Method: Olib.install

Defined in:
lib/Olib.rb

.install(g, v = nil) ⇒ Object 



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# File 'lib/Olib.rb', line 46

def Olib.install(g, v=nil)
  if !which("gem") then
    echo "Olib could not detect the `gem` executable in your $PATH"
    echo "when you installed Ruby did you forget to click the `modify $PATH` box?"
    raise Exception
  end

  begin
    unless v.nil?
      # make it a true instance of Gem::Version so we can compare
      raise UpdateGemError if Gem.loaded_specs[g].version <  Gem::Version.new(v)
      gem g, v
    end

    Olib.reload g

  ##
  ## rescue missing gem and reload after install
  ##
  rescue LoadError
    echo "installing #{g}..."
    version = "--version '#{v}'" unless v.nil?
    worked = system("gem install #{g} #{version} --no-ri --no-rdoc")
    unless worked then raise "Could not install #{g} gem" end
    Olib.reload g
    echo "... installed #{g}!"

  ##
  ## rescue from too old of a gem version for a Ruby environment
  ##
  rescue UpdateGemError
    echo "updating #{g}@#{Gem.loaded_specs[g].version} => #{v}..."
    version = "--version '#{v}'" unless v.nil?
    worked = system("gem install #{g} #{version} --no-ri --no-rdoc")
    unless worked then raise "Could not install #{g} gem" end
    Olib.reload g
    echo "... updated #{g} to #{v}!"
  end
end