• Junio C Hamano's avatar
    parse-options: detect attempt to add a duplicate short option name · af465af8
    Junio C Hamano authored
    It is easy to overlook an already assigned single-letter option name
    and try to use it for a new one.  Help the developer to catch it
    before such a mistake escapes the lab.
    
    This retroactively forbids any short option name (which is defined
    to be of type "int") outside the ASCII printable range.  We might
    want to do one of two things:
    
     - tighten the type of short_name member to 'char', and further
       update optbug() to protect it against doing "'%c'" on a funny
       value, e.g. negative or above 127.
    
     - drop the check (even the "duplicate" check) for an option whose
       short_name is either negative or above 255, to allow clever folks
       to take advantage of the fact that such a short_name cannot be
       parsed from the command line and the member can be used to store
       some extra information.
    Helped-by: default avatarRené Scharfe <l.s.r@web.de>
    Signed-off-by: default avatarJunio C Hamano <gitster@pobox.com>
    af465af8
t1502-rev-parse-parseopt.sh 4.64 KB