fflush (stdout);
}
-static int ino_cmp(const struct dirent **a, const struct dirent **b)
+static int
+dirent_sort_inode (const struct dirent **a, const struct dirent **b)
{
return ((*a)->d_ino < (*b)->d_ino) ? -1 : 1;
}
+static int
+dirent_sort_strcmp_name (const struct dirent **a, const struct dirent **b)
+{
+ return strcmp ((*a)->d_name, (*b)->d_name);
+}
+
/* Test if the directory looks like a Maildir directory.
*
* Search through the array of directory entries to see if we can find all
/* Examine 'path' recursively as follows:
*
* o Ask the filesystem for the mtime of 'path' (fs_mtime)
- *
* o Ask the database for its timestamp of 'path' (db_mtime)
*
- * o For each sub-directory of path, recursively call into this
- * same function.
+ * o Ask the filesystem for files and directories within 'path'
+ * (via scandir and stored in fs_entries)
+ * o Ask the database for files and directories within 'path'
+ * (db_files and db_subdirs)
*
- * o If 'fs_mtime' > 'db_mtime'
+ * o Pass 1: For each directory in fs_entries, recursively call into
+ * this same function.
*
- * o For each regular file directly within 'path', call
- * add_message to add the file to the database.
+ * o Pass 2: If 'fs_mtime' > 'db_mtime', then walk fs_entries
+ * simultaneously with db_files and db_subdirs. Look for one of
+ * three interesting cases:
*
- * o Tell the database to update its time of 'path' to 'fs_mtime'
+ * 1. Regular file in fs_entries and not in db_files
+ * This is a new file to add_message into the database.
*
- * The 'struct stat *st' must point to a structure that has already
- * been initialized for 'path' by calling stat().
+ * 2. Filename in db_files not in fs_entries.
+ * This is a file that has been removed from the mail store.
+ *
+ * 3. Directory in db_subdirs not in fs_entries
+ * This is a directory that has been removed from the mail store.
+ *
+ * Note that the addition of a directory is not interesting here,
+ * since that will have been taken care of in pass 1. Also, we
+ * don't immediately act on file/directory removal since we must
+ * ensure that in the case of a rename that the new filename is
+ * added before the old filename is removed, (so that no
+ * information is lost from the database).
+ *
+ * o Tell the database to update its time of 'path' to 'fs_mtime'
*/
static notmuch_status_t
add_files_recursive (notmuch_database_t *notmuch,
struct dirent **fs_entries = NULL;
int i, num_fs_entries;
notmuch_directory_t *directory;
+ notmuch_filenames_t *db_files = NULL;
+ notmuch_filenames_t *db_subdirs = NULL;
struct stat st;
notmuch_bool_t is_maildir;
directory = notmuch_database_get_directory (notmuch, path);
db_mtime = notmuch_directory_get_mtime (directory);
- num_fs_entries = scandir (path, &fs_entries, 0, ino_cmp);
+ /* If the database knows about this directory, then we sort based
+ * on strcmp to match the database sorting. Otherwise, we can do
+ * inode-based sorting for faster filesystem operation. */
+ num_fs_entries = scandir (path, &fs_entries, 0,
+ db_mtime ?
+ dirent_sort_strcmp_name : dirent_sort_inode);
if (num_fs_entries == -1) {
fprintf (stderr, "Error opening directory %s: %s\n",
goto DONE;
}
- /* First, recurse into all sub-directories. */
+ /* Pass 1: Recurse into all sub-directories. */
is_maildir = _entries_resemble_maildir (fs_entries, num_fs_entries);
for (i = 0; i < num_fs_entries; i++) {
}
/* If this directory hasn't been modified since the last
- * add_files, then we can skip the second pass where we look for
- * new files in this directory. */
+ * "notmuch new", then we can skip the second pass entirely. */
if (fs_mtime <= db_mtime)
goto DONE;
- /* Second, scan the regular files in this directory. */
- for (i = 0; i < num_fs_entries; i++) {
+ /* Pass 2: Scan for new files, removed files, and removed directories. */
+ db_files = notmuch_directory_get_child_files (directory);
+ db_subdirs = notmuch_directory_get_child_directories (directory);
+
+ for (i = 0; i < num_fs_entries; i++)
+ {
if (interrupted)
break;
entry = fs_entries[i];
+ /* Check if we've walked past any names in db_files or
+ * db_subdirs. If so, these have been deleted. */
+ while (notmuch_filenames_has_more (db_files) &&
+ strcmp (notmuch_filenames_get (db_files), entry->d_name) < 0)
+ {
+ printf ("Detected deleted file %s/%s\n", path,
+ notmuch_filenames_get (db_files));
+
+ notmuch_filenames_advance (db_files);
+ }
+
+ while (notmuch_filenames_has_more (db_subdirs) &&
+ strcmp (notmuch_filenames_get (db_subdirs), entry->d_name) <= 0)
+ {
+ if (strcmp (notmuch_filenames_get (db_subdirs), entry->d_name) < 0)
+ printf ("Detected deleted directory %s/%s", path,
+ notmuch_filenames_get (db_subdirs));
+
+ notmuch_filenames_advance (db_subdirs);
+ }
+
if (entry->d_type != DT_REG)
continue;
+ /* Don't add a file that we've added before. */
+ if (notmuch_filenames_has_more (db_files) &&
+ strcmp (notmuch_filenames_get (db_files), entry->d_name) == 0)
+ {
+ notmuch_filenames_advance (db_files);
+ continue;
+ }
+
+ /* We're not looking at a regular file that doesn't yet exist
+ * in the database, so add it. */
next = talloc_asprintf (notmuch, "%s/%s", path, entry->d_name);
state->processed_files++;
closedir (dir);
if (fs_entries)
free (fs_entries);
+ if (db_subdirs)
+ notmuch_filenames_destroy (db_subdirs);
+ if (db_files)
+ notmuch_filenames_destroy (db_files);
+ if (directory)
+ notmuch_directory_destroy (directory);
return ret;
}
char *next;
struct stat st;
struct dirent **fs_entries = NULL;
- int num_fs_entries = scandir (path, &fs_entries, 0, ino_cmp);
+ int num_fs_entries = scandir (path, &fs_entries, 0, dirent_sort_inode);
int i = 0;
if (num_fs_entries == -1) {
projects / notmuch.git / commitdiff