use go-git & memfs to push files to remote

go-git.go

package main

import (
	"fmt"

	billy "github.com/go-git/go-billy/v5"
	memfs "github.com/go-git/go-billy/v5/memfs"
	git "github.com/go-git/go-git/v5"
	config "github.com/go-git/go-git/v5/config"
	http "github.com/go-git/go-git/v5/plumbing/transport/http"
	memory "github.com/go-git/go-git/v5/storage/memory"
)

var storer *memory.Storage
var fs billy.Filesystem

func main() {
	storer = memory.NewStorage()
	fs = memfs.New()

	// Authentication
	auth := &http.BasicAuth{
		Username: "abc123",
		Password: "abc123",
	}

	r, err := git.Init(storer, fs)
	if err != nil {
		fmt.Printf("error: %v", err)
		return
	}
	_, err = r.CreateRemote(&config.RemoteConfig{
		Name: "origin",
		URLs: []string{"https://gitlab.com/rogerwelin/go-git-example.git"},
	})

	w, err := r.Worktree()
	if err != nil {
		fmt.Printf("%v", err)
		return
	}

	// Create new file
	filePath := "roger.txt"
	newFile, err := fs.Create(filePath)
	if err != nil {
		return
	}
	newFile.Write([]byte("My new file"))
	newFile.Close()

	// Run git status before adding the file to the worktree
	fmt.Println(w.Status())

	// git add $filePath
	w.Add(filePath)
	// Run git status after the file has been added adding to the worktree
	fmt.Println(w.Status())

	// git commit -m $message
	w.Commit("Added my new file", &git.CommitOptions{})

	//Push the code to the remote
	err = r.Push(&git.PushOptions{
		RemoteName: "origin",
		Auth:       auth,
	})
	if err != nil {
		return
	}
	fmt.Println("Remote updated.", filePath)

}