feat: add uc CLI argument completion for machines, services, volumes (#309)

* Allow for argument completion

This shows for a single command on how to complete service names in the
cluster: `uc inspect <TAB>` will complete using ListServices

See: #307

Signed-off-by: Miek Gieben <miek@miek.nl>

* All cluster interactions can be completed

Signed-off-by: Miek Gieben <miek@miek.nl>

* Machines -m flag completion

Signed-off-by: Miek Gieben <miek@miek.nl>

* Add completion for "ctx use"

Signed-off-by: Miek Gieben <miek@miek.nl>

* Complete from compose file too

Signed-off-by: Miek Gieben <miek@miek.nl>

* Allow for argument completion

This shows for a single command on how to complete service names in the
cluster: `uc inspect <TAB>` will complete using ListServices

See: #307

Signed-off-by: Miek Gieben <miek@miek.nl>

* All cluster interactions can be completed

Signed-off-by: Miek Gieben <miek@miek.nl>

* Machines -m flag completion

Signed-off-by: Miek Gieben <miek@miek.nl>

* Add completion for "ctx use"

Signed-off-by: Miek Gieben <miek@miek.nl>

* Complete from compose file too

Signed-off-by: Miek Gieben <miek@miek.nl>

* Move to better place

Signed-off-by: Miek Gieben <miek@miek.nl>

* Adjust imports

Signed-off-by: Miek Gieben <miek@miek.nl>

* prefix match for context too

Signed-off-by: Miek Gieben <miek@miek.nl>

---------

Signed-off-by: Miek Gieben <miek@miek.nl>

cmd/uncloud/build.go

@@ -6,6 +6,7 @@ import (
 
 	composecli "github.com/compose-spec/compose-go/v2/cli"
 	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/internal/cli/completion"
 	"github.com/psviderski/uncloud/pkg/client/compose"
 	"github.com/spf13/cobra"
 )
@@ -50,6 +51,9 @@ to cluster machines or --push-registry to upload them to external registries.`,
 			return runBuild(cmd.Context(), uncli, opts)
 		},
 		GroupID: "service",
+		ValidArgsFunction: func(cmd *cobra.Command, args []string, toComplete string) ([]cobra.Completion, cobra.ShellCompDirective) {
+			return completion.ComposeServices(cmd.Context(), args, toComplete, opts.files, opts.profiles)
+		},
 	}
 
 	cmd.Flags().StringArrayVar(&opts.BuildArgs, "build-arg", nil,
@@ -76,6 +80,8 @@ to cluster machines or --push-registry to upload them to external registries.`,
 	cmd.Flags().BoolVar(&opts.PushRegistry, "push-registry", false,
 		"Upload the built images to external registries (e.g., Docker Hub) after building.")
 
+	completion.MachinesFlag(cmd)
+
 	return cmd
 }
 

cmd/uncloud/caddy/config.go

@@ -7,6 +7,7 @@ import (
 
 	"github.com/alecthomas/chroma/v2/quick"
 	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/internal/cli/completion"
 	"github.com/spf13/cobra"
 )
 
@@ -33,6 +34,8 @@ func NewConfigCommand() *cobra.Command {
 	cmd.Flags().BoolVar(&opts.noColor, "no-color", false,
 		"Disable syntax highlighting for the output.")
 
+	completion.MachinesFlag(cmd)
+
 	return cmd
 }
 

cmd/uncloud/caddy/deploy.go

@@ -13,6 +13,7 @@ import (
 	"github.com/docker/cli/cli/streams"
 	"github.com/docker/compose/v2/pkg/progress"
 	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/internal/cli/completion"
 	"github.com/psviderski/uncloud/internal/cli/tui"
 	"github.com/psviderski/uncloud/internal/machine/api/pb"
 	"github.com/psviderski/uncloud/pkg/api"
@@ -48,6 +49,8 @@ func NewDeployCommand() *cobra.Command {
 		"Machine names or IDs to deploy to. Can be specified multiple times or as a comma-separated "+
 			"list. (default is all machines)")
 
