go-erofs

A Go library for opening erofs files as a Go stdlib fs.FS.

Scope

This library is designed to allow erofs files to be usable in any Go operation that uses the standard filesystem interface. This could be useful for accessing an erofs file just as you would a plain directory without needing to unpack. In the future this library could provide an interface to create erofs files as well.

Current state

• Read erofs files created with default mkfs.erofs options
• Read chunk-based erofs files (without indexes)
• Xattr support
• Long xattr prefix support
• Read erofs files with compression
• Extra devices for chunked data and chunk indexes
• Creating erofs files
• Tar to erofs conversion

Example use

Print out all the files in an erofs file

package main

import (
	"fmt"
	"io/fs"
	"log"
	"os"

	"github.com/erofs/go-erofs"
)

func main() {
	f, err := os.Open("testdata/basic-default.erofs")
	if err != nil {
		log.Fatal(err)
	}
	defer f.Close()

	img, err := erofs.EroFS(f)
	if err != nil {
		log.Fatal(err)
	}

	fs.WalkDir(img, "/", func(path string, entry fs.DirEntry, err error) error {
		fmt.Println(path)
		return nil
	})
}