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Introduce Bundler and Gemfiles in a NOTE

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ptn committed Dec 6, 2012
1 parent cb389fc commit 83cb6fbd13f3c5ea3106b9a57964b1a6fb243682
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@@ -115,6 +115,8 @@ $ rails new blog
This will create a Rails application called Blog in a directory called blog and install the gem dependencies that are already mentioned in `Gemfile` using `bundle install`.
+NOTE: A Gemfile is a file that contains the list of all the gems that you require to run your application - the so called dependencies. With it, a program called Bundler can make sure that your machine has all of the requirements installed. This is the de facto way in Ruby to make sure that a machine is set up correctly to run a given program and Rails takes advantage of it to install some commonly-used gems. For more information, visit [Bundler's homepage](
TIP: You can see all of the command line options that the Rails
application builder accepts by running `rails new -h`.

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