igor 0.1.1

Generic text-based vendoring
Documentation 
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use std::borrow::Cow;
use serde::{Deserialize, Serialize};
use anyhow::Result;
use super::invar_config_data::InvarConfigData;
use crate::config_model::{NicheDescription, ThundercloudConfig};
use crate::config_model::niche_description::NicheDescriptionData;
use crate::file_system::ConfigFormat;

#[derive(Deserialize,Serialize,Debug)]
#[serde(rename_all = "kebab-case")]
pub struct ThundercloudConfigData {
    niche: NicheDescriptionData,
    invar_defaults: Option<InvarConfigData>
}

impl ThundercloudConfig for ThundercloudConfigData {
    type InvarConfigImpl = InvarConfigData;

    fn from_str(data: &str, config_format: ConfigFormat) -> Result<Self> {
        let config: ThundercloudConfigData =
            match config_format {
                ConfigFormat::TOML => toml::from_str(data)?,
                ConfigFormat::YAML => {
                    let result = serde_yaml::from_str(data)?;

                    #[cfg(test)]
                    crate::test_utils::log_toml("Thundercloud Config", &result)?;

                    result
                },
            }
        ;
        Ok(config)
    }

    fn niche(&self) -> &impl NicheDescription {
        &self.niche
    }

    fn invar_defaults(&self) -> Cow<Self::InvarConfigImpl> {
        let result: Cow<Self::InvarConfigImpl>;
        if let Some(invar_config) = &self.invar_defaults {
            result = Cow::Borrowed(invar_config)
        } else {
            result = Cow::Owned(InvarConfigData::default())
        }
        result
    }
}