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# Go (URL Shortener) [![build status](https://git.gmu.edu/srct/go/badges/master/build.svg)](https://git.gmu.edu/srct/go/commits/master) [![coverage report](https://git.gmu.edu/srct/go/badges/master/coverage.svg)](https://git.gmu.edu/srct/go/commits/master)


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A project of [GMU SRCT](http://srct.gmu.edu).
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Go is a drop-in URL shortening service. It aims to provide an easily
branded service for institutions that wish to widely disseminate
information without unnecessarily outsourcing branding.

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I encourage you to join the #go channel in SRCT's [Slack Group](http://srct.slack.com) if you have any questions on setup or would like to contribute.
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## Package Installation
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<legend></legend>
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### Prerequisities
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First, install python and git on your system.
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* Python is the programming language used for Django, the web framework used by Go.
* Git is the version control system used for SRCT projects.

Open a terminal and run the following command:

`$ sudo apt-get update`

This retrieves links to the most up-to-date and secure versions of your packages.

Next, with:

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`$ sudo apt-get install python python-dev python-pip git`
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you install python and git.

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**macOS (Formerly OS X)**
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This tutorial uses the third party Homebrew package manager for macOS, which allows you to install packages from your terminal just as easily as you could on a Linux based system. You could use another package manager (or not use one at all), but Homebrew is highly reccomended.
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To get homebrew, run the following command in a terminal: `/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)`
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**Note**: You do NOT need to use `sudo` when running any Homebrew commands, and it likely won't work if you do.
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Next, to make sure Homebrew is up to date, run `brew update`
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Finally we can install python and git with `brew install python git`
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### Cloning the Go Codebase
Now, we're going to clone down a copy of the Go codebase from [git.gmu.edu](http://git.gmu.edu/srct/go), the SRCT code respository.
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Configure your ssh keys by following the directions at [git.gmu.edu/help/ssh/README](http://git.gmu.edu/help/ssh/README).
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Now, on your computer, navigate to the directory in which you want to download the project (perhaps one called development/ or something similar), and run

`$ git clone git@git.gmu.edu:srct/go.git`

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### If Using Docker
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First, install Docker on your system.
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* For macOS go here: https://docs.docker.com/docker-for-mac/
* For windows go here: https://docs.docker.com/docker-for-windows/
* For you specific linux disro go here: https://docs.docker.com/engine/installation/
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Additionally if you are not on Mac or Windows you will need to install docker-compose: https://docs.docker.com/compose/install/

Next go to the directory with the docker-compose file in it and run:
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`$ docker-compose up`

You should see that the server is running by going to http://localhost:8000 in your browser.
Any changes you make to your local file system will be mirrored in the server.
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### If Using Vagrant
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Finally, install these packages from the standard repositories:
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 - VirtualBox

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    On Ubuntu:
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    `$ sudo apt-get install virtualbox`
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    You should be installing the latest VirtualBox version which as of time of writing is `5.0.24_Ubuntur108355`. You can verify the version number by running `vboxmanage --version`.
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 - Vagrant

    `$ sudo apt-get install vagrant`
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    You should be installing the latest vagrant version which as of time of writing is `Vagrant 1.8.1`. You can verify the version number by running `vagrant -v`.
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 - Ansible

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    `$ sudo pip install ansible`

    You should be installing the latest ansible version which as of time of writing is `ansible 2.1.1.0`. You can verify the version number by running `ansible --version`.
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  **macOS**
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  First, get VirtualBox from [VirtualBox.org](https://www.virtualbox.org/wiki/Downloads)
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  Then install Vagrant and Ansible with Homebrew with `brew install Caskroom/cask/vagrant Ansible`
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## Developing with Vagrant
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<legend></legend>
Vagrant allows for the virtualization of your development enviornment and automates the setup process for Go.

### Vagrant Setup
Navigate to go/ and run:

`$ vagrant up`

This will setup a vm to run Go on your computer and will setup a database, install packages, etc. The first time you run `vagrant up` it may take a few minutes to setup, specifically when installing Go packages. Don't worry as progressive times it will speed up.
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And that's it! Navigate to [localhost:8000](http://127.0.0.1:8000) in your web browser to view the website.
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### Additional Notes & Troubleshooting
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The authentication service used for Go is CAS. In local development however we utilize a test server. You can log in using your CAS username for both the username and password fields.

 The default superuser is _dhaynes3_ though this can be changed in _vagrantfile_ if you wish. You can run `$ vagrant provision` to apply this change. Be sure not to include that change in your commits.

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*Note:* For a currently undetermined reason at some points if you try to navigate to [localhost](http://127.0.0.1:8000) and you see an error like: "Conenction has been reset" then:
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1. `vagrant ssh`
2. `sudo /etc/init.d/networking restart` and then `exit`
3. `vagrant provision` (may need to do twice)
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This is the only temporary fix that we know exists.

If you make any changes to _models.py_ you will need to re-provision the vm's database:
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`$ vagrant provision`

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Please note that this will refresh the database (as in delete everything in it).
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### Cron

In order to expire links, you need to set up a cron job to run the manage.py
expirelinks command regularly. A sample cron script is available in the
repository and is named go-cleanlinks.cron. Drop this in cron.hourly and
change the paths so that they point to the virtualenv activate script and
manage.py.
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### Note
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Link by Viktor Vorobyev from the Noun Project.