Re: Pass arguments at compile time

[bauss via Digitalmars-d-learn]

On Wednesday, 13 June 2018 at 10:57:27 UTC, Malte wrote:
I want to import a config file at compile time, but also need a 
way to have multiple configurations.

With gcc you could do something like 
-DIMPORTFROM='"MyConfigFile.txt"'. Is there any equivalent in D?

Hardcoding the config files for different versions and using 
that is not an option. Requiring a fixed filename and using 
different paths to configure with -J wouldn't be a good 
solution for my specific situation either.

So far my best idea was to write the wanted filename to a file 
and import twice.
enum config = import(import("importFrom.txt"));

That works, but that is additional work for the build script 
and feels like a hack.

If you're using dub just specify "stringImportPath" as a folder 
to the configuration files.

You can't retrieve the files though, so you'd need to know the 
names of the files you want to use.

However if they're located in the path then you can just do enum 
config = import("MyconfigFile.txt");