Go Notes

go and git are tightly coupled ...
using gh cli to create repo: gh repo create
use Apache License 2.0.
go was developed for the biggest tech enteprises in history
go is the standard for cloud native computing.
most cloud native tools are written in go (Kubernetes, helm, ...)
helm templating is created with go templating, same with hugo for static html creation.
check (github.com/rwxrob/awesome-go)

How to install Go

Install however but make sure it is 1.21+, most package managers are way behind on the version.

go mod init github.com/nieldejonghe/ga
go mod tidy
am I writing a package? or am I writing a command? you either are writing a command, this is when you have a main function or you have a module/package. In this case we will start with a command.
touch main.go (when it's a package use the name of the package, or lib.go)
now it's time to start coding!!

Every single file that ends in .go must have a package name. This is mandatory by the compiler.
package main is only used by things that turn into executable commands.
In go you can't use single quotes, these are only for runes, a rune is a data type that stores code that represent unicode characters.
make sure to import packages when you are using them, go will not compile when there is stuff that is unused (variables, packages,...)
you can run go without compiling when using go run main.go
go build this will create a binary that matches the name of the parent directory.
you can also use go build -o <name>
now you can run the program with ./go in our case
hyperfine is a good benchmark tool, for example to compare go vs shell script.
go env shows you all the go environment vars
go install will install it in your gobin directory.
most of the time you should be making a package which a command uses.
you can EXPORT a package by using an uppercase. (Every single function should be exported? how to hide them?)