fix: build fixes for WASM language runtime + LanguageBackend trait

- Fix schema.gql symlink (core/lib/src -> tests/js)
- Fix AgentContext/did_for_context/sign_for_context -> agent::did()/sign()
- Fix create_signed_expression to use 1-arg API
- Remove conflicting From<WasmLanguageError> impl (blanket covers it)
- Fix perspective_instance to use Box<dyn LanguageBackend> in Arc<Mutex<>>
- Add set_app_data_path to perspectives/mod.rs (merge gap)
- Forward wasm-languages feature through cli/Cargo.toml

Author: HexaField

cli/Cargo.toml

@@ -25,6 +25,7 @@ path = "src/ad4m_executor.rs"
 # Pass metal and cuda features through to ad4m-executor
 metal = ["ad4m-executor/metal"]
 cuda = ["ad4m-executor/cuda"]
+wasm-languages = ["ad4m-executor/wasm-languages"]
 
 [dependencies]
 ad4m-client = { path = "../rust-client", version="0.11.1" }

rust-client/schema.gql

@@ -1 +1 @@
-../core/lib/src/schema.gql
+../tests/js/schema.gql

rust-executor/src/perspectives/mod.rs

@@ -486,3 +486,16 @@ mod tests {
 
     // Additional tests for other functions can be added here
 }
+
+lazy_static! {
+    static ref APP_DATA_PATH: std::sync::RwLock<Option<String>> = std::sync::RwLock::new(None);
+}
+
+pub fn set_app_data_path(path: String) {
+    let mut data_path = APP_DATA_PATH.write().unwrap();
+    *data_path = Some(path);
+}
+
+fn get_app_data_path() -> Option<String> {
+    APP_DATA_PATH.read().unwrap().clone()
+}

rust-executor/src/perspectives/perspective_instance.rs

@@ -177,7 +177,7 @@ pub struct PerspectiveInstance {
     is_teardown: Arc<Mutex<bool>>,
     sdna_change_mutex: Arc<Mutex<()>>,
     prolog_update_mutex: Arc<RwLock<()>>,
-    link_language: Arc<RwLock<Option<Arc<Mutex<dyn LanguageBackend>>>>>,
+    link_language: Arc<RwLock<Option<Arc<Mutex<Box<dyn LanguageBackend>>>>>>,
     trigger_notification_check: Arc<Mutex<bool>>,
     trigger_prolog_subscription_check: Arc<Mutex<bool>>,
     trigger_surreal_subscription_check: Arc<Mutex<bool>>,

rust-executor/src/wasm_core/error.rs

@@ -128,8 +128,4 @@ impl From<std::string::FromUtf8Error> for WasmLanguageError {
     }
 }
 
-impl From<WasmLanguageError> for deno_core::error::AnyError {
-    fn from(err: WasmLanguageError) -> Self {
-        deno_core::anyhow::anyhow!("{}", err)
-    }
-}
+// From<WasmLanguageError> for AnyError covered by blanket impl

rust-executor/src/wasm_core/mod.rs

@@ -105,7 +105,7 @@ fn alloc_and_write(
 /// Returns the agent's DID as a JSON string.
 fn host_agent_did(mut env: FunctionEnvMut<HostEnv>) -> u64 {
     let (host_env, mut store) = env.data_and_store_mut();
-    match crate::agent::did_for_context(&crate::agent::AgentContext::main_agent()) {
+    match Ok::<_, deno_core::error::AnyError>(crate::agent::did()) {
         Ok(did) => {
             let json = match serde_json::to_vec(&did) {
                 Ok(j) => j,
@@ -148,7 +148,7 @@ fn host_agent_sign(mut env: FunctionEnvMut<HostEnv>, data_ptr: u32, data_len: u3
             return 0;
         }
     };
-    match crate::agent::sign_for_context(&data, &crate::agent::AgentContext::main_agent()) {
+    match crate::agent::sign(&data) {
         Ok(signature) => {
             let json = match serde_json::to_vec(&signature) {
                 Ok(j) => j,
@@ -248,7 +248,7 @@ fn host_agent_create_signed_expression(
         }
     };
     let sorted = crate::js_core::utils::sort_json_value(&content);
-    match crate::agent::create_signed_expression(sorted, &crate::agent::AgentContext::main_agent()) {
+    match crate::agent::create_signed_expression(sorted) {
         Ok(expr) => {
             let json = match serde_json::to_vec(&expr) {
                 Ok(j) => j,