add wasmbind feature

Author: bdemann

vm/Cargo.toml

@@ -23,6 +23,8 @@ ast = ["rustpython-ast"]
 codegen = ["rustpython-codegen", "ast"]
 parser = ["rustpython-parser", "ast"]
 serde = ["dep:serde"]
+wasmbind = ["chrono/wasmbind", "getrandom/js"]
+
 
 [dependencies]
 rustpython-compiler = { workspace = true, optional = true }

vm/src/stdlib/time.rs

@@ -104,15 +104,19 @@ mod decl {
 
     #[cfg(all(target_arch = "wasm32", not(target_os = "wasi")))]
     fn _time(_vm: &VirtualMachine) -> PyResult<f64> {
-        use wasm_bindgen::prelude::*;
-        #[wasm_bindgen]
-        extern "C" {
-            type Date;
-            #[wasm_bindgen(static_method_of = Date)]
-            fn now() -> f64;
+        #[cfg(feature = "wasmbind")]
+        {
+            use wasm_bindgen::prelude::*;
+            #[wasm_bindgen]
+            extern "C" {
+                type Date;
+                #[wasm_bindgen(static_method_of = Date)]
+                fn now() -> f64;
+            }
+            // Date.now returns unix time in milliseconds, we want it in seconds
+            return Ok(Date::now() / 1000.0);
         }
-        // Date.now returns unix time in milliseconds, we want it in seconds
-        Ok(Date::now() / 1000.0)
+        panic!("Date not available")
     }
 
     #[pyfunction]

vm/src/vm/vm_object.rs

@@ -21,15 +21,18 @@ impl VirtualMachine {
         }
         #[cfg(all(target_arch = "wasm32", not(target_os = "wasi")))]
         {
-            use wasm_bindgen::prelude::*;
-            #[wasm_bindgen]
-            extern "C" {
-                #[wasm_bindgen(js_namespace = console)]
-                fn error(s: &str);
+            #[cfg(feature = "wasmbind")]
+            {
+                use wasm_bindgen::prelude::*;
+                #[wasm_bindgen]
+                extern "C" {
+                    #[wasm_bindgen(js_namespace = console)]
+                    fn error(s: &str);
+                }
+                let mut s = String::new();
+                self.write_exception(&mut s, &exc).unwrap();
+                error(&s);
             }
-            let mut s = String::new();
-            self.write_exception(&mut s, &exc).unwrap();
-            error(&s);
             panic!("{}; exception backtrace above", msg)
         }
     }