[OSM-dev] Questions on modifying openstreetmap-carto

[Andy Townsend]

On 25/08/2020 19:52, Mateusz Konieczny via dev wrote:
> Yes, I always used normal text editor.
>
Same here.  There are projects such as 
https://wiki.openstreetmap.org/wiki/TileMill which were / are designed 
to automate map reloading after changes, but when I last used TileMill 
(a long time ago) there were signnificant problems using TileMill with 
an OSM Carto-derived style (not least - there are so many tabs that they 
disappeared off the screen).  I tend to just reload when I want to 
rerender.  When changing my own OSM Carto-derived map style I use 
https://github.com/SomeoneElseOSM/SomeoneElse-style/blob/master/update_render.sh 
and 
https://github.com/SomeoneElseOSM/SomeoneElse-style/blob/master/update_carto.sh 
to reload data (the first if a lua script has changed and the database 
needs to be reloaded; the second if only a style file has changed and 
the style just needs to be recompiled).


> If you want to see how changes are done
> I would recommend looking at pull requests
> and commit history.
>
I tried to summarise "Adding a change to OSM Carto" at 
https://www.openstreetmap.org/user/SomeoneElse/diary/43041 ; some of 
that won't be relevant but some of it might still be - things like 
testing the effect of a colour change.

If you haven't seen it already, please do read 
https://ircama.github.io/osm-carto-tutorials/git-workflow/ and the 
related tutorials there - they're excellent!

Best Regards,

Andy