Fixes podman pod create --pod-id-file #6292

Prints pod id to file and adds relevant test case

Signed-off-by: Sujil02 <sushah@redhat.com>

cmd/podman/pods/create.go

@@ -3,6 +3,7 @@ package pods
 import (
 	"context"
 	"fmt"
+	"io/ioutil"
 	"os"
 	"strings"
 
@@ -147,6 +148,11 @@ func create(cmd *cobra.Command, args []string) error {
 	if err != nil {
 		return err
 	}
+	if len(podIDFile) > 0 {
+		if err = ioutil.WriteFile(podIDFile, []byte(response.Id), 0644); err != nil {
+			return errors.Wrapf(err, "failed to write pod ID to file %q", podIDFile)
+		}
+	}
 	fmt.Println(response.Id)
 	return nil
 }

test/e2e/pod_create_test.go

@@ -2,7 +2,9 @@ package integration
 
 import (
 	"fmt"
+	"io/ioutil"
 	"os"
+	"path/filepath"
 	"strings"
 
 	. "github.com/containers/libpod/test/utils"
@@ -284,4 +286,26 @@ var _ = Describe("Podman pod create", func() {
 		podCreate.WaitWithDefaultTimeout()
 		Expect(podCreate.ExitCode()).To(Equal(125))
 	})
+
+	It("podman create pod and print id to external file", func() {
+		// Switch to temp dir and restore it afterwards
+		cwd, err := os.Getwd()
+		Expect(err).To(BeNil())
+		Expect(os.Chdir(os.TempDir())).To(BeNil())
+		targetPath := filepath.Join(os.TempDir(), "dir")
+		Expect(os.MkdirAll(targetPath, 0755)).To(BeNil())
+		targetFile := filepath.Join(targetPath, "idFile")
+		defer Expect(os.RemoveAll(targetFile)).To(BeNil())
+		defer Expect(os.Chdir(cwd)).To(BeNil())
+
+		session := podmanTest.Podman([]string{"pod", "create", "--name=abc", "--pod-id-file", targetFile})
+		session.WaitWithDefaultTimeout()
+		Expect(session.ExitCode()).To(Equal(0))
+
+		id, _ := ioutil.ReadFile(targetFile)
+		check := podmanTest.Podman([]string{"pod", "inspect", "abc"})
+		check.WaitWithDefaultTimeout()
+		data := check.InspectPodToJSON()
+		Expect(data.ID).To(Equal(string(id)))
+	})
 })