Class: Envo::ScriptParser

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

Instance Method Summary collapse

Constructor Details

#initialize(opts) ⇒ ScriptParser

Returns a new instance of ScriptParser.



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# File 'lib/envo/script_parser.rb', line 5

def initialize(opts)
  @known_cmds = {}
  @known_opts = opts
end

Instance Method Details

#add_cmd(name, parse_func) ⇒ Object 



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# File 'lib/envo/script_parser.rb', line 9

def add_cmd(name, parse_func)
  raise Envo::Error "cmd #{name} is already added to parser" if @known_cmds[name]
  @known_cmds[name] = parse_func
end

#parse(lines) ⇒ Object 



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# File 'lib/envo/script_parser.rb', line 13

def parse(lines)
  result = ParseResult.new

  lines.each_with_index do |line, li|
    li += 1
    line.strip!
    next if line.empty?
    next if line[0] == '#' # comment

    line_opts = if line[0] == '{' # opts pack
      i = line.index('}')
      raise Envo::Error.new "#{li}: malformed options pack" if !i
      opts = line[1...i].split(',')
      line = line[i+1..]
      opts
    else
      []
    end

    raise Envo::Error.new "#{li}: missing command" if line.empty?

    tokens = []
    begin
      tokens = CSV::parse_line(line, col_sep: ' ').compact
    rescue
      puts "AAAAAAA: #{line.inspect}"
      raise Envo::Error.new "#{li}: malformed line"
    end

    raise Envo::Error.new "#{li}: missing command" if tokens.empty?
    cmd = tokens.shift
    raise Envo::Error.new "#{li}: unknown command '#{cmd}'" if !@known_cmds[cmd]
    parsed_cmd = @known_cmds[cmd].(cmd, tokens, line_opts)

    cmd_opts = {}
    parsed_cmd.opts.each do |opt|
      cmd_opts.merge! @known_opts.parse_script(opt)
    end
    parsed_cmd.opts = cmd_opts

    result.cmds << parsed_cmd
  end
  result
end