begin
require "readline"
rescue LoadError
end
class Bundler::Thor
module LineEditor
class Readline < Basic
def self.available?
Object.const_defined?(:Readline)
end
def readline
if echo?
::Readline.completion_append_character = nil
# Ruby 1.8.7 does not allow Readline.completion_proc= to receive nil.
if complete = completion_proc
::Readline.completion_proc = complete
end
::Readline.readline(prompt, add_to_history?)
else
super
end
end
private
def add_to_history?
options.fetch(:add_to_history, true)
end
def completion_proc
if use_path_completion?
proc { |text| PathCompletion.new(text).matches }
elsif completion_options.any?
proc do |text|
completion_options.select { |option| option.start_with?(text) }
end
end
end
def completion_options
options.fetch(:limited_to, [])
end
def use_path_completion?
options.fetch(:path, false)
end
class PathCompletion
attr_reader :text
private :text
def initialize(text)
@text = text
end
def matches
relative_matches
end
private
def relative_matches
absolute_matches.map { |path| path.sub(base_path, "") }
end
def absolute_matches
Dir[glob_pattern].map do |path|
if File.directory?(path)
"#{path}/"
else
path
end
end
end
def glob_pattern
"#{base_path}#{text}*"
end
def base_path
"#{Dir.pwd}/"
end
end
end
end
end
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