Fix pedantic clippy lints

Cargo.lock

@@ -90,6 +90,7 @@ dependencies = [
  "anyhow",
  "axum",
  "glob",
+ "macrotest",
  "proc-macro2",
  "quote",
  "syn",
@@ -129,6 +130,24 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
+[[package]]
+name = "diff"
+version = "0.1.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "56254986775e3233ffa9c4d7d3faaf6d36a2c09d30b20687e9f88bc8bafc16c8"
+
+[[package]]
+name = "equivalent"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "877a4ace8713b0bcf2a4e7eec82529c029f1d0619886d18145fea96c3ffe5c0f"
+
+[[package]]
+name = "fastrand"
+version = "2.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "37909eebbb50d72f9059c3b6d82c0463f2ff062c9e95845c43a6c9c0355411be"
+
 [[package]]
 name = "fnv"
 version = "1.0.7"
@@ -189,6 +208,12 @@ version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a8d1add55171497b4705a648c6b583acafb01d58050a51727785f0b2c8e0a2b2"
 
+[[package]]
+name = "hashbrown"
+version = "0.15.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bf151400ff0baff5465007dd2f3e717f3fe502074ca563069ce3a6629d07b289"
+
 [[package]]
 name = "http"
 version = "1.3.1"
@@ -270,6 +295,16 @@ dependencies = [
  "tower-service",
 ]
 
+[[package]]
+name = "indexmap"
+version = "2.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cea70ddb795996207ad57735b50c5982d8844f38ba9ee5f1aedcfb708a2aa11e"
+dependencies = [
+ "equivalent",
+ "hashbrown",
+]
+
 [[package]]
 name = "itoa"
 version = "1.0.15"
@@ -298,6 +333,23 @@ version = "0.4.27"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "13dc2df351e3202783a1fe0d44375f7295ffb4049267b0f3018346dc122a1d94"
 
+[[package]]
+name = "macrotest"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f0597a8d49ceeea5845b12d1970aa993261e68d4660b327eabab667b3e7ffd60"
+dependencies = [
+ "diff",
+ "fastrand",
+ "glob",
+ "prettyplease",
+ "serde",
+ "serde_derive",
+ "serde_json",
+ "syn",
+ "toml_edit",
+]
+
 [[package]]
 name = "matchit"
 version = "0.8.4"
@@ -392,6 +444,16 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8b870d8c151b6f2fb93e84a13146138f05d02ed11c7e7c54f8826aaaf7c9f184"
 
+[[package]]
+name = "prettyplease"
+version = "0.2.32"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "664ec5419c51e34154eec046ebcba56312d5a2fc3b09a06da188e1ad21afadf6"
+dependencies = [
+ "proc-macro2",
+ "syn",
+]
+
 [[package]]
 name = "proc-macro2"
 version = "1.0.94"
@@ -485,6 +547,15 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "serde_spanned"
+version = "0.6.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "87607cb1398ed59d48732e575a4c28a7a8ebf2454b964fe3f224f2afc07909e1"
+dependencies = [
+ "serde",
+]
+
 [[package]]
 name = "serde_urlencoded"
 version = "0.7.1"
@@ -568,6 +639,28 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "toml_datetime"
+version = "0.6.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0dd7358ecb8fc2f8d014bf86f6f638ce72ba252a2c3a2572f2a795f1d23efb41"
+dependencies = [
+ "serde",
+]
+
+[[package]]
+name = "toml_edit"
+version = "0.22.24"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "17b4795ff5edd201c7cd6dca065ae59972ce77d1b80fa0a84d94950ece7d1474"
+dependencies = [
+ "indexmap",
+ "serde",
+ "serde_spanned",
+ "toml_datetime",
+ "winnow",
+]
+
 [[package]]
 name = "tower"
 version = "0.5.2"
@@ -700,3 +793,12 @@ name = "windows_x86_64_msvc"
 version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "589f6da84c646204747d1270a2a5661ea66ed1cced2631d546fdfb155959f9ec"
+
+[[package]]
+name = "winnow"
+version = "0.7.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "63d3fcd9bba44b03821e7d699eeee959f3126dcc4aa8e4ae18ec617c2a5cea10"
+dependencies = [
+ "memchr",
+]

Cargo.toml

@@ -20,8 +20,12 @@ syn = { version = "2.0", features = ["full"] }
 quote = "1.0"
 proc-macro2 = "1.0"
 glob = "0.3"
+macrotest = "1.1.0"
 
 [dev-dependencies]
 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/main.rs

@@ -5,3 +5,4 @@ async fn main() -> anyhow::Result<()> {
     server::server().await?;
     Ok(())
 }
+

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

flake.nix

@@ -73,6 +73,7 @@
               cargo-outdated
               cargo-release
               cargo-readme
+              cargo-expand
               calc
               fish
               inotify-tools
@@ -93,7 +94,8 @@
         packages = {
           # default = pkgs.callPackage ./package.nix { };
         };
-      }) // {
+      })
+    // {
       hydraJobs =
         let
           system = "x86_64-linux";

src/lib.rs

@@ -124,6 +124,7 @@
 //!   It is highly recommended to keep the route directory seperate from the rest of your module-tree.
 use std::{
     collections::HashMap,
+    fmt::Write,
     fs,
     path::{Path, PathBuf},
 };
@@ -177,6 +178,7 @@ impl ModuleDir {
         }
     }
 }
+
 /// Creates an Axum router module tree & creation function
 /// by scanning a directory for `route.rs` files.
 ///
@@ -200,7 +202,7 @@ 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 +218,22 @@ pub fn folder_router(attr: TokenStream, item: TokenStream) -> TokenStream {
         });
     }
 
-    fn replace_special_chars(input: &str) -> String {
-        input
+    // Build module tree
+    // avoid conflicts by interpolating struct name & path
+    let mut root = ModuleDir::new(&format!(
+        "__folder_router__{}__{}",
+        struct_name
+            .to_string()
             .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)
+            .map(|c| c.to_ascii_lowercase())
+            .collect::<String>(),
+        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 +241,10 @@ 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 +323,13 @@ 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) {
-        Ok(content) => content,
-        Err(_) => return Vec::new(),
+    let Ok(file_content) = fs::read_to_string(route_path) else {
+        return Vec::new();
     };
 
     // Parse the file content into a syn syntax tree
-    let file = match parse_file(&file_content) {
-        Ok(file) => file,
-        Err(_) => return Vec::new(),
+    let Ok(file) = parse_file(&file_content) else {
+        return Vec::new();
     };
 
     // Define HTTP methods we're looking for
@@ -433,9 +440,9 @@ 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 +476,12 @@ 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));
+                    write!(&mut axum_path, "/{{*{stripped}}}").unwrap();
                 } else {
-                    axum_path.push_str(&format!("/{{:{}}}", param));
+                    write!(&mut axum_path, "/{{:{param}}}").unwrap();
                 }
             } else {
-                axum_path.push_str(&format!("/{}", segment));
+                write!(&mut axum_path, "/{segment}").unwrap();
             }
         }
     }

tests/expand/examples

@@ -0,0 +1 @@
+../../examples

tests/tests.rs

@@ -0,0 +1,4 @@
+#[test]
+pub fn expand_examples_pass() {
+    macrotest::expand("test/expand/**/*.rs");
+}