Rakefile

# configurations
BIN_DIR = File.expand_path("~/bin/")
INSTALL_DIR = File.expand_path("~/bin/rubys/")

P185 = "p231"
P186 = "p369"
P187 = "p174"
P191 = "p243"
P192 = "preview1"
JRUBY_VER = "1.3.0"

TOP_DIR = File.dirname(__FILE__)
def cd(dir=TOP_DIR)
  Dir.chdir(File.expand_path(dir, TOP_DIR))
end

def make_install(name, dir=nil)
  cd(dir || name)
  sh "./configure " +
       "--prefix='#{INSTALL_DIR}/#{name}' " +
       "--program-suffix='#{name.sub(/ruby/, '')}' "+
       "--disable-install-doc "
  sh "make"
  sh "make install"
end

def symlink(name)
  cd BIN_DIR
#  sh "ln -s " +
#       "'#{INSTALL_DIR}/#{name}/bin/#{name}' " +
#       "'#{BIN_DIR}/#{name.sub(/-p\d+$/, '')}' "
  sh "ln -s " +
       "'#{INSTALL_DIR}/#{name}/bin/#{name}' " +
       "'#{BIN_DIR}/#{name}' "
end

task :cruby => [:ruby186, :ruby187, :ruby191]

desc "install ruby-1.8.5 #{P185}"
task :ruby185 => ["#{BIN_DIR}/ruby-1.8.5-#{P185}"]

desc "install ruby-1.8.6 #{P186}"
task :ruby186 => ["#{BIN_DIR}/ruby-1.8.6-#{P186}"]

desc "install ruby-1.8.7 #{P187}"
task :ruby187 => ["#{BIN_DIR}/ruby-1.8.7-#{P187}"]

desc "install ruby-1.9.1 #{P191}"
task :ruby191 => ["#{BIN_DIR}/ruby-1.9.1-#{P191}"]

desc "install ruby-1.9.2 #{P192}"
task :ruby192 => ["#{BIN_DIR}/ruby-1.9.2-#{P192}"]

# install
rule /\// => [lambda{|s| File.basename(s)}] do |t|
  make_install t.source
  symlink t.source
end

# unpack
rule /ruby-.*-p([^.]*)$/ => [lambda{|s| "#{s}.tar.bz2"}] do |t|
  cd
  sh "tar xvf #{t.source}"
end

# download
rule ".bz2" do |t|
  sh "wget ftp://core.ring.gr.jp/pub/lang/ruby/#{t.name}"
end

# Ruby trunk ----------------------------------------------------------------------

desc "install ruby trunk"
task :rubytrunk => ["#{BIN_DIR}/#{ENV['AS'] || 'ruby-trunk'}"] do
  unless File.exist?("ruby-trunk")
    cd
    sh "git clone --depth 1 git://github.com/shyouhei/ruby.git ruby-trunk"
  end

  cd "ruby-trunk"
  sh "git pull"

  sh "make distclean" if File.exist?("Makefile")
  sh "autoconf"
  name = ENV["AS"] || "ruby-trunk"
  make_install(name, "ruby-trunk")
  symlink(name)
end

# Rubinius ----------------------------------------------------------------------

desc "install rubinius"
task :rubinius => "#{BIN_DIR}/rubinius"

file "#{BIN_DIR}/rubinius" => "rubinius-git" do
  cd "rubinius-git"
  sh "git pull"
  sh "rake"
  sh "ln -s #{TOP_DIR}/bin/rbx #{BIN_DIR}/rubinius"
end

file "rubinius-git" do
  cd
  sh "git clone --depth 1 git://github.com/evanphx/rubinius.git rubinius-git"
end

# MacRuby ----------------------------------------------------------------------
#
#desc "install macruby"
#task :macruby => "#{BIN_DIR}/macruby"
#
#file "#{BIN_DIR}/macruby" => "macruby-git" do
#  cd "macruby-git"
#  sh "git pull"
#  sh "RUBYOPT='' DESTDIR='#{INSTALL_DIR}/macruby' rake"
#  sh "RUBYOPT='' DESTDIR='#{INSTALL_DIR}/macruby' rake install"
#  #sh "ln -s #{TOP_DIR}/bin/rbx #{BIN_DIR}/macruby"
#end
#
#file "macruby-git" do
#  cd
#  sh "git clone --depth 1 git://github.com/masterkain/macruby.git macruby-git"
#end

# JRuby ----------------------------------------------------------------------

desc "install jruby"
task :jruby => "#{BIN_DIR}/jruby"

file "#{BIN_DIR}/jruby" => "jruby-#{JRUBY_VER}" do
  sh "ln -s #{TOP_DIR}/jruby-#{JRUBY_VER}/bin/jruby #{BIN_DIR}/jruby"
end

file "jruby-#{JRUBY_VER}" do
  cd
  sh "wget http://dist.codehaus.org/jruby/#{JRUBY_VER}/jruby-bin-#{JRUBY_VER}.tar.gz"
  sh "tar xvf jruby-bin-#{JRUBY_VER}.tar.gz"
end