Fix: Raise an Error for Wrong Input or Output File Formats in Artbox #157 #240

[manikyarathore]

Users could specify incorrect file formats for input/output paths without receiving validation errors. For example, using --output-path /tmp/artbox/speech.md (text format) instead of speech.mp3 (audio format) for text to speech conversion would complete without error, causing downstream operations to fail.

Solution
= Implemented file format validation for Artbox CLI operations:

New Files:
= validators.py - Validator module with validate_io_paths() function

Changes:
= Validates input/output file extensions based on operation type:
text-to-speech (tts): requires audio output (.mp3, .wav, .ogg, .flac, .m4a, .aac)
speech-to-text (stt): requires audio input and text output (.txt, .md, .srt, .vtt, .json)
Infers operation type from file extensions if not explicitly provided
Raises clear, user-friendly error messages with supported format lists
Exits with code 2 on validation failure
Modified Files:

Benefits

Catches format errors early, saving user time
Clear error messages guide users to correct formats
Prevents cascading failures in multi-step operations
Works with both explicit and inferred operation types

[xmnlab]

Hi @manikyarathore ! if you want to open an gh issue or raise a PR for artbox, this is its repo: https://github.com/osl-incubator/artbox