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			327 lines
		
	
	
		
			13 KiB
		
	
	
	
		
			Markdown
		
	
	
	
	
	
			
		
		
	
	
			327 lines
		
	
	
		
			13 KiB
		
	
	
	
		
			Markdown
		
	
	
	
	
	
# setup-dotnet
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[](https://github.com/actions/setup-dotnet/actions/workflows/basic-validation.yml)
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[](https://github.com/actions/setup-dotnet/actions/workflows/e2e-tests.yml)
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This action sets up a [.NET CLI](https://github.com/dotnet/sdk) environment for use in actions by:
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- optionally downloading and caching a version(s) of dotnet by SDK version(s) and adding to PATH
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- registering problem matchers for error output
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- setting up authentication to private package sources like GitHub Packages
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> **Note**: GitHub hosted runners have some versions of the .NET SDK
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preinstalled. Installed versions are subject to change. Please refer to the
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documentation:
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[Software installed on github hosted runners](https://docs.github.com/en/actions/using-github-hosted-runners/about-github-hosted-runners/about-github-hosted-runners#supported-software)
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for .NET SDK versions that are currently available.
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## Usage
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See [action.yml](action.yml)
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**Basic**:
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```yaml
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steps:
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- uses: actions/checkout@v4
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- uses: actions/setup-dotnet@v4
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  with:
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    dotnet-version: '8.0.x'
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- run: dotnet build <my project>
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```
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> **Warning**: Unless a concrete version is specified in the [`global.json`](https://learn.microsoft.com/en-us/dotnet/core/tools/global-json) file, **_the latest .NET version installed on the runner (including preinstalled versions) will be used [by default](https://learn.microsoft.com/en-us/dotnet/core/versions/selection#the-sdk-uses-the-latest-installed-version)_**. Please refer to the [documentation](https://docs.github.com/en/actions/using-github-hosted-runners/about-github-hosted-runners/about-github-hosted-runners#supported-software) for the currently preinstalled .NET SDK versions.
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**Multiple version installation**:
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```yml
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steps:
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- uses: actions/checkout@v4
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- name: Setup dotnet
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  uses: actions/setup-dotnet@v4
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  with:
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    dotnet-version: | 
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      8.0.x
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      9.0.x
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- run: dotnet build <my project>
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```
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## Supported version syntax
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The `dotnet-version` input supports following syntax:
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- **A.B.C** (e.g 6.0.400, 7.0.100-preview.7.22377.5) - installs exact version of .NET SDK
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- **A.B** or **A.B.x** (e.g. 8.0, 8.0.x) - installs the latest patch version of .NET SDK on the channel `8.0`, including prerelease versions (preview, rc)
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- **A** or **A.x** (e.g. 8, 8.x) - installs the latest minor version of the specified major tag, including prerelease versions (preview, rc)
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- **A.B.Cxx** (e.g. 8.0.4xx) - available since `.NET 5.0` release. Installs the latest version of the specific SDK release, including prerelease versions (preview, rc). 
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## Using the `dotnet-quality` input
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This input sets up the action to install the latest build of the specified quality in the channel. The possible values of `dotnet-quality` are: **daily**, **signed**, **validated**, **preview**, **ga**.
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> **Note**: `dotnet-quality` input can be used only with .NET SDK version in 'A.B', 'A.B.x', 'A', 'A.x' and 'A.B.Cxx' formats where the major version is higher than 5. In other cases, `dotnet-quality` input will be ignored.
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```yml
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steps:
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- uses: actions/checkout@v4
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- uses: actions/setup-dotnet@v4
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  with:
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    dotnet-version: '8.0.x'
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    dotnet-quality: 'preview'
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- run: dotnet build <my project>
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```
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## Using the `global-json-file` input
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`setup-dotnet` action can read .NET SDK version from a `global.json` file. Input `global-json-file` is used for specifying the path to the `global.json`. If the file that was supplied to `global-json-file` input doesn't exist, the action will fail with error.
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>**Note**: In case both `dotnet-version` and `global-json-file` inputs are used, versions from both inputs will be installed.
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```yml
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steps:
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- uses: actions/checkout@v4
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- uses: actions/setup-dotnet@v4
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  with:
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    global-json-file: csharp/global.json
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- run: dotnet build <my project>
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  working-directory: csharp
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```
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## Caching NuGet Packages
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The action has a built-in functionality for caching and restoring dependencies. It uses [toolkit/cache](https://github.com/actions/toolkit/tree/main/packages/cache) under the hood for caching global packages data but requires less configuration settings. The `cache` input is optional, and caching is turned off by default.
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The action searches for [NuGet Lock files](https://learn.microsoft.com/nuget/consume-packages/package-references-in-project-files#locking-dependencies) (`packages.lock.json`) in the repository root, calculates their hash and uses it as a part of the cache key. If lock file does not exist, this action throws error. Use `cache-dependency-path` for cases when multiple dependency files are used, or they are located in different subdirectories.
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> **Warning**: Caching NuGet packages is available since .NET SDK 2.1.500 and 2.2.100 as the NuGet lock file [is available](https://learn.microsoft.com/nuget/consume-packages/package-references-in-project-files#locking-dependencies) only for NuGet 4.9 and above.
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```yaml
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steps:
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- uses: actions/checkout@v4
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- uses: actions/setup-dotnet@v4
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  with:
