Getting Eta to work with Deno Deploy

Disclaimer: This blog post should not be interpreted as professional advice. I am not responsible for any actions taken based on this content and disclaim any liability for any resulting losses or damages.

Deno Deploy is a great service for hosting your Deno projects on the cloud for free. Unfortunately it does not work with the eta templating language.

The reason for this is that eta uses the Deno.exists function, which is depreciated, and removed on the Deno Deploy service.

After looking for a solution to this myself, but not finding any, I decided to try to come up with my own fix, which has been posted on the eta github page.

https://github.com/eta-dev/eta/issues/172

Here is a temporary fix that allows you to at least use templates on Deno Deploy :)

Eta.config.includeFile = function(path, data) {
  return Eta.templates.get(path)(data, Eta.config);
};

I would then write something like this:

Eta.templates.define("main", Eta.compile(
  await Deno.readTextFile(`${Deno.cwd()}/views/main.eta`)));

const template = await Eta.render(await Deno.readTextFile(`${Deno.cwd()}/views/home.eta`), {
    title: "My webpage"
  });

And this in the templates:

// home.eta

<% layout("main") %>

<h1>Welcome to my home page</h1>

// main.eta

<!DOCTYPE html>
<html lang="en">
<head>
    <title><%= it.title %></title>
</head>
<body>
    <%~ it.body %>
</body>
</html>