feat: populate package.json author from npm info (#343)

## PR Checklist

- [x] Addresses an existing open issue: fixes #154
- [x] That issue was marked as [`status: accepting
prs`](https://github.com/JoshuaKGoldberg/template-typescript-node-package/issues?q=is%3Aopen+is%3Aissue+label%3A%22status%3A+accepting+prs%22)
- [x] Steps in
[CONTRIBUTING.md](https://github.com/JoshuaKGoldberg/template-typescript-node-package/blob/main/.github/CONTRIBUTING.md)
were taken

## Overview

Uses `npm whoami` and
[`npm-user`](https://github.com/sindresorhus/npm-user) to try to
retrieve data on the currently logged in npm user.

Bolsters the end-to-end testing too!

Author: JoshuaKGoldberg

package.json

@@ -65,6 +65,7 @@
 		"markdownlint-cli": "^0.33.0",
 		"npm-package-json-lint": "^6.4.0",
 		"npm-package-json-lint-config-default": "^5.0.0",
+		"npm-user": "^5.0.1",
 		"octokit": "^2.0.11",
 		"pnpm-deduplicate": "^0.4.1",
 		"prettier": "^2.8.3",

pnpm-lock.yaml

@@ -11,11 +11,12 @@ const repository = "new-repository-test";
 
 const result =
 	await $`pnpm run setup --description ${description} --owner ${owner} --title ${title} --repository ${repository} --skip-api`;
-console.log({ result });
+console.log("Result from pnpm run setup:", result);
 
 const newPackageJson = JSON.parse(
 	(await fs.readFile("./package.json")).toString()
 );
+console.log("New package JSON:", newPackageJson);
 
 assert.equal(newPackageJson.description, description);
 assert.equal(newPackageJson.name, repository);
@@ -31,3 +32,10 @@ for (const search of [
 		`README.md:> 💙 This package is based on [@JoshuaKGoldberg](https://github.com/JoshuaKGoldberg)'s [template-typescript-node-package](https://github.com/JoshuaKGoldberg/template-typescript-node-package).`
 	);
 }
+
+try {
+	await $`pnpm lint:knip`;
+} catch (error) {
+	console.error("Error running lint:knip:", error);
+	process.exitCode = 1;
+}

script/setup-test-e2e.js

@@ -5,6 +5,7 @@ import { parseArgs } from "node:util";
 import { cancel, isCancel, text } from "@clack/prompts";
 import chalk from "chalk";
 import { promises as fs } from "fs";
+import npmUser from "npm-user";
 import { Octokit } from "octokit";
 import prettier from "prettier";
 import replace from "replace-in-file";
@@ -147,13 +148,45 @@ try {
 		)
 	);
 
+	async function getNpmAuthor() {
+		let username;
+
+		try {
+			username = await $`npm whoami`;
+		} catch {
+			console.log(
+				chalk.gray("Could not populate npm user. Failed to run npm whoami. ")
+			);
+			return owner;
+		}
+
+		let npmUserInfo;
+
+		try {
+			npmUserInfo = await npmUser(username.stdout.trim());
+		} catch {
+			console.log(
+				chalk.gray(
+					"Could not populate npm user. Failed to retrieve user info from npm. "
+				)
+			);
+			return owner;
+		}
+
+		const { name = owner, email } = npmUserInfo;
+		return email ? `${name} <${email}>` : name;
+	}
+
+	const npmAuthor = await getNpmAuthor();
+
 	for (const [from, to, files = ["./.github/**/*", "./*.*"]] of [
 		[new RegExp(existingPackage.description, "g"), description],
 		[/Template TypeScript Node Package/g, title],
 		[/JoshuaKGoldberg/g, owner],
 		[/template-typescript-node-package/g, repository],
 		[/"setup": ".*",/g, ``, "./package.json"],
 		[/"setup:test": ".*",/g, ``, "./package.json"],
+		[/"author": ".+"/g, `"author": "${npmAuthor}"`, "./package.json"],
 		[
 			new RegExp(`"version": "${existingPackage.version}"`, "g"),
 			`"version": "0.0.0"`,
@@ -328,7 +361,14 @@ try {
 	console.log(
 		chalk.gray`Removing devDependency packages only used for setup...`
 	);
-	await $`pnpm remove @clack/prompts all-contributors-cli chalk octokit replace-in-file -D`;
+
+	try {
+		await $`pnpm remove @clack/prompts all-contributors-cli chalk octokit npm-user replace-in-file title-case -D`;
+	} catch (error) {
+		console.log("Error uninstalling packages:", error);
+		caughtError = error;
+	}
+
 	console.log(chalk.gray`✔️ Done.`);
 }