podman rmi shouldn't delete named referenced images

If an image is created from another and it is deleted,
only delete the actual image and not the parent images
if the parent images have names/references.

Signed-off-by: umohnani8 <umohnani@redhat.com>

Closes: #1174
Approved by: mheon

libpod/image/image.go

@@ -363,7 +363,7 @@ func (i *Image) Remove(force bool) error {
 		}
 		// Do not remove if image is a base image and is not untagged, or if
 		// the image has more children.
-		if (nextParent == nil && len(parent.Names()) > 0) || len(children) > 0 {
+		if len(children) > 0 || len(parent.Names()) > 0 {
 			return nil
 		}
 		id := parent.ID()

test/e2e/rmi_test.go

@@ -141,6 +141,41 @@ var _ = Describe("Podman rmi", func() {
 		Expect(session.ExitCode()).To(Not(Equal(0)))
 	})
 
+	It("podman rmi image that is created from another named imaged", func() {
+		session := podmanTest.Podman([]string{"rmi", "-fa"})
+		session.WaitWithDefaultTimeout()
+		Expect(session.ExitCode()).To(Equal(0))
+
+		session = podmanTest.Podman([]string{"run", "--name", "c_test1", ALPINE, "true"})
+		session.WaitWithDefaultTimeout()
+		Expect(session.ExitCode()).To(Equal(0))
+
+		session = podmanTest.Podman([]string{"commit", "-q", "c_test1", "test1"})
+		session.WaitWithDefaultTimeout()
+		Expect(session.ExitCode()).To(Equal(0))
+
+		session = podmanTest.Podman([]string{"run", "--name", "c_test2", "test1", "true"})
+		session.WaitWithDefaultTimeout()
+		Expect(session.ExitCode()).To(Equal(0))
+
+		session = podmanTest.Podman([]string{"commit", "-q", "c_test2", "test2"})
+		session.WaitWithDefaultTimeout()
+		Expect(session.ExitCode()).To(Equal(0))
+
+		session = podmanTest.Podman([]string{"rm", "-a"})
+		session.WaitWithDefaultTimeout()
+		Expect(session.ExitCode()).To(Equal(0))
+
+		session = podmanTest.Podman([]string{"rmi", "test2"})
+		session.WaitWithDefaultTimeout()
+		Expect(session.ExitCode()).To(Equal(0))
+
+		session = podmanTest.Podman([]string{"images", "-q"})
+		session.WaitWithDefaultTimeout()
+		Expect(session.ExitCode()).To(Equal(0))
+		Expect(len(session.OutputToStringArray())).To(Equal(2))
+	})
+
 	It("podman rmi with cached images", func() {
 		session := podmanTest.Podman([]string{"rmi", "-fa"})
 		session.WaitWithDefaultTimeout()