Restore --format table...

Following commands:
* systemd generate
* networks inspect
* pod stats
  * Fixed test where format was quoted and then quoted again
  * Fixed bug where output never printed '--' on missed reads
* pod ps

Signed-off-by: Jhon Honce <jhonce@redhat.com>

4 files changed, 105 insertions, 142 deletions

diff --git a/cmd/podman/generate/systemd.go b/cmd/podman/generate/systemd.go
index f690836a4..02e826549 100644
--- a/cmd/podman/generate/systemd.go
+++ b/cmd/podman/generate/systemd.go
@@ -6,6 +6,7 @@ import (
 	"os"
 	"path/filepath"
 
+	"github.com/containers/podman/v2/cmd/podman/parse"
 	"github.com/containers/podman/v2/cmd/podman/registry"
 	"github.com/containers/podman/v2/cmd/podman/utils"
 	"github.com/containers/podman/v2/pkg/domain/entities"
@@ -97,10 +98,10 @@ func systemd(cmd *cobra.Command, args []string) error {
 		}
 	}
 
-	switch format {
-	case "json":
+	switch {
+	case parse.MatchesJSONFormat(format):
 		return printJSON(report.Units)
-	case "":
+	case format == "":
 		return printDefault(report.Units)
 	default:
 		return errors.Errorf("unknown --format argument: %s", format)
diff --git a/cmd/podman/networks/inspect.go b/cmd/podman/networks/inspect.go
index c5872def7..c36125948 100644
--- a/cmd/podman/networks/inspect.go
+++ b/cmd/podman/networks/inspect.go
@@ -3,12 +3,13 @@ package network
 import (
 	"encoding/json"
 	"fmt"
-	"io"
 	"os"
-	"strings"
+	"text/tabwriter"
 	"text/template"
 
+	"github.com/containers/podman/v2/cmd/podman/parse"
 	"github.com/containers/podman/v2/cmd/podman/registry"
+	"github.com/containers/podman/v2/cmd/podman/report"
 	"github.com/containers/podman/v2/pkg/domain/entities"
 	"github.com/spf13/cobra"
 )
@@ -39,31 +40,32 @@ func init() {
 	flags.StringVarP(&networkInspectOptions.Format, "format", "f", "", "Pretty-print network to JSON or using a Go template")
 }
 
-func networkInspect(cmd *cobra.Command, args []string) error {
+func networkInspect(_ *cobra.Command, args []string) error {
 	responses, err := registry.ContainerEngine().NetworkInspect(registry.Context(), args, entities.NetworkInspectOptions{})
 	if err != nil {
 		return err
 	}
-	b, err := json.MarshalIndent(responses, "", "  ")
-	if err != nil {
-		return err
-	}
-	if strings.ToLower(networkInspectOptions.Format) == "json" || networkInspectOptions.Format == "" {
-		fmt.Println(string(b))
-	} else {
-		var w io.Writer = os.Stdout
-		//There can be more than 1 in the inspect output.
-		format := "{{range . }}" + networkInspectOptions.Format + "{{end}}"
-		tmpl, err := template.New("inspectNetworks").Parse(format)
+
+	switch {
+	case parse.MatchesJSONFormat(networkInspectOptions.Format) || networkInspectOptions.Format == "":
+		b, err := json.MarshalIndent(responses, "", "  ")
 		if err != nil {
 			return err
 		}
-		if err := tmpl.Execute(w, responses); err != nil {
+		fmt.Println(string(b))
+	default:
+		row := report.NormalizeFormat(networkInspectOptions.Format)
+		// There can be more than 1 in the inspect output.
+		row = "{{range . }}" + row + "{{end}}"
+		tmpl, err := template.New("inspectNetworks").Parse(row)
+		if err != nil {
 			return err
 		}
-		if flusher, ok := w.(interface{ Flush() error }); ok {
-			return flusher.Flush()
-		}
+
+		w := tabwriter.NewWriter(os.Stdout, 8, 2, 0, ' ', 0)
+		defer w.Flush()
+
+		return tmpl.Execute(w, responses)
 	}
 	return nil
 }
diff --git a/cmd/podman/pods/ps.go b/cmd/podman/pods/ps.go
index 7b755cb22..b7952e6e3 100644
--- a/cmd/podman/pods/ps.go
+++ b/cmd/podman/pods/ps.go
@@ -3,7 +3,6 @@ package pods
 import (
 	"context"
 	"fmt"
-	"io"
 	"os"
 	"sort"
 	"strings"
@@ -11,7 +10,9 @@ import (
 	"text/template"
 	"time"
 
