V2 podman image prune

* Fixed header for `podman image ls`
* Implemented prune `all` flag, preserved filter method for backwards
  capability
* Updated binding tests

Signed-off-by: Jhon Honce <jhonce@redhat.com>

cmd/podmanV2/images/images.go

@@ -15,7 +15,7 @@ var (
 		Args:    listCmd.Args,
 		Short:   listCmd.Short,
 		Long:    listCmd.Long,
-		PreRunE: listCmd.PreRunE,
+		PreRunE: preRunE,
 		RunE:    listCmd.RunE,
 		Example: strings.Replace(listCmd.Example, "podman image list", "podman images", -1),
 	}

cmd/podmanV2/images/list.go

@@ -212,7 +212,7 @@ func imageListFormat(flags listFlagType) (string, string) {
 		row += "\t{{.Digest}}"
 	}
 
-	hdr += "\tID"
+	hdr += "\tIMAGE ID"
 	if flags.noTrunc {
 		row += "\tsha256:{{.ID}}"
 	} else {

cmd/podmanV2/images/prune.go

@@ -0,0 +1,86 @@
+package images
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"strings"
+
+	"github.com/containers/libpod/cmd/podmanV2/registry"
+	"github.com/containers/libpod/pkg/domain/entities"
+	"github.com/pkg/errors"
+	"github.com/spf13/cobra"
+)
+
+var (
+	pruneDescription = `Removes all unnamed images from local storage.
+
+  If an image is not being used by a container, it will be removed from the system.`
+	pruneCmd = &cobra.Command{
+		Use:     "prune",
+		Args:    cobra.NoArgs,
+		Short:   "Remove unused images",
+		Long:    pruneDescription,
+		RunE:    prune,
+		Example: `podman image prune`,
+	}
+
+	pruneOpts = entities.ImagePruneOptions{}
+	force     bool
+	filter    = []string{}
+)
+
+func init() {
+	registry.Commands = append(registry.Commands, registry.CliCommand{
+		Mode:    []entities.EngineMode{entities.ABIMode, entities.TunnelMode},
+		Command: pruneCmd,
+		Parent:  imageCmd,
+	})
+
+	flags := pruneCmd.Flags()
+	flags.BoolVarP(&pruneOpts.All, "all", "a", false, "Remove all unused images, not just dangling ones")
+	flags.BoolVarP(&force, "force", "f", false, "Do not prompt for confirmation")
+	flags.StringArrayVar(&filter, "filter", []string{}, "Provide filter values (e.g. 'label=<key>=<value>')")
+
+}
+
+func prune(cmd *cobra.Command, args []string) error {
+	if !force {
+		reader := bufio.NewReader(os.Stdin)
+		fmt.Printf(`
+WARNING! This will remove all dangling images.
+Are you sure you want to continue? [y/N] `)
+		answer, err := reader.ReadString('\n')
+		if err != nil {
+			return errors.Wrapf(err, "error reading input")
+		}
+		if strings.ToLower(answer)[0] != 'y' {
+			return nil
+		}
+	}
+
+	// TODO Remove once filter refactor is finished and url.Values rules :)
+	for _, f := range filter {
+		t := strings.SplitN(f, "=", 2)
+		pruneOpts.Filters.Add(t[0], t[1])
+	}
+
+	results, err := registry.ImageEngine().Prune(registry.GetContext(), pruneOpts)
+	if err != nil {
+		return err
+	}
+
+	for _, i := range results.Report.Id {
+		fmt.Println(i)
+	}
+
+	for _, e := range results.Report.Err {
+		fmt.Fprint(os.Stderr, e.Error()+"\n")
+	}
+
+	if results.Size > 0 {
+		fmt.Fprintf(os.Stdout, "Size: %d\n", results.Size)
+	}
+
+	return nil
+}

pkg/api/handlers/compat/images.go

@@ -64,6 +64,7 @@ func PruneImages(w http.ResponseWriter, r *http.Request) {
 	runtime := r.Context().Value("runtime").(*libpod.Runtime)
 
 	query := struct {
+		All     bool
 		Filters map[string][]string `schema:"filters"`
 	}{
 		// This is where you can override the golang default value for one of fields
@@ -80,7 +81,7 @@ func PruneImages(w http.ResponseWriter, r *http.Request) {
 			filters = append(filters, fmt.Sprintf("%s=%s", k, val))
 		}
 	}
-	pruneCids, err := runtime.ImageRuntime().PruneImages(r.Context(), false, filters)
+	pruneCids, err := runtime.ImageRuntime().PruneImages(r.Context(), query.All, filters)
 	if err != nil {
 		utils.InternalServerError(w, err)
 		return

