Struct EnvSource 

pub struct EnvSource { /* private fields */ }

Reads config from environment variables with a given prefix.

PREFIX_WINDOW__WIDTH=1024 → { "window": { "width": 1024 } }

Double-underscore (__) is the nested key separator.

Trait Implementations

impl Default for EnvSource

fn default() -> Self

Returns the “default value” for a type.

impl From<&str> for EnvSource

fn from(prefix: &str) -> Self

Converts to this type from the input type.

impl From<String> for EnvSource

fn from(prefix: String) -> Self

Converts to this type from the input type.

impl Source for EnvSource

fn with_app_name(self, name: &str) -> Self

Inject the application name derived from crate::config::ConfigSchema::APP_NAME.

fn collect(&self) -> Result<ConfigValue, SourceError>

Collect config values from this source.