refactor command package to remove globals and add dependency injection

cmd/syft/cli/options/root.go

@@ -0,0 +1,36 @@
+package options
+
+import (
+	"github.com/spf13/cobra"
+	"github.com/spf13/pflag"
+	"github.com/spf13/viper"
+)
+
+type RootOptions struct {
+	Config  string
+	Quiet   bool
+	Verbose int
+}
+
+var _ Interface = (*RootOptions)(nil)
+
+func (o *RootOptions) AddFlags(cmd *cobra.Command, v *viper.Viper) error {
+	cmd.PersistentFlags().StringVarP(&o.Config, "config", "c", "", "application config file")
+	cmd.PersistentFlags().CountVarP(&o.Verbose, "verbose", "v", "increase verbosity (-v = info, -vv = debug)")
+	cmd.PersistentFlags().BoolVarP(&o.Quiet, "quiet", "q", false, "suppress all logging output")
+
+	return bindRootConfigOptions(cmd.PersistentFlags(), v)
+}
+
+func bindRootConfigOptions(flags *pflag.FlagSet, v *viper.Viper) error {
+	if err := v.BindPFlag("config", flags.Lookup("config")); err != nil {
+		return err
+	}
+	if err := v.BindPFlag("verbosity", flags.Lookup("verbose")); err != nil {
+		return err
+	}
+	if err := v.BindPFlag("quiet", flags.Lookup("quiet")); err != nil {
+		return err
+	}
+	return nil
+}