deployCommands.js

import fs from "fs";
import { config } from "dotenv";
import { REST } from "@discordjs/rest";
import { Routes } from "discord-api-types/v9";

config();

const gatherCommands = async () => {
  const commands = [];
  const commandFiles = fs
    .readdirSync("./commands")
    .filter((file) => file.endsWith(".js"));
  for (const file of commandFiles) {
    const command = await import(`./commands/${file}`);
    commands.push(command.default.builder.toJSON());
  }
  return commands;
};

(async () => {
  const commands = await gatherCommands();
  const rest = new REST({ version: "9" }).setToken(process.env.TOKEN);
  try {
    await rest.put(
      Routes.applicationGuildCommands(
        process.env.CLIENT_ID,
        process.env.GUILD_ID,
      ),
      { body: commands },
    );

    console.log("Successfully registered application commands.");
  } catch (error) {
    console.error(error);
  }
})();