[Catalyst] YAML Config

[Oleg Pronin]

Hi.

I would like to use references to variables that have been defined in my
yaml config.

Something like this:

var_dir: &var __path_to(var)__

log_dir: &log *var/log
log_file: *log/file.txt

This is a feature of YAML 1.0.
But it seems that only *pure* aliases (*var) work only in YAML::Syck &&
YAML::XS
log_dir: &log *var

YAML dies with "YAML Error: Can't define both an anchor and an alias".

And it is not clear for me how to modify *var to say: (this is a syntax
error in all parsers)
log_dir: &log *var/log

How to use other variables' values in yaml config?
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