The local source finds gems in the current directory for fulfilling dependencies.

Methods
#
Instance Public methods
<=>(other)

Local sorts before Gem::Source and after Gem::Source::Installed

Source: show 

# File lib/rubygems/source/local.rb, line 16
def <=> other
  case other
  when Gem::Source::Installed,
       Gem::Source::Lock then
    -1
  when Gem::Source::Local then
    0
  when Gem::Source then
    1
  else
    nil
  end
end