add native type tempest_glance_id_setter

this hacky native type has been added to
populate the glance config params with the ids
that are only available after glance images have
been remotely installed.

lib/puppet/provider/tempest_glance_id_setter/ruby.rb

@@ -0,0 +1,54 @@
+Puppet::Type.type(:tempest_glance_id_setter).provide(:ruby) do
+
+  # almost entirely lifted from stdlib's file_line
+
+  def exists?
+    lines.find do |line|
+      should_line.chomp == line.chomp
+    end
+  end
+
+  def create
+    handle_create_with_match
+  end
+
+  def get_image_id
+    @image_id ||= model.catalog.resource("Glance_image[#{resource[:image_name]}]").provider.id
+  end
+
+  def should_line
+    "#{resource[:name]} = #{get_image_id}"
+  end
+
+  def match
+    /^\s*#{resource[:name]}\s*=\s*/
+  end
+
+  def handle_create_with_match()
+    regex = match
+    match_count = lines.select { |l| regex.match(l) }.count
+    if match_count > 1
+      raise Puppet::Error, "More than one line in file '#{resource[:tempest_conf_path]}' matches pattern '#{regex.to_s}'"
+    end
+    File.open(resource[:tempest_conf_path], 'w') do |fh|
+      lines.each do |l|
+        fh.puts(regex.match(l) ? should_line : l)
+      end
+
+      if (match_count == 0)
+        fh.puts(should_line)
+      end
+    end
+  end
+
+  private
+  def lines
+    # If this type is ever used with very large files, we should
+    #  write this in a different way, using a temp
+    #  file; for now assuming that this type is only used on
+    #  small-ish config files that can fit into memory without
+    #  too much trouble.
+    @lines ||= File.readlines(resource[:tempest_conf_path])
+  end
+
+end

lib/puppet/type/tempest_glance_id_setter.rb

@@ -0,0 +1,23 @@
+Puppet::Type.newtype(:tempest_glance_id_setter) do
+#
+#  tempest_glance_id_setter { 'image_id':
+#    tempest_conf_path => '/var/lib/tempest/etc/tempest.conf',
+#    image_name        => $name,
+#  }
+#
+
+  ensurable
+
+  newparam(:name, :namevar => true) do
+    desc 'name of the setting to update'
+  end
+
+  newparam(:tempest_conf_path) do
+    desc 'path to tempest conf file'
+  end
+
+  newparam(:image_name) do
+    desc 'name of glance image'
+  end
+
+end