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README.md
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README.md
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@ -47,151 +47,7 @@ The `python-version` input supports the [Semantic Versioning Specification](http
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Using `architecture` input it is possible to specify required Python/PyPy interpreter architecture: `x86` or `x64`. If input is not specified the architecture defaults to `x64`.
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<<<<<<< HEAD
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## Caching packages dependencies
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=======
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Download and set up the latest stable version of Python (for specified major version):
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```yaml
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steps:
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- uses: actions/checkout@v3
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- uses: actions/setup-python@v4
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with:
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python-version: '3.x'
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- run: python my_script.py
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```
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Download and set up PyPy:
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```yaml
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jobs:
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build:
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runs-on: ubuntu-latest
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strategy:
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matrix:
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python-version:
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- 'pypy3.7' # the latest available version of PyPy that supports Python 3.7
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- 'pypy3.7-v7.3.3' # Python 3.7 and PyPy 7.3.3
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- 'pypy3.8' # the latest available version of PyPy that supports Python 3.8
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steps:
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- uses: actions/checkout@v3
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- uses: actions/setup-python@v4
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with:
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python-version: ${{ matrix.python-version }}
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- run: python my_script.py
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```
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More details on PyPy syntax and examples of using preview / nightly versions of PyPy can be found in the [Available versions of PyPy](#available-versions-of-pypy) section.
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An output is available with the absolute path of the python interpreter executable if you need it:
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```yaml
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jobs:
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build:
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runs-on: ubuntu-latest
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steps:
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- uses: actions/checkout@v3
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- uses: actions/setup-python@v4
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id: cp310
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with:
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python-version: "3.10"
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- run: pipx run --python '${{ steps.cp310.outputs.python-path }}' nox --version
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```
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>The environment variable `pythonLocation` also becomes available after Python or PyPy installation. It contains the absolute path to the folder where the desired version of Python or PyPy is installed.
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# Getting started with Python + Actions
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Check out our detailed guide on using [Python with GitHub Actions](https://help.github.com/en/actions/automating-your-workflow-with-github-actions/using-python-with-github-actions).
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# Available versions of Python
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`setup-python` is able to configure Python from two sources:
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- Preinstalled versions of Python in the tools cache on GitHub-hosted runners.
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- For detailed information regarding the available versions of Python that are installed, see [Supported software](https://docs.github.com/en/actions/reference/specifications-for-github-hosted-runners#supported-software).
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- For every minor version of Python, expect only the latest patch to be preinstalled.
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- If `3.8.1` is installed for example, and `3.8.2` is released, expect `3.8.1` to be removed and replaced by `3.8.2` in the tools cache.
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- If the exact patch version doesn't matter to you, specifying just the major and minor version will get you the latest preinstalled patch version. In the previous example, the version spec `3.8` will use the `3.8.2` Python version found in the cache.
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- Use `-dev` instead of a patch number (e.g., `3.11-dev`) to install the latest patch version release for a given minor version, *alpha and beta releases included*.
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- Downloadable Python versions from GitHub Releases ([actions/python-versions](https://github.com/actions/python-versions/releases)).
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- All available versions are listed in the [version-manifest.json](https://github.com/actions/python-versions/blob/main/versions-manifest.json) file.
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- If there is a specific version of Python that is not available, you can open an issue here
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**Note:** Python versions used in this action are generated in the [python-versions](https://github.com/actions/python-versions) repository. For macOS and Ubuntu images python versions are built from the source code. For Windows the python-versions repository uses installation executable. For more information please refer to the [python-versions](https://github.com/actions/python-versions) repository.
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# Available versions of PyPy
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`setup-python` is able to configure PyPy from two sources:
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- Preinstalled versions of PyPy in the tools cache on GitHub-hosted runners
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- For detailed information regarding the available versions of PyPy that are installed, see [Supported software](https://docs.github.com/en/actions/reference/specifications-for-github-hosted-runners#supported-software).
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- For the latest PyPy release, all versions of Python are cached.
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- Cache is updated with a 1-2 week delay. If you specify the PyPy version as `pypy3.7` or `pypy-3.7`, the cached version will be used although a newer version is available. If you need to start using the recently released version right after release, you should specify the exact PyPy version using `pypy3.7-v7.3.3` or `pypy-3.7-v7.3.3`.
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- Downloadable PyPy versions from the [official PyPy site](https://downloads.python.org/pypy/).
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- All available versions that we can download are listed in [versions.json](https://downloads.python.org/pypy/versions.json) file.
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- PyPy < 7.3.3 are not available to install on-flight.
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- If some versions are not available, you can open an issue in https://foss.heptapod.net/pypy/pypy/
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# Hosted Tool Cache
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GitHub hosted runners have a tools cache that comes with a few versions of Python + PyPy already installed. This tools cache helps speed up runs and tool setup by not requiring any new downloads. There is an environment variable called `RUNNER_TOOL_CACHE` on each runner that describes the location of this tools cache and there is where you will find Python and PyPy installed. `setup-python` works by taking a specific version of Python or PyPy in this tools cache and adding it to PATH.
