Add a basic branch iterator for getting branches state

branch.go

@@ -0,0 +1,36 @@
+package main
+
+import (
+	"fmt"
+
+	git "github.com/libgit2/git2go/v30"
+	"github.com/pkg/errors"
+)
+
+type BranchStatus struct {
+	Name        string
+	IsRemote    bool
+	HasUpstream bool
+	NeedsPull   bool
+	NeedsPush   bool
+}
+
+func Branches(repo *git.Repository) ([]*git.Branch, error) {
+	it, err := repo.NewBranchIterator(git.BranchAll)
+	if err != nil {
+		return nil, errors.Wrap(err, "Failed creating branch iterator")
+	}
+
+	it.ForEach(func(branch *git.Branch, branchType git.BranchType) error {
+		fmt.Print(branch.IsRemote())
+		upstream, err := branch.Upstream()
+		if err != nil {
+			fmt.Println(err.Error())
+		} else {
+			fmt.Println(upstream.Name())
+		}
+		return nil
+	})
+
+	return nil, nil
+}