fix: fairseq model

[AntonyZ89]

Fix error when using fairseq model. The dataset and model aren't being defined and throw an error:

Sample:

from TTS.api import TTS

# TTS with on the fly voice conversion
api = TTS("tts_models/eng/fairseq/vits").to("cpu")
api.tts_with_vc_to_file(
    "Things that are fixed with great speed, but as a result, it's probably not going to work very well.",
    speaker_wav="target/speaker.wav",
    file_path="output.wav"
)

error:

Traceback (most recent call last):
  File "/var/www/python/coquitts-poc/./fairseq.py", line 13, in <module>
    tts = TTS(model_name="tts_models/eng/fairseq/vits").to("cpu")
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/var/www/python/coquitts-poc/TTS/TTS/api.py", line 74, in __init__
    self.load_tts_model_by_name(model_name, gpu)
  File "/var/www/python/coquitts-poc/TTS/TTS/api.py", line 171, in load_tts_model_by_name
    model_path, config_path, vocoder_path, vocoder_config_path, model_dir = self.download_model_by_name(
                                                                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/var/www/python/coquitts-poc/TTS/TTS/api.py", line 129, in download_model_by_name
    model_path, config_path, model_item = self.manager.download_model(model_name)
                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/var/www/python/coquitts-poc/TTS/TTS/utils/manage.py", line 388, in download_model
    model_item, model_full_name, model, md5sum = self._set_model_item(model_name)
                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/var/www/python/coquitts-poc/TTS/TTS/utils/manage.py", line 307, in _set_model_item
    model_full_name = f"{model_type}--{lang}--{dataset}--{model}"
                                               ^^^^^^^
UnboundLocalError: cannot access local variable 'dataset' where it is not associated with a value

fixes: #3142 #3361

[CLAassistant]

All committers have signed the CLA.

[Binozo]

Should be merged asap

[magomar]

Please @AntonyZ89 sign the Contributor License Agreement so that this pull request can be merged.

[AntonyZ89]

Please @AntonyZ89 sign the Contributor License Agreement so that this pull request can be merged.

done!

[davidmartinrius]

I have created a fork of TTS, incorporating all the valid pending pull requests. You can find it at https://github.com/davidmartinrius/TTS/

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions. You might also look our discussion channels.

[AntonyZ89]

bump

[eginhard]

@AntonyZ89 This repository is not maintained anymore. You could use the coqui-tts package instead, which includes a similar fix.