Intro to Git Devnet-1080 Cisco Live 2018
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The document provides an overview of Git and version control. It discusses how Git allows for snapshots of files and safe experimentation. It then covers the basics of Git including configuring user information, cloning repositories, adding and committing files, branching and merging, and sharing changes through pushes. The presentation aims to introduce developers to the fundamentals of using Git and its various commands and features.
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Intro to Git Devnet-1080 Cisco Live 2018
- 1. #CLUS
- 2. Ashley Roach Principal Engineer Evangelist DEVNET-1080 Introduction to Git
- 3. Agenda © 2018 Cisco and/or its affiliates. All rights reserved. Cisco Public#CLUS • Introduction • Quick overview of Git • Workshop • Resources 3DEVNET-1080
- 4. © 2018 Cisco and/or its affiliates. All rights reserved. Cisco Public#CLUS WHY AREWE HERE? It’s kindof like: - Snapshots ofVMs - Incremental backups of files - Wiki versioning When you make a mistake or want to do some experimenting, you can do that in a safe way 5DEVNET-1080
- 5. Why version control?To Protect yourself and others
- 6. What does this have to do with Networking or Data Center?
- 7. © 2018 Cisco and/or its affiliates. All rights reserved. Cisco Public#CLUS NetDevOps CICD Pipeline Demonstration Create Proposed Branch Update Configuration Test Configuration Push Proposed Changes Build Automation StartsBuild Test NetworkDeploy Changes and Test Send Notification Automated Pipeline Credit: Hank Preston DEVNET-1080 8DEVNET-1080
- 8. © 2018 Cisco and/or its affiliates. All rights reserved. Cisco Public#CLUS Git vs. GitHub Git is an open source distributed version control system / technology GitHub is a commercial company, that runs GitHub.com based on Git VCS 9DEVNET-1080
- 10. © 2018 Cisco and/or its affiliates. All rights reserved. Cisco Public#CLUS DISTRIBUTED VERSION CONTROL • Opens up to new workflows: git flow • Each system has an exact replica of the repo as other collaborators. https://git-scm.com/images/about/[email protected] 11DEVNET-1080
- 11. © 2018 Cisco and/or its affiliates. All rights reserved. Cisco Public#CLUS Under the hood • Changes are stored in trees • Trees contain changed files • Commits contain trees http://git-scm.com/figures/18333fig0903-tn.png 12DEVNET-1080
- 12. © 2018 Cisco and/or its affiliates. All rights reserved. Cisco Public#CLUS Getting Started with Git Starting from GitHub (screenshot flow of new project) Starting from your workstation (git init) 13DEVNET-1080
- 13. © 2018 Cisco and/or its affiliates. All rights reserved. Cisco Public#CLUS Getting Started with CLI: GIT CONFIG • So you can be held accountable, configure git $ git config --global user.name "Your Name Comes Here" $ git config --global user.email [email protected] 14DEVNET-1080
- 14. © 2018 Cisco and/or its affiliates. All rights reserved. Cisco Public#CLUS Getting Started: Cloning Projects • No password • Set up SSH key on remote server (e.g. ssh-keygen) $ git clone [email protected]:aroach/upgraded-guacamole.git $ git clone https://github.com/aroach/upgraded-guacamole.git 15DEVNET-1080
- 15. © 2018 Cisco and/or its affiliates. All rights reserved. Cisco Public#CLUS Getting Started: Local Repository 16DEVNET-1080
- 16. © 2018 Cisco and/or its affiliates. All rights reserved. Cisco Public#CLUS What’s inside .git? 17DEVNET-1080
- 17. © 2018 Cisco and/or its affiliates. All rights reserved. Cisco Public#CLUS © 2018 Cisco and/or its affiliates. All rights reserved. Cisco Public#CLUS 19DEVNET-1080
- 18. © 2018 Cisco and/or its affiliates. All rights reserved. Cisco Public#CLUS GIT ADD • Add any files in your repository to git “stage” $ git add . https://git-scm.com/images/about/[email protected] 21DEVNET-1080
