[Scons-users] Multiple AddOption with arguments

[Keith F Prussing]

I am trying to debug an error I get when using multiple calls to AddOption.  Consider the following SConstruct

    AddOption("--one")
    AddOption("--two", nargs=2)
    print(GetOption("one"), GetOption("two"))

When I run SCons I get the following

    $ scons -Q
    (None, None)
    scons: `.' is up to date.

    $ scons -Q --one=a
    ('a', None)
    scons: `.' is up to date.

    $ scons -Q --one=a --two b c
    usage: scons [OPTION] [TARGET] ...

    SCons Error: --two option requires 2 arguments

    $ scons -Q --two b c
    usage: scons [OPTION] [TARGET] ...

    SCons Error: --two option requires 2 arguments

    $ scons -Q --two b c --one=a
    usage: scons [OPTION] [TARGET] ...

    SCons Error: --two option requires 2 arguments

I am trying to figure out why I cannot add the second option.  When I remove the first call to AddOption, the second (AddOption("two")) does the right thing.  If I remove the `nargs` option and use the `=' as described in thread [1], the error goes away.  Why would this be the case?

I noted from the User's Manual that the parser is a subclass of the `optparse.Parser`, and the man page states AddOption supports the options for `optparse.add_option`, so I thought `nargs` would work.  I tried walking the code with --debug=pdb, but I could not locate which call to AddOption registered the options.  Any thoughts on where I should continue my search on why this is happening?

Thanks,

Keith

[1]: https://pairlist4.pair.net/pipermail/scons-users/2014-September/002989.html

-- 
Keith F Prussing