make `container` an explicit, required parameter

Signed-off-by: Nicolas De Loof <nicolas.deloof@gmail.com>

cli/command/container/attach.go

@@ -22,8 +22,6 @@ type AttachOptions struct {
 	NoStdin    bool
 	Proxy      bool
 	DetachKeys string
-
-	Container string
 }
 
 func inspectContainerAndCheckState(ctx context.Context, cli client.APIClient, args string) (*types.ContainerJSON, error) {
@@ -47,14 +45,15 @@ func inspectContainerAndCheckState(ctx context.Context, cli client.APIClient, ar
 // NewAttachCommand creates a new cobra.Command for `docker attach`
 func NewAttachCommand(dockerCli command.Cli) *cobra.Command {
 	var opts AttachOptions
+	var container string
 
 	cmd := &cobra.Command{
 		Use:   "attach [OPTIONS] CONTAINER",
 		Short: "Attach local standard input, output, and error streams to a running container",
 		Args:  cli.ExactArgs(1),
 		RunE: func(cmd *cobra.Command, args []string) error {
-			opts.Container = args[0]
+			container = args[0]
-			return RunAttach(context.Background(), dockerCli, &opts)
+			return RunAttach(context.Background(), dockerCli, container, &opts)
 		},
 		Annotations: map[string]string{
 			"aliases": "docker container attach, docker attach",
@@ -72,13 +71,13 @@ func NewAttachCommand(dockerCli command.Cli) *cobra.Command {
 }
 
 // RunAttach executes an `attach` command
-func RunAttach(ctx context.Context, dockerCli command.Cli, opts *AttachOptions) error {
+func RunAttach(ctx context.Context, dockerCli command.Cli, target string, opts *AttachOptions) error {
 	apiClient := dockerCli.Client()
 
 	// request channel to wait for client
-	resultC, errC := apiClient.ContainerWait(ctx, opts.Container, "")
+	resultC, errC := apiClient.ContainerWait(ctx, target, "")
 
-	c, err := inspectContainerAndCheckState(ctx, apiClient, opts.Container)
+	c, err := inspectContainerAndCheckState(ctx, apiClient, target)
 	if err != nil {
 		return err
 	}
@@ -107,11 +106,11 @@ func RunAttach(ctx context.Context, dockerCli command.Cli, opts *AttachOptions)
 
 	if opts.Proxy && !c.Config.Tty {
 		sigc := notifyAllSignals()
-		go ForwardAllSignals(ctx, dockerCli, opts.Container, sigc)
+		go ForwardAllSignals(ctx, dockerCli, target, sigc)
 		defer signal.StopCatch(sigc)
 	}
 
-	resp, errAttach := apiClient.ContainerAttach(ctx, opts.Container, options)
+	resp, errAttach := apiClient.ContainerAttach(ctx, target, options)
 	if errAttach != nil {
 		return errAttach
 	}
@@ -125,13 +124,13 @@ func RunAttach(ctx context.Context, dockerCli command.Cli, opts *AttachOptions)
 	// the container and not exit.
 	//
 	// Recheck the container's state to avoid attach block.
-	_, err = inspectContainerAndCheckState(ctx, apiClient, opts.Container)
+	_, err = inspectContainerAndCheckState(ctx, apiClient, target)
 	if err != nil {
 		return err
 	}
 
 	if c.Config.Tty && dockerCli.Out().IsTerminal() {
-		resizeTTY(ctx, dockerCli, opts.Container)
+		resizeTTY(ctx, dockerCli, target)
 	}
 
 	streamer := hijackedIOStreamer{

cli/command/container/exec.go

@@ -28,7 +28,6 @@ type ExecOptions struct {
 	Privileged  bool
 	Env         opts.ListOpts
 	Workdir     string
-	Container   string
 	Command     []string
 	EnvFile     opts.ListOpts
 }
@@ -44,15 +43,16 @@ func NewExecOptions() ExecOptions {
 // NewExecCommand creates a new cobra.Command for `docker exec`
 func NewExecCommand(dockerCli command.Cli) *cobra.Command {
 	options := NewExecOptions()
+	var container string
 
 	cmd := &cobra.Command{
 		Use:   "exec [OPTIONS] CONTAINER COMMAND [ARG...]",
 		Short: "Execute a command in a running container",
 		Args:  cli.RequiresMinArgs(2),
 		RunE: func(cmd *cobra.Command, args []string) error {
-			options.Container = args[0]
+			container = args[0]
 			options.Command = args[1:]
-			return RunExec(context.Background(), dockerCli, options)
+			return RunExec(context.Background(), dockerCli, container, options)
 		},
 		ValidArgsFunction: completion.ContainerNames(dockerCli, false, func(container types.Container) bool {
 			return container.State != "paused"
@@ -96,7 +96,7 @@ func NewExecCommand(dockerCli command.Cli) *cobra.Command {
 }
 
 // RunExec executes an `exec` command
-func RunExec(ctx context.Context, dockerCli command.Cli, options ExecOptions) error {
+func RunExec(ctx context.Context, dockerCli command.Cli, container string, options ExecOptions) error {
 	execConfig, err := parseExec(options, dockerCli.ConfigFile())
 	if err != nil {
 		return err
@@ -108,7 +108,7 @@ func RunExec(ctx context.Context, dockerCli command.Cli, options ExecOptions) er
 	// otherwise if we error out we will leak execIDs on the server (and
 	// there's no easy way to clean those up). But also in order to make "not
 	// exist" errors take precedence we do a dummy inspect first.
-	if _, err := client.ContainerInspect(ctx, options.Container); err != nil {
+	if _, err := client.ContainerInspect(ctx, container); err != nil {
 		return err
 	}
 	if !execConfig.Detach {
@@ -119,7 +119,7 @@ func RunExec(ctx context.Context, dockerCli command.Cli, options ExecOptions) er
 
 	fillConsoleSize(execConfig, dockerCli)
 
-	response, err := client.ContainerExecCreate(ctx, options.Container, *execConfig)
+	response, err := client.ContainerExecCreate(ctx, container, *execConfig)
 	if err != nil {
 		return err
 	}

cli/command/container/exec_test.go

@@ -169,7 +169,6 @@ func TestRunExec(t *testing.T) {
 		{
 			doc: "successful detach",
 			options: withDefaultOpts(ExecOptions{
-				Container: "thecontainer",
 				Detach: true,
 			}),
 			client: fakeClient{execCreateFunc: execCreateWithID},
@@ -195,7 +194,7 @@ func TestRunExec(t *testing.T) {
 		t.Run(testcase.doc, func(t *testing.T) {
 			cli := test.NewFakeCli(&testcase.client)
 
-			err := RunExec(context.Background(), cli, testcase.options)
+			err := RunExec(context.Background(), cli, "thecontainer", testcase.options)
 			if testcase.expectedError != "" {
 				assert.ErrorContains(t, err, testcase.expectedError)
 			} else {