deploy-commands.js

const { REST, Routes } = require('discord.js')
const fs = require('node:fs');
const path = require('node:path');

require("dotenv").config() 

const foldersPath = path.join(__dirname, 'commands')
const commandFolders = fs.readdirSync(foldersPath)

const commands = []

// For every folder in our 'commands' folder, go through each folder and apply each .js file

// Get every folder in the 'commands' folder
for (const folder of commandFolders) {
  // Get every .js file for each subdirectory under the 'commands' folder
  const commandsPath = path.join(foldersPath, folder)
  const commandFiles = fs.readdirSync(commandsPath).filter(file => file.endsWith('.js'));

  for (const file of commandFiles) {
    const filePath = path.join(commandsPath, file)
    const command = require(filePath)
    // Set a new item in the Collection with the key as the command name and the value as the exported module
    if ('data' in command && 'execute' in command) {
      commands.push(command.data.toJSON())
    } else {
      console.log(`[WARNING] The command at ${filePath} is missing a required "data" or "execute" property`)
    }
  }
}

// Construct and prepare an instance of the REST module
const rest = new REST().setToken(process.env.DISCORD_TOKEN);

// and deploy your commands!

(async () => {
  try {
    console.log(`Started refreshing ${commands.length} application (/) commands.`)
    
    const clientId = process.env.CLIENT_ID
    const guildId = process.env.GUILD_ID
    // The put method is used to fully refresh all commands in the guild with the current set
    const data = await rest.put(
      Routes.applicationGuildCommands(clientId, guildId),
      { body: commands }
    )

    console.log(`Successfully reloaded ${data.length} application (/) commands!`)
  } catch (err) {
    // Logs any errors in case anything went wrong.
    console.error(err)
  }
})();