public override bool Execute()
{
if (string.IsNullOrEmpty(LinkName))
{
throw new InvalidOperationException("LinkName was not set");
}
if (string.IsNullOrEmpty(TargetName))
{
throw new InvalidOperationException("TargetName was not set");
}
var exists = SymlinkTargetType == SymlinkTargetType.Directory ? Directory.Exists(LinkName) : File.Exists(LinkName);
if (exists)
{
// if this is already a symlink, check if it points to the same target and if not then delete it
var isSymlink = (File.GetAttributes(LinkName) & FileAttributes.ReparsePoint) == FileAttributes.ReparsePoint;
if (isSymlink)
{
var querySymlinkTask = new QuerySymlink {
LinkName = LinkName, TargetName = TargetName, TargetType = TargetType, BuildEngine = BuildEngine
};
if (!querySymlinkTask.Execute())
{
return(false);
}
Log.LogMessage(MessageImportance.Low, $"{SymlinkTargetType} '{LinkName}' is a symlink which points to '{querySymlinkTask.TargetName}'");
if (string.Equals(querySymlinkTask.TargetName, TargetName.TrimEnd('\\'), StringComparison.InvariantCultureIgnoreCase))
{
// the symlink's target matches our target
return(true);
}
Log.LogMessage(MessageImportance.Normal, $"Deleting symlink '{LinkName}' because it points to a different target '{querySymlinkTask.TargetName}'");
}
else
{
Log.LogMessage(MessageImportance.Normal, $"{SymlinkTargetType} '{LinkName}' needs to be deleted before converting it to a symlink");
}
// if this is reached then delete is needed
DeleteDirectoryOrFile();
}
var createSymlinkTask = new CreateSymlink {
LinkName = LinkName, TargetName = TargetName, TargetType = TargetType, BuildEngine = BuildEngine
};
return(createSymlinkTask.Execute());
}
public override bool Execute()
{
if (string.IsNullOrEmpty(LinkName))
{
throw new InvalidOperationException("LinkName was not set");
}
if (string.IsNullOrEmpty(TargetName))
{
throw new InvalidOperationException("TargetName was not set");
}
var linkParentDirectory = Path.GetDirectoryName(LinkName.TrimEnd('\\'));
try
{
if (linkParentDirectory != null && !Directory.Exists(linkParentDirectory))
{
Directory.CreateDirectory(linkParentDirectory);
}
}
catch (Exception ex)
{
Log.LogError($"Error creating symbolic link for {LinkName} <<====>> {TargetName}. Could not create parent directory {linkParentDirectory}: {ex.Message}");
return(false);
}
var result = NativeMethods.CreateSymbolicLink(LinkName.TrimEnd('\\'), TargetName.TrimEnd('\\'), _targetType);
if (!result)
{
const uint requiredPrivilegeError = 0x80070522;
if ((uint)Marshal.GetHRForLastWin32Error() == requiredPrivilegeError)
{
Log.LogError($"Error creating symbolic link for {LinkName} <<====>> {TargetName}. Try running the build from an elevated process.");
return(false);
}
var exception = Win32Utils.GetExceptionForLastError();
Log.LogError($"Error creating symbolic link for {LinkName} <<====>> {TargetName}: {exception.Message}");
return(false);
}
Log.LogMessage(MessageImportance.High, $"Symbolic link created for {LinkName} <<====>> {TargetName}");
return(true);
}