Changing the name of the file to reflect change in the function name.

1 files changed, 72 insertions, 0 deletions

diff --git a/load_variables.rb b/load_variables.rb
new file mode 100644
index 0000000..ddfc0ef
--- /dev/null
+++ b/load_variables.rb
@@ -0,0 +1,72 @@
+#
+# load_vars.rb
+#
+# This script will allow for loading variables from an external YAML
+# file and expose them for further use inside the Puppet manifest file ...
+#
+# For example:
+#
+# Given following content of the data.yaml file:
+#
+#   ---
+#   host1.example.com:
+#     foo: bar
+#     baz: quux
+#     question: 42
+#   host2.example.com:
+#     abc: def
+#     this: that
+#     darth: vader
+#
+# Then calling load_vars in Puppet manifest file as follows:
+#
+#   load_vars("/etc/puppet/data.yaml", $fqdn)
+#
+# Will result in addition of variables $foo, $baz and $question
+# for matching host name as per the variable $fqdn ...
+#
+# Another example which uses per-host file:
+#
+# Given following content of the file data-host1.example.com.yaml:
+#
+#   ---
+#   foo: bar
+#
+# Then when we call load_vars like this:
+#
+#   load_vars("/etc/puppet/data-$fqdn.yaml")
+#
+# This will result in a variable $foo being added and ready for use.
+#
+
+module Puppet::Parser::Functions
+  newfunction(:load_vars, :type => :statement) do |arguments|
+
+    raise(Puppet::ParseError, "Wrong number of arguments " +
+      "given (#{arguments.size} for 2)") if arguments.size < 2
+
+    data = {}
+
+    file = arguments[0]
+    key  = arguments[1] if arguments[1]
+
+    if File.exists?(file)
+
+      begin
+        data = YAML.load_file(file)
+      rescue => error
+        raise(Puppet::ParseError, "Unable to load data " +
+          "from the file `%s': %s" % file, error.to_s)
+      end
+
+      raise(Puppet::ParseError, "Data in the file `%s' " +
+        "is not a hash" % file) unless data.is_a?(Hash)
+
+      data = ((data[key] and data[key].is_a?(Hash)) ? data[key] : {}) if key
+    end
+
+    data.each { |param, value| setvar(param, strinterp(value)) }
+  end
+end
+
+# vim: set ts=2 sw=2 et :