global::utils
Utility functions to interact with the system.
fn
get_root_domain
fn get_root_domain(domain: SharedObject) -> String
fn get_root_domain(domain: String) -> String
Get the root domain (the registrable part)
foo.bar.example.com
=> example.com
fn
env
fn env(variable: String) -> ?
fn env(variable: SharedObject) -> ?
Fetch an environment variable from the current process.
variable
- the variable to fetch.
string
- the value of the fetched variable.()
- when the variable is not set, when the variable contains the sign character (=) or the NUL character, or that the variable does not contain valid Unicode.
#{
connect: [
rule "get env variable" || {
// get the HOME environment variable.
let home = utils::env("HOME");
// "VSMTP=ENV" is malformed, this will return the unit type '()'.
let invalid = utils::env("VSMTP=ENV");
// ...
}
],
}