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# setup-uv
Set up your GitHub Actions workflow with a specific version of [uv](https://docs.astral.sh/uv/).
- Install a version of uv and add it to PATH
- Cache the installed version of uv to speed up consecutive runs on self-hosted runners
- Register problem matchers for error output
- (Optional) Persist the uv's cache in the GitHub Actions Cache
- (Optional) Verify the checksum of the downloaded uv executable
## Contents
- [Usage](#usage)
- [Install the latest version (default)](#install-the-latest-version-default)
- [Install a specific version](#install-a-specific-version)
- [Install a version by supplying a semver range](#install-a-version-by-supplying-a-semver-range)
- [Python version](#python-version)
- [Validate checksum](#validate-checksum)
- [Enable Caching](#enable-caching)
- [Cache dependency glob](#cache-dependency-glob)
- [Local cache path](#local-cache-path)
- [Disable cache pruning](#disable-cache-pruning)
- [Ignore nothing to cache](#ignore-nothing-to-cache)
- [GitHub authentication token](#github-authentication-token)
- [UV_TOOL_DIR](#uv_tool_dir)
- [UV_TOOL_BIN_DIR](#uv_tool_bin_dir)
- [Tilde Expansion](#tilde-expansion)
- [How it works](#how-it-works)
- [FAQ](#faq)
## Usage
### Install the latest version (default)
```yaml
- name: Install the latest version of uv
uses: astral-sh/setup-uv@v4
with:
version: "latest"
```
For an example workflow, see
[here](https://github.com/charliermarsh/autobot/blob/e42c66659bf97b90ca9ff305a19cc99952d0d43f/.github/workflows/ci.yaml).
### Install a specific version
```yaml
- name: Install a specific version of uv
uses: astral-sh/setup-uv@v4
with:
version: "0.4.4"
```
### Install a version by supplying a semver range
You can specify a [semver range](https://github.com/npm/node-semver?tab=readme-ov-file#ranges)
to install the latest version that satisfies the range.
```yaml
- name: Install a semver range of uv
uses: astral-sh/setup-uv@v4
with:
version: ">=0.4.0"
```
```yaml
- name: Pinning a minor version of uv
uses: astral-sh/setup-uv@v4
with:
version: "0.4.x"
```
### Python version
You can use the input `python-version` to set the environment variable `UV_PYTHON` for the rest
of your workflow.
This will override any python version specifications in `pyproject.toml` and `.python-version`
```yaml
- name: Install the latest version of uv and set the python version to 3.12
uses: astral-sh/setup-uv@v4
with:
python-version: "3.12"
```
You can combine this with a matrix to test multiple python versions:
```yaml
jobs:
test:
runs-on: ubuntu-latest
strategy:
matrix:
python-version: ["3.9", "3.10", "3.11", "3.12"]
steps:
- uses: actions/checkout@v4
- name: Install the latest version of uv and set the python version
uses: astral-sh/setup-uv@v4
with:
python-version: ${{ matrix.python-version }}
- name: Test with python ${{ matrix.python-version }}
run: uv run --frozen pytest
```
### Validate checksum
You can specify a checksum to validate the downloaded executable. Checksums up to the default version
are automatically verified by this action. The sha256 hashes can be found on the
[releases page](https://github.com/astral-sh/uv/releases) of the uv repo.
```yaml
- name: Install a specific version and validate the checksum
uses: astral-sh/setup-uv@v4
with:
version: "0.3.1"
checksum: "e11b01402ab645392c7ad6044db63d37e4fd1e745e015306993b07695ea5f9f8"
```
### Enable caching
If you enable caching, the [uv cache](https://docs.astral.sh/uv/concepts/cache/) will be uploaded to
the GitHub Actions cache. This can speed up runs that reuse the cache by several minutes.
> [!TIP]
>
> On self-hosted runners this is usually not needed since the cache generated by uv on the runner's
> filesystem is not removed after a run. For more details see [Local cache path](#local-cache-path).
You can optionally define a custom cache key suffix.
