make task.$T.path mandatory

macros/src/check.rs

@@ -49,7 +49,7 @@ pub enum Kind {
 
 pub struct Task {
     pub kind: Kind,
-    pub path: Option<Path>,
+    pub path: Path,
     pub priority: u8,
     pub resources: Idents,
 }
@@ -122,7 +122,7 @@ fn task(name: &str, task: syntax::check::Task) -> Result<Task> {
 
     Ok(Task {
         kind,
-        path: task.path,
+        path: task.path.ok_or("`path` field is missing")?,
         priority: task.priority.unwrap_or(1),
         resources: task.resources,
     })

macros/src/trans.rs

@@ -603,7 +603,6 @@ fn tasks(app: &App, ownerships: &Ownerships, root: &mut Vec<Tokens>) {
             });
         }
 
-        if let Some(path) = task.path.as_ref() {
         let mut tys = vec![];
         let mut exprs = vec![];
 
@@ -624,6 +623,7 @@ fn tasks(app: &App, ownerships: &Ownerships, root: &mut Vec<Tokens>) {
             exprs.push(quote!(#name::Resources::new()));
         }
 
+        let path = &task.path;
         let _name = Ident::new(format!("_{}", name));
         let export_name =
             Lit::Str(name.as_ref().to_owned(), StrStyle::Cooked);
@@ -637,32 +637,6 @@ fn tasks(app: &App, ownerships: &Ownerships, root: &mut Vec<Tokens>) {
                 f(#(#exprs,)*)
             }
         });
-        } else if !has_resources {
-            items.push(quote! {
-                pub struct Resources {
-                    _0: (),
-                }
-
-                impl Resources {
-                    pub unsafe fn new() -> Self {
-                        Resources { _0: () }
-                    }
-                }
-            });
-            // the `task!` macro will be used so the `#NAME::Resources` type
-            // must exist
-        }
-
-        let priority = task.priority;
-        if task.path.is_none() {
-            // This `const`ant is mainly used to make sure the user doesn't
-            // forget to set a task handler using the `task!` macro. They'll get
-            // an error if they do.
-            items.push(quote! {
-                #[deny(dead_code)]
-                pub const #name: u8 = #priority;
-            });
-        }
 
         root.push(quote!{
             #[allow(non_snake_case)]