+	completion.MachinesFlag(cmd)
+
 	return cmd
 }
 

cmd/uncloud/context/use.go

@@ -7,6 +7,7 @@ import (
 
 	"charm.land/huh/v2"
 	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/internal/cli/completion"
 	"github.com/spf13/cobra"
 )
 
@@ -29,6 +30,13 @@ func NewUseCommand() *cobra.Command {
 
 			return selectContext(uncli)
 		},
+		ValidArgsFunction: func(cmd *cobra.Command, args []string, toComplete string) ([]cobra.Completion, cobra.ShellCompDirective) {
+			if len(args) > 0 {
+				return nil, cobra.ShellCompDirectiveNoFileComp
+			}
+			uncli := cmd.Context().Value("cli").(*cli.CLI)
+			return completion.Contexts(cmd.Context(), uncli, args, toComplete)
+		},
 	}
 
 	return cmd

cmd/uncloud/deploy.go

@@ -11,6 +11,7 @@ import (
 	"github.com/docker/compose/v2/pkg/progress"
 	"github.com/docker/docker/pkg/stringid"
 	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/internal/cli/completion"
 	"github.com/psviderski/uncloud/internal/cli/logs"
 	"github.com/psviderski/uncloud/internal/cli/tui"
 	"github.com/psviderski/uncloud/pkg/api"
@@ -48,6 +49,9 @@ func NewDeployCommand() *cobra.Command {
 			return runDeploy(cmd.Context(), uncli, opts)
 		},
 		GroupID: "service",
+		ValidArgsFunction: func(cmd *cobra.Command, args []string, toComplete string) ([]cobra.Completion, cobra.ShellCompDirective) {
+			return completion.ComposeServices(cmd.Context(), args, toComplete, opts.files, opts.profiles)
+		},
 	}
 
 	cmd.Flags().StringArrayVar(&opts.BuildServicesOptions.BuildArgs, "build-arg", nil,

cmd/uncloud/image/ls.go

@@ -16,6 +16,7 @@ import (
 	"github.com/docker/go-units"
 
 	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/internal/cli/completion"
 	"github.com/psviderski/uncloud/internal/cli/tui"
 	"github.com/psviderski/uncloud/pkg/api"
 	"github.com/spf13/cobra"
@@ -62,6 +63,8 @@ func NewListCommand() *cobra.Command {
 		"Filter images by machine name or ID. Can be specified multiple times or as a comma-separated list. "+
 			"(default is include all machines)")
 
+	completion.MachinesFlag(cmd)
+
 	return cmd
 }
 

cmd/uncloud/image/push.go

@@ -7,6 +7,7 @@ import (
 	"github.com/containerd/platforms"
 	"github.com/docker/compose/v2/pkg/progress"
 	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/internal/cli/completion"
 	"github.com/psviderski/uncloud/pkg/client"
 	"github.com/spf13/cobra"
 )
@@ -54,6 +55,8 @@ The image is uploaded to all cluster machines (default) or the specified machine
 			"Local Docker must be configured to use containerd image store to support multi-platform images.",
 	)
 
+	completion.MachinesFlag(cmd)
+
 	return cmd
 }
 

cmd/uncloud/machine/rm.go

@@ -14,6 +14,7 @@ import (
 	"github.com/docker/compose/v2/pkg/progress"
 	"github.com/docker/docker/api/types/container"
 	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/internal/cli/completion"
 	"github.com/psviderski/uncloud/internal/cli/tui"
 	"github.com/psviderski/uncloud/internal/machine/api/pb"
 	"github.com/psviderski/uncloud/pkg/api"
@@ -37,6 +38,13 @@ func NewRmCommand() *cobra.Command {
 			uncli := cmd.Context().Value("cli").(*cli.CLI)
 			return remove(cmd.Context(), uncli, args[0], opts)
 		},
+		ValidArgsFunction: func(cmd *cobra.Command, args []string, toComplete string) ([]cobra.Completion, cobra.ShellCompDirective) {
+			if len(args) > 0 {
+				return nil, cobra.ShellCompDirectiveNoFileComp
+			}
+			uncli := cmd.Context().Value("cli").(*cli.CLI)
+			return completion.Machines(cmd.Context(), uncli, args, toComplete)
+		},
 	}
 
