Method build

crates/learner/src/lib.rs:527–551

Builds a new [`Learner`] instance with the configured options. This method: 1. Resolves configuration from provided sources 2. Ensures required directories exist 3. Opens database connection 4. Initializes paper retriever # Errors Returns error if: - Configuration loading fails - Directory creation fails - Database initialization fails - Retriever configuration fails

(self)

  /// - Database initialization fails
  /// - Retriever configuration fails
  pub async fn build(self) -> Result<Learner> {
    let config = if let Some(config) = self.config {
      config
    } else if let Some(path) = self.config_path {
      let config_file = path.join("config.toml");
      let content = std::fs::read_to_string(config_file)?;
      toml::from_str(&content).map_err(|e| LearnerError::Config(e.to_string()))?
    } else {
      Config::load()?
    };

    // Ensure paths exist
    std::fs::create_dir_all(&config.retrievers_path)?;
    if let Some(parent) = config.database_path.parent() {
      std::fs::create_dir_all(parent)?;
    }
    std::fs::create_dir_all(&config.storage_path)?;

    let database = Database::open(&config.database_path).await?;
    database.set_storage_path(&config.storage_path).await?;

    let retriever = Retriever::new().with_config_dir(&config.retrievers_path)?;

    Ok(Learner { config, database, retriever })
  }
}

impl Learner {