migrate Podman to containers/common/libimage

Migrate the Podman code base over to `common/libimage` which replaces
`libpod/image` and a lot of glue code entirely.

Note that I tried to leave bread crumbs for changed tests.

Miscellaneous changes:

 * Some errors yield different messages which required to alter some
   tests.

 * I fixed some pre-existing issues in the code.  Others were marked as
   `//TODO`s to prevent the PR from exploding.

 * The `NamesHistory` of an image is returned as is from the storage.
   Previously, we did some filtering which I think is undesirable.
   Instead we should return the data as stored in the storage.

 * Touched handlers use the ABI interfaces where possible.

 * Local image resolution: previously Podman would match "foo" on
   "myfoo".  This behaviour has been changed and Podman will now
   only match on repository boundaries such that "foo" would match
   "my/foo" but not "myfoo".  I consider the old behaviour to be a
   bug, at the very least an exotic corner case.

 * Futhermore, "foo:none" does *not* resolve to a local image "foo"
   without tag anymore.  It's a hill I am (almost) willing to die on.

 * `image prune` prints the IDs of pruned images.  Previously, in some
   cases, the names were printed instead.  The API clearly states ID,
   so we should stick to it.

 * Compat endpoint image removal with _force_ deletes the entire not
   only the specified tag.

Signed-off-by: Valentin Rothberg <rothberg@redhat.com>

1 files changed, 7 insertions, 15 deletions

diff --git a/pkg/specgen/generate/oci.go b/pkg/specgen/generate/oci.go
index 4eae09a5e..bf8d44ed6 100644
--- a/pkg/specgen/generate/oci.go
+++ b/pkg/specgen/generate/oci.go
@@ -5,10 +5,10 @@ import (
 	"path"
 	"strings"
 
+	"github.com/containers/common/libimage"
 	"github.com/containers/common/pkg/config"
 	"github.com/containers/podman/v3/libpod"
 	"github.com/containers/podman/v3/libpod/define"
-	"github.com/containers/podman/v3/libpod/image"
 	"github.com/containers/podman/v3/pkg/cgroups"
 	"github.com/containers/podman/v3/pkg/rootless"
 	"github.com/containers/podman/v3/pkg/specgen"
@@ -95,16 +95,12 @@ func addRlimits(s *specgen.SpecGenerator, g *generate.Generator) error {
 }
 
 // Produce the final command for the container.
-func makeCommand(ctx context.Context, s *specgen.SpecGenerator, img *image.Image, rtc *config.Config) ([]string, error) {
+func makeCommand(ctx context.Context, s *specgen.SpecGenerator, imageData *libimage.ImageData, rtc *config.Config) ([]string, error) {
 	finalCommand := []string{}
 
 	entrypoint := s.Entrypoint
-	if entrypoint == nil && img != nil {
-		newEntry, err := img.Entrypoint(ctx)
-		if err != nil {
-			return nil, err
-		}
-		entrypoint = newEntry
+	if entrypoint == nil && imageData != nil {
+		entrypoint = imageData.Config.Entrypoint
 	}
 
 	// Don't append the entrypoint if it is [""]
@@ -115,12 +111,8 @@ func makeCommand(ctx context.Context, s *specgen.SpecGenerator, img *image.Image
 	// Only use image command if the user did not manually set an
 	// entrypoint.
 	command := s.Command
-	if len(command) == 0 && img != nil && len(s.Entrypoint) == 0 {
-		newCmd, err := img.Cmd(ctx)
-		if err != nil {
-			return nil, err
-		}
-		command = newCmd
+	if len(command) == 0 && imageData != nil && len(s.Entrypoint) == 0 {
+		command = imageData.Config.Cmd
 	}
 
 	finalCommand = append(finalCommand, command...)
@@ -182,7 +174,7 @@ func getCGroupPermissons(unmask []string) string {
 }
 
 // SpecGenToOCI returns the base configuration for the container.
-func SpecGenToOCI(ctx context.Context, s *specgen.SpecGenerator, rt *libpod.Runtime, rtc *config.Config, newImage *image.Image, mounts []spec.Mount, pod *libpod.Pod, finalCmd []string) (*spec.Spec, error) {
+func SpecGenToOCI(ctx context.Context, s *specgen.SpecGenerator, rt *libpod.Runtime, rtc *config.Config, newImage *libimage.Image, mounts []spec.Mount, pod *libpod.Pod, finalCmd []string) (*spec.Spec, error) {
 	cgroupPerm := getCGroupPermissons(s.Unmask)
 
 	g, err := generate.New("linux")