 	cmd.Flags().BoolVarP(&opts.yes, "yes", "y", false,

cmd/uncloud/machine/update.go

@@ -7,6 +7,7 @@ import (
 	"strings"
 
 	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/internal/cli/completion"
 	"github.com/psviderski/uncloud/internal/machine/api/pb"
 	"github.com/psviderski/uncloud/internal/machine/network"
 	"github.com/spf13/cobra"
@@ -46,6 +47,13 @@ At least one flag must be specified to perform an update.`,
 			uncli := cmd.Context().Value("cli").(*cli.CLI)
 			return update(cmd.Context(), uncli, cmd, opts, args[0])
 		},
+		ValidArgsFunction: func(cmd *cobra.Command, args []string, toComplete string) ([]cobra.Completion, cobra.ShellCompDirective) {
+			if len(args) > 0 {
+				return nil, cobra.ShellCompDirectiveNoFileComp
+			}
+			uncli := cmd.Context().Value("cli").(*cli.CLI)
+			return completion.Machines(cmd.Context(), uncli, args, toComplete)
+		},
 	}
 
 	cmd.Flags().StringVar(

cmd/uncloud/service/exec.go

@@ -7,6 +7,7 @@ import (
 
 	"github.com/docker/cli/cli/streams"
 	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/internal/cli/completion"
 	"github.com/psviderski/uncloud/internal/cli/tui"
 	"github.com/psviderski/uncloud/pkg/api"
 	"github.com/spf13/cobra"
@@ -55,6 +56,13 @@ If the service has multiple replicas and no container ID is specified, the comma
 			return runExec(cmd.Context(), uncli, serviceName, command, opts)
 		},
 		GroupID: groupID,
+		ValidArgsFunction: func(cmd *cobra.Command, args []string, toComplete string) ([]cobra.Completion, cobra.ShellCompDirective) {
+			if len(args) > 0 {
+				return nil, cobra.ShellCompDirectiveNoFileComp
+			}
+			uncli := cmd.Context().Value("cli").(*cli.CLI)
+			return completion.Services(cmd.Context(), uncli, args, toComplete)
+		},
 	}
 
 	execCmd.Flags().BoolVarP(&opts.detach, "detach", "d", false, "Detached mode: run command in the background")

cmd/uncloud/service/inspect.go

@@ -9,6 +9,7 @@ import (
 	"github.com/docker/docker/pkg/stringid"
 	"github.com/docker/go-units"
 	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/internal/cli/completion"
 	"github.com/psviderski/uncloud/internal/cli/tui"
 	"github.com/psviderski/uncloud/pkg/api"
 	"github.com/spf13/cobra"
@@ -30,6 +31,13 @@ func NewInspectCommand(groupID string) *cobra.Command {
 			return inspect(cmd.Context(), uncli, opts)
 		},
 		GroupID: groupID,
+		ValidArgsFunction: func(cmd *cobra.Command, args []string, toComplete string) ([]cobra.Completion, cobra.ShellCompDirective) {
+			if len(args) > 0 {
+				return nil, cobra.ShellCompDirectiveNoFileComp
+			}
+			uncli := cmd.Context().Value("cli").(*cli.CLI)
+			return completion.Services(cmd.Context(), uncli, args, toComplete)
+		},
 	}
 	return cmd
 }

