If you decide on a configuration file, you may want it encrypted. If you do, Config::Identity may be of help to you. I qualify the recommendation because:

• You need a working GPG installation
• It actually spawns a command to do the encryption, so your script needs to run in an environment where this is possible
• It does not create the file, only read and decrypt it once created

Should you decided to pursue this module, I found that I had to set environment variable CI_GPG to the path to gpg2, because by default the module prefers gpg.