Move the sub-configuration path to an associated constant

crates/config/src/sections/branding.rs

@@ -46,9 +46,7 @@ pub struct BrandingConfig {
 
 #[async_trait]
 impl ConfigurationSection for BrandingConfig {
-    fn path() -> &'static str {
-        "branding"
-    }
+    const PATH: Option<&'static str> = Some("branding");
 
     async fn generate<R>(_rng: R) -> anyhow::Result<Self>
     where

crates/config/src/sections/clients.rs

@@ -181,9 +181,7 @@ impl IntoIterator for ClientsConfig {
 
 #[async_trait]
 impl ConfigurationSection for ClientsConfig {
-    fn path() -> &'static str {
-        "clients"
-    }
+    const PATH: Option<&'static str> = Some("clients");
 
     async fn generate<R>(_rng: R) -> anyhow::Result<Self>
     where

crates/config/src/sections/database.rs

@@ -146,9 +146,7 @@ pub struct DatabaseConfig {
 
 #[async_trait]
 impl ConfigurationSection for DatabaseConfig {
-    fn path() -> &'static str {
-        "database"
-    }
+    const PATH: Option<&'static str> = Some("database");
 
     async fn generate<R>(_rng: R) -> anyhow::Result<Self>
     where

crates/config/src/sections/email.rs

@@ -128,9 +128,7 @@ impl Default for EmailConfig {
 
 #[async_trait]
 impl ConfigurationSection for EmailConfig {
-    fn path() -> &'static str {
-        "email"
-    }
+    const PATH: Option<&'static str> = Some("email");
 
     async fn generate<R>(_rng: R) -> anyhow::Result<Self>
     where

crates/config/src/sections/experimental.rs

@@ -56,9 +56,7 @@ impl Default for ExperimentalConfig {
 
 #[async_trait]
 impl ConfigurationSection for ExperimentalConfig {
-    fn path() -> &'static str {
-        "experimental"
-    }
+    const PATH: Option<&'static str> = Some("experimental");
 
     async fn generate<R>(_rng: R) -> anyhow::Result<Self>
     where

crates/config/src/sections/http.rs

@@ -394,9 +394,7 @@ impl Default for HttpConfig {
 
 #[async_trait]
 impl ConfigurationSection for HttpConfig {
-    fn path() -> &'static str {
-        "http"
-    }
+    const PATH: Option<&'static str> = Some("http");
 
     async fn generate<R>(_rng: R) -> anyhow::Result<Self>
     where

crates/config/src/sections/matrix.rs

@@ -50,9 +50,7 @@ pub struct MatrixConfig {
 
 #[async_trait]
 impl ConfigurationSection for MatrixConfig {
-    fn path() -> &'static str {
-        "matrix"
-    }
+    const PATH: Option<&'static str> = Some("matrix");
 
     async fn generate<R>(mut rng: R) -> anyhow::Result<Self>
     where

crates/config/src/sections/mod.rs

@@ -116,10 +116,6 @@ pub struct RootConfig {
 
 #[async_trait]
 impl ConfigurationSection for RootConfig {
-    fn path() -> &'static str {
-        ""
-    }
-
     async fn generate<R>(mut rng: R) -> anyhow::Result<Self>
     where
         R: Rng + Send,
@@ -195,10 +191,6 @@ pub struct AppConfig {
 
 #[async_trait]
 impl ConfigurationSection for AppConfig {
-    fn path() -> &'static str {
-        ""
-    }
-
     async fn generate<R>(mut rng: R) -> anyhow::Result<Self>
     where
         R: Rng + Send,
@@ -251,10 +243,6 @@ pub struct SyncConfig {
 
 #[async_trait]
 impl ConfigurationSection for SyncConfig {
-    fn path() -> &'static str {
-        ""
-    }
-
     async fn generate<R>(mut rng: R) -> anyhow::Result<Self>
     where
         R: Rng + Send,

crates/config/src/sections/passwords.rs

@@ -57,9 +57,7 @@ impl Default for PasswordsConfig {
 
 #[async_trait]
 impl ConfigurationSection for PasswordsConfig {
-    fn path() -> &'static str {
-        "passwords"
-    }
+    const PATH: Option<&'static str> = Some("passwords");
 
     async fn generate<R>(_rng: R) -> anyhow::Result<Self>
     where

crates/config/src/sections/policy.rs

@@ -106,9 +106,7 @@ impl Default for PolicyConfig {
 
 #[async_trait]
 impl ConfigurationSection for PolicyConfig {
-    fn path() -> &'static str {
-        "policy"
-    }
+    const PATH: Option<&'static str> = Some("policy");
 
     async fn generate<R>(_rng: R) -> anyhow::Result<Self>
     where

crates/config/src/sections/secrets.rs

@@ -139,9 +139,7 @@ impl SecretsConfig {
 
 #[async_trait]
 impl ConfigurationSection for SecretsConfig {
-    fn path() -> &'static str {
-        "secrets"
-    }
+    const PATH: Option<&'static str> = Some("secrets");
 
     #[tracing::instrument(skip_all)]
     async fn generate<R>(mut rng: R) -> anyhow::Result<Self>

crates/config/src/sections/telemetry.rs

@@ -145,9 +145,7 @@ pub struct TelemetryConfig {
 
 #[async_trait]
 impl ConfigurationSection for TelemetryConfig {
-    fn path() -> &'static str {
-        "telemetry"
-    }
+    const PATH: Option<&'static str> = Some("telemetry");
 
     async fn generate<R>(_rng: R) -> anyhow::Result<Self>
     where

crates/config/src/sections/templates.rs

@@ -96,9 +96,7 @@ impl Default for TemplatesConfig {
 
 #[async_trait]
 impl ConfigurationSection for TemplatesConfig {
-    fn path() -> &'static str {
-        "templates"
-    }
+    const PATH: Option<&'static str> = Some("templates");
 
     async fn generate<R>(_rng: R) -> anyhow::Result<Self>
     where

crates/config/src/sections/upstream_oauth2.rs

@@ -34,9 +34,7 @@ pub struct UpstreamOAuth2Config {
 
 #[async_trait]
 impl ConfigurationSection for UpstreamOAuth2Config {
-    fn path() -> &'static str {
-        "upstream_oauth2"
-    }
+    const PATH: Option<&'static str> = Some("upstream_oauth2");
 
     async fn generate<R>(_rng: R) -> anyhow::Result<Self>
     where

crates/config/src/util.rs

@@ -22,7 +22,7 @@ use serde::{de::DeserializeOwned, Serialize};
 /// of the config and generate the sample config.
 pub trait ConfigurationSection: Sized + DeserializeOwned + Serialize {
     /// Specify where this section should live relative to the root.
-    fn path() -> &'static str;
+    const PATH: Option<&'static str> = None;
 
     /// Generate a sample configuration for this section.
     async fn generate<R>(rng: R) -> anyhow::Result<Self>
@@ -35,7 +35,11 @@ pub trait ConfigurationSection: Sized + DeserializeOwned + Serialize {
     ///
     /// Returns an error if the configuration could not be loaded
     fn extract(figment: &Figment) -> Result<Self, FigmentError> {
-        figment.extract_inner(Self::path())
+        if let Some(path) = Self::PATH {
+            figment.extract_inner(path)
+        } else {
+            figment.extract()
+        }
     }
 
     /// Generate config used in unit tests