// gitRefInfo extracts a buildapi.GitRefInfo from the specified repository or returns
// an error.
func gitRefInfo(repo git.Repository, dir, ref string) (buildapi.GitRefInfo, error) {
info := buildapi.GitRefInfo{}
if repo == nil {
return info, nil
}
out, err := repo.ShowFormat(dir, ref, "%an%n%ae%n%cn%n%ce%n%B")
if err != nil {
return info, err
}
lines := strings.SplitN(out, "\n", 5)
if len(lines) != 5 {
full := make([]string, 5)
copy(full, lines)
lines = full
}
info.Author.Name = lines[0]
info.Author.Email = lines[1]
info.Committer.Name = lines[2]
info.Committer.Email = lines[3]
info.Message = lines[4]
return info, nil
}
