admin: Create a GitImporter based on git binaries

admin/sync/importer_git_common.go

@@ -0,0 +1,39 @@
+package sync
+
+import (
+	"bufio"
+	"os"
+)
+
+func countFileInDir(dirname string) (int, error) {
+	files, err := os.ReadDir(dirname)
+	if err != nil {
+		return 0, err
+	}
+
+	return len(files), nil
+}
+
+func (i GitImporter) exists(filename string) bool {
+	return i.li.exists(filename)
+}
+
+func (i GitImporter) toURL(filename string) string {
+	return i.li.toURL(filename)
+}
+
+func (i GitImporter) importFile(URI string, next func(string, string) (interface{}, error)) (interface{}, error) {
+	return i.li.importFile(URI, next)
+}
+
+func (i GitImporter) getFile(filename string, writer *bufio.Writer) error {
+	return i.li.getFile(filename, writer)
+}
+
+func (i GitImporter) listDir(filename string) ([]string, error) {
+	return i.li.listDir(filename)
+}
+
+func (i GitImporter) stat(filename string) (os.FileInfo, error) {
+	return i.li.stat(filename)
+}