[NO NEW TESTS NEEDED] Refactor podman container command output

cmd/podman/containers/mount.go

@@ -81,7 +81,7 @@ func init() {
 	validate.AddLatestFlag(containerMountCommand, &mountOpts.Latest)
 }
 
-func mount(_ *cobra.Command, args []string) error {
+func mount(cmd *cobra.Command, args []string) error {
 	if len(args) > 0 && mountOpts.Latest {
 		return errors.Errorf("--latest and containers cannot be used together")
 	}
@@ -116,18 +116,14 @@ func mount(_ *cobra.Command, args []string) error {
 		mrs = append(mrs, mountReporter{r})
 	}
 
-	format := "{{range . }}{{.ID}}\t{{.Path}}\n{{end -}}"
-	tmpl, err := report.NewTemplate("mounts").Parse(format)
-	if err != nil {
-		return err
-	}
+	rpt := report.New(os.Stdout, cmd.Name())
+	defer rpt.Flush()
 
-	w, err := report.NewWriterDefault(os.Stdout)
+	rpt, err = rpt.Parse(report.OriginPodman, "{{range . }}{{.ID}}\t{{.Path}}\n{{end -}}")
 	if err != nil {
 		return err
 	}
-	defer w.Flush()
-	return tmpl.Execute(w, mrs)
+	return rpt.Execute(mrs)
 }
 
 func printJSON(reports []*entities.ContainerMountReport) error {

cmd/podman/containers/ps.go

@@ -220,30 +220,28 @@ func ps(cmd *cobra.Command, _ []string) error {
 
 	hdrs, format := createPsOut()
 
+	var origin report.Origin
 	noHeading, _ := cmd.Flags().GetBool("noheading")
 	if cmd.Flags().Changed("format") {
 		noHeading = noHeading || !report.HasTable(listOpts.Format)
-		format = report.NormalizeFormat(listOpts.Format)
-		format = report.EnforceRange(format)
+		format = listOpts.Format
+		origin = report.OriginUser
+	} else {
+		origin = report.OriginPodman
 	}
 	ns := strings.NewReplacer(".Namespaces.", ".")
 	format = ns.Replace(format)
 
-	tmpl, err := report.NewTemplate("list").Parse(format)
-	if err != nil {
-		return err
-	}
-
-	w, err := report.NewWriterDefault(os.Stdout)
+	rpt, err := report.New(os.Stdout, cmd.Name()).Parse(origin, format)
 	if err != nil {
 		return err
 	}
-	defer w.Flush()
+	defer rpt.Flush()
 
 	headers := func() error { return nil }
 	if !noHeading {
 		headers = func() error {
-			return tmpl.Execute(w, hdrs)
+			return rpt.Execute(hdrs)
 		}
 	}
 
@@ -268,10 +266,10 @@ func ps(cmd *cobra.Command, _ []string) error {
 			if err := headers(); err != nil {
 				return err
 			}
-			if err := tmpl.Execute(w, responses); err != nil {
+			if err := rpt.Execute(responses); err != nil {
 				return err
 			}
-			if err := w.Flush(); err != nil {
+			if err := rpt.Flush(); err != nil {
 				// we usually do not care about Flush() failures but here do not loop if Flush() has failed
 				return err
 			}
@@ -282,7 +280,7 @@ func ps(cmd *cobra.Command, _ []string) error {
 		if err := headers(); err != nil {
 			return err
 		}
-		if err := tmpl.Execute(w, responses); err != nil {
+		if err := rpt.Execute(responses); err != nil {
 			return err
 		}
 	}

cmd/podman/containers/stats.go

@@ -126,14 +126,14 @@ func stats(cmd *cobra.Command, args []string) error {
 		if report.Error != nil {
 			return report.Error
 		}
-		if err := outputStats(report.Stats); err != nil {
+		if err := outputStats(cmd, report.Stats); err != nil {
 			return err
 		}
 	}
 	return nil
 }
 
-func outputStats(reports []define.ContainerStats) error {
+func outputStats(cmd *cobra.Command, reports []define.ContainerStats) error {
 	headers := report.Headers(define.ContainerStats{}, map[string]string{
 		"ID":            "ID",
 		"UpTime":        "CPU TIME",
@@ -158,32 +158,27 @@ func outputStats(reports []define.ContainerStats) error {
 	if report.IsJSON(statsOptions.Format) {
 		return outputJSON(stats)
 	}
-	format := "{{.ID}}\t{{.Name}}\t{{.CPUPerc}}\t{{.MemUsage}}\t{{.MemPerc}}\t{{.NetIO}}\t{{.BlockIO}}\t{{.PIDS}}\t{{.UpTime}}\t{{.AVGCPU}}\n"
-	if len(statsOptions.Format) > 0 {
-		format = report.NormalizeFormat(statsOptions.Format)
-	}
-	format = report.EnforceRange(format)
 
-	tmpl, err := report.NewTemplate("stats").Parse(format)
-	if err != nil {
-		return err
-	}
+	rpt := report.New(os.Stdout, cmd.Name())
+	defer rpt.Flush()
 
-	w, err := report.NewWriterDefault(os.Stdout)
+	var err error
+	if cmd.Flags().Changed("format") {
+		rpt, err = rpt.Parse(report.OriginUser, statsOptions.Format)
+	} else {
+		format := "{{range .}}{{.ID}}\t{{.Name}}\t{{.CPUPerc}}\t{{.MemUsage}}\t{{.MemPerc}}\t{{.NetIO}}\t{{.BlockIO}}\t{{.PIDS}}\t{{.UpTime}}\t{{.AVGCPU}}\n{{end -}}"
+		rpt, err = rpt.Parse(report.OriginPodman, format)
+	}
 	if err != nil {
 		return err
 	}
-	defer w.Flush()
 
-	if len(statsOptions.Format) < 1 {
-		if err := tmpl.Execute(w, headers); err != nil {
+	if rpt.RenderHeaders {
+		if err := rpt.Execute(headers); err != nil {
 			return err
 		}
 	}
-	if err := tmpl.Execute(w, stats); err != nil {
-		return err
-	}
-	return nil
+	return rpt.Execute(stats)
 }
 
 type containerStats struct {

cmd/podman/containers/top.go

@@ -77,7 +77,7 @@ func init() {
 	validate.AddLatestFlag(containerTopCommand, &topOptions.Latest)
 }
 
-func top(_ *cobra.Command, args []string) error {
+func top(cmd *cobra.Command, args []string) error {
 	if topOptions.ListDescriptors {
 		descriptors, err := util.GetContainerPidInformationDescriptors()
 		if err != nil {
@@ -103,15 +103,13 @@ func top(_ *cobra.Command, args []string) error {
 		return err
 	}
 
-	w, err := report.NewWriterDefault(os.Stdout)
-	if err != nil {
-		return err
-	}
+	rpt := report.New(os.Stdout, cmd.Name()).Init(os.Stdout, 12, 2, 2, ' ', 0)
+	defer rpt.Flush()
 
 	for _, proc := range topResponse.Value {
-		if _, err := fmt.Fprintln(w, proc); err != nil {
+		if _, err := fmt.Fprintln(rpt.Writer(), proc); err != nil {
 			return err
 		}
 	}
-	return w.Flush()
+	return nil
 }