The simple and easy way to embed static files into Go binaries.

Packr is a simple solution for bundling static assets inside of Go binaries.

Installation

go get -u github.com/gobuffalo/packr

Usage

// set up a new box by giving it a (relative) path to a folder on disk:
box := packr.NewBox("./templates")

// Get the string representation of a file, or an error if it doesn't exist:
html, err := box.FindString("index.html")

// Get the []byte representation of a file, or an error if it doesn't exist:
html, err := box.FindBytes("index.html")

A box represents a folder, and any sub-folders, on disk that you want to have access to in your binary. When compiling a binary using the packr CLI the contents of the folder will be converted into Go files that can be compiled inside of a „standard“ go binary. Inside of the compiled binary the files will be read from memory. When working locally the files will be read directly off of disk.

Usage with HTTP

package main

import (
  "net/http"

  "github.com/gobuffalo/packr"
)

func main() {
  box := packr.NewBox("./templates")

  http.Handle("/", http.FileServer(box))
  http.ListenAndServe(":3000", nil)
}

Building a Binary

packr
go build