```yaml
- name: Enable caching and define a custom cache key suffix
id: setup-uv
uses: astral-sh/setup-uv@v4
with:
enable-cache: true
cache-suffix: "optional-suffix"
```
When the cache was successfully restored, the output `cache-hit` will be set to `true` and you can
use it in subsequent steps. For example, to use the cache in the above case:
```yaml
- name: Do something if the cache was restored
if: steps.setup-uv.outputs.cache-hit == 'true'
run: echo "Cache was restored"
```
#### Cache dependency glob
If you want to control when the GitHub Actions cache is invalidated, specify a glob pattern with the
`cache-dependency-glob` input. The GitHub Actions cache will be invalidated if any file matching the glob pattern
changes. If you use relative paths, they are relative to the repository root.
> [!NOTE]
>
> The default is
> ```yaml
> cache-dependency-glob: |
> **/requirements*.txt
> **/uv.lock
> ```
```yaml
- name: Define a cache dependency glob
uses: astral-sh/setup-uv@v4
with:
enable-cache: true
cache-dependency-glob: "**/pyproject.toml"
```
```yaml
- name: Define a list of cache dependency globs
uses: astral-sh/setup-uv@v4
with:
enable-cache: true
cache-dependency-glob: |
**/requirements*.txt
**/pyproject.toml
```
```yaml
- name: Define an absolute cache dependency glob
uses: astral-sh/setup-uv@v4
with:
enable-cache: true
cache-dependency-glob: "/tmp/my-folder/requirements*.txt"
```
```yaml
- name: Never invalidate the cache
uses: astral-sh/setup-uv@v4
with:
enable-cache: true
cache-dependency-glob: ""
```
### Local cache path
This action controls where uv stores its cache on the runner's filesystem by setting `UV_CACHE_DIR`.
It defaults to `setup-uv-cache` in the `TMP` dir, `D:\a\_temp\uv-tool-dir` on Windows and
`/tmp/setup-uv-cache` on Linux/macOS. You can change the default by specifying the path with the
`cache-local-path` input.
```yaml
- name: Define a custom uv cache path
uses: astral-sh/setup-uv@v4
with:
cache-local-path: "/path/to/cache"
```
### Disable cache pruning
By default, the uv cache is pruned after every run, removing pre-built wheels, but retaining any
wheels that were built from source. On GitHub-hosted runners, it's typically faster to omit those
pre-built wheels from the cache (and instead re-download them from the registry on each run).
However, on self-hosted or local runners, preserving the cache may be more efficient. See
the [documentation](https://docs.astral.sh/uv/concepts/cache/#caching-in-continuous-integration) for
more information.
If you want to persist the entire cache across runs, disable cache pruning with the `prune-cache`
input.
```yaml
- name: Don't prune the cache before saving it
uses: astral-sh/setup-uv@v4
with:
enable-cache: true
prune-cache: false
```
### Ignore nothing to cache
By default, the action will fail if caching is enabled but there is nothing to upload (the uv cache directory does not exist).
If you want to ignore this, set the `ignore-nothing-to-cache` input to `true`.
```yaml
- name: Ignore nothing to cache
uses: astral-sh/setup-uv@v4
with:
enable-cache: true
ignore-nothing-to-cache: true
```
### GitHub authentication token
This action uses the GitHub API to fetch the uv release artifacts. To avoid hitting the GitHub API
rate limit too quickly, an authentication token can be provided via the `github-token` input. By
default, the `GITHUB_TOKEN` secret is used, which is automatically provided by GitHub Actions.
If the default
[permissions for the GitHub token](https://docs.github.com/en/actions/security-for-github-actions/security-guides/automatic-token-authentication#permissions-for-the-github_token)
are not sufficient, you can provide a custom GitHub token with the necessary permissions.
```yaml
- name: Install the latest version of uv with a custom GitHub token
uses: astral-sh/setup-uv@v4
with:
github-token: ${{ secrets.CUSTOM_GITHUB_TOKEN }}
```
### UV_TOOL_DIR
On Windows `UV_TOOL_DIR` is set to `uv-tool-dir` in the `TMP` dir (e.g. `D:\a\_temp\uv-tool-dir`).
