upgrader: add Upgrader.DesiredVersion

state/api/params/internal.go

 // Copyright 2013 Canonical Ltd.
 // Licensed under the AGPLv3, see LICENCE file for details.
 
 package params
 
 import (
         "launchpad.net/juju-core/tools"
+        "launchpad.net/juju-core/version"
 )
 
 // Entity identifies a single entity.
 type Entity struct {
         Tag string
 }
 
 // Entities identifies multiple entities.
 type Entities struct {
         Entities []Entity
@@ skipping 236 matching lines @@
 }
 
 // AgentGetEntitiesResult holds the results of a
 // machineagent.API.GetEntities call for a single entity.
 type AgentGetEntitiesResult struct {
         Life  Life
         Jobs  []MachineJob
         Error *Error
 }
 
+// AgentVersionResult holds the version and possibly error for a given
+// DesiredVersion request
+type AgentVersionResult struct {
+        Version *version.Number
+        Error   *Error
+}
+
+// AgentVersionResults is a list of versions for the requested entities
+type AgentVersionResults struct {
+        Results []AgentVersionResult
+}
+
 // AgentToolsResult holds the tools and possibly error for a given AgentTools request
 type AgentToolsResult struct {
         Tools *tools.Tools
         Error *Error
 }
 
 // AgentToolsResults is a list of tools for various requested agents.
 type AgentToolsResults struct {
         Results []AgentToolsResult
 }
@@ skipping 41 matching lines @@
         StringsWatcherId string
         Changes          []string
         Error            *Error
 }
 
 // StringsWatchResults holds the results for any API call which ends up
 // returning a list of StringsWatchers.
 type StringsWatchResults struct {
         Results []StringsWatchResult
 }