env: scan package only if its not exist in local system

This minimize freeze operations, removing unneeded fetching revision
(tag/commit) and parsing remote URL.

1 files changed, 5 insertions, 2 deletions

diff --git a/env.go b/env.go
index 79349d4..130c648 100644
--- a/env.go
+++ b/env.go
@@ -187,6 +187,11 @@ func (env *Env) Freeze() (err error) {
 			return
 		}
 		if localPkg == nil {
+			err = pkg.Scan()
+			if err != nil {
+				return
+			}
+
 			err = pkg.Install()
 			if err != nil {
 				return
@@ -266,8 +271,6 @@ func (env *Env) GetLocalPackage(importPath string) (pkg *Package, err error) {
 		return
 	}
 
-	err = pkg.Scan()
-
 	return
 }