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-rw-r--r--lib/puppet/parser/functions/defined_with_params.rb35
-rw-r--r--lib/puppet/parser/functions/ensure_resource.rb35
2 files changed, 70 insertions, 0 deletions
diff --git a/lib/puppet/parser/functions/defined_with_params.rb b/lib/puppet/parser/functions/defined_with_params.rb
new file mode 100644
index 0000000..d7df306
--- /dev/null
+++ b/lib/puppet/parser/functions/defined_with_params.rb
@@ -0,0 +1,35 @@
+# Test whether a given class or definition is defined
+require 'puppet/parser/functions'
+
+Puppet::Parser::Functions.newfunction(:defined_with_params,
+ :type => :rvalue,
+ :doc => <<-'ENDOFDOC'
+Takes a resource reference and an optional hash of attributes.
+
+Returns true if a resource with the specified attributes has already been added
+to the catalog, and false otherwise.
+
+ user { 'dan':
+ ensure => present,
+ }
+
+ if ! defined_with_params(User[dan], {'ensure' => 'present' }) {
+ user { 'dan': ensure => present, }
+ }
+ENDOFDOC
+) do |vals|
+ reference, params = vals
+ raise(ArgumentError, 'Must specify a reference') unless reference
+ if (! params) || params == ''
+ params = {}
+ end
+ ret = false
+ if resource = findresource(reference.to_s)
+ matches = params.collect do |key, value|
+ resource[key] == value
+ end
+ ret = params.empty? || !matches.include?(false)
+ end
+ Puppet.debug("Resource #{reference} was not determined to be defined")
+ ret
+end
diff --git a/lib/puppet/parser/functions/ensure_resource.rb b/lib/puppet/parser/functions/ensure_resource.rb
new file mode 100644
index 0000000..fba2035
--- /dev/null
+++ b/lib/puppet/parser/functions/ensure_resource.rb
@@ -0,0 +1,35 @@
+# Test whether a given class or definition is defined
+require 'puppet/parser/functions'
+
+Puppet::Parser::Functions.newfunction(:ensure_resource,
+ :type => :statement,
+ :doc => <<-'ENDOFDOC'
+Takes a resource type, title, and a list of attributes that describe a
+resource.
+
+ user { 'dan':
+ ensure => present,
+ }
+
+This example only creates the resource if it does not already exist:
+
+ ensure_resource('user, 'dan', {'ensure' => 'present' })
+
+If the resource already exists but does not match the specified parameters,
+this function will attempt to recreate the resource leading to a duplicate
+resource definition error.
+
+ENDOFDOC
+) do |vals|
+ type, title, params = vals
+ raise(ArgumentError, 'Must specify a type') unless type
+ raise(ArgumentError, 'Must specify a title') unless title
+ params ||= {}
+ Puppet::Parser::Functions.function(:defined_with_params)
+ if function_defined_with_params(["#{type}[#{title}]", params])
+ Puppet.debug("Resource #{type}[#{title}] not created b/c it already exists")
+ else
+ Puppet::Parser::Functions.function(:create_resources)
+ function_create_resources([type.capitalize, { title => params }])
+ end
+end