config.rb in vagrant-puppet-install-3.0.0

- old
+ new

@@ -17,10 +17,13 @@
         if @puppet_version == UNSET_VALUE
           @puppet_version = nil
         elsif @puppet_version.to_s == 'latest'
           # resolve `latest` to a real version
           @puppet_version = retrieve_latest_puppet_version
+        elsif valid_puppet_version?(puppet_version)
+          # allows for pessimistic version constraint
+          @puppet_version = retrieve_latest_puppet_version(puppet_version)
         end
         @install_url = nil if @install_url == UNSET_VALUE
       end
 
       def validate!(machine)
@@ -46,12 +49,12 @@
       end
 
       private
 
       # Query RubyGems.org's Ruby API and retrive the latest version of Puppet.
-      def retrieve_latest_puppet_version
+      def retrieve_latest_puppet_version(version = nil)
         available_gems =
-          dependency_installer.find_gems_with_sources(puppet_gem_dependency)
+          dependency_installer.find_gems_with_sources(puppet_gem_dependency(version))
         spec, _source =
         if available_gems.respond_to?(:last)
           # DependencyInstaller sorts the results such that the last one is
           # always the one it considers best.
           spec_with_source = available_gems.last