name: Install MinGW
description: Install MinGW-w64

inputs:
  platform:
    description: Target platform
    required: false
    default: x64
  cygwin:
    description: Install inside Cygwin
    required: false
    default: 0
  static:
    description: Enable static linking workaround
    required: False
    default: 1

outputs:
  prefix:
    description: Cross-compilation toolchain prefix
    value: '${{ steps.setup.outputs.prefix }}'
  gcc:
    description: gcc binary name
    value: '${{ steps.setup.outputs.gcc }}'
  gxx:
    description: g++ binary name
    value: '${{ steps.setup.outputs.gxx }}'
  windres:
    description: windres binary name
    value: '${{ steps.setup.outputs.windres }}'

runs:
  using: composite
  steps:
    - id: setup
      run: |
        $x64 = '${{ inputs.platform }}' -eq 'x64'
        $cygwin = '${{ inputs.cygwin }}' -eq '1'
        $static_workaround = '${{ inputs.static }}' -eq '1'

        $prefix32 = 'i686-w64-mingw32'
        $prefix64 = 'x86_64-w64-mingw32'
        $prefix = if ($x64) { $prefix64 } else { $prefix32 }

        if ('${{ runner.os }}' -eq 'Linux') {
            # -------------------------------------------------------------
            # Ubuntu
            # -------------------------------------------------------------
            sudo apt install mingw-w64

            # Make the compilers use the POSIX threading model, whatever that
            # is.  Without it, the stuff from <mutex>/<thread>/etc. doesn't
            # compile.  Of course, it makes the binaries depend on
            # libwinpthread-1.dll, but what you gonna do?

            sudo update-alternatives --set "$prefix32-gcc" "/usr/bin/$prefix32-gcc-posix"
            sudo update-alternatives --set "$prefix32-g++" "/usr/bin/$prefix32-g++-posix"
            sudo update-alternatives --set "$prefix64-gcc" "/usr/bin/$prefix64-gcc-posix"
            sudo update-alternatives --set "$prefix64-g++" "/usr/bin/$prefix64-g++-posix"

            if ($static_workaround) {
                sudo rm `
                    "/usr/$prefix32/lib/libpthread.dll.a" `
                    "/usr/$prefix32/lib/libwinpthread.dll.a" `
                    "/usr/$prefix64/lib/libpthread.dll.a" `
                    "/usr/$prefix64/lib/libwinpthread.dll.a"
            }
        } elseif ('${{ runner.os }}' -eq 'Windows') {
            if ($cygwin) {
                # -------------------------------------------------------------
                # Cygwin
                # -------------------------------------------------------------
                $cygwin_pkg = if ($x64) { 'mingw64-x86_64-gcc-g++' } else { 'mingw64-i686-gcc-g++' }
                choco.exe install -y --no-progress --source=cygwin $cygwin_pkg

                if ($static_workaround) {
                    $cygwin_lib = Join-Path C: tools cygwin usr $prefix sys-root mingw lib
                    Remove-Item (Join-Path $cygwin_lib 'libpthread.dll.a')
                    Remove-Item (Join-Path $cygwin_lib 'libwinpthread.dll.a')
                }
            } else {
                # -------------------------------------------------------------
                # Windows
                # -------------------------------------------------------------
                $mingw32 = 'mingw32'
                $mingw64 = 'mingw64'
                $mingw = if ($x64) { $mingw64 } else { $mingw32 }

                $mingw_install = Join-Path C: ProgramData chocolatey lib mingw tools install

                $mingw32_root = Join-Path $mingw_install $mingw32
                $mingw64_root = Join-Path $mingw_install $mingw64
                $mingw_root = Join-Path $mingw_install $mingw

                $mingw32_bin = Join-Path $mingw32_root bin
                $mingw64_bin = Join-Path $mingw64_root bin
                $mingw_bin = Join-Path $mingw_root bin

                $mingw_lib = Join-Path $mingw_root $prefix lib

                if ($x64) {
                    # Assuming the 64-bit version is installed.  If 32-bit
                    # version is installed, we won't detect that.  But it's not
                    # _that_ important, and we save a lot of time.
                    choco.exe install -y --no-progress mingw
                    echo $mingw64_bin >> $env:GITHUB_PATH
                } else {
                    # Assuming the 64-bit version is installed.
                    choco.exe uninstall -y --no-progress mingw
                    choco.exe install -y --no-progress --x86 mingw
                    echo $mingw32_bin >> $env:GITHUB_PATH
                }

                if ($static_workaround) {
                    Remove-Item (Join-Path $mingw_lib 'libpthread.dll.a')
                    Remove-Item (Join-Path $mingw_lib 'libwinpthread.dll.a')
                }
            }
        }

        $gcc = $prefix + '-gcc'
        $gxx = $prefix + '-g++'
        $windres = $prefix = '-windres'

        echo "::set-output name=prefix::$prefix"
        echo "::set-output name=gcc::$gcc"
        echo "::set-output name=gxx::$gxx"
        echo "::set-output name=windres::$windres"
      shell: pwsh

branding:
  icon: star
  color: green