CODEWITHSUNDEEP
rubywindowsregistry
Ryan
Ryan

Reputation: 4697

Query installed software on windows with ruby

I want to query all of the installed software on a windows machine. I found another post that was doing something similar here.

I modified the code slightly:

require 'win32/registry'

Win32::Registry::HKEY_LOCAL_MACHINE.open('Software\Microsoft\Windows\CurrentVersion\Uninstall') do |reg|
    reg.each_key do |key1,key2|
        k = reg.open(key1)

        puts k["DisplayName"]    rescue "?"
        puts k["DisplayVersion"] rescue "?"
        puts k["Publisher"]      rescue "?"
        puts k["URLInfoAbout"]   rescue "?"
        puts
    end
end

This gets me some information, but I'd like to obtain other information about the software. For example, it'd be great to have an installation date, license information, etc.

I'm very new to ruby. How do I know what the indices or keys into k are? Obviously, "DisplayName" is one, but how do I find others? Is there a better way to go about getting this information programmatically?

Upvotes: 1

Views: 1267

Answers (1)

Vasiliy Ermolovich
Vasiliy Ermolovich

Reputation: 24627

If you just want to know complete information about the software, you can use this: 

require 'win32/registry'
require 'pp' # for pretty print

Win32::Registry::HKEY_LOCAL_MACHINE.open('Software\Microsoft\Windows\CurrentVersion\Uninstall') do |reg|
    reg.each_key do |key1,key2|
        k = reg.open(key1)
        pp k.inject([]) {|info, data| info << data}
    end
end

And you'll get something like this:

 ["UninstallString",
  1,
  "\"C:\\WINDOWS\\$NtUninstallKB2393802$\\spuninst\\spuninst.exe\""],
 ["TSAware", 4, 1],
 ["NoModify", 4, 1],
 ["InstallDate", 1, "20110313"],
 ["Publisher", 1, "Microsoft Corporation"],
 ["NoRepair", 4, 1],
 ["HelpLink", 1, "http://support.microsoft.com?kbid=2393802"],
 ["URLInfoAbout", 1, "http://support.microsoft.com"],
 ["DisplayVersion", 1, "1"],
 ["ParentKeyName", 1, "OperatingSystem"],
 ["ParentDisplayName",

and so on.

Upvotes: 3

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