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setup-dotnet

GitHub Actions Status

This action sets up a .NET CLI environment for use in actions by:

  • optionally downloading and caching a version(s) of dotnet by SDK version(s) and adding to PATH
  • registering problem matchers for error output
  • setting up authentication to private package sources like GitHub Packages

Note: GitHub hosted runners have some versions of the .NET SDK preinstalled. Installed versions are subject to change. Please refer to the documentation software installed on github hosted runners for .NET SDK versions that are currently available.

Usage

See action.yml

Basic:

steps:
- uses: actions/checkout@v3
- uses: actions/setup-dotnet@v3
  with:
    dotnet-version: '3.1.x'
- run: dotnet build <my project>

Multiple version installation:

steps:
- uses: actions/checkout@v3
- name: Setup dotnet
  uses: actions/setup-dotnet@v3
  with:
    dotnet-version: | 
      3.1.x
      5.0.x
- run: dotnet build <my project>

Note: In case multiple versions are installed, the latest .NET version will be used by default unless another version is specified in the global.json file.

Supported version syntax

The dotnet-version input supports following syntax:

  • A.B.C (e.g 6.0.400, 7.0.100-preview.7.22377.5) - installs exact version of .NET SDK
  • A.B or A.B.x (e.g. 3.1, 3.1.x) - installs the latest patch version of .NET SDK on the channel 3.1, including prerelease versions (preview, rc)
  • A or A.x (e.g. 3, 3.x) - installs the latest minor version of the specified major tag, including prerelease versions (preview, rc)

Using the dotnet-quality input

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.

Note: dotnet-quality input can be used only with .NET SDK version in 'A.B', 'A.B.x', 'A' and 'A.x' formats where the major version is higher than 5. In other cases, dotnet-quality input will be ignored.

steps:
- uses: actions/checkout@v3
- uses: actions/setup-dotnet@v3
  with:
    dotnet-version: '6.0.x'
    dotnet-quality: 'preview'
- run: dotnet build <my project>

Using the global-json-file input

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.

Note: In case both dotnet-version and global-json-file inputs are used, versions from both inputs will be installed.

steps:
- uses: actions/checkout@v3
- uses: actions/setup-dotnet@v3
  with:
    global-json-file: csharp/global.json
- run: dotnet build <my project>
  working-directory: csharp

Matrix Testing

Using setup-dotnet it's possible to use matrix syntax to install several versions of .NET SDK:

jobs:
  build:
    runs-on: ubuntu-latest
    strategy:
      matrix:
        dotnet: [ '2.1.x', '3.1.x', '5.0.x' ]
    name: Dotnet ${{ matrix.dotnet }} sample
    steps:
      - uses: actions/checkout@v3
      - name: Setup dotnet
        uses: actions/setup-dotnet@v3
        with:
          dotnet-version: ${{ matrix.dotnet }}
      - run: dotnet build <my project>

Setting up authentication for nuget feeds

Github Package Registry (GPR)

steps:
- uses: actions/checkout@v3
- uses: actions/setup-dotnet@v3
  with:
    dotnet-version: '3.1.x'
    source-url: https://nuget.pkg.github.com/<owner>/index.json
  env:
    NUGET_AUTH_TOKEN: ${{secrets.GITHUB_TOKEN}}
- run: dotnet build <my project>
- name: Create the package
  run: dotnet pack --configuration Release <my project>
- name: Publish the package to GPR
  run: dotnet nuget push <my project>/bin/Release/*.nupkg

Azure Artifacts

- uses: actions/setup-dotnet@v3
  with:
    source-url: https://pkgs.dev.azure.com/<your-organization>/_packaging/<your-feed-name>/nuget/v3/index.json
  env:
    NUGET_AUTH_TOKEN: ${{secrets.AZURE_DEVOPS_PAT}} # Note, create a secret with this name in Settings
- name: Publish the package to Azure Artifacts
  run: dotnet nuget push <my project>/bin/Release/*.nupkg

nuget.org

- uses: actions/setup-dotnet@v3
  with:
    dotnet-version: 3.1.x
- name: Publish the package to nuget.org
  run: dotnet nuget push */bin/Release/*.nupkg -k $NUGET_AUTH_TOKEN -s https://api.nuget.org/v3/index.json
  env:
    NUGET_AUTH_TOKEN: ${{ secrets.NUGET_TOKEN }}

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.

Outputs and environment variables

Outputs

dotnet-version

Using the dotnet-version output it's possible to get the installed by the action .NET SDK version.

Single version installation

In case of a single version installation, the dotnet-version output contains the version that is installed by the action.

    - uses: actions/setup-dotnet@v3
      id: cp310
      with:
        dotnet-version: 3.1.422
    - run: echo '${{ steps.cp310.outputs.dotnet-version }}' # outputs 3.1.422

Multiple version installation

In case of a multiple version installation, the dotnet-version output contains the latest version that is installed by the action.

    - uses: actions/setup-dotnet@v3
      id: cp310
      with:
        dotnet-version: | 
          3.1.422
          5.0.408
    - run: echo '${{ steps.cp310.outputs.dotnet-version }}' # outputs 5.0.408

Installation from global.json

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.

    - uses: actions/setup-dotnet@v3
      id: cp310
      with:
        dotnet-version: | 
          3.1.422
          5.0.408
        global-json-file: "./global.json" # contains version 2.2.207
    - run: echo '${{ steps.cp310.outputs.dotnet-version }}' # outputs 2.2.207

Environment variables

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

Env.variable Description Default value
DOTNET_INSTALL_DIR Specifies a directory where .NET SDKs should be installed by the action. default value for each OS
DOTNET_NOLOGO Removes logo and telemetry message from first run of dotnet cli false
DOTNET_CLI_TELEMETRY_OPTOUT Opt-out of telemetry being sent to Microsoft false
DOTNET_MULTILEVEL_LOOKUP Configures whether the global install location is used as a fall-back true

The default value of the DOTNET_INSTALL_DIR environment variable depends on the operation system which is used on a runner:

Operation system Default value
Windows C:\Program Files\dotnet
Ubuntu /usr/share/dotnet
macOS /Users/runner/.dotnet

Example usage:

build:
  runs-on: ubuntu-latest
  env:
    DOTNET_INSTALL_DIR: "path/to/directory"
  steps:
    - uses: actions/checkout@main
    - uses: actions/setup-dotnet@v3
      with:
        dotnet-version: '3.1.x'

License

The scripts and documentation in this project are released under the MIT License

Contributions

Contributions are welcome! See Contributor's Guide