config: add config struct

src/config.rs

@@ -0,0 +1,58 @@
+//! Runtime configuration construction
+//!
+//! This module handles fetching setting from user with environment
+//! variables, as well as providing a default configuration set
+//!
+//! The structure of [Settings] is a bit weird because of one of the ways
+//! that [config] seperators work by default. See [Environment](config::Environment).
+//! Realistically we could also just use field names like `cache_dir` and it should have
+//! the same effect if at some point having the substructs defined like this is annoying.
+
+use std::path::PathBuf;
+
+/// primary settings container
+#[derive(Debug)]
+pub struct Settings {
+    /// main upload cache setings
+    pub cache: Cache,
+    /// static serve settings
+    pub dist: Dist,
+    /// database settings
+    pub database: Database,
+}
+
+/// main upload cache setings
+#[derive(Debug)]
+pub struct Cache {
+    /// directory that the cached uploads are stored
+    ///
+    /// set with `NZ_CACHE_DIR`
+    ///
+    /// See:
+    /// - [crate::router::download]
+    /// - [crate::router::upload]
+    pub dir: PathBuf,
+}
+
+/// static serve settings
+#[derive(Debug)]
+pub struct Dist {
+    /// directory that nyazoom serves statically.
+    ///
+    /// set with `NZ_DIST_URL`
+    pub dir: PathBuf,
+}
+
+/// database settings
+#[derive(Debug)]
+pub struct Database {
+    /// database url used by [sqlx] to connect to the database
+    ///
+    /// currently nyazoom only supports sqlite databases
+    ///
+    /// set with `NZ_DATABASE_URL` env variable
+    ///
+    /// See:
+    /// - [crate::db]
+    pub url: String,
+}

src/lib.rs

@@ -1,3 +1,4 @@
+pub mod config;
 pub mod db;
 pub mod router;
 pub mod state;