- 19. © 2018 Cisco and/or its affiliates. All rights reserved. Cisco Public#CLUS STAGING AREA Hat tip: @GeorgiaReh 22DEVNET-1080
- 20. © 2018 Cisco and/or its affiliates. All rights reserved. Cisco Public#CLUS GIT COMMIT • Store your changes into a commit • Saves all of your changes together / save point • Commit does NOT push $ git commit –m ’Initial commit’ 23DEVNET-1080
- 21. © 2018 Cisco and/or its affiliates. All rights reserved. Cisco Public#CLUS Git Log: History of commits 24DEVNET-1080
- 22. © 2018 Cisco and/or its affiliates. All rights reserved. Cisco Public#CLUS BRANCHING:Your safe place • Makes a pointer to your code • Moves HEAD around http://git-scm.com/figures/18333fig0307-tn.png $ git branch <name> $ git branch testing $ git commit –m “new” $ git checkout master 25DEVNET-1080
- 23. © 2018 Cisco and/or its affiliates. All rights reserved. Cisco Public#CLUS MERGING • git merge <topic> • You must be on the branch you want to merge INTO when you execute this command (e.g. master) $ git merge <branch> 26DEVNET-1080
- 24. © 2018 Cisco and/or its affiliates. All rights reserved. Cisco Public#CLUS GOING BACKWARDS • Generate a new commit that undoes all of the changes introduced in <commit>, then apply it to the current branch. $ git revert <commit> 27DEVNET-1080
- 25. © 2018 Cisco and/or its affiliates. All rights reserved. Cisco Public#CLUS SHAREYOUR CHANGES • git push <destination> <branch> • git push origin master $ git remote add <name> <url> $ git push <name> <branch> $ git push origin master 28DEVNET-1080
- 26. © 2018 Cisco and/or its affiliates. All rights reserved. Cisco Public#CLUS GIT CLIENTS • CLI Client • IDE Clients • VIM: airblade/vim-gitgutter • Emacs: magit • GUI Clients • SourceTree • Git Kracken 29DEVNET-1080
- 27. © 2018 Cisco and/or its affiliates. All rights reserved. Cisco Public#CLUS © 2018 Cisco and/or its affiliates. All rights reserved. Cisco Public#CLUS 32DEVNET-1080
- 28. © 2018 Cisco and/or its affiliates. All rights reserved. Cisco Public#CLUS © 2018 Cisco and/or its affiliates. All rights reserved. Cisco Public#CLUS 33DEVNET-1080
- 29. © 2018 Cisco and/or its affiliates. All rights reserved. Cisco Public#CLUS Come find me after today… I’ll be waiting Ashley Roach • [email protected] • @aroach • http://github.com/aroach • http://linkedin.com/in/ashleyroach Cisco DEVNET • @CiscoDevNet • http://github.com/CiscoDevNet 34DEVNET-1080
- 30. © 2018 Cisco and/or its affiliates. All rights reserved. Cisco Public#CLUS Cisco WebexTeams Questions? Use Cisco Webex Teams (formerly Cisco Spark) to chat with the speaker after the session Find this session in the Cisco Live Mobile App Click “Join the Discussion” Install Webex Teams or go directly to the team space Enter messages/questions in the team space How Webex Teams will be moderated by the speaker until June 18, 2018. cs.co/ciscolivebot# DEVNET-1080 © 2018 Cisco and/or its affiliates. All rights reserved. Cisco Public 35 1 2 3 4 35
- 31. © 2018 Cisco and/or its affiliates. All rights reserved. Cisco Public#CLUS Complete your online session evaluation © 2018 Cisco and/or its affiliates. All rights reserved. Cisco Public#CLUS Give us your feedback to be entered into a Daily Survey Drawing. Complete your session surveys through the Cisco Live mobile app or on www.CiscoLive.com/us. Don’t forget: Cisco Live sessions will be available for viewing on demand after the event at www.CiscoLive.com/Online. 36Presentation ID
- 32. © 2018 Cisco and/or its affiliates. All rights reserved. Cisco Public#CLUS © 2018 Cisco and/or its affiliates. All rights reserved. Cisco Public#CLUS Demos in the Cisco campus Walk-in self-paced labs Meet the engineer 1:1 meetings Related sessions Continue your education Presentation ID 37
- 34. #CLUS