Gum File Path Semantics

ToolsUtilities.FilePath is the repo's path type. Each difference below from raw-string behavior fails silently — wrong result, no exception.

== is case-insensitive; FullPath is case-preserving

FilePath equality compares Standardized, which is lowercased. FullPath keeps the original casing. Any logic about a case-only rename (Foo → foo) must compare FullPath ordinally — oldPath == newPath reports "nothing changed" for exactly the rename it needs to detect.

Standardized normalizes to Path.DirectorySeparatorChar, not /

FileManager.RemoveDotDotSlash does the conversion. A hardcoded Contains("/bin/") check therefore matches on Unix and is dead on Windows. This bites production code, not just test assertions.

.. is collapsed, . is not

A CodeProjectRoot of "./" yields paths like C:\Proj\.\Screens\X.cs, which never compare equal to what Directory.EnumerateFiles returns. Any code diffing computed paths against enumerated ones must run both sides through Path.GetFullPath first. CodeGenerationFileLocationsService output is the usual source of the computed side.

File.Move on a case-only rename is platform-divergent

Windows handles it directly; .NET pre-checks the destination on Unix and throws "already exists" on a case-insensitive macOS volume. Move through a temp name in two steps. A single-step move passes on Windows and fails only on the macOS CI leg, so a local run does not prove it.

Related

• gum-unit-tests — writing path assertions that hold on both Windows and Unix CI legs.