Class: Nexposecli::ArgParse

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

Defined Under Namespace

Classes: Error, ExtraneousArgument, InvalidArgument, MissingArgument

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(yaml_str) ⇒ ArgParse

Returns a new instance of ArgParse.



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# File 'lib/nexposecli/argparse.rb', line 16

def initialize(yaml_str)
    @opt_def        = YAML.parse(yaml_str).transform
    @opt_table      = Hash.new

end

Instance Attribute Details

#opt_table ⇒ Object

Returns the value of attribute opt_table.



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# File 'lib/nexposecli/argparse.rb', line 14

def opt_table
  @opt_table
end

Instance Method Details

#parse ⇒ Object 



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# File 'lib/nexposecli/argparse.rb', line 22

def parse

    short_to_name   = {}

    @opt_def.each { |hash|
        next if hash['comment']
        if hash['short']
            sa                  = '-' + hash['short']
            short_to_name[sa]   = hash['name']
        end
        opt_table[hash['name']] = hash['default'] if hash['default']
    }

    acount  = 0

    arg_len  = ARGV.length
    opt_name = nil
    opt_hash = nil

    while (acount <= ARGV.length)
        #puts "ARGV: " + ARGV.inspect
        #puts "acount: #{acount}"
        #puts "SW: #{ARGV[acount]}"
        str = ARGV[acount]
        #puts "1STR: #{str}"

        opt_arg = true
        case str
            when    /^--([^=]+)$/
                opt_name    = $1.gsub(/-/, '_')
                opt_hash    = @opt_def.select { |h| h['name'] == opt_name }.shift
                raise InvalidArgument, "No such opt: #{str}" unless opt_hash

                #p opt_hash
                ARGV.delete_at(acount)

                if opt_hash['required']
                    opt_arg     = ARGV.delete_at(acount)
                    #puts "ARG: '#{opt_arg}'"
                end

             when    /^--([^=]+)=(.*)/
                opt_name, opt_arg  = $1, $2
                opt_name.gsub!(/-/, '_')

                opt_hash    = @opt_def.select { |h| h['name'] == opt_name }.shift
                raise InvalidArgument, "No such opt: #{str}" unless opt_hash
                raise ExtraneousArgument, "Option '--#{opt_name}' does not take an argument" unless opt_hash['required']

                ARGV.delete_at(acount)

           when    /^-(.*)/
                #puts "*three"
                sopts = $1.split(//)
                slen  = sopts.length

                ARGV.delete_at(acount)
                sopts.each_with_index { |short_opt, i|
                    sopt        = '-' + short_opt
                    opt_name    = short_to_name[sopt]

                    raise InvalidArgument, "No such opt: #{sopt}" unless opt_name

                    opt_hash    = @opt_def.select { |h| h['name'] == opt_name }.shift

                    #p @opt_def
                    #p sopt, opt_name, opt_hash

                    raise InvalidArgument, "No such opt: #{sopt}" unless opt_hash
                   # p opt_hash

                    raise MissingArgument, "#{sopt} requires argument" if opt_hash['required'] && i != slen - 1

                    if i == slen - 1 && opt_hash['required'] 
                        opt_arg = ARGV.delete_at(acount)
                        raise MissingArgument, "#{sopt} requires argument" unless opt_arg
                    end

                    @opt_table[opt_name] = opt_arg
                    #puts "NA: #{opt_name} #{opt_arg}"
                }
                next

            else
                #puts "STR: #{str}"
                #puts "ELSE: #{ARGV}"
                #puts
                acount += 1
                next

        end

        if opt_arg == '-'               # read from stdin
            opt_arg = STDIN.readlines.map(&:strip).map { |s| s != '' ? s : nil }.compact
            opt_hash['proc'] = nil
        end

        @opt_table[opt_name] = opt_arg

        #puts "acount end : #{acount}"
        #puts
    end

    #p @opt_table

    @opt_table.keys.each { |opt_name|
        
        opt_hash    = @opt_def.select { |h| h['name'] == opt_name }.shift

        if prc = opt_hash['proc']
            @opt_table[opt_name] = @opt_table[opt_name].instance_eval(prc)
        end
    }

    #p @opt_table
    return OpenStruct.new(@opt_table)

end

#usage(usage_str = nil) ⇒ Object 



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# File 'lib/nexposecli/argparse.rb', line 141

def usage(usage_str = nil)

    if usage_str
        str = "Usage: #{usage_str}\n"
    else
        str = ""
    end

    @opt_def.each { |opt_hash|
        if opt_hash['comment']
            str << "\n" + opt_hash['comment'] + "\n\n"
        else
            long_opt    = '--' + opt_hash["name"].gsub(/_/, '-')
            short_opt   = opt_hash['short'] ? '-'  + opt_hash['short'] : "  "
            desc        = opt_hash['desc']
            req_str     = opt_hash['required'] ? " ARG" : " "
            def_str     = opt_hash['default'] ? " (def: #{opt_hash['default']})" : " "

            str << sprintf("    %-40s (%s) : %s\n", "#{long_opt}#{req_str}", short_opt, desc + def_str)
        end
    }
    return str
end