gleam/erlang/os
Access to the shell’s environment variables
Functions
pub external fn get_all_env() -> Map(String, String)Returns the list of all available environment variables as a list of key, tuples.
Examples
> get_all_env()
map.from_list([
#("SHELL", "/bin/bash"),
#("PWD", "/home/j3rn"),
...
])
pub external fn get_env(name: String) -> Result(String, Nil)Returns the value associated with the given environment variable name.
Examples
> get_env("SHELL")
"/bin/bash"
> get_env(name: "PWD")
"/home/j3rn"
pub external fn set_env(name: String, value: String) -> NilAssociates the given value with the given environment variable name.
Examples
> set_env("MYVAR", "MYVALUE")
Nil
> get_env("MYVAR")
"MYVALUE"
> set_env(value: "MYVALUE", name: "MYVAR")
Nil
pub external fn unset_env(name: String) -> NilRemoves the environment variable with the given name.
Returns Nil regardless of whether the variable ever existed.
Examples
> get_env("MYVAR")
Ok("MYVALUE")
> unset_env("MYVAR")
Nil
> get_env("MYVAR")
Error(Nil)
> unset_env(name: "MYVAR")
Nil