Windows Updates in Ohai

gistfile1.txt

Ohai.plugin :WindowsPatches do
  provides "windowspatches"

  collect_data :windows do
    windowspatches Mash.new

    patch_data = shell_out('powershell.exe -NoLogo -NonInteractive -NoProfile -command "Get-HotFix | ConvertTo-Json"')
    parser = FFI_Yajl::Parser.new
    windowspatches["updates"] = []
    windowspatches["details"] = Mash.new
    parser.parse(patch_data.stdout).each do |update|
      windowspatches["updates"] << update["HotFixID"]
      windowspatches["details"][update["HotFixID"]] = Mash.new
      windowspatches["details"][update["HotFixID"]]["description"] = update["Description"]
      windowspatches["details"][update["HotFixID"]]["install_date"] = update["InstalledOn"]["DateTime"]
    end
  end
end

Output:

"windowspatches": {
  "updates": [
    "KB2919355",
    "KB2919442",
    "KB2937220",
    "KB2938772",
    "KB2939471",
    "KB2949621"
  ],
  "details": {
    "KB2919355": {
      "description": "Update",
      "install_date": "Friday, March 21, 2014 12:00:00 AM"
    },
    "KB2919442": {
      "description": "Update",
      "install_date": "Friday, March 21, 2014 12:00:00 AM"
    },
    "KB2937220": {
      "description": "Update",
      "install_date": "Friday, March 21, 2014 12:00:00 AM"
    },
    "KB2938772": {
      "description": "Update",
      "install_date": "Friday, March 21, 2014 12:00:00 AM"
    },
    "KB2939471": {
      "description": "Update",
      "install_date": "Friday, March 21, 2014 12:00:00 AM"
    },
    "KB2949621": {
      "description": "Hotfix",
      "install_date": "Friday, March 21, 2014 12:00:00 AM"
    }
  }
}