state/..., worker/..., utils/...: use errgo

worker/uniter/hook/hook.go

Index: worker/uniter/hook/hook.go
=== modified file 'worker/uniter/hook/hook.go'
--- worker/uniter/hook/hook.go	2013-09-12 16:29:52 +0000
+++ worker/uniter/hook/hook.go	2014-02-10 18:23:58 +0000
@@ -5,8 +5,7 @@
 package hook
 
 import (
-	"fmt"
-
+	"launchpad.net/errgo/errors"
 	"launchpad.net/juju-core/charm/hooks"
 )
 
@@ -33,11 +32,11 @@
 	switch hi.Kind {
 	case hooks.RelationJoined, hooks.RelationChanged, hooks.RelationDeparted:
 		if hi.RemoteUnit == "" {
-			return fmt.Errorf("%q hook requires a remote unit", hi.Kind)
+			return errors.Newf("%q hook requires a remote unit", hi.Kind)
 		}
 		fallthrough
 	case hooks.Install, hooks.Start, hooks.ConfigChanged, hooks.UpgradeCharm, hooks.Stop, hooks.RelationBroken:
 		return nil
 	}
-	return fmt.Errorf("unknown hook kind %q", hi.Kind)
+	return errors.Newf("unknown hook kind %q", hi.Kind)
 }