1 files changed, 6 insertions, 0 deletions
diff --git a/filter.go b/filter.go
index dec3cd8..d52b191 100644
--- a/filter.go
+++ b/filter.go
@@ -30,6 +30,8 @@ type Filter struct {
 
 	curCommitIn  libfastimport.CmdCommit
 	curCommitOut map[string]fullcommit
+
+	OnCommit func()
 }
 
 func NewFilter(fromRef string, toPfx string) (*Filter, error) {
@@ -191,6 +193,10 @@ func (f *Filter) Run() error {
 			// TODO: synthesize ABS-tree submodule commits
 			f.curCommitIn = libfastimport.CmdCommit{}
 			f.curCommitOut = nil
+
+			if f.OnCommit != nil {
+				f.OnCommit()
+			}
 		case libfastimport.FileModify:
 			branchname := filename2branchname(string(cmdt.Path))
 			if branchname == "" {