gfortran-on-windows.yaml

name: GFortran on Windows
run-name: minpack compiled with GFortran from MSYS2 on Windows
on:
  push:
    paths-ignore:
      - "**/*.md"
      - "doc/**"
  pull_request:
    paths-ignore:
      - "**/*.md"
      - "doc/**"

jobs:
  build:
    runs-on: windows-latest
    strategy:
      matrix:
        USE_DOWNLOAD: ['OFF']
        CMAKE_BUILD_TYPE: ['Release', 'Debug']
        LIBRARY_KIND: ['SHARED', 'STATIC']
        MSYS2_CONFIG: [{ sys: mingw64, env: x86_64, fc: gfortran.exe }, { sys: ucrt64, env: ucrt-x86_64, fc: gfortran.exe }]

    env:
      # Fortran compiler + C compiler + GNU Make
      MSYS2_PACKAGES_TO_INSTALL: "mingw-w64-${{ matrix.MSYS2_CONFIG.env }}-fc mingw-w64-${{ matrix.MSYS2_CONFIG.env }}-make"

    steps:

      - name: Restore MSYS2 (${{ matrix.MSYS2_CONFIG.env }}) packages
        id: restore-msys2-packages
        uses: actions/cache/restore@0057852bfaa89a56745cba8c7296529d2fc39830 # v4.3.0
        with:
          path: 'C:\msys64\tmp\*-${{ matrix.MSYS2_CONFIG.env }}-*'
          key: minpack-builder-${{ matrix.MSYS2_CONFIG.env }}

      # Here, instead of installing packages in the conventional way,
      # we grab a list of mirrors for the environment (${{ matrix.MSYS2_CONFIG.env }}),
      # then each package content is downloaded separetely from a different mirror.
      # After all packages have been downloaded to disk, we install them.
      #
      # This workaround takes place to avoid a kind of "flooding" on the main MSYS2
      # servers, due the amount of content we have to download in parallel builds.
      - name: Download Fortran compiler + GNU Make
        if: ${{ steps.restore-msys2-packages.outputs.cache-hit != 'true' }}
        shell: pwsh
        run: |
          C:\msys64\usr\bin\bash.exe -lc "pacman -S ${{ env.MSYS2_PACKAGES_TO_INSTALL }} --print > /tmp/url.list"
          C:\msys64\usr\bin\bash.exe -lc "for e in `$(cat /tmp/url.list); do echo `$(basename `$e); done" > $env:RUNNER_TEMP\packages.list

          $raw_mirrors = New-Object 'System.Collections.Generic.List[string]';
          Get-Content C:\msys64\etc\pacman.d\mirrorlist.${{ matrix.MSYS2_CONFIG.sys }} |
            Where-Object { $_ -match "Server\s+=\s+https" } |
            Foreach-Object {
              $raw_mirrors.Add($_.Substring($_.IndexOf("https")));
            }
          $mirrors = $raw_mirrors.ToArray();
          
          $ProgressPreference = 'SilentlyContinue';
          [System.IO.File]::ReadAllLines((Get-Item $env:RUNNER_TEMP\packages.list).FullName) | ForEach-Object {

            [System.Security.Cryptography.RandomNumberGenerator]::Shuffle[string]($mirrors);

            $package = $_;
            $retries = 0;
            $success = $false;
            $max_retries = $mirrors.Length;
            $connection_timeout = 30;
            $read_timeout = 1;

            while ((-not $success) -and ($retries -lt $max_retries))
            {
              $mirror = $mirrors[$retries];

              $uri = "${mirror}${package}";

              if ($retries -gt 0)
              {
                C:\msys64\usr\bin\bash.exe -lc "echo -e '\e[32mRetry[\e[33m$retries\e[37m / \e[31m$max_retries\e[32m] >> \e[37mDownloading \e[35m$package\e[37m from \e[36m$uri\e[37m'";
              }
              else
              {
                Write-Host "Downloading $package from $uri";
              }

              try
              {
                Invoke-WebRequest -Uri $uri -MaximumRetryCount 0 -ConnectionTimeoutSeconds $connection_timeout -OperationTimeoutSeconds $read_timeout -OutFile C:\msys64\tmp\$package;
                $success = $true;
              }
              catch
              {
                C:\msys64\usr\bin\bash.exe -lc "echo -e '\e[33mFailed to download $package from $mirror\e[37m'";
                $retries++;
              }
            }

            if (-not $success)
            {
              Write-Host "Failed to download $package";
              exit 1;
            }
          }

      - name: Save MSYS2 packages on cache
        if: ${{ steps.restore-msys2-packages.outputs.cache-hit != 'true' }}
        uses: actions/cache/save@0057852bfaa89a56745cba8c7296529d2fc39830 # v4.3.0
        with:
          path: 'C:\msys64\tmp\*-${{ matrix.MSYS2_CONFIG.env }}-*'
          key: minpack-builder-${{ matrix.MSYS2_CONFIG.env }}

      - name: Install MSYS2 packages
        run: |
          C:\msys64\usr\bin\bash.exe -lc "pacman -U /tmp/*.pkg.tar.zst --noconfirm"

