commands: move snapshot command to separate pkg

command/commands.go

@@ -37,6 +37,7 @@ import (
 	"github.com/hashicorp/consul/command/reload"
 	"github.com/hashicorp/consul/command/rtt"
 	"github.com/hashicorp/consul/command/validate"
+	"github.com/hashicorp/consul/snapshot"
 	"github.com/hashicorp/consul/version"
 	"github.com/mitchellh/cli"
 )
@@ -187,9 +188,7 @@ func init() {
 		},
 
 		"snapshot": func() (cli.Command, error) {
-			return &SnapshotCommand{
-				UI: ui,
-			}, nil
+			return snapshot.New(), nil
 		},
 
 		"snapshot restore": func() (cli.Command, error) {

command/snapshot/snapshot_command.go

@@ -1,20 +1,24 @@
-package command
+package snapshot
 
 import (
 	"github.com/mitchellh/cli"
 )
 
-// SnapshotCommand is a Command implementation that just shows help for
-// the subcommands nested below it.
-type SnapshotCommand struct {
-	UI cli.Ui
+func New() *cmd {
+	return &cmd{}
 }
 
-func (c *SnapshotCommand) Run(args []string) int {
+type cmd struct{}
+
+func (c *cmd) Run(args []string) int {
 	return cli.RunResultHelp
 }
 
-func (c *SnapshotCommand) Help() string {
+func (c *cmd) Synopsis() string {
+	return "Saves, restores and inspects snapshots of Consul server state"
+}
+
+func (c *cmd) Help() string {
 	return `Usage: consul snapshot <subcommand> [options] [args]
 
   This command has subcommands for saving, restoring, and inspecting the state
@@ -45,7 +49,3 @@ func (c *SnapshotCommand) Help() string {
   For more examples, ask for subcommand help or view the documentation.
 `
 }
-
-func (c *SnapshotCommand) Synopsis() string {
-	return "Saves, restores and inspects snapshots of Consul server state"
-}

command/snapshot/snapshot_command_test.go

@@ -0,0 +1,13 @@
+package snapshot
+
+import (
+	"strings"
+	"testing"
+)
+
+func TestSnapshotCommand_noTabs(t *testing.T) {
+	t.Parallel()
+	if strings.ContainsRune(New().Help(), '\t') {
+		t.Fatal("usage has tabs")
+	}
+}

command/snapshot_command_test.go

@@ -1,17 +0,0 @@
-package command
-
-import (
-	"testing"
-
-	"github.com/mitchellh/cli"
-)
-
-func TestSnapshotCommand_implements(t *testing.T) {
-	t.Parallel()
-	var _ cli.Command = &SnapshotCommand{}
-}
-
-func TestSnapshotCommand_noTabs(t *testing.T) {
-	t.Parallel()
-	assertNoTabs(t, new(SnapshotCommand))
-}