There are some decent command line parsing APIs out there one could copy,
like:
http://visionmedia.github.com/commander.js/
http://code.google.com/p/joptparse/
http://docs.python.org/library/argparse.html#module-argparse
Inevitably, the feature set of all option parsing libraries converge ...
might as well start with a good design.
Cheers,
Dobes
On Mon, Sep 10, 2012 at 5:31 PM, john skaller <skal...@users.sourceforge.net
> wrote:
> I am sick of hacking up parsers for command line options.
> So I propose this:
>
> Given an array of words, we will translate according to a cut down GNU
> option
> syntax.
>
> We make a string->list[string] dictionary:
> if the option has the form:
>
> (a) --name=argument
>
> Put key = --name, value = Cons (argument, oldarguments) into the
> dictionary.
>
> (b) --option
>
> Put key --option, cons "" onto value
>
> (c) -abcdef
>
> put each of -a, -b, -c ... into the dictionary cons value ""
>
> (d) other
>
> Put key = "", value = Cons (argument, oldarguments) into the dictionary
>
>
> get-option function is given a key and returns a list of options.
> It cannot fail. It returns Empty[string] if the option is not set.
> It returns list("") if the option is set once but has no value given.
>
> According to these rules all options have the form:
>
> --key=value
>
> where either --key= or =value can be omitted,
> EXCEPT for the sugar -abcd.
>
> To cope with -I includefile, we can pre-process the
> input array.
>
>
> JSON like thing is another thought.
> bash at least allows [ ] { } , : without munging
> which is enough to put json on command lines.
>
> [flx, {c:true, I:includefile}, cmd, arg, arg]
>
> looks kind of weird though :-)
>
>
> --
> john skaller
> skal...@users.sourceforge.net
> http://felix-lang.org
>
>
>
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