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Re: [help-gengetopt] Use argp for nicer output and more flexibility?
From: |
Simon Josefsson |
Subject: |
Re: [help-gengetopt] Use argp for nicer output and more flexibility? |
Date: |
Wed, 25 Jun 2003 17:20:15 +0200 |
User-agent: |
Gnus/5.1003 (Gnus v5.10.3) Emacs/21.3.50 (gnu/linux) |
Lorenzo Bettini <address@hidden> writes:
> Hi there
>
> I don't know argp actually (could you please point me to some quick
> reference about it).
The GNU libc manual has a section on argp. argp_parse seem to be a
superset of getopt. Try building the examples and run them, they
behave quite good with minimal effort from the developer.
> If you list what you would like from gengetopt generated code, I could
> try to implement it as soon as possible (e.g. how you'd like the
> output with --help, and so on).
The main thing that make me consider argp right now are:
* Flowed text for parameter descriptions. This prevents writing long
descriptions for parameters.
E.g. compare from idn:
--quiet Don't print the welcome greeting
(default=off)
With gsasl (uses argp):
--service=STRING Set the requested service name (should be a
registered GSSAPI host based service name).
* Grouping of descriptions. E.g., the "Network.." and "Misc..." text
in gsasl:
...
Network parameters:
--connect=HOSTNAME[:SERVICE]
Connect to TCP server and negotiate on stream
instead of stdin/stdout. SERVICE is the protocol
service, or an integer denoting the port, and
defaults to 143 (imap) if not specified. Also sets
the --hostname default.
Miscellaneous options:
--application-data After authentication, read data from stdin and run
it through the mechanism's security layer and
print it base64 encoded to stdout. The default is
to terminate after authentication.
--imap Use a IMAP-like logon procedure (client only).
Also sets the --service default to "imap".
...
* Generates --version and --usage automatically.
Thanks,
Simon
>
> I look forward to hearing from you
>
> cheers
> Lorenzo
>
> Simon Josefsson wrote:
>> Hello,
>> I'm using gengetopt in libidn but I'm considering moving to argp
>> which
>> IMHO is more flexible and generate nicer output. E.g., help texts are
>> flowed (no >80 column texts), parameters can be grouped in the --help
>> output with some description text, generate --usage. See glibc manual
>> for the entire story.
>> But then I would lose the nice code-generation idea in gengetopt,
>> and
>> the configuration file parser (which I don't need in libidn, but I
>> need it in another project which currently uses argp).
>> So it occurred to me that the best (from my point of view) would be
>> to
>> generate argp code given the gengetopt description file. I'm not sure
>> this could be implemented completely backwards compatible, or if that
>> is even important, though.
>> Code for the argp implementation would have to be included, since it
>> isn't generally available on all platforms, but as it happen I'm
>> currently working on making the libc argp implementation portable (as
>> part of gnulib).
>> What do you think?
>> Before you ask, I don't volunteer to implement this in gengetopt. :)
>> I
>> am willing to work on any argp modifications that could be required
>> though.
>
>
> --
> +-----------------------------------------------------+
> | Lorenzo Bettini ICQ# lbetto, 16080134 |
> | PhD in Computer Science |
> | Dip. Sistemi e Informatica, Univ. di Firenze |
> | Tel +39 055 4796741, Fax +39 055 4796730 |
> | Florence - Italy (Linux User # 158233) |
> | Home Page : http://www.lorenzobettini.it |
> | http://music.dsi.unifi.it XKlaim language |
> | http://www.lorenzobettini.it/purple Cover Band |
> | http://www.gnu.org/software/src-highlite |
> | http://www.gnu.org/software/gengetopt |
> | http://www.lorenzobettini.it/software/gengen |
> +-----------------------------------------------------+
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