Class: Inspec::Resources::WindowsPkg

Inherits:
PkgManagement show all
Defined in:
lib/inspec/resources/package.rb

Overview

Determines the installed packages on Windows using the Windows package registry entries. @see: blogs.technet.com/b/heyscriptingguy/archive/2013/11/15/use-powershell-to-find-installed-software.aspx

Instance Attribute Summary

Attributes inherited from PkgManagement

#inspec

Instance Method Summary collapse

Methods inherited from PkgManagement

#initialize, #missing_requirements

Constructor Details

This class inherits a constructor from Inspec::Resources::PkgManagement

Instance Method Details

#info(package_name) ⇒ Object 



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# File 'lib/inspec/resources/package.rb', line 281

def info(package_name)
  search_paths = [
    'HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\*',
    'HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\*',
  ]

  # add 64 bit search paths
  if inspec.os.arch == "x86_64"
    search_paths << 'HKLM:\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\*'
    search_paths << 'HKCU:\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\*'
  end

  # Find the package
  cmd = inspec.command <<-EOF.gsub(/^\s*/, "")
    Get-ItemProperty (@("#{search_paths.join('", "')}") | Where-Object { Test-Path $_ }) |
    Where-Object { $_.DisplayName -match "^\s*#{package_name.shellescape}\.*" -or $_.PSChildName -match "^\s*#{package_name.shellescape}\.*" } |
    Select-Object -Property DisplayName,DisplayVersion | ConvertTo-Json
  EOF

  # We cannot rely on `exit_status` since PowerShell always exits 0 from the
  # above command. Instead, if no package is found the output of the command
  # will be `''` so we can use that to return `{}` to match the behavior of
  # other package managers.
  return {} if cmd.stdout == ""

  begin
    package = JSON.parse(cmd.stdout)
  rescue JSON::ParserError => e
    raise Inspec::Exceptions::ResourceFailed,
      "Failed to parse JSON from PowerShell. " \
      "Error: #{e}"
  end

  # What if we match multiple packages?  just pick the first one for now.
  package = package[0] if package.is_a?(Array)

  {
    name: package["DisplayName"],
    installed: true,
    version: package["DisplayVersion"],
    type: "windows",
  }
end