Automatic torch install for amd on linux

This commit allows the launch script to automatically download rocm's torch version for AMD GPUs using an external GPU detection script. It also prints the operative system and GPU in use.

launch.py

@@ -7,6 +7,7 @@ import shlex
 import platform
 import argparse
 import json
+import detection
 
 dir_repos = "repositories"
 dir_extensions = "extensions"
@@ -15,6 +16,12 @@ git = os.environ.get('GIT', "git")
 index_url = os.environ.get('INDEX_URL', "")
 stored_commit_hash = None
 
+# Get the GPU vendor and the operating system
+gpu = detection.check_gpu()
+if os.name == "posix":
+    os_name = platform.uname().system
+else:
+    os_name = os.name
 
 def commit_hash():
     global stored_commit_hash
@@ -173,7 +180,11 @@ def run_extensions_installers(settings_file):
 
 
 def prepare_environment():
-    torch_command = os.environ.get('TORCH_COMMAND', "pip install torch==1.12.1+cu113 torchvision==0.13.1+cu113 --extra-index-url https://download.pytorch.org/whl/cu113")
+    if gpu == "AMD" and os_name !="nt":
+        torch_command = os.environ.get('TORCH_COMMAND', "pip install torch torchvision --extra-index-url https://download.pytorch.org/whl/rocm5.2")
+    else:
+        torch_command = os.environ.get('TORCH_COMMAND', "pip install torch==1.12.1+cu113 torchvision==0.13.1+cu113 --extra-index-url https://download.pytorch.org/whl/cu113")
+    
     requirements_file = os.environ.get('REQS_FILE', "requirements_versions.txt")
     commandline_args = os.environ.get('COMMANDLINE_ARGS', "")
 
@@ -295,6 +306,8 @@ def tests(test_dir):
 
 
 def start():
+    print(f"Operating System: {os_name}")
+    print(f"GPU: {gpu}")
     print(f"Launching {'API server' if '--nowebui' in sys.argv else 'Web UI'} with arguments: {' '.join(sys.argv[1:])}")
     import webui
     if '--nowebui' in sys.argv: