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Getting Started

All that you need to get started with the examples is Git and Ruby (1.8.7 or later) with Bundler for dependency management.

Below you find the basic instructions for an easy installation on Mac, Linux and Windows.

on Mac


The easiest way is to use Git OSX installer

Installing Git with Homebrew

Git can be also be installed using Homebrew package manager.

To install Homebrew open a terminal and paste the following command:

/usr/bin/ruby -e "$(curl -fsSL"

Once you have installed Homebrew you can install Git with the following command:

brew install git

Git GUIs


Ruby 1.8.7 is preinstalled on Mac OS X 10.6 and later (Snow Leopard and Lion). You just need to:

  1. Update RubyGems: sudo gem update -system
  2. Install bundler: sudo gem install bundler


If you want to install the latest version of Ruby or if you want to manage multiple versions, the best option is to install RVM (Ruby Version Manager).

Open the terminal and run the following commands:

bash < <(curl -s )
rvm install 1.9.2
rvm use 1.9.2 --default

This will install the latest version 1.9.2 and making it as the default Ruby interpreter

For more information you can check this page.

on Linux


On Debian Linux (like Ubuntu) you can install Git using the apt package manager. Open a terminal and paste the following code:

sudo apt-get install git-core


On Debian Linux (like Ubuntu) you can use the apt package manager to install Ruby. You need to install Ruby with development tools (-dev):

sudo apt-get install ruby1.9.1-dev

Note that this will install the latest version 1.9.2 and not 1.9.1

on Windows

###Git Installing Git is pretty easy. Just download and install the package called msysGit.


  1. Install Ruby 1.8.7 using RubyInstaller. If you are planning to use Ruby on Rails, you should consider the RailsInstaller
  2. Install Ruby Development Kit needed for some gems
  3. Install bundler: gem install bundler

Tip: To make sure the correct Ruby version is used in command line, open command prompt using the “Start command prompt with Ruby” from the Ruby 1.8.7 subfolder in Start-menu

Using the examples

All the examples are contained in a single Git repository that is hosted on GitHub. Here you can find the instructions how to clone the repository and launch the examples.

Configuring GitHub

The first step is to configure your Git with your GitHub account. If you haven't done it yet, create an account at GitHub

Once you have created the account you can follow these guides for configuring your Git: Mac, Linux and Windows

Cloning the repository

You can download the examples by simply cloning this GitHub repository. Open a terminal and run the following code:

 git clone

This will create a directory called MobileWebAppsExamples which contains all the examples in separate subdirectories. If you want you can rename it to something else.

If in the future you need to fetch the changes from the server, you can run the following commands in a terminal:

cd MobileWebAppsExamples
git pull

Updating the gems

In the directory MobileWebAppsExamples there is a file called Gemfile that contains all the additional modules (called gems) that are required to run the examples.

The first thing is to install Bundler that is tool for managing application's dependencies for Ruby. You can install it by running the following commands in a terminal:

gem install bundler

Once you have install Bundler you can install the additional gems by running the following commands:

cd MobileWebAppsExamples
bundle install

Launching the examples

Each subdirectory contains a seprate example. Most of examples are based on Sinatra and you can launch the server with the following command:

ruby -rubygems server.rb

Deploying on Heroku

Heroku provides a free and convenient way for hosting applications in the cloud. After you sign up for free on their website you can follow these instructions for getting started with Heroku on different platforms. Once you have logged in with you account, you can start to deploy applications by pushing Git repositories. Below there is an example how to deploy the sinatraHelloWorld example.

Copy the files to deploy

First we copy all the files of the application that we need to deploy into a separate directory. We start in the parent directory where the examples are located and enter the following commands:

mkdir deploy
cd deploy
cp ../MobileWebAppsExamples/sinatraHelloWorld/* .

Configure the application

Heroku requires two files for configuring and starting the application: Gemfile and We can copy the Gemfile from the examples directory:

cp ../MobileWebAppsExamples/Gemfile .

We can create the file in this way:

echo "require './server'" >> 
echo "run Sinatra::Application" >>

Create the Git repository

We create the Git repository and commit all the files

git init
git add .
git commit -am "First commit"

Create a new Heroku instance

We create a new Heroku instance with the following command:

heroku create

The result is:

Creating quiet-day-9893... done, stack is bamboo-mri-1.9.2 |
Git remote heroku added

Heroku has create a new server instance at:

Heroku has also created a new Git repository ( on their servers and automatically configured is as a remote for our local Git repository. We can check that with following command:

git remote -v

The result below shows that we have a new remote called heroku:

heroku (fetch)
heroku (push)

Deploy the application

We can deploy the application by simply pushing the master to heroku:

git push heroku master

The result is the following:

Counting objects: 5, done.
Delta compression using up to 4 threads.
Compressing objects: 100% (4/4), done.
Writing objects: 100% (5/5), 540 bytes, done.
Total 5 (delta 0), reused 0 (delta 0)

-----> Heroku receiving push
-----> Ruby/Sinatra app detected
-----> Gemfile detected, running Bundler version 1.0.7
       Unresolved dependencies detected; Installing...
       Using --without development:test

 !     Gemfile.lock will soon be required
 !     Check Gemfile.lock into git with `git add Gemfile.lock`
 !     See

       Fetching source index for
       Installing addressable (2.2.7) 
       Installing coffee-script-source (1.2.0) 
       Installing multi_json (1.1.0) 
       Installing execjs (1.3.0) 
       Installing coffee-script (2.2.0) 
       Installing daemons (1.1.8) 
       Installing eventmachine (0.12.10) with native extensions 
       Installing em-websocket (0.3.6) 
       Installing ffi (1.0.11) with native extensions 
       Installing thor (0.14.6) 
       Installing guard (1.0.1) 
       Installing guard-coffeescript (0.5.5) 
       Installing haml (3.1.4) 
       Installing guard-haml (0.3.2) 
       Installing sass (3.1.15) 
       Installing guard-sass (0.5.4) 
       Installing manifesto (0.7.0) 
       Installing ruby-hmac (0.4.0) 
       Installing signature (0.1.2) 
       Installing pusher (0.9.2) 
       Installing rack (1.4.1) 
       Installing rack-protection (1.2.0) 
       Installing tilt (1.3.3) 
       Installing sinatra (1.3.2) 
       Installing thin (1.3.1) with native extensions 
       Using bundler (1.0.7) 
       Your bundle is complete! It was installed into ./.bundle/gems/
-----> Compiled slug size is 3.1MB
-----> Launching... done, v4 deployed to Heroku

 * [new branch]      master -> master

Now the application is deployed at:


Examples for the Mobile Web Apps course at Aalto



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