/// <summary>
/// Attempts to start the newest version of the executable named the same thing as the executing assembly
/// </summary>
/// <param name="versionedDirectories"></param>
/// <param name="versionStarted"></param>
/// <returns></returns>
private bool StartNewestVersion(
Assembly executable,
VersionedDirectory[] versionedDirectories,
out VersionedDirectory versionStarted,
IProgressViewer progressViewer)
{
versionStarted = null;
try
{
// get the name of this assembly which will be what we look for to start
string assemblyName = string.Format("{0}.exe", executable.GetName().Name);
// will start with the newest version because they are sorted
foreach (VersionedDirectory versionToStart in versionedDirectories)
{
// format the path to the version we are going to attempt to start
string path = Path.Combine(versionToStart.Directory.FullName, assemblyName);
bool started = false;
// if the file exists
if (File.Exists(path))
{
ProgressViewer.SetExtendedDescription(progressViewer, "Bootstrap: Starting version " + versionToStart.Version.ToString() + "...");
Process p = new Process();
p.StartInfo.FileName = path;
p.StartInfo.Arguments = System.Environment.CommandLine;
p.StartInfo.WorkingDirectory = versionToStart.Directory.FullName;
p.StartInfo.WindowStyle = Process.GetCurrentProcess().StartInfo.WindowStyle;
// try to start this version
started = p.Start();
}
// if a version was started
if (started)
{
// keep track of which version we started
versionStarted = versionToStart;
return(true);
}
}
}
catch (System.Exception systemException)
{
System.Diagnostics.Trace.WriteLine(systemException);
}
return(false);
}
private bool DeleteOlderVersions(
VersionedDirectory[] versionedDirectories,
VersionedDirectory versionStarted,
IProgressViewer progressViewer)
{
try
{
// grab the newest version
VersionedDirectory newestVersion = versionedDirectories[0];
// loop thru and delete the oldest versions not in use
foreach (VersionedDirectory version in versionedDirectories)
{
// keep the newest version and the one that started
if (version != newestVersion && version != versionStarted)
{
try
{
ProgressViewer.SetExtendedDescription(progressViewer, "Bootstrap: Removing older version " + version.Version.ToString() + "...");
// recursively delete this version directory
Directory.Delete(version.Directory.FullName, true);
}
catch (System.Exception systemException)
{
System.Diagnostics.Trace.WriteLine(systemException);
}
}
}
}
catch (System.Exception systemException)
{
System.Diagnostics.Trace.WriteLine(systemException);
}
return(false);
}
public void Run(string[] args, System.Reflection.Assembly executable)
{
bool tracedExceptionThrown = false;
try
{
using (SplashWindowThread splashThread = new SplashWindowThread(executable, false))
{
splashThread.ShowAsynchronously();
splashThread.Window.SetMarqueeMoving(true, true);
ProgressViewer.SetExtendedDescription(splashThread.Window, "Bootstrap: Parsing command line...");
// create a new command line parsing engine
CommandLineParsingEngine pe = new CommandLineParsingEngine(args);
// determine if we are going to keep the old versions
bool keepOld = pe.ToBoolean("keepold");
// the process id of an app
int pid = pe.ToInt32("pid");
// whether we should wait on the specified pid to die before launching new version
bool wait = pe.ToBoolean("wait");
ProgressViewer.SetExtendedDescription(splashThread.Window, "Bootstrap: Searching for runnable version...");
// create a search for all of the subdirectories
Search search = new Search("Versions", Application.StartupPath, "*", false, false);
// find all of the directories
DirectoryInfo[] directories = search.GetDirectories();
// create versioned files around each directory that can be parsed to a version
VersionedDirectory[] versionedDirectories = this.CreateVersionedFiles(directories);
// if we have been instructed to wait on the process specified by pid to die, do it now
if (wait && pid != 0)
{
try
{
// snag it and wait on it to exit
Process p = Process.GetProcessById(pid);
if (p != null)
{
ProgressViewer.SetExtendedDescription(splashThread.Window, "Bootstrap: Closing previous instance...");
p.WaitForExit();
}
}
catch (System.Exception systemException)
{
System.Diagnostics.Trace.WriteLine(systemException);
}
}
ProgressViewer.SetExtendedDescription(splashThread.Window, "Bootstrap: Selecting latest runnable version...");
// try and start the newest version
VersionedDirectory versionStarted;
bool startedVersion = this.StartNewestVersion(executable, versionedDirectories, out versionStarted, splashThread.Window);
// this will fall back upon older versions until it runs out of versions or one of the versions starts
if (!startedVersion)
{
string exeName = string.Format("{0}.exe", executable.GetName().Name);
ExceptionEngine.DisplayException(null, "BootStrap failed for " + exeName, MessageBoxIcon.Stop, MessageBoxButtons.OK, null,
"No suitable executable was found or able to be started.");
}
// if we're not keeping the old versions
if (!keepOld)
{
// delete the older versions
if (!this.DeleteOlderVersions(versionedDirectories, versionStarted, splashThread.Window))
{
// um, who cares if we can't delete the older versions
// also we need to see about security rights to the directories
}
}
// if we started a version
if (startedVersion)
{
// notify that we are transferring control now to it...
ProgressViewer.SetExtendedDescription(splashThread.Window, "Bootstrap: Transferring control to version " + versionStarted.Version.ToString() + "...");
}
}
}
catch (System.Exception systemException)
{
tracedExceptionThrown = true;
System.Diagnostics.Trace.WriteLine(systemException);
System.Windows.Forms.MessageBox.Show(null, systemException.ToString(), "Application Exiting");
Application.ExitThread();
}
finally
{
System.Diagnostics.Trace.WriteLine("'" + Application.ProductName + (tracedExceptionThrown ? "' has terminated because of an exception." : "' has exited gracefully."));
}
}
