NDepend.Path

NDepend.Path is framework to handle all sorts of paths operations: File, Directory, Absolute, Drive Letter, UNC, Relative, prefixed with an Environment Variable, that contain a Variable etc...

This framework is used in the product NDepend to handle all paths operations.

CI / CD

The project is hosted on Azure DevOps under the endjin-labs org.

Packages

The NuGet packages for the project, hosted on NuGet.org are:

• NDepend.Path

History

• Jan 30, 2014 - Initial Release from Patrick Smacchia, author of NDepend
• April 14 2015 - Werner Putschögl creates & publishes a nuget package
• June 23 2020 - endjin updates project to .NET Standard 2.1 and publishes new nuget package.

Licenses

NDepend.Path is available under the MIT open source license.

Code of conduct

This project has adopted a code of conduct adapted from the Contributor Covenant to clarify expected behavior in our community. This code of conduct has been adopted by many other projects. For more information see the Code of Conduct FAQ or contact [email protected] with any additional questions or comments.

Examples

Support for absolute file and directory path, drive letter and absolute

var absoluteFilePath = @"C:\Dir\File.txt".ToAbsoluteFilePath();

Assert.IsTrue(absoluteFilePath.FileName == "File.txt");
Assert.IsTrue(absoluteFilePath.Kind == AbsolutePathKind.DriveLetter);
Assert.IsTrue(absoluteFilePath.DriveLetter.Letter == 'C');

var absoluteUNCDirectoryPath = @"\\Server\Share\Dir".ToAbsoluteDirectoryPath();

Assert.IsTrue(absoluteUNCDirectoryPath.DirectoryName == "Dir");
Assert.IsTrue(absoluteUNCDirectoryPath.Kind == AbsolutePathKind.UNC);
Assert.IsTrue(absoluteUNCDirectoryPath.UNCServer == "Server");
Assert.IsTrue(absoluteUNCDirectoryPath.UNCShare == "Share");

Support for path browsing

Assert.IsTrue(absoluteFilePath.ParentDirectoryPath.ToString() == @"C:\Dir");
Assert.IsTrue(absoluteUNCDirectoryPath.GetChildFileWithName("File.txt").ToString() == @"\\Server\Share\Dir\File.txt");
Assert.IsTrue(absoluteUNCDirectoryPath.GetBrotherDirectoryWithName("Dir2").ToString() == @"\\Server\Share\Dir2");

if (absoluteUNCDirectoryPath.Exists) {
   var filePaths = absoluteUNCDirectoryPath.ChildrenFilesPath;
   var dirPaths = absoluteUNCDirectoryPath.ChildrenDirectoriesPath;
}

Support for relative path

var absoluteDirectoryPath = @"C:\DirA\DirB".ToAbsoluteDirectoryPath();
var relativeFilePath = @"..\DirC\File.txt".ToRelativeFilePath();
var absoluteFilePath2 = relativeFilePath.GetAbsolutePathFrom(absoluteDirectoryPath);

Assert.IsTrue(absoluteFilePath2.ToString() == @"C:\DirA\DirC\File.txt");

var relativeFilePath2 = absoluteFilePath2.GetRelativePathFrom(absoluteDirectoryPath);

Assert.IsTrue(relativeFilePath2.Equals(relativeFilePath)); // Use Equals() for path comparison, dont use ==

Support for path prefixed with an environment variable

var envVarFilePath = @"%ENVVAR%\DirB\File.txt".ToEnvVarFilePath();
Assert.IsTrue(envVarFilePath.EnvVar == "%ENVVAR%");

IAbsoluteFilePath absoluteFilePath3;
Assert.IsTrue(envVarFilePath.TryResolve(out absoluteFilePath3) == EnvVarPathResolvingStatus.ErrorUnresolvedEnvVar);

Environment.SetEnvironmentVariable("ENVVAR", @"NotAValidPath");
Assert.IsTrue(envVarFilePath.TryResolve(out absoluteFilePath3) == EnvVarPathResolvingStatus.ErrorEnvVarResolvedButCannotConvertToAbsolutePath);

Environment.SetEnvironmentVariable("ENVVAR", @"C:\DirA");

Assert.IsTrue(envVarFilePath.TryResolve(out absoluteFilePath3) == EnvVarPathResolvingStatus.Success);
Assert.IsTrue(absoluteFilePath3.ToString() == @"C:\DirA\DirB\File.txt");

