Regression: Pypy version must be specified explicitly

[toonn]

Description:
Potentially a regression.
While Python versions can be specified ambiguously, e.g. 3.x, at some point this behavior was lost for Pypy versions.

Action version:
v4 (Believe it's also the case for v3 and v2)

Platform:

• Ubuntu
• macOS
• Windows

Runner type:

• Hosted
• Self-hosted

Tools version:

Repro steps:
To reproduce all you need is an action that tries to install an ambiguous Pypy version:

name: Pypy tests

on: push

jobs:
  test_pypy:
    runs-on: ubuntu-latest
    strategy:
      max-parallel: 4
      matrix:
        python-version: [pypy2, pypy3]
    env:
      TERM: dumb
    steps:
    - uses: actions/checkout@v3
    - name: Set up Python ${{ matrix.python-version }}
      uses: actions/setup-python@v4
      with:
        python-version: ${{ matrix.python-version }}

I've also tried pypy3.x.

Expected behavior:
This used to work and is still possible for CPython version specifications.

Actual behavior:

test_pypy (pypy2)
Invalid format of Python version for PyPy. Python version should be specified in format 'x.y'. See README for examples and documentation.

[dmitry-shibanov]

Hello @toonn. Thank you for your report. It's deprecated syntax. You can try to use some of this variants.

[toonn]

I may just be dense but that's the documentation I've been referencing to try to figure out how to get the behavior back. AFAICT it's only possible to specify specific versions of Pypy, e.g. pypy3.9, not "any Pypy version compatible with CPython 3."

[dmitry-shibanov]

Hello @toonn. It was changed starting from v3. For v2 it was coded to use pypy3.6 if you specify it as pypy3. Now pypy-3.6 is getting removed from the images that is why it fails.

[toonn]

Is it not possible to reintroduce the feature? It's very useful to be able to say "Whatever the latest Pypy 3 is."

[dmitry-shibanov]

Hello @toonn. For now we're not planing to return such syntax because previously when you specified pypy3 it was pypy-3.6 all the time. We do not provide pypy3 because PyPy depends on both PyPy version and Python version.

For now I'm going to close the issue.

[toonn]

I know it was kinda broken before but since it's deemed useful for CPython, I assume it's clear that it's useful for Pypy too? Can't this issue remain open as a feature request?