diff --git a/apt/manifests/init.pp b/apt/manifests/init.pp
index 6b2e4f7..0f01a3b 100644
--- a/apt/manifests/init.pp
+++ b/apt/manifests/init.pp
@@ -16,6 +16,62 @@ class apt {
 }
 
 
+# Install common packages for using PPA's.
+#
+class apt::ppa::helper {
+
+    package { "python-software-properties":
+        ensure => installed,
+    }
+
+}
+
+
+# Add PPA archive to system.
+#
+# === Parameters
+#
+#   $name:
+#       PPA name. Needs to be in format "ppa:user/ppa-name".
+#
+#   $ensure:
+#       Ensure archive is absent or present. Defaults to present.
+#
+# === Sample usage
+#
+# apt::ppa { "ppa:igraph/ppa": }
+#
+define apt::ppa($ensure = "present") {
+
+    tag("bootstrap")
+
+    include apt::ppa::helper
+    $fname = gsub($name, "^ppa:([^\/]+)\/(.+)", "\\1-\\2-${lsbdistcodename}.list")
+
+    case $ensure {
+        "present": {
+            exec { "add-apt-repository ${name}":
+                path    => "/bin:/usr/bin:/sbin:/usr/sbin",
+                user    => "root",
+                creates => $fname,
+                require => Package["python-software-properties"],
+                notify  => Exec["apt-get-update"],
+            }
+        }
+        "absent": {
+            file { $fname:
+                ensure => absent,
+                notify => Exec["apt-get-update"],
+            }
+        }
+        default: {
+            fail("test")
+        }
+    }
+
+}
+
+
 # Configure /etc/apt/sources.list
 #
 # === Global variables