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

Finding bugs with git bisect


Git provides a couple of tools to help you debug issues in your projects. These tools can be extremely useful, especially in the case of a software regression, a software bug which makes a feature stop functioning as intended after a certain revision. If you don't know where the bug is, and there have been dozens or hundreds of commits since the last state where you know the code worked, you'll likely turn to git bisect for help.

The bisect command searches semi-automatically step by step through the project history, trying to find the revision that introduced the bug. In each step, it bisects the history into roughly equal parts, and asks whether there is a bug in the dividing commit. It then uses the answer to eliminate one of the two sections, and reduces the size of the revision range where there can be a commit that introduced the bug.

Suppose version 1.14 of your project worked, but the release candidate, 1.15-rc0, for the new version crashes. You go back...