+	"github.com/containers/podman/v2/cmd/podman/parse"
 	"github.com/containers/podman/v2/cmd/podman/registry"
+	"github.com/containers/podman/v2/cmd/podman/report"
 	"github.com/containers/podman/v2/cmd/podman/validate"
 	"github.com/containers/podman/v2/pkg/domain/entities"
 	"github.com/docker/go-units"
@@ -34,10 +35,9 @@ var (
 )
 
 var (
-	defaultHeaders = "POD ID\tNAME\tSTATUS\tCREATED"
-	inputFilters   []string
-	noTrunc        bool
-	psInput        entities.PodPSOptions
+	inputFilters []string
+	noTrunc      bool
+	psInput      entities.PodPSOptions
 )
 
 func init() {
@@ -62,11 +62,6 @@ func init() {
 }
 
 func pods(cmd *cobra.Command, _ []string) error {
-	var (
-		w   io.Writer = os.Stdout
-		row string
-	)
-
 	if psInput.Quiet && len(psInput.Format) > 0 {
 		return errors.New("quiet and format cannot be used together")
 	}
@@ -89,80 +84,79 @@ func pods(cmd *cobra.Command, _ []string) error {
 		return err
 	}
 
-	if psInput.Format == "json" {
+	switch {
+	case parse.MatchesJSONFormat(psInput.Format):
 		b, err := json.MarshalIndent(responses, "", "  ")
 		if err != nil {
 			return err
 		}
 		fmt.Println(string(b))
 		return nil
+	case psInput.Quiet:
+		for _, p := range responses {
+			fmt.Println(p.Id)
+		}
+		return nil
 	}
 
+	// Formatted output below
 	lpr := make([]ListPodReporter, 0, len(responses))
 	for _, r := range responses {
 		lpr = append(lpr, ListPodReporter{r})
 	}
-	headers, row := createPodPsOut()
-	if psInput.Quiet {
-		row = "{{.Id}}\n"
-	}
-	if cmd.Flag("format").Changed {
-		row = psInput.Format
-		if !strings.HasPrefix(row, "\n") {
-			row += "\n"
-		}
-	}
-	format := "{{range . }}" + row + "{{end}}"
-	if !psInput.Quiet && !cmd.Flag("format").Changed {
-		format = headers + format
+
+	headers := report.Headers(ListPodReporter{}, map[string]string{
+		"ContainerIds":       "IDS",
+		"ContainerNames":     "NAMES",
+		"ContainerStatuses":  "STATUS",
+		"Namespace":          "NAMESPACES",
+		"NumberOfContainers": "# OF CONTAINERS",
+		"InfraId":            "INFRA ID",
+	})
+	row := podPsFormat()
+	if cmd.Flags().Changed("format") {
+		row = report.NormalizeFormat(psInput.Format)
 	}
-	tmpl, err := template.New("listPods").Parse(format)
+	row = "{{range . }}" + row + "{{end}}"
+
+	tmpl, err := template.New("listPods").Parse(row)
 	if err != nil {
 		return err
 	}
-	if !psInput.Quiet {
-		w = tabwriter.NewWriter(os.Stdout, 8, 2, 2, ' ', 0)
-	}
-	if err := tmpl.Execute(w, lpr); err != nil {
-		return err
-	}
-	if flusher, ok := w.(interface{ Flush() error }); ok {
-		return flusher.Flush()
+	w := tabwriter.NewWriter(os.Stdout, 8, 2, 2, ' ', 0)
+	defer w.Flush()
+
+	if !psInput.Quiet && !cmd.Flag("format").Changed {
+		if err := tmpl.Execute(w, headers); err != nil {
+			return err
+		}
 	}
-	return nil
+	return tmpl.Execute(w, lpr)
 }
 
