add version flag

Co-authored-by: anton.voskresensky <anton.voskresensky@flant.com>

Author: perhamm

.github/workflows/docker.yml

@@ -46,7 +46,7 @@ jobs:
       with:
         context: .
         build-args: |
-          versionflags=-X 'github.com/flant/osctl/pkg/util.Version=${{ github.ref_name }}' -X 'github.com/flant/osctl/pkg/util.Revision=${{ github.sha }}' -X 'github.com/flant/osctl/pkg/util.Branch=${{ github.ref_name }}' -X 'github.com/flant/osctl/pkg/util.BuildUser=${{ github.actor }}' -X 'github.com/flant/osctl/pkg/util.BuildDate=${{ env.BUILD_DATE }}'
+          versionflags=-X 'osctl/cmd/main.appVersion=${{ github.ref_name }}'
         push: ${{ github.event_name != 'pull_request' }}
         tags: ${{ steps.meta.outputs.tags }}
         labels: ${{ steps.meta.outputs.labels }}

.github/workflows/go.yml

@@ -20,7 +20,7 @@ jobs:
 
     - name: Build
       run: |
-        versionflags="-X 'github.com/flant/osctl/pkg/util.Version=$GITHUB_REF_NAME' -X 'github.com/flant/osctl/pkg/util.Revision=$GITHUB_SHA' -X 'github.com/flant/osctl/pkg/util.Branch=$GITHUB_REF_NAME' -X 'github.com/flant/osctl/pkg/util.BuildUser=$GITHUB_ACTOR' -X 'github.com/flant/osctl/pkg/util.BuildDate=$(date +%Y%m%d%H%M)'"
+        versionflags="-X 'osctl/cmd/main.appVersion=${{ github.ref_name }}'"
         for GOOS in linux; do
           for GOARCH in amd64 arm64; do
             export GOOS GOARCH

Dockerfile

@@ -42,6 +42,7 @@ RUN chmod +x /app/osctl
 
 ENV PATH="/app:${PATH}"
 
+RUN mkdir -p /etc/bash_completion.d
 RUN /app/osctl completion bash > /etc/bash_completion.d/osctl
 
 RUN echo '[ -f /etc/bash_completion ] && . /etc/bash_completion' >> /etc/bash.bashrc

cmd/main.go

@@ -1,17 +1,26 @@
 package main
 
 import (
+	"fmt"
 	"os"
 
 	"osctl/commands"
 )
 
 var (
-	vBuild string
+	appVersion string
 )
 
 func main() {
-	if err := commands.Execute(); err != nil {
+	if len(os.Args) > 1 && (os.Args[1] == "--version" || os.Args[1] == "-v") {
+		if appVersion == "" {
+			appVersion = "dev"
+		}
+		fmt.Println(appVersion)
+		os.Exit(0)
+	}
+
+	if err := commands.Execute(appVersion); err != nil {
 		os.Exit(1)
 	}
 }

commands/root.go

@@ -3,16 +3,20 @@ package commands
 import (
 	"fmt"
 	"osctl/pkg/config"
+	"osctl/pkg/logging"
 
 	"github.com/spf13/cobra"
 )
 
+var (
+	appVersion = ""
+)
+
 var rootCmd = &cobra.Command{
 	Use:   "osctl",
 	Short: "OpenSearch indices lifecycle management tool",
 	Long:  `osctl is a tool for managing OpenSearch cluster indices lifecycle.`,
 	RunE: func(cmd *cobra.Command, args []string) error {
-
 		actionFlag, _ := cmd.Flags().GetString("action")
 		if actionFlag != "" {
 			if err := config.ValidateAction(actionFlag); err != nil {
@@ -44,7 +48,16 @@ var rootCmd = &cobra.Command{
 	},
 }
 
-func Execute() error {
+func Execute(version string) error {
+	appVersion = version
+	if appVersion == "" {
+		appVersion = "dev"
+	}
+	rootCmd.Version = appVersion
+
+	logger := logging.NewLogger()
+	logger.Info(fmt.Sprintf("osctl version=%s", appVersion))
+
 	rootCmd.PersistentPreRunE = func(cmd *cobra.Command, args []string) error {
 		commandName := cmd.Name()
 		if commandName == "osctl" {
@@ -106,6 +119,8 @@ func executeActionCommand(action string, args []string) error {
 func init() {
 	addFlags(rootCmd)
 	rootCmd.SilenceUsage = true
+	rootCmd.Flags().BoolP("version", "v", false, "Print version information")
+	rootCmd.SetVersionTemplate("{{.Version}}\n")
 	commands := []*cobra.Command{
 		snapshotCmd,
 		snapshotManualCmd,