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lib: Implement upgrade to ghost messages feature

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Somehow this is the first upgrade pass that actually does *any* error
checking, so this also adds the bit of necessary infrastructure to
handle that.
This commit is contained in:
Austin Clements 2014-10-23 08:30:38 -04:00 committed by David Bremner
parent 58a4277d3b
commit d1e8c80b72
1 changed files with 64 additions and 2 deletions
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64
lib/database.cc
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@ -1231,6 +1231,7 @@ notmuch_database_upgrade (notmuch_database_t *notmuch,
notmuch_bool_t timer_is_active = FALSE;
enum _notmuch_features target_features, new_features;
notmuch_status_t status;
notmuch_private_status_t private_status;
unsigned int count = 0, total = 0;
status = _notmuch_database_ensure_writable (notmuch);
@ -1275,6 +1276,13 @@ notmuch_database_upgrade (notmuch_database_t *notmuch,
for (t = db->allterms_begin ("XTIMESTAMP"); t != t_end; t++)
++total;
}
if (new_features & NOTMUCH_FEATURE_GHOSTS) {
/* The ghost message upgrade converts all thread_id_*
* metadata values into ghost message documents. */
t_end = db->metadata_keys_end ("thread_id_");
for (t = db->metadata_keys_begin ("thread_id_"); t != t_end; ++t)
++total;
}
/* Perform the upgrade in a transaction. */
db->begin_transaction (true);
@ -1378,10 +1386,64 @@ notmuch_database_upgrade (notmuch_database_t *notmuch,
}
}
/* Perform metadata upgrades. */
/* Prior to NOTMUCH_FEATURE_GHOSTS, thread IDs for missing
* messages were stored as database metadata. Change these to
* ghost messages.
*/
if (new_features & NOTMUCH_FEATURE_GHOSTS) {
notmuch_message_t *message;
std::string message_id, thread_id;
t_end = db->metadata_keys_end (NOTMUCH_METADATA_THREAD_ID_PREFIX);
for (t = db->metadata_keys_begin (NOTMUCH_METADATA_THREAD_ID_PREFIX);
t != t_end; ++t) {
if (do_progress_notify) {
progress_notify (closure, (double) count / total);
do_progress_notify = 0;
}
message_id = (*t).substr (
strlen (NOTMUCH_METADATA_THREAD_ID_PREFIX));
thread_id = db->get_metadata (*t);
/* Create ghost message */
message = _notmuch_message_create_for_message_id (
notmuch, message_id.c_str (), &private_status);
if (private_status == NOTMUCH_PRIVATE_STATUS_SUCCESS) {
/* Document already exists; ignore the stored thread ID */
} else if (private_status ==
NOTMUCH_PRIVATE_STATUS_NO_DOCUMENT_FOUND) {
private_status = _notmuch_message_initialize_ghost (
message, thread_id.c_str ());
if (! private_status)
_notmuch_message_sync (message);
}
if (private_status) {
fprintf (stderr,
"Upgrade failed while creating ghost messages.\n");
status = COERCE_STATUS (private_status, "Unexpected status from _notmuch_message_initialize_ghost");
goto DONE;
}
/* Clear saved metadata thread ID */
db->set_metadata (*t, "");
++count;
}
}
status = NOTMUCH_STATUS_SUCCESS;
db->set_metadata ("features", _print_features (local, notmuch->features));
db->set_metadata ("version", STRINGIFY (NOTMUCH_DATABASE_VERSION));
DONE:
if (status == NOTMUCH_STATUS_SUCCESS)
db->commit_transaction ();
else
db->cancel_transaction ();
if (timer_is_active) {
/* Now stop the timer. */
@ -1397,7 +1459,7 @@ notmuch_database_upgrade (notmuch_database_t *notmuch,
}
talloc_free (local);
return NOTMUCH_STATUS_SUCCESS;
return status;
}
notmuch_status_t