Add a version command

commands/root.go

@@ -1,6 +1,7 @@
 package commands
 
 import (
+	log "github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
 )
 
@@ -20,6 +21,8 @@ func init() {
 }
 
 // Execute executes the root command.
-func Execute() error {
-	return rootCmd.Execute()
+func Execute() {
+	if err:= rootCmd.Execute(); err != nil {
+		log.WithError(err).Fatal("Could not execute command.")
+	}
 }

commands/version.go

@@ -0,0 +1,30 @@
+package commands
+
+import (
+	"fmt"
+	"github.com/spf13/cobra"
+	"os"
+)
+
+var (
+	Version string
+	Commit string
+	Date string
+)
+
+func init() {
+	rootCmd.AddCommand(versionCmd)
+}
+
+var versionCmd = &cobra.Command{
+	Use:   "version",
+	Short: "Print the version and exit",
+	Long:  `Print the version and exit`,
+	Run: func(cmd *cobra.Command, args []string) {
+
+		fmt.Println("version =", Version)
+		fmt.Println("commit =", Commit)
+		fmt.Println("date =", Date)
+		os.Exit(0)
+	},
+}

main.go

@@ -1,7 +1,41 @@
 package main
 
-import "github.com/appuio/image-cleanup/commands"
+import (
+	"github.com/appuio/image-cleanup/commands"
+	"os"
+
+	log "github.com/sirupsen/logrus"
+)
+
+var (
+	version = "latest"
+	commit  = "snapshot"
+	date    = "unknown"
+)
 
 func main() {
+	commands.Version = version
+	commands.Commit = commit
+	commands.Date = date
+
+	ConfigureLogging()
 	commands.Execute()
 }
+
+func ConfigureLogging() {
+
+	log.SetFormatter(&log.TextFormatter{
+		FullTimestamp: true,
+	})
+
+	log.SetOutput(os.Stdout)
+
+	//TODO: To make this configurable via flag
+	level, err := log.ParseLevel("debug")
+	if err != nil {
+		log.WithField("error", err).Warn("Using info level.")
+		log.SetLevel(log.InfoLevel)
+	} else {
+		log.SetLevel(level)
+	}
+}