/// <summary>
/// Deletes a symbolic link
/// </summary>
/// <param name="linkPath">The path to the link</param>
/// <exception cref="IOException">
/// Thrown when the link can't be deleted
/// </exception>
public static void Delete(string linkPath)
{
if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
{
JunctionPoint.Delete(linkPath);
return;
}
Directory.Delete(linkPath);
}
/// <summary>
/// Determines whether the specified path exists and refers to a symbolic link.
/// </summary>
/// <param name="path">The symbolic link path</param>
/// <returns>True if the specified path represents a symbolic link</returns>
/// <exception cref="IOException">
/// Thrown if the specified path is invalid or some other error occurs
/// </exception>
public static bool Exists(string path)
{
if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
{
return(JunctionPoint.Exists(path));
}
var dirInfo = new DirectoryInfo(path);
if (!dirInfo.Exists)
{
return(false);
}
var attrs = dirInfo.Attributes;
return((attrs & FileAttributes.ReparsePoint) != 0);
}
/// <summary>
/// Creates a symbolic link from the specified directory to the specified target directory.
/// </summary>
/// <param name="linkPath">The junction point path</param>
/// <param name="targetDir">The target directory</param>
/// <param name="overwrite">If true overwrites an existing directory</param>
/// <exception cref="IOException">
/// Thrown when the link could not be created or when
/// an existing directory was found and <paramref name="overwrite" /> was false
/// </exception>
public static void Create(string linkPath, string targetDir, bool overwrite = false)
{
if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
{
JunctionPoint.Create(linkPath, targetDir, overwrite);
return;
}
targetDir = Path.GetFullPath(targetDir);
var processInfo = new ProcessStartInfo("ln", $"-s \"{targetDir}\" \"{linkPath}\"")
{
CreateNoWindow = true,
UseShellExecute = false,
// *** Redirect the output ***
RedirectStandardError = true,
RedirectStandardOutput = true
};
using (var process = Process.Start(processInfo))
{
if (process == null)
{
throw new IOException("Failed starting ln command");
}
// *** Read the streams ***
var output = new StringBuilder();
var error = new StringBuilder();
process.OutputDataReceived += (object sender, DataReceivedEventArgs e) => output.Append(e.Data);
process.BeginOutputReadLine();
process.ErrorDataReceived += (object sender, DataReceivedEventArgs e) => error.Append(e.Data);
process.BeginErrorReadLine();
process.WaitForExit();
var exitCode = process.ExitCode;
if (exitCode != 0)
{
throw new IOException($"Error creating symlink:\n{output}\n{error}");
}
}
}
