)

// basicKeys is a set of the PAX keys for which we have built-in support.
// This does not contain "charset" or "comment", which are both PAX-specific,
// so adding them as first-class features of Header is unlikely.
// Users can use the PAXRecords field to set it themselves.
var basicKeys = map[string]bool{
	paxPath: true, paxLinkpath: true, paxSize: true, paxUid: true, paxGid: true,

	formatV7

	// FormatUSTAR represents the USTAR header format defined in POSIX.1-1988.
	//
	// While this format is compatible with most tar readers,
	// the format has several limitations making it unsuitable for some usages.
	// Most notably, it cannot support sparse files, files larger than 8GiB,
	// filenames larger than 256 characters, and non-ASCII filenames.
	//
	// Reference:

				Uname:    "vbatts",
				Gname:    "users",
				ModTime:  time.Unix(1425484303, 0),
			}, nil},
			testWrite{"Slartibartfast\n", 15, nil},

			testHeader{Header{
				Typeflag: TypeLink,
				Name:     "hard.txt",
				Linkname: "file.txt",
				Mode:     0644,
				Uid:      1000,
				Gid:      100,
				Uname:    "vbatts",
				Gname:    "users",
				ModTime:  time.Unix(1425484303, 0),
			}, nil},

		h: &Header{
			Name:     "info.txt",
			Mode:     0600,
			Size:     0,
			Uid:      1000,
			Gid:      1000,
			ModTime:  time.Unix(1360602540, 0),
			Uname:    "slartibartfast",
			Gname:    "users",
			Typeflag: TypeReg,
		},
		fm: 0600,
	}}

	for i, v := range vectors {
		fi := v.h.FileInfo()
		h2, err := FileInfoHeader(fi, "")
		if err != nil {
			t.Error(err)
			continue
		}