pkg/api/handlers/libpod/images.go

@@ -119,12 +119,12 @@ func GetImages(w http.ResponseWriter, r *http.Request) {
 
 func PruneImages(w http.ResponseWriter, r *http.Request) {
 	var (
-		all bool
 		err error
 	)
 	runtime := r.Context().Value("runtime").(*libpod.Runtime)
 	decoder := r.Context().Value("decoder").(*schema.Decoder)
 	query := struct {
+		All     bool                `schema:"all"`
 		Filters map[string][]string `schema:"filters"`
 	}{
 		// override any golang type defaults
@@ -140,7 +140,7 @@ func PruneImages(w http.ResponseWriter, r *http.Request) {
 	if _, found := r.URL.Query()["filters"]; found {
 		dangling := query.Filters["all"]
 		if len(dangling) > 0 {
-			all, err = strconv.ParseBool(query.Filters["all"][0])
+			query.All, err = strconv.ParseBool(query.Filters["all"][0])
 			if err != nil {
 				utils.InternalServerError(w, err)
 				return
@@ -152,7 +152,8 @@ func PruneImages(w http.ResponseWriter, r *http.Request) {
 			libpodFilters = append(libpodFilters, fmt.Sprintf("%s=%s", k, v[0]))
 		}
 	}
-	cids, err := runtime.ImageRuntime().PruneImages(r.Context(), all, libpodFilters)
+
+	cids, err := runtime.ImageRuntime().PruneImages(r.Context(), query.All, libpodFilters)
 	if err != nil {
 		utils.Error(w, "Something went wrong.", http.StatusInternalServerError, err)
 		return

pkg/bindings/images/images.go

@@ -154,7 +154,7 @@ func Export(ctx context.Context, nameOrID string, w io.Writer, format *string, c
 
 // Prune removes unused images from local storage.  The optional filters can be used to further
 // define which images should be pruned.
-func Prune(ctx context.Context, filters map[string][]string) ([]string, error) {
+func Prune(ctx context.Context, all *bool, filters map[string][]string) ([]string, error) {
 	var (
 		deleted []string
 	)
@@ -163,6 +163,9 @@ func Prune(ctx context.Context, filters map[string][]string) ([]string, error) {
 		return nil, err
 	}
 	params := url.Values{}
+	if all != nil {
+		params.Set("all", strconv.FormatBool(*all))
+	}
 	if filters != nil {
 		stringFilter, err := bindings.FiltersToString(filters)
 		if err != nil {
@@ -174,7 +177,7 @@ func Prune(ctx context.Context, filters map[string][]string) ([]string, error) {
 	if err != nil {
 		return deleted, err
 	}
-	return deleted, response.Process(nil)
+	return deleted, response.Process(&deleted)
 }
 
 // Tag adds an additional name to locally-stored image. Both the tag and repo parameters are required.

pkg/bindings/test/images_test.go

@@ -16,22 +16,22 @@ import (
 
 var _ = Describe("Podman images", func() {
 	var (
-		//tempdir    string
-		//err        error
-		//podmanTest *PodmanTestIntegration
+		// tempdir    string
+		// err        error
+		// podmanTest *PodmanTestIntegration
 		bt  *bindingTest
 		s   *gexec.Session
 		err error
 	)
 
 	BeforeEach(func() {
-		//tempdir, err = CreateTempDirInTempDir()
-		//if err != nil {
+		// tempdir, err = CreateTempDirInTempDir()
+		// if err != nil {
 		//	os.Exit(1)
-		//}
-		//podmanTest = PodmanTestCreate(tempdir)
-		//podmanTest.Setup()
-		//podmanTest.SeedImages()
+		// }
+		// podmanTest = PodmanTestCreate(tempdir)
+		// podmanTest.Setup()
+		// podmanTest.SeedImages()
 		bt = newBindingTest()
 		bt.RestoreImagesFromCache()
 		s = bt.startAPIService()
@@ -41,12 +41,13 @@ var _ = Describe("Podman images", func() {
 	})
 
 	AfterEach(func() {
-		//podmanTest.Cleanup()
-		//f := CurrentGinkgoTestDescription()
-		//processTestResult(f)
+		// podmanTest.Cleanup()
+		// f := CurrentGinkgoTestDescription()
+		// processTestResult(f)
 		s.Kill()
 		bt.cleanup()
 	})
+
 	It("inspect image", func() {
 		// Inspect invalid image be 404
 		_, err = images.GetImage(bt.conn, "foobar5000", nil)
@@ -71,7 +72,7 @@ var _ = Describe("Podman images", func() {
 		Expect(err).To(BeNil())
 		// TODO it looks like the images API alwaays returns size regardless
 		// of bool or not. What should we do ?
-		//Expect(data.Size).To(BeZero())
+		// Expect(data.Size).To(BeZero())
 
