Webinar : SVN to GIT Migration

1. SVN to GIT Migration
By:
Sanjay Lakhanpal
Syed Zaigham Abbas

2.  Founded in 2004 ,HQ at Dallas TX,
present in multiple locations in USA and
India
 Leader in DevOps Transformation, Cloud
Enablement and Test Automation
 One of top 100 fastest growing
companies of Dallas twice in a row
 Clientele includes Fortune 50 companies
About Newt Global

3. Speakers
11/18/2016 Copyright 3
• Sanjay is Technical Leader, His area of expertise includes Digital
Transformation, DevOps, Test Automation Sales, Delivery and
Relationship Management
• He has 20+ years of IT industry experience and delivered multiple
enterprise scale projects for Fortune 500 customer base
SANJAY LAKHANPAL
Managing Director at
Newt Global
• Lead Engineer driving enterprise SCM tool migrations
• Hands on migration experience in migrating SVN & AccuRev to
Git
SYED ZAIGHAM ABBAS
Lead DevOps Engineer
Newt Global

4. Housekeeping Instructions
• All phones are set to mute. If you have any questions, please type them in the Chat
window located beside the presentation panel
• We have already received several questions from the registrants, which will be
answered by the speakers during the Q & A session
• We will continue to collect more questions during the session as we receive and will
try to answer them during today’s session
• In case if you do not receive answers to your question today, you will certainly
receive answers via email shortly
• Thanks for your participation and enjoy the session!
11/18/2016 Copyright 4

5. SVN to GIT Migration
Introduction
Git’s Features
Benefits of Git over SVN
Migrating from SVN to Git
Demo
Conclusion
11/18/2016 Copyright 5

6. Git Features
Repositories
URL
Branches
Commits
Commands
Colors
Visualize
11/18/2016 Copyright 6

7. Git’s Features: Repositories
As Subversion is CVCS (Centralized Version Control System) tool, for
each project there is a single repository at some detached central place
where all the history is and which you checkout and commit into.
Git works differently, each copy of the project tree (we call that the
working copy) carries its own repository around (in the .gitsubdirectory
in the project tree root). So you can have local and remote branches.
You can also have a so-called bare repositorywhich is not attached to a
working copy; that is useful especially when you want to publish your
repository
11/18/2016 Copyright 7

8. Git Features: URL
In Subversion the URLidentifies the location of the repository and the
path inside the repository, so you organize the layout of the repository
and its meaning.
Normally you would have trunk/, branches/and tags/directories.
In Gitthe URLis just the location of the repository, and it always contains
branches and tags.
One of the branches is the default (normally named master).
11/18/2016 Copyright 8

9. Git’s Features: Branches
In Subversion branches are just additional folders containing a copy of the code
base.
When an SVN branch is merged, the branch has to be deleted to prevent an
erroneous merge back to trunk in future.
GHE branches however have their own history and revision tree giving
you explicit information from where it was forked, what commits have
happened and if it has been merged into another branch or not. This
makes branch history management much easier.
In GHE, the branch history is maintained and is completely traceable.
Tracking merge history is a serious problem with SVN.
11/18/2016 Copyright 9

10. Git’s Features: Commits
Each commit has an author and a committer field, which record who
and when created the change and who committed it
Git is designed to work well with patches coming by mail -in that case,
the author and the committer will be different.
•Git config --global user.name "Your Name Comes Here"
•Git config --global user.emailyou@yourdomain.example.com
Git will try to guess your real name and email, but especially with email
it is likely to get it wrong. You can check it using git config -l and set
them with:
11/18/2016 Copyright 10

11. Git Features: Commands
•Eg- “git commit …. “
The Git commands are in the form “git command <command_name>”.
•Eg “git-commit ….”
You can interchangeably use the git-command form as well
11/18/2016 Copyright 11

12. Git Features: Colours
• Git can produce colorful output for commands
• Colors are disabled by default
11/18/2016 Copyright 12

13. Git Features: Visualize
11/18/2016 Copyright 13
Git comes with built-in
GUI tools for committing
(git-gui) and browsing
(gitk), but there are
several third-party tools
for users looking for
platform-specific
experience.
Watch your repository
using the GitHub
Desktop viewer as you
go.

14. Git Features: Visualize (Eclipse)
11/18/2016 Copyright 14

15. Benefits of Git over SVN
11/18/2016 Copyright 15
SVN GIT
Distributed Nature
User Interface Branch Handling
Single Repository Performance
Space Requirements

16. Importing an SVN repo into git
• Get read-only user access for SVN repository
• gitsvn utility is available in local environment
• Download svn-migration-scripts.jar from
https://bitbucket.org/atlassian/svn-migration-
scripts/downloads
Prerequisites:
• Get Org. name, team name and members from the respective
teams.
• Setup Organization.
• Setup Team and assign team members.
• Create repository and push the code from lab.
Setup Remote GitHub Server
11/18/2016 Copyright 16

17. Importing an SVN repo into git
•java -jar ~/svn-migration-scripts.jar authors <SVN Repo URL> > authors.txt
Create the users list from the SVN
•git svn clone --stdlayout --authors-file=authors.txt <SVN Repo URL> <GitHub Repo Name>
Clone your SVN repo into as a Git
•git remote add origin <GitHub Repo URL>
Add the GitHub repository
•git push –u origin master
Push the code to remote GitHub
•java -Dfile.encoding=utf-8 -jar ~/svn-migration-scripts.jar clean-git --force
Bring the SVN branches and tags as in local Git
•git push --all
Push the branches and tags to Remote GitHub
11/18/2016 Copyright 17

18. Demo
11/18/2016 Copyright 18

19. Contact Us
For any questions/clarifications please contact:
Satheesh Reddy, Sales Manager
Newt Global Consulting LLC.
satheeshr@newtglobalcorp.com
http://newtglobal.com/
11/18/2016 Copyright 19

20. 11/18/2016 Copyright 20