private static void UpgradeToLatestStructureVersion(this IVault vault)
{
var pos = History.FindIndex(p => p.First == vault.GetStructureVersionToken());
if (pos == -1)
{
throw new ArgumentException(String.Format("Version '{0}' is not supported", vault.GetStructureVersionToken()));
}
if (pos == History.Count - 1)
{
return;
}
var origFilename = vault.Uri;
Func <int, String> namegen = i => origFilename + "." + vault.GetStructureVersionToken() + ".bak" + (i == 1 ? null : i.ToString());
var lastUsedIndex = 1.Seq(i => i + 1, i => File.Exists(namegen(i))).LastOrDefault();
var bakFilename = namegen(lastUsedIndex + 1);
vault.SaveAs(bakFilename);
History.Skip(pos + 1).ForEach(p => { p.Second(vault); vault.UpdateStructureVersionToken(p.First); });
(History.Last().First == Current).AssertTrue();
vault.UpdateStructureVersionToken(Current);
vault.SaveAs(origFilename);
}
public override IVault SaveAs(string uri)
{
Materialize();
_vault.SaveAs(uri);
return(this);
}