 		// Enabling the size parameter should result in size being populated
 		data, err = images.GetImage(bt.conn, alpine.name, &bindings.PTrue)
@@ -142,7 +143,7 @@ var _ = Describe("Podman images", func() {
 		err = images.Tag(bt.conn, alpine.shortName, "demo", alpine.shortName)
 		Expect(err).To(BeNil())
 
-		//Validates if name updates when the image is retagged.
+		// Validates if name updates when the image is retagged.
 		_, err := images.GetImage(bt.conn, "alpine:demo", nil)
 		Expect(err).To(BeNil())
 
@@ -165,7 +166,7 @@ var _ = Describe("Podman images", func() {
 		Expect(err).To(BeNil())
 		Expect(len(imageSummary)).To(Equal(3))
 
-		//Validate the image names.
+		// Validate the image names.
 		var names []string
 		for _, i := range imageSummary {
 			names = append(names, i.RepoTags...)
@@ -289,6 +290,7 @@ var _ = Describe("Podman images", func() {
 		Expect(data.Comment).To(Equal(testMessage))
 
 	})
+
 	It("History Image", func() {
 		// a bogus name should return a 404
 		_, err := images.History(bt.conn, "foobar")
@@ -343,4 +345,12 @@ var _ = Describe("Podman images", func() {
 		Expect(len(imgs)).To(BeNumerically(">=", 1))
 	})
 
+	It("Prune images", func() {
+		trueBoxed := true
+		results, err := images.Prune(bt.conn, &trueBoxed, nil)
+		Expect(err).NotTo(HaveOccurred())
+		Expect(len(results)).To(BeNumerically(">", 0))
+		Expect(results).To(ContainElement("docker.io/library/alpine:latest"))
+	})
+
 })

pkg/domain/entities/images.go

@@ -119,7 +119,7 @@ type ImageInspectOptions struct {
 
 type ImageListOptions struct {
 	All     bool       `json:"all" schema:"all"`
-	Filter  []string   `json:",omitempty"`
+	Filter  []string   `json:"Filter,omitempty"`
 	Filters url.Values `json:"filters" schema:"filters"`
 }
 
@@ -128,8 +128,9 @@ type ImageListOptions struct {
 // }
 
 type ImagePruneOptions struct {
-	All    bool
-	Filter ImageFilter
+	All     bool       `json:"all" schema:"all"`
+	Filter  []string   `json:"filter" schema:"filter"`
+	Filters url.Values `json:"filters" schema:"filters"`
 }
 
 type ImagePruneReport struct {

pkg/domain/infra/abi/images.go

@@ -88,13 +88,18 @@ func (ir *ImageEngine) deleteImage(ctx context.Context, img *libpodImage.Image,
 }
 
 func (ir *ImageEngine) Prune(ctx context.Context, opts entities.ImagePruneOptions) (*entities.ImagePruneReport, error) {
-	results, err := ir.Libpod.ImageRuntime().PruneImages(ctx, opts.All, []string{})
+	results, err := ir.Libpod.ImageRuntime().PruneImages(ctx, opts.All, opts.Filter)
 	if err != nil {
 		return nil, err
 	}
 
-	report := entities.ImagePruneReport{}
-	copy(report.Report.Id, results)
+	report := entities.ImagePruneReport{
+		Report: entities.Report{
+			Id:  results,
+			Err: nil,
+		},
+		Size: 0,
+	}
 	return &report, nil
 }
 

pkg/domain/infra/tunnel/images.go

@@ -2,7 +2,6 @@ package tunnel
 
 import (
 	"context"
-	"net/url"
 
 	images "github.com/containers/libpod/pkg/bindings/images"
 	"github.com/containers/libpod/pkg/domain/entities"
@@ -72,12 +71,17 @@ func (ir *ImageEngine) History(ctx context.Context, nameOrId string, opts entiti
 }
 
 func (ir *ImageEngine) Prune(ctx context.Context, opts entities.ImagePruneOptions) (*entities.ImagePruneReport, error) {
-	results, err := images.Prune(ir.ClientCxt, url.Values{})
+	results, err := images.Prune(ir.ClientCxt, &opts.All, opts.Filters)
 	if err != nil {
 		return nil, err
 	}
 
-	report := entities.ImagePruneReport{}
-	copy(report.Report.Id, results)
+	report := entities.ImagePruneReport{
+		Report: entities.Report{
+			Id:  results,
+			Err: nil,
+		},
+		Size: 0,
+	}
 	return &report, nil
 }