Usage: r2p [options] [ruby_file] [php_file]

General options:
    -R, --runtime-path path          set path to the PHP runtime
    -e, --execute ruby_program       compile specified ruby_program to standard
                                     output (ruby_file and php_file ignored)
    -w                               enable verbose mode
    -h, --help                       write this help
    -v, --version                    write version information

Debug options:
    -a, --ast                        print only AST
    -c, --color                      colorize printed AST
    -l, --show-lines                 show source lines in printed AST
    -y, --yydebug                    enable parser debug dumps
