/// <summary>
/// Triggers the installation and launches the installed app upon completion
/// </summary>
internal void PerformInstallation()
{
EventLogger.WriteInformationalMessage("Beginning Installation");
InstallationOptions options = GetInstallationOptions();
DownloadFromUriToLocalFile(options);
using (ValidateLocalFile(options.LocalInstallerFile))
{
using (Transaction transaction = new Transaction(_productName, TransactionAttributes.ChainEmbeddedUI))
{
InstallWithinTransaction(options, transaction);
}
}
UpdateConfigWithNewChannel(options.NewChannel);
LaunchPostInstallApp();
EventLogger.WriteInformationalMessage("Completed Installation");
}
/// <summary>
/// Download the installer to a computed local file
/// </summary>
/// <param name="options">The parameters to drive the install</param>
private void DownloadFromUriToLocalFile(InstallationOptions options)
{
_installerDownloadStopwatch.Reset();
using (Stream stream = new FileStream(options.LocalInstallerFile, FileMode.CreateNew))
{
_installerDownloadStopwatch.Start();
try
{
GitHubClient.LoadUriContentsIntoStream(options.MsiPath, stream, options.DownloadTimeout);
}
finally
{
_installerDownloadStopwatch.Stop();
}
} // using
EventLogger.WriteInformationalMessage("Successfully downloaded Installer from {0} to {1}",
options.MsiPath.ToString(), options.LocalInstallerFile);
}
/// <summary>
/// Triggers the installation and launches the installed app upon completion
/// </summary>
internal void PerformInstallation(Action <int> progressCallback)
{
EventLogger.WriteInformationalMessage("Beginning Installation");
progressCallback(0);
InstallationOptions options = GetInstallationOptions();
DownloadFromUriToLocalFile(options, (p) => progressCallback((p * 4) / 5));
using (ValidateLocalFile(options.LocalInstallerFile))
{
using (Transaction transaction = new Transaction(_productName, TransactionAttributes.ChainEmbeddedUI))
{
InstallWithinTransaction(options, transaction);
}
}
progressCallback(80);
UpdateConfigWithNewChannel(options.NewChannel);
progressCallback(90);
SetManifestForUIAccess(options.EnableUIAccess);
progressCallback(95);
LaunchPostInstallApp();
progressCallback(100);
EventLogger.WriteInformationalMessage("Completed Installation");
}
/// <summary>
/// Wrap the install inside a transaction
/// </summary>
/// <param name="options">The parameters to drive the installation</param>
/// <param name="transaction">The transaction to wrap the operation</param>
private void InstallWithinTransaction(InstallationOptions options, Transaction transaction)
{
Stopwatch stopwatch = Stopwatch.StartNew();
bool success = false;
try
{
RemoveOldVersion();
InstallNewVersion(options.LocalInstallerFile);
success = true;
}
finally
{
if (success)
{
transaction.Commit();
}
else
{
transaction.Rollback();
}
stopwatch.Stop();
const string messageTemplate = "VersionSwitcher {0} in {1} ms";
if (success)
{
EventLogger.WriteInformationalMessage(messageTemplate, "succeeded", stopwatch.ElapsedMilliseconds);
}
else
{
EventLogger.WriteErrorMessage(messageTemplate, "failed", stopwatch.ElapsedMilliseconds);
}
}
}
