jujuc: switch commands to use Context

worker/uniter/jujuc/juju-log.go

 package jujuc
 
 import (
         "errors"
         "launchpad.net/gnuflag"
         "launchpad.net/juju-core/cmd"
         "launchpad.net/juju-core/log"
         "strings"
 )
 
@@ skipping 22 matching lines @@
         args = f.Args()
         if args == nil {
                 return errors.New("no message specified")
         }
         c.Message = strings.Join(args, " ")
         return nil
 }
 
 func (c *JujuLogCommand) Run(_ *cmd.Context) error {
         badge := c.ctx.UnitName()
-        if c.ctx.HasHookRelation() {
-                badge = badge + " " + c.ctx.HookRelation().FakeId()

[niemeyer, 2012/10/09 17:33:30]

(1)

+        if r, found := c.ctx.HookRelation(); found {
+                badge = badge + " " + r.FakeId()
         }
         msg := badge + ": " + c.Message
         if c.Debug {
                 log.Debugf("%s", msg)
         } else {
                 log.Printf("%s", msg)
         }
         return nil
 }