volumes: prune: add --all / -a option

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

cli/command/volume/prune.go

@@ -8,11 +8,15 @@ import (
 	"github.com/docker/cli/cli/command"
 	"github.com/docker/cli/cli/command/completion"
 	"github.com/docker/cli/opts"
+	"github.com/docker/docker/api/types/versions"
+	"github.com/docker/docker/errdefs"
 	units "github.com/docker/go-units"
+	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 )
 
 type pruneOptions struct {
+	all    bool
 	force  bool
 	filter opts.FilterOpt
 }
@@ -41,18 +45,37 @@ func NewPruneCommand(dockerCli command.Cli) *cobra.Command {
 	}
 
 	flags := cmd.Flags()
+	flags.BoolVarP(&options.all, "all", "a", false, "Remove all unused volumes, not just anonymous ones")
+	flags.SetAnnotation("all", "version", []string{"1.42"})
 	flags.BoolVarP(&options.force, "force", "f", false, "Do not prompt for confirmation")
 	flags.Var(&options.filter, "filter", `Provide filter values (e.g. "label=<label>")`)
 
 	return cmd
 }
 
-const warning = `WARNING! This will remove all local volumes not used by at least one container.
+const (
+	unusedVolumesWarning = `WARNING! This will remove anonymous local volumes not used by at least one container.
 Are you sure you want to continue?`
+	allVolumesWarning = `WARNING! This will remove all local volumes not used by at least one container.
+Are you sure you want to continue?`
+)
 
 func runPrune(dockerCli command.Cli, options pruneOptions) (spaceReclaimed uint64, output string, err error) {
 	pruneFilters := command.PruneFilters(dockerCli, options.filter.Value())
 
+	warning := unusedVolumesWarning
+	if versions.GreaterThanOrEqualTo(dockerCli.CurrentVersion(), "1.42") {
+		if options.all {
+			if pruneFilters.Contains("all") {
+				return 0, "", errdefs.InvalidParameter(errors.New("conflicting options: cannot specify both --all and --filter all=1"))
+			}
+			pruneFilters.Add("all", "true")
+			warning = allVolumesWarning
+		}
+	} else {
+		// API < v1.42 removes all volumes (anonymous and named) by default.
+		warning = allVolumesWarning
+	}
 	if !options.force && !command.PromptForConfirmation(dockerCli.In(), dockerCli.Out(), warning) {
 		return 0, "", nil
 	}

cli/command/volume/prune_test.go

@@ -13,22 +13,26 @@ import (
 	"github.com/docker/docker/api/types/filters"
 	"github.com/pkg/errors"
 	"gotest.tools/v3/assert"
+	is "gotest.tools/v3/assert/cmp"
 	"gotest.tools/v3/golden"
 	"gotest.tools/v3/skip"
 )
 
 func TestVolumePruneErrors(t *testing.T) {
 	testCases := []struct {
+		name            string
 		args            []string
 		flags           map[string]string
 		volumePruneFunc func(args filters.Args) (types.VolumesPruneReport, error)
 		expectedError   string
 	}{
 		{
+			name:          "accepts no arguments",
 			args:          []string{"foo"},
 			expectedError: "accepts no argument",
 		},
 		{
+			name: "forced but other error",
 			flags: map[string]string{
 				"force": "true",
 			},
@@ -37,8 +41,18 @@ func TestVolumePruneErrors(t *testing.T) {
 			},
 			expectedError: "error pruning volumes",
 		},
+		{
+			name: "conflicting options",
+			flags: map[string]string{
+				"all":    "true",
+				"filter": "all=1",
+			},
+			expectedError: "conflicting options: cannot specify both --all and --filter all=1",
+		},
 	}
 	for _, tc := range testCases {
+		tc := tc
+		t.Run(tc.name, func(t *testing.T) {
 			cmd := NewPruneCommand(
 				test.NewFakeCli(&fakeClient{
 					volumePruneFunc: tc.volumePruneFunc,
@@ -51,6 +65,51 @@ func TestVolumePruneErrors(t *testing.T) {
 			cmd.SetOut(io.Discard)
 			cmd.SetErr(io.Discard)
 			assert.ErrorContains(t, cmd.Execute(), tc.expectedError)
+		})
+	}
+}
+
+func TestVolumePruneSuccess(t *testing.T) {
+	testCases := []struct {
+		name            string
+		args            []string
+		volumePruneFunc func(args filters.Args) (types.VolumesPruneReport, error)
+	}{
+		{
+			name: "all",
+			args: []string{"--all"},
+			volumePruneFunc: func(pruneFilter filters.Args) (types.VolumesPruneReport, error) {
+				assert.Check(t, is.Equal([]string{"true"}, pruneFilter.Get("all")))
+				return types.VolumesPruneReport{}, nil
+			},
+		},
+		{
+			name: "all-forced",
+			args: []string{"--all", "--force"},
+			volumePruneFunc: func(pruneFilter filters.Args) (types.VolumesPruneReport, error) {
+				return types.VolumesPruneReport{}, nil
+			},
+		},
+		{
+			name: "label-filter",
+			args: []string{"--filter", "label=foobar"},
+			volumePruneFunc: func(pruneFilter filters.Args) (types.VolumesPruneReport, error) {
+				assert.Check(t, is.Equal([]string{"foobar"}, pruneFilter.Get("label")))
+				return types.VolumesPruneReport{}, nil
+			},
+		},
+	}
+	for _, tc := range testCases {
+		tc := tc
+		t.Run(tc.name, func(t *testing.T) {
+			cli := test.NewFakeCli(&fakeClient{volumePruneFunc: tc.volumePruneFunc})
+			cmd := NewPruneCommand(cli)
+			cmd.SetOut(io.Discard)
+			cmd.SetArgs(tc.args)
+			err := cmd.Execute()
+			assert.NilError(t, err)
+			golden.Assert(t, cli.OutBuffer().String(), fmt.Sprintf("volume-prune-success.%s.golden", tc.name))
+		})
 	}
 }
 

