Before diving into setting up Supabase with RedwoodJS, make sure you've got Node.js and yarn installed on your computer. Also, don't forget to have a Supabase account ready.

Open up your terminal and run the command yarn create redwood-app followed by the name you want for your project. This will create a new RedwoodJS app for you.

yarn create redwood-app your-redwood-app

Now, navigate into your new RedwoodJS app directory.

cd your-redwood-app

Next, you'll need to install @supabase/supabase-js using yarn. This is the client library that lets you interact with Supabase.

yarn add @supabase/supabase-js

Head over to your src/lib directory and create a new file called supabase.js. This file will set up the Supabase client. Import the 'createClient' function from '@supabase/supabase-js' and initialize the client with your Supabase URL and public anonymous key.

import { createClient } from '@supabase/supabase-js'

export const supabase = createClient(
    process.env.SUPABASE_URL,
    process.env.SUPABASE_ANON_KEY
)

In the root of your project, create a .env file and add your Supabase URL and public anonymous key there.

SUPABASE_URL=your_supabase_url
SUPABASE_ANON_KEY=your_supabase_anonymous_key

Now you can start using Supabase in your RedwoodJS app. In your services or components, import the Supabase client from the supabase.js file in the src/lib directory. You can then use it to interact with your Supabase database.

import { supabase } from 'src/lib/supabase'

export const someFunction = async () => {
  const { data, error } = await supabase
    .from('yourTable')
    .select('columnName')
}

And there you have it! This is how you can set up and use Supabase within a RedwoodJS project. With these steps, you can now take advantage of Supabase's features like authentication, storage, functions, and its Postgres database in your RedwoodJS app.