fix: load wasm

crates/mako/Cargo.toml

@@ -114,6 +114,7 @@ tracing               = "0.1.37"
 tracing-subscriber    = { version = "0.3.17", features = ["env-filter"] }
 tungstenite           = "0.19.0"
 twox-hash             = "1.6.3"
+wasmparser            = "0.207.0"
 
 [dev-dependencies]
 insta  = { version = "1.30.0", features = ["yaml"] }

crates/mako/src/build/load.rs

@@ -36,7 +36,6 @@ const CSS_EXTENSIONS: [&str; 1] = ["css"];
 const JSON_EXTENSIONS: [&str; 2] = ["json", "json5"];
 const YAML_EXTENSIONS: [&str; 2] = ["yaml", "yml"];
 const XML_EXTENSIONS: [&str; 1] = ["xml"];
-const WASM_EXTENSIONS: [&str; 1] = ["wasm"];
 const TOML_EXTENSIONS: [&str; 1] = ["toml"];
 const SVG_EXTENSIONS: [&str; 1] = ["svg"];
 const MD_EXTENSIONS: [&str; 2] = ["md", "mdx"];
@@ -180,27 +179,6 @@ export function moduleToDom(css) {
             }));
         }
 
-        // wasm
-        if WASM_EXTENSIONS.contains(&file.extname.as_str()) {
-            let final_file_name = format!(
-                "{}.{}.{}",
-                file.get_file_stem(),
-                file.get_content_hash()?,
-                file.extname
-            );
-            context.emit_assets(
-                file.pathname.to_string_lossy().to_string(),
-                final_file_name.clone(),
-            );
-            return Ok(Content::Js(JsContent {
-                content: format!(
-                    "module.exports = require._interopreRequireWasm(exports, \"{}\")",
-                    final_file_name
-                ),
-                ..Default::default()
-            }));
-        }
-
         // xml
         if XML_EXTENSIONS.contains(&file.extname.as_str()) {
             let content = FileSystem::read_file(&file.pathname)?;

crates/mako/src/plugins/wasm_runtime.rs

@@ -1,12 +1,19 @@
+use std::collections::HashMap;
+use std::fs::File;
+use std::io::Read;
 use std::sync::Arc;
 
 use anyhow;
+use wasmparser::{Import, Parser, Payload};
 
+use crate::ast::file::{Content, JsContent};
 use crate::compiler::Context;
-use crate::plugin::Plugin;
+use crate::plugin::{Plugin, PluginLoadParam};
 
