require 'rbconfig'
# setup_extension will create the needed task
# add wrap all them into 'compile'
# also will set a task named 'native' that will change the supplied
# Gem::Specification and inject into the pre compiled binaries.
# if no gem_spec is supplied, no native task get defined.
def setup_extension(extension_name, gem_spec = nil)
# use the DLEXT for the true extension name
ext_name = "#{extension_name}.#{RbConfig::CONFIG['DLEXT']}"
# we need lib
directory 'lib'
# verify if the extension is in a folder
unless File.directory?("ext/#{extension_name}")
# the extension is in the root of ext.
file "lib/#{ext_name}" => ['lib', "ext/#{ext_name}"] do
cp "ext/#{ext_name}", "lib/#{ext_name}"
end
# getting this file is part of the compile task
desc "Compile the extension"
task :compile => ["lib/#{ext_name}"]
file "ext/#{ext_name}" => FileList["ext/Makefile", "ext/*.c", "ext/*.h"] do
# Visual C make utility is named 'nmake', MinGW conforms GCC 'make' standard.
make_cmd = RUBY_PLATFORM =~ /mswin/ ? 'nmake' : 'make'
Dir.chdir('ext') do
sh make_cmd
end
end
file "ext/Makefile" => "ext/extconf.rb" do
Dir.chdir('ext') do
ruby 'extconf.rb'
end
end
else
raise "Pending: Multiple extensions not implemented yet."
end
unless Rake::Task.task_defined?('native')
if gem_spec
desc "Build the extensions into native binaries."
task :native => [:compile] do |t|
# use CURRENT platform instead of RUBY
gem_spec.platform = Gem::Platform::CURRENT
# clear the extension (to avoid RubyGems firing the build process)
gem_spec.extensions.clear
# add the precompiled binaries to the list of files
# (taken from compile task dependency)
gem_spec.files += Rake::Task['compile'].prerequisites
end
end
end
end
