steid

steid/src/application/config.rs

2.4 KBCode·Blame·Raw

0d12f7dfeat: config from env and SQLite pool in app context1mo	1	use std::path::PathBuf;
	2
	3	use serde::Deserialize;
	4
	5	/// Application configuration, read from `STEID_`-prefixed environment variables.
	6	///
	7	/// The bind address is deliberately absent: Topcoat owns it via `HOST` and `PORT`.
	8	#[derive(Debug, Clone, Deserialize)]
	9	pub struct AppConfig {
	10	/// SQLite connection string. Needs `mode=rwc` to create the file on first boot.
	11	#[serde(default = "default_database_url")]
	12	pub database_url: String,
	13
	14	/// Root directory for bare git repositories, laid out as `{data_dir}/{org}/{repo}.git`.
	15	///
	16	/// Unread until Milestone 2 introduces `GitStorage`; carried now so the config
	17	/// surface matches the documented environment.
	18	#[allow(dead_code)]
	19	#[serde(default = "default_data_dir")]
	20	pub data_dir: PathBuf,
	21	}
	22
	23	fn default_database_url() -> String {
	24	"sqlite:steid.db?mode=rwc".to_owned()
	25	}
	26
	27	fn default_data_dir() -> PathBuf {
	28	PathBuf::from("./data")
	29	}
	30
	31	impl AppConfig {
	32	/// Loads configuration from the environment, applying defaults for anything unset.
	33	pub fn from_env() -> Result<Self, envy::Error> {
	34	envy::prefixed("STEID_").from_env()
	35	}
	36	}
	37
	38	#[cfg(test)]
	39	mod tests {
	40	use super::*;
	41
	42	/// Builds a config from an explicit iterator rather than the process environment,
	43	/// so tests don't race on shared global state.
	44	fn from_pairs(pairs: &[(&str, &str)]) -> Result<AppConfig, envy::Error> {
	45	envy::prefixed("STEID_")
	46	.from_iter(pairs.iter().map(\|(k, v)\| ((k).to_owned(), (v).to_owned())))
	47	}
	48
	49	#[test]
	50	fn applies_defaults_when_environment_is_empty() {
	51	let config = from_pairs(&[]).expect("defaults should satisfy every field");
	52
	53	assert_eq!(config.database_url, "sqlite:steid.db?mode=rwc");
	54	assert_eq!(config.data_dir, PathBuf::from("./data"));
	55	}
	56
	57	#[test]
	58	fn reads_prefixed_variables() {
	59	let config = from_pairs(&[
	60	("STEID_DATABASE_URL", "sqlite:custom.db?mode=rwc"),
	61	("STEID_DATA_DIR", "/srv/steid/repos"),
	62	])
	63	.expect("explicit values should parse");
	64
	65	assert_eq!(config.database_url, "sqlite:custom.db?mode=rwc");
	66	assert_eq!(config.data_dir, PathBuf::from("/srv/steid/repos"));
	67	}
	68
	69	#[test]
	70	fn ignores_unprefixed_variables() {
	71	let config = from_pairs(&[("DATA_DIR", "/should/be/ignored")])
	72	.expect("unprefixed keys should not interfere");
	73
	74	assert_eq!(config.data_dir, PathBuf::from("./data"));
	75	}
	76	}