Add -PackerOnly option

Add same functionality as build.sh to PS script

build.ps1

@@ -25,6 +25,9 @@
 .PARAMETER PackerPath
   The full path to the packer executable. Default is C:\Hashicorp\packer.exe
 
+.PARAMETER PackerOnly
+  This switch skips deploying boxes with vagrant after being built by packer
+
 .PARAMETER VagrantOnly
   This switch skips building packer boxes and instead downloads from Vagrant Cloud
 
@@ -48,6 +51,7 @@ Param(
   [ValidateSet('virtualbox', 'vmware_desktop')]
   [string]$ProviderName,
   [string]$PackerPath = 'C:\Hashicorp\packer.exe',
+  [switch]$PackerOnly,
   [switch]$VagrantOnly
 )
 
@@ -186,6 +190,7 @@ function preflight_checks {
       break
     }
   }
+  if (!($PackerOnly)) {
     Write-Host '[preflight_checks] Checking if Vagrant is installed'
     check_vagrant
 
@@ -233,6 +238,7 @@ function preflight_checks {
         break
       }
     }
+  }
   Write-Host '[preflight_checks] Finished.'
 }
 
@@ -262,11 +268,11 @@ function move_boxes {
   Write-Host "[move_boxes] Running.."
   Move-Item -Path $DL_DIR\Packer\*.box -Destination $DL_DIR\Boxes
   if (-Not (Test-Path "$DL_DIR\Boxes\windows_10_$PackerProvider.box")) {
-    Write-Error "Windows 10 box is missing from the Boxes directory. Qutting."
+    Write-Error "Windows 10 box is missing from the Boxes directory. Quitting."
     break
   }
   if (-Not (Test-Path "$DL_DIR\Boxes\windows_2016_$PackerProvider.box")) {
-    Write-Error "Windows 2016 box is missing from the Boxes directory. Qutting."
+    Write-Error "Windows 2016 box is missing from the Boxes directory. Quitting."
     break
   }
   Write-Host "[move_boxes] Finished."
@@ -387,6 +393,7 @@ if (!($VagrantOnly)) {
   move_boxes
 }
 
+if (!($PackerOnly)) {
   # Vagrant up each box and attempt to reload one time if it fails
   forEach ($VAGRANT_HOST in $LAB_HOSTS) {
     Write-Host "[main] Running vagrant_up_host for: $VAGRANT_HOST"
@@ -411,3 +418,4 @@ forEach ($VAGRANT_HOST in $LAB_HOSTS) {
   Write-Host "[main] Running post_build_checks"
   post_build_checks
   Write-Host "[main] Finished post_build_checks"
+}