Book Image

Git: Mastering Version Control

By : Aske Olsson, Jakub Narębski, Ferdinando Santacroce, Rasmus Voss
Book Image

Git: Mastering Version Control

By: Aske Olsson, Jakub Narębski, Ferdinando Santacroce, Rasmus Voss

Overview of this book

Git is one of the most popular types of Distributed Version Control System. Since its inception, it has attracted skilled developers due to its robust, powerful, and reliable features. Like most powerful tools, Git can be hard to approach for the newcomers. However, this learning path will help you overcome this fear and become adept at all the basic and advanced tasks in Git. This course starts with an introduction to version control systems before you delve deeply into the essentials of Git. This serves as a primer for the topics to follow such as branching and merging, creating and managing a GitHub personal repository, and fork and pull requests. You'll also learn how to migrate from SVN using Git tools or TortoiseGit and migrate from other VCSs, concluding with a collection of resources, links, and appendices. As you progress on to the next module, you will learn how you can automate the usual Git processes by utilizing the hook system built into Git. It also covers advanced repository management, including different options to rewrite the history of a Git repository before you discover how you can work offline with Git, how to track what is going on behind the scenes, and how to use the stash for different purposes. Moving forward, you will gain deeper insights into Git's architecture, its underlying concepts, behavior, and best practices. It gives a quick implementation example of using Git for a collaborative development of a sample project to establish the foundation knowledge of Git operational tasks and concepts. By exploring advanced Git practices, you will attain a deeper understanding of Git’s behavior, allowing you to customize and extend existing recipes and write your own. This Learning Path is a blend of content, all packaged up keeping your journey in mind. It includes content from the following Packt products: • Git Essentials, Ferdinando Santacroce • Git Version Control Cookbook, Aske Olsson and Rasmus Voss • Mastering Git, Jakub Nar?bski
Table of Contents (36 chapters)
Git: Mastering Version Control
Credits
Preface
3
Git Fundamentals – Working Remotely
Bibliography
Index

Writing a tree object to the database


Now, we have manually created objects in the Git database, but as nothing point to these objects, we have to remember them by their SHA-1 identifier. Furthermore, only the content of the files is stored in the database, so we learn to create a tree object that will refer to the blobs created.

Getting ready

We'll use the same repository of the last examples with the objects we created in the database.

How to do it...

We'll start by adding the first version of mytest.txt as follows:

$ git update-index --add --cacheinfo 100644 \
926e8ffd3258ed6edd1e254438f02fd24e417acc mytest.txt

Now we can write the content of the staging area to the database:

$ git write-tree
4c4493f8029d491d280695e263e24772ab6962ce

We can update and write a tree for the second version of mytest.txt as follows:

$ git update-index --cacheinfo 100644 \
6b3da706d14c3820597ec7109f163bc144dcbb22 mytest.txt
$ git write-tree
2b9697438318f3a62a5e85d14a3b52d69b962907

Finally, we can use the object...