To Triumph: Unlock SVN to GitHub in 19 Steps
Migrating from SVN to GitHub Enterprise is a significant undertaking for any development team. Proper planning and execution are crucial to ensure a smooth transition without disrupting ongoing projects. Below is a comprehensive checklist covering key aspects of the migration process:
Team Workflows:
1. Determine how builds will run:
- Evaluate existing build processes.
- Adapt build scripts and configurations to Git.
- Test builds in the new environment.
2. Decide when tests will run:
- Integrate testing into the CI/CD pipeline.
- Define when automated tests will be triggered.
- Ensure a balance between frequent testing and workflow efficiency.
3. Develop a release management process:
- Establish versioning conventions.
- Outline the steps from code commit to deployment.
- Implement a release calendar for coordinated deployments.
4. Move code reviews to pull requests:
- Train teams on GitHub’s pull request workflow.
- Emphasize the importance of code reviews.
- Encourage discussions and collaboration within pull requests.
Branching Strategy:
5. Pick a Git branching strategy:
- Choose a branching model (e.g., Gitflow, GitHub flow).
- Align with the team’s workflow and project needs.
6. Document the branching strategy:
- Clearly document the chosen strategy.
- Explain why it was selected.
- Provide guidance on how legacy branches map to the new strategy.
History:
7. Decide how long to keep legacy version control running:
- Define a sunset plan for SVN.
- Consider read-only access for historical purposes.
8. Identify branches that need to migrate:
- List all active and critical branches.
- Assess the necessity of migrating older branches.
9. Create breadcrumbs:
- Develop documentation or scripts to guide engineers back to SVN if needed.
- Ensure a seamless transition for those who need to reference the legacy system.
Binaries and Tools:
10. Identify binaries and undiffable files:
- Exclude unnecessary binaries and large files from the Git repository.
- Consider using Git-LFS for managing large files.
11. Decide on an approach for delivering tools and libraries:
- Utilize package managers like NuGet for managing dependencies.
- Clearly communicate the new approach to the development team.
Training:
12. Identify training materials:
- Curate or create materials specific to Git and GitHub usage.
- Include guides for the chosen branching strategy.
13. Plan training events:
- Schedule workshops or training sessions.
- Offer written materials and video tutorials for asynchronous learning.
14. Identify team members as local Git experts:
- Designate individuals within the team to serve as go-to resources.
- Foster a supportive environment for knowledge sharing.
Code Migration:
15. Perform multiple test runs:
- Conduct trial migrations to identify and resolve potential issues.
- Validate the accuracy of migrated data.
16. Identify and communicate a cutover time:
- Schedule a specific time for the final migration.
- Communicate the cutover plan to the entire team.
17. Create the new Git repo:
- Set up the GitHub Enterprise repository.
- Configure repository settings and permissions.
18. Set the old system to read-only:
- Ensure no further changes can be made to SVN.
- Redirect developers to the new Git repository.
19. Migrate the main branch first, then other branches:
- Begin with the main development branch.
- Gradually migrate other branches to minimize disruptions.
By following this comprehensive checklist, your team can navigate the migration from SVN to GitHub Enterprise with confidence, ensuring a smooth transition and maximizing the benefits of modern version control systems.
