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Git Version Control Cookbook

Git Version Control Cookbook

By : Olsson, Voss
4 (3)
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Git Version Control Cookbook

Git Version Control Cookbook

4 (3)
By: Olsson, Voss

Overview of this book

This practical guide contains a wide variety of recipes, taking you through all the topics you need to know about to fully utilize the most advanced features of the Git system. If you are a software developer or a build and release engineer who uses Git in your daily work and want to take your Git knowledge to the next level, then this book is for you. To understand and follow the recipes included in this book, basic knowledge of Git command-line code is mandatory.
Table of Contents (14 chapters)
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Preface
Preface
What this book covers
What you need for this book
Who this book is for
Conventions
Reader feedback
Customer support
Free Chapter
1
1. Navigating Git
1. Navigating Git
Introduction
Git's objects
The three stages
Viewing the DAG
Extracting fixed issues
Getting a list of the changed files
Viewing history with Gitk
Finding commits in history
Searching through history code
2
2. Configuration
2. Configuration
Configuration targets
Querying the existing configuration
Templates
A .git directory template
A few configuration examples
Git aliases
The refspec exemplified
3
3. Branching, Merging, and Options
3. Branching, Merging, and Options
Introduction
Managing your local branches
Branches with remotes
Forcing a merge commit
Using git rerere to merge known conflicts
The difference between branches
4
4. Rebase Regularly and Interactively, and Other Use Cases
4. Rebase Regularly and Interactively, and Other Use Cases
Introduction
Rebasing commits to another branch
Continuing a rebase with merge conflicts
Rebasing selective commits interactively
Squashing commits using an interactive rebase
Changing the author of commits using a rebase
Auto-squashing commits
5
5. Storing Additional Information in Your Repository
5. Storing Additional Information in Your Repository
Introduction
Adding your first Git note
Separating notes by category
Retrieving notes from the remote repository
Pushing notes to a remote repository
Tagging commits in the repository
6
6. Extracting Data from the Repository
6. Extracting Data from the Repository
Introduction
Extracting the top contributor
Finding bottlenecks in the source tree
Grepping the commit messages
The contents of the releases
7
7. Enhancing Your Daily Work with Git Hooks, Aliases, and Scripts
7. Enhancing Your Daily Work with Git Hooks, Aliases, and Scripts
Introduction
Using a branch description in the commit message
Creating a dynamic commit message template
Using external information in the commit message
Preventing the push of specific commits
Configuring and using Git aliases
Configuring and using Git scripts
Setting up and using a commit template
8
8. Recovering from Mistakes
8. Recovering from Mistakes
Introduction
Undo – remove a commit completely
Undo – remove a commit and retain the changes to files
Undo – remove a commit and retain the changes in the staging area
Undo – working with a dirty area
Redo – recreate the latest commit with new changes
Revert – undo the changes introduced by a commit
Reverting a merge
Viewing past Git actions with git reflog
Finding lost changes with git fsck
9
9. Repository Maintenance
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9. Repository Maintenance
Introduction
Pruning remote branches
Running garbage collection manually
Turning off automatic garbage collection
Splitting a repository
Rewriting history – changing a single file
Back up your repositories as mirror repositories
A quick submodule how-to
Subtree merging
Submodule versus subtree merging
10
10. Patching and Offline Sharing
10. Patching and Offline Sharing
Introduction
Creating patches
Creating patches from branches
Applying patches
Sending patches
Creating Git bundles
Using a Git bundle
Creating archives from a tree
11
11. Git Plumbing and Attributes
11. Git Plumbing and Attributes
Introduction
Displaying the repository information
Displaying the tree information
Displaying the file information
Writing a blob object to the database
Writing a tree object to the database
Writing a commit object to the database
Keyword expansion with attribute filters
Metadata diff of binary files
Storing binaries elsewhere
Checking the attributes of a file
Attributes to export an archive
12
12. Tips and Tricks
12. Tips and Tricks
Introduction
Using git stash
Saving and applying stashes
Debugging with git bisect
Using the blame command
Color UI in the prompt
Autocompletion
Bash prompt with status information
More aliases
Interactive add
Interactive add with Git GUI
Ignoring files
Showing and cleaning ignored files
13
Index
Index

Splitting a repository

Sometimes a project tracked with Git is not one logical project but several projects. This may be fully intentional and there is nothing wrong with it, but there can also be cases where the projects tracked in the same Git repository really should belong to two different repositories. You can imagine a project where the code base grows and at some point in time, one of the subprojects could have value as an independent project. This can be achieved by splitting the subfolders and/or files that contain the project that should have its own repository with the full history of commits touching the files and/or folders.

Getting ready

In this example, we'll use the JGit repository so we'll have some history to filter through. The subfolders we split out to are not really projects, but serve well as an example for this exercise.

  1. First, clone the Jgit repository and create local branches of the remote ones using the following command:

    git clone https://git.eclipse.org/r/jgit...
End of Section 4
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