cli/command/volume/testdata/volume-prune-no.golden

@@ -1,2 +1,2 @@
-WARNING! This will remove all local volumes not used by at least one container.
+WARNING! This will remove anonymous local volumes not used by at least one container.
 Are you sure you want to continue? [y/N] Total reclaimed space: 0B

cli/command/volume/testdata/volume-prune-success.all-forced.golden

@@ -0,0 +1 @@
+Total reclaimed space: 0B

cli/command/volume/testdata/volume-prune-success.all.golden

@@ -0,0 +1,2 @@
+WARNING! This will remove all local volumes not used by at least one container.
+Are you sure you want to continue? [y/N] Total reclaimed space: 0B

cli/command/volume/testdata/volume-prune-success.label-filter.golden

@@ -0,0 +1,2 @@
+WARNING! This will remove anonymous local volumes not used by at least one container.
+Are you sure you want to continue? [y/N] Total reclaimed space: 0B

cli/command/volume/testdata/volume-prune-yes.golden

@@ -1,4 +1,4 @@
-WARNING! This will remove all local volumes not used by at least one container.
+WARNING! This will remove anonymous local volumes not used by at least one container.
 Are you sure you want to continue? [y/N] Deleted Volumes:
 foo
 bar

contrib/completion/bash/docker

@@ -5383,7 +5383,7 @@ _docker_volume_prune() {
 
 	case "$cur" in
 		-*)
-			COMPREPLY=( $( compgen -W "--filter --force -f --help" -- "$cur" ) )
+			COMPREPLY=( $( compgen -W "--all -a --filter --force -f --help" -- "$cur" ) )
 			;;
 	esac
 }

contrib/completion/zsh/_docker

@@ -2527,6 +2527,8 @@ __docker_volume_subcommand() {
         (prune)
             _arguments $(__docker_arguments) \
                 $opts_help \
+                "($help -a --all)"{-a,--all}"[Remove all unused local volumes, not just anonymous ones]" \
+                "($help)*--filter=[Filter values]:filter:__docker_complete_prune_filters" \
                 "($help -f --force)"{-f,--force}"[Do not prompt for confirmation]" && ret=0
             ;;
         (rm)

docs/reference/commandline/volume_prune.md

@@ -6,7 +6,8 @@ Remove all unused local volumes
 ### Options
 
 | Name                          | Type     | Default | Description                                        |
-|:----------------------|:---------|:--------|:---------------------------------------------|
+|:------------------------------|:---------|:--------|:---------------------------------------------------|
+| [`-a`](#all), [`--all`](#all) |          |         | Remove all unused volumes, not just anonymous ones |
 | [`--filter`](#filter)         | `filter` |         | Provide filter values (e.g. `label=<label>`)       |
 | `-f`, `--force`               |          |         | Do not prompt for confirmation                     |
 
@@ -15,14 +16,15 @@ Remove all unused local volumes
 
 ## Description
 
-Remove all unused local volumes. Unused local volumes are those which are not referenced by any containers
+Remove all unused local volumes. Unused local volumes are those which are not
+referenced by any containers. By default, it only removes anonymous volumes.
 
 ## Examples
 
 ```console
 $ docker volume prune
 
-WARNING! This will remove all local volumes not used by at least one container.
+WARNING! This will remove anonymous local volumes not used by at least one container.
 Are you sure you want to continue? [y/N] y
 Deleted Volumes:
 07c7bdf3e34ab76d921894c2b834f073721fccfbbcba792aa7648e3a7a664c2e
@@ -31,6 +33,10 @@ my-named-vol
 Total reclaimed space: 36 B
 ```
 
+### <a name="all"></a> Filtering (--all, -a)
+
+Use the `--all` flag to prune both unused anonymous and named volumes.
+
 ### <a name="filter"></a> Filtering (--filter)
 
 The filtering flag (`--filter`) format is of "key=value". If there is more