Remove EnvironmentInfo

This moved the last bit of usefulness of EnvironmentInfo into a static
class.

1 files changed, 72 insertions, 0 deletions

diff --git a/MediaBrowser.Common/System/OperatingSystem.cs b/MediaBrowser.Common/System/OperatingSystem.cs
new file mode 100644
index 000000000..640821d4d
--- /dev/null
+++ b/MediaBrowser.Common/System/OperatingSystem.cs
@@ -0,0 +1,72 @@
+using System;
+using System.Runtime.InteropServices;
+using System.Threading;
+using MediaBrowser.Model.System;
+
+namespace MediaBrowser.Common.System
+{
+    public static class OperatingSystem
+    {
+        // We can't use Interlocked.CompareExchange for enums
+        private static int _id = int.MaxValue;
+
+        public static OperatingSystemId Id
+        {
+            get
+            {
+                if (_id == int.MaxValue)
+                {
+                    Interlocked.CompareExchange(ref _id, (int)GetId(), int.MaxValue);
+                }
+
+                return (OperatingSystemId)_id;
+            }
+        }
+
+        public static string Name
+        {
+            get
+            {
+                switch (Id)
+                {
+                    case OperatingSystemId.BSD: return "BSD";
+                    case OperatingSystemId.Linux: return "Linux";
+                    case OperatingSystemId.Darwin: return "macOS";
+                    case OperatingSystemId.Windows: return "Windows";
+                    default: throw new Exception($"Unknown OS {Id}");
+                }
+            }
+        }
+
+        private static OperatingSystemId GetId()
+        {
+            switch (Environment.OSVersion.Platform)
+            {
+                // On .NET Core `MacOSX` got replaced by `Unix`, this case should never be hit.
+                case PlatformID.MacOSX:
+                    return OperatingSystemId.Darwin;
+                case PlatformID.Win32NT:
+                    return OperatingSystemId.Windows;
+                case PlatformID.Unix:
+                default:
+                    {
+                        string osDescription = RuntimeInformation.OSDescription;
+                        if (osDescription.IndexOf("linux", StringComparison.OrdinalIgnoreCase) != -1)
+                        {
+                            return OperatingSystemId.Linux;
+                        }
+                        else if (osDescription.IndexOf("darwin", StringComparison.OrdinalIgnoreCase) != -1)
+                        {
+                            return OperatingSystemId.Darwin;
+                        }
+                        else if (osDescription.IndexOf("bsd", StringComparison.OrdinalIgnoreCase) != -1)
+                        {
+                            return OperatingSystemId.BSD;
+                        }
+
+                        throw new Exception($"Can't resolve OS with description: '{osDescription}'");
+                    }
+            }
+        }
+    }
+}