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new: Synchronize maildir flags eagerly.

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Because flag synchronization is stateless, it can be performed at any
time as long as it's guaranteed to be performed after any change to a
message's filename list.  Take advantage of this to synchronize tags
immediately after a filename is added or removed.

This does not yet make adding or removing a message atomic, but it is
a big step toward atomicity because it reduces the window where the
database tags are inconsistent from nearly the entire notmuch-new to
just around when the message is added or removed.
This commit is contained in:
Austin Clements 2011-01-27 20:51:04 -05:00 committed by David Bremner
parent 191c4ae693
commit 8305f0aac7
1 changed files with 8 additions and 34 deletions
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42
notmuch-new.c
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@ -50,7 +50,6 @@ typedef struct {
_filename_list_t *directory_mtimes;
notmuch_bool_t synchronize_flags;
_filename_list_t *message_ids_to_sync;
} add_files_state_t;
static volatile sig_atomic_t do_print_progress = 0;
@ -465,11 +464,8 @@ add_files_recursive (notmuch_database_t *notmuch,
break;
/* Non-fatal issues (go on to next file) */
case NOTMUCH_STATUS_DUPLICATE_MESSAGE_ID:
/* Defer sync of maildir flags until after old filenames
* are removed in the case of a rename. */
if (state->synchronize_flags == TRUE)
_filename_list_add (state->message_ids_to_sync,
notmuch_message_get_message_id (message));
notmuch_message_maildir_flags_to_tags (message);
break;
case NOTMUCH_STATUS_FILE_NOT_EMAIL:
fprintf (stderr, "Note: Ignoring non-mail file: %s\n",
@ -731,11 +727,16 @@ remove_filename (notmuch_database_t *notmuch,
add_files_state_t *add_files_state)
{
notmuch_status_t status;
notmuch_message_t *message;
message = notmuch_database_find_message_by_filename (notmuch, path);
status = notmuch_database_remove_message (notmuch, path);
if (status == NOTMUCH_STATUS_DUPLICATE_MESSAGE_ID)
if (status == NOTMUCH_STATUS_DUPLICATE_MESSAGE_ID) {
add_files_state->renamed_messages++;
else
if (add_files_state->synchronize_flags == TRUE)
notmuch_message_maildir_flags_to_tags (message);
} else
add_files_state->removed_messages++;
notmuch_message_destroy (message);
return status;
}
@ -810,7 +811,6 @@ notmuch_new_command (void *ctx, int argc, char *argv[])
add_files_state.new_tags = notmuch_config_get_new_tags (config, &add_files_state.new_tags_length);
add_files_state.synchronize_flags = notmuch_config_get_maildir_synchronize_flags (config);
add_files_state.message_ids_to_sync = _filename_list_create (ctx);
db_path = notmuch_config_get_database_path (config);
dot_notmuch_path = talloc_asprintf (ctx, "%s/%s", db_path, ".notmuch");
@ -911,32 +911,6 @@ notmuch_new_command (void *ctx, int argc, char *argv[])
talloc_free (add_files_state.removed_directories);
talloc_free (add_files_state.directory_mtimes);
/* Now that removals are done (hence the database is aware of all
* renames), we can synchronize maildir_flags to tags for all
* messages that had new filenames appear on this run. */
gettimeofday (&tv_start, NULL);
if (add_files_state.synchronize_flags) {
_filename_node_t *node;
notmuch_message_t *message;
for (node = add_files_state.message_ids_to_sync->head, i = 0;
node;
node = node->next, i++)
{
message = notmuch_database_find_message (notmuch, node->filename);
notmuch_message_maildir_flags_to_tags (message);
notmuch_message_destroy (message);
if (do_print_progress) {
do_print_progress = 0;
generic_print_progress (
"Synchronized tags for", "messages",
tv_start, i, add_files_state.message_ids_to_sync->count);
}
}
}
talloc_free (add_files_state.message_ids_to_sync);
add_files_state.message_ids_to_sync = NULL;
if (timer_is_active)
stop_progress_printing_timer ();