From 96d21a7b501e453376be19c426059e8c392a8173 Mon Sep 17 00:00:00 2001
From: Lars Wirzenius <liw@liw.fi>
Date: Thu, 17 Mar 2016 18:30:37 +0200
Subject: Store/use checksum algorithm in per-client data

---
 obnamlib/fmt_ga/client.py | 11 ++++++++++-
 obnamlib/fmt_ga/format.py |  9 +++++++--
 2 files changed, 17 insertions(+), 3 deletions(-)

diff --git a/obnamlib/fmt_ga/client.py b/obnamlib/fmt_ga/client.py
index 8ea4b549..b204c720 100644
--- a/obnamlib/fmt_ga/client.py
+++ b/obnamlib/fmt_ga/client.py
@@ -32,6 +32,7 @@ class GAClient(object):
         self._dirname = None
         self._client_name = client_name
         self._current_time = None
+        self._default_checksum_algorithm = None
         self.clear()
 
     def clear(self):
@@ -41,6 +42,7 @@ class GAClient(object):
         self._data_is_loaded = False
         self._dir_cache_size = obnamlib.DEFAULT_DIR_CACHE_BYTES
         self._dir_bag_size = obnamlib.DEFAULT_DIR_BAG_BYTES
+        self._checksum_algorithm = None
 
     def set_current_time(self, current_time):
         self._current_time = current_time
@@ -48,6 +50,9 @@ class GAClient(object):
     def set_fs(self, fs):
         self._fs = fs
 
+    def set_default_checksum_algorithm(self, name):
+        self._default_checksum_algorithm = name
+
     def set_dir_bag_size(self, size):
         self._dir_bag_size = size
         if self._blob_store:
@@ -99,6 +104,7 @@ class GAClient(object):
 
     def _save_per_client_data(self):
         data = {
+            'whole-file-checksum': self._checksum_algorithm,
             'keys': self._client_keys.as_dict(),
             'generations': [g.as_dict() for g in self._generations],
         }
@@ -116,8 +122,11 @@ class GAClient(object):
     def _load_per_client_data(self):
         blob_store = self._get_blob_store()
         blob = blob_store.get_well_known_blob(self._well_known_blob)
-        if blob is not None:
+        if blob is None:
+            self._checksum_algorithm = self._default_checksum_algorithm
+        else:
             data = obnamlib.deserialise_object(blob)
+            self._checksum_algorithm = data['whole-file-checksum']
             self._client_keys.set_from_dict(data['keys'])
             for gen_dict in data['generations']:
                 gen = GAGeneration()
diff --git a/obnamlib/fmt_ga/format.py b/obnamlib/fmt_ga/format.py
index dfda1cc0..8e4b787b 100644
--- a/obnamlib/fmt_ga/format.py
+++ b/obnamlib/fmt_ga/format.py
@@ -27,10 +27,10 @@ class RepositoryFormatGA(obnamlib.RepositoryDelegator):
         obnamlib.RepositoryDelegator.__init__(self, **kwargs)
 
         self.set_client_list_object(obnamlib.GAClientList())
-        self.set_client_factory(obnamlib.GAClient)
+        self.set_client_factory(self._client_factory)
 
         self.set_chunk_indexes_object(obnamlib.GAChunkIndexes())
-        assert 'checksum_algorithm' in kwargs
+        self._checksum_algorithm = kwargs['checksum_algorithm']
         self._chunk_indexes.set_default_checksum_algorithm(
             kwargs['checksum_algorithm'])
 
@@ -41,6 +41,11 @@ class RepositoryFormatGA(obnamlib.RepositoryDelegator):
             chunk_store.set_chunk_cache_size(kwargs['chunk_cache_size'])
         self.set_chunk_store_object(chunk_store)
 
+    def _client_factory(self, client_name):
+        client = obnamlib.GAClient(client_name)
+        client.set_default_checksum_algorithm(self._checksum_algorithm)
+        return client
+
     def init_repo(self):
         pass
 
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