-func createPodPsOut() (string, string) {
-	var row string
-	headers := defaultHeaders
-	row += "{{.Id}}"
-
-	row += "\t{{.Name}}\t{{.Status}}\t{{.Created}}"
+func podPsFormat() string {
+	row := []string{"{{.Id}}", "{{.Name}}", "{{.Status}}", "{{.Created}}}"}
 
 	if psInput.CtrIds {
-		headers += "\tIDS"
-		row += "\t{{.ContainerIds}}"
+		row = append(row, "{{.ContainerIds}}")
 	}
+
 	if psInput.CtrNames {
-		headers += "\tNAMES"
-		row += "\t{{.ContainerNames}}"
+		row = append(row, "{{.ContainerNames}}")
 	}
+
 	if psInput.CtrStatus {
-		headers += "\tSTATUS"
-		row += "\t{{.ContainerStatuses}}"
+		row = append(row, "{{.ContainerStatuses}}")
 	}
+
 	if psInput.Namespace {
-		headers += "\tCGROUP\tNAMESPACES"
-		row += "\t{{.Cgroup}}\t{{.Namespace}}"
+		row = append(row, "{{.Cgroup}}", "{{.Namespace}}")
 	}
-	if !psInput.CtrStatus && !psInput.CtrNames && !psInput.CtrIds {
-		headers += "\t# OF CONTAINERS"
-		row += "\t{{.NumberOfContainers}}"
 
+	if !psInput.CtrStatus && !psInput.CtrNames && !psInput.CtrIds {
+		row = append(row, "{{.NumberOfContainers}}")
 	}
-	headers += "\tINFRA ID\n"
-	row += "\t{{.InfraId}}\n"
-	return headers, row
+	return strings.Join(row, "\t") + "\n"
 }
 
 // ListPodReporter is a struct for pod ps output
@@ -180,7 +174,7 @@ func (l ListPodReporter) Labels() map[string]string {
 	return l.ListPodsReport.Labels
 }
 
-// NumberofContainers returns an int representation for
+// NumberOfContainers returns an int representation for
 // the number of containers belonging to the pod
 func (l ListPodReporter) NumberOfContainers() int {
 	return len(l.Containers)
@@ -192,7 +186,7 @@ func (l ListPodReporter) ID() string {
 }
 
 // Id returns the Pod id
-func (l ListPodReporter) Id() string { //nolint
+func (l ListPodReporter) Id() string { // nolint
 	if noTrunc {
 		return l.ListPodsReport.Id
 	}
@@ -206,7 +200,7 @@ func (l ListPodReporter) InfraID() string {
 
 // InfraId returns the infra container id for the pod
 // depending on trunc
-func (l ListPodReporter) InfraId() string { //nolint
+func (l ListPodReporter) InfraId() string { // nolint
 	if len(l.ListPodsReport.InfraId) == 0 {
 		return ""
 	}
diff --git a/cmd/podman/pods/stats.go b/cmd/podman/pods/stats.go
index 1d916dbfa..2f59e4e47 100644
--- a/cmd/podman/pods/stats.go
+++ b/cmd/podman/pods/stats.go
@@ -4,18 +4,16 @@ import (
 	"context"
 	"fmt"
 	"os"
-	"reflect"
-	"strings"
 	"text/tabwriter"
 	"text/template"
 	"time"
 
 	"github.com/buger/goterm"
-	"github.com/containers/buildah/pkg/formats"
+	"github.com/containers/podman/v2/cmd/podman/parse"
 	"github.com/containers/podman/v2/cmd/podman/registry"
+	"github.com/containers/podman/v2/cmd/podman/report"
 	"github.com/containers/podman/v2/cmd/podman/validate"
 	"github.com/containers/podman/v2/pkg/domain/entities"
-	"github.com/containers/podman/v2/pkg/util/camelcase"
 	"github.com/spf13/cobra"
 )
 
@@ -67,11 +65,18 @@ func stats(cmd *cobra.Command, args []string) error {
 		return err
 	}
 
-	format := statsOptions.Format
-	doJSON := strings.ToLower(format) == formats.JSONString
-	header := getPodStatsHeader(format)
+	row := report.NormalizeFormat(statsOptions.Format)
+	doJSON := parse.MatchesJSONFormat(row)
 
