chore(_tools): add npm build script

_tools/build_npm.ts

@@ -0,0 +1,23 @@
+import { build, emptyDir } from "https://deno.land/x/dnt@0.30.0/mod.ts";
+import { join } from "https://deno.land/std@0.157.0/path/mod.ts";
+import { makeOptions } from "./meta.ts";
+
+async function buildPkg(version: string): Promise<void> {
+  await emptyDir("./npm");
+  const pkg = makeOptions(version);
+  await Deno.copyFile("LICENSE", join(pkg.outDir, "LICENSE"));
+  Deno.copyFile(
+    join(".", "README.md"),
+    join(pkg.outDir, "README.md"),
+  );
+  await build(pkg);
+}
+
+if (import.meta.main) {
+  const version = Deno.args[0];
+  if (!version) {
+    console.error("argument is required");
+    Deno.exit(1);
+  }
+  await buildPkg(version);
+}

_tools/meta.ts

@@ -0,0 +1,38 @@
+import { BuildOptions } from "https://deno.land/x/dnt@0.30.0/mod.ts";
+
+export const makeOptions = (version: string): BuildOptions => ({
+  test: false,
+  shims: {},
+  typeCheck: true,
+  entryPoints: ["./mod.ts"],
+  outDir: "./npm",
+  package: {
+    name: "resultjs",
+    version,
+    description: "The standard API for result in JavaScript",
+    keywords: [
+      "result",
+      "ok",
+      "error",
+      "container",
+      "handle",
+      "throw",
+      "throws",
+      "handling",
+      "match",
+      "unsafe",
+    ],
+    license: "MIT",
+    homepage: "https://github.com/TomokiMiyauci/result-js",
+    repository: {
+      type: "git",
+      url: "git+https://github.com/TomokiMiyauci/result-js.git",
+    },
+    bugs: {
+      url: "https://github.com/TomokiMiyauci/result-js/issues",
+    },
+    sideEffects: false,
+    type: "module",
+  },
+  packageManager: "pnpm",
+});

_tools/publish_npm.ts

@@ -0,0 +1,26 @@
+import { prerelease, valid } from "https://deno.land/x/semver@v1.4.0/mod.ts";
+import { makeOptions } from "./meta.ts";
+
+if (import.meta.main) {
+  const version = Deno.args[0];
+  if (!version) {
+    console.error("arg of version is required");
+    Deno.exit(1);
+  }
+  if (!valid(version)) {
+    console.error("The argument of version is invalid");
+    Deno.exit(1);
+  }
+
+  const isPrerelease = prerelease(version);
+  const tag = isPrerelease?.[0] ?? "latest";
+
+  const pkg = makeOptions(version);
+  const result = await Deno.run({
+    cmd: ["npm", "publish", pkg.outDir, "--tag", String(tag)],
+    stdout: "piped",
+  })
+    .output();
+
+  console.log(new TextDecoder().decode(result));
+}