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Git Version Control Cookbook

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Git Version Control Cookbook

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Git Version Control Cookbook
Jul, 2014 | 340 pages
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Table of Contents (19 chapters)
Git Version Control Cookbook
Git Version Control Cookbook
Credits
Credits
About the Authors
About the Authors
About the Reviewers
About the Reviewers
www.PacktPub.com
www.PacktPub.com
Preface
Preface
Free Chapter
1
Navigating Git
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
Configuration
Configuration
Configuration targets
Querying the existing configuration
Templates
A .git directory template
A few configuration examples
Git aliases
The refspec exemplified
3
Branching, Merging, and Options
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
Rebase Regularly and Interactively, and Other Use Cases
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
Storing Additional Information in Your Repository
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
Extracting Data from the Repository
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
Enhancing Your Daily Work with Git Hooks, Aliases, and Scripts
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
Recovering from Mistakes
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
Repository Maintenance
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
Patching and Offline Sharing
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
Git Plumbing and Attributes
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
Tips and Tricks
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
Index
Index

Undo – remove a commit and retain the changes in the staging area

Of course, it is also possible to undo the commit, but keep the changes to the files in the index or the staging area so that you are ready to recreate the commit with, for example, some minor modifications.

Getting ready

We'll still use the example of the hello world repository. Make a fresh clone of the repository, or reset the master branch if you have already cloned one.

Create a fresh clone as follows:

$ git clone https://github.com/dvaske/hello_world_cookbook.git
$ cd hello_world_cookbook

We can reset the existing clone as follows:

$ cd hello_world_cookbook
$ git checkout master
$ git reset --hard origin master
HEAD is now at 3061dc6 Adds Java version of 'hello world'

How to do it...

  1. Check whether we have no files in the modified state and check the log:

    $ git status
On branch master
Your branch is up-to-date with 'origin/master'.

nothing to commit, working directory clean

$ git log --oneline
3061dc6 Adds Java version...
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