cmd/uncloud/service/logs.go

@@ -8,6 +8,7 @@ import (
 
 	mapset "github.com/deckarep/golang-set/v2"
 	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/internal/cli/completion"
 	"github.com/psviderski/uncloud/internal/cli/logs"
 	"github.com/psviderski/uncloud/internal/cli/tui"
 	"github.com/psviderski/uncloud/pkg/api"
@@ -61,12 +62,20 @@ If no services are specified, streams logs from all services defined in the Comp
 			return runLogs(cmd.Context(), uncli, args, options)
 		},
 		GroupID: groupID,
+		ValidArgsFunction: func(cmd *cobra.Command, args []string, toComplete string) ([]cobra.Completion, cobra.ShellCompDirective) {
+			uncli := cmd.Context().Value("cli").(*cli.CLI)
+			return completion.Services(cmd.Context(), uncli, args, toComplete)
+		},
 	}
 
 	cmd.Flags().StringSliceVar(&options.Files, "file", nil,
 		"One or more Compose files to load service names from when no services are specified. (default compose.yaml)")
 
 	cmd.Flags().AddFlagSet(logs.Flags(&options))
+	completion.MachinesFlag(cmd)
+
+	completion.MachinesFlag(cmd)
+
 	return cmd
 }
 

cmd/uncloud/service/rm.go

@@ -6,6 +6,7 @@ import (
 
 	"github.com/docker/compose/v2/pkg/progress"
 	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/internal/cli/completion"
 	"github.com/spf13/cobra"
 )
 
@@ -31,6 +32,10 @@ directives in image Dockerfiles) are automatically removed with their containers
 			return rm(cmd.Context(), uncli, opts)
 		},
 		GroupID: groupID,
+		ValidArgsFunction: func(cmd *cobra.Command, args []string, toComplete string) ([]cobra.Completion, cobra.ShellCompDirective) {
+			uncli := cmd.Context().Value("cli").(*cli.CLI)
+			return completion.Services(cmd.Context(), uncli, args, toComplete)
+		},
 	}
 	return cmd
 }

cmd/uncloud/service/run.go

@@ -11,6 +11,7 @@ import (
 	"github.com/docker/docker/daemon/names"
 	"github.com/docker/go-units"
 	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/internal/cli/completion"
 	"github.com/psviderski/uncloud/internal/secret"
 	"github.com/psviderski/uncloud/pkg/api"
 	"github.com/psviderski/uncloud/pkg/client/deploy"
@@ -124,6 +125,8 @@ func NewRunCommand(groupID string) *cobra.Command {
 			"  -v /data/uploads:/app/uploads         	 Bind mount /data/uploads host directory to /app/uploads in container\n"+
 			"  -v /host/path:/container/path:ro 		 Bind mount a host directory or file as read-only")
 
+	completion.MachinesFlag(cmd)
+
 	return cmd
 }
 

cmd/uncloud/service/scale.go

@@ -11,6 +11,7 @@ import (
 	"charm.land/lipgloss/v2"
 	"github.com/docker/compose/v2/pkg/progress"
 	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/internal/cli/completion"
 	"github.com/psviderski/uncloud/internal/cli/tui"
 	"github.com/psviderski/uncloud/pkg/api"
 	"github.com/spf13/cobra"
@@ -44,6 +45,13 @@ func NewScaleCommand(groupID string) *cobra.Command {
 			return scale(cmd.Context(), uncli, opts)
 		},
 		GroupID: groupID,
+		ValidArgsFunction: func(cmd *cobra.Command, args []string, toComplete string) ([]cobra.Completion, cobra.ShellCompDirective) {
+			if len(args) > 0 {
+				return nil, cobra.ShellCompDirectiveNoFileComp
+			}
+			uncli := cmd.Context().Value("cli").(*cli.CLI)
+			return completion.Services(cmd.Context(), uncli, args, toComplete)
+		},
 	}
 
 	cmd.Flags().BoolVarP(&opts.yes, "yes", "y", false,

cmd/uncloud/service/start.go

@@ -7,6 +7,7 @@ import (
 
 	"github.com/docker/compose/v2/pkg/progress"
 	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/internal/cli/completion"
 	"github.com/spf13/cobra"
 )
 
