Make database update check cron-friendly.

Fixes #85

app/songdb.py

@@ -14,11 +14,13 @@ from mutagen.mp3 import MP3
 from pydub import AudioSegment, effects
 from tinytag import TinyTag
 
+# Globals (I know)
+messages = []
 
 def main():
     "Main loop"
 
-    INFO("Starting")
+    DEBUG("Starting")
 
     # Parse command line
     p = argparse.ArgumentParser()
@@ -36,25 +38,25 @@ def main():
 
     # Run as required
     if args.update:
-        INFO("Updating database")
+        DEBUG("Updating database")
         with Session() as session:
             update_db(session)
     elif args.full_update:
-        INFO("Full update of database")
+        DEBUG("Full update of database")
         with Session() as session:
             full_update_db(session)
     elif args.fname:
         fname = os.path.realpath(args.fname)
         with Session() as session:
-            create_track_from_file(session, fname, verbose=True)
+            create_track_from_file(session, fname, interactive=True)
 
     else:
         INFO("No action specified")
 
-    INFO("Finished")
+    DEBUG("Finished")
 
 
-def create_track_from_file(session, path, verbose=False):
+def create_track_from_file(session, path, interactive=False):
     """
     Create track in database from passed path, or update database entry
     if path already in database.
@@ -62,7 +64,7 @@ def create_track_from_file(session, path, verbose=False):
     Return track.
     """
 
-    if verbose:
+    if interactive:
         str = f"Importing {path}"
         INFO(str)
         INFO("-" * len(str))
@@ -70,7 +72,7 @@ def create_track_from_file(session, path, verbose=False):
     t = get_music_info(path)
     title = t['title']
     artist = t['artist']
-    if verbose:
+    if interactive:
         INFO(f"    Title: \"{title}\"")
         INFO(f"    Artist: \"{artist}\"")
     # Check for duplicate
@@ -90,7 +92,7 @@ def create_track_from_file(session, path, verbose=False):
     track.duration = int(round(
         t['duration'], Config.MILLISECOND_SIGFIGS) * 1000)
 
-    if verbose:
+    if interactive:
         INFO("Parse for start, fade and silence...")
     audio = get_audio_segment(path)
     track.start_gap = leading_silence(audio)
@@ -102,7 +104,7 @@ def create_track_from_file(session, path, verbose=False):
     session.commit()
 
     if Config.NORMALISE_ON_IMPORT:
-        if verbose:
+        if interactive:
             INFO("Normalise...")
         # Check type
         ftype = os.path.splitext(path)[1][1:]
@@ -329,8 +331,7 @@ def update_db(session):
         # is filename in database?
         track = Tracks.get_track_from_filename(session, os.path.basename(path))
         if not track:
-            INFO(f"songdb.update_db: Adding to database: {path}")
-            create_track_from_file(session, path)
+            messages.append(f"Track missing from database: {path}")
         else:
             # Check track info matches found track
             t = get_music_info(path)
@@ -345,7 +346,7 @@ def update_db(session):
     for path in list(db_paths - os_paths):
         # Manage tracks listed in database but where path is invalid
         track = Tracks.get_track_from_path(session, path)
-        INFO(f"songdb.update_db(): remove from database: {path=} {track=}")
+        messages.append(f"Remove from database: {path=} {track=}")
 
         # Remove references from Playdates
         Playdates.remove_track(session, track.id)
@@ -364,6 +365,12 @@ def update_db(session):
         # Remove Track entry pointing to invalid path
         Tracks.remove_path(session, path)
 
+    # Output messages (so if running via cron, these will get sent to
+    # user)
+    if messages:
+        print("Messages")
+        print("\n".join(messages))
+
 
 def update_meta(session, track, artist=None, title=None):
     """