Remove compile time constants

Author: chtenb

Rubjerg.Graphviz/Constants.cs

@@ -0,0 +1,23 @@
+using System;
+using System.Runtime.InteropServices;
+
+public static class NativeLibraryNames
+{
+    public static string GvcLib => _gvcLib.Value;
+    public static string CGraphLib => _cgraphLib.Value;
+    public static string XDotLib => _xdotLib.Value;
+    public static string GraphvizWrapperLib => _wrapperLib.Value;
+
+    private static readonly Lazy<string> _gvcLib = new(() => Resolve("gvc.dll", "libgvc.so.6"));
+    private static readonly Lazy<string> _cgraphLib = new(() => Resolve("cgraph.dll", "libcgraph.so.6"));
+    private static readonly Lazy<string> _xdotLib = new(() => Resolve("xdot.dll", "libxdot.so.4"));
+    private static readonly Lazy<string> _wrapperLib = new(() => Resolve("GraphvizWrapper.dll", "libGraphvizWrapper.so"));
+
+    private static string Resolve(string windows, string linux, string? mac = null)
+    {
+        if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows)) return windows;
+        if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux)) return linux;
+        if (RuntimeInformation.IsOSPlatform(OSPlatform.OSX)) return mac ?? throw new PlatformNotSupportedException("macOS not supported yet.");
+        throw new PlatformNotSupportedException("Unknown platform");
+    }
+}

Rubjerg.Graphviz/NativeLibraryNames.cs

@@ -50,7 +50,7 @@ test-all: build-tests
     just test Rubjerg.Graphviz.TransitiveTest/Rubjerg.Graphviz.TransitiveTest.csproj
 
 # Run the nuget.org tests
-test-nugetorg: build-tests
+test-nugetorg:
     dotnet tool restore
     dotnet restore NugetOrgTests/Rubjerg.Graphviz.NugetOrgTests.sln
     just build NugetOrgTests/Rubjerg.Graphviz.NugetOrgTests.sln