public FileLock(Log log, params string[] filenames)
{
_locks = new LockFile[filenames.Length];
for (int i = 0; i < _locks.Length; i++)
{
Disk.CreateDirectory(log, Path.GetDirectoryName(filenames[i]));
_locks[i] = new LockFile(filenames[i] + ".lock");
}
for (int tries = 1; !TryAcquireAll(); tries++)
{
if (tries == 2000)
{
throw new TimeoutException("Failed to lock " + this + "; aborting after " + tries + " tries");
}
if (tries % 50 == 0)
{
log.Warning("Failed to lock " + this + "; retrying...");
}
// Spin wait while another process owns the file(s),
// Some randomness helps with race conditions
Thread.Sleep(Rand.Next(200, 500));
}
}
public static string GetFile(Log log, string url)
{
var dst = GetFileName(url);
// 1) Early out if the file exists locally
if (File.Exists(dst))
{
Disk.TouchFile(log, dst);
return(dst);
}
Disk.CreateDirectory(log, StuffDirectory);
try
{
// Use a set to avoid repeating errors
var errors = new HashSet <string>();
for (int tries = 0;; tries++)
{
// 2) Download the file from URL
log.WriteLine("Downloading " + url + (
tries > 0
? " (retry " + tries + "...)"
: null
), ConsoleColor.Blue);
try
{
using (var client = new StuffWebClient())
client.DownloadFile(url, dst);
return(dst);
}
catch (Exception e)
{
// Fail the 10th time, or unless WebException
if (tries >= 10 || !(e is WebException))
{
// Print previous errors, before rethrowing
foreach (var s in errors)
{
log.Error(s);
}
throw;
}
errors.Add(e.Message);
Thread.Sleep(500);
}
}
}
catch
{
Disk.DeleteFile(log, dst);
throw;
}
}
void InstallItem(KeyValuePair <string, object> item)
{
var itemKey = item.Key.Replace('/', Path.DirectorySeparatorChar);
var components = itemKey.Split(Path.DirectorySeparatorChar);
if (components.Contains(".") || components.Contains(".."))
{
throw new FormatException(item.Key + ": '.' or '..' are not valid in directory names");
}
var itemFile = Path.Combine(_parentDirectory, ".uno", "stuff", itemKey);
var targetDir = Path.Combine(_parentDirectory, itemKey);
var itemValue = item.Value?.ToString();
if (string.IsNullOrEmpty(itemValue) ||
IsItemUpToDate(Log, targetDir, itemFile, itemValue, _flags))
{
return;
}
using (new FileLock(Log, itemFile, DownloadCache.GetFileName(itemValue)))
{
if (IsItemUpToDate(Log, targetDir, itemFile, itemValue, _flags))
{
return;
}
for (int tries = 0;; tries++)
{
Log.Verbose("Extracting " + targetDir.ToRelativePath().Quote(), ConsoleColor.DarkGray);
// Support local files (e.g. from .STUFF-UPLOAD files)
var localFile = Path.Combine(_parentDirectory, itemValue);
var isLocal = File.Exists(localFile);
var file = isLocal
? localFile
: DownloadCache.GetFile(Log, itemValue);
Disk.DeleteDirectory(Log, targetDir);
Disk.CreateDirectory(Log, targetDir);
try
{
if (PlatformDetection.IsWindows)
{
LongPathZipFile.ExtractToDirectory(file, targetDir);
}
else
{
// Use system tar/unzip to preserve file permissions and links
// (ZipFile doesn't handle this)
if (Path.GetFileName(file).ToUpper().EndsWith(".TAR.GZ"))
{
Shell.Untar(Log, file, targetDir);
}
else
{
Shell.Unzip(Log, file, targetDir);
}
// Make sure files extracted are writable so we can touch them
Shell.Chmod(Log, "+w", targetDir);
Disk.TouchAllFiles(Log, targetDir);
}
Disk.CreateDirectory(Log, Path.GetDirectoryName(itemFile));
File.WriteAllText(itemFile, itemValue);
break;
}
catch (UnauthorizedAccessException)
{
// Don't try more if we get this
throw;
}
catch
{
// Delete any installed files
Disk.DeleteFile(Log, itemFile);
Disk.DeleteDirectory(Log, targetDir);
if (isLocal)
{
throw;
}
// Delete the cached download too
Disk.DeleteFile(Log, file);
// Redownload, and try just one more time to be sure
// This might fix the problem if the cached file was corrupt
if (tries > 0)
{
throw;
}
Thread.Sleep(150);
}
}
}
}
