Book Image

Git Version Control Cookbook - Second Edition

By : Kenneth Geisshirt, Emanuele Zattin(EUR), Aske Olsson, Rasmus Voss
Book Image

Git Version Control Cookbook - Second Edition

By: Kenneth Geisshirt, Emanuele Zattin(EUR), Aske Olsson, Rasmus Voss

Overview of this book

Git is one of the most popular tools for versioning. With over 100 practical, self-contained tutorials, this updated version of the bestselling Git Version Control Cookbook examines the common pain points and best practices to help you solve problems related to versioning. Each recipe addresses a specific problem and offers a proven, best-practice solution with insights into how it works. You’ll get started by learning about the Git data model and how it stores files, along with gaining insights on how to commit changes to a database. Using simple commands, you’ll also understand how to navigate through the database. Once you have accustomed yourself to the basics, you’ll explore techniques to configure Git with the help of comprehensive examples and configuration targets. Further into the book, you’ll get up to speed with branches and recovery from mistakes. You’ll also discover the features of Git rebase and how to use regular Git to merge other branches. The later chapters will guide you in exploring Git notes and learning to utilize the update, list, and search commands. Toward the concluding chapters, you’ll focus on repository maintenance, patching, and offline sharing. By the end of this book, you’ll have grasped various tips and tricks, and have a practical understanding of best-practice solutions for common problems related to versioning.
Table of Contents (19 chapters)
Title Page
Copyright and Credits
Packt Upsell
Contributors
Preface
Index

Finding bottlenecks in the source tree


Often, the development teams know where the bottleneck in the source tree is, but it can be challenging to convince the management that you need resources to rewrite some code. However, with Git, it is fairly simple to extract that type of data from the repository.

 

Getting ready

Start by checking out the stable-3.1 release as follows:

$ git checkout stable-3.1 
Branch stable-3.1 set up to track remote branch stable-3.1 from origin. 
Switched to a new branch 'stable-3.1' 

How to do it...

We want to start by listing some stats for one commit, and then we can extend the examples to larger chunks of commits:

  1. The first option we will be using is --dirstat for git log as follows:
$ git log -1 --dirstat 
commit da6e87bc373c54c1cda8ed563f41f65df52bacbf 
Author: Matthias Sohn <[email protected]> 
Date:   Thu Oct 3 17:22:08 2013 +0200 
 
    Prepare post 3.1.0 builds 
 
    Change-Id: I306a3d40c6ddb88a16d17f09a60e3d19b0716962 
    Signed-off-by: Matthias...