Setup MSVC environment in CI workflow (#2942)

Part of #2030
Part of #2824

For all other compilers the situation is about the same, it is expected
that they are already in the paths. I don't think it should be any
different for Windows.

---------

Signed-off-by: Anatoly Myachev <[email protected]>

Author: anmyachev

.github/workflows/build-test-windows.yml

@@ -45,6 +45,13 @@ jobs:
       - name: Build Triton
         run: |
           cd ${{ env.NEW_WORKSPACE }}
+
+          cmd /c '"C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Auxiliary\Build\vcvarsall.bat" x64 && set' | ForEach-Object {
+              if ($_ -match '^(.*?)=(.*)$') {
+                  [Environment]::SetEnvironmentVariable($matches[1], $matches[2])
+              }
+          }
+
           cd python
           pip install -U wheel pybind11 certifi cython cmake setuptools>=65.6.1
           python -m certifi

python/setup.py

@@ -103,56 +103,6 @@ def copy_externals():
         ]
 
 
-def find_vswhere():
-    program_files = os.environ.get("ProgramFiles(x86)", "C:\\Program Files (x86)")
-    vswhere_path = Path(program_files) / "Microsoft Visual Studio" / "Installer" / "vswhere.exe"
-    if vswhere_path.exists():
-        return vswhere_path
-    return None
-
-
-def find_visual_studio(version_ranges):
-    vswhere = find_vswhere()
-    if not vswhere:
-        raise FileNotFoundError("vswhere.exe not found.")
-
-    for version_range in version_ranges:
-        command = [
-            str(vswhere), "-version", version_range, "-requires", "Microsoft.VisualStudio.Component.VC.Tools.x86.x64",
-            "-products", "*", "-property", "installationPath", "-prerelease"
-        ]
-
-        try:
-            output = subprocess.check_output(command, text=True).strip()
-            if output:
-                return output.split("\n")[0]
-        except subprocess.CalledProcessError:
-            continue
-
-    return None
-
-
-def set_env_vars(vs_path, arch="x64"):
-    vcvarsall_path = Path(vs_path) / "VC" / "Auxiliary" / "Build" / "vcvarsall.bat"
-    if not vcvarsall_path.exists():
-        raise FileNotFoundError(f"vcvarsall.bat not found in expected path: {vcvarsall_path}")
-
-    command = ["call", vcvarsall_path, arch, "&&", "set"]
-    output = subprocess.check_output(command, shell=True, text=True)
-
-    for line in output.splitlines():
-        if '=' in line:
-            var, value = line.split('=', 1)
-            os.environ[var] = value
-
-
-def initialize_visual_studio_env(version_ranges, arch="x64"):
-    vs_path = find_visual_studio(version_ranges)
-    if not vs_path:
-        raise EnvironmentError("Visual Studio not found in specified version ranges.")
-    set_env_vars(vs_path, arch)
-
-
 # Taken from https://github.com/pytorch/pytorch/blob/master/tools/setup_helpers/env.py
 def check_env_flag(name: str, default: str = "") -> bool:
     return os.getenv(name, default).upper() in ["ON", "1", "YES", "TRUE", "Y"]
@@ -475,8 +425,6 @@ def get_proton_cmake_args(self):
     def build_extension(self, ext):
         lit_dir = shutil.which('lit')
         ninja_dir = shutil.which('ninja')
-        if platform.system() == "Windows":
-            initialize_visual_studio_env(["[17.0,18.0)", "[16.0,17.0)"])
         # lit is used by the test suite
         thirdparty_cmake_args = get_thirdparty_packages([get_llvm_package_info()])
         thirdparty_cmake_args += self.get_pybind11_cmake_args()

python/triton/runtime/CLFinder.py

@@ -7,7 +7,6 @@
 import subprocess
 import setuptools
 import platform
-from .CLFinder import initialize_visual_studio_env
 
 
 def is_xpu():
@@ -60,7 +59,6 @@ def _build(name, src, srcdir, library_dirs, include_dirs, libraries, extra_compi
         cc = gcc if gcc is not None else clang
         if platform.system() == "Windows":
             cc = "cl"
-            initialize_visual_studio_env(["[17.0,18.0)", "[16.0,17.0)"])
         if cc is None:
             raise RuntimeError("Failed to find C compiler. Please specify via CC environment variable.")
     # This function was renamed and made public in Python 3.10