Command Line Applications in Go

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Introduction to the course

Setting up your environment

Go 101: Variables, Values & Types

Numerical Types

Collections in Go

Go 101: Conditionals & Loops

Conditionals: If

Conditionals: Else

Conditionals: Else if

Conditionals: Switch Statements

Loops: for keyword

Loops: Conditionals

Loops: Incremental

Loops: Range Keyword

Loops: Range over Slice

Loops: Range over Map

Go 101: Functions & Pointers

Functions: Basics

Functions: Multiple Parameters

Functions: Return Values

Pointers: Introduction

Pointers: Modifying Values

Pointers: Nil Guards

Go 101: Packages

Packages: The Standard library

Starting a new project

Reading from a file

Challenge: Reading from a file

A Simple Word Counter

Challenge: Word Counter

Edge Cases: Empty Input

Edge Cases: All Spaces

Table Driven Testing

A better algorithm

Introduction to input

Reading large files

Unicode & Runes

The bufio package

Decoupling & io.Reader

Command line arguments

Handling multiple errors

Closing files with defer

Adding new features

File offsets and seeking

Variadic parameters

Method receivers

Single pass algorithm

Organizing our code

Package visibility

Constructor arguments

Whitebox vs Blackbox testing

Introduction to concurrency & data

Goroutines & Waitgroups

Handling async errors

Introduction to Advanced Testing

Benchmark testing

End to end testing (e2e)

e2e: Testing files

e2e: Multiple files

Determinstic output

e2e: Testing flags

Creating test helpers

Executing commands

Passing in input

Configuring commands

Asynchronous execution

Graceful shutdown

context.Context

Building a process guard

Opening an editor

Fuzzy finding with fzf

Introduction to Networking & Files

File permissions

Walking the filesystem

Lockfiles & PIDFiles

The net package

The net/http package

Marshaling & unmarshaling data

Sending files with HTTP

Testing HTTP Requests

Introduction to Powerful CLI Apps

Subcommand Abstraction

Compressing files & data with GZip

Hashing files & data

Password & Secure Input

Have I been pwned?

Environment variables

Configuration files

Advanced Error Handling

Embedding Files

Cross platform code

Regular expressions

UI: A Loading Spinner

UI: A Progress Bar

Adding color to Stdout

Working with images

Distributing an application

An Application Builder

Introduction to Popular CLI packages

Subcommands with Cobra

POSIX flags with pFlag

Storing data with SQLite

Database Migrations with Migrate

Repositories with SQLc

Color with color

TUI with Bubble Tea

Test assertions with Testify

Mocking with go-mock

Releasing with Go releaser

Introduction to Final Project

Obtaining staged changes

Installing Ollama

Prompting the LLM

Commiting our messages

Adding in a spinner

Adding another provider

Adding in CLI flags

Provider registration

Integration testing

Homework and improvements

Conclusion and closing remarks

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Edge Cases: All Spaces - Command Line Applications in Go | Dreams of Code

Command Line Applications in Go

Counting Words

Edge Cases: All Spaces

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Go

Output

Run your code to see output