mirror of https://github.com/mastodon/flodgatt
114 lines
3.6 KiB
Rust
114 lines
3.6 KiB
Rust
mod deployment_cfg;
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mod deployment_cfg_types;
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mod postgres_cfg;
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mod redis_cfg;
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mod redis_cfg_types;
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pub use self::{
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deployment_cfg::DeploymentConfig,
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postgres_cfg::PostgresConfig,
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redis_cfg::RedisConfig,
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redis_cfg_types::{RedisInterval, RedisNamespace},
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};
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use std::collections::HashMap;
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use url::Url;
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pub struct EnvVar(pub HashMap<String, String>);
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impl std::ops::Deref for EnvVar {
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type Target = HashMap<String, String>;
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fn deref(&self) -> &HashMap<String, String> {
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&self.0
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}
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}
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impl Clone for EnvVar {
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fn clone(&self) -> Self {
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Self(self.0.clone())
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}
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}
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impl EnvVar {
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fn update_with_url(mut self, url_str: &str) -> Self {
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let url = Url::parse(url_str).unwrap();
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let none_if_empty = |s: String| if s.is_empty() { None } else { Some(s) };
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self.maybe_add_env_var("REDIS_PORT", url.port());
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self.maybe_add_env_var("REDIS_PASSWORD", url.password());
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self.maybe_add_env_var("REDIS_USERNAME", none_if_empty(url.username().to_string()));
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self.maybe_add_env_var("REDIS_DB", none_if_empty(url.path()[1..].to_string()));
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for (k, v) in url.query_pairs().into_owned() {
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match k.to_string().as_str() {
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"password" => self.maybe_add_env_var("REDIS_PASSWORD", Some(v.to_string())),
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"db" => self.maybe_add_env_var("REDIS_DB", Some(v.to_string())),
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_ => crate::err::die_with_msg(format!(
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r"Unsupported parameter {} in REDIS_URL.
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Flodgatt supports only `password` and `db` parameters.",
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k
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)),
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}
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}
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self
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}
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fn maybe_add_env_var(&mut self, key: &str, maybe_value: Option<impl ToString>) {
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if let Some(value) = maybe_value {
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self.0.insert(key.to_string(), value.to_string());
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}
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}
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}
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#[macro_export]
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macro_rules! maybe_update {
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($name:ident; $item: tt:$type:ty) => (
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pub fn $name(self, item: Option<$type>) -> Self {
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match item {
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Some($item) => Self{ $item, ..self },
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None => Self { ..self }
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}
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});
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($name:ident; Some($item: tt: $type:ty)) => (
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fn $name(self, item: Option<$type>) -> Self{
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match item {
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Some($item) => Self{ $item: Some($item), ..self },
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None => Self { ..self }
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}
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})}
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#[macro_export]
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macro_rules! from_env_var {
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($(#[$outer:meta])*
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let name = $name:ident;
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let default: $type:ty = $inner:expr;
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let (env_var, allowed_values) = ($env_var:tt, $allowed_values:expr);
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let from_str = |$arg:ident| $body:expr;
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) => {
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pub struct $name(pub $type);
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impl std::fmt::Debug for $name {
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fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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write!(f, "{:?}", self.0)
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}
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}
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impl std::ops::Deref for $name {
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type Target = $type;
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fn deref(&self) -> &$type {
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&self.0
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}
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}
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impl std::default::Default for $name {
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fn default() -> Self {
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$name($inner)
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}
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}
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impl $name {
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fn inner_from_str($arg: &str) -> Option<$type> {
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$body
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}
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pub fn maybe_update(self, var: Option<&String>) -> Self {
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if let Some(value) = var {
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Self(Self::inner_from_str(value).unwrap_or_else(|| {
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crate::err::env_var_fatal($env_var, value, $allowed_values)
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}))
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} else {
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self
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}
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}
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}
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};
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}
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