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    dotnet-version: 8.x
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    cache: true
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- run: dotnet restore --locked-mode
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```
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> **Note**: This action will only restore `global-packages` folder, so you will probably get the [NU1403](https://learn.microsoft.com/nuget/reference/errors-and-warnings/nu1403) error when running `dotnet restore`.
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> To avoid this, you can use [`DisableImplicitNuGetFallbackFolder`](https://github.com/dotnet/reproducible-builds/blob/abfe986832aa28597d3340b92469d1a702013d23/Documentation/Reproducible-MSBuild/Techniques/DisableImplicitNuGetFallbackFolder.md) option.
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```xml
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<PropertyGroup>
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  <DisableImplicitNuGetFallbackFolder>true</DisableImplicitNuGetFallbackFolder>
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</PropertyGroup>
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```
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### Reduce caching size
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> **Note**: Use [`NUGET_PACKAGES`](https://learn.microsoft.com/nuget/reference/cli-reference/cli-ref-environment-variables) environment variable if available. Some action runners already has huge libraries. (ex. Xamarin)
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```yaml
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env:
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  NUGET_PACKAGES: ${{ github.workspace }}/.nuget/packages
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steps:
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- uses: actions/checkout@v4
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- uses: actions/setup-dotnet@v4
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  with:
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    dotnet-version: 8.x
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    cache: true
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- run: dotnet restore --locked-mode
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```
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### Caching NuGet packages in monorepos
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```yaml
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env:
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  NUGET_PACKAGES: ${{ github.workspace }}/.nuget/packages
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steps:
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- uses: actions/checkout@v4
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- uses: actions/setup-dotnet@v4
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  with:
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    dotnet-version: 8.x
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    cache: true
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    cache-dependency-path: subdir/packages.lock.json
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- run: dotnet restore --locked-mode
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```
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## Matrix Testing
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Using `setup-dotnet` it's possible to use [matrix syntax](https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#jobsjob_idstrategymatrix) to install several versions of .NET SDK:
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```yml
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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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        dotnet: [ '7.0.x', '8.0.x', '9.0.x' ]
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    name: Dotnet ${{ matrix.dotnet }} sample
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    steps:
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      - uses: actions/checkout@v4
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      - name: Setup dotnet
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        uses: actions/setup-dotnet@v4
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        with:
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          dotnet-version: ${{ matrix.dotnet }}
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      - name: Execute dotnet
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        run: dotnet build <my project>
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```
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>**Note**: Unless a concrete version is specified in the [`global.json`](https://learn.microsoft.com/en-us/dotnet/core/tools/global-json) file, the latest .NET version installed on the runner (including preinstalled versions) will be used [by default](https://learn.microsoft.com/en-us/dotnet/core/versions/selection#the-sdk-uses-the-latest-installed-version). To control this behavior you may want to use temporary `global.json` files:
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**Matrix testing with temporary global.json creation**
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```yml
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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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        dotnet: [ '7.0.x', '8.0.x', '9.0.x' ]
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    name: Dotnet ${{ matrix.dotnet }} sample
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    steps:
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      - uses: actions/checkout@v4
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      - name: Setup dotnet
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        uses: actions/setup-dotnet@v4
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        id: stepid
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        with:
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          dotnet-version: ${{ matrix.dotnet }}
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      - name: Create temporary global.json
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        run: echo '{"sdk":{"version": "${{ steps.stepid.outputs.dotnet-version }}"}}' > ./global.json
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      - name: Execute dotnet
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        run: dotnet build <my project>
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```
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## Setting up authentication for nuget feeds
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### Github Package Registry (GPR)
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```yml
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steps:
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- uses: actions/checkout@v4
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- uses: actions/setup-dotnet@v4
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  with:
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    dotnet-version: '8.0.x'
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    source-url: https://nuget.pkg.github.com/<owner>/index.json
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  env:
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    NUGET_AUTH_TOKEN: ${{secrets.GITHUB_TOKEN}}
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- run: dotnet build <my project>
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- name: Create the package
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  run: dotnet pack --configuration Release <my project>
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- name: Publish the package to GPR
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  run: dotnet nuget push <my project>/bin/Release/*.nupkg
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```
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### Azure Artifacts
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```yml
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- uses: actions/setup-dotnet@v4
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  with:
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    source-url: https://pkgs.dev.azure.com/<your-organization>/_packaging/<your-feed-name>/nuget/v3/index.json
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  env:
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    NUGET_AUTH_TOKEN: ${{secrets.AZURE_DEVOPS_PAT}} # Note, create a secret with this name in Settings
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- name: Publish the package to Azure Artifacts
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  run: dotnet nuget push <my project>/bin/Release/*.nupkg
