feat: Hide first-logon console during answer generation (#2152)

src/answer.sh

@@ -71,6 +71,11 @@ updateXML() {
     return 1
   fi
 
+  if ! updateLogonCommandXML "$asset"; then
+    error "Failed to update first-logon command in answer file!"
+    return 1
+  fi
+
   if ! updateEditionXML "$asset"; then
     error "Failed to update edition settings in answer file!"
     return 1
@@ -521,6 +526,38 @@ updateAutologinXML() {
   return 0
 }
 
+updateLogonCommandXML() {
+
+  local asset="$1"
+
+  case "${DETECTED,,}" in
+    "winvista"* ) return 0 ;;
+  esac
+
+  local command="$XML_COMPONENT_SHELL_OOBE/u:FirstLogonCommands/u:SynchronousCommand/u:CommandLine"
+  local expected='cmd.exe /d /c call "%WINDIR%\Setup\Scripts\SetupComplete.cmd" logon'
+  local hidden="powershell.exe -NoLogo -NoProfile -NonInteractive -WindowStyle Hidden -Command \"& \$env:ComSpec /d /c ('call ' + [char]34 + \$env:WINDIR + '\Setup\Scripts\SetupComplete.cmd' + [char]34 + ' logon'); exit \$LASTEXITCODE\""
+
+  local count value
+  count=$(getXMLNodeCount "$asset" "$command") || return 1
+
+  if [ "$count" != "1" ]; then
+    error "Failed to find a unique first-logon command in answer file: $asset"
+    return 1
+  fi
+
+  value=$(xmlstarlet sel -N "$XML_NS_UNATTEND_ARG" -T -t -v "string($command)" "$asset") || return 1
+
+  if [ "$value" != "$expected" ]; then
+    error "Unexpected first-logon command in answer file: $asset"
+    return 1
+  fi
+
+  xmlstarlet ed -L -N "$XML_NS_UNATTEND_ARG" -u "$command" -v "$hidden" "$asset" || return 1
+
+  return 0
+}
+
 updateProductKey() {
 
   local script="$1"