Function load_config_from_path

src/config.rs:416–442

Loads configuration from an explicit config path while preserving the project root used for default config values.

(project_root: &Path, config_path: &Path)

/// Loads configuration from an explicit config path while preserving the
/// project root used for default config values.
pub fn load_config_from_path(project_root: &Path, config_path: &Path) -> Result<TraceDecayConfig> {
    if !config_path.exists() {
        return Ok(TraceDecayConfig {
            root_dir: project_root.to_string_lossy().to_string(),
            ..TraceDecayConfig::default()
        });
    }

    let contents = fs::read_to_string(config_path).map_err(|e| TraceDecayError::Config {
        message: format!(
            "failed to read config file '{}': {}",
            config_path.display(),
            e
        ),
    })?;

    let config: TraceDecayConfig =
        serde_json::from_str(&contents).map_err(|e| TraceDecayError::Config {
            message: format!(
                "failed to parse config file '{}': {}",
                config_path.display(),
                e
            ),
        })?;

    Ok(config)
}

/// Saves the configuration to disk using an atomic write.
///