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Golang Setup

Let's just get our Go project set up and running. We'll start with a simple "Hello, World!" program.

Assignment

Create a new main.go file in your project root. It should be part of package main. Add a main function that simply prints "Hello, World!" to the console.
Create a Go module in the root of your project. Here's the command:

go mod init MODULE_NAME

I recommend naming the module by its remote Git location (you should store all your projects in Git!). For example, my GitHub name is wagslane so my module name might be github.com/wagslane/crawler.

Build your program:

go build -o crawler

Run your program:

./crawler

You should see "Hello, World!" printed to the console.

Add a .gitignore file to your project root and have Git ignore the crawler binary file.

Submit the CLI tests from your project's root. There's no penalty on failure for this lesson.

Tip

Using go build and ./crawler is a bit cumbersome. Building is best for production code, because it means the person running your program doesn't need to have Go installed.

However, for development, you can use go run . to compile and run your program in one step.