Trait Env 

pub trait Env:
    Debug
    + Send
    + Sync
    + 'static {
    // Required methods
    fn var(&self, key: &str) -> Option<String>;
    fn vars(&self) -> HashMap<String, String>;
    fn home_dir(&self) -> Option<PathBuf>;
}

Available on crate feature reqsign only.

Permits parameterizing the home functions via the _from variants

Required Methods

fn var(&self, key: &str) -> Option<String>

Get an environment variable.

• Returns Some(v) if the environment variable is found and is valid utf-8.
• Returns None if the environment variable is not found or value is invalid.

fn vars(&self) -> HashMap<String, String>

Returns a hashmap of (variable, value) pairs of strings, for all the environment variables of the current process.

fn home_dir(&self) -> Option<PathBuf>

Return the path to the users home dir, returns None if any error occurs.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors

impl Env for NoopEnv

impl Env for OsEnv

impl Env for StaticEnv