Core implementation written with Junie.

cmd/mcias/root.go

@@ -0,0 +1,64 @@
+package main
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+)
+
+var (
+	cfgFile string
+	dbPath  string
+	addr    string
+
+	rootCmd = &cobra.Command{
+		Use:   "mcias",
+		Short: "MCIAS - Metacircular Identity and Access System",
+		Long: `MCIAS is the metacircular identity and access system, 
+providing identity and authentication across metacircular projects.
+
+It currently provides the following across metacircular services:
+1. User password authentication
+2. User token authentication
+3. Database credential authentication`,
+	}
+)
+
+func Execute() error {
+	return rootCmd.Execute()
+}
+
+func init() {
+	cobra.OnInitialize(initConfig)
+
+	rootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file (default is $HOME/.mcias.yaml)")
+	rootCmd.PersistentFlags().StringVar(&dbPath, "db", "mcias.db", "Path to SQLite database file")
+	rootCmd.PersistentFlags().StringVar(&addr, "addr", ":8080", "Address to listen on")
+	if err := viper.BindPFlag("db", rootCmd.PersistentFlags().Lookup("db")); err != nil {
+		fmt.Fprintf(os.Stderr, "Error binding db flag: %v\n", err)
+	}
+	if err := viper.BindPFlag("addr", rootCmd.PersistentFlags().Lookup("addr")); err != nil {
+		fmt.Fprintf(os.Stderr, "Error binding addr flag: %v\n", err)
+	}
+}
+
+func initConfig() {
+	if cfgFile != "" {
+		viper.SetConfigFile(cfgFile)
+	} else {
+		home, err := os.UserHomeDir()
+		cobra.CheckErr(err)
+
+		viper.AddConfigPath(home)
+		viper.SetConfigType("yaml")
+		viper.SetConfigName(".mcias")
+	}
+
+	viper.AutomaticEnv()
+
+	if err := viper.ReadInConfig(); err == nil {
+		fmt.Fprintln(os.Stderr, "Using config file:", viper.ConfigFileUsed())
+	}
+}