confique/src/internal.rs

//! These functions are used by the code generated by the macro, but are not
//! intended to be used directly. None of this is covered by semver! Do not use
//! any of this directly.

use crate::{Error, error::ErrorInner};

pub fn deserialize_default<I, O>(src: I) -> Result<O, serde::de::value::Error>
where
    I: for<'de> serde::de::IntoDeserializer<'de>,
    O: for<'de> serde::Deserialize<'de>,
{
    O::deserialize(src.into_deserializer())
}

pub fn into_deserializer<'de, T>(src: T) -> <T as serde::de::IntoDeserializer<'de>>::Deserializer
where
    T: serde::de::IntoDeserializer<'de>,
{
    src.into_deserializer()
}

pub fn missing_value_error(path: String) -> Error {
    ErrorInner::MissingValue(path).into()
}

pub fn prepend_missing_value_error(e: Error, prefix: &str) -> Error {
    match *e.inner {
        ErrorInner::MissingValue(path) => {
            ErrorInner::MissingValue(format!("{}.{}", prefix, path)).into()
        }
        e => e.into(),
    }
}

pub fn from_env<'de, T: serde::Deserialize<'de>>(key: &str, field: &str) -> Result<T, Error> {
    crate::env::deserialize(std::env::var(key).ok()).map_err(|e| {
        ErrorInner::EnvDeserialization {
            key: key.into(),
            field: field.into(),
            msg: e.0,
        }.into()
    })
}