Class: Optitron::Parser

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Parser

Returns a new instance of Parser.



6
7
8
9
10
11
12
 
# File 'lib/optitron/parser.rb', line 6

def initialize
  @options = []
  @commands = []
  @args = []
  @short_opts = {}
  @help = Help.new(self)
end

Instance Attribute Details

#args ⇒ Object (readonly)

Returns the value of attribute args.



4
5
6
 
# File 'lib/optitron/parser.rb', line 4

def args
  @args
end

#commands ⇒ Object (readonly)

Returns the value of attribute commands.



4
5
6
 
# File 'lib/optitron/parser.rb', line 4

def commands
  @commands
end

#options ⇒ Object (readonly)

Returns the value of attribute options.



4
5
6
 
# File 'lib/optitron/parser.rb', line 4

def options
  @options
end

#short_opts ⇒ Object (readonly)

Returns the value of attribute short_opts.



4
5
6
 
# File 'lib/optitron/parser.rb', line 4

def short_opts
  @short_opts
end

#target ⇒ Object

Returns the value of attribute target.



3
4
5
 
# File 'lib/optitron/parser.rb', line 3

def target
  @target
end

Instance Method Details

#help ⇒ Object 



14
15
16
 
# File 'lib/optitron/parser.rb', line 14

def help
  @help.generate
end

#parse(argv = ARGV) ⇒ Object 



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
52
53
54
 
# File 'lib/optitron/parser.rb', line 18

def parse(argv = ARGV)
  tokens = Tokenizer.new(self, argv).tokens
  response = Response.new(self, tokens)
  options = @options 
  args = @args
  unless @commands.empty?
    potential_cmd_toks = tokens.select { |t| t.respond_to?(:lit) }
    if cmd_tok = potential_cmd_toks.find { |t| @commands.assoc(t.lit) }
      tokens.delete(cmd_tok)
      response.command = cmd_tok.lit
      options += @commands.assoc(cmd_tok.lit).last.options
      args = @commands.assoc(cmd_tok.lit).last.args
    elsif !potential_cmd_toks.empty? && @target.respond_to?(:command_missing)
      command = potential_cmd_toks.first.lit
      response.command = 'command_missing'
      @commands << [response.command, Option::Cmd.new(response.command)]
      @commands.assoc(response.command).last.options.insert(-1, *tokens.select { |t| !t.respond_to?(:lit) }.map { |t|
        t.is_a?(Tokenizer::Named) ?
          Option::Opt.new(t.name, nil, :short_name => t.name) :
          Option::Opt.new(t.name, nil, :type => (t.value ? :string : :boolean))
      })
      @commands.assoc(response.command).last.args <<
        Option::Arg.new('command', 'Command name', :type => :string) <<
        Option::Arg.new('args', 'Command arguments', :type => :greedy)
      options += @commands.assoc(response.command).last.options
      args = @commands.assoc(response.command).last.args
    else
      potential_cmd_toks.first ?
        response.add_error('an unknown command', potential_cmd_toks.first.lit) :
        response.add_error('unknown command')
    end
  end
  parse_options(tokens, options, response)
  parse_args(tokens, args, response)
  response.validate
  response
end

#parse_args(tokens, args, response) ⇒ Object 



68
69
70
 
# File 'lib/optitron/parser.rb', line 68

def parse_args(tokens, args, response)
  args.each { |arg| arg.consume(response, tokens) }
end

#parse_options(tokens, options, response) ⇒ Object 



56
57
58
59
60
61
62
63
64
65
66
 
# File 'lib/optitron/parser.rb', line 56

def parse_options(tokens, options, response)
  options.each do |opt|
    response.params[opt.name] = opt.default if opt.has_default?
    if opt_tok = tokens.find { |tok| opt.match?(tok) }
      opt_tok_index = tokens.index(opt_tok)
      opt.consume(response, tokens)
    elsif opt.required?
      response.add_error("required", opt.name)
    end
  end
end