[issue13475] Add '--mainpath'/'--nomainpath' command line options to override sys.path[0] initialisation

[STINNER Victor]

STINNER Victor  added the comment:

See also bpo-16202 "sys.path[0] security issues".

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[issue13475] Add '--mainpath'/'--nomainpath' command line options to override sys.path[0] initialisation

[STINNER Victor]

STINNER Victor  added the comment:

The problem of long option names is that they cannot be used in a Unix shebang: 
"#!/usr/bin/python3 --long-option".

I propose to add the -P option to not add sys.path[0]: I wrote GH-31542.

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[issue13475] Add '--mainpath'/'--nomainpath' command line options to override sys.path[0] initialisation

[STINNER Victor]

Change by STINNER Victor :


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pull_requests: +29665
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/31542

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[issue13475] Add '--mainpath'/'--nomainpath' command line options to override sys.path[0] initialisation

[STINNER Victor]

STINNER Victor  added the comment:

See also "Python flag/envvar not to put current directory to sys.path (but 
don’t ignore PYTHONPATH)" discussion:
https://discuss.python.org/t/python-flag-envvar-not-to-put-current-directory-to-sys-path-but-dont-ignore-pythonpath/4235/2

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nosy: +vstinner

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[issue13475] Add '--mainpath'/'--nomainpath' command line options to override sys.path[0] initialisation

[Neil Isaac]

Change by Neil Isaac :


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nosy: +nisaac

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[issue13475] Add '--mainpath'/'--nomainpath' command line options to override sys.path[0] initialisation

[Nick Coghlan]

Nick Coghlan  added the comment:

Retitled the issue using the `--mainpath` spelling, as I wanted to link to it 
from the PEP 582 discussion, and that's my current favourite from the various 
ideas I've had since first filing the issue.

(I decided I didn't like `--basepath` because we already have `sys.base_prefix` 
that refers to something entirely different)

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title: Add '-p'/'--path0' command line option to override sys.path[0] 
initialisation -> Add '--mainpath'/'--nomainpath' command line options to 
override sys.path[0] initialisation
type:  -> enhancement
versions: +Python 3.9 -Python 3.4

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