use config::{Config, ConfigError, Environment, File}; use serde::Deserialize; use std::{env, fs, io::Error, net::IpAddr, path::PathBuf, sync::RwLock}; static CONFIG_FILE_DEFAULTS: &str = "config/defaults.hjson"; static CONFIG_FILE: &str = "config/config.hjson"; #[derive(Debug, Deserialize, Clone)] pub struct Settings { pub setup: Option, pub database: DatabaseConfig, pub hostname: String, pub bind: IpAddr, pub port: u16, pub tls_enabled: bool, pub docs_dir: PathBuf, pub jwt_secret: String, pub pictrs_url: String, pub iframely_url: String, pub rate_limit: RateLimitConfig, pub email: Option, pub federation: FederationConfig, pub captcha: CaptchaConfig, } #[derive(Debug, Deserialize, Clone)] pub struct Setup { pub admin_username: String, pub admin_password: String, pub admin_email: Option, pub site_name: String, } #[derive(Debug, Deserialize, Clone)] pub struct RateLimitConfig { pub message: i32, pub message_per_second: i32, pub post: i32, pub post_per_second: i32, pub register: i32, pub register_per_second: i32, pub image: i32, pub image_per_second: i32, } #[derive(Debug, Deserialize, Clone)] pub struct EmailConfig { pub smtp_server: String, pub smtp_login: Option, pub smtp_password: Option, pub smtp_from_address: String, pub use_tls: bool, } #[derive(Debug, Deserialize, Clone)] pub struct CaptchaConfig { pub enabled: bool, pub difficulty: String, // easy, medium, or hard } #[derive(Debug, Deserialize, Clone)] pub struct DatabaseConfig { pub user: String, pub password: String, pub host: String, pub port: i32, pub database: String, pub pool_size: u32, } #[derive(Debug, Deserialize, Clone)] pub struct FederationConfig { pub enabled: bool, pub allowed_instances: String, pub blocked_instances: String, } lazy_static! { static ref SETTINGS: RwLock = RwLock::new(match Settings::init() { Ok(c) => c, Err(e) => panic!("{}", e), }); } impl Settings { /// Reads config from the files and environment. /// First, defaults are loaded from CONFIG_FILE_DEFAULTS, then these values can be overwritten /// from CONFIG_FILE (optional). Finally, values from the environment (with prefix LEMMY) are /// added to the config. /// /// Note: The env var `LEMMY_DATABASE_URL` is parsed in /// `lemmy_db/src/lib.rs::get_database_url_from_env()` fn init() -> Result { let mut s = Config::new(); s.merge(File::with_name(&Self::get_config_defaults_location()))?; s.merge(File::with_name(&Self::get_config_location()).required(false))?; // Add in settings from the environment (with a prefix of LEMMY) // Eg.. `LEMMY_DEBUG=1 ./target/app` would set the `debug` key // Note: we need to use double underscore here, because otherwise variables containing // underscore cant be set from environmnet. // https://github.com/mehcode/config-rs/issues/73 s.merge(Environment::with_prefix("LEMMY").separator("__"))?; s.try_into() } /// Returns the config as a struct. pub fn get() -> Self { SETTINGS.read().unwrap().to_owned() } pub fn get_database_url(&self) -> String { format!( "postgres://{}:{}@{}:{}/{}", self.database.user, self.database.password, self.database.host, self.database.port, self.database.database ) } pub fn get_config_defaults_location() -> String { env::var("LEMMY_CONFIG_DEFAULTS_LOCATION").unwrap_or_else(|_| CONFIG_FILE_DEFAULTS.to_string()) } pub fn get_config_location() -> String { env::var("LEMMY_CONFIG_LOCATION").unwrap_or_else(|_| CONFIG_FILE.to_string()) } pub fn read_config_file() -> Result { fs::read_to_string(Self::get_config_location()) } pub fn get_allowed_instances(&self) -> Vec { let mut allowed_instances: Vec = self .federation .allowed_instances .split(',') .map(|d| d.trim().to_string()) .collect(); // The defaults.hjson config always returns a [""] allowed_instances.retain(|d| !d.eq("")); allowed_instances } pub fn get_blocked_instances(&self) -> Vec { let mut blocked_instances: Vec = self .federation .blocked_instances .split(',') .map(|d| d.trim().to_string()) .collect(); // The defaults.hjson config always returns a [""] blocked_instances.retain(|d| !d.eq("")); blocked_instances } /// Returns either "http" or "https", depending on tls_enabled setting pub fn get_protocol_string(&self) -> &'static str { if self.tls_enabled { "https" } else { "http" } } /// Returns something like `http://localhost` or `https://lemmy.ml`, /// with the correct protocol and hostname. pub fn get_protocol_and_hostname(&self) -> String { format!("{}://{}", self.get_protocol_string(), self.hostname) } pub fn save_config_file(data: &str) -> Result { fs::write(CONFIG_FILE, data)?; // Reload the new settings // From https://stackoverflow.com/questions/29654927/how-do-i-assign-a-string-to-a-mutable-static-variable/47181804#47181804 let mut new_settings = SETTINGS.write().unwrap(); *new_settings = match Settings::init() { Ok(c) => c, Err(e) => panic!("{}", e), }; Self::read_config_file() } }