require 'rake/clean'

# Adapted from Hoe.
def paragraphs_of(path, *paragraphs)
  File.read(path).split(/\n\n+/).values_at(*paragraphs).join("\n\n")
end

def in_dir(path)
  original_dir = Dir.pwd
  Dir.chdir(path)
  yield
ensure
  Dir.chdir(original_dir)
end

begin
  require 'jeweler'
  Jeweler::Tasks.new do |gemspec|
    gemspec.name = 'rglpk'
    gemspec.summary = paragraphs_of('README.md', 1)
    gemspec.description = paragraphs_of('README.md', 1..3)
    gemspec.homepage = 'http://rglpk.rubyforge.org/'
    gemspec.rubyforge_project = 'rglpk'

    gemspec.authors = ['Alex Gutteridge', 'William Taysom']
    gemspec.email = ['alexg@kuicr.kyoto-u.ac.jp', 'wtaysom@gmail.com']

    gemspec.extensions << 'ext/extconf.rb'
    gemspec.require_paths << 'ext'
    gemspec.rdoc_options << '--exclude' << '.'
  end
  Jeweler::GemcutterTasks.new
rescue LoadError
  puts 'Jeweler not available. Install it with: gem install jeweler'
end

SHARED_LIBRARY_EXTENSION = RUBY_PLATFORM.include?('darwin') ? 'bundle' : 'so'
EXTENSION = 'ext/glpk_wrapper.' + SHARED_LIBRARY_EXTENSION

desc 'Use extconf.rb and make to build the extension.'
task build_extension: EXTENSION

file EXTENSION => 'ext/glpk_wrapper.c' do
  in_dir('ext') do
    system('ruby extconf.rb')
    system('make')
  end
end

CLEAN.include('ext/Makefile', 'ext/conftest.dSYM', 'ext/mkmf.log',
              'ext/glpk_wrapper.bundle', 'ext/glpk_wrapper.o')

file 'ext/glpk_wrapper.c' => 'swig/glpk.i' do
  in_dir('swig') do
    system('autoconf')
    system('configure')
    system('make wrap')
  end
end

CLEAN.include('swig/Makefile', 'swig/autom4te.cache', 'swig/config.log',
              'swig/config.status', 'swig/configure', 'swig/glpk_wrapper.c')

CLOBBER.include('ext/glpk_wrapper.c', 'rglpk.gemspec')

desc 'Run Test::Unit tests.'
task test: :build_extension do
  system('ruby test/test_all.rb')
end