Class: MozConfig::TUI

Inherits:
Object
  • Object
show all
Defined in:
lib/mozconfig.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ TUI

Returns a new instance of TUI.



12
13
14
15
16
17
18
19
20
21
22
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
 
# File 'lib/mozconfig.rb', line 12

def initialize
  check_options

  unless File.exist?("mozconfig")
    $stderr.puts "Error: mozconfig not found."
    exit 1
  end

  # Fix whitespace-only lines and split by paragraph, then each paragraph
  # into lines
  @mozconfig = File.read("mozconfig")
    .gsub(/^\s+$/, "")
    .split(/\n{2,}/)
    .map { |p| p.lines.map(&:strip_beginning) }

  # Only paragraphs that begin with a comment are recognized as configs;
  # anything else will remain active globally.
  configs, @globals = @mozconfig.partition { |p| p.first.commented? }
  # Form configs into a hash with the names as keys
  @configs = configs.to_h { |cfg| [cfg.first.uncomment.strip, cfg[1..]] }
  # Globals won't be manipulated further so we can rejoin them
  @globals.map!(&:join)

  # Find the active config
  @active = @configs.find { |_, options| !options.first.commented? }&.first

  @prompt = TTY::Prompt.new
  @prompt.on(:keypress) do |event|
    case event.value
    when "j"
      @prompt.trigger(:keydown)
    when "k"
      @prompt.trigger(:keyup)
    when "\e"
      # Escape
      $stderr.puts "\nExiting. Configuration was not changed."
      exit 0
    end
  end
end

Instance Method Details

#run ⇒ Object 



53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
 
# File 'lib/mozconfig.rb', line 53

def run
  selection = begin
    @prompt.select(
      "Pick a configuration", @configs,
      default: @active, cycle: true
    )
  rescue TTY::Reader::InputInterrupt
    $stderr.puts "\nProcess interrupted. Closing."
    exit 130
  end

  output = "#{@globals.join("\n\n")}\n\n"

  output << @configs.map do |name, options|
    action = options == selection ? :uncomment : :comment
    "#{name.comment}\n#{options.map(&action).join}"
  end.join("\n\n")

  File.write("mozconfig", output)
end