Book Image

Mastering Git

5 (1)
Book Image

Mastering Git

5 (1)

Overview of this book

Git is one of the most popular types of Source Code Management (SCM) and Distributed Version Control System (DVCS). Despite the powerful and versatile nature of the tool enveloping strong support for nonlinear development and the ability to handle large projects efficiently, it is a complex tool and often regarded as “user-unfriendly”. Getting to know the ideas and concepts behind the architecture of Git will help you make full use of its power and understand its behavior. Learning the best practices and recommended workflows should help you to avoid problems and ensure trouble-free development. The book scope is meticulously designed to help you gain deeper insights into Git's architecture, its underlying concepts, behavior, and best practices. Mastering Git starts with 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. Furthermore, as you progress through the book, the tutorials provide detailed descriptions of various areas of usage: from archaeology, through managing your own work, to working with other developers. This book also helps augment your understanding to examine and explore project history, create and manage your contributions, set up repositories and branches for collaboration in centralized and distributed version control, integrate work from other developers, customize and extend Git, and recover from repository errors. 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.
Table of Contents (19 chapters)
Mastering Git
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface
Index

An introduction to Git internals


To really understand and make good use of at least some of the methods described in this chapter, you would need to understand at least the very basics of Git internals. Among others, you would need to know how Git stores the information about revisions.

One would also require to know how to manipulate such data and how to do it from a script. Git provides a set of low-level commands to use in scripts, as a supplement to the user-facing high-level commands. These commands are very flexible and powerful, though perhaps not very user-friendly. Knowledge about this scripted interface will help us also administer the Git repositories via hooks in Chapter 11, Git Administration.

Git objects

In Chapter 2, Exploring Project History, you have learned that Git represents history as the Directed Acyclic Graph (DAG) of revisions, where each revision is a graph node represented as a commit object. Each commit is identified by a SHA-1 identifier. We can use this identifier...