Lines of src/main.rs from check-in f5ed284f8c that are changed by the sequence of edits moving toward check-in a044f68fa7:

                         1: //! Simple SMTP-to-Telegram gateway. Can parse email and send them as telegram
                         2: //! messages to specified chats, generally you specify which email address is
                         3: //! available in configuration, everything else is sent to default address.
                         4: 
                         5: mod mail;
                         6: mod telegram;
                         7: mod utils;
                         8: 
                         9: #[cfg(test)]
                        10: mod tests;
                        11: 
                        12: use crate::mail::MailServer;
                        13: 
f5ed284f8c 2025-06-21   14: use anyhow::{
f5ed284f8c 2025-06-21   15: 	bail,
f5ed284f8c 2025-06-21   16: 	Context,
f5ed284f8c 2025-06-21   17: 	Result,
f5ed284f8c 2025-06-21   18: };
f5ed284f8c 2025-06-21   19: use async_std::{
f5ed284f8c 2025-06-21   20: 	fs::metadata,
f5ed284f8c 2025-06-21   21: };
                        22: use just_getopt::{
                        23: 	OptFlags,
                        24: 	OptSpecs,
                        25: 	OptValue,
                        26: };
                        27: 
                        28: use std::{
                        29: 	io::Cursor,
                        30: 	os::unix::fs::PermissionsExt,
                        31: 	path::Path,
                        32: };
                        33: 
                        34: #[async_std::main]
                        35: async fn main () -> Result<()> {
                        36: 	let specs = OptSpecs::new()
                        37: 		.option("help", "h", OptValue::None)
                        38: 		.option("help", "help", OptValue::None)
                        39: 		.option("config", "c", OptValue::Required)
                        40: 		.option("config", "config", OptValue::Required)
                        41: 		.flag(OptFlags::OptionsEverywhere);
                        42: 	let mut args = std::env::args();
                        43: 	args.next();
                        44: 	let parsed = specs.getopt(args);
                        45: 	for u in &parsed.unknown {
                        46: 		println!("Unknown option: {u}");
                        47: 	}
                        48: 	if !(parsed.unknown.is_empty()) || parsed.options_first("help").is_some() {
                        49: 		println!("SMTP2TG v{}, (C) 2024 - 2025\n\n\
                        50: 			\t-h|--help\tDisplay this help\n\
                        51: 			\t-c|--config …\tSet configuration file location.",
                        52: 			env!("CARGO_PKG_VERSION"));
                        53: 		return Ok(());
                        54: 	};
                        55: 	let config_file = Path::new(if let Some(path) = parsed.options_value_last("config") {
                        56: 		&path[..]
                        57: 	} else {
                        58: 		"smtp2tg.toml"
                        59: 	});
                        60: 	if !config_file.exists() {
                        61: 		bail!("can't read configuration from {config_file:?}");
                        62: 	};
                        63: 	{
f5ed284f8c 2025-06-21   64: 		let meta = metadata(config_file).await?;
                        65: 		if (!0o100600 & meta.permissions().mode()) > 0 {
                        66: 			bail!("other users can read or write config file {config_file:?}\n\
                        67: 				File permissions: {:o}", meta.permissions().mode());
                        68: 		}
                        69: 	}
                        70: 	let settings: config::Config = config::Config::builder()
f5ed284f8c 2025-06-21   71: 		.set_default("fields", vec!["date", "from", "subject"]).unwrap()
f5ed284f8c 2025-06-21   72: 		.set_default("hostname", "smtp.2.tg").unwrap()
f5ed284f8c 2025-06-21   73: 		.set_default("listen_on", "0.0.0.0:1025").unwrap()
f5ed284f8c 2025-06-21   74: 		.set_default("unknown", "relay").unwrap()
f5ed284f8c 2025-06-21   75: 		.set_default("domains", vec!["localhost", hostname::get()?.to_str().expect("Failed to get current hostname")]).unwrap()
                        76: 		.add_source(config::File::from(config_file))
                        77: 		.build()
                        78: 		.with_context(|| format!("[{config_file:?}] there was an error reading config\n\
                        79: 			\tplease consult \"smtp2tg.toml.example\" for details"))?;
                        80: 
f5ed284f8c 2025-06-21   81: 	let listen_on = settings.get_string("listen_on")?;
f5ed284f8c 2025-06-21   82: 	let server_name = settings.get_string("hostname")?;
                        83: 	let core = MailServer::new(settings)?;
                        84: 	let mut server = mailin_embedded::Server::new(core);
                        85: 
                        86: 	server.with_name(server_name)
                        87: 		.with_ssl(mailin_embedded::SslConfig::None).unwrap()
                        88: 		.with_addr(listen_on).unwrap();
                        89: 	server.serve().unwrap();
                        90: 
                        91: 	Ok(())
                        92: }