1 files changed, 35 insertions, 0 deletions
diff --git a/puppet/modules/stdlib/lib/puppet/parser/functions/ensure_packages.rb b/puppet/modules/stdlib/lib/puppet/parser/functions/ensure_packages.rb
new file mode 100644
index 00000000..f1da4aaa
--- /dev/null
+++ b/puppet/modules/stdlib/lib/puppet/parser/functions/ensure_packages.rb
@@ -0,0 +1,35 @@
+#
+# ensure_packages.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:ensure_packages, :type => :statement, :doc => <<-EOS
+Takes a list of packages and only installs them if they don't already exist.
+It optionally takes a hash as a second parameter that will be passed as the
+third argument to the ensure_resource() function.
+    EOS
+  ) do |arguments|
+
+    if arguments.size > 2 or arguments.size == 0
+      raise(Puppet::ParseError, "ensure_packages(): Wrong number of arguments " +
+        "given (#{arguments.size} for 1 or 2)")
+    elsif arguments.size == 2 and !arguments[1].is_a?(Hash) 
+      raise(Puppet::ParseError, 'ensure_packages(): Requires second argument to be a Hash')
+    end
+
+    packages = Array(arguments[0])
+
+    if arguments[1]
+      defaults = { 'ensure' => 'present' }.merge(arguments[1])
+    else
+      defaults = { 'ensure' => 'present' }
+    end
+
+    Puppet::Parser::Functions.function(:ensure_resource)
+    packages.each { |package_name|
+      function_ensure_resource(['package', package_name, defaults ])
+    }
+  end
+end
+
+# vim: set ts=2 sw=2 et :