Free Git objects via finalizers or manually

Provide a manual way of freeing objects, but set finalizers for them
in case the user does not want to worry about memory management, which
would be useful for commits or trees, which sare typically small.

When the objects are freed manually, the finalizer is unset to avoid
double-freeing, mimicking what the go runtime does.

1 files changed, 3 insertions, 0 deletions

diff --git a/commit.go b/commit.go
index 855ed87..779ebd7 100644
--- a/commit.go
+++ b/commit.go
@@ -9,6 +9,7 @@ extern int _go_git_treewalk(git_tree *tree, git_treewalk_mode mode, void *ptr);
 import "C"
 
 import (
+	"runtime"
 	"time"
 )
 
@@ -32,6 +33,8 @@ func (c *Commit) Tree() (*Tree, error) {
 	if err < 0 {
 		return nil, LastError()
 	}
+
+	runtime.SetFinalizer(tree, (*Tree).Free)
 	return tree, nil
 }