pypa/pip

pip install --target --upgrade removes existing packages scripts

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#8,063 opened on Apr 16, 2020

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C: targetS: needs triagehelp wantedtype: bug

Description

Environment

  • pip version:20.0.2
  • Python version:3.8.2
  • OS:MacOS

Description pip with -t removed other file in target bin folder

Expected behavior

when install package ipython should not remove package pylint bin files

How to Reproduce

mkdir test
pip install -t test pylint
ls test/bin/
epylint  isort  pylint  pyreverse  symilar

pip install -U -t test ipython
ls test/bin/
easy_install  easy_install-3.8  iptest  iptest3  ipython  ipython3  pygmentize

Output

After install ipython, pylint is deleted.

Contributor guide

Tech stack
python
Domain
clibuild system
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
Pythonpip usagecommand line
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60
Research direction
Investigate the pip source code, particularly the install command and how it handles the target flag during upgrades. Look at how scripts are installed and removed, focusing on the logic that deletes existing scripts in the target bin folder. Examine the comments in issue #8063 for any proposed solutions or maintainer guidance. The fix likely involves ensuring that only scripts from the upgraded package are replaced, not all scripts in the target directory.