[packages,*] Package metadata should only be executed on applicable platforms, e.g. running which, or getting the Windows registry

Author: markfinal

packages/Gcc-4.8/bam/Scripts/MetaData.cs

@@ -36,6 +36,11 @@ public class MetaData :
 
         public MetaData()
         {
+            if (!Bam.Core.OSUtilities.IsLinuxHosting)
+            {
+                return;
+            }
+
             this.Meta.Add("ExpectedMajorVersion", 4);
             this.Meta.Add("ExpectedMinorVersion", 8);
 

packages/Mingw-4.8.1/bam/Scripts/MetaData.cs

@@ -36,6 +36,11 @@ public class MetaData :
 
         public MetaData()
         {
+            if (!Bam.Core.OSUtilities.IsWindowsHosting)
+            {
+                return;
+            }
+
             // TODO: some installations may not have a suffix - need to confirm
             this.Meta.Add("ToolSuffix", "-4.8.1");
         }

packages/VisualC-12.0/bam/Scripts/MetaData.cs

@@ -36,6 +36,11 @@ public class MetaData :
 
         public MetaData()
         {
+            if (!Bam.Core.OSUtilities.IsWindowsHosting)
+            {
+                return;
+            }
+
             // TODO: get this from the registry
             this.Meta.Add("InstallDir", @"C:\Program Files (x86)\Microsoft Visual Studio 12.0");
             this.Meta.Add("PlatformToolset", "v120");