Make experimental a runtime flag

Signed-off-by: Kenfe-Mickael Laventure <mickael.laventure@gmail.com>

interface.go

@@ -127,6 +127,7 @@ type SystemAPIClient interface {
 	Info(ctx context.Context) (types.Info, error)
 	RegistryLogin(ctx context.Context, auth types.AuthConfig) (types.AuthResponse, error)
 	DiskUsage(ctx context.Context) (types.DiskUsage, error)
+	Ping(ctx context.Context) (bool, error)
 }
 
 // VolumeAPIClient defines API client methods for the volumes

interface_experimental.go

@@ -1,5 +1,3 @@
-// +build experimental
-
 package client
 
 import (
@@ -7,9 +5,7 @@ import (
 	"golang.org/x/net/context"
 )
 
-// APIClient is an interface that clients that talk with a docker server must implement.
-type APIClient interface {
-	CommonAPIClient
+type apiClientExperimental interface {
 	CheckpointAPIClient
 	PluginAPIClient
 }
@@ -32,6 +28,3 @@ type PluginAPIClient interface {
 	PluginSet(ctx context.Context, name string, args []string) error
 	PluginInspectWithRaw(ctx context.Context, name string) (*types.Plugin, []byte, error)
 }
-
-// Ensure that Client always implements APIClient.
-var _ APIClient = &Client{}

interface_stable.go

@@ -1,10 +1,9 @@
-// +build !experimental
-
 package client
 
 // APIClient is an interface that clients that talk with a docker server must implement.
 type APIClient interface {
 	CommonAPIClient
+	apiClientExperimental
 }
 
 // Ensure that Client always implements APIClient.

ping.go

@@ -0,0 +1,19 @@
+package client
+
+import "golang.org/x/net/context"
+
+// Ping pings the server and return the value of the "Docker-Experimental" header
+func (cli *Client) Ping(ctx context.Context) (bool, error) {
+	serverResp, err := cli.get(ctx, "/_ping", nil, nil)
+	if err != nil {
+		return false, err
+	}
+	defer ensureReaderClosed(serverResp)
+
+	exp := serverResp.header.Get("Docker-Experimental")
+	if exp != "true" {
+		return false, nil
+	}
+
+	return true, nil
+}

plugin_disable.go

@@ -1,5 +1,3 @@
-// +build experimental
-
 package client
 
 import (

plugin_disable_test.go

@@ -1,5 +1,3 @@
-// +build experimental
-
 package client
 
 import (

plugin_enable.go

@@ -1,5 +1,3 @@
-// +build experimental
-
 package client
 
 import (

plugin_enable_test.go

@@ -1,5 +1,3 @@
-// +build experimental
-
 package client
 
 import (

plugin_inspect.go

@@ -1,5 +1,3 @@
-// +build experimental
-
 package client
 
 import (

plugin_inspect_test.go

@@ -1,5 +1,3 @@
-// +build experimental
-
 package client
 
 import (

plugin_install.go

@@ -1,5 +1,3 @@
-// +build experimental
-
 package client
 
 import (

plugin_list.go

@@ -1,5 +1,3 @@
-// +build experimental
-
 package client
 
 import (

plugin_list_test.go

@@ -1,5 +1,3 @@
-// +build experimental
-
 package client
 
 import (

plugin_push.go

@@ -1,5 +1,3 @@
-// +build experimental
-
 package client
 
 import (

plugin_push_test.go

@@ -1,5 +1,3 @@
-// +build experimental
-
 package client
 
 import (

plugin_remove.go

@@ -1,5 +1,3 @@
-// +build experimental
-
 package client
 
 import (

plugin_remove_test.go

@@ -1,5 +1,3 @@
-// +build experimental
-
 package client
 
 import (

plugin_set.go

@@ -1,5 +1,3 @@
-// +build experimental
-
 package client
 
 import (

plugin_set_test.go

@@ -1,5 +1,3 @@
-// +build experimental
-
 package client
 
 import (