Writing your first Encore app, part 1

In this tutorial we'll create a simple Encore app together. The app will be a simple todo list.

If you don't have Encore installed, go ahead and set it up now. If you're not sure, run the following command in your terminal (indicated by the $ sign):

$ encore version

If Encore is installed you will see the version of the installation. If not, you will see something like encore: command not found.

Creating your app

We'll start by creating an app. An app in Encore represents your whole application; it's suitable for everything from a small todo list app to a large project run by many different teams across the globe.

First change directory to where you would like to store your source code using cd in your command line. Then, create your app with the following command:

$ encore create myapp

This will create the myapp directory inside your current directory. If you cd into this directory, you should see the following files:

  • myapp/ is the containing directory for your whole application. The name is not important and you can change it as you please.

  • encore.app contains the configuration Encore needs to connect your code to the right application on the Encore servers.

  • go.mod is the Go module definition for the app. If you're not sure what this is, you might want to read more about Go modules.

  • hello/ is a Go package that defines a service. Services are just like regular Go packages but they also contain Encore API endpoints and may have resources like SQL databases attached to them. More about this later.

  • hello/hello.go is a Go file with a simple Encore API endpoint. We'll dig into it in greater detail soon.

Running your app

To make sure everything is set up correctly, cd into the myapp directory if you haven't already and in your command line run the command:

$ encore run

You should see output that looks like this:

Running on http://localhost:4060
9:30AM INF registered endpoint endpoint=World service=hello

Now, open a new command line window and use curl to make an HTTP request towards your server:

$ curl http://localhost:4060/hello.World

You should see as a response:

{"Message":"Hello, world!"}

In that case, you're all set up and ready to go! Press Ctrl-C to stop the server. If everything looks good, you are ready to move on to part 2 of the tutorial.

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