[issue46890] venv does not create "python" link in python 3.11

[Ronald Oussoren]

Ronald Oussoren <ronaldoussoren at mac.com> added the comment:

This is be related to how the virtual environment is populated. In 3.10 the "python3.10" name in the environment is a symlink to sys.executable. In 3.10 "Python" (not the capital) is a symlink to the binary in Python.app and "python3.11" is a symlink to "Python".  Given that the filesystem is case preserving there is no "python" name.

The behaviour in 3.11 is clearly a bug: the virtual environment is no longer using the launcher binary in "{sys.prefix]/bin" but directly uses the "real" binary (in a framework build), and because of that scripts cannot use system APIs that expect to run in an application bundle. 

Listing "env/bin" in Python 3.10:
-rw-rw-r--  1 ronald  staff  9033 Mar  1 18:11 Activate.ps1
-rw-rw-r--  1 ronald  staff  2018 Mar  1 18:11 activate
-rw-rw-r--  1 ronald  staff   944 Mar  1 18:11 activate.csh
-rw-rw-r--  1 ronald  staff  2086 Mar  1 18:11 activate.fish
-rwxr-xr-x  1 ronald  staff   269 Mar  1 18:11 pip
-rwxr-xr-x  1 ronald  staff   269 Mar  1 18:11 pip3
-rwxr-xr-x  1 ronald  staff   269 Mar  1 18:11 pip3.10
lrwxr-xr-x  1 ronald  staff    10 Mar  1 18:11 python -> python3.10
lrwxr-xr-x  1 ronald  staff    10 Mar  1 18:11 python3 -> python3.10
lrwxr-xr-x  1 ronald  staff    65 Mar  1 18:11 python3.10 -> /Library/Frameworks/Python.framework/Versions/3.10/bin/python3.10

In python3.11:
total 72
-rw-rw-r--  1 ronald  staff  9033 Mar  1 17:23 Activate.ps1
lrwxr-xr-x  1 ronald  staff    93 Mar  1 17:23 Python -> /Library/Frameworks/Python.framework/Versions/3.11/Resources/Python.app/Contents/MacOS/Python
-rw-rw-r--  1 ronald  staff  2018 Mar  1 17:23 activate
-rw-rw-r--  1 ronald  staff   944 Mar  1 17:23 activate.csh
-rw-rw-r--  1 ronald  staff  2086 Mar  1 17:23 activate.fish
-rwxr-xr-x  1 ronald  staff   265 Mar  1 17:23 pip
-rwxr-xr-x  1 ronald  staff   265 Mar  1 17:23 pip3
-rwxr-xr-x  1 ronald  staff   265 Mar  1 17:23 pip3.11
lrwxr-xr-x  1 ronald  staff     6 Mar  1 17:23 python3 -> Python
lrwxr-xr-x  1 ronald  staff     6 Mar  1 17:23 python3.11 -> Python

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components: +macOS
nosy: +ned.deily
priority: normal -> release blocker

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue46890>
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