Merge 3eaad535b3 into 062eecf14a

cli/command/system/client_test.go

@@ -19,6 +19,7 @@ type fakeClient struct {
 	eventsFn           func(context.Context, events.ListOptions) (<-chan events.Message, <-chan error)
 	containerPruneFunc func(ctx context.Context, pruneFilters filters.Args) (container.PruneReport, error)
 	networkPruneFunc   func(ctx context.Context, pruneFilter filters.Args) (network.PruneReport, error)
+	containerListFunc  func(context.Context, container.ListOptions) ([]container.Summary, error)
 }
 
 func (cli *fakeClient) ServerVersion(ctx context.Context) (types.Version, error) {
@@ -46,3 +47,10 @@ func (cli *fakeClient) NetworksPrune(ctx context.Context, pruneFilter filters.Ar
 	}
 	return network.PruneReport{}, nil
 }
+
+func (cli *fakeClient) ContainerList(ctx context.Context, options container.ListOptions) ([]container.Summary, error) {
+	if cli.containerListFunc != nil {
+		return cli.containerListFunc(ctx, options)
+	}
+	return []container.Summary{}, nil
+}

cli/command/system/completion.go

@@ -0,0 +1,241 @@
+package system
+
+import (
+	"strings"
+
+	"github.com/docker/docker/api/types"
+	"github.com/docker/docker/api/types/image"
+	"github.com/docker/docker/api/types/network"
+	"github.com/docker/docker/api/types/volume"
+
+	"github.com/docker/docker/api/types/events"
+
+	"github.com/docker/cli/cli/command/completion"
+	"github.com/spf13/cobra"
+)
+
+var (
+	eventFilters = []string{"container", "daemon", "event", "image", "label", "network", "node", "scope", "type", "volume"}
+
+	// eventTypes is a list of all event types.
+	// This should be moved to the moby codebase once its usage is consolidated here.
+	eventTypes = []events.Type{
+		events.BuilderEventType,
+		events.ConfigEventType,
+		events.ContainerEventType,
+		events.DaemonEventType,
+		events.ImageEventType,
+		events.NetworkEventType,
+		events.NodeEventType,
+		events.PluginEventType,
+		events.SecretEventType,
+		events.ServiceEventType,
+		events.VolumeEventType,
+	}
+
+	// eventActions is a list of all event actions.
+	// This should be moved to the moby codebase once its usage is consolidated here.
+	eventActions = []events.Action{
+		events.ActionCreate,
+		events.ActionStart,
+		events.ActionRestart,
+		events.ActionStop,
+		events.ActionCheckpoint,
+		events.ActionPause,
+		events.ActionUnPause,
+		events.ActionAttach,
+		events.ActionDetach,
+		events.ActionResize,
+		events.ActionUpdate,
+		events.ActionRename,
+		events.ActionKill,
+		events.ActionDie,
+		events.ActionOOM,
+		events.ActionDestroy,
+		events.ActionRemove,
+		events.ActionCommit,
+		events.ActionTop,
+		events.ActionCopy,
+		events.ActionArchivePath,
+		events.ActionExtractToDir,
+		events.ActionExport,
+		events.ActionImport,
+		events.ActionSave,
+		events.ActionLoad,
+		events.ActionTag,
+		events.ActionUnTag,
+		events.ActionPush,
+		events.ActionPull,
+		events.ActionPrune,
+		events.ActionDelete,
+		events.ActionEnable,
+		events.ActionDisable,
+		events.ActionConnect,
+		events.ActionDisconnect,
+		events.ActionReload,
+		events.ActionMount,
+		events.ActionUnmount,
+		events.ActionExecCreate,
+		events.ActionExecStart,
+		events.ActionExecDie,
+		events.ActionExecDetach,
+		events.ActionHealthStatus,
+		events.ActionHealthStatusRunning,
+		events.ActionHealthStatusHealthy,
+		events.ActionHealthStatusUnhealthy,
+	}
+)
+
+// completeFilters provides completion for the filters that can be used with `--filter`.
+func completeFilters(dockerCLI completion.APIClientProvider) completion.ValidArgsFn {
+	return func(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
+		if strings.HasPrefix(toComplete, "container=") {
+			return prefixWith("container=", containerNames(dockerCLI, cmd, args, toComplete)), cobra.ShellCompDirectiveNoFileComp
+		}
+		if strings.HasPrefix(toComplete, "daemon=") {
+			return prefixWith("daemon=", daemonNames(dockerCLI, cmd)), cobra.ShellCompDirectiveNoFileComp
+		}
+		if strings.HasPrefix(toComplete, "event=") {
+			return prefixWith("event=", validEventNames()), cobra.ShellCompDirectiveNoFileComp
+		}
+		if strings.HasPrefix(toComplete, "image=") {
+			return prefixWith("image=", imageNames(dockerCLI, cmd)), cobra.ShellCompDirectiveNoFileComp
+		}
+		if strings.HasPrefix(toComplete, "label=") {
+			return nil, cobra.ShellCompDirectiveNoFileComp
+		}
+		if strings.HasPrefix(toComplete, "network=") {
