Re: [Haskell-cafe] Re: Re: A question regarding cmdargs package
Ben Franksen schrieb: Neil Mitchell wrote: This makes me curious. What's the use case where you want to allow the user to pass arguments on the command line, but you don't want that user to be able to use '--help' to find out what arguments may be passed? I wanted to create a clone of an existing program that had no help option and instead gave the help output if it saw an invalid option. I find it very annoying if a program floods my terminal with a help page, when I just misspelled something. A short descriptive message that points to the mistake would be of more help for me. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Re: Re: A question regarding cmdargs package
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 10/13/10 06:07 , Henning Thielemann wrote: Ben Franksen schrieb: I wanted to create a clone of an existing program that had no help option and instead gave the help output if it saw an invalid option. I find it very annoying if a program floods my terminal with a help page, when I just misspelled something. A short descriptive message that points to the mistake would be of more help for me. He mentioned that he has backward compatibility constraints. In an ideal world - -- brandon s. allbery [linux,solaris,freebsd,perl] allb...@kf8nh.com system administrator [openafs,heimdal,too many hats] allb...@ece.cmu.edu electrical and computer engineering, carnegie mellon university KF8NH -BEGIN PGP SIGNATURE- Version: GnuPG v2.0.10 (Darwin) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAky1xmUACgkQIn7hlCsL25WWpwCdFM209D0Y0FfhBwgeOnfyuzJa SoYAnAhNuo1uhFE6hNErRG8QdIPmQmB6 =XTVN -END PGP SIGNATURE- ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] Re: Re: A question regarding cmdargs package
Neil Mitchell wrote: This makes me curious. What's the use case where you want to allow the user to pass arguments on the command line, but you don't want that user to be able to use '--help' to find out what arguments may be passed? I wanted to create a clone of an existing program that had no help option and instead gave the help output if it saw an invalid option. When you don't want to bother defining the help options/descriptions? :p (alternatively, you may wish to provide a more full-featured version like what darcs does by using a pager) You can already do this with CmdArgs. If you use cmdArgsMode/process it returns a structure populated to say what to do next (i.e. display a help message), but you are welcome to do something different, or do what it says in a different way. However, I can see some people might want to remove help entirely, so I'll try and find a balance. The point here was not so much removing --help, but rather that I want to have control over the 'standard' options (help,version,verbosity) in the same way as for the rest. My program might not have a version, so why offer --version? Or maybe I want a different name for it because the -V is already used for something else, which I cannot change for backwards compatibility. I might want another name for --help, for instance -h. The standard -? does not work in all shells/configurations and --help might look strange if all other options are of the one-dash-one-character sort. I would also like to configure the help text for the standard options, for instance for i18n or because I like starting with a lower case letter or... Cheers Ben ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] Re: Re: A question regarding cmdargs package
Joachim Breitner wrote: Am Dienstag, den 12.10.2010, 16:42 +1100 schrieb Ivan Lazar Miljenovic: On 12 October 2010 16:32, Magnus Therning mag...@therning.org wrote: This makes me curious. What's the use case where you want to allow the user to pass arguments on the command line, but you don't want that user to be able to use '--help' to find out what arguments may be passed? When you don't want to bother defining the help options/descriptions? :p note that people expect cmd --help to at least do nothing. So if your program is called launchMissiles, please make it at least spit out a message like your evil dictator was too lazy to write a help message when it is called with --help. (That is if you are sharing your program. Not sure if you should share launchMissiles at all.) launchMissiles = putStrLn Boom! (just kidding :) BTW another cool feature of an auto-magic option parsing lib is the GNU standard -- (arguments after this are not to be treated as options). Cheers Ben ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Re: Re: A question regarding cmdargs package
The point here was not so much removing --help, but rather that I want to have control over the 'standard' options (help,version,verbosity) in the same way as for the rest. My program might not have a version, so why offer --version? Or maybe I want a different name for it because the -V is already used for something else, which I cannot change for backwards compatibility. I might want another name for --help, for instance -h. The standard -? does not work in all shells/configurations and --help might look strange if all other options are of the one-dash-one-character sort. I would also like to configure the help text for the standard options, for instance for i18n or because I like starting with a lower case letter or... That i18n is a fantastic argument - and one that really means cmdargs has no choice but to support all the attributes on help/version. BTW another cool feature of an auto-magic option parsing lib is the GNU standard -- (arguments after this are not to be treated as options). cmdargs also supports this by default. Thanks, Neil ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
