Class: Rexical::Cmd
- Inherits:
-
Object
- Object
- Rexical::Cmd
- Defined in:
- lib/rexical/rexcmd.rb
Constant Summary collapse
- OPTIONS =
<<-EOT o -o --output-file <outfile> file name of output [<filename>.rb] o -s --stub - append stub code for debug o -i --ignorecase - ignore char case o -C --check-only - syntax check only o - --independent - independent mode o - --matcheos - allow match against end of string o -d --debug - print debug information o -h --help - print this message and quit o - --version - print version and quit o - --copyright - print copyright and quit EOT
Instance Method Summary collapse
-
#initialize ⇒ Cmd
constructor
A new instance of Cmd.
- #run ⇒ Object
- #usage(msg = nil) ⇒ Object
Constructor Details
#initialize ⇒ Cmd
Returns a new instance of Cmd.
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# File 'lib/rexical/rexcmd.rb', line 64 def initialize @status = 2 @cmd = File.basename($0, ".rb") tmp = OPTIONS.lines.collect do |line| next if /\A\s*\z/ === line # disp, sopt, lopt, takearg, doc _, sopt, lopt, takearg, _ = line.strip.split(/\s+/, 5) a = [] a.push lopt unless lopt == '-' a.push sopt unless sopt == '-' a.push takearg == '-' ? GetoptLong::NO_ARGUMENT : GetoptLong::REQUIRED_ARGUMENT a end getopt = GetoptLong.new(*tmp.compact) getopt.quiet = true @opt = {} begin getopt.each do |name, arg| raise GetoptLong::InvalidOption, "#{@cmd}: #{name} given twice" if @opt.key? name @opt[name] = arg.empty? ? true : arg end rescue GetoptLong::AmbigousOption, GetoptLong::InvalidOption, GetoptLong::MissingArgument, GetoptLong::NeedlessArgument usage $!. end usage if @opt['--help'] if @opt['--version'] puts "#{@cmd} version #{Rexical::VERSION}" exit 0 end if @opt['--copyright'] puts "#{@cmd} version #{Rexical::VERSION}" puts "#{Rexical::Copyright} <#{Rexical::Mailto}>" exit 0 end end |
Instance Method Details
#run ⇒ Object
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# File 'lib/rexical/rexcmd.rb', line 33 def run @status = 1 usage 'no grammar file given' if ARGV.empty? usage 'too many grammar files given' if ARGV.size > 1 filename = ARGV[0] rex = Rexical::Generator.new(@opt) begin rex.grammar_file = filename rex.read_grammar rex.parse if @opt['--check-only'] $stderr.puts "syntax ok" return 0 end rex.write_scanner @status = 0 rescue Rexical::ParseError, Errno::ENOENT msg = $!.to_s unless /\A\d/ === msg msg[0,0] = ' ' end $stderr.puts "#{@cmd}:#{rex.grammar_file}:#{rex.lineno}:#{msg}" ensure exit @status end end |
#usage(msg = nil) ⇒ Object
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# File 'lib/rexical/rexcmd.rb', line 106 def usage( msg=nil ) f = $stderr f.puts "#{@cmd}: #{msg}" if msg f.print <<-EOT Usage: #{@cmd} [options] <grammar file> Options: EOT OPTIONS.each_line do |line| next if line.strip.empty? if /\A\s*\z/ === line f.puts next end disp, sopt, lopt, takearg, doc = line.strip.split(/\s+/, 5) if disp == 'o' sopt = nil if sopt == '-' lopt = nil if lopt == '-' opt = [sopt, lopt].compact.join(',') takearg = nil if takearg == '-' opt = [opt, takearg].compact.join(' ') f.printf "%-27s %s\n", opt, doc end end exit @status end |