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use std::env;
use config::{ConfigError, Config, File, Environment};
#[derive(Debug, Deserialize)]
struct Database {
url: String,
}
#[derive(Debug, Deserialize)]
struct Sparkpost {
key: String,
token: String,
url: String,
version: u8,
}
#[derive(Debug, Deserialize)]
struct Twitter {
consumer_token: String,
consumer_secret: String,
}
#[derive(Debug, Deserialize)]
struct Braintree {
merchant_id: String,
public_key: String,
private_key: String,
}
#[derive(Debug, Deserialize)]
pub struct Settings {
debug: bool,
database: Database,
sparkpost: Sparkpost,
twitter: Twitter,
braintree: Braintree,
}
impl Settings {
pub fn new() -> Result<Self, ConfigError> {
let mut s = Config::new();
// Start off by merging in the "default" configuration file
s.merge(File::with_name("config/default"))?;
// Add in the current environment file
// Default to 'development' env
// Note that this file is _optional_
let env = env::var("RUN_MODE").unwrap_or("development".into());
s.merge(File::with_name(&format!("config/{}", env)).required(false))?;
// Add in a local configuration file
// This file shouldn't be checked in to git
s.merge(File::with_name("config/local").required(false))?;
// Add in settings from the environment (with a prefix of APP)
// Eg.. `APP_DEBUG=1 ./target/app` would set the `debug` key
s.merge(Environment::with_prefix("app"))?;
// You may also programmatically change settings
s.set("database.url", "postgres://")?;
// Now that we're done, let's access our configuration
println!("debug: {:?}", s.get_bool("debug"));
println!("database: {:?}", s.get::<String>("database.url"));
// You can deserialize (and thus freeze) the entire configuration as
s.deserialize()
}
}
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