def heat_command
      if fast_msi
        <<-EOH.split.join(" ").squeeze(" ").strip
          heat.exe file "#{project.name}.zip"
          -cg ProjectDir
          -dr INSTALLLOCATION
          -nologo -sfrag -srd -sreg -gg
          -out "project-files.wxs"
        EOH
      else
        <<-EOH.split.join(" ").squeeze(" ").strip
          heat.exe dir "#{windows_safe_path(project.install_dir)}"
            -nologo -srd -sreg -gg -cg ProjectDir
            -dr PROJECTLOCATION
            -var "var.ProjectSourceDir"
            -out "project-files.wxs"
        EOH
      end
    end
def heat_command
      if fast_msi
        <<-EOH.split.join(" ").squeeze(" ").strip
          heat.exe file "#{project.name}.zip"
          -cg ProjectDir
          -dr INSTALLLOCATION
          -nologo -sfrag -srd -sreg -gg
          -out "project-files.wxs"
        EOH
      else
        <<-EOH.split.join(" ").squeeze(" ").strip
          heat.exe dir "#{windows_safe_path(project.install_dir)}"
            -nologo -srd -sreg -gg -cg ProjectDir
            -dr PROJECTLOCATION
            -var "var.ProjectSourceDir"
            -out "project-files.wxs"
        EOH
      end
    end
Get the shell command to run heat in order to create a
 a WIX manifest of project files to be packaged into the MSI

 @return [String]