Tool Development A - Git
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Appendix A of the lecture Tool Development taught at SAE Institute Hamburg. Introduction to version control systems, Git and Git Flow.
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Tool Development A - Git
- 1. Tool Development Appendix A: Git Nick Prühs
- 2. Objectives • To get an overview of version control systems in general • To learn how to use Git in a production environment • To understand advanced concepts of branching and merging 2 / 58
- 3. Local Version Control 3 / 58
- 4. Centralized Version Control 4 / 58
- 5. Distributed Version Control 5 / 58
- 6. Version Deltas 6 / 58
- 7. Version Snapshots 7 / 58
- 8. Git Areas 8 / 58
- 9. Git Lifecycle 9 / 58
- 10. DEMO • Installing Git • Installing SourceTree • Creating a GitHub account • Creating a Git repository • Cloning the repository 10 / 58
- 11. DEMO • Check file status • Adding new files • Viewing changes • Staging modified files • Moving files • Removing files 11 / 58
- 12. DEMO • Pulling • Commiting changes • Pushing 12 / 58
- 13. DEMO • Unstaging files • Reverting files 13 / 58
- 14. DEMO • Viewing history • Ignoring files • Tagging 14 / 58
- 15. Git Commit Tree 15 / 58
- 16. Git Commit & Parents 16 / 58
- 17. Git Branch 17 / 58
- 18. Git Branches 18 / 58
- 19. Git HEAD 19 / 58
- 20. Switching Branches 20 / 58
- 21. Adding Commits 21 / 58
- 22. Switching Branches 22 / 58
- 23. Divergent History 23 / 58
- 24. Merging Branches 24 / 58
- 25. Merging Branches 25 / 58
- 26. Origin 26 / 58
- 27. Origin 27 / 58
- 28. Origin 28 / 58
- 29. Hint Split your work up into small, unrelated commits! 29 / 78
- 30. Git Commit Messages 30 / 58 • ADDED • CHANGED • REMOVED • FIXED
- 31. GitFlow • Originally developed by Vincent Driessen • Assigns very specific roles to different branches, and defines how and when they should interact • Allows merging and branching to be part of your daily workflow 31 / 58
- 32. Main Branches • master • origin/master HEAD is always ready for production • develop • origin/develop HEAD always contains the latest delivered development changes • Nightly builds are created from this branch • Whenever considered stable, merged back into master and tagged 32 / 58
- 33. Main Branches 33 / 58
- 34. Supporting branches • Feature branches • Allow parallel development • Make tracking features easier • Release branches • Help preparing for releases • Hotfix branches • Enable you to quickly fix live problems 34 / 58
- 35. Feature Branches • Branch from and merge back into develop • Used for developing new features • Exists while the feature is in development • Will eventually be • Merged back, to include the new feature in the next release, or • Discarded, if the feature should not be included • Never directly interact with the master branch 35 / 58
- 36. Feature Branches 36 / 58
- 37. Hint Merging with the “no fast-forward” option causes the merge to always create a new commit. This makes tracking of your branches a lot easier! 37 / 78
- 38. Release Branches • Branch from develop, and merge back into develop and master • Created when all desired features for the next release have been merged back into develop • Supports preparation of a new production release • Setting up meta-data such as version numbers or database connections • Generating API documentation • Features for the next release can already merge back into develop 38 / 58
- 39. Release Branches 39 / 58
- 40. Hint Whenever changes are merged back into master, this is a new production release by definition! 40 / 78
- 41. Hotfix Branches • Branch from master, and merge back into develop and master • Created when a critical bug in a production release has to be resolved immediately • Other team members can continue working on new features or the next release 41 / 58
- 42. Hotfix Branches 42 / 58
- 43. Hint Unlike the two main branches, all supporting branches will be merged and removed eventually! 43 / 78
- 44. References • Chacon, Straub. Pro Git. 2nd Edition. Apress, December 24, 2014. http://www.git-scm.com/doc • Vincent Driessen. A successful Git branchin model. http://nvie.com/posts/a-successful-git-branching- model/, January 5, 2010. • Atlassian. Gitflow Workflow. https://www.atlassian.com/git/workflows#!workflo w-gitflow, June 2014. 44 / 58
- 45. Thank you for your attention! Contact Mail [email protected] Blog http://www.npruehs.de Twitter @npruehs Github https://github.com/npruehs 45 / 58