On Tue, 7 Apr 2020 10:43:52 +0200
Ancor Gonzalez Sosa <an...@suse.de> wrote:

> On 2020-04-06 21:38, Arvin Schnell wrote:
> > On Mon, Apr 06, 2020 at 05:15:46PM +0200, josef Reidinger wrote:
> >   
> >> as you can read in previous mails, I am playing with xml parser used in 
> >> YaST. Nokogiri looks like the best option due to its relax ng support and 
> >> its availability in SLE (used in SLES-HA).
> >>
> >> And nokogiri has also one interesting feature and that is relaxed parsing 
> >> that tries hard to parse document even when it is malformed[1] ( but you 
> >> can still log errors).
> >> Example that nokogiri can parse:
> >> <test>
> >>   <not_closed>
> >>     <not_closed2>
> >>       value
> >>     </not_opened>
> >> </test>
> >>
> >> which results in something like test -> not_closed -> not_closed2 -> value 
> >> tree
> >>
> >> I check old yast yast parser and it is strict here and return nil and set 
> >> error.
> >> Question is should we keep old behavior or try to relax it and just logs 
> >> errors and warnings? For working profiles nothing changes.  
> > 
> > I think there parser should continue to be strict. Just imagine
> > people start to use broken XML as AutoYaST profiles. Years later
> > we cannot change the XML parser implementation because it behaves
> > different for those broken profiles and people complain that we
> > break compatibility.  
> 
> I agree. Let's be strict and fail early. Let's not perpetuate the mistakes.
> 
> > Also see the criticism section in
> > https://en.wikipedia.org/wiki/Robustness_principle.  
> 
> That's kind of similar to the idea of making errors during installation
> visible right away, instead of trying to hide them and just continue the
> process pretending nothing happened.
> 
> Cheers.


Thanks for both opinion. So I will use strict behavior.

Josef
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