public void ApplyPatch(Patch patch)
{
lock (fileSystemSync) {
if (Version != patch.FromVersion) {
throw new ArgumentException(string.Format("Cannot upgrade from version '{0}' using patch for version '{1}'", Version, patch.FromVersion));
}
IsModified = true;
foreach (var instruction in patch.Instructions) {
instruction.Apply(patch.PatchDataRoot, ApplicationRoot);
}
WriteVersion(patch.ToVersion);
Version = patch.ToVersion;
}
}
private static Patch InitializeFrom(string patchDataRoot)
{
var config = new XmlDocument();
config.Load(Path.Combine(patchDataRoot, "nocap.xml"));
var patch = new Patch(patchDataRoot);
ParsePatchConfig(patch, config);
return patch;
}
private static void ParsePatchConfig(Patch patch, XmlDocument config)
{
var configRoot = config.DocumentElement;
patch.Instructions = new ReadOnlyCollection<IPatchInstruction>(
configRoot.SelectNodes("Instructions/*").OfType<XmlElement>().Select(ParseInstruction).ToArray()
);
patch.FromVersion = configRoot.SelectSingleNode("From").InnerText;
patch.ToVersion = configRoot.SelectSingleNode("To").InnerText;
}