working backend

src/epub_tts/__main__.py

@@ -57,6 +57,7 @@ def main(args=None):
     p.add_argument("-o", "--output", help="Output audio file", required=True)
     p.add_argument("-l", "--language", help="Language to use for TTS")
     p.add_argument("-v", "--voice", help="Voice to use for TTS")
+    p.add_argument("-r", "--replace", action="append", nargs=2, help="Replace text in the intermediate output. Specify pairs of old_text new_text. Can be used multiple times.")
     p.add_argument(
         "-b",
         "--backend",
@@ -65,6 +66,8 @@ def main(args=None):
         choices=backend.keys(),
     )
     args = p.parse_args(args or sys.argv[1:])
+    setattr(args, 'replace_map', 
+            {old: new for old, new in args.replace} if args.replace else None)
     print(
         f"Converting {args.input} to {args.output} "
         f"using {args.backend} backend "
@@ -72,20 +75,12 @@ def main(args=None):
             f"{k}={v}" for k, v in vars(args).items() 
             if k not in ("input", "output", "backend") and v is not None)
     )
+    
+    #print(args.replace_map)
 
-    input_path = Path(args.input).resolve()
-    if not input_path.exists():
-        raise FileNotFoundError(f"Input file {input_path} does not exist.")
-    output_path = Path(args.output).resolve()
-    if not output_path.parent.exists():
-        os.makedirs(output_path.parent, exist_ok=True)
-
-    backend_cls = backend[args.backend]
-    backend_instance = backend_cls(
-        backend_cmd=None,
-    )
-    backend_instance.run(
-        input_path, output_path, 
+   
+    backend[args.backend]().run(
+        args.input, args.output, 
         **vars(args),
         )