1 files changed, 21 insertions, 0 deletions
diff --git a/usd/git_repository.py b/usd/git_repository.py
index 614c26a..12f65ea 100644
--- a/usd/git_repository.py
+++ b/usd/git_repository.py
@@ -1,6 +1,7 @@
 ### XXX: can we reduce number of calls to dpkg-parsechangelog
 ### XXX: is any of this data in lp already?
 
+import copy
 from enum import Enum, unique
 import functools
 import logging
@@ -655,3 +656,23 @@ class USDGitRepository:
                           tag_name
                          )
             raise
+
+    def commit_tree_hash(self, tree_hash, parents, log_message,
+                         environment_spi=None):
+        commit_tree = ['git', 'commit-tree', tree_hash]
+
+        for parent in parents:
+            commit_tree.extend(['-p', parent])
+
+        commit_env = copy.copy(self.env)
+        if environment_spi:
+            commit_env.update(
+                self.get_commit_environment(tree_hash, environment_spi)
+            )
+        with tempfile.NamedTemporaryFile() as fp:
+            fp.write(log_message)
+            fp.flush()
+            commit_tree += ['-F', fp.name]
+            cp = run(commit_tree, env=commit_env)
+
+        return decode_binary(cp.stdout).strip()