      - name: Add MSYS2 tools to system environment PATH, and set FC environment variables
        shell: pwsh
        run: |
          Add-Content $env:GITHUB_PATH "C:\msys64\${{ matrix.MSYS2_CONFIG.sys }}\bin"
          Add-Content $env:GITHUB_ENV "FC=${{ matrix.MSYS2_CONFIG.fc }}"

      - name: Restore assets
        id: restore-assets
        uses: actions/cache/restore@0057852bfaa89a56745cba8c7296529d2fc39830 # v4.3.0
        with:
          path: assets-cache
          key: minpack-assets
          enableCrossOsArchive: true

      - name: Checkout assets
        uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
        if: ${{ matrix.USE_DOWNLOAD=='OFF' && steps.restore-assets.outputs.cache-hit != 'true' }}
        with:
          ref: assets-ci-v1
          path: assets

      - name: Place minpack sources in the cache directory
        if: ${{ matrix.USE_DOWNLOAD=='OFF' && steps.restore-assets.outputs.cache-hit != 'true' }}
        shell: pwsh
        run: |
          New-Item "assets-cache" -ItemType Directory | Out-Null;
          foreach ($current_file in "disclaimer", "chkder.f", "dogleg.f", "dpmpar.f", "enorm.f", "fdjac1.f", "fdjac2.f", "hybrd1.f", "hybrd.f", "hybrj1.f", "hybrj.f", "lmder1.f", "lmder.f", "lmdif1.f", "lmdif.f", "lmpar.f", "lmstr1.f", "lmstr.f", "qform.f", "qrfac.f", "qrsolv.f", "r1mpyq.f", "r1updt.f", "rwupdt.f")
          {
            $filePath = Join-Path -Path "assets" -ChildPath $current_file;
            Copy-Item -Path $filePath -Destination "assets-cache";
          }

      - name: Save assets
        if: ${{ matrix.USE_DOWNLOAD=='OFF' && steps.restore-assets.outputs.cache-hit != 'true' }}
        uses: actions/cache/save@0057852bfaa89a56745cba8c7296529d2fc39830 # v4.3.0
        with:
          path: assets-cache
          key: minpack-assets
          enableCrossOsArchive: true

      - name: Checkout repository to minpack-builder directory
        uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
        with:
          path: minpack-builder

      - name: Place minpack sources in the correct directory for minpack-builder
        if: ${{ matrix.USE_DOWNLOAD=='OFF' }}
        shell: pwsh
        run: |
          foreach ($current_file in "disclaimer", "chkder.f", "dogleg.f", "dpmpar.f", "enorm.f", "fdjac1.f", "fdjac2.f", "hybrd1.f", "hybrd.f", "hybrj1.f", "hybrj.f", "lmder1.f", "lmder.f", "lmdif1.f", "lmdif.f", "lmpar.f", "lmstr1.f", "lmstr.f", "qform.f", "qrfac.f", "qrsolv.f", "r1mpyq.f", "r1updt.f", "rwupdt.f")
          {
            $filePath = Join-Path -Path "assets-cache" -ChildPath $current_file;
            Copy-Item -Path $filePath -Destination "minpack-builder";
          }

      - name: Set environment variables to build and install directories
        shell: pwsh
        run: |
          Add-Content $env:GITHUB_ENV "BUILDDIR=$env:RUNNER_TEMP\build"
          Add-Content $env:GITHUB_ENV "INSTALLDIR=$env:RUNNER_TEMP\install-gfortran"

      - name: Configure the build of minpack
        shell: cmd
        run: |
          IF "${{ matrix.LIBRARY_KIND }}"=="SHARED" (
            cmake -G "MinGW Makefiles" -DBUILD_SHARED_LIBS=ON -DBUILD_STATIC_LIBS=OFF -DCMAKE_BUILD_TYPE=${{ matrix.CMAKE_BUILD_TYPE }} -DUSE_DOWNLOAD=${{ matrix.USE_DOWNLOAD }} --install-prefix %INSTALLDIR% -S minpack-builder -B %BUILDDIR%
          ) ELSE IF "${{ matrix.LIBRARY_KIND }}"=="STATIC" (
            cmake -G "MinGW Makefiles" -DBUILD_SHARED_LIBS=OFF -DBUILD_STATIC_LIBS=ON -DCMAKE_BUILD_TYPE=${{ matrix.CMAKE_BUILD_TYPE }} -DUSE_DOWNLOAD=${{ matrix.USE_DOWNLOAD }} --install-prefix %INSTALLDIR% -S minpack-builder -B %BUILDDIR%
          ) ELSE (
            ECHO Unknown LIBRARY_KIND in the build matrix
            EXIT /B 1
          )

      - name: Build minpack
        shell: cmd
        run: cmake --build %BUILDDIR% --config ${{ matrix.CMAKE_BUILD_TYPE }}

      - name: Install minpack
        shell: cmd
        run: cmake --install %BUILDDIR% --config ${{ matrix.CMAKE_BUILD_TYPE }}