Using environment variable more

For example, let's say you want to embed a snippet of the tag manager into the production environment plus other environments for testing.

In the past I have implemented the following.

<% if Rails.env.production?
  <%# snippet for production %>
<% else %>
  <%# snippet for other environments %>
<% end %>

Hmmm. There was a problem with this.

• 👎 Can't verify if statement until deployed to production.
• 👎 Even if we can verify it with RAILS_ENV=production, we don't know what impact it will have elsewhere.

What about using environment variables instead?

<%= sanitize ENV[:GTM_HEAD_SNIPPET] %>

Good!