feat: generate npm pacakge

.gitignore

@@ -1,3 +1,4 @@
-/.direnv
+/.direnv/
+/npm/
 /src/main.wasm
 /src/wasm_exec.js

build.ts

@@ -1,3 +1,6 @@
+import { build, emptyDir } from "@deno/dnt";
+import denoJson from "./deno.json" with { type: "json" };
+
 const command = new Deno.Command("go", {
   args: ["build", "-o", "../main.wasm", "main.go"],
   cwd: "src/go",
@@ -23,3 +26,39 @@ if (!wasmExecJs) {
 
 await Deno.copyFile(wasmExecJs, "src/wasm_exec.js");
 await Deno.chmod("src/wasm_exec.js", 0o644);
+
+// Build npm package
+await emptyDir("npm");
+
+await build({
+  entryPoints: ["./mod.ts"],
+  outDir: "npm",
+  scriptModule: false,
+  shims: {
+    deno: "dev",
+  },
+  compilerOptions: {
+    lib: ["DOM", "ESNext"],
+    target: "Latest",
+  },
+  package: {
+    name: "publiccode-parser",
+    version: denoJson.version,
+    description: denoJson.description,
+    license: "EUPL-1.2",
+    repository: {
+      type: "git",
+      url: "git+https://github.com/italia/publiccode-parser-js.git",
+    },
+    bugs: {
+      url: "https://github.com/italia/publiccode-parser-js/issues",
+    },
+    devDependencies: {
+      "@types/golang-wasm-exec": "^1.15.2",
+    },
+  },
+  postBuild() {
+    Deno.copyFileSync("LICENSE", "npm/LICENSE");
+    Deno.copyFileSync("src/main.wasm", "npm/esm/src/main.wasm");
+  },
+});

deno.json

@@ -7,14 +7,15 @@
     "types": ["@types/golang-wasm-exec"]
   },
   "imports": {
+    "@deno/dnt": "jsr:@deno/dnt@^0.42.3",
     "@std/assert": "jsr:@std/assert@^1.0.13",
     "@types/golang-wasm-exec": "npm:@types/golang-wasm-exec@^1.15.2"
   },
   "publish": {
     "exclude": ["!src/main.wasm", "!src/wasm_exec.js"]
   },
   "tasks": {
-    "build": "deno run --allow-env --allow-read --allow-run --allow-write build.ts"
+    "build": "deno run --allow-env --allow-net --allow-read --allow-run --allow-write build.ts"
   },
   "test": {
     "permissions": {