fix: replace .unwrap() with .expect() in spawn calls and build.rs

build.rs

@@ -4,31 +4,50 @@ use std::fs;
 
 fn main() {
     let board_dir = "src/board";
-    let boards: Vec<String> = fs::read_dir(board_dir).unwrap()
+    let boards: Vec<String> = fs::read_dir(board_dir)
+        .expect("failed to read src/board directory")
         .filter_map(|e| {
             let p = e.ok()?.path();
             if p.is_file() && p.extension()? == "rs" && p.file_stem()? != "mod" {
                 return Some(p.file_stem()?.to_str()?.to_string());
             }
             None
-        }).collect();
+        })
+        .collect();
 
     let enabled: Vec<_> = std::env::vars()
         .filter(|(k, _)| k.starts_with("CARGO_FEATURE_"))
         .map(|(k, _)| k.replace("CARGO_FEATURE_", "").to_lowercase())
-        .filter(|f| boards.contains(f)).collect();
+        .filter(|f| boards.contains(f))
+        .collect();
 
     match enabled.len() {
-        0 => panic!("\n\n{}\n", format!("No board selected! Found: {:?}", boards).red().bold()),
+        0 => panic!(
+            "\n\n{}\n",
+            format!("No board selected! Found: {:?}", boards)
+                .red()
+                .bold()
+        ),
         1 => println!("cargo:rustc-cfg=board_selected"),
-        _ => panic!("\n\n{}\n", format!("Conflict: Multiple boards enabled {:?}", enabled).yellow().bold()),
+        _ => panic!(
+            "\n\n{}\n",
+            format!("Conflict: Multiple boards enabled {:?}", enabled)
+                .yellow()
+                .bold()
+        ),
     }
 
     let mut env = Environment::new();
-    let template = fs::read_to_string("src/board/mod.rs.j2").expect("Missing template .j2");
-    env.add_template("mod", &template).unwrap();
-    let rendered = env.get_template("mod").unwrap().render(context!(boards => boards)).unwrap();
-    fs::write("src/board/mod.rs", rendered).unwrap();
+    let template =
+        fs::read_to_string("src/board/mod.rs.j2").expect("missing src/board/mod.rs.j2");
+    env.add_template("mod", &template)
+        .expect("failed to parse board template");
+    let rendered = env
+        .get_template("mod")
+        .expect("template not found")
+        .render(context!(boards => boards))
+        .expect("failed to render board module");
+    fs::write("src/board/mod.rs", rendered).expect("failed to write src/board/mod.rs");
 
     println!("cargo:rerun-if-changed=src/board/mod.rs.j2");
     println!("cargo:rerun-if-changed={}", board_dir);