wasm shell + destructuring

src/ir/compiler_hooks.zig

@@ -10,6 +10,7 @@ const Interpreter = interp_mod.Interpreter;
 pub const BuildConfig = struct {
     link_flags: std.ArrayList([]const u8) = .empty,
     output_path: ?[]const u8 = null,
+    wasm_shell_path: ?[]const u8 = null,
 
     pub fn deinit(self: *BuildConfig, alloc: Allocator) void {
         self.link_flags.deinit(alloc);
@@ -52,6 +53,7 @@ pub const Registry = struct {
         self.hooks.put("build_options", &hookBuildOptions) catch {};
         self.hooks.put("BuildOptions.add_link_flag", &hookAddLinkFlag) catch {};
         self.hooks.put("BuildOptions.set_output_path", &hookSetOutputPath) catch {};
+        self.hooks.put("BuildOptions.set_wasm_shell", &hookSetWasmShell) catch {};
     }
 };
 
@@ -99,3 +101,18 @@ fn hookSetOutputPath(
     }
     return .void_val;
 }
+
+fn hookSetWasmShell(
+    interp: *const Interpreter,
+    args: []const Value,
+    bc: *BuildConfig,
+    alloc: Allocator,
+) HookError!Value {
+    // args: [self (BuildOptions value), path_string]
+    if (args.len < 2) return .void_val;
+    const str_val = args[1];
+    if (str_val.asString(interp)) |s| {
+        bc.wasm_shell_path = alloc.dupe(u8, s) catch return error.CannotEvalComptime;
+    }
+    return .void_val;
+}