Re: [Flightgear-devel] loading aircraft-data/foo.xml or not...

[<wki...@gm...>]

On 6/30/23 6:12 PM, TheFGFSEagle wrote:
> Well, you always can read the data file outside the aircraft.data mechanism by 
> using io.read_properties.

is that a nasal thing? i know some craft do something like this with specific 
files in the craft's directory...

the next thing is that apparently FG loads this file in question 
(aircraft-data/foo.xml) automatically so the problem is how to handle this 
decision /before/ FG loads the file...

i'm thinking that maybe there could be some hooks in the loader of this file 
that we can use via XML options in the -set.xml or -main.xml... something to 
compare the (eg) aircraft-version before allowing the rest or some of the parts 
of the file to be loaded and maybe a hook using something to tell the loader to 
load or ignore the file...

i know what i'm trying to say but i'm having some trouble to convey it, i 
think... it has been another very long day for me...

thanks for your comments! :)


> Am Fr., 30. Juni 2023 um 17:48 Uhr schrieb <wki...@gm...>:
> 
> 
>     is there some way to read a property (eg: aircraft-version) from the
>     aircraft-data/foo.xml file before deciding to load it in its entirety, to load
>     certain specific properties from it, or to ignore it completely?
> 
>     the reason i ask is that sometimes when craft get updated, there may be
>     properties (or missing properties) in the file that cause problems for a craft
>     that has been updated... in all the cases i'm aware of, the fix was for the
>     user
>     to go behind the scenes and manually delete this file so the craft could start
>     clean... but that's not always a GoodThing<tm> because there may be data in the
>     file that is desirable (eg: hobbs clock) and doesn't cause problems...
> 
>     my idea is for the craft to somehow be able to handle this situation itself
>     without the user having to get involved behind the scenes or maybe think the
>     craft is just broken and go complaining about it... or not...



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