package main

import (
	"fmt"
	"os"

	"gopkg.in/src-d/go-git.v4"
	. "gopkg.in/src-d/go-git.v4/_examples"
)

// Open an existing repository in a specific folder.
func main() {
	CheckArgs("<path>")
	path := os.Args[1]

	// We instance a new repository targeting the given path (the .git folder)
	r, err := git.PlainOpen(path)
	CheckIfError(err)

	// Length of the HEAD history
	Info("git rev-list HEAD --count")

	// ... retrieving the HEAD reference
	ref, err := r.Head()
	CheckIfError(err)

	// ... retrieving the commit object
	commit, err := r.Commit(ref.Hash())
	CheckIfError(err)

	// ... calculating the commit history
	commits, err := commit.History()
	CheckIfError(err)

	fmt.Println(len(commits))
}