gh-35: Fail if WMI isn't ready, add basic service dependencies

Author: vholer

context.ps1

@@ -537,6 +537,13 @@ function extendPartitions()
 # Main
 ################################################################################
 
+# Check the working WMI
+if (-Not (Get-WMIObject -ErrorAction SilentlyContinue Win32_Volume)) {
+    Write-Output "WMI not ready, exiting"
+    Stop-Transcript | Out-Null
+    exit 1
+}
+
 Write-Output "Detecting contextualization data"
 Write-Output "- Looking for CONTEXT ISO"
 

package.wxs

@@ -56,7 +56,14 @@
               Start="auto"
               Account="[SYSTEM]"
               Arguments="-s onecontext"
-              ErrorControl="normal" />
+              ErrorControl="normal">
+
+              <ServiceDependency Id="Winmgmt" />
+              <ServiceDependency Id="PlugPlay" />
+              <ServiceDependency Id="Tcpip" />
+              <ServiceDependency Id="Dhcp" />
+              <ServiceDependency Id="Dnscache" />
+            </ServiceInstall>
 
             <ServiceControl Id="ocControl" Name="onecontext"
               Remove="both"