feature: add volume ls quiet flag support

cli/volume.go

@@ -284,6 +284,7 @@ type VolumeListCommand struct {
 
 	size       bool
 	mountPoint bool
+	quiet      bool
 }
 
 // Init initializes VolumeListCommand command.
@@ -308,6 +309,7 @@ func (v *VolumeListCommand) addFlags() {
 	flagSet := v.cmd.Flags()
 	flagSet.BoolVar(&v.size, "size", false, "Display volume size")
 	flagSet.BoolVar(&v.mountPoint, "mountpoint", false, "Display volume mountpoint")
+	flagSet.BoolVarP(&v.quiet, "quiet", "q", false, "Only display volume names")
 }
 
 // runVolumeList is the entry of VolumeListCommand command.
@@ -322,27 +324,39 @@ func (v *VolumeListCommand) runVolumeList(args []string) error {
 		return err
 	}
 
-	display := v.cli.NewTableDisplay()
-	displayHead := []string{"DRIVER", "VOLUME NAME"}
-	if v.size {
-		displayHead = append(displayHead, "SIZE")
+	if (v.size || v.mountPoint) && v.quiet {
+		return fmt.Errorf("Conflicting options: --size (or --mountpoint) and -q")
 	}
-	if v.mountPoint {
-		displayHead = append(displayHead, "MOUNT POINT")
+
+	display := v.cli.NewTableDisplay()
+	displayHead := []string{"VOLUME NAME"}
+
+	if !v.quiet {
+		displayHead = append([]string{"DRIVER"}, displayHead...)
+		if v.size {
+			displayHead = append(displayHead, "SIZE")
+		}
+		if v.mountPoint {
+			displayHead = append(displayHead, "MOUNT POINT")
+		}
 	}
+
 	display.AddRow(displayHead)
 
 	for _, volume := range volumeList.Volumes {
-		displayLine := []string{volume.Driver, volume.Name}
-		if v.size {
-			if s, ok := volume.Status["size"]; ok {
-				displayLine = append(displayLine, s.(string))
-			} else {
-				displayLine = append(displayLine, "ulimit")
+		displayLine := []string{volume.Name}
+		if !v.quiet {
+			displayLine = append([]string{volume.Driver}, displayLine...)
+			if v.size {
+				if s, ok := volume.Status["size"]; ok {
+					displayLine = append(displayLine, s.(string))
+				} else {
+					displayLine = append(displayLine, "ulimit")
+				}
+			}
+			if v.mountPoint {
+				displayLine = append(displayLine, volume.Mountpoint)
 			}
-		}
-		if v.mountPoint {
-			displayLine = append(displayLine, volume.Mountpoint)
 		}
 		display.AddRow(displayLine)
 	}
@@ -358,5 +372,10 @@ func volumeListExample() string {
 DRIVER   VOLUME NAME
 local    pouch-volume-1
 local    pouch-volume-2
-local    pouch-volume-3`
+local    pouch-volume-3
+$ pouch volume list --quiet
+VOLUME NAME
+pouch-volume-1
+pouch-volume-2
+pouch-volume-3`
 }

test/cli_volume_test.go

@@ -26,6 +26,8 @@ func init() {
 func (suite *PouchVolumeSuite) SetUpSuite(c *check.C) {
 	SkipIfFalse(c, environment.IsLinux)
 
+	environment.PruneAllVolumes(apiClient)
+	environment.PruneAllContainers(apiClient)
 	PullImage(c, busyboxImage)
 }
 
@@ -293,7 +295,7 @@ func (suite *PouchVolumeSuite) TestVolumeList(c *check.C) {
 	}
 }
 
-// TestVolumeListOptions tests the volume list with options: size and mountpoint.
+// TestVolumeListOptions tests the volume list with options: size, mountpoint, quiet.
 func (suite *PouchVolumeSuite) TestVolumeListOptions(c *check.C) {
 	pc, _, _, _ := runtime.Caller(0)
 	tmpname := strings.Split(runtime.FuncForPC(pc).Name(), ".")
@@ -315,6 +317,7 @@ func (suite *PouchVolumeSuite) TestVolumeListOptions(c *check.C) {
 	command.PouchRun("volume", "create", "--name", volumeName3, "-o", "opt.size=3g").Assert(c, icmd.Success)
 	defer command.PouchRun("volume", "rm", volumeName3)
 
+	// test --size and --mountpoint options
 	ret := command.PouchRun("volume", "list", "--size", "--mountpoint")
 	ret.Assert(c, icmd.Success)
 
@@ -327,4 +330,24 @@ func (suite *PouchVolumeSuite) TestVolumeListOptions(c *check.C) {
 			}
 		}
 	}
+
+	// test --quiet options
+	ret = command.PouchRun("volume", "list", "--quiet")
+	ret.Assert(c, icmd.Success)
+
+	lines := strings.Split(ret.Stdout(), "\n")
+	fields := strings.Split(lines[1], " ")
+	c.Assert(len(fields), check.Equals, 1)
+
+	for _, line := range lines {
+		if !strings.Contains(line, volumeName) {
+			continue
+		}
+		if !strings.EqualFold(line, volumeName1) &&
+			!strings.EqualFold(line, volumeName2) &&
+			!strings.EqualFold(line, volumeName3) {
+			c.Errorf("list volume doesn't match any existing volume name, line: %s", line)
+			break
+		}
+	}
 }

test/environment/cleanup.go

@@ -44,3 +44,19 @@ func PruneAllContainers(apiClient client.ContainerAPIClient) error {
 	}
 	return nil
 }
+
+// PruneAllVolumes deletes all volumes from pouchd
+func PruneAllVolumes(apiClient client.VolumeAPIClient) error {
+	ctx := context.Background()
+	volumes, err := apiClient.VolumeList(ctx)
+	if err != nil {
+		return errors.Wrap(err, "fail to list volumes")
+	}
+
+	for _, volume := range volumes.Volumes {
+		if err := apiClient.VolumeRemove(ctx, volume.Name); err != nil {
+			return errors.Wrap(err, fmt.Sprintf("fail to remove volume (%s)", volume.Name))
+		}
+	}
+	return nil
+}