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lib: Use database features to drive upgrade

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Previously, we had database version information hard-coded in the
upgrade code.  Slightly re-organize the upgrade process around the set
of new database features to be enabled by the upgrade.
This commit is contained in:
Austin Clements 2014-08-25 13:26:04 -04:00 committed by David Bremner
parent 4a38588488
commit 48db8c8b60
1 changed files with 13 additions and 11 deletions
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24
lib/database.cc
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@ -1202,11 +1202,12 @@ notmuch_database_upgrade (notmuch_database_t *notmuch,
void *closure)
{
void *local = talloc_new (NULL);
Xapian::TermIterator t, t_end;
Xapian::WritableDatabase *db;
struct sigaction action;
struct itimerval timerval;
notmuch_bool_t timer_is_active = FALSE;
unsigned int version;
enum _notmuch_features target_features, new_features;
notmuch_status_t status;
unsigned int count = 0, total = 0;
@ -1216,9 +1217,10 @@ notmuch_database_upgrade (notmuch_database_t *notmuch,
db = static_cast <Xapian::WritableDatabase *> (notmuch->xapian_db);
version = notmuch_database_get_version (notmuch);
target_features = notmuch->features | NOTMUCH_FEATURES_CURRENT;
new_features = NOTMUCH_FEATURES_CURRENT & ~notmuch->features;
if (version >= NOTMUCH_DATABASE_VERSION)
if (! new_features)
return NOTMUCH_STATUS_SUCCESS;
if (progress_notify) {
@ -1244,18 +1246,17 @@ notmuch_database_upgrade (notmuch_database_t *notmuch,
/* Set the target features so we write out changes in the desired
* format. */
notmuch->features |= NOTMUCH_FEATURES_CURRENT;
notmuch->features = target_features;
/* Before version 1, each message document had its filename in the
* data field. Copy that into the new format by calling
* notmuch_message_add_filename.
*/
if (version < 1) {
if (new_features & NOTMUCH_FEATURE_FILE_TERMS) {
notmuch_query_t *query = notmuch_query_create (notmuch, "");
notmuch_messages_t *messages;
notmuch_message_t *message;
char *filename;
Xapian::TermIterator t, t_end;
total = notmuch_query_count_messages (query);
@ -1284,11 +1285,12 @@ notmuch_database_upgrade (notmuch_database_t *notmuch,
}
notmuch_query_destroy (query);
}
/* Also, before version 1 we stored directory timestamps in
* XTIMESTAMP documents instead of the current XDIRECTORY
* documents. So copy those as well. */
/* Also, before version 1 we stored directory timestamps in
* XTIMESTAMP documents instead of the current XDIRECTORY
* documents. So copy those as well. */
if (new_features & NOTMUCH_FEATURE_DIRECTORY_DOCS) {
t_end = notmuch->xapian_db->allterms_end ("XTIMESTAMP");
for (t = notmuch->xapian_db->allterms_begin ("XTIMESTAMP");
@ -1332,7 +1334,7 @@ notmuch_database_upgrade (notmuch_database_t *notmuch,
* stemmed. Change it to the current boolean prefix. Add "path:"
* prefixes while at it.
*/
if (version < 2) {
if (new_features & NOTMUCH_FEATURE_BOOL_FOLDER) {
notmuch_query_t *query = notmuch_query_create (notmuch, "");
notmuch_messages_t *messages;
notmuch_message_t *message;