Class: Mayl::Repl

Inherits:
Object
  • Object
show all
Includes:
Colors
Defined in:
lib/mayl/repl.rb

Overview

Public: The class responsible for reading user input, interpreting it and executing associated commands.

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Colors

#color

Constructor Details

#initialize(path) ⇒ Repl

Public: Initializes a new REPL from a given path.

path - The path to get the locales from (defaults to ‘config/locales’).



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# File 'lib/mayl/repl.rb', line 13

def initialize(path)
  path    ||= 'config/locales'
  @env    = Env.new(path)
  @parser = Parser.new(@env)
end

Instance Attribute Details

#parser ⇒ Object (readonly)

Returns the value of attribute parser.



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# File 'lib/mayl/repl.rb', line 8

def parser
  @parser
end

Instance Method Details

#start ⇒ Object

Public: Fires up the REPL that parses and executes given commands.

Returns nothing.



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# File 'lib/mayl/repl.rb', line 22

def start
  locales = @env.locales.map(&:name)
  stty_save = `stty -g`.chomp
  prompt = color(:red, "> ")
  puts color(:green, "Detected locales: #{locales.join(', ')}")

  env = @env
  Readline.completion_proc = proc { |s| Commands.autocomplete(s, env) }
  Readline.completion_append_character = ''

  begin
    while input = Readline.readline(prompt, true)
      begin
        value = @parser.parse(input.chomp).execute
        @env.last_value = value
        @env.commit
        prompt = color(:red, [@env.namespace, '> '].reject(&:empty?).join(' '))
      rescue => e
        print "Error: #{e.message}"
      ensure
        print "\n"
      end
    end
  rescue Interrupt
    system("stty", stty_save)
    exit
  end
end