feat: added root, download, list, and serve cmd implementations

cmd/root.go

@@ -3,21 +3,38 @@ package cmd
 import (
 	"fmt"
 	"os"
+	"slices"
+	"strings"
 
+	"github.com/rs/zerolog"
+	"github.com/rs/zerolog/log"
 	"github.com/spf13/cobra"
 )
 
+var (
+	host       string
+	path       string
+	outputPath string
+	rootPath   string
+	logLevel   string
+	timeout    int
+)
 var rootCmd = cobra.Command{
-	Use: "configurator",
-	Run: func(cmd *cobra.Command, args []string) {
-
+	Use:   "configurator",
+	Short: "Extensible configuration builder to download files",
+	PersistentPreRun: func(cmd *cobra.Command, args []string) {
+		// set the logging level
+		level, err := strToLogLevel(logLevel)
+		if err != nil {
+			log.Error().Err(err).Msg("failed to convert log level argument")
+			os.Exit(1)
+		}
+		zerolog.SetGlobalLevel(level)
 	},
 }
 
 func Execute() {
-	// run initialization code first
-	initEnv()
-
+	// run the main program
 	if err := rootCmd.Execute(); err != nil {
 		fmt.Fprintln(os.Stderr, err)
 		os.Exit(1)
@@ -26,12 +43,34 @@ func Execute() {
 
 func init() {
 	// initialize the config a single time
+	rootCmd.PersistentFlags().StringVarP(&logLevel, "log-level", "l", "info", "Set the log level output")
 }
 
-func initConfigFromFile(path string) {
-
+func strToLogLevel(ll string) (zerolog.Level, error) {
+	levels := []string{"debug", "info", "warn", "disabled"}
+	if index := slices.Index(levels, ll); index >= 0 {
+		// handle special case to map index == 3 to zerolog.Disabled == 7
+		switch index {
+		case 3:
+			return zerolog.Disabled, nil
+		}
+		return zerolog.Level(index), nil
+	}
+	return -100, fmt.Errorf(
+		"invalid log level (options: %s)", strings.Join(levels, ", "),
+	) // use 'info' by default
 }
 
-func initEnv() {
-
+func setenv(v *string, key string) {
+	t := os.Getenv(key)
+	if t != "" {
+		*v = t
+	}
 }
+
+// func setenv(cmd *cobra.Command, varname string, envvar string) {
+// 	v := os.Getenv(envvar)
+// 	if v != "" {
+// 		cmd.Flags().Set(varname, v)
+// 	}
+// }