https://github.com/amolenaar/pdm-isolation-issue

https://github.com/amolenaar/pdm-isolation-issue

Last synced: 24 days ago
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• Host: GitHub
• URL: https://github.com/amolenaar/pdm-isolation-issue
• Owner: amolenaar
• Created: 2024-06-14T13:23:33.000Z (5 months ago)
• Default Branch: main
• Last Pushed: 2024-06-17T08:07:28.000Z (5 months ago)
• Last Synced: 2024-06-17T09:34:17.476Z (5 months ago)
• Language: Python
• Size: 2.93 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# PDM isolation issue

> This is a showcase project for https://github.com/pdm-project/pdm/issues/2944, not a project template.

This project shows an issue with installing packages in non-isolation mode with PDM.

This project will normally not install, since the build-system requires a non-existant dependency. This project does make clear the difference in how pip and pdm deal with isolation in the build environment.

 

First, let's create a venv with pip, since we need pip later:

```bash

pdm venv create --with-pip

```

The `--no-isolation` flag configured as default in `pyproject.toml`.

Output from `pdm install`:

```

STATUS: Resolving packages from lockfile...

All packages are synced to date, nothing to do.

Installing the project as an editable package...

  ✖ Update pdm-isolation-issue 0.0.0 -> 0.0.0 failed

See /Users/arjan/Library/Logs/pdm/pdm-install-1mphslqa.log for detailed debug log.

[CandidateNotFound]: Unable to find candidates for not-a-valid-dependency. There may exist some issues with the package name or network condition.

WARNING: Add '-v' to see the detailed traceback

```

This errors, since `not-a-valid-dependency` cannot be found.

If you try something similar with pip, it works fine:

```bash

pdm run pip install --no-build-isolation -e .

```

```

See how pip completely ignores the requires 

Obtaining file:///Users/arjan/Development/pdm-isolation-issue

  Checking if build backend supports build_editable ... done

  Preparing editable metadata (pyproject.toml) ... done

Building wheels for collected packages: pdm-isolation-issue

  Building editable for pdm-isolation-issue (pyproject.toml) ... done

  Created wheel for pdm-isolation-issue: filename=pdm_isolation_issue-0.0.0-0.editable-py3-none-any.whl size=3174 sha256=22c4805dc722286ee127733e9e25371c09f2f74f6027f9237b69a616a51c7f7f

  Stored in directory: /private/var/folders/l8/5_rjsk6x11xcvhv7jj4k59mw0000gp/T/pip-ephem-wheel-cache-pbdbv6r3/wheels/6b/37/4f/9d916904a97d98f19fa901a471956ad96111cd8908787ee002

Successfully built pdm-isolation-issue

Installing collected packages: pdm-isolation-issue

Successfully installed pdm-isolation-issue-0.0.0

```

Pip completely ignores `build-system.requires` when installing in non-isolated mode.