From f3861a6dfb362046fa17642aa60efcc5b20189b3 Mon Sep 17 00:00:00 2001
From: jbranchaud <jbranchaud@gmail.com>
Date: Fri, 4 Sep 2015 14:33:53 -0500
Subject: [PATCH] Add Invoking Rake Tasks Multiple Times as a ruby til.

---
 README.md                                  |  1 +
 ruby/invoking-rake-tasks-multiple-times.md | 32 ++++++++++++++++++++++
 2 files changed, 33 insertions(+)
 create mode 100644 ruby/invoking-rake-tasks-multiple-times.md

diff --git a/README.md b/README.md
index 9f757c7..f102fc1 100644
--- a/README.md
+++ b/README.md
@@ -118,6 +118,7 @@ smart people at [Hashrocket](http://hashrocket.com/).
 - [Evaluating One-Off Commands](ruby/evaluating-one-off-commands.md)
 - [FactoryGirl Sequences](ruby/factory-girl-sequences.md)
 - [Finding The Source of Ruby Methods](ruby/finding-the-source-of-ruby-methods.md)
+- [Invoking Rake Tasks Multiple Times](ruby/invoking-rake-tasks-multiple-times.md)
 - [Last Raised Exception In The Call Stack](ruby/last-raised-exception-in-the-call-stack.md)
 - [Limit Split](ruby/limit-split.md)
 - [Listing Local Variables](ruby/listing-local-variables.md)
diff --git a/ruby/invoking-rake-tasks-multiple-times.md b/ruby/invoking-rake-tasks-multiple-times.md
new file mode 100644
index 0000000..0598209
--- /dev/null
+++ b/ruby/invoking-rake-tasks-multiple-times.md
@@ -0,0 +1,32 @@
+# Invoking Rake Tasks Multiple Times
+
+I have a rake task, `build`, that builds a single record for development
+purposes. I want a supplemental rake task, `build:all`, that builds a bunch
+of different records. To keep things dry, `build:all` should just invoke
+`build` a number of times.
+
+```ruby
+namespace :build do
+  task :all do
+    predefined_list.each do |data|
+      Rake::Task["build"].invoke(data)
+    end
+  end
+end
+```
+
+This doesn't work though. No matter how many items are in the list, the
+`build` task only seems to get run once. This is because by default tasks
+can only be invoked once in a given context. To get around this, the task
+needs to be reenabled after each invocation.
+
+```ruby
+namespace :build do
+  task :all do
+    predefined_list.each do |data|
+      Rake::Task["build"].invoke(data)
+      Rake::Task["build"].reenable
+    end
+  end
+end
+```