+			return prefixWith("network=", networkNames(dockerCLI, cmd)), cobra.ShellCompDirectiveNoFileComp
+		}
+		if strings.HasPrefix(toComplete, "node=") {
+			return prefixWith("node=", nodeNames(dockerCLI, cmd)), cobra.ShellCompDirectiveNoFileComp
+		}
+		if strings.HasPrefix(toComplete, "scope=") {
+			return prefixWith("scope=", []string{"local", "swarm"}), cobra.ShellCompDirectiveNoFileComp
+		}
+		if strings.HasPrefix(toComplete, "type=") {
+			return prefixWith("type=", eventTypeNames()), cobra.ShellCompDirectiveNoFileComp
+		}
+		if strings.HasPrefix(toComplete, "volume=") {
+			return prefixWith("volume=", volumeNames(dockerCLI, cmd)), cobra.ShellCompDirectiveNoFileComp
+		}
+
+		return postfixWith("=", eventFilters), cobra.ShellCompDirectiveNoSpace
+	}
+}
+
+func prefixWith(prefix string, values []string) []string {
+	result := make([]string, len(values))
+	for i, v := range values {
+		result[i] = prefix + v
+	}
+	return result
+}
+
+func postfixWith(postfix string, values []string) []string {
+	result := make([]string, len(values))
+	for i, v := range values {
+		result[i] = v + postfix
+	}
+	return result
+}
+
+// eventTypeNames provides a list of all event types.
+// The list is derived from eventTypes.
+func eventTypeNames() []string {
+	names := make([]string, len(eventTypes))
+	for i, eventType := range eventTypes {
+		names[i] = string(eventType)
+	}
+	return names
+}
+
+// validEventNames provides a list of all event actions.
+// The list is derived from eventActions.
+// Actions that are not suitable for usage in completions are removed.
+func validEventNames() []string {
+	names := []string{}
+	for _, eventAction := range eventActions {
+		if strings.Contains(string(eventAction), " ") {
+			continue
+		}
+		names = append(names, string(eventAction))
+	}
+	return names
+}
+
+// containerNames contacts the API to get names and optionally IDs of containers.
+// In case of an error, an empty list is returned.
+func containerNames(dockerCLI completion.APIClientProvider, cmd *cobra.Command, args []string, toComplete string) []string {
+	names, _ := completion.ContainerNames(dockerCLI, true)(cmd, args, toComplete)
+	if names == nil {
+		return []string{}
+	}
+	return names
+}
+
+// daemonNames contacts the API to get name and ID of the current docker daemon.
+// In case of an error, an empty list is returned.
+func daemonNames(dockerCLI completion.APIClientProvider, cmd *cobra.Command) []string {
+	info, err := dockerCLI.Client().Info(cmd.Context())
+	if err != nil {
+		return []string{}
+	}
+	return []string{info.Name, info.ID}
+}
+
+// imageNames contacts the API to get a list of image names.
+// In case of an error, an empty list is returned.
+func imageNames(dockerCLI completion.APIClientProvider, cmd *cobra.Command) []string {
+	list, err := dockerCLI.Client().ImageList(cmd.Context(), image.ListOptions{})
+	if err != nil {
+		return []string{}
+	}
+	names := []string{}
+	for _, img := range list {
+		names = append(names, img.RepoTags...)
+	}
+	return names
+}
+
+// networkNames contacts the API to get a list of network names.
+// In case of an error, an empty list is returned.
+func networkNames(dockerCLI completion.APIClientProvider, cmd *cobra.Command) []string {
+	list, err := dockerCLI.Client().NetworkList(cmd.Context(), network.ListOptions{})
+	if err != nil {
+		return []string{}
+	}
+	names := []string{}
+	for _, nw := range list {
+		names = append(names, nw.Name)
+	}
+	return names
+}
+
+// nodeNames contacts the API to get a list of node names.
+// In case of an error, an empty list is returned.
+func nodeNames(dockerCLI completion.APIClientProvider, cmd *cobra.Command) []string {
+	list, err := dockerCLI.Client().NodeList(cmd.Context(), types.NodeListOptions{})
+	if err != nil {
+		return []string{}
+	}
+	names := []string{}
+	for _, node := range list {
+		names = append(names, node.Description.Hostname)
+	}
+	return names
+}
+
+// volumeNames contacts the API to get a list of volume names.
+// In case of an error, an empty list is returned.
+func volumeNames(dockerCLI completion.APIClientProvider, cmd *cobra.Command) []string {
+	list, err := dockerCLI.Client().VolumeList(cmd.Context(), volume.ListOptions{})
+	if err != nil {
+		return []string{}
+	}
+	names := []string{}
+	for _, v := range list.Volumes {
+		names = append(names, v.Name)
+	}
+	return names
+}

