Stub out fetching secret key entity

pkg/pkg.go

@@ -2,17 +2,25 @@ package pkg
 
 import (
 	"fmt"
+	"log"
 
+	"github.com/pkg/errors"
 	"mcquay.me/fs"
+	"mcquay.me/pm/keyring"
 )
 
 // Create traverses the contents of dir and emits a valid pkg, signed by id
-func Create(dir, id string) error {
+func Create(root, id, dir string) error {
 	if !fs.Exists(dir) {
 		return fmt.Errorf("%q: doesn't exist", dir)
 	}
 	if !fs.IsDir(dir) {
 		return fmt.Errorf("%q: is not a directory", dir)
 	}
+	e, err := keyring.FindSecretEntity(dir, id)
+	if err != nil {
+		return errors.Wrap(err, "find secret key")
+	}
+	log.Printf("found key: %v", e.PrimaryKey.KeyIdShortString())
 	return fmt.Errorf("creating package from %q for %q: NYI", dir, id)
 }