add finish client

library/general/src/Makefile.am

@@ -83,8 +83,9 @@ fillup_DATA = \
 
 ylibdir = "${yast2dir}/lib/installation"
 ylib_DATA = \
+  lib/installation/finish_client.rb \
   lib/installation/proposal_client.rb
 
-EXTRA_DIST = $(module_DATA) $(client_DATA) $(scrconf_DATA) $(agent_SCRIPTS) $(ydata_DATA) $(fillup_DATA)
+EXTRA_DIST = $(module_DATA) $(client_DATA) $(scrconf_DATA) $(agent_SCRIPTS) $(ydata_DATA) $(fillup_DATA) $(ylib_DATA)
 
 include $(top_srcdir)/Makefile.am.common

library/general/src/lib/installation/finish_client.rb

@@ -0,0 +1,50 @@
+require "yast"
+
+module Installation
+  # Abstract class that simplify writting finish clients for installation.
+  # It provides single entry point and abstract methods, that all finish clients
+  # need to implement.
+  # @example how to run client
+  #   require "installation/example_finish"
+  #   ::Installation::ExampleFinish.run
+  # @see for example client in installation clone_finish.rb
+  # @see inst_finish in yast2-installation doc to get overview of finish client API
+  class FinishClient < Client
+    include Yast::Logger
+
+    # Entry point for calling client. Only part needed in client rb file.
+    # @return response from abstract methods
+    def self.run
+      self.new.run
+    end
+
+    # Dispatches to abstract method based on passed arguments to client
+    def run
+      func = Yast::WFM.Args
+      case func
+      when "Info"
+        info
+      when "Write"
+        write
+      else
+        raise "Invalid action for proposal '#{func.inspect}'"
+      end
+    end
+
+  protected
+
+    # Abstract method to write configuration
+    def write
+      raise NotImplementedError, "Calling abstract method 'write'"
+    end
+
+    # Abstract method to provide information about client
+    # @return [Map] with keys "steps" which specify number of client steps,
+    #   "when" with list of symbols for modes when client make sense, if missing,
+    #   then run always. And last but not least is tittle which is used to display
+    #   to user what happening.
+    def info
+      raise NotImplementedError, "Calling abstract method 'info'"
+    end
+  end
+end