[GRASS5] g.manual and getopts

[GRASS]

From: Markus Neteler <neteler at geog.uni-hannover.de>
> 
> Hi all,
> 
> just found (probably) a solution for the problem of parameter/flag
> positioning in GRASS scripts (especially tcltkgrass is affected, reported by
> Andreas for g.manual):
> 
> getopts
> http://orca.st.usm.edu/~seyfarth/unix/unix-6-11-17.html
> 
>                     * getopts gets shell scripts options 
> 
>                     * while getopts ivo: op
>                       do
>                          case $op in
>                          i) invert=1 ;;
>                          v) verbose=1 ;;
>                          o) filename=$OPTARG ;;
>                          esac
>                       done
>                       shift 'expr $OPTIND - 1'
> 
>                     * After the shift the remaining arguments are in $* 
> 
>                     * Script option syntax is flexible:
>                       doit -i -v file1
>                       doit -iv file1 -o file2 
> 
> 
> This might be a way to allow flexible flag/parameters:
> man getopts:
> "getopts is used by shell procedures to parse  positional  parameters."
> 
> Maybe someone is willing to update g.manual script and we update other
> scripts later while learning from the g.manual implementation.
> 

Hi developers,

Actually it's another problem. getopts can not understand command line like
the following:

	doit this that -i -v file1		# BAD USAGE

getopts assumes that ALL options(like -?) are followed by another arguments.

	doit -i -v file1 this that		# GOOD USAGE

And tcltkgrass may want bad usage :-)
I think the latter is more standard. isn't it?

Anyway, I changed g.manual to use getopts. This can not work with current
tcltkgrass.
"g.manual entries=d.area -f" should be changed to "g.manual -f entries=d.area".
In addition, -f flag is not implemented by original g.manual script author
and i don't know what it is.

Now, g.manual allows some flexibility. However, each option in g.manual is
exclusive to another. So this may be useless :-)

Yours,
Huidae Cho

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