From a082a02e6c14285ad839665b3190ab23eae850fc Mon Sep 17 00:00:00 2001
From: Andrew Schwartzmeyer <andschwa@microsoft.com>
Date: Fri, 8 Apr 2016 15:04:27 -0700
Subject: [PATCH] Add PowerShell variables corresponding to platform

This deprecates the Microsoft.PowerShell.Platform module and ensure that
IsLinux/OSX/Windows/Core variables are defined all throughout PowerShell.
---
 .../engine/InitialSessionState.cs             | 26 +++++++++++++++++++
 .../engine/SpecialVariables.cs                | 14 ++++++++++
 2 files changed, 40 insertions(+)

diff --git a/src/System.Management.Automation/engine/InitialSessionState.cs b/src/System.Management.Automation/engine/InitialSessionState.cs
index e1d807dcaf..f0c84c5b67 100644
--- a/src/System.Management.Automation/engine/InitialSessionState.cs
+++ b/src/System.Management.Automation/engine/InitialSessionState.cs
@@ -5101,6 +5101,32 @@ end
                 RemotingErrorIdStrings.PSSessionAppName,
                 ScopedItemOptions.None),
             // End: Variables which control remoting behavior
+
+            #region Platform
+            new SessionStateVariableEntry(
+                SpecialVariables.IsLinux,
+                Platform.IsLinux,
+                String.Empty,
+                ScopedItemOptions.ReadOnly | ScopedItemOptions.AllScope),
+
+            new SessionStateVariableEntry(
+                SpecialVariables.IsOSX,
+                Platform.IsOSX,
+                String.Empty,
+                ScopedItemOptions.ReadOnly | ScopedItemOptions.AllScope),
+
+            new SessionStateVariableEntry(
+                SpecialVariables.IsWindows,
+                Platform.IsWindows,
+                String.Empty,
+                ScopedItemOptions.ReadOnly | ScopedItemOptions.AllScope),
+
+            new SessionStateVariableEntry(
+                SpecialVariables.IsCore,
+                Platform.IsCore,
+                String.Empty,
+                ScopedItemOptions.ReadOnly | ScopedItemOptions.AllScope),
+            #endregion
         };
 
         /// <summary>
diff --git a/src/System.Management.Automation/engine/SpecialVariables.cs b/src/System.Management.Automation/engine/SpecialVariables.cs
index 2f6dd0a014..a6a83d8837 100644
--- a/src/System.Management.Automation/engine/SpecialVariables.cs
+++ b/src/System.Management.Automation/engine/SpecialVariables.cs
@@ -156,6 +156,20 @@ namespace System.Management.Automation
         internal const string PSModuleAutoLoading = "PSModuleAutoLoadingPreference";
         internal static VariablePath PSModuleAutoLoadingPreferenceVarPath = new VariablePath("global:" + PSModuleAutoLoading);
 
+        #region Platform Variables
+        internal const string IsLinux = "IsLinux";
+        internal static VariablePath IsLinuxPath = new VariablePath("IsLinux");
+
+        internal const string IsOSX = "IsOSX";
+        internal static VariablePath IsOSXPath = new VariablePath("IsOSX");
+
+        internal const string IsWindows = "IsWindows";
+        internal static VariablePath IsWindowsPath = new VariablePath("IsWindows");
+
+        internal const string IsCore = "IsCore";
+        internal static VariablePath IsCorePath = new VariablePath("IsCore");
+
+        #endregion
         #region Preference Variables
 
         internal const string DebugPreference = "DebugPreference";