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Installing a Ruby on Rails Development Environment in OS X
11:04In this video, you'll learn how to install a Ruby on Rails Development Environment in OS X.
Hi, I'm Jason, the Ruby teacher here at
Tree House.
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In this workshop,
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we're going to be setting up a Ruby on
Rails development environment in OS X.
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Now in order to do that, we're going to
need to install
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the Ruby programming languages, as well as
a few other dependencies.
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OS X already comes with a version of Ruby
installed.
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However, it's usually a little bit out of
date.
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So instead, what we're gonna do is install
Ruby via Homebrew,
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using Ruby Build and rbenv.
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Next we'll set up some databases,
configure GIT, install a text editor, and
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finally, generate a quick Ruby on Rails
application,
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to make sure everything is working.
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So let's go ahead and get started.
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So they first thing that we need to do,
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in order to install a Rails Development
Environment, is install Xcode.
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So make sure that that is installed from
the App Store.
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Right here, I'm using a fresh install of
OS X Yosemite, and
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all that I've done is install Xcode from
the App Store.
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Not gonna make you watch all that,
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because it takes a very long time to
download and install.
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So once Xcode is installed, what we need
to do is launch a terminal, and
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this is where most of our work is going to
be done, the rest of this.
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So, in order to get to terminal, over on
the bottom here,
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in Finder, head on over to the
Applications folder.
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And then scroll all the way down, and go
into Utilities and
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double-click on Terminal.
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Then I'm gonna close the App Store right
now, and also Finder.
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So I'm going to make this a little bit
bigger so that we can see it.
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Okay.
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So here's our Terminal window, and now we
can start typing in our commands.
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So the first thing that we need to do is
install the command line tools for Xcode.
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And that is going to let us build and
compile Ruby.
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So we do that by typing xcode=select then
a space and
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two dashes and the word install.
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And now just click Install, and then read
this fully and agree.
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Then Xcode will go through, and find and
download the command line tools.
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Feel free to go get a hot or cold beverage
while this happens.
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Okay so once that finishes, click on Done.
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And now there is one more command that we
have to type in which is sudo
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xcodebuild, and then a space, and license.
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And this will agree to the terms and
conditions of the Xcode license.
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Please make sure that you read them fully
before agreeing to it.
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And then go ahead and type in your
password.
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Hit Enter.
And then you'll have to read all of this.
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I read very quickly, so this is, this is
going, going very well for me.
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Now then just type agree, and boom,
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you have now installed and agreed to
Xcode's terms and conditions.
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So I'm gonna clear my screen here.
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And now we're gonna install something
called Homebrew,
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which is described as the missing package
manager for OS X.
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Homebrew will let us install different
command line software very easily,
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and we're going to use that to install
Ruby.
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So double-click this line and copy it,
then head back over to your Terminal.
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And this part I'm just.make it full screen
here so
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we can see it a little bit better, and I'm
gonna paste that.
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And this tells me what it's going to
install.
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Now Homebrew will install and do its
thing.
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Okay, it says the installation is
successful, so
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I'm gonna clear my screen again.
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Now let's just make sure Homebrew is up to
date, we type in brew update.
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Okay, that's up to date.
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Next type in, brew doctor, and that will
just check and
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make sure everything installed okay.
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All right, our system is ready to brew.
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So now we can install Ruby.
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We're going to install a project called
rbenv,
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which will manage our different Rubies for
us.
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And the other thing we're going to install
is a project called ruby-build.
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And this will download and install.
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Okay, now we're almost done here,
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rbenv needs us to add something to a
certain file,
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that launches when our Terminal launches,
so what we need to do is,
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take this line right here, and copy it.
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And then type the word echo, a single
quote,
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paste, another single quote, a space, a
greater than sign,
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another space, a tilde, a slash, and the
word, .profile.
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And .profile is a file that gets executed
by our Terminal
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every time we open a Terminal.
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And what this does is initializes rbenv.
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There's one more thing that we want to do,
which is type echo
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gem: --no-document,
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to a .gemrc file, also in our home
directory.
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So once we do that, we've set up rbenv's
environment,
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and we can either reload, or just type
exit.
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That'll be a little bit easier for us.
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And now we can just load a new Terminal.
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So I've launched a new Terminal.
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I'm gonna make this full screen again
here.
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And now if I type in rbenv -v it shows
I've got
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Version 0.4.0 of rbenv installed.
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Now I can go ahead and install a Ruby.
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So, let's go ahead and install Ruby
version 2.2.1.
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[BLANK_AUDIO]
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This will download, compile, and install
Ruby 2.2.1 for us.
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This may take a few minutes, so
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feel free to go do something else while
this installs and compiles.
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Now once the Ruby version finishes
downloading, installing, and
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compiling, we need to tell rbenv to use
it.
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And the way we do that is by saying, rbenv
global 2.2.1,
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which is the version we just installed,
and
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then type rbenv rehash, and
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rbenv rehash is going to just set that as
the global version of Ruby.
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Now if we type ruby -v, we see we've got
Ruby version 2.2.1 installed.
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Okay, now before we install Rails, we're
going to install a few other things.
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And these are just, kind of, good command
line programs to have,
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we're going to install Wget, Curl, and
imageMagick.
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These aren't strictly necessary for a
Rails installation, but
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they are great to have.
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And so Homebrew will download and install
these for
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us, and boom, those are all installed.
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And then finally, we can go through, and
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install the couple other things that we
need for a Rails installation.
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We need to install a Ruby gem called
Bundler, and
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we also need to install Rails.
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Okay, so once Bundler and the Rails gems
finish installing,
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we have to type in one more thing which
is, rbenv rehash.
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And that will tell rbenv to use the
binaries of Bundler and
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Rails, that we just installed.
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So now I'm going to kick this back out off
full screen here, and
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what we're going to do is grab a text
editor called, Sublime Text.
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And this is just, a preference, you don't
need to install
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Sublime Text if you already have a text
editor that you work with, but
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text editors are really good for editing
codes, specifically Rails code.
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Now double-click on Sublime Text to open
it.
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And then you can just grab that, and put
that in your Applications folder.
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And then, if we go over to the
Applications folder,
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we should have Sublime Text installed.
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And just click Open.
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OK.
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Sublime Text is now installed.
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I'm going to close it, and go back to my
Terminal.
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And here's a neat little command that we
can use.
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And you can copy and paste this from the
notes right below the video.
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But what this does right here is, creates
a symbolic link
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called sublime, which will let us open
folders and
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files inside of Sublime Text, right from
the command line.
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So once that's installed, now we can
finally create a Rails application.
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So I'm going to go into my Documents
folder, and type,
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rails new testapp, and that will generate
a new Rails application.
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So once that's done, I'm gonna clear my
screen again here, type cd testapp/, and
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then type, bin/rake db:create: all, that
will create all of the databases for us.
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And type, bin/rails server, and with any
luck, we should see this message
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saying that a new Rails application is
started in the development mode.
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And now we can copy that, and go to our
web browser and paste it,
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and we should see,welcome aboard, we are
riding Ruby on Rails.
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Great work, we now have installed and set
up a Rails development environment.
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