src/ModuleCore/Git/GitManager.cs

@@ -1,6 +1,4 @@
-using System.Collections.Concurrent;
+namespace ModuleCore.Git;
-
-namespace ModuleCore.Git;
 
 // TODO: better name for this
 public class GitManager
@@ -13,19 +11,23 @@ public class GitManager
 	/// </summary>
 	internal static GitManager InternalFreshInstance => new();
 
-	private class GitRegistration
+	/// <summary>
-	{
+	/// Simply <see cref="Path.DirectorySeparatorChar"/>.ToString()
-		public required string Name { get; set; }
+	/// </summary>
-		public required string Location { get; set; }
+	private static readonly string DirectorySeparator = Path.DirectorySeparatorChar.ToString();
-	}
 
-	private readonly ConcurrentDictionary<string, GitRegistration> _registrations;
+	private readonly InternalDirectory _repositories;
+	private readonly Lock _readWriteLock = new();
 
 	private GitManager()
 	{
 		Console.WriteLine($"{nameof(GitManager)} init");
-
+		// Initialise the root container
-		_registrations = new ConcurrentDictionary<string, GitRegistration>();
+		_repositories = new InternalDirectory()
+		{
+			Name = DirectorySeparator,
+			InternalPath = DirectorySeparator
+		};
 	}
 
 	/// <summary>
@@ -37,19 +39,124 @@ public class GitManager
 	/// <returns>The normalised string the repository was registered against</returns>
 	public string RegisterRepo(string absoluteRepositoryLocation, string registrationName)
 	{
-		registrationName = string.IsNullOrWhiteSpace(registrationName)
+		// Depending on the caller, it might be possible that they've scripted automatic repo registration. Because I
+		// don't really want to account to all the subtle ways that can be parallised, I just naively lock on every
+		// registration attempt. This method should be quick regardless, and I could use ConcurrentDictionary except
+		// that means every instance of InternalDirectory would need it and yeah nah fuck that I can just lock at the
+		// top level
+		lock (_readWriteLock)
+		{
+			var normalisedName = NormaliseNamePath(string.IsNullOrWhiteSpace(registrationName)
 				? new DirectoryInfo(absoluteRepositoryLocation).Name
-			: registrationName;
+				: registrationName);
 
-		if (_registrations.TryAdd(registrationName, new GitRegistration()
+			// Regardless of if we get a name or not, the fully qualified version for us
+			// starts with a /
+			var directorySegmentsFromName = NameToSegments(normalisedName);
+
+			var added = _repositories.Add(absoluteRepositoryLocation, directorySegmentsFromName);
+
+			// Not sure about this, the Add should throw any exceptions on duplicate/failures but for now I'll leave this
+			// here
+			if (added == null)
 			{
-			    Name = registrationName,
+				throw new Exception("Failed to register location");
-			    Location = absoluteRepositoryLocation,
-		    }))
-		{
-			return registrationName;
 			}
 
-		throw new Exception($"Git repo already registered with the name {registrationName}");
+			return normalisedName;
+		}
+	}
+
+	/// <summary>
+	/// Takes a name and returns it as a queue of its parts, starting with a root of <see cref="DirectorySeparator"/>
+	/// </summary>
+	/// <param name="name"></param>
+	/// <returns></returns>
+	private Queue<string> NameToSegments(string name)
+	{
+		var segments = name.Split(DirectorySeparator);
+
+		return segments.Length == 1
+			? new Queue<string>([DirectorySeparator, name])
+			: new Queue<string>([DirectorySeparator, ..segments]);
+	}
+
+	/// <summary>
+	/// Normalises the path separators in the given string to use Path.DirectorySeparatorChar
+	/// </summary>
+	/// <param name="name"></param>
+	/// <returns></returns>
+	private string NormaliseNamePath(string name)
+	{
+		// Feels a bit hacky, but this will actually normalise a path to a valid form. So if the input is
+		// some/directory/paths, Path.GetRelativePath will normalise it to some\directory\paths, relative to ./
+		// which is kind of handy but I also just wish there was a Path method that would do this for me. I know that
+		// the whole point of Path is that it's based on a file system, but file systems can also be arbitrary and not
+		// always be drive rooted.
+		// Either way, this works and saves me having to reimplement a worse method when it's more important that users
+		// are able to use file paths in whatever form they prefer, which means we leverage the internal implementation
+		// in a weird way.
+		return Path.GetRelativePath("./", name);
+	}
+
+	private class InternalDirectory
+	{
+		/// <summary>
+		/// Name of the folder this 
+		/// </summary>
+		public string Name { get; set; } = null!;
+
+		public Dictionary<string, InternalDirectory> Children { get; set; } = [];
+
+		internal string InternalPath { get; set; }
+
+		/// <summary>
+		/// If not null, this is the absolute location of a registered git repository
+		/// </summary>
+		public string? FullRepositoryPath { get; set; }
+
+		/// <summary>
+		/// 
+		/// </summary>
+		/// <param name="absoluteRepositoryLocation"></param>
+		/// <param name="directorySegmentsFromName"></param>
+		/// <returns></returns>
+		/// <exception cref="Exception"></exception>
+		internal InternalDirectory? Add(string absoluteRepositoryLocation, Queue<string> directorySegmentsFromName)
+		{
+			var topStack = directorySegmentsFromName.Dequeue();
+
+			if (topStack != Name)
+			{
+				// logically it shouldn't be possible to have a value on top of the stack that _doesn't_ exist, but
+				// just incase we throw as this should only happen if an Add is attempted on the root and the queue was
+				// not correctly rooted to /
+				throw new Exception($"Directory segment does not seem to exist: {topStack}");
+			}
+
+			// We're at the end of the directory segments so we can safely say we're at the end of the tree so
+			// we add it to the relevant dictionary
+			if (directorySegmentsFromName.Count == 0)
+			{
+				FullRepositoryPath = absoluteRepositoryLocation;
+				return this;
+			}
+
+			var nextSegment = directorySegmentsFromName.Peek();
+
+			// Attempt to get the next level of the directory. If we don't have a key entry, create one
+			if (!Children.TryGetValue(nextSegment, out var nextChild))
+			{
+				nextChild = new InternalDirectory()
+				{
+					Name = nextSegment,
+					InternalPath = Path.Combine(InternalPath, nextSegment)
+				};
+				Children.Add(nextSegment, nextChild);
+			}
+
+			// add the next
+			return nextChild.Add(absoluteRepositoryLocation, directorySegmentsFromName);
+		}
 	}
 }

