public static PatchingEnvironment FromExisting(string path)
{
var patchingEnvironment = new PatchingEnvironment(path);
patchingEnvironment.Version = patchingEnvironment.ReadVersion() ?? DefaultVersion;
return patchingEnvironment;
}
public static PatchingEnvironment Create(PatchingEnvironment baseEnvironment)
{
string newApplicationRoot = FileSystem.GetTempDirectory();
Computer.FileSystem.CopyDirectory(baseEnvironment.ApplicationRoot, newApplicationRoot);
return FromExisting(newApplicationRoot);
}
private void CreateNewPatchingEnvironment()
{
this.patchingEnvironment = PatchingEnvironment.Create(PatchingEnvironment.GetCurrent());
}
public void ReplaceWith(PatchingEnvironment other)
{
// TODO Sanity checks, etc.
string source = other.ApplicationRoot;
string destination = ApplicationRoot;
// Rename the destination,
// move source to (old) destination,
// delete renamed destination
string tempRoot = Path.Combine(Path.GetDirectoryName(destination), string.Format("NoCap-{0}", Path.GetRandomFileName()));
bool success;
success = false;
try {
MoveDirectory(destination, tempRoot);
success = true;
} finally {
if (!success) {
if (Directory.Exists(tempRoot)) {
MoveDirectory(tempRoot, destination);
}
}
}
success = false;
try {
MoveDirectory(source, destination);
success = true;
} finally {
if (!success) {
if (Directory.Exists(destination)) {
Directory.Delete(destination, true);
}
MoveDirectory(tempRoot, destination);
}
}
Directory.Delete(tempRoot, true);
}