Class: Yap::Shell::Repl

Inherits:
Object
  • Object
show all
Defined in:
lib/yap/shell/repl.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(world: nil) ⇒ Repl

Returns a new instance of Repl.



12
13
14
15
16
17
18
19
20
21
 
# File 'lib/yap/shell/repl.rb', line 12

def initialize(world:nil)
  @world = world
  @editor= world.editor

  Treefell['shell'].puts "installing default keybindings"
  install_default_keybindings

  Treefell['shell'].puts "installing default tab completion"
  install_default_tab_completion_proc
end

Instance Attribute Details

#editor ⇒ Object (readonly)

Returns the value of attribute editor.



10
11
12
 
# File 'lib/yap/shell/repl.rb', line 10

def editor
  @editor
end

Instance Method Details

#on_input(&blk) ⇒ Object 



23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
 
# File 'lib/yap/shell/repl.rb', line 23

def on_input(&blk)
  @blk = blk

  @world.editor.on_read_line do |event|
    line_read = event[:payload][:line]
    Treefell['shell'].puts "editor line read: #{line_read.inspect}"
    # editor.history = true?
    line = line_read << "\n"
    begin
      @blk.call(line)
      @world.editor.redraw_prompt
    rescue Yap::Shell::Parser::Lexer::NonterminatedString,
      Yap::Shell::Parser::Lexer::LineContinuationFound => ex
      Treefell['shell'].puts "rescued #{ex}, asking user for more input"
      line << read_another_line_of_input
      retry
    rescue ::Yap::Shell::CommandUnknownError => ex
      Treefell['shell'].puts "rescued #{ex}, telling user"
      puts "  CommandError: #{ex.message}"
    rescue ::Yap::Shell::Parser::ParseError => ex
      Treefell['shell'].puts "rescued #{ex}, telling user"
      puts "  Parse error: #{ex.message}"
    ensure
      @world.editor.reset_line
    end

    ensure_process_group_controls_the_tty
    @world.refresh_prompt
  end
end