feat: Filemagedon

Signed-off-by: Avior <git@avior.me>

src/commands/index.ts

@@ -0,0 +1,78 @@
+import fs from "node:fs/promises"
+
+interface Context {
+	args: Array<string>
+	commands: Array<Command>
+	command: string
+}
+
+interface Response {
+	code: number
+}
+
+export interface Command {
+	run(input: Context): Promise<Response> | Response
+	name: string
+	description?: string
+}
+
+const builtinCommands: Array<Command> = [
+	{
+		name: "help",
+		run({ commands }) {
+			console.table(
+				commands.map((command) => ({
+					name: command.name,
+					description: command.description ?? "no description",
+				})),
+			);
+			return {
+				code: 0,
+			};
+		},
+	},
+];
+
+async function createContext(): Promise<Context> {
+	const ctx = {
+		args: process.argv.slice(3),
+		commands: await getCommands(),
+		command: process.argv[2] ?? "help",
+	};
+	return ctx
+}
+
+async function listfiles(folder: string): Promise<Array<string>> {
+	const files = await fs.readdir(folder)
+	const res: Array<string> = [];
+	for (const file of files) {
+		const path = `${folder}/${file}`
+		if ((await fs.stat(path)).isDirectory()) {
+			res.push(...(await listfiles(path)))
+		} else {
+			res.push(path)
+		}
+	}
+	return res
+}
+
+async function getCommands(): Promise<Array<Command>> {
+	const files = (await listfiles(__dirname))
+		.filter((it) => it !== `${__dirname}/index.ts`)
+		.map((it) => import(it).then((it) => it.default))
+	return builtinCommands.concat(await Promise.all(files))
+}
+
+;(async () => {
+	const context = await createContext()
+	for (const command of context.commands) {
+		if (command.name === context.command) {
+			const res = await command.run(context)
+			process.exit(res.code)
+		}
+	}
+
+	console.log(
+		`command "${context.command}" not found, please use "help" to get the list of commands`,
+	)
+})()