Rename 'GraphPath' to the more logical 'Root'. This does not affect users except for a slight text change in the usage messge

config.go

@@ -8,9 +8,7 @@ import (
 // FIXME: separate runtime configuration from http api configuration
 type DaemonConfig struct {
 	Pidfile                     string
-	// FIXME: don't call this GraphPath, it doesn't actually
-	// point to /var/lib/docker/graph, which is confusing.
-	GraphPath                   string
+	Root                        string
 	ProtoAddresses              []string
 	AutoRestart                 bool
 	EnableCors                  bool
@@ -26,7 +24,7 @@ type DaemonConfig struct {
 func ConfigGetenv(job *engine.Job) *DaemonConfig {
 	var config DaemonConfig
 	config.Pidfile = job.Getenv("Pidfile")
-	config.GraphPath = job.Getenv("GraphPath")
+	config.Root = job.Getenv("Root")
 	config.AutoRestart = job.GetenvBool("AutoRestart")
 	config.EnableCors = job.GetenvBool("EnableCors")
 	if dns := job.Getenv("Dns"); dns != "" {

docker/docker.go

@@ -34,7 +34,7 @@ func main() {
 	flAutoRestart := flag.Bool("r", true, "Restart previously running containers")
 	bridgeName := flag.String("b", "", "Attach containers to a pre-existing network bridge. Use 'none' to disable container networking")
 	pidfile := flag.String("p", "/var/run/docker.pid", "File containing process PID")
-	flGraphPath := flag.String("g", "/var/lib/docker", "Path to graph storage base dir.")
+	flRoot := flag.String("g", "/var/lib/docker", "Path to use as the root of the docker runtime.")
 	flEnableCors := flag.Bool("api-enable-cors", false, "Enable CORS requests in the remote api.")
 	flDns := flag.String("dns", "", "Set custom dns servers")
 	flHosts := utils.ListOpts{fmt.Sprintf("unix://%s", docker.DEFAULTUNIXSOCKET)}
@@ -71,7 +71,7 @@ func main() {
 			flag.Usage()
 			return
 		}
-		eng, err := engine.New(*flGraphPath)
+		eng, err := engine.New(*flRoot)
 		if err != nil {
 			log.Fatal(err)
 		}
@@ -80,7 +80,7 @@ func main() {
 			log.Fatal(err)
 		}
 		job.Setenv("Pidfile", *pidfile)
-		job.Setenv("GraphPath", *flGraphPath)
+		job.Setenv("Root", *flRoot)
 		job.SetenvBool("AutoRestart", *flAutoRestart)
 		job.SetenvBool("EnableCors", *flEnableCors)
 		job.Setenv("Dns", *flDns)

runtime.go

@@ -582,21 +582,21 @@ func NewRuntime(config *DaemonConfig) (*Runtime, error) {
 }
 
 func NewRuntimeFromDirectory(config *DaemonConfig) (*Runtime, error) {
-	runtimeRepo := path.Join(config.GraphPath, "containers")
+	runtimeRepo := path.Join(config.Root, "containers")
 
 	if err := os.MkdirAll(runtimeRepo, 0700); err != nil && !os.IsExist(err) {
 		return nil, err
 	}
 
-	g, err := NewGraph(path.Join(config.GraphPath, "graph"))
+	g, err := NewGraph(path.Join(config.Root, "graph"))
 	if err != nil {
 		return nil, err
 	}
-	volumes, err := NewGraph(path.Join(config.GraphPath, "volumes"))
+	volumes, err := NewGraph(path.Join(config.Root, "volumes"))
 	if err != nil {
 		return nil, err
 	}
-	repositories, err := NewTagStore(path.Join(config.GraphPath, "repositories"), g)
+	repositories, err := NewTagStore(path.Join(config.Root, "repositories"), g)
 	if err != nil {
 		return nil, fmt.Errorf("Couldn't create Tag store: %s", err)
 	}
@@ -608,7 +608,7 @@ func NewRuntimeFromDirectory(config *DaemonConfig) (*Runtime, error) {
 		return nil, err
 	}
 
-	gographPath := path.Join(config.GraphPath, "linkgraph.db")
+	gographPath := path.Join(config.Root, "linkgraph.db")
 	initDatabase := false
 	if _, err := os.Stat(gographPath); err != nil {
 		if os.IsNotExist(err) {

runtime_test.go

@@ -46,8 +46,8 @@ func nuke(runtime *Runtime) error {
 	wg.Wait()
 	runtime.Close()
 
-	os.Remove(filepath.Join(runtime.config.GraphPath, "linkgraph.db"))
-	return os.RemoveAll(runtime.config.GraphPath)
+	os.Remove(filepath.Join(runtime.config.Root, "linkgraph.db"))
+	return os.RemoveAll(runtime.config.Root)
 }
 
 func cleanup(runtime *Runtime) error {
@@ -119,7 +119,7 @@ func init() {
 
 func setupBaseImage() {
 	config := &DaemonConfig{
-		GraphPath:   unitTestStoreBase,
+		Root:   unitTestStoreBase,
 		AutoRestart: false,
 		BridgeIface: unitTestNetworkBridge,
 	}

server.go

@@ -158,7 +158,7 @@ func (srv *Server) ContainerExport(name string, out io.Writer) error {
 }
 
 func (srv *Server) ImagesSearch(term string) ([]APISearch, error) {
-	r, err := registry.NewRegistry(srv.runtime.config.GraphPath, nil, srv.HTTPRequestFactory(nil))
+	r, err := registry.NewRegistry(srv.runtime.config.Root, nil, srv.HTTPRequestFactory(nil))
 	if err != nil {
 		return nil, err
 	}
@@ -702,7 +702,7 @@ func (srv *Server) poolRemove(kind, key string) error {
 }
 
 func (srv *Server) ImagePull(localName string, tag string, out io.Writer, sf *utils.StreamFormatter, authConfig *auth.AuthConfig, metaHeaders map[string][]string, parallel bool) error {
-	r, err := registry.NewRegistry(srv.runtime.config.GraphPath, authConfig, srv.HTTPRequestFactory(metaHeaders))
+	r, err := registry.NewRegistry(srv.runtime.config.Root, authConfig, srv.HTTPRequestFactory(metaHeaders))
 	if err != nil {
 		return err
 	}
@@ -911,7 +911,7 @@ func (srv *Server) ImagePush(localName string, out io.Writer, sf *utils.StreamFo
 
 	out = utils.NewWriteFlusher(out)
 	img, err := srv.runtime.graph.Get(localName)
-	r, err2 := registry.NewRegistry(srv.runtime.config.GraphPath, authConfig, srv.HTTPRequestFactory(metaHeaders))
+	r, err2 := registry.NewRegistry(srv.runtime.config.Root, authConfig, srv.HTTPRequestFactory(metaHeaders))
 	if err2 != nil {
 		return err2
 	}

utils_test.go

@@ -67,7 +67,7 @@ func newTestRuntime(prefix string) (runtime *Runtime, err error) {
 	}
 
 	config := &DaemonConfig{
-		GraphPath:   root,
+		Root:   root,
 		AutoRestart: false,
 	}
 	runtime, err = NewRuntimeFromDirectory(config)