podman version --format ... was not working

This patch fixes the podman --version --format command.

Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

cmd/podman/system/version.go

@@ -7,6 +7,7 @@ import (
 	"strings"
 	"text/tabwriter"
 
+	"github.com/containers/buildah/pkg/formats"
 	"github.com/containers/libpod/cmd/podman/registry"
 	"github.com/containers/libpod/cmd/podman/validate"
 	"github.com/containers/libpod/libpod/define"
@@ -51,6 +52,17 @@ func version(cmd *cobra.Command, args []string) error {
 		if !strings.HasSuffix(versionFormat, "\n") {
 			versionFormat += "\n"
 		}
+		out := formats.StdoutTemplate{Output: versions, Template: versionFormat}
+		err := out.Out()
+		if err != nil {
+			// On Failure, assume user is using older version of podman version --format and check client
+			versionFormat = strings.Replace(versionFormat, ".Server.", ".", 1)
+			out = formats.StdoutTemplate{Output: versions.Client, Template: versionFormat}
+			if err1 := out.Out(); err1 != nil {
+				return err
+			}
+		}
+		return nil
 	}
 
 	w := tabwriter.NewWriter(os.Stdout, 0, 0, 2, ' ', 0)
@@ -73,7 +85,7 @@ func version(cmd *cobra.Command, args []string) error {
 
 func formatVersion(writer io.Writer, version *define.Version) {
 	fmt.Fprintf(writer, "Version:\t%s\n", version.Version)
-	fmt.Fprintf(writer, "RemoteAPI Version:\t%d\n", version.RemoteAPIVersion)
+	fmt.Fprintf(writer, "API Version:\t%d\n", version.APIVersion)
 	fmt.Fprintf(writer, "Go Version:\t%s\n", version.GoVersion)
 	if version.GitCommit != "" {
 		fmt.Fprintf(writer, "Git Commit:\t%s\n", version.GitCommit)

docs/source/markdown/podman-info.1.md

@@ -121,7 +121,7 @@ version:
   GitCommit: c3678ce3289f4195f3f16802411e795c6a587c9f-dirty
   GoVersion: go1.14.2
   OsArch: linux/amd64
-  RemoteAPIVersion: 1
+  APIVersion: 1
   Version: 2.0.0
 ```
 Run podman info with JSON formatted response:
@@ -228,7 +228,7 @@ Run podman info with JSON formatted response:
 ]
   },
   "version": {
-    "RemoteAPIVersion": 1,
+    "APIVersion": 1,
     "Version": "2.0.0",
     "GoVersion": "go1.14.2",
     "GitCommit": "c3678ce3289f4195f3f16802411e795c6a587c9f-dirty",

docs/source/markdown/podman-version.1.md

@@ -25,17 +25,18 @@ Change output format to "json" or a Go template.
 A sample output of the `version` command:
 ```
 $ podman version
-Version:       0.11.1
-Go Version:    go1.11
-Git Commit:    "8967a1d691ed44896b81ad48c863033f23c65eb0-dirty"
-Built:         Thu Nov  8 22:35:40 2018
+Version:      2.0.0
+API Version:  1
+Go Version:   go1.14.2
+Git Commit:   4520664f63c3a7f9a80227715359e20069d95542
+Built:        Tue May 19 10:48:59 2020
 OS/Arch:      linux/amd64
 ```
 
 Filtering out only the version:
 ```
 $ podman version --format '{{.Client.Version}}'
-1.6.3
+2.0.0
 ```
 
 ## SEE ALSO

libpod/define/version.go

@@ -20,7 +20,7 @@ var (
 
 // Version is an output struct for varlink
 type Version struct {
-	RemoteAPIVersion int64
+	APIVersion int64
 	Version    string
 	GoVersion  string
 	GitCommit  string
@@ -42,7 +42,7 @@ func GetVersion() (Version, error) {
 		}
 	}
 	return Version{
-		RemoteAPIVersion: podmanVersion.RemoteAPIVersion,
+		APIVersion: podmanVersion.APIVersion,
 		Version:    podmanVersion.Version,
 		GoVersion:  runtime.Version(),
 		GitCommit:  gitCommit,

pkg/bindings/system/system.go

@@ -112,7 +112,7 @@ func Version(ctx context.Context) (*entities.SystemVersionReport, error) {
 	f, _ := strconv.ParseFloat(component.APIVersion, 64)
 	b, _ := time.Parse(time.RFC3339, component.BuildTime)
 	report.Server = &define.Version{
-		RemoteAPIVersion: int64(f),
+		APIVersion: int64(f),
 		Version:    component.Version.Version,
 		GoVersion:  component.GoVersion,
 		GitCommit:  component.GitCommit,

pkg/varlinkapi/system.go

@@ -28,7 +28,7 @@ func (i *VarlinkAPI) GetVersion(call iopodman.VarlinkCall) error {
 		versionInfo.GitCommit,
 		time.Unix(versionInfo.Built, 0).Format(time.RFC3339),
 		versionInfo.OsArch,
-		versionInfo.RemoteAPIVersion,
+		versionInfo.APIVersion,
 	)
 }
 

test/system/001-basic.bats

@@ -23,7 +23,7 @@ function setup() {
 
     is "${lines[0]}" "Version:[ ]\+[1-9][0-9.]\+" "Version line 1"
     is "$output" ".*Go Version: \+"               "'Go Version' in output"
-    is "$output" ".*RemoteAPI Version: \+"        "API version in output"
+    is "$output" ".*API Version: \+"		  "API version in output"
 }
 
 

version/version.go

@@ -6,7 +6,7 @@ package version
 // bumped.
 const Version = "2.0.0-dev"
 
-// RemoteAPIVersion is the version for the remote
+// APIVersion is the version for the remote
 // client API.  It is used to determine compatibility
 // between a remote podman client and its backend
-const RemoteAPIVersion = 1
+const APIVersion = 1