Puppet users - Feb 2014 - Why is the environment setting limited to alphanumeric characters only?

Hi,

Our infrastructure design has the environment that a server lives in
embedded in its FQDN:

hostname.seccomp-environment.local

Where seccomp is the 'security compartment' (i.e. the kind of data it
houses) and env is the environment name.

I set my puppet.conf up so that 'environment = sc-env1' and got the
following error back from the master:

Error: Could not retrieve catalog from remote server: Error 400 on SERVER:
The environment must be purely alphanumeric, not 'sc-env1'

I can kind of understand there being some limitations around allowed
characters (e.g. $, #, %), but I'd have thought that a hyphen would be a)
pretty safe and b) quite a common use case.  Reading the fine manual (
http://docs.puppetlabs.com/guides/environment.html#naming-environments)
that actually mentions that underscores are allowed too; It's a shame the
error message doesn't allude to that (see PUP-1395).  So, for the time
being I'll translate our hyphens to underscores to workaround the
limitation.

Does anyone know why this restriction exists, and if there are any plans to
relax the restrictions?

Kind Regards,

Matt.

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