build-and-push-package.yml

name: Build and Push NuGet Package

on:
  push:
    tags:
    - 'production-*'

env:
  DOTNET_VERSION: '8.0.x'

jobs:
  build-and-test:
    runs-on: ubuntu-latest
    permissions:
      packages: write
      contents: write
    steps:
    - uses: actions/checkout@v4
      with:
        ref: ${{ github.ref }}
        fetch-depth: 0 # Shallow clones disabled for a better relevancy of SC analysis

    - name: Setup .NET
      uses: actions/setup-dotnet@v4
      with:
        dotnet-version: ${{ env.DOTNET_VERSION }}

    - name: Set up curl and jq
      run: sudo apt-get install -y curl jq

    - name: Check for custom version in commit message or check the feed for the latest version and increment it
      id: check_custom_version
      run: |
        # Search the last 10 commits for the version update indicator
        COMMIT_HASH=$(git log -n 10 --pretty=format:"%H %s" | grep -P '\(#update package version to \d+\.\d+\.\d+\)' | grep -oP '^\w+' | head -n 1)

        if [[ -n "$COMMIT_HASH" ]]; then
          echo "Found commit with version update indicator: $COMMIT_HASH"
      
          # Check if the commit is already tagged
          if git rev-parse "processed-nuget-version-${COMMIT_HASH}" >/dev/null 2>&1; then
            echo "This commit has already been processed for version update. Skipping."
          else
            # Extract the version from the commit message
            CUSTOM_VERSION=$(git show -s --format=%s $COMMIT_HASH | grep -oP '\(#update package version to \K([0-9]+\.[0-9]+\.[0-9]+)')

            if [[ -n "$CUSTOM_VERSION" ]]; then
              echo "Using custom version: $CUSTOM_VERSION"
              echo "NEW_VERSION=$CUSTOM_VERSION" >> $GITHUB_ENV

              # Tag the commit to prevent reprocessing
              git tag "processed-nuget-version-${COMMIT_HASH}"
              git push origin "processed-nuget-version-${COMMIT_HASH}"
            else
              echo "Failed to extract version from commit message. Exiting."
              exit 1
            fi
          fi
        fi

        if [[ -z "$CUSTOM_VERSION" ]]; then
          echo "No unprocessed custom version found in the last 10 commits. Proceeding to fetch and increment the latest version from the feed."
      
          # Fetch the latest version and increment the  version
          PACKAGE_ID="Dfe.PersonsApi.Client"
          FEED_URL="https://nuget.pkg.github.com/DFE-Digital/query?q=$PACKAGE_ID"
          LATEST_VERSION=$(curl -s -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" "$FEED_URL" | jq -r '.data[0].version')

          if [[ -z "$LATEST_VERSION" || "$LATEST_VERSION" == "null" ]]; then
            echo "No existing version found in the feed. Defaulting to version 1.0.0"
            NEW_VERSION="1.0.0"
          else
            echo "Latest version is $LATEST_VERSION"
            IFS='.' read -r -a VERSION_PARTS <<< "$LATEST_VERSION"
            NEW_VERSION="${VERSION_PARTS[0]}.${VERSION_PARTS[1]}.$((VERSION_PARTS[2] + 1))"
            echo "Incrementing to new version: $NEW_VERSION"
          fi

          echo "NEW_VERSION=$NEW_VERSION" >> $GITHUB_ENV
        fi
      shell: /usr/bin/bash -e {0}

    - name: Build, pack and publish
      working-directory: Dfe.PersonsApi.Client
      run: |
        dotnet build -c Release
        dotnet pack -c Release -p:PackageVersion=${{ env.NEW_VERSION }} --output .
        dotnet nuget push "*.nupkg" --api-key ${{ secrets.GITHUB_TOKEN }} --source https://nuget.pkg.github.com/DFE-Digital/index.json