From 7d22cc88ef382033c59d09570d1525189e104eae Mon Sep 17 00:00:00 2001
From: Jhon Honce <jhonce@redhat.com>
Date: Thu, 2 Dec 2021 11:05:03 -0700
Subject: Refactor podman system to report.Formatter [NO NEW TESTS NEEDED]

Support better compatibility output for podman system commands

* Format and content of output from podman version changed to
  be more compatible

See #10974
Depends on containers/common#831

Signed-off-by: Jhon Honce <jhonce@redhat.com>
---
 cmd/podman/system/version.go | 77 +++++++++++++++++++++++---------------------
 1 file changed, 41 insertions(+), 36 deletions(-)

(limited to 'cmd/podman/system/version.go')

diff --git a/cmd/podman/system/version.go b/cmd/podman/system/version.go
index 87b806503..521bb8774 100644
--- a/cmd/podman/system/version.go
+++ b/cmd/podman/system/version.go
@@ -2,16 +2,15 @@ package system
 
 import (
 	"fmt"
-	"io"
 	"os"
 	"strings"
+	"text/template"
 
 	"github.com/containers/common/pkg/completion"
 	"github.com/containers/common/pkg/report"
 	"github.com/containers/podman/v3/cmd/podman/common"
 	"github.com/containers/podman/v3/cmd/podman/registry"
 	"github.com/containers/podman/v3/cmd/podman/validate"
-	"github.com/containers/podman/v3/libpod/define"
 	"github.com/containers/podman/v3/pkg/domain/entities"
 	"github.com/spf13/cobra"
 )
@@ -53,54 +52,60 @@ func version(cmd *cobra.Command, args []string) error {
 		return nil
 	}
 
-	w, err := report.NewWriterDefault(os.Stdout)
-	if err != nil {
-		return err
-	}
-	defer w.Flush()
+	if cmd.Flag("format").Changed {
+		// Cannot use report.New() as it enforces {{range .}} for OriginUser templates
+		tmpl := template.New(cmd.Name()).Funcs(template.FuncMap(report.DefaultFuncs))
 
-	if cmd.Flags().Changed("format") {
-		row := report.NormalizeFormat(versionFormat)
-		tmpl, err := report.NewTemplate("version 2.0.0").Parse(row)
+		versionFormat = report.NormalizeFormat(versionFormat)
+		tmpl, err := tmpl.Parse(versionFormat)
 		if err != nil {
 			return err
 		}
-		if err := tmpl.Execute(w, versions); err != nil {
+		if err := tmpl.Execute(os.Stdout, versions); err != nil {
 			// On Failure, assume user is using older version of podman version --format and check client
-			row = strings.ReplaceAll(row, ".Server.", ".")
-			tmpl, err := report.NewTemplate("version 1.0.0").Parse(row)
+			versionFormat = strings.ReplaceAll(versionFormat, ".Server.", ".")
+			tmpl, err := tmpl.Parse(versionFormat)
 			if err != nil {
 				return err
 			}
-			if err := tmpl.Execute(w, versions.Client); err != nil {
+			if err := tmpl.Execute(os.Stdout, versions.Client); err != nil {
 				return err
 			}
 		}
 		return nil
 	}
 
-	if versions.Server != nil {
-		if _, err := fmt.Fprintf(w, "Client:\n"); err != nil {
-			return err
-		}
-		formatVersion(w, versions.Client)
-		if _, err := fmt.Fprintf(w, "\nServer:\n"); err != nil {
-			return err
-		}
-		formatVersion(w, versions.Server)
-	} else {
-		formatVersion(w, versions.Client)
+	rpt := report.New(os.Stdout, cmd.Name())
+	defer rpt.Flush()
+	rpt, err = rpt.Parse(report.OriginPodman, versionTemplate)
+	if err != nil {
+		return err
 	}
-	return nil
+	return rpt.Execute(versions)
 }
 
-func formatVersion(w io.Writer, version *define.Version) {
-	fmt.Fprintf(w, "Version:\t%s\n", version.Version)
-	fmt.Fprintf(w, "API Version:\t%s\n", version.APIVersion)
-	fmt.Fprintf(w, "Go Version:\t%s\n", version.GoVersion)
-	if version.GitCommit != "" {
-		fmt.Fprintf(w, "Git Commit:\t%s\n", version.GitCommit)
-	}
-	fmt.Fprintf(w, "Built:\t%s\n", version.BuiltTime)
-	fmt.Fprintf(w, "OS/Arch:\t%s\n", version.OsArch)
-}
+const versionTemplate = `{{with .Client -}}
+Client:\tPodman Engine
+Version:\t{{.Version}}
+API Version:\t{{.APIVersion}}
+Go Version:\t{{.GoVersion}}
+{{if .GitCommit -}}
+  Git Commit:\t{{.GitCommit}}
+{{- end}}
+Built:\t{{.BuiltTime}}
+OS/Arch:\t{{.OsArch}}
+{{- end}}
+
+{{- if .Server }}{{with .Server}}
+
+Server:\tPodman Engine
+Version:\t{{.Version}}
+API Version:\t{{.APIVersion}}
+Go Version:\t{{.GoVersion}}
+{{if .GitCommit -}}
+  Git Commit:\t{{.GitCommit}}
+{{- end}}
+Built:\t{{.BuiltTime}}
+OS/Arch:\t{{.OsArch}}
+{{- end}}{{- end}}
+`
-- 
cgit v1.2.3-54-g00ecf