public bool InitializeAdminBuildpack(StagingStartRequestAdminBuildpack adminBuildpack, string adminBuildpackDir, bool checkWindowsCompatibility)
{
var dir = Path.Combine(adminBuildpackDir, adminBuildpack.Key);
var buildpackMutex = new Mutex(false, AdminBuildpackMutexName(adminBuildpack.Key));
try
{
buildpackMutex.WaitOne();
DownloadAdminBuildpack(adminBuildpack, adminBuildpackDir);
if (checkWindowsCompatibility)
{
var winBuildpack = BuildpackHasWindowsCompatibleBinaries(dir);
if (!winBuildpack)
{
Logger.Info("Ignoring buildpack {1}. Staging task {0}. Unable to detect compatible windows executables in buildpack bin.", this.Properties.TaskId, dir);
return false;
}
}
DEAUtilities.DirectoryCopy(dir, Path.Combine(this.Workspace.TempDir, "buildpack"), true);
}
finally
{
buildpackMutex.ReleaseMutex();
buildpackMutex.Dispose();
}
return true;
}
private void TryCleanupUnusedAdminBuildpacks(StagingStartRequestAdminBuildpack[] adminBuildpacks, string adminBuildpackDir)
{
if (!Directory.Exists(adminBuildpackDir))
{
return;
}
var cachedAdminBuilpacks = new DirectoryInfo(adminBuildpackDir).EnumerateDirectories().ToDictionary(di => di.Name, di => di.FullName);
var adminBuildpacksLookup = adminBuildpacks.ToLookup(ab => ab.Key);
foreach (var cachedBuildpack in cachedAdminBuilpacks)
{
if (adminBuildpacksLookup.Contains(cachedBuildpack.Key))
{
continue;
}
bool signaled = false;
var buildpackMutex = new Mutex(false, AdminBuildpackMutexName(cachedBuildpack.Key));
try
{
signaled = buildpackMutex.WaitOne(0);
if (signaled)
{
Logger.Info("Deleting old admin buildpack {0} from {1}", cachedBuildpack.Key, cachedBuildpack.Value);
Directory.Delete(cachedBuildpack.Value, true);
}
}
finally
{
if (signaled)
{
buildpackMutex.ReleaseMutex();
}
buildpackMutex.Dispose();
}
}
}
public void DownloadAdminBuildpack(StagingStartRequestAdminBuildpack adminBuildpack, string adminBuildpackDir)
{
string archiveFile = Path.Combine(adminBuildpackDir, adminBuildpack.Key + ".zip");
string destDir = Path.Combine(adminBuildpackDir, adminBuildpack.Key);
if (Directory.Exists(destDir))
{
Logger.Info("Skipping download for admin buildpack {0} because it was previously downloaded in {1}", adminBuildpack.Key, destDir);
return;
}
Directory.CreateDirectory(destDir);
WebClient client = new WebClient();
try
{
Logger.Info("Downloading admin buildpack {0} in {1} from {2}", adminBuildpack.Key, destDir, adminBuildpack.Url);
var downloadUri = new Uri(adminBuildpack.Url);
client.Headers[HttpRequestHeader.Authorization] = "Basic " + System.Convert.ToBase64String(System.Text.Encoding.UTF8.GetBytes(downloadUri.UserInfo));
client.DownloadFile(downloadUri, archiveFile);
ZipFile.ExtractToDirectory(archiveFile, destDir);
}
catch
{
Directory.Delete(destDir, true);
File.Delete(archiveFile);
throw;
}
finally
{
client.Dispose();
}
File.Delete(archiveFile);
}
