[tracker-miners/wip/carlosg/speed-track: 32/40] libtracker-miner: Avoid info queries on TrackerCrawler directories

[Carlos Garnacho <carlosg src gnome org>]

commit fa8273d7bb56934173d4af29688c0afb963ad015
Author: Carlos Garnacho <carlosg gnome org>
Date:   Sat Oct 17 14:37:58 2020 +0200

    libtracker-miner: Avoid info queries on TrackerCrawler directories
    
    When asking to crawl a directory, we always perform a info query on
    the directory itself. However, most often this is a directory that
    is being recursively inspected, thus comes from the TrackerCrawler
    itself.
    
    This brings 2 benefits:
    - Most often we avoid a redundant file info query
    - We now only call check_directory() once per directory, fixing
      the accounting of directories in our debug output.

 src/libtracker-miner/tracker-crawler.c | 25 ++++++++-----------------
 1 file changed, 8 insertions(+), 17 deletions(-)
---
diff --git a/src/libtracker-miner/tracker-crawler.c b/src/libtracker-miner/tracker-crawler.c
index 7588dc952..4e6b42a92 100644
--- a/src/libtracker-miner/tracker-crawler.c
+++ b/src/libtracker-miner/tracker-crawler.c
@@ -373,6 +373,7 @@ directory_processing_data_add_child (DirectoryProcessingData *data,
 
 static DirectoryRootInfo *
 directory_root_info_new (GFile                 *file,
+                         GFileInfo             *file_info,
                          gchar                 *file_attributes,
                          TrackerDirectoryFlags  flags)
 {
@@ -393,19 +394,7 @@ directory_root_info_new (GFile                 *file,
                allow_stat = FALSE;
        }
 
-       /* NOTE: GFileInfo is ABSOLUTELY required here, without it the
-        * TrackerFileNotifier will think that top level roots have
-        * been deleted because the GFileInfo GQuark does not exist.
-        *
-        * This is seen easily by mounting a removable device,
-        * indexing, then removing, then re-inserting that same
-        * device.
-        *
-        * The check is done later in the TrackerFileNotifier by
-        * looking up the qdata that we set in both conditions below.
-        */
-       if (allow_stat && file_attributes) {
-               GFileInfo *file_info;
+       if (!file_info && allow_stat && file_attributes) {
                GFileQueryInfoFlags file_flags;
 
                file_flags = G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS;
@@ -419,8 +408,7 @@ directory_root_info_new (GFile                 *file,
                                         file_info_quark,
                                         file_info,
                                         (GDestroyNotify) g_object_unref);
-       } else {
-               GFileInfo *file_info;
+       } else if (!file_info) {
                gchar *basename;
 
                file_info = g_file_info_new ();
@@ -905,6 +893,7 @@ tracker_crawler_get (TrackerCrawler        *crawler,
        TrackerCrawlerPrivate *priv;
        DirectoryProcessingData *dir_data;
        DirectoryRootInfo *info;
+       GFileInfo *file_info;
        GTask *task;
 
        g_return_if_fail (TRACKER_IS_CRAWLER (crawler));
@@ -912,14 +901,16 @@ tracker_crawler_get (TrackerCrawler        *crawler,
 
        priv = tracker_crawler_get_instance_private (crawler);
 
-       info = directory_root_info_new (file, priv->file_attributes, flags);
+       file_info = tracker_crawler_get_file_info (crawler, file);
+
+       info = directory_root_info_new (file, file_info, priv->file_attributes, flags);
        task = g_task_new (crawler, cancellable, callback, user_data);
        g_task_set_task_data (task, info,
                              (GDestroyNotify) directory_root_info_free);
        info->task = task;
        info->crawler = crawler;
 
-       if (!check_directory (crawler, info, file)) {
+       if (!file_info && !check_directory (crawler, info, file)) {
                g_task_return_boolean (task, FALSE);
                g_object_unref (task);
                return;