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authorJeff McCune <jeff@puppetlabs.com>2012-02-29 12:47:08 -0800
committerJeff McCune <jeff@puppetlabs.com>2012-03-05 16:26:22 -0800
commita452f6a9af21d9ec5f34e6cda40af0ec3971b422 (patch)
tree595c5f48927dfeaa7e5cbc215b50ea7c1b83fc5a /lib/facter
parentc0ac470e764841b0de88dbabade342dc2c1b193e (diff)
(#12357) Add puppet_vardir custom fact
Without this patch the PE modules don't have a way to identify a filesystem path where it's OK to place variable data related to managing the target node. This is a problem when a module like pe_compliance needs to write a wrapper script to the node's filesystem. This patch addresses the problem by exposing the node's Puppet[:vardir] setting as a Facter fact. This fact value will be set to `nil` if Puppet is not loaded into memory. If Puppet is loaded, e.g. using `facter --puppet` or using `puppet agent` or `puppet apply` then the fact will automatically set the value to Puppet[:vardir] The value of this setting is subject to Puppet's run_mode. This patch implements a new utility method in the standard library module named `Facter::Util::PuppetSettings.with_puppet`. The method accepts a block and will only invoke the block if the Puppet library is loaded into the Ruby process. If Puppet is not loaded, the method always returns nil. This makes it easy to define Facter facts that only give values if Puppet is loaded in memory.
Diffstat (limited to 'lib/facter')
-rw-r--r--lib/facter/puppet_vardir.rb16
-rw-r--r--lib/facter/util/puppet_settings.rb17
2 files changed, 33 insertions, 0 deletions
diff --git a/lib/facter/puppet_vardir.rb b/lib/facter/puppet_vardir.rb
new file mode 100644
index 0000000..755e33c
--- /dev/null
+++ b/lib/facter/puppet_vardir.rb
@@ -0,0 +1,16 @@
+# This facter fact returns the value of the Puppet vardir setting for the node
+# running puppet or puppet agent. The intent is to enable Puppet modules to
+# automatically have insight into a place where they can place variable data,
+# regardless of the node's platform.
+#
+# The value should be directly usable in a File resource path attribute.
+require 'facter/util/puppet_settings'
+
+Facter.add(:puppet_vardir) do
+ setcode do
+ # This will be nil if Puppet is not available.
+ Facter::Util::PuppetSettings.with_puppet do
+ Puppet[:vardir]
+ end
+ end
+end
diff --git a/lib/facter/util/puppet_settings.rb b/lib/facter/util/puppet_settings.rb
new file mode 100644
index 0000000..c8c8363
--- /dev/null
+++ b/lib/facter/util/puppet_settings.rb
@@ -0,0 +1,17 @@
+module Facter
+ module Util
+ module PuppetSettings
+ class << self
+ def with_puppet
+ begin
+ Module.const_get("Puppet")
+ rescue NameError
+ nil
+ else
+ yield
+ end
+ end
+ end
+ end
+ end
+end