Atom containing access counts for all environment maps.

Helper function for the defenv macro. Declares properties for an environment variable, checking various schema attributes.

Define a new environment variable used by the system.

Global default environment map as loaded by environ.core.

Map of environment keywords to a definition map which may contain a :description and optionally a :type for auto-coercion.

Updates the global environment map with a new value for the given variable. This should generally only be used from a REPL, and will not affect the actual system environment!

Simple key->predicate schema for variable definitions.