build.yml

name: Build QuantLib DLL

on:
  push:
    branches: [main]
  pull_request:
    branches: [main]
  workflow_dispatch:
    inputs:
      quantlib_version:
        description: "QuantLib version"
        required: true
        default: "1.41"
      boost_version:
        description: "Boost version"
        required: true
        default: "1.87.0"
      build_tests:
        description: "Build and include QuantLib test suite"
        type: boolean
        default: true
      run_tests:
        description: "Run the QuantLib test suite after building"
        type: boolean
        default: false
      create_release:
        description: "Create a GitHub Release with the zip asset"
        type: boolean
        default: false

concurrency:
  group: build-${{ github.ref }}
  cancel-in-progress: true

jobs:
  build:
    name: "Build QuantLib ${{ inputs.quantlib_version || '1.41' }} DLL"
    runs-on: windows-2022

    env:
      QL_VERSION: ${{ inputs.quantlib_version || '1.41' }}
      BOOST_VERSION: ${{ inputs.boost_version || '1.87.0' }}

    steps:
      - uses: actions/checkout@v4

      - name: Build QuantLib DLL
        shell: pwsh
        run: |
          $buildTests = "${{ inputs.build_tests }}" -ne "false"
          $runTests   = "${{ inputs.run_tests }}"   -eq "true"
          $buildTestsFlag = if ($buildTests) { "-BuildTests" } else { "" }
          $runTestsFlag   = if ($runTests)   { "-RunTests"   } else { "" }
          $cmd = "scripts/Build-QuantLibDLL.ps1" +
            " -QuantLibVersion $env:QL_VERSION" +
            " -BoostVersion $env:BOOST_VERSION" +
            " -InstallDir ${{ runner.temp }}\quantlib-install" +
            " -TempDir ${{ runner.temp }}\quantlib-build" +
            " -PackageZip" +
            " -ZipOutputDir ${{ github.workspace }}" +
            " $buildTestsFlag $runTestsFlag"
          Write-Host "Running: $cmd"
          Invoke-Expression $cmd

      - name: Show build errors
        if: failure()
        shell: pwsh
        run: |
          $buildDir = "${{ runner.temp }}\quantlib-build\QuantLib-${{ env.QL_VERSION }}\build"
          Write-Host "==> Searching for build error logs..."
          if (Test-Path $buildDir) {
            foreach ($logName in @("build-library.log", "build-testsuite.log")) {
              $logPath = Join-Path $buildDir $logName
              if (Test-Path $logPath) {
                Write-Host "`n==> $logName (last 100 lines):"
                Get-Content $logPath -Tail 100 | Write-Host
              }
            }
          }

      - name: Verify zip
        shell: pwsh
        run: |
          $zip = "QuantLib-${{ env.QL_VERSION }}-x64-dll.zip"
          $size = [math]::Round((Get-Item $zip).Length / 1MB, 1)
          Write-Host "==> $zip ($size MB)"

      - uses: actions/upload-artifact@v4
        with:
          name: "QuantLib-${{ env.QL_VERSION }}-x64-dll"
          path: "QuantLib-${{ env.QL_VERSION }}-x64-dll.zip"

  release:
    name: Create GitHub Release
    needs: build
    if: >-
      github.event_name == 'workflow_dispatch' &&
      inputs.create_release
    runs-on: ubuntu-24.04
    permissions:
      contents: write

    env:
      QL_VERSION: ${{ inputs.quantlib_version || '1.41' }}

    steps:
      - uses: actions/checkout@v4

      - name: Move tag to current commit
        run: |
          TAG="v${{ env.QL_VERSION }}"
          git tag -f "$TAG"
          git push origin "$TAG" --force

      - uses: actions/download-artifact@v4
        with:
          name: "QuantLib-${{ env.QL_VERSION }}-x64-dll"

      - name: Delete existing release assets
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          TAG="v${{ env.QL_VERSION }}"
          echo "Checking for existing release with tag $TAG..."
          RELEASE_ID=$(gh api repos/${{ github.repository }}/releases/tags/$TAG \
            --jq '.id' 2>/dev/null || true)
          if [ -n "$RELEASE_ID" ]; then
            echo "Found release $RELEASE_ID — deleting existing assets..."
            gh api repos/${{ github.repository }}/releases/$RELEASE_ID/assets \
              --jq '.[].id' | while read ASSET_ID; do
                echo "  Deleting asset $ASSET_ID"
                gh api -X DELETE repos/${{ github.repository }}/releases/assets/$ASSET_ID
              done
          else
            echo "No existing release for $TAG — nothing to clean up."
          fi

      - name: Create or update release
        uses: softprops/action-gh-release@v2
        with:
          tag_name: "v${{ env.QL_VERSION }}"
          name: "QuantLib ${{ env.QL_VERSION }} (Windows x64 DLL)"
          body: |
            Pre-built QuantLib ${{ env.QL_VERSION }} as a Windows x64 DLL.

            **Contents of `QuantLib-${{ env.QL_VERSION }}-x64-dll.zip`:**
            - `QuantLib-${{ env.QL_VERSION }}/bin/QuantLib-x64-mt.dll` — Runtime DLL
            - `QuantLib-${{ env.QL_VERSION }}/lib/QuantLib-x64-mt.lib` — Import library
            - `QuantLib-${{ env.QL_VERSION }}/include/ql/` — QuantLib headers (patched for DLL)
            - `boost_${{ inputs.boost_version }}/` — Boost ${{ inputs.boost_version }} headers

            **Build details:**
            - Visual Studio 2022 (MSVC)
            - `BUILD_SHARED_LIBS=ON`, `CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS=ON`
            - MSVC DLL CRT (`/MD`)

            **Usage:**
            ```powershell
            Expand-Archive QuantLib-${{ env.QL_VERSION }}-x64-dll.zip -DestinationPath C:\quantlib-deps
            ```
          files: "QuantLib-${{ env.QL_VERSION }}-x64-dll.zip"
          draft: false
          prerelease: false