/// <inheritdoc/>
public string GetIcon(Uri iconUrl, ITaskHandler handler)
{
#region Sanity checks
if (iconUrl == null) throw new ArgumentNullException(nameof(iconUrl));
if (handler == null) throw new ArgumentNullException(nameof(handler));
#endregion
string path = Path.Combine(DirectoryPath, new FeedUri(iconUrl).Escape());
// Prevent file-exists race conditions
lock (_lock)
{
// Download missing icons
if (!File.Exists(path))
{
using (var atomic = new AtomicWrite(path))
{
handler.RunTask(new DownloadFile(iconUrl, atomic.WritePath));
atomic.Commit();
}
}
}
return path;
}
/// <summary>
/// Sets the list of catalog sources in a configuration file.
/// </summary>
/// <param name="uris">The list of catalog sources to use from now on.</param>
/// <exception cref="IOException">There was a problem writing a configuration file.</exception>
/// <exception cref="UnauthorizedAccessException">Access to a configuration file was not permitted.</exception>
public static void SetSources([NotNull, ItemNotNull, InstantHandle] IEnumerable<FeedUri> uris)
{
#region Sanity checks
if (uris == null) throw new ArgumentNullException("uris");
#endregion
using (var atomic = new AtomicWrite(Locations.GetSaveConfigPath("0install.net", true, "catalog-sources")))
{
using (var configFile = new StreamWriter(atomic.WritePath, append: false, encoding: FeedUtils.Encoding) {NewLine = "\n"})
{
foreach (var uri in uris)
configFile.WriteLine(uri.ToStringRfc());
}
atomic.Commit();
}
}
/// <summary>
/// Saves the settings to an INI file.
/// </summary>
/// <remarks>This method performs an atomic write operation when possible.</remarks>
/// <exception cref="IOException">A problem occurs while writing the file.</exception>
/// <exception cref="UnauthorizedAccessException">Write access to the file is not permitted.</exception>
public void Save([NotNull] string path)
{
TransferToIni();
Log.Debug("Saving Config to: " + path);
using (var atomic = new AtomicWrite(path))
using (var writer = new StreamWriter(atomic.WritePath, append: false, encoding: FeedUtils.Encoding))
{
new StreamIniDataParser().WriteData(writer, _iniData);
atomic.Commit();
}
}
/// <summary>
/// Adds a directory prefix to all entries in an external flag file.
/// </summary>
/// <param name="path">The full path to the flag file, named <see cref="FlagUtils.XbitFile"/> or <see cref="FlagUtils.SymlinkFile"/>.</param>
/// <param name="source">The old path of the renamed file or directory relative to <paramref name="path"/>.</param>
/// <param name="destination">The new path of the renamed file or directory relative to <paramref name="path"/>.</param>
/// <exception cref="ArgumentException"><paramref name="source"/> or <paramref name="destination"/> is not a relative path.</exception>
/// <exception cref="IOException">There was an error writing the flag file.</exception>
/// <exception cref="UnauthorizedAccessException">You have insufficient rights to write the flag file.</exception>
public static void Rename([NotNull] string path, [NotNull] string source, [NotNull] string destination)
{
#region Sanity checks
if (string.IsNullOrEmpty(path)) throw new ArgumentNullException("path");
if (string.IsNullOrEmpty(source)) throw new ArgumentNullException("source");
if (Path.IsPathRooted(source)) throw new ArgumentException(Resources.PathNotRelative, "source");
if (string.IsNullOrEmpty(destination)) throw new ArgumentNullException("destination");
if (Path.IsPathRooted(destination)) throw new ArgumentException(Resources.PathNotRelative, "destination");
#endregion
if (!File.Exists(path)) return;
// Convert paths to rooted Unix-style
source = "/" + source.Replace(Path.DirectorySeparatorChar, '/');
destination = "/" + destination.Replace(Path.DirectorySeparatorChar, '/');
using (var atomic = new AtomicWrite(path))
using (var newFlagFile = new StreamWriter(atomic.WritePath, append: false, encoding: FeedUtils.Encoding) {NewLine = "\n"})
using (var oldFlagFile = File.OpenText(path))
{
// Each line in the file signals a flagged file
while (!oldFlagFile.EndOfStream)
{
string line = oldFlagFile.ReadLine();
if (line != null && line.StartsWith("/"))
{
if (line == source || line.StartsWith(source + "/"))
newFlagFile.WriteLine(destination + line.Substring(source.Length));
else newFlagFile.WriteLine(line);
}
}
atomic.Commit();
}
}
/// <summary>
/// Removes one or more flags for a file or directory in an external flag file.