src/PowershellModule/Git/NewGitRepoCommand.cs

@@ -4,10 +4,10 @@ using System.IO;
 using System.Management.Automation;
 using ModuleCore.Git;
 
-namespace PowershellModule.Git.Commands;
+namespace PowershellModule.Git;
 
 [Cmdlet(VerbsCommon.New, Noun)]
-public sealed class NewGitRepoCommand : PSCmdlet
+public class NewGitRepoCommand : PSCmdlet
 {
 	private const string Noun = "GitRepo";
 

src/PowershellModule/Git/SetGitRepoCommand.cs

@@ -2,7 +2,7 @@
 using System.Management.Automation;
 using ModuleCore.Git;
 
-namespace PowershellModule.Git.Commands;
+namespace PowershellModule.Git;
 
 [Cmdlet(VerbsCommon.Set, Noun)]
 public class SetGitRepoCommand : PSCmdlet

tests/ModuleTests/Git/AddRegistrationTests.cs

@@ -74,44 +74,4 @@ public class AddRegistrationTests
 
 		Assert.Equal("repo", whitespaceName);
 	}
-
-	[Fact]
-	public void DuplicateRepoRegistrationShouldFail()
-	{
-		Settings.UseFileName(nameof(RepoRegistrationWithWhitespaceName));
-
-		var gitManager = GitManager.InternalFreshInstance;
-		var testRepoAbsolutePath = "Test:/some/test/repo";
-		string[] paths = ["test", "nested", "path"];
-		var names = (NormalSeparator: string.Join(Path.DirectorySeparatorChar, paths), AltSeparator: string.Join(Path.AltDirectorySeparatorChar, paths));
-
-		var firstRegistration = gitManager.RegisterRepo(testRepoAbsolutePath, names.NormalSeparator);
-		// TODO: make nested registrations fail in both directions and test
-		var secondRegistration = gitManager.RegisterRepo(testRepoAbsolutePath, Path.Combine(paths[..1]));
-
-		Assert.Equal(Path.Combine(paths), firstRegistration);
-		Assert.Equal(Path.Combine(paths[..1]), secondRegistration);
-
-		Assert.Throws<Exception>(() => gitManager.RegisterRepo(testRepoAbsolutePath, Path.Combine(paths[..1])));
-	}
-
-	[Fact]
-	public void DuplicateRepoRegistrationDifferentSlashShouldNotFail()
-	{
-		Settings.UseFileName(nameof(RepoRegistrationWithWhitespaceName));
-
-		var gitManager = GitManager.InternalFreshInstance;
-		var testRepoAbsolutePath = "Test:/some/test/repo";
-		string[] paths = ["test", "nested", "path"];
-		var names = (NormalSeparator: string.Join(Path.DirectorySeparatorChar, paths), AltSeparator: string.Join(Path.AltDirectorySeparatorChar, paths));
-
-		var firstRegistration = gitManager.RegisterRepo(testRepoAbsolutePath, names.NormalSeparator);
-		// TODO: make nested registrations fail in both directions and test
-		var secondRegistration = gitManager.RegisterRepo(testRepoAbsolutePath, Path.Combine(paths[..1]));
-		var differentPathSeparatorRegistration = gitManager.RegisterRepo(testRepoAbsolutePath, names.AltSeparator);
-
-		Assert.Equal(Path.Combine(paths), firstRegistration);
-		Assert.Equal(Path.Combine(paths[..1]), secondRegistration);
-		Assert.Equal(names.AltSeparator, differentPathSeparatorRegistration);
-	}
 }

tests/ModuleTests/Git/Snapshots/AddRegistrationTests/BasicRepoRegistration_2.verified.txt

@@ -1,2 +1,2 @@
 Attempted to register: other/path
-Registration result: other/path
+Registration result: other\path