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authorJaka Hudoklin <jakahudoklin@gmail.com>2013-01-02 12:10:43 +0000
committerJeff McCune <jeff@puppetlabs.com>2013-01-09 17:51:12 -0800
commit20e0e0709021b7ba4a819f1324526d98bcb5dcc3 (patch)
tree85d283d806ded7d21a02c0fda4ce8df7ebc9906f /lib
parentd674190d8e160b74250c514775003569b36d9984 (diff)
downloadpuppet-stdlib-20e0e0709021b7ba4a819f1324526d98bcb5dcc3.tar.gz
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Add getparam function to get defined resource parameters
As far as i know there's no other puppet-dsl-like way to get parameter of defined resource, so that's why i implemented getparam function, which takes resource reference and parameter name and returns parameter value. Here's another example why this function is really useful: define config($path, $config_param1, $config_param2) { } define example_resource($config) { $path = getparam($config, "path") notice("Path is $path") } define example_resource2($example_resource, $config = getparam($example_resource, "config")) { $config_param1 = getparam($config, "config_param1") notice("Config parameter is $config_param1") } define example_resource3($example_resource, $config = getparam($example_resource, "config")) { $config_param2 = getparam($config, "config_param2") notice("Config parameter is $config_param2") } class test_getparam { config { "config_instance": path => "/some/config/path", config_param1 => "someconfigtext1", config_param2 => "someconfigtext2", } example_resource { "example_resource_instance": config => Config["config_instance"] } example_resource2 { "example_resource_instance": example_resource => Example_resource["example_resource_instance"] } example_resource3 { "example_resource_instance": example_resource => Example_resource2["example_resource_instance"] } } class { "test_getparam": }
Diffstat (limited to 'lib')
-rw-r--r--lib/puppet/parser/functions/getparam.rb33
1 files changed, 33 insertions, 0 deletions
diff --git a/lib/puppet/parser/functions/getparam.rb b/lib/puppet/parser/functions/getparam.rb
new file mode 100644
index 0000000..0962656
--- /dev/null
+++ b/lib/puppet/parser/functions/getparam.rb
@@ -0,0 +1,33 @@
+# Test whether a given class or definition is defined
+require 'puppet/parser/functions'
+
+Puppet::Parser::Functions.newfunction(:getparam,
+ :type => :rvalue,
+ :doc => <<-'ENDOFDOC'
+Takes a resource reference and name of the parameter and
+returns value of resource's parameter.
+
+*Examples:*
+
+ define example_resource($param) {
+ }
+
+ example_resource { "example_resource_instance":
+ param => "param_value"
+ }
+
+ getparam(Example_resource["example_resource_instance"], "param")
+
+Would return: param_value
+ENDOFDOC
+) do |vals|
+ reference, param = vals
+ raise(ArgumentError, 'Must specify a reference') unless reference
+ raise(ArgumentError, 'Must specify name of a parameter') unless param and param.instance_of? String
+
+ if resource = findresource(reference.to_s)
+ return resource[param] if resource[param]
+ end
+
+ return ''
+end