Implement cross-platform compatibility in stt.py by replacing system-specific commands with Python's built-in functions

software/source/server/services/stt/local-whisper/stt.py

@@ -12,6 +12,8 @@ import subprocess
 
 import os
 import subprocess
+import platform
+import urllib.request
 
 
 class Stt:
@@ -23,7 +25,6 @@ class Stt:
         return stt(self.service_directory, audio_file_path)
 
 
-
 def install(service_dir):
 
     ### INSTALL
@@ -42,13 +43,13 @@ def install(service_dir):
     # Check if whisper-rust executable exists before attempting to build
     if not os.path.isfile(os.path.join(WHISPER_RUST_PATH, "target/release/whisper-rust")):
         # Check if Rust is installed. Needed to build whisper executable
-        rust_check = subprocess.call('command -v rustc', shell=True)
-        if rust_check != 0:
+        rustc_path = shutil.which('rustc')
+        if rustc_path is None:
             print("Rust is not installed or is not in system PATH. Please install Rust before proceeding.")
             exit(1)
 
         # Build Whisper Rust executable if not found
-        subprocess.call('cargo build --release', shell=True)
+        subprocess.run(['cargo', 'build', '--release'], check=True)
     else:
         print("Whisper Rust executable already exists. Skipping build.")
 
@@ -59,10 +60,12 @@ def install(service_dir):
 
     if not os.path.isfile(os.path.join(WHISPER_MODEL_PATH, WHISPER_MODEL_NAME)):
         os.makedirs(WHISPER_MODEL_PATH, exist_ok=True)
-        subprocess.call(f'curl -L "{WHISPER_MODEL_URL}{WHISPER_MODEL_NAME}" -o "{os.path.join(WHISPER_MODEL_PATH, WHISPER_MODEL_NAME)}"', shell=True)
+        urllib.request.urlretrieve(f"{WHISPER_MODEL_URL}{WHISPER_MODEL_NAME}",
+                                   os.path.join(WHISPER_MODEL_PATH, WHISPER_MODEL_NAME))
     else:
         print("Whisper model already exists. Skipping download.")
 
+
 def convert_mime_type_to_format(mime_type: str) -> str:
     if mime_type == "audio/x-wav" or mime_type == "audio/wav":
         return "wav"
@@ -73,6 +76,7 @@ def convert_mime_type_to_format(mime_type: str) -> str:
 
     return mime_type
 
+
 @contextlib.contextmanager
 def export_audio_to_wav_ffmpeg(audio: bytearray, mime_type: str) -> str:
     temp_dir = tempfile.gettempdir()
@@ -105,10 +109,12 @@ def export_audio_to_wav_ffmpeg(audio: bytearray, mime_type: str) -> str:
         os.remove(input_path)
         os.remove(output_path)
 
+
 def run_command(command):
     result = subprocess.run(command, stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True)
     return result.stdout, result.stderr
 
+
 def get_transcription_file(service_directory, wav_file_path: str):
     local_path = os.path.join(service_directory, 'model')
     whisper_rust_path = os.path.join(service_directory, 'whisper-rust', 'target', 'release')
@@ -124,14 +130,15 @@ def get_transcription_file(service_directory, wav_file_path: str):
 
 
 def stt_wav(service_directory, wav_file_path: str):
-        temp_dir = tempfile.gettempdir()
-        output_path = os.path.join(temp_dir, f"output_stt_{datetime.now().strftime('%Y%m%d%H%M%S%f')}.wav")
-        ffmpeg.input(wav_file_path).output(output_path, acodec='pcm_s16le', ac=1, ar='16k').run()
-        try:
-            transcript = get_transcription_file(service_directory, output_path)
-        finally:
-            os.remove(output_path)
-        return transcript
+    temp_dir = tempfile.gettempdir()
+    output_path = os.path.join(temp_dir, f"output_stt_{datetime.now().strftime('%Y%m%d%H%M%S%f')}.wav")
+    ffmpeg.input(wav_file_path).output(output_path, acodec='pcm_s16le', ac=1, ar='16k').run()
+    try:
+        transcript = get_transcription_file(service_directory, output_path)
+    finally:
+        os.remove(output_path)
+    return transcript
+
 
 def stt(service_directory, input_data):
     return stt_wav(service_directory, input_data)