Enable user to exit podcast generation gracefully (#74)

* Add try/except if user wants to stop podcast gen early

* Add feature note in docs

docs/cli.md

@@ -18,6 +18,8 @@ document-to-podcast \
 --text_to_text_model "Qwen/Qwen2.5-1.5B-Instruct-GGUF/qwen2.5-1.5b-instruct-q8_0.gguf"
 ```
 
+Note that you can also exit the podcast generation prematurely (before the whole podcast is created), by pressing Ctrl+C in the terminal. This will make the application stop the generation, but still save the result (script & audio) to disk up until that point.
+
 ---
 
 ::: document_to_podcast.cli.document_to_podcast

src/document_to_podcast/cli.py

@@ -133,27 +133,30 @@ def document_to_podcast(
     system_prompt = system_prompt.replace(
         "{SPEAKERS}", "\n".join(str(speaker) for speaker in config.speakers)
     )
-    for chunk in text_to_text_stream(
-        clean_text, text_model, system_prompt=system_prompt
-    ):
-        text += chunk
-        podcast_script += chunk
-        if text.endswith("\n") and "Speaker" in text:
-            logger.debug(text)
-            speaker_id = re.search(r"Speaker (\d+)", text).group(1)
-            voice_profile = next(
-                speaker.voice_profile
-                for speaker in config.speakers
-                if speaker.id == int(speaker_id)
-            )
-            speech = text_to_speech(
-                text.split(f'"Speaker {speaker_id}":')[-1],
-                speech_model,
-                voice_profile,
-                tokenizer=speech_tokenizer,  # Applicable only for parler models
-            )
-            podcast_audio.append(speech)
-            text = ""
+    try:
+        for chunk in text_to_text_stream(
+            clean_text, text_model, system_prompt=system_prompt
+        ):
+            text += chunk
+            podcast_script += chunk
+            if text.endswith("\n") and "Speaker" in text:
+                logger.debug(text)
+                speaker_id = re.search(r"Speaker (\d+)", text).group(1)
+                voice_profile = next(
+                    speaker.voice_profile
+                    for speaker in config.speakers
+                    if speaker.id == int(speaker_id)
+                )
+                speech = text_to_speech(
+                    text.split(f'"Speaker {speaker_id}":')[-1],
+                    speech_model,
+                    voice_profile,
+                    tokenizer=speech_tokenizer,  # Applicable only for parler models
+                )
+                podcast_audio.append(speech)
+                text = ""
+    except KeyboardInterrupt:
+        logger.warning("Podcast generation stopped by user.")
 
     logger.info("Saving Podcast...")
     sf.write(