Change config format from yaml to toml

src/error.rs

@@ -2,8 +2,8 @@ use thiserror::Error;
 
 #[derive(Error, Debug)]
 pub enum ConfigLoadError {
-	#[error("Failed to open config file: {0}")]
-	OpenFailed(#[source] std::io::Error),
 	#[error("Failed to read config file: {0}")]
-	ReadError(#[source] serde_yaml::Error),
+	ReadError(#[source] std::io::Error),
+	#[error("Failed to parse config file: {0}")]
+	ParseError(#[source] toml::de::Error),
 }

src/main.rs

@@ -6,7 +6,8 @@ mod migrating_send;
 mod schema;
 
 use std::env::args;
-use std::{env, fs::File, io::BufReader, sync::Arc};
+use std::fs::read_to_string;
+use std::{env, sync::Arc};
 
 use anyhow::Result;
 use async_mutex::Mutex;
@@ -48,7 +49,7 @@ pub struct Config {
 impl Config {
 	fn load() -> Result<Self, ConfigLoadError> {
 		let env_var_name = "CALENDAR_BOT_CONFIG_FILE";
-		let default_filename = "./config.yaml";
+		let default_filename = "./config.toml";
 		let path = env::var(env_var_name).unwrap_or_else(|_| {
 			warn!(
 				"Cannot read env var '{}', assuming '{}'",
@@ -57,9 +58,8 @@ impl Config {
 			default_filename.to_owned()
 		});
 		info!("Reading configuration from {}", path);
-		let file = File::open(path).map_err(ConfigLoadError::OpenFailed)?;
-		let reader = BufReader::new(file);
-		serde_yaml::from_reader(reader).map_err(ConfigLoadError::ReadError)
+		let s = read_to_string(path).map_err(ConfigLoadError::ReadError)?;
+		toml::from_str(&s).map_err(ConfigLoadError::ParseError)
 	}
 }