registry-class: A registry contains a list of all currently defined...
In drewlanenga/renv: Load environment files in R

A registry contains a list of all currently defined environment variables, with utilities for evaluating references to other variables. Not meant for external usage.

vars: A named list of environment variables.
export_pattern: Regular expression for finding export statements in environment files.
var_pattern: Regular expression for identifying variable references.
variable_pattern: Regular expression for finding variable declarations.
comment_pattern: Regular expression for identifying comments

evaluate(v): Evaluate the value of the variable.
get(k): Retrieve the value of a variable.
initialize(): Create a new registry and initialize vars to all variables from current session.
load(env_file): Load an environment file and set all exported variables.
set(k, v): Add a new variable to the registry, and evaluate for references to other variables.