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+I'm currently working on a [node.js][node] module ([node-genx]) with a C++ component.
+Each time a change was made to the code its necessary to rebuild the
+module then run the tests. This was getting tiring so I decided to use
+[guard] to automate the process.
+
+[node]: http://nodejs.org/
+[node-genx]: https://github.com/wezm/node-genx
+[guard]: https://github.com/guard/guard
+
+guard is a ruby gem that provides a DSL for performing actions when
+a set of watched files change. There a bunch of "guards" available
+that provide out of the box support for things like [rspec], [jammit],
+[sass] and [CoffeeScript][coffee-script]. For simple custom cases
+like mine there is also [guard-shell], which will run a shell
+command when one of its watched files changes.
+
+[coffee-script]: http://jashkenas.github.com/coffee-script/
+[rspec]: http://rspec.info/
+[jammit]: http://documentcloud.github.com/jammit/
+[sass]: http://sass-lang.com/
+[guard-shell]: https://github.com/guard/guard-shell
+
+guard uses a Guardfile akin to a Makefile in you project directory to
+configure the guards. Mine looks like this:
+
+    guard 'shell' do
+      watch(%r".*\.(?:cc|h)") { |m| `node-waf build && jasbin` }
+      watch(%r"spec/.*_spec\..*") {|m| `jasbin --verbose` }
+    end
+
+This runs `node-waf build && jasbin` to rebuild the module and run the
+tests when any of the C++ source files or headers change. It just runs
+the the tests when any of the spec files change.
+
+Once your Guardfile is setup simply run `guard` in you project directory
+and it will start watching for changes.
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diff --git a/content/technical/2011/01/automatically-build-and-test-with-guard.yaml b/content/technical/2011/01/automatically-build-and-test-with-guard.yaml
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+--- 
+title: Automatically Build and Test With Guard
+extra: How to use guard to automatically build and test a node.js C++ module.
+kind: article
+section: technical
+created_at: 2011-01-25 22:31:00
+keywords: 
+- guard
+- node
+- ruby
+- js
+- testing