Today Icelab Learned
 about rake

Rake tasks with splat arguments

Splat arguments can be helpful, and it turns out we don’t need to forsake them when we’re building Rake tasks, either.

Let’s say we want to build an elasticsearch:reindex task that allows an optional list of entity types to reindex:

namespace :elasticsearch do
  task :reindex do |_t, args|

Rake gives us a TaskArguments#extras method, which returns the values not associated with any of the task’s named arguments.

So now we can call our rake task like so:

rake elasticsearch:reindex[products, posts]

And args.extras gives us this:

["products", "posts"]