write professional command  - line programs in Go.png

data.tar.gz

Go run main.go

Run main.sh

Run go test

Run go test2

GoLive

GoLiveTesting

Multi-git-Custom

Pre+main-v0.2

Main_to_cmd

Run go test-Coverage

Ginkgo

Ginkgo-BDD

Ginkgo-e2e

Cobra

Cobra-NoInstall

Cobra-NoInstall-FullApp

Final_Cobra_Multi-git

Viper

Viper-etcd

Viper-Cobra

SelfUpdating

Make

Special build

Embedding_Data

Go run main.go-Simple

In this course you will learn why Go is an awesome language for writing command-line programs. You will learn how to structure your Go programs, how to write idiomatic Go code, how to test your programs and how to amaze your users, peers and managers. 

The focus is on command-line programs in order to keep the course down to earth, but most of the principles and best practices you will learn apply to any Go program.

Write Professional Command-line Programs in Go

 
## Building packages

Go uses caching of pre-built dependencies. To see what would happen if we had to build everything from scratch we can use the `-a` and `-n` flags. The `-a` flag forces a rebuild of all packages, and t. The `-n` flag just prints the commands that need to be run but doesn't actually run them. In combination, we can see what a full build entails without actually wasting time. The output is pretty verbose even for a small program like multi-git, so we will review just a few interesting bits after redirecting the output to a file. It must redirect standard output AND standard error streams:

```
$ go build -n -a &> 1.txt
```

The resulting file has more than 3,000 lines!

```
$ cat 1.txt| wc -l
    3152
```

Let's review some of the highlights. First, Go will build internal packages like internal or cpu using the asm (assembly language) tool and compile tool:









 
# Building packages

Go uses caching of pre-built dependencies. To see what would happen if we had to build everything from scratch we can use the `-a` and `-n` flags. The `-a` flag forces a rebuild of all packages, and t. The `-n` flag just prints the commands that need to be run but doesn't actually run them. In combination, we can see what a full build entails without actually wasting time. The output is pretty verbose even for a small program like multi-git, so we will review just a few interesting bits after redirecting the output to a file. It must redirect standard output AND standard error streams:

```
$ go build -n -a &> 1.txt
```

The resulting file has more than 3,000 lines!

```
$ cat 1.txt| wc -l
    3152
```

Let's review some of the highlights. First, Go will build internal packages like internal or cpu using the asm (assembly language) tool and compile tool:









 
# Building packages

Go uses caching of pre-built dependencies. To see what would happen if we had to build everything from scratch we can use the `-a` and `-n` flags. The `-a` flag forces a rebuild of all packages, and t. The `-n` flag just prints the commands that need to be run but doesn't actually run them. In combination, we can see what a full build entails without actually wasting time. The output is pretty verbose even for a small program like multi-git, so we will review just a few interesting bits after redirecting the output to a file. It must redirect standard output AND standard error streams:

```
＄ go build -n -a &> 1.txt
```

The resulting file has more than 3,000 lines!

```
＄ cat 1.txt| wc -l
    3152
```

Let's review some of the highlights. First, Go will build internal packages like internal or cpu using the asm (assembly language) tool and compile tool:









In this lesson, we'll take a look into building Go programs and discuss the build command and some flags that will help us analyze what's going on when building a package and how dependencies are managed.

Building Go Packages

Overview

Restructuring multi-git

Testing 1,2,3...

Adding Smart Command-Line Parsing

Adding Advanced Configuration

Adding Bells and Whistles

Summary

Building Go Packages

Building packages