Git 101

Prelude

What does it mean to work
without Version Control?

Your Daily Tasks

Create Things

Save Things

Edit Things

Save the Things Again

No VCS means:

No control over our changes. They are permanent.

We cannot revert to a previous state.

There is no descriptive history of the changes.

It is almost impossible to work collaboratively.

Version Control System (VCS)

A system that records changes to a file or set of files
over time so that you can recall specific versions later.

A system that enables collaboration:
A Team of people working on one Project, on the same files.

It allows you to:

• • Revert selected files back to a previous state
  
• • Revert the entire project back to a previous state
• • Compare changes over time
• • See who last modified something that might be causing a problem

Using a VCS also generally means that
if you screw things up or lose files, you can easily recover.

Version History

header: #ff69b4
								

footer: #185d2c
								

header: #457aa5, footer: #457aa5
								

header: #a57d45
								

header: #457aa5, footer: #ad2222
								

Your Daily Tasks

Create Things

Save Things

Edit Things

Save the Things Again

Your Daily Tasks

Create Things

Save Things

Edit Things

Save the Things Again

^

Version Control Systems keep track of every file change,
and create a Version History (Database)
from these file changes (Versions).

What is Git?

Git is a widely used and very popular VCS.

It is a tool that we install on our computers and tracks
file changes and keeps a history of them (Commits)

It allows multiple users to work
on a Project at the same time.

No Waiting: Continue working while other people
are working on the same Project at the same time.

It supports a powerful feature called: Feature Branches.

Git is a Distributed VCS.
The Database of changes (Version History) is stored
on a central Server and shared among all users.

The Distributed nature of Git enables us to keep track of
each user's changes and contributions over time.

A Real Life Example of a Git Workflow in Production

How does Git work?

Step 1

In order for Git to start tracking our Project's files
we first have to initialize our Project's folder

Go to your Project Directory:
> cd myProject

Initialize with Git:
> git init

Git has just created a .git folder inside your Project's folder.
All tracking data and information will be stored inside this folder.

That's it! Git can now start tracking all changes.

The Three Stages of Git

-- git add -->

-- git commit -->

GitHub

Local / Remote Repo Synchronization

Enough Theory: Let's Practice!

Prerequisites:

1) Install Git* and test that everything is working by running:
git --version
Download for Windows
Download for Linux
Download for Mac

2) Create a GitHub Account

*Windows: Check Git Bash

3) Configure Git

git config --global user.name "Joe"

git config --global user.email "your@email.com"

Git Hands-On

What we'll do...

[ Demo Session ]