1 files changed, 18 insertions, 0 deletions
diff --git a/third_party/python/python-hglib/hglib/error.py b/third_party/python/python-hglib/hglib/error.py
new file mode 100644
index 0000000000..e0652dc74d
--- /dev/null
+++ b/third_party/python/python-hglib/hglib/error.py
@@ -0,0 +1,18 @@
+class CommandError(Exception):
+    def __init__(self, args, ret, out, err):
+        self.args = args
+        self.ret = ret
+        self.out = out
+        self.err = err
+
+    def __str__(self):
+        return str((self.ret, self.out.rstrip(), self.err.rstrip()))
+
+class ServerError(Exception):
+    pass
+
+class ResponseError(ServerError, ValueError):
+    pass
+
+class CapabilityError(ServerError):
+    pass