Some way of passing global params? With internationalization as example

[iboates]

I was playing around with themepark for the first time today, specifically with regards to admin boundaries (as you probably saw in my PR) and I was wondering how I might be able to pick out internationalized names (e.g. name:en, name:de, name:fr) without having to modify the lua code between runs, or write completely new scripts. Is it possible to pass a kind of global param that is accessible by osm2pgsql/themepark? Because then you could have a helper function like (in Python because I don't know Lua off the top of my head):

LANGUAGE = "en"  # Passed as global param upon script invokation

def tag_i18n(tag_name, language):
    if "{tags[language]}:{tag_name}" is None:
        return {tag_name}
    return "{tags[language]}:{tag_name}"

print(f"This place is called {tag_i18n('name')}.")

I don't know how you would pass this, I guess it would require a new param on the command line, or maybe it could be done with env vars? But that seems kind of clunky

[lonvia]

You can always use environment variables to pass in global configuration. In Lua read them with os.getenv("VAR").

[iboates]

Ahh, very cool. Ok i will try this, thanks!

[joto]

Also have a look at the mechanism described under "Name Handling" on https://osm2pgsql.org/themepark/users-manual.html .