DrunkenRuby wiki

#!/usr/bin/env ruby
#!/usr/bin/ruby -rcgi
class GitWiki
  attr_accessor :wiki_dir, :main_page, :base_url
  def initialize(wiki_dir="/home/sbecker/drunkenruby.com/public/wiki/",base_url="drunken.cgi?page=%s",main_page = "DrunkenRuby")
    @wiki_dir = wiki_dir
    @main_page = main_page
    @base_url = base_url
  end

  def not_found_message(*args)
    "Page not found!"
  end

  def save_wiki_page(page,data,message = "No Message")
    `echo "#{data.gsub('"','\"')}" > wiki/#{page} `
    e = $?.exitstatus
    if e == 0
      `cd wiki &&git add . &&  git commit -m "#{message}" `
      true
    else
      false
    end
  end

  def get_wiki_revision_numbers(page,limit = 5 )
    revisions  = Array.new
    sys_rev = `cd wiki && git log --pretty=oneline #{page}`
    revisions = sys_rev.split("\n").map{|r| r.split[0]} if $?.exitstatus == 0
    revisions[1..5]
  end

  def get_page(name, revision=nil)
    t = nil
    if revision.to_s == ""
      t = `cat wiki/#{name}`
    else
      t = `cd wiki &&git show #{revision}:#{name}`
      t = "<br/>No rev:#{revision} found <br/><br/>"+ `cat wiki/#{name}` if $?.exitstatus != 0
    end
    t
  end
end

begin
wiki = GitWiki.new
c = CGI.new('html4')
n,d = c['page']!=''?c['page']:wiki.main_page,c['data']
e = nil
if d != ''
  if wiki.save_wiki_page(n,d,c["message"])
    print c.header({'Status' => '302 Moved', 'location' =>  wiki.base_url%"#{n}&save_status=#{e}"})

  end
  e = "There was an error saving." #the save failed
else
t = wiki.get_page(n,c["rev"]) || wiki.not_found_message
revisions = wiki.get_wiki_revision_numbers(n)

c.instance_eval{ out{ html(){
      "<head><title>DrunkenRuby wiki</title></head>"+
      body{
        h1{n}+e.to_s+
        div{a(wiki.base_url%wiki.main_page){wiki.main_page}if n != wiki.main_page}+br+br+
        div{
          t.gsub(/([A-Z]\w+){2}/){a(wiki.base_url%$&){$&}}
        }+br+
        a("id" => "edit_ref", "href" => "#","onclick" => "document.getElementById(\"form_block\").style.display=\"block\";document.getElementById(\"edit_ref\").style.display=\"none\""){}+
        div("id"=>"form_block","style"=>"display : none;"){
          form("get"){
            textarea('data'){
              t.strip
            }+br+"Change message:"+
            text_field("message", "", 40, 200)+
            hidden('page',n)+
            submit
          }
        }+br+br+"Revisions:"+
        revisions.to_a.map{|r| a(wiki.base_url%"#{n}&rev=#{r}"){r[0..5]}}.join(",")
      }
    }
  }
}
end
rescue Exception =>e
  File.open("cow","w+"){|f| f.puts( e.message);f.puts(e.backtrace.join("\n"))}
end