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```
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### nuget.org
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```yml
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- uses: actions/setup-dotnet@v4
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  with:
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    dotnet-version: 8.0.x
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- name: Publish the package to nuget.org
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  run: dotnet nuget push */bin/Release/*.nupkg -k $NUGET_AUTH_TOKEN -s https://api.nuget.org/v3/index.json
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  env:
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    NUGET_AUTH_TOKEN: ${{ secrets.NUGET_TOKEN }}
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```
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> **Note**: It's the only way to push a package to nuget.org feed for macOS/Linux machines due to API key config store limitations.
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# Outputs and environment variables
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## Outputs
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### `dotnet-version`
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Using the **dotnet-version** output it's possible to get the installed by the action .NET SDK version. 
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**Single version installation**
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In case of a single version installation, the `dotnet-version` output contains the version that is installed by the action.
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```yaml
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    - uses: actions/setup-dotnet@v4
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      id: stepid
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      with:
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        dotnet-version: 8.0.402
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    - run: echo '${{ steps.stepid.outputs.dotnet-version }}' # outputs 8.0.402
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```
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**Multiple version installation**
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In case of a multiple version installation, the `dotnet-version` output contains the latest version that is installed by the action.
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```yaml
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    - uses: actions/setup-dotnet@v4
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      id: stepid
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      with:
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        dotnet-version: | 
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          8.0.402
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          9.0.301
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    - run: echo '${{ steps.stepid.outputs.dotnet-version }}' # outputs 9.0.301
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```
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**Installation from global.json**
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When the `dotnet-version` input is used along with the `global-json-file` input, the `dotnet-version` output contains the version resolved from the `global.json`.
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```yaml
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    - uses: actions/setup-dotnet@v4
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      id: stepid
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      with:
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        dotnet-version: | 
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          8.0.402
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          9.0.301
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        global-json-file: "./global.json" # contains version 7.0.410
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    - run: echo '${{ steps.stepid.outputs.dotnet-version }}' # outputs 7.0.410
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```
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### `cache-hit`
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A boolean value to indicate an exact match was found for the cache key (follows [actions/cache](https://github.com/actions/cache#outputs))
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## Environment variables
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Some environment variables may be necessary for your particular case or to improve logging. Some examples are listed below, but the full list with complete details can be found here: https://docs.microsoft.com/en-us/dotnet/core/tools/dotnet-environment-variables
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| **Env.variable**      | **Description** | **Default value** |
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| ----------- | ----------- | ----------- |
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| DOTNET_INSTALL_DIR      |Specifies a directory where .NET SDKs should be installed by the action.|*default value for each OS* |
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| DOTNET_NOLOGO      |Removes logo and telemetry message from first run of dotnet cli|*false*|
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| DOTNET_CLI_TELEMETRY_OPTOUT   |Opt-out of telemetry being sent to Microsoft|*false*|
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| DOTNET_MULTILEVEL_LOOKUP   |Configures whether the global install location is used as a fall-back|*true*|
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| NUGET_PACKAGES |Configures a path to the [NuGet `global-packages` folder](https://learn.microsoft.com/nuget/consume-packages/managing-the-global-packages-and-cache-folders)|*default value for each OS* |
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The default values of the `DOTNET_INSTALL_DIR` and `NUGET_PACKAGES` environment variables depend on the operation system which is used on a runner:
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| **Operation system** | `DOTNET_INSTALL_DIR` | `NUGET_PACKAGES` |
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| ----------- | ----------- | ----------- |
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| **Windows** | `C:\Program Files\dotnet` | `%userprofile%\.nuget\packages` |
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| **Ubuntu** | `/usr/share/dotnet` | `~/.nuget/packages` |
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| **macOS** | `/Users/runner/.dotnet` | `~/.nuget/packages` |
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**Example usage of environment variable**:
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```yml
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build:
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  runs-on: ubuntu-latest
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  env:
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    DOTNET_INSTALL_DIR: "path/to/directory"
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    NUGET_PACKAGES: ${{ github.workspace }}/.nuget/packages
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  steps:
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    - uses: actions/checkout@main
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    - uses: actions/setup-dotnet@v4
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      with:
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        dotnet-version: '8.0.x'
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        cache: true
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```
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## Recommended permissions
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When using the `setup-dotnet` action in your GitHub Actions workflow, it is recommended to set the following permissions to ensure proper functionality:
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```yaml
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permissions:
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  contents: read # access to check out code and install dependencies
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```
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## License
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The scripts and documentation in this project are released under the [MIT License](LICENSE)
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## Contributions
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Contributions are welcome! See [Contributor's Guide](docs/contributors.md)
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