@@ -30,6 +31,10 @@ Services can be specified by name or ID.`,
 			return start(cmd.Context(), uncli, opts)
 		},
 		GroupID: groupID,
+		ValidArgsFunction: func(cmd *cobra.Command, args []string, toComplete string) ([]cobra.Completion, cobra.ShellCompDirective) {
+			uncli := cmd.Context().Value("cli").(*cli.CLI)
+			return completion.Services(cmd.Context(), uncli, args, toComplete)
+		},
 	}
 	return cmd
 }

cmd/uncloud/service/stop.go

@@ -8,6 +8,7 @@ import (
 	"github.com/docker/compose/v2/pkg/progress"
 	"github.com/docker/docker/api/types/container"
 	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/internal/cli/completion"
 	"github.com/spf13/cobra"
 )
 
@@ -33,6 +34,10 @@ Services can be specified by name or ID. Stopped services can be restarted with
 			return stop(cmd.Context(), uncli, opts)
 		},
 		GroupID: groupID,
+		ValidArgsFunction: func(cmd *cobra.Command, args []string, toComplete string) ([]cobra.Completion, cobra.ShellCompDirective) {
+			uncli := cmd.Context().Value("cli").(*cli.CLI)
+			return completion.Services(cmd.Context(), uncli, args, toComplete)
+		},
 	}
 	cmd.Flags().StringVarP(&opts.signal, "signal", "s", "",
 		"Signal to send to each container's main process.\n"+

cmd/uncloud/volume/create.go

@@ -9,6 +9,7 @@ import (
 	"charm.land/huh/v2"
 	"github.com/docker/docker/api/types/volume"
 	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/internal/cli/completion"
 	"github.com/psviderski/uncloud/internal/machine/api/pb"
 	"github.com/psviderski/uncloud/pkg/api"
 	"github.com/spf13/cobra"
@@ -50,6 +51,8 @@ func NewCreateCommand() *cobra.Command {
 	cmd.Flags().StringVarP(&opts.machine, "machine", "m", "",
 		"Name or ID of the machine to create the volume on.")
 
+	completion.MachinesFlag(cmd)
+
 	return cmd
 }
 

cmd/uncloud/volume/inspect.go

@@ -7,6 +7,7 @@ import (
 	"fmt"
 
 	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/internal/cli/completion"
 	"github.com/psviderski/uncloud/pkg/api"
 	"github.com/spf13/cobra"
 )
@@ -26,12 +27,21 @@ func NewInspectCommand() *cobra.Command {
 			uncli := cmd.Context().Value("cli").(*cli.CLI)
 			return inspect(cmd.Context(), uncli, args[0], opts)
 		},
+		ValidArgsFunction: func(cmd *cobra.Command, args []string, toComplete string) ([]cobra.Completion, cobra.ShellCompDirective) {
+			if len(args) > 0 {
+				return nil, cobra.ShellCompDirectiveNoFileComp
+			}
+			uncli := cmd.Context().Value("cli").(*cli.CLI)
+			return completion.Volumes(cmd.Context(), uncli, args, toComplete)
+		},
 	}
 
 	cmd.Flags().StringVarP(&opts.machine, "machine", "m", "",
 		"Name or ID of the machine where the volume is located. "+
 			"If not specified, the volume will be searched across all machines.")
 
+	completion.MachinesFlag(cmd)
+
 	return cmd
 }
 

cmd/uncloud/volume/ls.go

@@ -7,6 +7,7 @@ import (
 	"strings"
 
 	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/internal/cli/completion"
 	"github.com/psviderski/uncloud/internal/cli/tui"
 	"github.com/psviderski/uncloud/pkg/api"
 	"github.com/spf13/cobra"
@@ -36,6 +37,8 @@ func NewListCommand() *cobra.Command {
 	cmd.Flags().BoolVarP(&opts.quiet, "quiet", "q", false,
 		"Only display volume names.")
 
