Initial commit (history squashed)

src/StellaOps.Feedser.Exporter.Json/ExporterVersion.cs

@@ -0,0 +1,28 @@
+using System;
+using System.Reflection;
+
+namespace StellaOps.Feedser.Exporter.Json;
+
+public static class ExporterVersion
+{
+    public static string GetVersion(Type anchor)
+    {
+        ArgumentNullException.ThrowIfNull(anchor);
+        var assembly = anchor.Assembly;
+
+        var informational = assembly.GetCustomAttribute<AssemblyInformationalVersionAttribute>()?.InformationalVersion;
+        if (!string.IsNullOrWhiteSpace(informational))
+        {
+            return informational;
+        }
+
+        var fileVersion = assembly.GetCustomAttribute<AssemblyFileVersionAttribute>()?.Version;
+        if (!string.IsNullOrWhiteSpace(fileVersion))
+        {
+            return fileVersion!;
+        }
+
+        var version = assembly.GetName().Version;
+        return version?.ToString() ?? "0.0.0";
+    }
+}