rvm.rake

MYPROJECT_RUBIES = {
  'ruby-1.8.7-p302'    => {:alias => 'dms187', :odbc => '0.99991'},
}

namespace :rvm do

  task :setup do
    unless @rvm_setup
      rvm_lib_path = "#{`echo $rvm_path`.strip}/lib"
      $LOAD_PATH.unshift(rvm_lib_path) unless $LOAD_PATH.include?(rvm_lib_path)
      require 'rvm'
      require 'tmpdir'
      @rvm_setup = true
    end
  end

  namespace :install do

    task :all => [:setup,:rubies,:odbc,:gems]

    task :rubies => :setup do
      installed_rubies = RVM.list_strings
      MYPROJECT_RUBIES.keys.each do |rubie|
        if installed_rubies.include?(rubie)
          puts "info: Rubie #{rubie} already installed."
        else
          with_my_environment_vars do
            good_msg = "info: Rubie #{rubie} installed."
            bad_msg = "Failed #{rubie} install! Check RVM logs here: #{RVM.path}/log/#{rubie}"
            puts "info: Rubie #{rubie} installation inprogress. This could take awhile..."
            RVM.install(rubie,rvm_install_options) ? puts(good_msg) : abort(bad_msg)
          end
        end
        RVM.alias_create MYPROJECT_RUBIES[rubie][:alias], "#{rubie}@dms"
      end
    end

    task :odbc => :setup do
      rvm_each_rubie do
        odbc = "ruby-odbc-#{myproject_current_rubie_info[:odbc]}"
        RVM.chdir(Dir.tmpdir) do
          RVM.run "rm -rf #{odbc}*"
          puts "info: RubyODBC downloading #{odbc}..."
          RVM.run "curl -O http://www.ch-werner.de/rubyodbc/#{odbc}.tar.gz"
          puts "info: RubyODBC extracting clean work directory..."
          RVM.run "tar -xf #{odbc}.tar.gz"
          RVM.chdir("#{odbc}/ext") do
            puts "info: RubyODBC configuring..."
            RVM.ruby 'extconf.rb', "--with-odbc-dir=#{rvm_odbc_dir}"
            puts "info: RubyODBC make and installing for #{rvm_current_name}..."
            RVM.run "make && make install"
          end
        end
      end
    end

    task :gems => :setup do
      puts "info: Installing our app gems."
      rvm_each_rubie do
        myproject_gem_specs.each { |spec| rvm_install_gem(spec) }
      end
    end

  end

  task :remove => :setup do
    myproject_rubies.each { |rubie| RVM.remove(rubie) }
  end

end


def myproject_rubies
  MYPROJECT_RUBIES.keys.map{ |rubie| "#{rubie}@dms" }
end

def myproject_current_rubie_info
  MYPROJECT_RUBIES[rvm_current_rubie_name]
end

def myproject_gem_specs
  [
    ['rails','2.3.2'],
  ]
end

def rvm_each_rubie
  myproject_rubies.each do |rubie|
    RVM.use(rubie)
    yield
  end
ensure
  RVM.reset_current!
end

def rvm_current_rubie_name
  rvm_current_name.sub('@dms','')
end

def rvm_current_name
  RVM.current.expanded_name
end

def rvm_gem_available?(spec)
  gem, version = spec
  RVM.ruby_eval("require 'rubygems' ; print Gem.available?('#{gem}','#{version}')").stdout == 'true'
end

def rvm_install_gem(spec)
  gem, version = spec
  if rvm_gem_available?(spec)
    puts "info: Gem #{gem}-#{version} already installed in #{rvm_current_name}."
  else
    puts "info: Installing gem #{gem}-#{version} in #{rvm_current_name}..."
    puts RVM.perform_set_operation(:gem,'install',gem,'-v',version).stdout
  end
end

def for_macports?
  `uname`.strip == 'Darwin' && `which port`.present?
end

def rvm_install_options
  {}
end

def my_environment_vars
  if for_macports?
    {'CC' => '/usr/bin/gcc-4.2',
     'CFLAGS' => '-O2 -arch x86_64',
     'LDFLAGS' => '-L/opt/local/lib -arch x86_64',
     'CPPFLAGS' => '-I/opt/local/include'}
  else
    {}
  end
end

def rvm_odbc_dir
  for_macports? ? '/opt/local' : '/usr/local'
end

def set_environment_vars(vars)
  vars.each { |k,v| ENV[k] = v }
end

def with_my_environment_vars
  my_vars = my_environment_vars
  current_vars = my_vars.inject({}) { |cvars,kv| k,v = kv ; cvars[k] = ENV[k] ; cvars }
  set_environment_vars(my_vars)
  yield
ensure
  set_environment_vars(current_vars)
end