implement wicectl client to control the daemon via gRPC

Signed-off-by: Steffen Vogel <post@steffenvogel.de>

cmd/wicectl/root.go

@@ -0,0 +1,66 @@
+package main
+
+import (
+	"os"
+
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+	"go.uber.org/zap"
+	"riasc.eu/wice/internal"
+	"riasc.eu/wice/internal/cli"
+)
+
+var (
+	// Used for flags.
+	cfgFile  string
+	sockPath string
+
+	rootCmd = &cobra.Command{
+		Use:   "wicectl",
+		Short: "A client tool to control the WICE daemon",
+	}
+)
+
+func init() {
+	cobra.OnInitialize(
+		internal.SetupRand,
+		setupLogging,
+		setupConfig,
+	)
+
+	pf := rootCmd.PersistentFlags()
+
+	pf.StringVar(&sockPath, "socket", "/var/run/wice.sock", "Unix control and monitoring socket")
+	pf.StringVar(&cfgFile, "config", "", "Path to config file (default $HOME/.wice.yaml)")
+
+	viper.BindPFlag("socket", pf.Lookup("socket"))
+
+	rootCmd.AddCommand(shutdownCmd)
+	rootCmd.AddCommand(monitorCmd)
+	rootCmd.AddCommand(syncCmd)
+	rootCmd.AddCommand(cli.NewDocsCommand(rootCmd))
+}
+
+func setupLogging() {
+	logger = internal.SetupLogging()
+}
+
+func setupConfig() {
+	if cfgFile != "" {
+		// Use config file from the flag.
+		viper.SetConfigFile(cfgFile)
+	} else {
+		home, err := os.UserHomeDir()
+		cobra.CheckErr(err)
+
+		viper.AddConfigPath(home)
+		viper.SetConfigType("yaml")
+		viper.SetConfigName(".wice.yaml")
+	}
+
+	viper.AutomaticEnv()
+
+	if err := viper.ReadInConfig(); err == nil {
+		logger.Debug("Using config file", zap.String("file", viper.ConfigFileUsed()))
+	}
+}