Environment.SetEnvironmentVariable("ENVVAR", "");

Support for path that contain variable(s)

var variableFilePath = @"$(VarA)\DirB\$(VarC)\File.txt".ToVariableFilePath();

Assert.IsTrue(variableFilePath.PrefixVariable == "VarA");
Assert.IsTrue(variableFilePath.AllVariables.First() == "VarA");
Assert.IsTrue(variableFilePath.AllVariables.ElementAt(1) == "VarC");

IAbsoluteFilePath absoluteFilePath4;

Assert.IsTrue(variableFilePath.TryResolve(
   new KeyValuePair<string, string>[0],
   out absoluteFilePath4) == VariablePathResolvingStatus.ErrorUnresolvedVariable);

Assert.IsTrue(variableFilePath.TryResolve(
   new[] {new KeyValuePair<string, string>("VarA", "NotAValidPath"),
            new KeyValuePair<string, string>("VarC", "DirC")},
   out absoluteFilePath4) == VariablePathResolvingStatus.ErrorVariableResolvedButCannotConvertToAbsolutePath);

Assert.IsTrue(variableFilePath.TryResolve(
   new[] {new KeyValuePair<string, string>("VarA", @"C:\DirA"),
            new KeyValuePair<string, string>("VarC", "DirC")},
   out absoluteFilePath4) == VariablePathResolvingStatus.Success);

Assert.IsTrue(absoluteFilePath4.ToString() == @"C:\DirA\DirB\DirC\File.txt");

Support for path normalisation

Assert.IsTrue(@"C://DirA/\DirB//".ToDirectoryPath().ToString() == @"C:\DirA\DirB");
Assert.IsTrue(@"%ENVVAR%\DirA\..\DirB".ToDirectoryPath().ToString() == @"%ENVVAR%\DirB");
Assert.IsTrue(@".\..".ToDirectoryPath().ToString() == "..");
Assert.IsTrue(@".\..\.\Dir".ToDirectoryPath().ToString() == @"..\Dir");

Support for paths collection

IAbsoluteDirectoryPath commonRootDir;

Assert.IsTrue(new[] {
   @"C:\Dir".ToAbsoluteDirectoryPath(),
   @"C:\Dir\Dir1".ToAbsoluteDirectoryPath(),
   @"C:\Dir\Dir2\Dir3".ToAbsoluteDirectoryPath(),
}.TryGetCommonRootDirectory(out commonRootDir));

Assert.IsTrue(commonRootDir.ToString() == @"C:\Dir");

Possibility to work with IFilePath IDirectoryPath and be abstracted from the underlying kind (Absolute/Relative/EnvVar/Variable)

foreach (var s in new[] {
   @"C:\Dir\File.txt",
   @"\\Server\Share\Dir\File.txt",
   @"..\..\Dir\File.txt",
   @"%ENVVAR%\Dir\File.txt",
   @"$(Var)\Dir\File.txt",
}) {
   var filePath = s.ToFilePath();

   Assert.IsTrue(filePath.FileName == @"File.txt");
   Assert.IsTrue(filePath.HasParentDirectory);
   Assert.IsTrue(filePath.ParentDirectoryPath.DirectoryName == @"Dir");
}

Support for Try... syntax to avoid exception

IDirectoryPath directoryPath;

Assert.IsFalse(@"NotAValidPath".TryGetDirectoryPath(out directoryPath));

string failureReason;

Assert.IsFalse(@"NotAValidPath".IsValidDirectoryPath(out failureReason));
Assert.IsTrue(failureReason == @"The string ""NotAValidPath"" is not a valid directory path.");

Smart enough to distinguish between File and Directory path when possible

Assert.IsFalse(@"C:".IsValidFilePath());
Assert.IsFalse(@"\\Server\Share".IsValidFilePath());
Assert.IsTrue(@"C:".IsValidDirectoryPath());
Assert.IsTrue(@"\\Server\Share".IsValidDirectoryPath());

Assert.IsTrue(@"C:\Dir".IsValidFilePath());
Assert.IsTrue(@"\\Server\Share\Dir".IsValidFilePath());
Assert.IsTrue(@"C:\Dir".IsValidDirectoryPath());
Assert.IsTrue(@"\\Server\Share\Dir".IsValidDirectoryPath());