Save this as glucky-markdown.rb somewhere...

```ruby
#!/usr/bin/env ruby

require 'uri'
require 'json'
require 'net/http'

def goog(msg)
  uri=URI.parse "http://ajax.googleapis.com/ajax/services/search/web?v=1.0&q=%s"\
        % URI.escape(msg)
  req = Net::HTTP::Get.new(uri.request_uri)
  http = Net::HTTP.new(uri.host)
  http.read_timeout = 5
  http.open_timeout = 5
  res = http.start { |server|
        server.request(req)
        }
  JSON.parse(res.body)['responseData']['results'][0]['url']
end

text = ARGV[0]
term = ARGV[1]

puts "[#{text}](#{goog(term)})"
```

Now, create a TextExpander Shell Script snippet with the following...

```bash
#!/bin/bash
source ~/.bashrc; ~/Scripts/glucky-markdown.rb "%filltext:name=Link Text:default=Link Text%" "%filltext:name=Search Text:default=Search Term%"
```

I use the `source ~/.bashrc` to get rbenv, and you'll need to update the path to point to your copy of that script.