Fix shader generator script Windows compatibility

Co-authored-by: Concedo <39025047+LostRuins@users.noreply.github.com>

ggml_vk_generate_shaders.py

@@ -1,5 +1,6 @@
 #!/usr/bin/env python
 
+import argparse
 import asyncio
 import os
 import sys
@@ -769,6 +770,7 @@
 }
 """
 
+GLSLC = "glslc"
 
 VK_NUM_TYPES = 16
 
@@ -809,41 +811,44 @@
 
 
 async def string_to_spv_file(name, code, defines, fp16):
-    with NamedTemporaryFile(mode="w") as f:
-        f.write(code)
-        f.flush()
+    f = NamedTemporaryFile(mode="w", delete=False)
+    f.write(code)
+    f.flush()
 
-        cmd = ["glslc", "-fshader-stage=compute", "--target-env=vulkan1.2", "-O", f.name, "-o", os.path.join("vk_shaders", f"{name}{'_fp32' if not fp16 else ''}.comp")]
+    cmd = [GLSLC, "-fshader-stage=compute", "--target-env=vulkan1.2", "-O", f.name, "-o", os.path.join("vk_shaders", f"{name}{'_fp32' if not fp16 else ''}.comp")]
 
+    cmd.extend([f"-D{key}={value}" for key, value in defines.items()])
+
+    proc = await asyncio.create_subprocess_exec(*cmd, stdout=asyncio.subprocess.PIPE, stderr=asyncio.subprocess.PIPE)
+
+    stdout, stderr = await proc.communicate()
+
+    stdout = stdout.decode()
+    error = stderr.decode()
+
+    if proc.returncode:
+        # Generate preprocessed code
+        cmd = [GLSLC, "-E", f.name]
         cmd.extend([f"-D{key}={value}" for key, value in defines.items()])
 
         proc = await asyncio.create_subprocess_exec(*cmd, stdout=asyncio.subprocess.PIPE, stderr=asyncio.subprocess.PIPE)
 
         stdout, stderr = await proc.communicate()
 
-        stdout = stdout.decode()
-        error = stderr.decode()
+        print(" ".join(cmd))
 
         if proc.returncode:
-            # Generate preprocessed code
-            cmd = ["glslc", "-E", f.name]
-            cmd.extend([f"-D{key}={value}" for key, value in defines.items()])
-
-            proc = await asyncio.create_subprocess_exec(*cmd, stdout=asyncio.subprocess.PIPE, stderr=asyncio.subprocess.PIPE)
-
-            stdout, stderr = await proc.communicate()
+            raise RuntimeError(f"{name=} {f.name=} {stdout=} {stderr=}")
 
-            print(" ".join(cmd))
+        preprocessed_code = stdout.decode()
 
-            if proc.returncode:
-                raise RuntimeError(f"{name=} {f.name=} {stdout=} {stderr=}")
-
-            preprocessed_code = stdout.decode()
+        cmd.extend([f"-D{key}={value}" for key, value in defines.items()])
+        code_with_lines = "\n".join([f"{i}: {line}" for i, line in enumerate(preprocessed_code.splitlines())])
+        print(f"ERROR compiling {name}\n\n{code_with_lines}\n\n{error=}")
+        os.remove(f.name)
+        sys.exit(proc.returncode)
 
-            cmd.extend([f"-D{key}={value}" for key, value in defines.items()])
-            code_with_lines = "\n".join([f"{i}: {line}" for i, line in enumerate(preprocessed_code.splitlines())])
-            print(f"ERROR compiling {name}\n\n{code_with_lines}\n\n{error=}")
-            sys.exit(proc.returncode)
+    os.remove(f.name)
 
 
 async def main():
@@ -963,4 +968,14 @@ async def main():
         await asyncio.gather(*tasks)
 
 
-asyncio.run(main())
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(description="GGML Vulkan Shader Generator")
+
+    parser.add_argument("--glslc", help="Path to glslc")
+
+    args = parser.parse_args()
+
+    if args.glslc:
+        GLSLC = args.glslc
+
+    asyncio.run(main())