cli/command/system/completion_test.go

@@ -0,0 +1,45 @@
+package system
+
+import (
+	"context"
+	"errors"
+	"testing"
+
+	"github.com/docker/cli/internal/test"
+	"github.com/docker/cli/internal/test/builders"
+	"github.com/docker/docker/api/types/container"
+	"github.com/spf13/cobra"
+	"gotest.tools/v3/assert"
+)
+
+// Successful completion lists all container names, prefixed with "container=".
+// Filtering the completions by the current word is delegated to the completion script.
+func TestCompleteEventFilterContainer(t *testing.T) {
+	cli := test.NewFakeCli(&fakeClient{
+		containerListFunc: func(_ context.Context, _ container.ListOptions) ([]container.Summary, error) {
+			return []container.Summary{
+				*builders.Container("foo"),
+				*builders.Container("bar"),
+			}, nil
+		},
+	})
+
+	completions, directive := completeFilters(cli)(NewEventsCommand(cli), nil, "container=")
+
+	assert.DeepEqual(t, completions, []string{"container=foo", "container=bar"})
+	assert.Equal(t, directive, cobra.ShellCompDirectiveNoFileComp)
+}
+
+// In case of API errors, no completions are returned.
+func TestCompleteEventFilterContainerAPIError(t *testing.T) {
+	cli := test.NewFakeCli(&fakeClient{
+		containerListFunc: func(_ context.Context, _ container.ListOptions) ([]container.Summary, error) {
+			return nil, errors.New("API error")
+		},
+	})
+
+	completions, directive := completeFilters(cli)(NewEventsCommand(cli), nil, "container=")
+
+	assert.DeepEqual(t, completions, []string{})
+	assert.Equal(t, directive, cobra.ShellCompDirectiveNoFileComp)
+}

cli/command/system/events.go

@@ -50,6 +50,8 @@ func NewEventsCommand(dockerCli command.Cli) *cobra.Command {
 	flags.VarP(&options.filter, "filter", "f", "Filter output based on conditions provided")
 	flags.StringVar(&options.format, "format", "", flagsHelper.InspectFormatHelp) // using the same flag description as "inspect" commands for now.
 
+	_ = cmd.RegisterFlagCompletionFunc("filter", completeFilters(dockerCli))
+
 	return cmd
 }