fix(generate): fix up podman generate kube missing env field bug

the logic is: if the process env vars key exists in podman default or in image defined, and the value is equal, skip the env var key.
the typo make it compare to itself -_-
so, here comes the simple fixup.

Signed-off-by: 荒野無燈 <ttys3.rust@gmail.com>

libpod/kube.go

@@ -747,7 +747,7 @@ func libpodEnvVarsToKubeEnvVars(envs []string, imageEnvs []string) ([]v1.EnvVar,
 	defaultEnv := env.DefaultEnvVariables()
 	envVars := make([]v1.EnvVar, 0, len(envs))
 	imageMap := make(map[string]string, len(imageEnvs))
-	for _, ie := range envs {
+	for _, ie := range imageEnvs {
 		split := strings.SplitN(ie, "=", 2)
 		imageMap[split[0]] = split[1]
 	}

test/e2e/generate_kube_test.go

@@ -1100,4 +1100,28 @@ USER test1`
 			Expect(pod.GetAnnotations()).To(HaveKeyWithValue("io.containers.autoupdate.authfile/"+ctr, "/some/authfile.json"))
 		}
 	})
+
+	It("podman generate kube can export env variables correctly", func() {
+		// Fixes https://github.com/containers/podman/issues/12647
+		// PR https://github.com/containers/podman/pull/12648
+
+		ctrName := "gen-kube-env-ctr"
+		podName := "gen-kube-env"
+		session1 := podmanTest.Podman([]string{"run", "-d", "--pod", "new:" + podName, "--name", ctrName,
+			"-e", "FOO=bar",
+			"-e", "HELLO=WORLD",
+			"alpine", "top"})
+		session1.WaitWithDefaultTimeout()
+		Expect(session1).Should(Exit(0))
+
+		kube := podmanTest.Podman([]string{"generate", "kube", podName})
+		kube.WaitWithDefaultTimeout()
+		Expect(kube).Should(Exit(0))
+
+		pod := new(v1.Pod)
+		err := yaml.Unmarshal(kube.Out.Contents(), pod)
+		Expect(err).To(BeNil())
+
+		Expect(pod.Spec.Containers[0].Env).To(HaveLen(2))
+	})
 })