 pub struct WasmRuntimePlugin {}
 
+const WASM_EXTENSIONS: [&str; 1] = ["wasm"];
+
 impl Plugin for WasmRuntimePlugin {
     fn name(&self) -> &str {
         "wasm_runtime"
@@ -27,4 +34,139 @@ impl Plugin for WasmRuntimePlugin {
             Ok(vec![])
         }
     }
+
+    fn load(
+        &self,
+        param: &PluginLoadParam,
+        _context: &Arc<Context>,
+    ) -> anyhow::Result<Option<Content>> {
+        let file = param.file;
+
+        if WASM_EXTENSIONS.contains(&file.extname.as_str()) {
+            let final_file_name = format!(
+                "{}.{}.{}",
+                file.get_file_stem(),
+                file.get_content_hash()?,
+                file.extname
+            );
+            _context.emit_assets(
+                file.pathname.to_string_lossy().to_string(),
+                final_file_name.clone(),
+            );
+
+            let mut buffer = Vec::new();
+            File::open(&file.path)?.read_to_end(&mut buffer)?;
+            // Parse wasm file to get imports
+            let mut wasm_import_object_map: HashMap<&str, Vec<String>> = HashMap::new();
+            Parser::new(0).parse_all(&buffer).for_each(|payload| {
+                if let Ok(Payload::ImportSection(imports)) = payload {
+                    imports.into_iter_with_offsets().for_each(|import| {
+                        if let Ok((
+                            _,
+                            Import {
+                                module,
+                                name,
+                                ty: _,
+                            },
+                        )) = import
+                        {
+                            if let Some(import_object) = wasm_import_object_map.get_mut(module) {
+                                import_object.push(name.to_string());
+                            } else {
+                                wasm_import_object_map.insert(module, vec![name.to_string()]);
+                            }
+                        }
+                    });
+                }
+            });
+
+            let mut module_import_code = String::new();
+            let mut wasm_import_object_code = String::new();
+
+            for (index, (key, value)) in wasm_import_object_map.iter().enumerate() {
+                module_import_code.push_str(&format!(
+                    "import * as module{module_idx} from \"{module}\";\n",
+                    module_idx = index,
+                    module = key
+                ));
+
+                wasm_import_object_code.push_str(&format!(
+                    "\"{module}\": {{ {names} }}",
+                    module = key,
+                    names = value
+                        .iter()
+                        .map(|name| format!("\"{}\": module{}[\"{}\"]", name, index, name))
+                        .collect::<Vec<String>>()
+                        .join(", ")
+                ));
+            }
+
+            let mut content = String::new();
+            content.push_str(&module_import_code);
+
+            if wasm_import_object_code.is_empty() {
+                content.push_str(&format!(
+                    "module.exports = require._interopreRequireWasm(exports, \"{}\")",
+                    final_file_name
+                ));
+            } else {
+                content.push_str(&format!(
+                    "module.exports = require._interopreRequireWasm(exports, \"{}\", {{{}}})",
+                    final_file_name, wasm_import_object_code
+                ));
+            }
+
+            return Ok(Some(Content::Js(JsContent {
+                content,
+                ..Default::default()
+            })));
+        }
+
+        Ok(None)
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use std::sync::Arc;
+
+    use super::*;
+    use crate::ast::file::File;
+    use crate::compiler::Context;
+
+    #[test]
+    fn test_wasm_runtime_load_with_import_object() {
+        let plugin = WasmRuntimePlugin {};
+        let context = Arc::new(Context {
+            ..Default::default()
+        });
+        let wasm_relative_path =
+            std::path::Path::new("../../examples/import-resources/minus-wasm-pack/index_bg.wasm");
+        let wasm_path = std::fs::canonicalize(wasm_relative_path).unwrap();
+        let file = File::new(wasm_path.to_string_lossy().to_string(), context.clone());
+        let param = PluginLoadParam { file: &file };
+        let result: Option<Content> = plugin.load(&param, &context).unwrap();
+
+        assert!(result.is_some());
+        if let Some(Content::Js(js_content)) = result {
+            assert!(js_content.content.contains("import * as module0 from"));
+        }
+    }
+
+    #[test]
+    fn test_wasm_runtime_load_without_import_object() {
+        let plugin = WasmRuntimePlugin {};
+        let context = Arc::new(Context {
+            ..Default::default()
+        });
+        let wasm_relative_path = std::path::Path::new("../../examples/import-resources/add.wasm");
+        let wasm_path = std::fs::canonicalize(wasm_relative_path).unwrap();
+        let file = File::new(wasm_path.to_string_lossy().to_string(), context.clone());
+        let param = PluginLoadParam { file: &file };
+        let result = plugin.load(&param, &context).unwrap();
+        assert!(result.is_some());
+        if let Some(Content::Js(js_content)) = result {
+            assert!(!js_content.content.contains("import * as module0 from"))
+        }
+    }
 }

examples/import-resources/import-js-wasm/index.d.ts

@@ -0,0 +1,3 @@
+/* tslint:disable */
+/* eslint-disable */
+export function run(): void;

examples/import-resources/import-js-wasm/index.js

@@ -0,0 +1,5 @@
+import * as wasm from './index_bg.wasm';
+export * from './index_bg.js';
+import { __wbg_set_wasm } from './index_bg.js';
+__wbg_set_wasm(wasm);
+wasm.__wbindgen_start();