New repository struct

codereview-gitcommit-newRepo

// Repository is a struct that holds an Opened github repository and the reference
type Repository struct {
	path string
	repo *git.Repository
	ref  *plumbing.Reference
}

// Open will open up a git repository
// and load the Head reference
func Open(path string) (*Repository, error) {
	// Open the github repository
	r, err := git.PlainOpen(path)
	if err != nil {
		return nil, fmt.Errorf("%v:%w", "Error opening Repository: ", err)
	}

	// Grab the Git HEAD reference
	ref, err := r.Head()
	if err != nil {
		return nil, fmt.Errorf("%v:%w", "Unable to get repository HEAD:", err)
	}
	return &Repository{
		path: path,
		repo: r,
		ref:  ref,
	}, nil
}

// GetCommits will extract commit history from the git repository
func (r *Repository) GetCommits() ([]*object.Commit, error) {
	// Get the Commit history
	cIter, err := r.repo.Log(&git.LogOptions{From: r.ref.Hash()})

	if err != nil {
		return nil, fmt.Errorf("%v:%w", "Unable to get repository commits:", err)
	}

	var commits []*object.Commit

	err = cIter.ForEach(func(c *object.Commit) error {
		commits = append(commits, c)
		return nil
	})

	if err != nil {
		return nil, fmt.Errorf("%v:%w", "Error getting commits :", err)
	}
	return commits, nil
}