manifest, push: use source as destination if not specified

`manifest push <source>` must work as-is if `source` is actually a valid
path and no destination is provided, `podman` must internally choose
`source` as its `destination` just like `podman push`

See: https://github.com/containers/podman/blob/main/cmd/podman/images/push.go#L161
Closes: #18360

Signed-off-by: Aditya R <arajan@redhat.com>

cmd/podman/manifest/push.go

@@ -36,7 +36,7 @@ var (
 		Long:              "Pushes manifest lists and image indexes to registries.",
 		RunE:              push,
 		Example:           `podman manifest push mylist:v1.11 docker://quay.io/myuser/image:v1.11`,
-		Args:              cobra.ExactArgs(2),
+		Args:              cobra.RangeArgs(1, 2),
 		ValidArgsFunction: common.AutocompleteImages,
 	}
 )
@@ -114,7 +114,7 @@ func push(cmd *cobra.Command, args []string) error {
 		return err
 	}
 	listImageSpec := args[0]
-	destSpec := args[1]
+	destSpec := args[len(args)-1]
 	if listImageSpec == "" {
 		return fmt.Errorf(`invalid image name "%s"`, listImageSpec)
 	}
@@ -155,7 +155,7 @@ func push(cmd *cobra.Command, args []string) error {
 		}
 		manifestPushOpts.SkipTLSVerify = types.NewOptionalBool(manifestPushOpts.Insecure)
 	}
-	digest, err := registry.ImageEngine().ManifestPush(registry.Context(), args[0], args[1], manifestPushOpts.ImagePushOptions)
+	digest, err := registry.ImageEngine().ManifestPush(registry.Context(), listImageSpec, destSpec, manifestPushOpts.ImagePushOptions)
 	if err != nil {
 		return err
 	}

test/e2e/manifest_test.go

@@ -46,7 +46,7 @@ var _ = Describe("Podman manifest", func() {
 		f := CurrentGinkgoTestDescription()
 		processTestResult(f)
 	})
-	It("create w/o image", func() {
+	It("create w/o image and attempt push w/o dest", func() {
 		for _, amend := range []string{"--amend", "-a"} {
 			session := podmanTest.Podman([]string{"manifest", "create", "foo"})
 			session.WaitWithDefaultTimeout()
@@ -56,6 +56,13 @@ var _ = Describe("Podman manifest", func() {
 			session.WaitWithDefaultTimeout()
 			Expect(session).To(ExitWithError())
 
+			session = podmanTest.Podman([]string{"manifest", "push", "--all", "foo"})
+			session.WaitWithDefaultTimeout()
+			Expect(session).To(ExitWithError())
+			// Push should actually fail since its not valid registry
+			Expect(session.ErrorToString()).To(ContainSubstring("requested access to the resource is denied"))
+			Expect(session.OutputToString()).To(Not(ContainSubstring("accepts 2 arg(s), received 1")))
+
 			session = podmanTest.Podman([]string{"manifest", "create", amend, "foo"})
 			session.WaitWithDefaultTimeout()
 			Expect(session).Should(Exit(0))

test/e2e/push_test.go

@@ -313,6 +313,16 @@ var _ = Describe("Podman push", func() {
 		push.WaitWithDefaultTimeout()
 		Expect(push).Should(Exit(0))
 		Expect(push.ErrorToString()).To(ContainSubstring("Writing manifest to image destination"))
+
+		// create and push manifest
+		session = podmanTest.Podman([]string{"manifest", "create", "localhost:5000/manifesttest"})
+		session.WaitWithDefaultTimeout()
+		Expect(session).Should(Exit(0))
+
+		session = podmanTest.Podman([]string{"manifest", "push", "--creds=podmantest:test", "--tls-verify=false", "--all", "localhost:5000/manifesttest"})
+		session.WaitWithDefaultTimeout()
+		Expect(session).Should(Exit(0))
+		Expect(session.ErrorToString()).To(ContainSubstring("Writing manifest list to image destination"))
 	})
 
 	It("podman push and encrypt to oci", func() {