kinflate: added version command

cmd/kinflate/version/version.go

@@ -0,0 +1,68 @@
+/*
+Copyright 2018 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package version
+
+import (
+	"fmt"
+	"io"
+
+	"github.com/spf13/cobra"
+)
+
+var (
+	kinflateVersion = "unknown"
+	goos            = "unknown"
+	goarch          = "unknown"
+	gitCommit       = "$Format:%H$" // sha1 from git, output of $(git rev-parse HEAD)
+
+	buildDate = "1970-01-01T00:00:00Z" // build date in ISO8601 format, output of $(date -u +'%Y-%m-%dT%H:%M:%SZ')
+)
+
+type Version struct {
+	KinflateVersion string `json:"kinflateVersion"`
+	GitCommit       string `json:"gitCommit"`
+	BuildDate       string `json:"buildDate"`
+	GoOs            string `json:"goOs"`
+	GoArch          string `json:"goArch"`
+}
+
+func GetVersion() Version {
+	return Version{
+		kinflateVersion,
+		gitCommit,
+		buildDate,
+		goos,
+		goarch,
+	}
+}
+
+func (v Version) Print(w io.Writer) {
+	fmt.Fprintf(w, "Version: %+v\n", v)
+}
+
+// NewCmdVersion makes version command.
+func NewCmdVersion(w io.Writer) *cobra.Command {
+	return &cobra.Command{
+		Use:     "version",
+		Short:   "Prints the kinflate version.",
+		Long:    `Prints the kinflate version.`,
+		Example: `kinflate version`,
+		Run: func(cmd *cobra.Command, args []string) {
+			GetVersion().Print(w)
+		},
+	}
+}

pkg/kinflate/commands/commands.go

@@ -22,6 +22,7 @@ import (
 	"os"
 
 	"github.com/spf13/cobra"
+	"k8s.io/kubectl/cmd/kinflate/version"
 	"k8s.io/kubectl/pkg/kinflate/util/fs"
 )
 
@@ -49,6 +50,8 @@ Find more information at:
 		newCmdAdd(stdOut, stdErr, fsys),
 		// 'set' sub command
 		newCmdSet(stdOut, stdErr, fsys),
+		// version command
+		version.NewCmdVersion(stdOut),
 	)
 
 	// add the glog flags