Preferably use __pypackages__ in the current directory

[Ttayu]

Is your feature request related to a problem? Please describe.

In pdm 2.4.6, the current directory __pypackages__/{version}/lib is not referenced, but reference parent directory's one.
Suppose you have the following directory structure.
For example, when python is executed in package1, get_packages_path() in sitecustomize.py returns the location of __pypackages__ in package0.
Similarly, package2 refers to __pypackages__ in package1.

Can't this be made to use __pypackages__ in the current directory?

package0
├── package1
│   ├── package2
│   │   ├── pdm.lock
│   │   ├── __pypackages__
│   │   ├── pyproject.toml
│   │   └── README.md
│   ├── pdm.lock
│   ├── __pypackages__
│   ├── pyproject.toml
│   └── README.md
├── __pypackages__
├── pdm.lock
├── pyproject.toml
└── README.md

Version

pdm: 2.4.6
python: 3.10
OS:

NAME="Ubuntu"
VERSION="20.04.5 LTS (Focal Fossa)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 20.04.5 LTS"
VERSION_ID="20.04"
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
VERSION_CODENAME=focal
UBUNTU_CODENAME=focal

Describe the solution you'd like

Use find_paths.append(script_dir)

pdm/src/pdm/pep582/sitecustomize.py

Line 30 in 62f0cc9

find_paths.insert(0, script_dir)

I did not understand the intention of using "insert".
I have looked into the issue and am sorry if this has already been discussed.

[frostming]

I don't think your proposed solution has anything to do with the described issue.

get_packages_path() requires __pypackages__/{version}/lib to exist, can you confirm it exists in package1?

[Ttayu]

I assume that the lib directory exists in all __pypackages__ directories.
In fact, the append function works as I expected.
I am wondering if this is the expected behavior according to pdm.

[Ttayu]

Setup

$ cd work_dir
$ mkdir -p package0/package1/
$ cd package0
$ pdm init
# All interactive must be set to 'yes'. Otherwise, the 'name' variable will not be initialized in pyproject.toml
$ pdm add isort # anything is ok.
$ cd package1
$ pdm init
$ pdm add mypy

Good

$ pwd
/path/to/work_dir/package0/package1
$ python -c "import mypy"
$ python -c "import isort" # ModuleNotFoundError: No module named 'isort'

Bad?

$ pwd
/path/to/work_dir/package0/package1
$ python
>>> import isort
>>> import mypy
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ModuleNotFoundError: No module named 'mypy'