Fix pedantic clippy lints

Cargo.toml

@@ -25,3 +25,6 @@ glob = "0.3"
 anyhow = "1.0.98"
 axum = "0.8.3"
 tokio = { version = "1.44.2", features = ["full"] }
+
+[lints.clippy]
+pedantic = "warn"

examples/advanced/api/files/[...path]/route.rs

@@ -1,5 +1,5 @@
 use axum::{extract::Path, response::IntoResponse};
 
 pub async fn get(Path(path): Path<String>) -> impl IntoResponse {
-    format!("Requested file path: {}", path)
+    format!("Requested file path: {path}")
 }

examples/advanced/api/users/[id]/route.rs

@@ -1,5 +1,5 @@
 use axum::{extract::Path, response::IntoResponse};
 
 pub async fn get(Path(id): Path<String>) -> impl IntoResponse {
-    format!("User ID: {}", id)
+    format!("User ID: {id}")
 }

examples/advanced/server.rs

@@ -13,7 +13,7 @@ struct MyFolderRouter();
 pub async fn server() -> anyhow::Result<()> {
     // Create app state
     let app_state = AppState {
-        _foo: "".to_string(),
+        _foo: String::new(),
     };
 
     // Use the init fn generated above

examples/simple/main.rs

@@ -14,7 +14,7 @@ struct MyFolderRouter();
 async fn main() -> anyhow::Result<()> {
     // Create app state
     let app_state = AppState {
-        _foo: "".to_string(),
+        _foo: String::new(),
     };
 
     // Use the init fn generated above

src/lib.rs

@@ -177,6 +177,7 @@ impl ModuleDir {
         }
     }
 }
+
 /// Creates an Axum router module tree & creation function
 /// by scanning a directory for `route.rs` files.
 ///
@@ -200,7 +201,7 @@ pub fn folder_router(attr: TokenStream, item: TokenStream) -> TokenStream {
     let state_type = args.state_type;
 
     // Get the project root directory
-    let manifest_dir = std::env::var("CARGO_MANIFEST_DIR").unwrap();
+    let manifest_dir = std::env::var("CARGO_MANIFEST_DIR").unwrap_or("./".to_string());
     let base_dir = Path::new(&manifest_dir).join(&base_path);
 
     // Collect route files
@@ -216,18 +217,15 @@ pub fn folder_router(attr: TokenStream, item: TokenStream) -> TokenStream {
         });
     }
 
-    fn replace_special_chars(input: &str) -> String {
-        input
-            .chars()
-            .map(|c| if c.is_alphanumeric() { c } else { '_' })
-            .collect()
-    }
-
     // Build module tree
     let mut root = ModuleDir::new(&format!(
         "__folder_router_{}",
-        replace_special_chars(&base_path)
+        base_path
+            .chars()
+            .map(|c| if c.is_alphanumeric() { c } else { '_' })
+            .collect::<String>()
     ));
+
     for (route_path, rel_path) in &routes {
         add_to_module_tree(&mut root, rel_path, route_path);
     }
@@ -235,7 +233,10 @@ pub fn folder_router(attr: TokenStream, item: TokenStream) -> TokenStream {
     // Generate module tree
     let root_mod_ident = format_ident!("{}", root.name);
 
-    let base_path_lit = LitStr::new(base_dir.to_str().unwrap(), proc_macro2::Span::call_site());
+    let base_path_lit = LitStr::new(
+        base_dir.to_str().unwrap_or("./"),
+        proc_macro2::Span::call_site(),
+    );
     let mod_hierarchy = generate_module_hierarchy(&root);
 
     // Generate route registrations
@@ -314,15 +315,13 @@ pub fn folder_router(attr: TokenStream, item: TokenStream) -> TokenStream {
 /// it returns: `vec!["get"]`
 fn methods_for_route(route_path: &PathBuf) -> Vec<&'static str> {
     // Read the file content
-    let file_content = match fs::read_to_string(route_path) {
+    let Ok(file_content) = fs::read_to_string(route_path) else {
-        Ok(content) => content,
+        return Vec::new();
-        Err(_) => return Vec::new(),
     };
 
     // Parse the file content into a syn syntax tree
-    let file = match parse_file(&file_content) {
+    let Ok(file) = parse_file(&file_content) else {
-        Ok(file) => file,
+        return Vec::new();
-        Err(_) => return Vec::new(),
     };
 
     // Define HTTP methods we're looking for
@@ -433,9 +432,9 @@ fn normalize_module_name(name: &str) -> String {
     if name.starts_with('[') && name.ends_with(']') {
         let inner = &name[1..name.len() - 1];
         if let Some(stripped) = inner.strip_prefix("...") {
-            format!("___{}", stripped)
+            format!("___{stripped}")
         } else {
-            format!("__{}", inner)
+            format!("__{inner}")
         }
     } else {
         name.replace(['-', '.'], "_")
@@ -469,12 +468,12 @@ fn path_to_module_path(rel_path: &Path) -> (String, Vec<String>) {
             if segment.starts_with('[') && segment.ends_with(']') {
                 let param = &segment[1..segment.len() - 1];
                 if let Some(stripped) = param.strip_prefix("...") {
-                    axum_path.push_str(&format!("/{{*{}}}", stripped));
+                    axum_path = format!("/{{*{stripped}}}");
                 } else {
-                    axum_path.push_str(&format!("/{{:{}}}", param));
+                    axum_path = format!("/{{:{param}}}");
                 }
             } else {
-                axum_path.push_str(&format!("/{}", segment));
+                axum_path = format!("/{segment}");
             }
         }
     }