Make sqlboiler respect environment

- Stop failing on config file load, use the validation in the test
  config stuff.

main.go

@@ -64,8 +64,10 @@ func main() {
 	rootCmd.PersistentFlags().StringP("output", "o", "models", "The name of the folder to output to")
 	rootCmd.PersistentFlags().StringP("pkgname", "p", "models", "The name you wish to assign to your generated package")
 
-	viper.SetDefault("postgres.sslmode", "required")
+	viper.SetDefault("postgres.sslmode", "require")
+	viper.SetDefault("postgres.port", "5432")
 	viper.BindPFlags(rootCmd.PersistentFlags())
+	viper.AutomaticEnv()
 
 	if err := rootCmd.Execute(); err != nil {
 		if e, ok := err.(commandFailure); ok {

templates_test/main_test/postgres_main.tpl

@@ -115,7 +115,8 @@ func setup() error {
 		return fmt.Errorf("Unable to load config file: %s", err)
 	}
 
-	viper.SetDefault("postgres.sslmode", "required")
+	viper.SetDefault("postgres.sslmode", "require")
+	viper.SetDefault("postgres.port", "5432")
 
 	// Create a randomized test configuration object.
 	testCfg.Postgres.Host = viper.GetString("postgres.host")

templates_test/singleton/boil_main_helpers.tpl

@@ -29,10 +29,9 @@ func InitViper() error {
 		viper.AddConfigPath(p)
 	}
 
-	err = viper.ReadInConfig()
-  if err != nil {
-    return err
-  }
+	// Ignore errors here, fall back to defaults and validation to provide errs
+	_ = viper.ReadInConfig()
+	viper.AutomaticEnv()
 
 	return nil
 }