Function powerpack_env::var
source · pub fn var<K: AsRef<OsStr>>(key: K) -> Option<String>
Expand description
Fetches the environment variable key
from the current process.
This function is similar to std::env::var(key).ok()
but
it also maps an empty string to None
.
None
Returns None
in the following cases:
- if the environment variable is not present.
- if the environment variable is not valid Unicode.
- if the environment variable is set to an empty string.