Introduction to Git

An introduction to git and its basic concepts

Transcript

1. Introduction to GIT Nriagu Chidubem Software Engineer @Chatdesk @nriagudubem(Twitter)
2. Overview 1. Install GIT and create a github account 2. Version Control 3. What is Git ? 4. Git and how it works 5. More resources
3. Install git and create a github account • Linux(Debian) ◦ Command: sudo apt-get install git • Linux(Fedora) ◦ Command: sudo yum install git • Mac ◦ http://git-scm.com/download/mac • Windows ◦ http://git-scm.com/download/win Log on to https://github.com to create a github account
4. Version Control System • Keeps records of changes made to source code • Allows for collaborative development • Allows you to know who made a particular change and when • Allows you to revert changes and go back to a previous/original state Eg: svn, git , mercurial, e.t.c
5. Git and how it works - Git states
6. Git and how it works (key Concepts) • Repositories • Commit • Snapshots • Cloning • Branch • Push • Pull
7. Key Concepts (repositories) • A collection of files and their history • Can live on a local machine or a remote server • The act of copying a repository from a remote server is called cloning • The process of downloading commits that does not exists on your local machine from a remote server is called pulling • Adding local changes to a remote repository is called pushing
8. Key Concepts (snapshot) • The way all files looks like at a given time • You decide when to take a snapshot and of what files • A file/source code can be returned to a specific snapshot
9. Key Concepts (commit) git commit -m ‘name of the commit ’ This is the act of creating a snapshot Commits contains some of information • Information about how the files has changed from previously • Name of the commit • Username and email of person who made the commit • A hash code name (Generated by SHA-1 Algorithm)
10. Key Concepts (cloning) git clone repository url • The act of making a local copy of a remote repository • After cloning, the default branch is the master • After cloning, we have to set the remote url • Remote is the url to our repository
11. Key Concepts (branching/merging) git checkout -b branch-name, git merge branch-name • Branches are created to work on a new feature or play around with the source code without affecting the main branch • Merging is the process of bringing changed from two branches together • Moving from one branch to the other is called checkout
13. Key Concepts (push / pull) git push remote-name branch, git pull remote-name branch • Git push is saving your commits to the remote repository(online) • Git pull is getting recent commits from the remote repository to your local machine NB: Set a remote name git remote set-url {remote-name} {remote-url}
14. Additional resources • Official git site and tutorial ◦ http://git-scm.com • Github guides ◦ https://guides.github.com • Atlassian git tutorial ◦ https://www.atlassian.com/git • Git Immersion tutorials ◦ http://gitimmersion.com
15. QUESTIONS