Cannot parse version number from TOML 1.0.0 pyproject.toml file

[Jazzinghen]

Description: When providing a pyproject.toml that uses TOML 1.0.0 entries as python-version-file the action fails due to an error within the TOML parser.

Action version: v5.1.0

Platform:

• [x] Ubuntu
• [ ] macOS
• [ ] Windows

Runner type:

• [x] Hosted
• [ ] Self-hosted

Tools version:

• Python 3.10 (the one installed by default)
• Python 3.12 (the target version)

Repro steps:
Create a pyproject.toml file using a mixed list (here is the default value for Poetry Dynamic Versioning):

[tool.poetry]
name = "test_package"
description = "Test package to setup python on Github"
requires-python = ">=3.12"
license = ""
keywords = []
authors = [
    "Jazzinghen <jazzinghen@test.com>" 
]

[build-system]
requires = ["poetry-core>=1.8.0", "poetry-dynamic-versioning>=1.0.0"]
build-backend = "poetry_dynamic_versioning.backend"

[tool.poetry-dynamic-versioning]
enable = false
strict = true
style = "pep440"
pattern = "default-unprefixed"
tag-branch = "origin/main"

[tool.poetry-dynamic-versioning.substitution]
folders = [{ path = "src" }]
patterns = [
  "(^__version__\\s*(?::.*?)?=\\s*['\"])[^'\"]*(['\"])",
  "(^release\\s*(?::.*?)?=\\s*['\"])[^'\"]*(['\"])",
  { value = "(^__version_tuple__\\s*(?::.*?)?=\\s*\\()[^)]*(\\))", mode = "tuple" },
]

[tool.poetry.dependencies]
python = "^3.12"

Run the action using the file as "Python version file".

Expected behavior: The action installs Python >=3.12 in the job's container.

Actual behavior: The action fails with the following error:

 Error: Inline lists must be a single type, not a mix of string and inline-table at row 27, col 84, pos 757:
26:    "(^release\\s*(?::.*?)?=\\s*['\"])[^'\"]*(['\"])",
27>   { value = "(^__version_tuple__\\s*(?::.*?)?=\\s*\\()[^)]*(\\))", mode = "tuple" },
                                                                                       ^
28: ]

[JamesParrott]

The dev version of the toml library used by this tool has supported Toml 1.0.0-rc1 (that allows mixed types in arrays) since 2019.
It's currently on v3.0.0 https://github.com/iarna/iarna-toml/releases/tag/v3.0.0

This tool must pull the previous version from NPM that's 4 years old. v2.2.5 must enforce Toml 0.5.0 rules, which forbid mixed types in an Array, as the error says.

https://www.npmjs.com/package/@iarna/toml

I don't know if the builder or typescript compiler can pull in packages from Github instead of npm. But if so, fixing this should just need a version bump here and elsewhere:

https://github.com/actions/setup-python/blob/82c7e631bb3cdc910f68e0081d67478d79c6982d/package-lock.json#L19

[aparnajyothi-y]

Hello @Jazzinghen, Thank you for creating this issue and we will look into it :)

[Jazzinghen]

@aparnajyothi-y Thank you for letting me know.