build.yml

# build.yml v1.6
# 1.6:
#     - Use --getProperty:Version instead of Nito.ProjProps.
#     - Updates: acitons/checkout@v4
# 1.5:
#     - Use bash syntax
#     - Avoid set-output
#     - Updates: actions/cache@v3, actions/checkout@v3, actions/upload-artifact@v3, codecov/codecov-action@v3, WyriHaximus/github-action-get-previous-tag@v1
#     - Work around SDK bug (https://github.com/dotnet/sdk/issues/17461)
#     - Use pre-release ProjProps.
# 1.4 - Avoid set-env.
# 1.3 - Include tag workflow in this file.
# 1.2 - Define DOTNET_SKIP_FIRST_TIME_EXPERIENCE/NUGET_XMLDOC_MODE.
# 1.1 - Use actions/cache@v2.
# 1.0 - Initial release.

name: Build

on:
  - push

env:
  CI: 'true'
  DOTNET_CLI_TELEMETRY_OPTOUT: 'true'
  DOTNET_SKIP_FIRST_TIME_EXPERIENCE: 'true'
  NUGET_XMLDOC_MODE: 'skip'

jobs:
  build:
    runs-on: ubuntu-latest
    steps:

    - name: Dump context
      env:
        CONTEXT: ${{ toJson(github) }}
      run: |
        echo "Context is available above"

    - name: Determine cache fallbacks
      if: github.event_name != 'push'
      id: cache_fallbacks
      run: |
        echo "name=nuget::nuget-" >> $GITHUB_OUTPUT

    - name: Checkout
      uses: actions/checkout@v4
      with:
        fetch-depth: 0 # Required by WyriHaximus/github-action-get-previous-tag@v1

    - name: Cache nuget
      uses: actions/cache@v3
      with:
        path: ~/.nuget/packages
        key: nuget-${{ hashFiles('**/*.csproj') }}-${{ hashFiles('**/*.props') }}
        restore-keys: ${{ steps.cache_fallbacks.outputs.nuget }}
      
    - name: Get existing tag
      id: existingtag
      uses: WyriHaximus/github-action-get-previous-tag@v1
      continue-on-error: true

    - name: Get current version
      run: |
        echo "NEWTAG=v$(dotnet build $(find src -name *.csproj | head --lines=1) --getProperty:Version)"
        echo "NEWTAG=v$(dotnet build $(find src -name *.csproj | head --lines=1) --getProperty:Version)" >> $GITHUB_ENV

    - name: Build
      run: |
        dotnet build --configuration Release
        dotnet test --configuration Release --no-build --collect:"XPlat Code Coverage"
        dotnet pack --configuration Release --no-build

    - name: Upload package artifacts
      uses: actions/upload-artifact@v3
      with:
        name: nuget-packages
        path: |
          **/*.nupkg
          **/*.snupkg

    - name: Publish code coverage
      uses: codecov/codecov-action@v3

    - name: Publish packages
      if: env.NEWTAG != steps.existingtag.outputs.tag
      run: |
        dotnet nuget push **/*.nupkg --source https://api.nuget.org/v3/index.json --skip-duplicate --api-key ${{ secrets.NUGET_API_KEY }}

    - name: Create tag
      if: env.NEWTAG != steps.existingtag.outputs.tag
      run: |
        git tag ${{ env.NEWTAG }}
        git push --tags