[QGIS-Developer] Improve build times with ccache

[Matthias Kuhn]

Hi again,

Just remembered another nifty trick. Only compile the target 
qgis_desktop (ninja qgis_desktop) when working on desktop related code. 
That will also skip compiling server and linking tests. Therefore: if 
you want to run cpp tests locally, you have to also to remember to build 
them individually.

And by the way welcome on board :)

Matthias

On 12/16/19 9:02 AM, Matthias Kuhn wrote:
> Hi,
>
> Ccache is certainly a good idea.
>
> The other one is to actually keep several source and build folders in 
> parallel (e.g. release-3_4, release-3_10, master). I would recommend 
> getting familiar with "git worktree" which is an amazing utility to 
> use several sources in parallel, based on the same git configuration.
>
> I quite often develop small fixes on a master tree with mixed patches 
> on top and then compile this mixed branch and do:
>
> git commit
>
> git worktree add ../my_new_functionality
>
> cd ../my_new_functionality
>
> git rebase -i qgis/master
>
> # only keep the commits to be pushed
>
> git push -u my_own_repo my_new_functionality
>
>
> For small fixes here and there this is super fast to work with
>
> Hope this helps
>
> Matthias
>
> On 12/16/19 8:57 AM, Samweli wrote:
>> Hi, I just joined Kartoza and I am going to be doing a bunch of work 
>> on the
>> QGIS core. Can someone share a good practice to avoid lengthy 
>> recompilation
>> times when I switch branches. I'm using ccache in compiling.
>>
>>
>>
>> -- 
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