fix npm build

mod_test.ts

@@ -1,4 +1,5 @@
 import { assertEquals } from "@std/assert";
+import * as fs from "node:fs";
 import { createFromBuffer, createStreaming, type Formatter, type GlobalConfiguration } from "./mod.ts";
 
 Deno.test("it should create streaming", async () => {
@@ -107,7 +108,7 @@ function runGeneralJsonFormatterTests(formatter: Formatter) {
 Deno.test("should support v4", () => {
   // this plugin file's code is here: https://github.com/dprint/dprint/blob/main/crates/test-plugin/src/lib.rs
   const formatter = createFromBuffer(
-    Deno.readFileSync(new URL("./test/test_plugin_v4.wasm", import.meta.url)),
+    fs.readFileSync(new URL("./test/test_plugin_v4.wasm", import.meta.url)),
   );
 
   formatter.setConfig({}, { "ending": "formatted_wasm" });

scripts/build_npm.ts

@@ -1,4 +1,11 @@
-import { build } from "@deno/dnt";
+import { build, emptyDir } from "@deno/dnt";
+
+const wasmFileLocations = [
+  "npm/script/test",
+  "npm/esm/test",
+];
+
+await emptyDir("npm");
 
 await build({
   entryPoints: ["mod.ts"],
@@ -20,6 +27,12 @@ await build({
   compilerOptions: {
     lib: ["ES2021", "DOM"],
   },
+  postBuild: () => {
+    for (const location of wasmFileLocations) {
+      Deno.mkdirSync(location, { recursive: true });
+      Deno.copyFileSync("test/test_plugin_v4.wasm", location + "/test_plugin_v4.wasm");
+    }
+  },
   package: {
     name: "@dprint/formatter",
     version: Deno.args[0],
@@ -44,3 +57,7 @@ await build({
 
 Deno.copyFileSync("LICENSE", "npm/LICENSE");
 Deno.copyFileSync("README.md", "npm/README.md");
+
+for (const location of wasmFileLocations) {
+  Deno.removeSync(location + "/test_plugin_v4.wasm");
+}

v4.ts

@@ -1,5 +1,5 @@
 import type { FormatRequest, Formatter, GlobalConfiguration, Host, PluginInfo } from "./common.ts";
-import { FileMatchingInfo } from "./mod.ts";
+import type { FileMatchingInfo } from "./mod.ts";
 
 const decoder = new TextDecoder();
 const encoder = new TextEncoder();
@@ -8,6 +8,22 @@ const encoder = new TextEncoder();
  * Creates host for host formatting.
  */
 export function createHost(): Host {
+  function writeStderr(buf: Uint8Array) {
+    try {
+      // deno-lint-ignore no-explicit-any
+      const global = globalThis as any;
+      if (global.Deno) {
+        global.Deno.stderr.writeSync(buf);
+      } else if (global.process) {
+        global.process.stderr.writeSync(buf);
+      } else {
+        // ignore
+      }
+    } catch {
+      // ignore
+    }
+  }
+
   let instance: WebAssembly.Instance;
   let hostFormatter: ((request: FormatRequest) => string) | undefined = undefined;
   let formattedText = "";
@@ -43,10 +59,9 @@ export function createHost(): Host {
 
               const buf = new Uint8Array(wasmMemoryBuffer, iovecBufPtr, iovecBufLen);
 
-              if (fd === 1) {
-                Deno.stdout.writeSync(buf);
-              } else if (fd === 2) {
-                Deno.stderr.writeSync(buf);
+              if (fd === 1 || fd === 2) {
+                // just write both stdout and stderr to stderr
+                writeStderr(buf);
               } else {
                 return 1; // not supported fd
               }