+	completion.MachinesFlag(cmd)
+
 	return cmd
 }
 

cmd/uncloud/volume/rm.go

@@ -6,6 +6,7 @@ import (
 	"fmt"
 
 	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/internal/cli/completion"
 	"github.com/psviderski/uncloud/internal/cli/tui"
 	"github.com/psviderski/uncloud/pkg/api"
 	"github.com/spf13/cobra"
@@ -30,6 +31,10 @@ func NewRemoveCommand() *cobra.Command {
 			uncli := cmd.Context().Value("cli").(*cli.CLI)
 			return remove(cmd.Context(), uncli, args, opts)
 		},
+		ValidArgsFunction: func(cmd *cobra.Command, args []string, toComplete string) ([]cobra.Completion, cobra.ShellCompDirective) {
+			uncli := cmd.Context().Value("cli").(*cli.CLI)
+			return completion.Volumes(cmd.Context(), uncli, args, toComplete)
+		},
 	}
 
 	cmd.Flags().BoolVarP(&opts.force, "force", "f", false,
@@ -41,6 +46,8 @@ func NewRemoveCommand() *cobra.Command {
 	cmd.Flags().BoolVarP(&opts.yes, "yes", "y", false,
 		"Do not prompt for confirmation before removing the volume(s).")
 
+	completion.MachinesFlag(cmd)
+
 	return cmd
 }
 

cmd/uncloud/wg/wg.go

@@ -8,6 +8,7 @@ import (
 
 	"github.com/docker/go-units"
 	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/internal/cli/completion"
 	"github.com/psviderski/uncloud/internal/cli/tui"
 	"github.com/psviderski/uncloud/internal/machine/api/pb"
 	"github.com/spf13/cobra"
@@ -44,6 +45,9 @@ func newShowCommand() *cobra.Command {
 	}
 	cmd.Flags().StringVarP(&opts.machine, "machine", "m", "",
 		"Name or ID of the machine to show the configuration for. (default is connected machine)")
+
+	completion.MachinesFlag(cmd)
+
 	return cmd
 }
 

internal/cli/completion/compose.go

@@ -0,0 +1,30 @@
+package completion
+
+import (
+	"context"
+	"slices"
+	"strings"
+
+	composecli "github.com/compose-spec/compose-go/v2/cli"
+	"github.com/psviderski/uncloud/pkg/client/compose"
+	"github.com/spf13/cobra"
+)
+
+func ComposeServices(ctx context.Context, args []string, toComplete string, files, profiles []string) ([]cobra.Completion, cobra.ShellCompDirective) {
+	project, err := compose.LoadProject(ctx, files, composecli.WithDefaultProfiles(profiles...))
+	if err != nil {
+		return nil, cobra.ShellCompDirectiveError
+	}
+
+	services := project.ServiceNames()
+	names := []cobra.Completion{}
+	for _, service := range services {
+		if slices.Contains(args, service) {
+			continue
+		}
+		if strings.HasPrefix(service, toComplete) {
+			names = append(names, service)
+		}
+	}
+	return names, cobra.ShellCompDirectiveNoFileComp
+}

internal/cli/completion/context.go

@@ -0,0 +1,28 @@
+package completion
+
+import (
+	"context"
+	"maps"
+	"slices"
+	"strings"
+
+	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/spf13/cobra"
+)
+
+func Contexts(ctx context.Context, uncli *cli.CLI, args []string, toComplete string) ([]cobra.Completion, cobra.ShellCompDirective) {
+	contexts := slices.Sorted(maps.Keys(uncli.Config.Contexts))
+
+	names := []cobra.Completion{}
+	for _, context := range contexts {
+		if slices.Contains(args, context) {
+			continue
+		}
+		if strings.HasPrefix(context, toComplete) {
+			names = append(names, context)
+		}
+		names = append(names, context)
+	}
+
+	return names, cobra.ShellCompDirectiveNoFileComp
+}

