default to match that of its type argument when action = "callback". Thanks husheng (@hs3434) for bug report (#47).DESCRIPTION to suppress new CRAN check NOTE (#43).The errors raised by parse_args() (and parse_args2()) are now of class “optparse_parse_error”.
When interactive() is FALSE we now print out a usage string followed by a (less verbose) error message.
Throws a more informative error message for unknown short flags when positional_arguments=TRUE. Thanks Greg Minshall for bug report (#42).
formatter argument to OptionParser() for a function to format the usage message (#30). By default uses the new function IndentedHelpFormatter(). {optparse} also provides the new function TitledHelpFormatter(). Thanks Ni Huang for suggestion.positional_arguments=TRUE. Thanks Greg Minshall for bug report (#34).callback parameter of add_option / make_option is not NULL then the default of action is now "callback". Thanks Greg Minshall for suggestion (#35).action=="callback" in the man page for add_option and make_option. Thanks Greg Minshall for bug report (#35).action=="callback" when metavar==NULL (#29). Thanks Ni Huang for bug report.action=="callback" and positional_argument==TRUE (#28). Thanks Ni Huang for bug report.interactive() == FALSE and print_help_and_exit == TRUE then optparse will now call quit(status=0) instead of quit(status=1) after printing the help message (this matches behaviour of the python package).add_help_option=FALSE when defining an -h or --help flag. Thanks Jeff P. Bruce for bug report.getopt requirement so that empty strings are parsed correctly. Thanks Matthew Flickinger for bug report.add_help_option in OptionParser set to FALSE. Thanks to Jeff Bruce for bug report.parse_args now supports convert_hyphens_to_underscores argument which converts any hyphens to underscores when returning the list of optionsparse_args2 which wraps parse_args with positional_arguments set to TRUE and convert_hyphens_to_underscores set to TRUE.optparse should no longer give any warnings when options(warnPartialMatchArgs=TRUE). Thanks Rich FitzJohn for patch.print_help no longer throws an error if we have a default argument of length zero. Thanks Benjamin Tyner for bug report.OptionParser and OptionParserOption S4 classes are now exported. Thanks Peter Humburg for patch.positional_arguments of function parse_args now accepts one or two numeric values that denote the minimum and maximum number of supported positional arguments. Thanks Kirill Müller for patch.interactive() == TRUE then parse_args will no longer quit(status=1) after printing a help message but will instead throw an error. optparse will continue to quit(status=1) after printing a help message for non-interactive Rscripts unless print_help_and_exit == FALSE.make_option argument type="numeric" automatically cast to double. Previously users might have received an error passing negative numbers if they accidentally specified “numeric” instead of “double”.parse_args when we have options with no short flag and positional_arguments=TRUE. Thanks Miroslav Posta for bug report.description and epilogue arguments to OptionParser to allow users to add more information to generated help messages