On GitHub hosted runners this is on the much faster `D:` drive.
On all other platforms the tool environments are placed in the
[default location](https://docs.astral.sh/uv/concepts/tools/#tools-directory).
If you want to change this behaviour (especially on self-hosted runners) you can use the `tool-dir`
input:
```yaml
- name: Install the latest version of uv with a custom tool dir
uses: astral-sh/setup-uv@v4
with:
tool-dir: "/path/to/tool/dir"
```
### UV_TOOL_BIN_DIR
On Windows `UV_TOOL_BIN_DIR` is set to `uv-tool-bin-dir` in the `TMP` dir (e.g.
`D:\a\_temp\uv-tool-bin-dir`). On GitHub hosted runners this is on the much faster `D:` drive. This
path is also automatically added to the PATH.
On all other platforms the tool binaries get installed to the
[default location](https://docs.astral.sh/uv/concepts/tools/#the-bin-directory).
If you want to change this behaviour (especially on self-hosted runners) you can use the
`tool-bin-dir` input:
```yaml
- name: Install the latest version of uv with a custom tool bin dir
uses: astral-sh/setup-uv@v4
with:
tool-bin-dir: "/path/to/tool-bin/dir"
```
### Tilde Expansion
This action supports expanding the `~` character to the user's home directory for the following inputs:
- `cache-local-path`
- `tool-dir`
- `tool-bin-dir`
- `cache-dependency-glob`
```yaml
- name: Expand the tilde character
uses: astral-sh/setup-uv@v4
with:
cache-local-path: "~/path/to/cache"
tool-dir: "~/path/to/tool/dir"
tool-bin-dir: "~/path/to/tool-bin/dir"
cache-dependency-glob: "~/my-cache-buster"
```
## How it works
This action downloads uv from the uv repo's official
[GitHub Releases](https://github.com/astral-sh/uv) and uses the
[GitHub Actions Toolkit](https://github.com/actions/toolkit) to cache it as a tool to speed up
consecutive runs on self-hosted runners.
The installed version of uv is then added to the runner PATH, enabling subsequent steps to invoke it
by name (`uv`).
## FAQ
### Do I still need `actions/setup-python` alongside `setup-uv`?
No. This action is modelled as a drop-in replacement for `actions/setup-python` when using uv. With
`setup-uv`, you can install a specific version of Python using `uv python install` rather than
relying on `actions/setup-python`.
For example:
```yaml
- name: Checkout the repository
uses: actions/checkout@main
- name: Install the latest version of uv
uses: astral-sh/setup-uv@v4
with:
enable-cache: true
- name: Test
run: uv run --frozen pytest
```
To install a specific version of Python, use
[`uv python install`](https://docs.astral.sh/uv/guides/install-python/):
```yaml
- name: Install the latest version of uv
uses: astral-sh/setup-uv@v4
with:
enable-cache: true
- name: Install Python 3.12
run: uv python install 3.12
```
### What is the default version?
By default, this action installs the latest version of uv.
If you require the installed version in subsequent steps of your workflow, use the `uv-version`
output:
```yaml
- name: Checkout the repository
uses: actions/checkout@main
- name: Install the default version of uv
id: setup-uv
uses: astral-sh/setup-uv@v4
- name: Print the installed version
run: echo "Installed uv version is ${{ steps.setup-uv.outputs.uv-version }}"
```
## Acknowledgements
`setup-uv` was initially written and published by [Kevin Stillhammer](https://github.com/eifinger)
before moving under the official [Astral](https://github.com/astral-sh) GitHub organization. You can
support Kevin's work in open source on [Buy me a coffee](https://www.buymeacoffee.com/eifinger) or
[PayPal](https://paypal.me/kevinstillhammer).
## License
MIT
<div align="center">
<a target="_blank" href="https://astral.sh" style="background:none">
<img src="https://raw.githubusercontent.com/astral-sh/uv/main/assets/svg/Astral.svg" alt="Made by Astral">
</a>
</div>
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