Class: LIBUSB::CrossLibrary

Inherits:
OpenStruct
  • Object
show all
Includes:
Rake::DSL
Defined in:
lib/libusb/gem_helper.rb

Instance Method Summary collapse

Constructor Details

#initialize(ruby_platform, host_platform, libusb_dllname) ⇒ CrossLibrary

Returns a new instance of CrossLibrary.



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# File 'lib/libusb/gem_helper.rb', line 85

def initialize(ruby_platform, host_platform, libusb_dllname)
  super()

  self.ruby_platform = ruby_platform
  self.recipe = LIBUSB::LibusbRecipe.new
  recipe.host = ruby_platform
  recipe.configure_options << "--host=#{host_platform}"
  recipe.configure_options << "CC=#{host_platform}-gcc -static-libgcc" if recipe.host =~ /mingw/
  self.libusb_dll = Pathname.new(recipe.path) + libusb_dllname

  file libusb_dll do
    recipe.cook
  end

  task "libusb_dll:#{ruby_platform}" => libusb_dll

  desc 'Cross compile libusb for all targets'
  task :cross => "cross:#{ruby_platform}"

  desc "Cross compile libusb for #{ruby_platform}"
  task "cross:#{ruby_platform}" => [ "libusb_dll:#{ruby_platform}" ] do |t|
    spec = Gem::Specification::load("libusb.gemspec").dup
    spec.platform = Gem::Platform.new(ruby_platform)
    spec.extensions = []

    # Remove files unnecessary for native gems
    spec.files -= `git ls-files ext`.split("\n")
    spec.files.reject!{|f| f.start_with?('ports') }
    spec_text_files = spec.files.dup

    # Add native libusb-dll
    spec.files << "lib/#{libusb_dll.basename}"

    # MiniPortile isn't required for native gems
    spec.dependencies.reject!{|d| d.name=="mini_portile2" }

    # Generate a package for this gem
    pkg = Gem::PackageTask.new(spec) do |pkg|
      pkg.need_zip = false
      pkg.need_tar = false
      # Do not copy any files per PackageTask, because
      # we need the files from the platform specific directory
      pkg.package_files.clear
    end

    # copy files of the gem to pkg directory
    file pkg.package_dir_path => spec_text_files do
      spec_text_files.each do |fn|
        f = File.join(pkg.package_dir_path, fn)
        fdir = File.dirname(f)
        mkdir_p(fdir) if !File.exist?(fdir)
        rm_f f
        safe_ln(fn, f)
      end

      # copy libusb.dll to pkg directory
      f = "#{pkg.package_dir_path}/lib/#{libusb_dll.basename}"
      mkdir_p File.dirname(f)
      rm_f f
      safe_ln libusb_dll.realpath, f
    end

    file "lib/#{libusb_dll.basename}" => [libusb_dll]
  end
end