[Freeciv-Dev] [patch #3140] Roads order to savegame

[Jacob Nevins]

Follow-up Comment #2, patch #3140 (project freeciv):

Bit late but:
> I actually would appreciate some input about how we should 
> handle savegame compatibility issues in development. [...] 
> Can we just ignore the compatibility issues between two 
> savegame formats that are introduced during active 
> development (trunk) of the new version? If not, do we 
> icrease format version number between the intermediate 
> formats and provide compatibility hooks, or do we adjust 
> to such changes within main loading code?
For my money, while it's desirable to maintain continuous compatibility during
development if practical (helps with binary chop, etc), if it means we have to
keep compatibility code forever for some transient state that only ever
existed deep on an unstable development branch, I'd rather we just broke
compatibility (saying so in commit messages).

(See also bug #19029.)

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[Freeciv-Dev] [patch #3140] Roads order to savegame

[Marko Lindqvist]

Update of patch #3140 (project freeciv):

  Status:  Ready For Test => Done   
 Assigned to:None => cazfi  
 Open/Closed:Open => Closed 


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[Freeciv-Dev] [patch #3140] Roads order to savegame

[Marko Lindqvist]

URL:
  

 Summary: Roads order to savegame
 Project: Freeciv
Submitted by: cazfi
Submitted on: Sat 18 Feb 2012 02:36:05 AM EET
Category: general
Priority: 5 - Normal
  Status: Ready For Test
 Privacy: Public
 Assigned to: None
Originator Email: 
 Open/Closed: Open
 Discussion Lock: Any
 Planned Release: 2.5.0

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Details:

This patchs adds saving and loading of Roads order. There's not yet anything
that would be saved dependant on that order, but I found out that having this
one separately first makes development of all the other roads related savegame
handling patches much easier.

I actually would appreciate some input about how we should handle savegame
compatibility issues in development. It would be very hard to create one
megalopatch that would switch everything to use generic roads, with proper
backward compatibility hooks, at one go. Having several intermediate versions
would mean more complicated compatibility handling. Can we just ignore the
compatibility issues between two savegame formats that are introduced during
active development (trunk) of the new version? If not, do we icrease format
version number between the intermediate formats and provide compatibility
hooks, or do we adjust to such changes within main loading code?

Looking the kind of format changes required compared to older freeciv
versions, I'm currently not sure if this new style compatibility hooks system
is really suitable for the work. Hooks between earlier versions have simply
added or deleted entries from section file, but now content of one entry
affects how contents of other entries should be modified, and all this in deep
loops.



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File Attachments:


---
Date: Sat 18 Feb 2012 02:36:05 AM EET  Name: RoadOrderSave.diff  Size: 4kB  
By: cazfi



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