Update mode

By doing update, cgg will check the output structure for missing files and re-generate them as necessary. The decision
whether an item (file, picture, album) needs to be updated is done by comparing timestamps (mtime specifically). Due to that reason it's important to
keep this fact in mind when replacing single image which carries older timestamp than other files. Either don't use the update mode or 'touch' that
new file. Changes made to any XML file will result in whole album re-generation (excluding subalbums).

1 files changed, 5 insertions, 0 deletions

diff --git a/src/gallery-utils.h b/src/gallery-utils.h
index d9c1d8a..85ad35d 100644
--- a/src/gallery-utils.h
+++ b/src/gallery-utils.h
@@ -73,6 +73,11 @@ const char *extract_file_ext (const char *filename);
  */
 void log_error (const gchar *format, ...) G_GNUC_PRINTF (1, 2);
 
+/*
+ *   needs_update: returns TRUE if the destionation file needs updating, also when missing
+ */
+gboolean needs_update (const char *source, const char *dest);
+
 
 #ifdef __cplusplus
   }