstrap.py which must be called to generate the bootstrap file. This file request the get_pip.py, check the SHS256 hash and put all together...

bootstrap_install_pip.py contains the extend_parser(), adjust_options(), after_install() code...

EDIT: In this solution i embed get_pip.py... The resulting filesize is around 1,4MB
A other solution would be to embed the pip & setuptools wheel files. IMHO the filesize will be similar.
Pro: It must not download the wheel files from the internet.
Con: I may have outdated wheel files, if the bootstrap is not up-to-date

embed get_pip.py Pro: I have the newest available pip/setuptools, even if the embeded get_pip.pyis outdated, isn't it? The downloads are verified via SSL certificates.
Con: pip/setuptools must be downloaded. But this is for me not a con. Because normally there are many other packages that would be downloaded and installed in the virtualenv via pip...

[jedie]

I have moved the gist into a new project: https://github.com/jedie/bootstrap_env

Any comments?

EDIT: i use it now by myself, see: https://github.com/jedie/PyLucid/tree/django-cms/bootstrap ;)

[jedie]

With v0.3.2 it works now also under Windows: https://github.com/jedie/bootstrap_env#boot-bootstrap_env

[merwok]

Nowadays I think we have bootstrap stories that work well:

• install python in your OS, use ensurepip and venv stdlib modules, get working virtual environments ✅
• use a python manager or workflow tool, install various python versions, get working envs ✅
• start from docker, create image based on a python image, use venv within ✅

So we could close this @woodruffw