Remove use_pytorch_nightly throughout the code

Author: larryliu0820

install_executorch.py

@@ -203,13 +203,9 @@ def main(args):
     os.environ["CMAKE_ARGS"] = " ".join(cmake_args)
 
     check_and_update_submodules()
-    # This option is used in CI to make sure that PyTorch build from the pinned commit
-    # is used instead of nightly. CI jobs wouldn't be able to catch regression from the
-    # latest PT commit otherwise
-    use_pytorch_nightly = not args.use_pt_pinned_commit
 
     # Step 1: Install core dependencies first
-    install_requirements(use_pytorch_nightly)
+    install_requirements()
 
     # Step 2: Install core package
     cmd = (
@@ -230,7 +226,7 @@ def main(args):
 
     # Step 3: Extra (optional) packages that is only useful for running examples.
     if not args.minimal:
-        install_optional_example_requirements(use_pytorch_nightly)
+        install_optional_example_requirements()
 
 
 if __name__ == "__main__":

install_requirements.py

@@ -62,22 +62,11 @@ def python_is_compatible():
 TORCH_URL = "https://download.pytorch.org/whl/test/cpu"
 
 
-def install_requirements(use_pytorch_nightly):
-    # Skip pip install on Intel macOS if using nightly.
-    if use_pytorch_nightly and is_intel_mac_os():
-        print(
-            "ERROR: Prebuilt PyTorch wheels are no longer available for Intel-based macOS.\n"
-            "Please build from source by following https://docs.pytorch.org/executorch/main/using-executorch-building-from-source.html",
-            file=sys.stderr,
-        )
-        sys.exit(1)
+def install_requirements():
 
     # pip packages needed by exir.
     TORCH_PACKAGE = [
-        # Setting use_pytorch_nightly to false to test the pinned PyTorch commit. Note
-        # that we don't need to set any version number there because they have already
-        # been installed on CI before this step, so pip won't reinstall them
-        "torch==2.8.0" if use_pytorch_nightly else "torch",
+        "torch==2.8.0",
     ]
 
     # Install the requirements for core ExecuTorch package.
@@ -129,7 +118,7 @@ def install_requirements(use_pytorch_nightly):
     )
 
 
-def install_optional_example_requirements(use_pytorch_nightly):
+def install_optional_example_requirements():
     print("Installing packages in requirements-examples.txt")
     subprocess.run(
         [
@@ -145,8 +134,8 @@ def install_optional_example_requirements(use_pytorch_nightly):
 
     print("Installing torch domain libraries")
     DOMAIN_LIBRARIES = [
-        ("torchvision==0.23.0" if use_pytorch_nightly else "torchvision"),
-        "torchaudio==2.8.0" if use_pytorch_nightly else "torchaudio",
+        "torchvision==0.23.0",
+        "torchaudio==2.8.0",
     ]
     # Then install domain libraries
     subprocess.run(
@@ -175,21 +164,15 @@ def is_intel_mac_os():
 
 def main(args):
     parser = argparse.ArgumentParser()
-    parser.add_argument(
-        "--use-pt-pinned-commit",
-        action="store_true",
-        help="build from the pinned PyTorch commit instead of nightly",
-    )
     parser.add_argument(
         "--example",
         action="store_true",
         help="Also installs required packages for running example scripts.",
     )
     args = parser.parse_args(args)
-    use_pytorch_nightly = not bool(args.use_pt_pinned_commit)
-    install_requirements(use_pytorch_nightly)
+    install_requirements()
     if args.example:
-        install_optional_example_requirements(use_pytorch_nightly)
+        install_optional_example_requirements()
 
 
 if __name__ == "__main__":