Go embed * go by default exclude .go file during go build

 https://stackoverflow.com/questions/56608186/does-go-build-include-non-go-files-in-binary

Does go build includes non go files in binary?

By default, no: you need to embed them.

GO:EMBED:

When using go:embed to embed files or directories in a Go application, the path to access the embedded content within the embed.FS will be relative to the directory containing the source file where the //go:embed directive is declared.

Here's how the path is determined:

• Relative to the package directory:

  The patterns specified in the //go:embed directive are interpreted as paths relative to the directory of the Go source file containing the directive.
• Embedded structure:

  If you embed a directory, the files within that directory and its subdirectories will maintain their relative path structure within the embed.FS.
• Accessing files:

  When you later access these embedded files using methods like embed.FS.ReadFile() or embed.FS.Open(), you will use paths that reflect this embedded structure.

Example:

Consider a file main.go in the root of your project, and a static directory with a css subdirectory containing style.css:

myproject/

├── main.go

└── static/

    └── css/

        └── style.css

main.go

package main

import (

"embed"

)

//go:embed static/*

var staticFS embed.FS

func main() {

// To access style.css, the path will be "static/css/style.css"

// relative to the embedded root.

content, err := staticFS.ReadFile("static/css/style.css")

if err != nil {

// Handle error

}

// Use content

}