root.go

/*
 * Copyright © 2023 omegarogue
 * SPDX-License-Identifier: AGPL-3.0-or-later
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <https://www.gnu.org/licenses/>.
 */

package cmd

import (
	"fmt"
	"os"

	"github.com/rs/zerolog/log"
	"github.com/spf13/cobra"
	"github.com/spf13/viper"
)

var (
	cfgFile string
	rootCmd = NewRootCmd()
)

func GetRootCmd() *cobra.Command {
	return rootCmd
}

// NewRootCmd returns a new command which
// represents the base command when called without any subcommands
// TODO add description
func NewRootCmd() *cobra.Command {
	rootCmd := &cobra.Command{
		Use:   "weylus-desktop",
		Short: "weylus-desktop is a remote-desktop program for stylus/touch input and gaming.",
		Long:  `weylus-desktop is a remote-desktop program for stylus/touch input and gaming.`,
		//Run: func(cmd *cobra.Command, args []string) { },
	}

	// Here you will define your flags and configuration settings.
	// Cobra supports persistent flags, which, if defined here,
	// will be global for your application.

	rootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file (default is $HOME/.weylus-desktop.yaml)")

	return rootCmd
}

// Execute adds all child commands to the root command and sets flags appropriately.
// This is called by main.main(). It only needs to happen once to the rootCmd.
func Execute() {
	err := rootCmd.Execute()
	if err != nil {
		log.Fatal().Err(err).Msg("exit with error")
	}
}

func init() {
	cobra.OnInitialize(initConfig)
}

// initConfig reads in config file and ENV variables if set.
func initConfig() {
	if cfgFile != "" {
		// Use config file from the flag.
		viper.SetConfigFile(cfgFile)
	} else {
		// Find home directory.
		home, err := os.UserHomeDir()
		cobra.CheckErr(err)

		// Search config in home directory with name ".weylus-desktop" (without extension).
		viper.AddConfigPath(home)
		viper.SetConfigType("yaml")
		viper.SetConfigName(".weylus-desktop")
	}

	viper.AutomaticEnv() // read in environment variables that match

	// If a config file is found, read it in.
	if err := viper.ReadInConfig(); err == nil {
		_, err := fmt.Fprintln(os.Stderr, "Using config file:", viper.ConfigFileUsed())
		if err != nil {
			log.Err(err).Msg("print config file location")
		}
	}
}