private string TryGetTargetPath(string linkPath)
{
var targetPath = SymbolicLinkWithDiagnostics.Resolve(linkPath);
return(targetPath != linkPath ? targetPath : null);
}
public int Execute(NuLinkCommandOptions options)
{
_ui.ReportMedium(() =>
$"Searching package reference in {(options.ProjectIsSolution ? "solution" : "project")}: {options.ConsumerProjectPath}");
var requestedPackage = GetPackageInfo();
var status = requestedPackage.CheckStatus();
var linkTargetPath = options.LocalProjectOutputPath;
ValidateOperation();
PerformOperation();
_ui.ReportSuccess(() => $"Linked {requestedPackage.LibFolderPath}");
_ui.ReportSuccess(() => $" -> {linkTargetPath}", ConsoleColor.Magenta);
return(0);
PackageReferenceInfo GetPackageInfo()
{
var allProjects = new WorkspaceLoader().LoadProjects(options.ConsumerProjectPath, options.ProjectIsSolution);
var referenceLoader = new PackageReferenceLoader(_ui);
var package = referenceLoader.LoadPackageReference(allProjects, options.PackageId);
return(package ?? throw new Exception($"Error: Package not referenced: {options.PackageId}"));
}
void ValidateOperation()
{
if (!status.LibFolderExists)
{
throw new Exception($"Error: Cannot link package {options.PackageId}: 'lib' folder not found, expected {requestedPackage.LibFolderPath}");
}
if (status.IsLibFolderLinked)
{
throw new Exception($"Error: Package {requestedPackage.PackageId} is already linked to {status.LibFolderLinkTargetPath}");
}
if (!Directory.Exists(linkTargetPath))
{
throw new Exception($"Error: Target link directory doesn't exist: {linkTargetPath}");
}
}
void PerformOperation()
{
if (!status.LibBackupFolderExists)
{
Directory.Move(requestedPackage.LibFolderPath, requestedPackage.LibBackupFolderPath);
}
else
{
_ui.ReportWarning(() => $"Warning: backup folder was not expected to exist: {requestedPackage.LibBackupFolderPath}");
}
try
{
SymbolicLinkWithDiagnostics.Create(
fromPath: requestedPackage.LibFolderPath,
toPath: linkTargetPath);
}
catch
{
RevertOperation();
throw;
}
}
void RevertOperation()
{
try
{
_ui.ReportError(() => "Failed to create symlink, reverting changes to package folders.");
Directory.Move(requestedPackage.LibBackupFolderPath, requestedPackage.LibFolderPath);
}
catch (Exception e)
{
_ui.ReportError(() => $"FAILED to revert package changes: {e.Message}");
_ui.ReportError(() => $"You have to recover manually!");
_ui.ReportError(() => "--- MANUAL RECOVERY INSTRUCTIONS ---");
_ui.ReportError(() => $"1. Go to {Path.GetDirectoryName(requestedPackage.LibFolderPath)}");
_ui.ReportError(() => $"2. Rename '{Path.GetFileName(requestedPackage.LibBackupFolderPath)}'" +
$" to '{Path.GetFileName(requestedPackage.LibFolderPath)}'");
_ui.ReportError(() => "--- END OF RECOVERY INSTRUCTIONS ---");
}
}
}