Complete project pivot (#55)

Complete project pivot

cmd/portal/cli/init.go

@@ -0,0 +1,59 @@
+package cli
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+
+	"github.com/apex/log"
+	"github.com/pelletier/go-toml"
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+)
+
+func init() {
+	initCmd.Flags().BoolP("print", "p", false, "Print default config to stdout")
+}
+
+var initCmd = &cobra.Command{
+	Use:   "init",
+	Short: "Initialize portal",
+	RunE: func(cmd *cobra.Command, args []string) error {
+		print, err := cmd.Flags().GetBool("print")
+		if err != nil {
+			return err
+		}
+
+		if print {
+			c := viper.AllSettings()
+			bs, err := toml.Marshal(c)
+			if err != nil {
+				return fmt.Errorf("unable to marshal config: %v", err)
+			}
+
+			fmt.Println(string(bs))
+			return nil
+		}
+
+		dir := filepath.Dir(cfgFile)
+		if _, err := os.Stat(dir); os.IsNotExist(err) {
+			err = os.Mkdir(dir, 0755)
+			if err != nil {
+				return err
+			}
+		}
+
+		err = viper.SafeWriteConfigAs(cfgFile)
+		if err != nil {
+			if _, ok := err.(viper.ConfigFileAlreadyExistsError); !ok {
+				return fmt.Errorf("couldn't save config at \"%s\" (%s)", viper.ConfigFileUsed(), err)
+			}
+		} else {
+			log.Infof("Your config was saved at \"%s\"", viper.ConfigFileUsed())
+			return nil
+		}
+
+		log.Infof("Config already exists at \"%s\", no changes applied", viper.ConfigFileUsed())
+		return nil
+	},
+}