/// </summary>
/// <param name="path">The full path to the flag file, named <see cref="FlagUtils.XbitFile"/> or <see cref="FlagUtils.SymlinkFile"/>.</param>
/// <param name="relativePath">The path of the file or directory to remove relative to <paramref name="path"/>.</param>
/// <exception cref="ArgumentException"><paramref name="relativePath"/> is not a relative path.</exception>
/// <exception cref="IOException">There was an error writing the flag file.</exception>
/// <exception cref="UnauthorizedAccessException">You have insufficient rights to write the flag file.</exception>
public static void Remove([NotNull] string path, [NotNull] string relativePath)
{
#region Sanity checks
if (string.IsNullOrEmpty(path)) throw new ArgumentNullException("path");
if (string.IsNullOrEmpty(relativePath)) throw new ArgumentNullException("relativePath");
if (Path.IsPathRooted(relativePath)) throw new ArgumentException(Resources.PathNotRelative, "relativePath");
#endregion
if (!File.Exists(path)) return;
// Convert path to rooted Unix-style
string unixPath = "/" + relativePath.Replace(Path.DirectorySeparatorChar, '/');
using (var atomic = new AtomicWrite(path))
using (var newFlagFile = new StreamWriter(atomic.WritePath, append: false, encoding: FeedUtils.Encoding) {NewLine = "\n"})
using (var oldFlagFile = File.OpenText(path))
{
// Each line in the file signals a flagged file
while (!oldFlagFile.EndOfStream)
{
string line = oldFlagFile.ReadLine();
if (line != null && line.StartsWith("/"))
{
if (line == unixPath || line.StartsWith(unixPath + "/")) continue; // Filter out removed files
newFlagFile.WriteLine(line);
}
}
atomic.Commit();
}
}
/// <summary>
/// Sets the list of implementation directory paths in the current user configuration.
/// </summary>
/// <param name="paths">The list of implementation directory paths to set.</param>
/// <exception cref="IOException">There was a problem writing a configuration file.</exception>
/// <exception cref="UnauthorizedAccessException">Access to a configuration file was not permitted.</exception>
public static void SetUserCustomImplementationDirs([NotNull, ItemNotNull, InstantHandle] IEnumerable<string> paths)
{
#region Sanity checks
if (paths == null) throw new ArgumentNullException("paths");
#endregion
using (var atomic = new AtomicWrite(Locations.GetSaveConfigPath("0install.net", true, "injector", "implementation-dirs")))
{
using (var configFile = new StreamWriter(atomic.WritePath, append: false, encoding: FeedUtils.Encoding) {NewLine = "\n"})
{
foreach (var path in paths)
configFile.WriteLine(path);
}
atomic.Commit();
}
}
/// <summary>
/// Sets the list of implementation directories in a specific configuration file.
/// </summary>
/// <param name="configPath">The path of the configuration file to write.</param>
/// <param name="paths">The list of implementation directories to set.</param>
/// <exception cref="IOException">There was a problem writing <paramref name="configPath"/>.</exception>
/// <exception cref="UnauthorizedAccessException">Access to <paramref name="configPath"/> was not permitted.</exception>
private static void SetImplementationDirs([NotNull] string configPath, [NotNull, ItemNotNull, InstantHandle] IEnumerable<string> paths)
{
#region Sanity checks
if (string.IsNullOrEmpty(configPath)) throw new ArgumentNullException(nameof(configPath));
if (paths == null) throw new ArgumentNullException(nameof(paths));
#endregion
using (var atomic = new AtomicWrite(configPath))
{
using (var configFile = new StreamWriter(atomic.WritePath, append: false, encoding: FeedUtils.Encoding) {NewLine = "\n"})
{
foreach (var path in paths)
configFile.WriteLine(path);
}
atomic.Commit();
}
}
/// <summary>
/// Writes the entire content of a byte array to file atomically.
/// </summary>
/// <param name="data">The data to write.</param>
/// <param name="path">The file to write to.</param>
private void WriteToFile(byte[] data, string path)
{
lock (_replaceLock)
using (var atomic = new AtomicWrite(path))
{
File.WriteAllBytes(atomic.WritePath, data);
atomic.Commit();
}
}
