[Fontconfig] DTD

[jerrycasiano at gmail.com]

That's a pretty cool approach.

The reality is I'm not so much concerned about whether the values are
valid or not, more that the structure of the file itself is valid.

I was under the impression that's what a DTD is for.

In any case, if I get around to it I'll probably modify your script to
return a pass/fail and use that instead.

Thanks for sharing.

On Thu, 2018-05-03 at 14:48 +1200, Lawrence D'Oliveiro wrote:
> On Wed, 02 May 2018 22:14:35 -0400, jerrycasiano at gmail.com wrote:
> 
> > Since it doesn't really take any time or effort and it's pointed
> > out
> > silly mistakes in the past, I think I'll continue to do what I'm
> > doing
> > rather than wait for users to file bugs.
> 
> Following is a pretty trivial, not to say useless, example of a
> Fontconfig file, designed purely to show the kinds of errors that no
> DTD can pick up.
> 
> Pass:
> 
>     <!-- config parsing test -->
>     <fontconfig>
>         <int>3</int>
>     </fontconfig>
> 
> Fail:
> 
>     <!-- config parsing test -->
>     <fontconfig>
>         <int>3.5</int>
>     </fontconfig>
> 
> The error report:
> 
>      Fontconfig error: ..., line 3: "3.5": not a valid integer
> 
> Here’s the very simple validator script I used:
> 
>     #!/usr/bin/python3
> 
>     import sys
>     import fontconfig
> 
>     conf = fontconfig.Config.create()
>     conf.parse_and_load \
>       (
>         filename = sys.argv[1],
>         complain = True
>       )
>     sys.stdout.write("parse completed OK?\n")
> 
> And not a DTD in sight.
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