Let us start here, from square one. No, from Zero!

build_msvc.py

@@ -0,0 +1,85 @@
+from typing import Dict, List
+
+import argparse
+import os
+import subprocess
+
+
+def get_vs_installation_path() -> str:
+    program_files_x86 = os.environ["ProgramFiles(x86)"]
+    process = subprocess.run(
+        [f"{program_files_x86}\\Microsoft Visual Studio\\Installer\\vswhere.exe", "-prerelease", "-latest", "-property",
+         "installationPath"],
+        capture_output=True, check=True, encoding="utf-8")
+
+    return process.stdout.strip()
+
+
+def source_bat(bat_file: str, arch: str) -> Dict[str, str]:
+    interesting = {"INCLUDE", "LIB", "LIBPATH", "PATH"}
+    result = {}
+
+    process = subprocess.Popen(f"\"{bat_file}\" {arch} & set", stdout=subprocess.PIPE, shell=True, encoding="utf-8")
+    (out, err) = process.communicate()
+
+    if err is not None:
+        raise Exception(err)
+
+    for line in out.split("\n"):
+        if '=' not in line:
+            continue
+
+        key, value = line.strip().split('=', 1)
+        key = key.upper()
+
+        if key in interesting:
+            result[key] = value
+
+    return result
+
+
+def run_build(build_dir: str, build_type: str, build_targets: List[str], build_env: Dict[str, str]):
+    os.makedirs(build_dir, exist_ok=True)
+
+    subprocess.check_call(["cmake.exe", f"-DCMAKE_BUILD_TYPE={build_type}", "-GNinja", ".."], cwd=build_dir,
+                          env=build_env, shell=True)
+    subprocess.check_call(["ninja.exe"] + build_targets, cwd=build_dir, env=build_env, shell=True)
+
+
+def main():
+    parser = argparse.ArgumentParser(description='Build SpiceTools with MSVC')
+    parser.add_argument('--build-type', type=str, default='Release', help='CMake build type')
+
+    args = parser.parse_args()
+
+    build_dir = args.build_type.lower()
+    parent_env = {key: os.environ[key] for key in os.environ}
+
+    vs_installation_path = get_vs_installation_path()
+    bat_file = f"{vs_installation_path}\\VC\\Auxiliary\\Build\\vcvarsall.bat"
+    print(bat_file)
+
+    # parent_env["CC"] = "clang"
+    # parent_env["CXX"] = "clang++"
+
+    print("Building spice64")
+
+    env_64 = source_bat(bat_file, "x64")
+    env_64_merged = parent_env.copy()
+    env_64_merged.update(env_64)
+
+    run_build(f"cmake-build-{build_dir}-64", args.build_type,
+              ["spicetools_stubs_kbt64", "spicetools_stubs_kld64", "spicetools_spice64"], env_64_merged)
+
+    print("Building spice")
+
+    env_32 = source_bat(bat_file, "x86")
+    env_32_merged = parent_env.copy()
+    env_32_merged.update(env_32)
+
+    run_build(f"cmake-build-{build_dir}-32", args.build_type,
+              ["spicetools_stubs_kbt", "spicetools_stubs_kld", "spicetools_cfg", "spicetools_spice"], env_32_merged)
+
+
+if __name__ == "__main__":
+    main()