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|| Location |
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|------|-------|
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|**Tool Cache Directory** |`RUNNER_TOOL_CACHE`|
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|**Python Tool Cache**|`RUNNER_TOOL_CACHE/Python/*`|
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|**PyPy Tool Cache**|`RUNNER_TOOL_CACHE/PyPy/*`|
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GitHub virtual environments are setup in [actions/virtual-environments](https://github.com/actions/virtual-environments). During the setup, the available versions of Python and PyPy are automatically downloaded, setup and documented.
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- Tools cache setup for Ubuntu: [Install-Toolset.ps1](https://github.com/actions/virtual-environments/blob/main/images/linux/scripts/installers/Install-Toolset.ps1) [Configure-Toolset.ps1](https://github.com/actions/virtual-environments/blob/main/images/linux/scripts/installers/Configure-Toolset.ps1)
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- Tools cache setup for Windows: [Install-Toolset.ps1](https://github.com/actions/virtual-environments/blob/main/images/win/scripts/Installers/Install-Toolset.ps1) [Configure-Toolset.ps1](https://github.com/actions/virtual-environments/blob/main/images/win/scripts/Installers/Configure-Toolset.ps1)
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# Specifying a Python version
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If there is a specific version of Python that you need and you don't want to worry about any potential breaking changes due to patch updates (going from `3.7.5` to `3.7.6` for example), you should specify the exact major, minor, and patch version (such as `3.7.5`)
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- The only downside to this is that set up will take a little longer since the exact version will have to be downloaded if the exact version is not already installed on the runner due to more recent versions.
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- MSI installers are used on Windows for this, so runs will take a little longer to set up vs Mac and Linux.
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You should specify only a major and minor version if you are okay with the most recent patch version being used.
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- There will be a single patch version already installed on each runner for every minor version of Python that is supported.
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- The patch version that will be preinstalled, will generally be the latest and every time there is a new patch released, the older version that is preinstalled will be replaced.
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- Using the most recent patch version will result in a very quick setup since no downloads will be required since a locally installed version Python on the runner will be used.
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# Specifying a PyPy version
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The version of PyPy should be specified in the format `pypy<python_version>[-v<pypy_version>]` or `pypy-<python_version>[-v<pypy_version>]`.
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The `<pypy_version>` parameter is optional and can be skipped. The latest version will be used in this case.
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```
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pypy3.7 or pypy-3.7 # the latest available version of PyPy that supports Python 3.7
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pypy3.8 or pypy-3.8 # the latest available version of PyPy that supports Python 3.8
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pypy2.7 or pypy-2.7 # the latest available version of PyPy that supports Python 2.7
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pypy3.7-v7.3.3 or pypy-3.7-v7.3.3 # Python 3.7 and PyPy 7.3.3
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pypy3.7-v7.x or pypy-3.7-v7.x # Python 3.7 and the latest available PyPy 7.x
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pypy3.7-v7.3.3rc1 or pypy-3.7-v7.3.3rc1 # Python 3.7 and preview version of PyPy
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pypy3.7-nightly or pypy-3.7-nightly # Python 3.7 and nightly PyPy
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```
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Note: `pypy2` and `pypy3` have been removed in v3. Use the format above instead.
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# Check latest version
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The `check-latest` flag defaults to `false`. Use the default or set `check-latest` to `false` if you prefer stability and if you want to ensure a specific `Python/PyPy` version is always used.
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If `check-latest` is set to `true`, the action first checks if the cached version is the latest one. If the locally cached version is not the most up-to-date, a `Python/PyPy` version will then be downloaded. Set `check-latest` to `true` if you want the most up-to-date `Python/PyPy` version to always be used.
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> Setting `check-latest` to `true` has performance implications as downloading `Python/PyPy` versions is slower than using cached versions.
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```yaml
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steps:
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- uses: actions/checkout@v3
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- uses: actions/setup-python@v3
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with:
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python-version: '3.7'
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check-latest: true
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- run: python my_script.py
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```
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# Caching packages dependencies
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>>>>>>> main
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The action has built-in functionality for caching and restoring dependencies. It uses [actions/cache](https://github.com/actions/toolkit/tree/main/packages/cache) under the hood for caching dependencies but requires less configuration settings. Supported package managers are `pip`, `pipenv` and `poetry`. The `cache` input is optional, and caching is turned off by default.
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@ -11,11 +11,7 @@ inputs:
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description: 'Used to specify a package manager for caching in the default directory. Supported values: pip, pipenv, poetry.'
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required: false
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architecture:
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<<<<<<< HEAD
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description: "The target architecture (x86, x64) of the Python/PyPy interpreter."
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=======
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description: 'The target architecture (x86, x64) of the Python interpreter.'
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>>>>>>> main
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check-latest:
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description: 'Set this option if you want the action to check for the latest available version that satisfies the version spec.'
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default: false
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