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, 24 insertions, 2 deletions

diff --git a/cmd/podman/images/trust_set.go b/cmd/podman/images/trust_set.go
index 6333512d9..c192669a9 100644
--- a/cmd/podman/images/trust_set.go
+++ b/cmd/podman/images/trust_set.go
@@ -1,10 +1,12 @@
 package images
 
 import (
+	"net/url"
+	"regexp"
+
 	"github.com/containers/common/pkg/completion"
 	"github.com/containers/podman/v3/cmd/podman/common"
 	"github.com/containers/podman/v3/cmd/podman/registry"
-	"github.com/containers/podman/v3/libpod/image"
 	"github.com/containers/podman/v3/pkg/domain/entities"
 	"github.com/containers/podman/v3/pkg/util"
 	"github.com/pkg/errors"
@@ -53,7 +55,7 @@ File(s) must exist before using this command`)
 func setTrust(cmd *cobra.Command, args []string) error {
 	validTrustTypes := []string{"accept", "insecureAcceptAnything", "reject", "signedBy"}
 
-	valid, err := image.IsValidImageURI(args[0])
+	valid, err := isValidImageURI(args[0])
 	if err != nil || !valid {
 		return err
 	}
@@ -63,3 +65,23 @@ func setTrust(cmd *cobra.Command, args []string) error {
 	}
 	return registry.ImageEngine().SetTrust(registry.Context(), args, setOptions)
 }
+
+// isValidImageURI checks if image name has valid format
+func isValidImageURI(imguri string) (bool, error) {
+	uri := "http://" + imguri
+	u, err := url.Parse(uri)
+	if err != nil {
+		return false, errors.Wrapf(err, "invalid image uri: %s", imguri)
+	}
+	reg := regexp.MustCompile(`^[a-zA-Z0-9-_\.]+\/?:?[0-9]*[a-z0-9-\/:]*$`)
+	ret := reg.FindAllString(u.Host, -1)
+	if len(ret) == 0 {
+		return false, errors.Wrapf(err, "invalid image uri: %s", imguri)
+	}
+	reg = regexp.MustCompile(`^[a-z0-9-:\./]*$`)
+	ret = reg.FindAllString(u.Fragment, -1)
+	if len(ret) == 0 {
+		return false, errors.Wrapf(err, "invalid image uri: %s", imguri)
+	}
+	return true, nil
+}