internal/cli/completion/machine.go

@@ -0,0 +1,41 @@
+package completion
+
+import (
+	"context"
+	"slices"
+	"strings"
+
+	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/spf13/cobra"
+)
+
+func Machines(ctx context.Context, uncli *cli.CLI, args []string, toComplete string) ([]cobra.Completion, cobra.ShellCompDirective) {
+	client, err := uncli.ConnectCluster(ctx)
+	if err != nil {
+		return nil, cobra.ShellCompDirectiveError
+	}
+	defer client.Close()
+
+	machines, err := client.ListMachines(ctx, nil)
+	if err != nil {
+		return nil, cobra.ShellCompDirectiveError
+	}
+	names := []cobra.Completion{}
+	for _, machine := range machines {
+		if slices.Contains(args, machine.Machine.Name) {
+			continue
+		}
+		if strings.HasPrefix(machine.Machine.Name, toComplete) {
+			names = append(names, machine.Machine.Name)
+		}
+	}
+	return names, cobra.ShellCompDirectiveNoFileComp
+}
+
+func MachinesFlag(cmd *cobra.Command) {
+	cmd.RegisterFlagCompletionFunc("machine",
+		func(cmd *cobra.Command, args []string, toComplete string) ([]cobra.Completion, cobra.ShellCompDirective) {
+			uncli := cmd.Context().Value("cli").(*cli.CLI)
+			return Machines(cmd.Context(), uncli, args, toComplete)
+		})
+}

internal/cli/completion/service.go

@@ -0,0 +1,34 @@
+// Package completion implements completion functions for the uc cli.
+package completion
+
+import (
+	"context"
+	"slices"
+	"strings"
+
+	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/spf13/cobra"
+)
+
+func Services(ctx context.Context, uncli *cli.CLI, args []string, toComplete string) ([]cobra.Completion, cobra.ShellCompDirective) {
+	client, err := uncli.ConnectCluster(ctx)
+	if err != nil {
+		return nil, cobra.ShellCompDirectiveError
+	}
+	defer client.Close()
+
+	services, err := client.ListServices(ctx)
+	if err != nil {
+		return nil, cobra.ShellCompDirectiveError
+	}
+	names := []cobra.Completion{}
+	for _, service := range services {
+		if slices.Contains(args, service.Name) {
+			continue
+		}
+		if strings.HasPrefix(service.Name, toComplete) {
+			names = append(names, service.Name)
+		}
+	}
+	return names, cobra.ShellCompDirectiveNoFileComp
+}

internal/cli/completion/volume.go

@@ -0,0 +1,34 @@
+package completion
+
+import (
+	"context"
+	"slices"
+	"strings"
+
+	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/pkg/api"
+	"github.com/spf13/cobra"
+)
+
+func Volumes(ctx context.Context, uncli *cli.CLI, args []string, toComplete string) ([]cobra.Completion, cobra.ShellCompDirective) {
+	client, err := uncli.ConnectCluster(ctx)
+	if err != nil {
+		return nil, cobra.ShellCompDirectiveError
+	}
+	defer client.Close()
+
+	volumes, err := client.ListVolumes(ctx, &api.VolumeFilter{})
+	if err != nil {
+		return nil, cobra.ShellCompDirectiveError
+	}
+	names := []cobra.Completion{}
+	for _, volume := range volumes {
+		if slices.Contains(args, volume.Volume.Name) {
+			continue
+		}
+		if strings.HasPrefix(volume.Volume.Name, toComplete) {
+			names = append(names, volume.Volume.Name)
+		}
+	}
+	return names, cobra.ShellCompDirectiveNoFileComp
+}