use config::{Config, ConfigError, Environment, File}; use failure::Error; use serde::Deserialize; use std::env; use std::fs; use std::net::IpAddr; use std::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: Database, pub hostname: String, pub bind: IpAddr, pub port: u16, pub jwt_secret: String, pub front_end_dir: String, pub rate_limit: RateLimitConfig, pub email: Option, pub federation_enabled: bool, } #[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, } #[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 Database { pub user: String, pub password: String, pub host: String, pub port: i32, pub database: String, pub pool_size: u32, } 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. fn init() -> Result { let mut s = Config::new(); s.merge(File::with_name(CONFIG_FILE_DEFAULTS))?; s.merge(File::with_name(CONFIG_FILE).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() } /// Returns the postgres connection url. If LEMMY_DATABASE_URL is set, that is used, /// otherwise the connection url is generated from the config. pub fn get_database_url(&self) -> String { match env::var("LEMMY_DATABASE_URL") { Ok(url) => url, Err(_) => format!( "postgres://{}:{}@{}:{}/{}", self.database.user, self.database.password, self.database.host, self.database.port, self.database.database ), } } pub fn api_endpoint(&self) -> String { format!("{}/api/v1", self.hostname) } pub fn read_config_file() -> Result { Ok(fs::read_to_string(CONFIG_FILE)?) } 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() } }