Add ability to run on Apple silicon

.gitignore

@@ -5,3 +5,4 @@ package-lock.json
 yarn-error.log
 /typescript
 /example-multi
+.DS_Store

README.md

@@ -134,6 +134,11 @@ rust({
 
     // Allows you to customize the behavior for loading the .wasm file, this is for advanced users only!
     importHook: function (path) { return JSON.stringify(path); },
+
+    // Allows you to define a custom path to wasm-pack.
+    // If the path starts with '~' it will be converted to `os.homedir()`
+    // eg. "~/.cargo/bin/wasm-pack -> "/Users/user_name/.cargo/bin/wasm-pack"
+    wasmPackPath: "node_modules/.bin/wasm-pack"
 })
 ```
 

example/Cargo.toml

@@ -15,5 +15,5 @@ console_error_panic_hook = "0.1.6"
 [dependencies.web-sys]
 version = "0.3.35"
 features = [
-    "console",
-]
+    "console"
+]

example/package.json

@@ -11,4 +11,4 @@
     "rimraf": "^3.0.2",
     "rollup": "^1.31.0"
   }
-}
+}

index.js

@@ -4,6 +4,7 @@ const $path = require("path");
 const $child = require("child_process");
 const $toml = require("toml");
 const $rimraf = require("rimraf");
+const $os = require("os");
 const { createFilter } = require("rollup-pluginutils");
 
 
@@ -128,6 +129,21 @@ async function get_target_dir(dir) {
     //return JSON.parse(metadata).target_directory;
 }
 
+function wasm_pack_path(options) {
+    if (options.wasmPackPath !== undefined) {
+        if (typeof (options.wasmPackPath) === "string") {
+            // Quick hack to allow use of "~" for home directory?
+            return (options.wasmPackPath.startsWith("~") ? options.wasmPackPath.replace("~", $os.homedir()) : options.wasmPackPath);
+        } else {
+            throw new Error("'wasmPackPath' must be a string")
+        }
+    } else if (process.platform === "win32") {
+        // TODO pretty hacky, but needed to make it work on Windows
+        return "wasm-pack.cmd"
+    } else {
+        return "wasm-pack"
+    }
+}
 
 async function wasm_pack(cx, state, dir, source, id, options) {
     const target_dir = await get_target_dir(dir);
@@ -150,8 +166,7 @@ async function wasm_pack(cx, state, dir, source, id, options) {
         "--",
     ].concat(options.cargoArgs);
 
-    // TODO pretty hacky, but needed to make it work on Windows
-    const command = (process.platform === "win32" ? "wasm-pack.cmd" : "wasm-pack");
+    const command = wasm_pack_path(options);
 
     try {
         // TODO what if it tries to build the same crate multiple times ?

package.json

@@ -25,7 +25,9 @@
     "glob": "^7.1.6",
     "rimraf": "^3.0.0",
     "rollup-pluginutils": "^2.8.2",
-    "toml": "^3.0.0",
+    "toml": "^3.0.0"
+  },
+  "optionalDependencies": {
     "wasm-pack": "^0.10.0"
   }
-}
+}