Class: CommandParser

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

Overview

wrapper class for options parser

Instance Method Summary collapse

Constructor Details

#initialize(config) ⇒ CommandParser

pass the config so we can access



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# File 'lib/command_parser.rb', line 6

def initialize config
    @config = config
    @options = options
    @help_called = false
end

Instance Method Details

#collect(arguments) ⇒ Object

collect the command arguments via the option parser class



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# File 'lib/command_parser.rb', line 18

def collect(arguments)
    # build the class options from options parser instance
    parser = OptionParser.new do |opts|
        opts.banner = "Options for output grasshopper"
        opts.separator "\n"
        opts.separator "Specifics:"

        opts.on('-m [name]', '--motivate [name]', String, "# Output a motivational quote") do |m|
            @options[:method] = 'motivate'
            @options[:arguments] = { author: m }
        end            

        opts.on('-w [glob1,glob2] ', '--watch [glob1,glob2]', Array, '# Watch files & output a message on file/folder change event') do |w|
            @options[:method] = 'watch'
            @options[:arguments] = { files: w }
        end

        opts.on_tail('-h', '--help', '# Output command line help options') do 
            @help_called = true
            puts opts
            exit(1)
        end
    end

    # set the options from calling the parser if there are any exceptions
    # we need to catch them and output the help message
    begin
        parser.parse!(arguments)    
    rescue Exception => e
        if not(e.kind_of? SystemExit)
            puts parser
            exit(1)    
        end
    end

    # if no valid methods were set we can't execute and therefore we exit and
    # put the parser message to the console
    if @options[:method].nil?
        puts parser if not @help_called
        exit(1)
    end

    #return the options
    @options
end

#options ⇒ Object

default options



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# File 'lib/command_parser.rb', line 13

def options
    { method: nil, arguments: nil}
end

#output_authors ⇒ Object

output a prett list of authors



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# File 'lib/command_parser.rb', line 65

def output_authors
    authors = []

    @config['quotes'].each do |author|
        authors << author[0]
    end

    authors.join(', ')
end