def write_source_file
      paths = []

      # Remove C:/
      install_dir = project.install_dir.split("/")[1..-1].join("/")

      # Grab all parent paths
      Pathname.new(install_dir).ascend do |path|
        paths << path.to_s
      end

      # Create the hierarchy
      hierarchy = paths.reverse.inject({}) do |hash, path|
        hash[File.basename(path)] = path.gsub(/[^[:alnum:]]/, "").upcase + "LOCATION"
        hash
      end

      # The last item in the path MUST be named PROJECTLOCATION or else space
      # robots will cause permanent damage to you and your family.
      hierarchy[hierarchy.keys.last] = "PROJECTLOCATION"

      # If the path hierarchy is > 1, the customizable installation directory
      # should default to the second-to-last item in the hierarchy. If the
      # hierarchy is smaller than that, then just use the system drive.
      wix_install_dir = if hierarchy.size > 1
                          hierarchy.to_a[-2][1]
                        else
                          "WINDOWSVOLUME"
                        end

      render_template(resource_path("source.wxs.erb"),
        destination: "#{staging_dir}/source.wxs",
        variables: {
          name: project.package_name,
          friendly_name: project.friendly_name,
          maintainer: project.maintainer,
          hierarchy: hierarchy,
          fastmsi: fast_msi,
          wix_install_dir: wix_install_dir,
        }
      )
    end
def write_source_file
      paths = []

      # Remove C:/
      install_dir = project.install_dir.split("/")[1..-1].join("/")

      # Grab all parent paths
      Pathname.new(install_dir).ascend do |path|
        paths << path.to_s
      end

      # Create the hierarchy
      hierarchy = paths.reverse.inject({}) do |hash, path|
        hash[File.basename(path)] = path.gsub(/[^[:alnum:]]/, "").upcase + "LOCATION"
        hash
      end

      # The last item in the path MUST be named PROJECTLOCATION or else space
      # robots will cause permanent damage to you and your family.
      hierarchy[hierarchy.keys.last] = "PROJECTLOCATION"

      # If the path hierarchy is > 1, the customizable installation directory
      # should default to the second-to-last item in the hierarchy. If the
      # hierarchy is smaller than that, then just use the system drive.
      wix_install_dir = if hierarchy.size > 1
                          hierarchy.to_a[-2][1]
                        else
                          "WINDOWSVOLUME"
                        end

      render_template(resource_path("source.wxs.erb"),
        destination: "#{staging_dir}/source.wxs",
        variables: {
          name: project.package_name,
          friendly_name: project.friendly_name,
          maintainer: project.maintainer,
          hierarchy: hierarchy,
          fastmsi: fast_msi,
          wix_install_dir: wix_install_dir,
        }
      )
    end
Write the source file into the staging directory.

 @return [void]