-	for {
+	headers := report.Headers(entities.PodStatsReport{}, map[string]string{
+		"CPU":      "CPU %",
+		"MemUsage": "MEM USAGE/ LIMIT",
+		"MEM":      "MEM %",
+		"NET IO":   "NET IO",
+		"BlockIO":  "BLOCK IO",
+	})
+
+	for ; ; time.Sleep(time.Second) {
 		reports, err := registry.ContainerEngine().PodStats(context.Background(), args, statsOptions.PodStatsOptions)
 		if err != nil {
 			return err
@@ -87,16 +92,17 @@ func stats(cmd *cobra.Command, args []string) error {
 				goterm.MoveCursor(1, 1)
 				goterm.Flush()
 			}
-			if len(format) == 0 {
+			if cmd.Flags().Changed("format") {
+				if err := printFormattedPodStatsLines(headers, row, reports); err != nil {
+					return err
+				}
+			} else {
 				printPodStatsLines(reports)
-			} else if err := printFormattedPodStatsLines(format, reports, header); err != nil {
-				return err
 			}
 		}
 		if statsOptions.NoStream {
 			break
 		}
-		time.Sleep(time.Second)
 	}
 
 	return nil
@@ -115,72 +121,32 @@ func printPodStatsLines(stats []*entities.PodStatsReport) {
 	w := tabwriter.NewWriter(os.Stdout, 0, 0, 2, ' ', 0)
 	outFormat := "%s\t%s\t%s\t%s\t%s\t%s\t%s\t%s\t%s\n"
 	fmt.Fprintf(w, outFormat, "POD", "CID", "NAME", "CPU %", "MEM USAGE/ LIMIT", "MEM %", "NET IO", "BLOCK IO", "PIDS")
-	for _, i := range stats {
-		if len(stats) == 0 {
-			fmt.Fprintf(w, outFormat, i.Pod, "--", "--", "--", "--", "--", "--", "--", "--")
-		} else {
+	if len(stats) == 0 {
+		fmt.Fprintf(w, outFormat, "--", "--", "--", "--", "--", "--", "--", "--", "--")
+	} else {
+		for _, i := range stats {
 			fmt.Fprintf(w, outFormat, i.Pod, i.CID, i.Name, i.CPU, i.MemUsage, i.Mem, i.NetIO, i.BlockIO, i.PIDS)
 		}
 	}
 	w.Flush()
 }
 
-func printFormattedPodStatsLines(format string, stats []*entities.PodStatsReport, headerNames map[string]string) error {
+func printFormattedPodStatsLines(headerNames []map[string]string, row string, stats []*entities.PodStatsReport) error {
 	if len(stats) == 0 {
 		return nil
 	}
 
-	// Use a tabwriter to align column format
-	w := tabwriter.NewWriter(os.Stdout, 0, 0, 3, ' ', 0)
-	// Spit out the header if "table" is present in the format
-	if strings.HasPrefix(format, "table") {
-		hformat := strings.Replace(strings.TrimSpace(format[5:]), " ", "\t", -1)
-		format = hformat
-		headerTmpl, err := template.New("header").Parse(hformat)
-		if err != nil {
-			return err
-		}
-		if err := headerTmpl.Execute(w, headerNames); err != nil {
-			return err
-		}
-		fmt.Fprintln(w, "")
-	}
+	row = "{{range .}}" + row + "{{end}}"
 
-	// Spit out the data rows now
-	dataTmpl, err := template.New("data").Parse(format)
+	tmpl, err := template.New("pod stats").Parse(row)
 	if err != nil {
 		return err
 	}
-	for _, s := range stats {
-		if err := dataTmpl.Execute(w, s); err != nil {
-			return err
-		}
-		fmt.Fprintln(w, "")
-	}
-	// Flush the writer
-	return w.Flush()
-
-}
+	w := tabwriter.NewWriter(os.Stdout, 0, 0, 3, ' ', 0)
+	defer w.Flush()
 
-// getPodStatsHeader returns the stats header for the specified options.
-func getPodStatsHeader(format string) map[string]string {
-	headerNames := make(map[string]string)
-	if format == "" {
-		return headerNames
-	}
-	// Make a map of the field names for the headers
-	v := reflect.ValueOf(entities.PodStatsReport{})
-	t := v.Type()
-	for i := 0; i < t.NumField(); i++ {
-		split := camelcase.Split(t.Field(i).Name)
-		value := strings.ToUpper(strings.Join(split, " "))
-		switch value {
-		case "CPU", "MEM":
-			value += " %"
-		case "MEM USAGE":
-			value = "MEM USAGE / LIMIT"
-		}
-		headerNames[t.Field(i).Name] = value
+	if err := tmpl.Execute(w, headerNames); err != nil {
+		return err
 	}
-	return headerNames
+	return tmpl.Execute(w, stats)
 }