[#131] authmate: Make authmate use cobra

Signed-off-by: Denis Kirillov <d.kirillov@yadro.com>

cmd/s3-authmate/modules/root.go

@@ -0,0 +1,56 @@
+package modules
+
+import (
+	"context"
+	"runtime"
+	"strings"
+	"time"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/internal/version"
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+)
+
+// rootCmd represents the base command when called without any subcommands.
+var rootCmd = &cobra.Command{
+	Use:           "frostfs-s3-authmate",
+	Version:       version.Version,
+	Short:         "FrostFS S3 Authmate",
+	Long:          "Helps manage delegated access via gates to data stored in FrostFS network",
+	Example:       "frostfs-s3-authmate --version",
+	SilenceErrors: true,
+	SilenceUsage:  true,
+	PersistentPreRunE: func(cmd *cobra.Command, _ []string) error {
+		viper.AutomaticEnv()
+		viper.SetEnvPrefix("AUTHMATE")
+		viper.SetEnvKeyReplacer(strings.NewReplacer(".", "_"))
+		viper.AllowEmptyEnv(true)
+
+		return viper.BindPFlags(cmd.Flags())
+	},
+	RunE: func(cmd *cobra.Command, _ []string) error {
+		return cmd.Help()
+	},
+}
+
+const (
+	withLogFlag = "with-log"
+	debugFlag   = "debug"
+	timeoutFlag = "timeout"
+)
+
+func Execute(ctx context.Context) (*cobra.Command, error) {
+	return rootCmd.ExecuteContextC(ctx)
+}
+
+func init() {
+	rootCmd.PersistentFlags().Bool(withLogFlag, false, "Enable logger")
+	rootCmd.PersistentFlags().Bool(debugFlag, false, "Enable debug logger level")
+	rootCmd.PersistentFlags().Duration(timeoutFlag, time.Minute, "Timeout of processing of the command, for example 2m (note: max time unit is an hour so to set a day you should use 24h)")
+
+	cobra.AddTemplateFunc("runtimeVersion", runtime.Version)
+	rootCmd.SetVersionTemplate(`Frostfs S3 Authmate
+{{printf "Version: %s" .Version }}
+GoVersion: {{ runtimeVersion }}
+`)
+}