Currently, I'm making use of `db_mysql`, which means that there must already be
a `MySQL` driver installed.
If MySQL is there, the program compiles fine and runs fine.
If MySQL is not installed, the program still compiles fine but throws an error
(that's on Mac):
could not load:
(libmysqlclient|libmariadbclient)(|.20|.19|.18|.17|.16|.15).dylib
(compile with -d:nimDebugDlOpen for more information)
Run
One way I've though of is compiling with different switches: so, we'll have
normal compilation (with MySQL included) and `-d:nomysql`, where I will be
checking for it throughout the code with `when` blocks and exclude the relevant
parts.
The question is: can I perform this type of testing, when the program runs, and
instead of having the program quit on error, display a nice message that "X" is
not available? (when trying to use something that _will_ need MySQL)
