Powerful Command Line Applications in Go Build Fast and Maintainable Tools 1st Edition by Ricardo Gerardi 168050696X 9781680506969

Powerful Command Line Applications in Go Build Fast and Maintainable Tools 1st Edition by Ricardo Gerardi – Ebook PDF Instant Download/Delivery: 168050696X, 9781680506969

Full download Powerful Command Line Applications in Go Build Fast and Maintainable Tools 1st Edition after payment

Product details:

ISBN 10: 168050696X

ISBN 13: 9781680506969

Author: Ricardo Gerardi

Whether you want to automate tasks, analyze data, parse logs, talk to network services, or address other systems requirements, writing your own command-line tool may be the fastest – and perhaps the most fun – way to do it. The Go programming language is a great choice for developing tools that are fast, reliable, and cross-platform. Create command-line tools that work with files, connect to services, and even manage external processes, all while using tests and benchmarks to ensure your programs are fast and correct. When you want to develop cross platform command-line tools that are fast and reliable, use Go, a modern programming language that combines the reliability of compiled languages with the ease of use and flexibility of dynamic typed languages. Work through practical examples to develop elegant and efficient tools by applying Go’s rich standard library, its built in support for concurrency, and its expressive syntax. Use Go’s integrated testing capabilities to automatically test your tools, ensuring they work reliably even across code refactoring. Develop CLI tools that interact with your users by using common input/output patterns, including environment variables and flags. Handle files to read or persist data, and manipulate paths consistently in cross-platform scenarios. Control processes and handle signals, and use a benchmark driven approach and Go’s concurrency primitives to create tools that perform well. Use powerful external libraries such as Cobra to create modern and flexible tools that handle subcommands, and develop tools that interact with databases, APIs, and network services. Finally, leverage what you learned by tackling additional challenges at the end of each chapter. What You Need: Go 1.8 or higher, an internet connection to download the example files and additional libraries, and a text editor to write your programs.

Powerful Command Line Applications in Go Build Fast and Maintainable Tools 1st Table of contents:

1. Your First Command-Line Program in Go

Building the Basic Word Counter

Testing the Basic Word Counter

Adding Command-Line Flags

Compiling Your Tool for Different Platforms

Exercises

Wrapping Up

2. Interacting with Your Users

Organizing Your Code

Defining the To-Do API

Creating the Initial To-Do Command-Line Tool

Testing the Initial CLI Implementation

Handling Multiple Command-Line Options

Display Command-Line Tool Usage

Improving the List Output Format

Increasing Flexibility with Environment Variables

Capturing Input from STDIN

Exercises

Wrapping Up

3. Working with Files in Go

Creating a Basic Markdown Preview Tool

Writing Tests for the Markdown Preview Tool

Adding Temporary Files to the Markdown Preview Tool

Using Interfaces to Automate Tests

Adding an Auto-Preview Feature

Cleaning Up Temporary Files

Improving the Markdown Preview Tool with Templates

Exercises

Wrapping Up

4. Navigating the File System

Developing a File System Crawler

Testing with Table-Driven Testing

Deleting Matched Files

Testing with the Help of Test Helpers

Logging Deleted Files

Archiving Files

Exercises

Wrapping Up

5. Improving the Performance of Your CLI Tools

Developing the Initial Version of colStats

Writing Tests for colStats

Benchmarking Your Tool

Profiling Your Tool

Reducing Memory Allocation

Tracing Your Tool

Improving the colStats Tool to Process Files Concurrently

Reduce Scheduling Contention

Exercises

Wrapping Up

6. Controlling Processes

Executing External Programs

Handling Errors

Writing Tests for Goci

Defining a Pipeline

Adding Another Step to the Pipeline

Handling Output from External Programs

Running Commands with Contexts

Integration Tests with a Local Git Server

Testing Commands with Mock Resources

Handling Signals

Exercises

Wrapping Up

7. Using the Cobra CLI Framework

Starting Your Cobra Application

Navigating Your New Cobra Application

Adding the First Subcommand to Your Application

Starting the Scan Package

Creating the Subcommands to Manage Hosts

Testing the Manage Hosts Subcommands

Adding the Port Scanning Functionality

Using Viper for Configuration Management

Generating Command Completion and Documentation

Exercises

Wrapping Up

8. Talking to REST APIs

Developing a REST API Server

Testing the REST API Server

Completing the REST API Server

Developing the Initial Client for the REST API

Testing the Client Without Connecting to the API

Viewing a Single Item

Adding an Item

Testing HTTP Requests Locally

Completing and Deleting Items

Executing Integration Tests

Exercises

Wrapping Up

9. Developing Interactive Terminal Tools

Initializing the Pomodoro Application

Storing Data with the Repository Pattern

Testing the Pomodoro Functionality

Building the Interface Widgets

Organizing the Interface’s Layout

Building the Interactive Interface

Initializing the CLI with Cobra

Exercises

Wrapping Up

10. Persisting Data in a SQL Database

Getting Started with SQLite

Go, SQL, and SQLite

Persisting Data in the Database

Testing the Repository with SQLite

Updating the Application to Use the SQLite Repository

Displaying a Summary to the Users

Exercises

Wrapping Up

11. Distributing Your Tool

Starting the Notify Package

Including OS-Specific Data

Including OS-Specific Files in the Build

Testing the Notify Package

Conditionally Building Your Application

Cross-Compiling Your Application

Compiling Your Go Application for Containers

Distributing Your Application as Source Code

Exercises

Wrapping Up

People also search for Powerful Command Line Applications in Go Build Fast and Maintainable Tools 1st: 

8 power list critical tasks

useful powershell commands

command line power user

how to open r commander in rstudio

Tags:

Ricardo Gerardi,Powerful,Command,Applications