Add Run A Rake Task Programmatically as a Rails TIL

README.md

@@ -10,7 +10,7 @@ pairing with smart people at Hashrocket.
 
 For a steady stream of TILs, [sign up for my newsletter](https://crafty-builder-6996.ck.page/e169c61186).
 
-_1207 TILs and counting..._
+_1208 TILs and counting..._
 
 ---
 
@@ -782,6 +782,7 @@ _1207 TILs and counting..._
 - [Retrieve An Object If It Exists](rails/retrieve-an-object-if-it-exists.md)
 - [Rollback A Specific Migration Out Of Order](rails/rollback-a-specific-migration-out-of-order.md)
 - [Rounding Numbers With Precision](rails/rounding-numbers-with-precision.md)
+- [Run A Rake Task Programmatically](rails/run-a-rake-task-programmatically.md)
 - [Run Some Code Whenever Rails Console Starts](rails/run-some-code-whenever-rails-console-starts.md)
 - [Schedule Sidekiq Jobs Out Into The Future](rails/schedule-sidekiq-jobs-out-into-the-future.md)
 - [Secure Passwords With Rails And Bcrypt](rails/secure-passwords-with-rails-and-bcrypt.md)

rails/run-a-rake-task-programmatically.md

@@ -0,0 +1,35 @@
+# Run A Rake Task Programmatically
+
+Typically the way to run a rake task is with the `rake` command from the
+command line.
+
+```bash
+$ rake example:env
+```
+
+What if you have a rake task that you want to invoke as part of a Ruby script
+or from somewhere in your Rails codebase?
+
+Your tasks can be called programmatically as well.
+
+Consider these two rake tasks:
+
+```ruby
+namespace :example do
+  task :env do
+    puts "Current Environment: #{Rails.env.upcase}"
+  end
+
+  task :message, [:msg] do |task, args|
+    puts "Message: #{args[:msg]}"
+  end
+end
+```
+
+These can be called from somewhere else by referencing and invoking them like
+so.
+
+```ruby
+Rake::Task["example:env"].invoke
+Rake::Task["example:message"].invoke("Nice rake task!")
+```