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authorJeff McCune <jeff@puppetlabs.com>2011-06-21 14:10:33 -0700
committerJeff McCune <jeff@puppetlabs.com>2011-06-21 15:12:46 -0700
commit2bca41a9c41225ecb794134c006908cb197bb8e2 (patch)
treec1de90660b0487acfd2066e4d33979c660f2ca9c /lib/puppet/parser
parentc642cf4947b3cb7f0b845acee5cc483adc9c0aef (diff)
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(#8010) Add getvar() rvalue function
This isn't directly related to #8010, but rather indirectly fills the need to allow the end user to configure where data values are looked up. This allows the namespace to be passed as a class parameter. A module may then quickly and easily look up data from the user-defined namespace.
Diffstat (limited to 'lib/puppet/parser')
-rw-r--r--lib/puppet/parser/functions/getvar.rb23
1 files changed, 23 insertions, 0 deletions
diff --git a/lib/puppet/parser/functions/getvar.rb b/lib/puppet/parser/functions/getvar.rb
new file mode 100644
index 0000000..ffd774d
--- /dev/null
+++ b/lib/puppet/parser/functions/getvar.rb
@@ -0,0 +1,23 @@
+module Puppet::Parser::Functions
+
+ newfunction(:getvar, :type => :rvalue, :doc => <<-'ENDHEREDOC') do |args|
+ Lookup a variable in a remote namespace.
+
+ For example:
+
+ $foo = getvar('site::data::foo')
+
+ This is useful if the namespace itself is stored in a string:
+
+ $bar = getvar("${datalocation}::bar")
+ ENDHEREDOC
+
+ unless args.length == 1
+ raise Puppet::ParseError, ("getvar(): wrong number of arguments (#{args.length}; must be 1)")
+ end
+
+ self.lookupvar("#{args[0]}")
+
+ end
+
+end