/// <summary>
/// Changes an existing link target to a new path.
/// </summary>
/// <param name="linkPath"> The link path. </param>
/// <param name="newActualPath"> The new actual path. </param>
/// <remarks>
/// </remarks>
public void ChangeLinkTarget(string linkPath, string newActualPath)
{
linkPath = linkPath.GetFullPath();
newActualPath = GetActualPath(newActualPath.GetFullPath());
var oldActualPath = GetActualPath(linkPath);
if (oldActualPath.Equals(newActualPath, StringComparison.CurrentCultureIgnoreCase))
{
return;
}
if (!IsSymlink(linkPath))
{
throw new PathIsNotSymlinkException(linkPath);
}
if (Directory.Exists(linkPath))
{
ReparsePoint.ChangeReparsePointTarget(linkPath, newActualPath);
}
else if (File.Exists(linkPath))
{
DeleteSymlink(linkPath);
MakeFileLink(linkPath, newActualPath);
}
else
{
throw new DirectoryNotFoundException("Target directory not found");
}
}
public bool IsSymlink(string linkPath)
{
if (!ReparsePoint.IsReparsePoint(linkPath))
{
return(false);
}
var reparsePoint = ReparsePoint.Open(linkPath);
return(reparsePoint.IsSymlinkOrJunction);
}
public void ChangeLinkTarget(string linkPath, string newActualPath)
{
linkPath = linkPath.GetFullPath();
newActualPath = GetActualPath(newActualPath.GetFullPath());
if (!IsSymlink(linkPath))
{
throw new PathIsNotSymlinkException(linkPath);
}
ReparsePoint.ChangeReparsePointTarget(linkPath, newActualPath);
}
/// <summary>
/// Gets the actual path.
/// </summary>
/// <param name="linkPath"> The link path. </param>
/// <returns> </returns>
/// <remarks>
/// </remarks>
public string GetActualPath(string linkPath)
{
linkPath = linkPath.GetFullPath();
if (File.Exists(linkPath))
{
string result;
GetAlternateStreamData(linkPath, out result);
return(result);
}
if (Directory.Exists(linkPath))
{
return(ReparsePoint.GetActualPath(linkPath));
}
return(linkPath);
}
/// <summary>
/// Determines whether the specified link path is symlink.
/// </summary>
/// <param name="linkPath"> The link path. </param>
/// <returns> <c>true</c> if the specified link path is symlink; otherwise, <c>false</c> . </returns>
/// <remarks>
/// </remarks>
public bool IsSymlink(string linkPath)
{
linkPath = linkPath.GetFullPath();
if (File.Exists(linkPath))
{
if (GetFileInfo(linkPath).NumberOfLinks > 1)
{
string canonicalFilePath;
var alternates = GetAlternateStreamData(linkPath, out canonicalFilePath);
var result = !linkPath.Equals(canonicalFilePath, StringComparison.CurrentCultureIgnoreCase);
try {
if (result && !alternates.Contains(linkPath))
{
AddSymlinkToAlternateStream(canonicalFilePath, linkPath);
}
} catch {
// just trying to clean-as-we-go
}
return(result);
}
try {
var s = new FileInfo(linkPath).GetAlternateDataStream(legacySymlinkInfo);
if (s.Exists)
{
s.Delete();
}
} catch {
// just try to clean as we go...
}
return(false);
}
if (Directory.Exists(linkPath))
{
return(ReparsePoint.IsReparsePoint(linkPath));
}
throw new FileNotFoundException("Link does not exist");
}
/// <summary>
/// Creates a symlink for a directory. If it already exists, it is updated.
/// </summary>
/// <param name="linkPath"> The link path. </param>
/// <param name="actualFolderPath"> The actual folder path. </param>
/// <remarks>
/// </remarks>
public void MakeDirectoryLink(string linkPath, string actualFolderPath)
{
linkPath = linkPath.GetFullPath();
actualFolderPath = GetActualPath(actualFolderPath.GetFullPath());
if (!Directory.Exists(actualFolderPath))
{
throw new FileNotFoundException("Cannot link to non-existent directory", actualFolderPath);
}
if (Directory.Exists(linkPath) && IsSymlink(linkPath))
{
ReparsePoint.ChangeReparsePointTarget(linkPath, actualFolderPath);
return;
}
if (File.Exists(linkPath) || Directory.Exists(linkPath))
{
throw new ConflictingFileOrFolderException(linkPath);
}
ReparsePoint.CreateJunction(linkPath, actualFolderPath);
}
public string GetActualPath(string linkPath)
{
linkPath = linkPath.GetFullPath();
return(ReparsePoint.GetActualPath(linkPath));
}
