git-checkout-history: Put duplicated code in utils.go

Extract code that was duplicated from checkout-history-store so that it
now lives in a single place: the utils.go file.

Add a new function to utils.go that returns the list of branches in
history so that we can grab this for git-checkout-history.

1 files changed, 17 insertions, 0 deletions

diff --git a/utils/utils.go b/utils/utils.go
index 8efe6d2..01e2556 100644
--- a/utils/utils.go
+++ b/utils/utils.go
@@ -63,3 +63,20 @@ func Store(branch string) {
 		log.Fatal(err)
 	}
 }
+
+func Branches() []string {
+	branchList := BranchList{}
+	
+	file_path := getHomeDir() + "/" + history_file
+	data, err := ioutil.ReadFile(file_path)
+	if err != nil {
+		log.Fatal(err)
+	}
+	
+	err = yaml.Unmarshal(data, &branchList)
+	if err != nil {
+		log.Fatal(err)
+	}
+	
+	return branchList.Branches
+}