private void Rollback(InstallLog installLog, bool deleteChangedFiles = false)
{
log.DebugFormat("Rolling back log extension '{0}'", this.Name);
IEnumerable<InstallItem> installedItems = installLog.Items.Where(f => f.State == InstallState.Installed);
foreach (InstallItem installItem in installedItems)
{
if (!File.Exists(installItem.Path))
{
installItem.State = InstallState.UnInstalled;
continue;
}
ExtensionFile archiveFile = this.GetArchiveFile(installItem.Path);
//// CRC of the file in the current application
string currentCrc = Crc32.GetHash(installItem.Path);
//// CRC of the file at the time when it was installed
string originalCrc = installItem.CrcCode;
//// CRC of the file in the current archive
string updatedCrc = archiveFile == null ? null : archiveFile.CrcCode;
if (!deleteChangedFiles && (currentCrc != originalCrc && updatedCrc != null && currentCrc != updatedCrc))
{
log.WarnFormat("The file '{0}' has changed since it was installed, it will not be deleted", installItem.Path);
continue;
}
try
{
File.Delete(installItem.Path);
installItem.State = InstallState.UnInstalled;
}
catch (Exception ex)
{
log.Error(ex);
}
}
installLog.Result = InstallState.UnInstalled;
}
private void SaveLog(InstallLog installLog)
{
XmlDocument logDoc = new XmlDocument();
if (File.Exists(this.InstallLogFile))
logDoc.Load(this.InstallLogFile);
else
logDoc.LoadXml(string.Format("<plugin name='{0}'></plugin>", this.Name));
logDoc.DocumentElement.AppendChild(installLog.ToXml(logDoc));
logDoc.Save(this.InstallLogFile);
}
public void Install()
{
if (this.IsInstalled)
this.Uninstall();
InstallLog installLog = new InstallLog(DateTime.Now);
log.DebugFormat("Installation of extension '{0}' started", this.Name);
FileStream fs = File.OpenRead(this.ArchiveFileName);
ZipFile extensionArchive = new ZipFile(fs);
string backupDirectory = this.InstallDirectory + "." + DateTime.Now.Ticks;
try
{
foreach (ExtensionFile file in this.AssetFiles)
{
string childPath = file.Name;
string targetDir = Path.GetDirectoryName(file.InstallPath);
Directory.CreateDirectory(targetDir);
InstallItem entry = installLog.AddFile(file.InstallPath);
entry.CrcCode = Crc32.GetHash(extensionArchive.GetInputStream(file.Entry));
if (File.Exists(file.InstallPath))
{
if (Crc32.GetHash(file.InstallPath) != entry.CrcCode)
{
string backupPath = Path.Combine(backupDirectory, childPath);
log.WarnFormat("Extension {1}: file '{0}' seems modified, backing it up to '{2}'.",
file.InstallPath, this.Name, backupPath);
Directory.CreateDirectory(Path.GetDirectoryName(backupPath));
File.Copy(file.InstallPath, backupPath);
}
}
log.DebugFormat("Extracting '{0}' to '{1}'", file.Name, file.InstallPath);
file.Extract(extensionArchive, file.InstallPath);
entry.State = InstallState.Installed;
}
if (this.ConfigurationFile != null)
{
this.ConfigurationFile.Extract(extensionArchive, this.ConfigurationFile.InstallPath);
}
installLog.Result = InstallState.Installed;
}
catch (Exception ex)
{
log.Error(ex);
installLog.Error = ex;
installLog.Result = InstallState.NotInstalled;
this.Rollback(installLog);
}
finally
{
fs.Close();
extensionArchive.Close();
this.SaveLog(installLog);
}
log.DebugFormat("Installation of extension '{0}' {1}.", this.Name,
installLog.Result == InstallState.Installed ? "succeeded" : "failed");
}
