Add quiet/q flag to podman secret ls

Add quiet/q flag to podman secret ls, which will print only the secret
ID.

Signed-off-by: Ashley Cui <acui@redhat.com>

cmd/podman/secrets/list.go

@@ -34,6 +34,7 @@ type listFlagType struct {
 	format    string
 	noHeading bool
 	filter    []string
+	quiet     bool
 }
 
 func init() {
@@ -43,13 +44,20 @@ func init() {
 	})
 
 	flags := lsCmd.Flags()
+
 	formatFlagName := "format"
 	flags.StringVar(&listFlag.format, formatFlagName, "{{.ID}}\t{{.Name}}\t{{.Driver}}\t{{.CreatedAt}}\t{{.UpdatedAt}}\t\n", "Format volume output using Go template")
 	_ = lsCmd.RegisterFlagCompletionFunc(formatFlagName, common.AutocompleteFormat(&entities.SecretInfoReport{}))
+
 	filterFlagName := "filter"
 	flags.StringSliceVarP(&listFlag.filter, filterFlagName, "f", []string{}, "Filter secret output")
 	_ = lsCmd.RegisterFlagCompletionFunc(filterFlagName, common.AutocompleteSecretFilters)
-	flags.BoolVar(&listFlag.noHeading, "noheading", false, "Do not print headers")
+
+	noHeadingFlagName := "noheading"
+	flags.BoolVar(&listFlag.noHeading, noHeadingFlagName, false, "Do not print headers")
+
+	quietFlagName := "quiet"
+	flags.BoolVarP(&listFlag.quiet, quietFlagName, "q", false, "Print secret IDs only")
 }
 
 func ls(cmd *cobra.Command, args []string) error {
@@ -76,9 +84,21 @@ func ls(cmd *cobra.Command, args []string) error {
 			Driver:    response.Spec.Driver.Name,
 		})
 	}
+
+	if listFlag.quiet && !cmd.Flags().Changed("format") {
+		return quietOut(listed)
+	}
+
 	return outputTemplate(cmd, listed)
 }
 
+func quietOut(responses []*entities.SecretListReport) error {
+	for _, response := range responses {
+		fmt.Println(response.ID)
+	}
+	return nil
+}
+
 func outputTemplate(cmd *cobra.Command, responses []*entities.SecretListReport) error {
 	headers := report.Headers(entities.SecretListReport{}, map[string]string{
 		"CreatedAt": "CREATED",

docs/source/markdown/podman-secret-ls.1.md

@@ -30,7 +30,11 @@ Format secret output using Go template.
 
 #### **--noheading**
 
-Omit the table headings from the listing of secrets.	.
+Omit the table headings from the listing of secrets.
+
+#### **--quiet**, **-q**
+
+Print secret IDs only.
 
 ## EXAMPLES
 

test/e2e/secret_test.go

@@ -145,6 +145,36 @@ var _ = Describe("Podman secret", func() {
 
 	})
 
+	It("podman secret ls --quiet", func() {
+		secretFilePath := filepath.Join(podmanTest.TempDir, "secret")
+		err := ioutil.WriteFile(secretFilePath, []byte("mysecret"), 0755)
+		Expect(err).To(BeNil())
+
+		secretName := "a"
+
+		session := podmanTest.Podman([]string{"secret", "create", secretName, secretFilePath})
+		session.WaitWithDefaultTimeout()
+		Expect(session).Should(Exit(0))
+		secretID := session.OutputToString()
+
+		list := podmanTest.Podman([]string{"secret", "ls", "-q"})
+		list.WaitWithDefaultTimeout()
+		Expect(list).Should(Exit(0))
+		Expect(list.OutputToString()).To(Equal(secretID))
+
+		list = podmanTest.Podman([]string{"secret", "ls", "--quiet"})
+		list.WaitWithDefaultTimeout()
+		Expect(list).Should(Exit(0))
+		Expect(list.OutputToString()).To(Equal(secretID))
+
+		// Prefer format over quiet
+		list = podmanTest.Podman([]string{"secret", "ls", "-q", "--format", "{{.Name}}"})
+		list.WaitWithDefaultTimeout()
+		Expect(list).Should(Exit(0))
+		Expect(list.OutputToString()).To(Equal(secretName))
+
+	})
+
 	It("podman secret ls with filters", func() {
 		secretFilePath := filepath.Join(podmanTest.TempDir, "secret")
 		err := ioutil.WriteFile(secretFilePath, []byte("mysecret"), 0755)