sw:vec_iree: Use wget instead of download_url.py in CMake

Change-Id: I58e89fbad764dff53231c7345cecdaa388bdc3e9

build_tools/download_url.py

diff --git a/build_tools/download_url.py b/build_tools/download_url.py
deleted file mode 100755
index e8aa650..0000000
--- a/build_tools/download_url.py
+++ /dev/null
@@ -1,15 +0,0 @@
-#!/usr/bin/env python3
-"""Download file from URL."""
-import argparse
-import urllib.request
-
-args = parser = argparse.ArgumentParser(
-    description='Download files from URL.')
-parser.add_argument('--u', dest='img_url', required=True,
-                    help='Input image URL')
-parser.add_argument('--o', dest='output_file',
-                    help='Output binary name', required=True)
-args = parser.parse_args()
-
-if __name__ == '__main__':
-    urllib.request.urlretrieve(args.img_url, args.output_file)

cmake/iree_model_input.cmake

diff --git a/cmake/iree_model_input.cmake b/cmake/iree_model_input.cmake
index bb28d37..f9e09ca 100644
--- a/cmake/iree_model_input.cmake
+++ b/cmake/iree_model_input.cmake
@@ -36,17 +36,15 @@
   string(REGEX MATCH "^https:" _RULE_SRC_URL ${_RULE_SRC_TRIM})
   if (_RULE_SRC_URL)
     get_filename_component(_INPUT_FILENAME "${_RULE_SRC}" NAME)
-    set(_ARGS)
-    set(_DOWNLOAD_SCRIPT "${CMAKE_SOURCE_DIR}/build_tools/download_url.py")
-    list(APPEND _ARGS "--u=${_RULE_SRC_TRIM}")
-    list(APPEND _ARGS "--o=${_INPUT_FILENAME}")
+    find_program(_WGET wget HINT "$ENV{PATH}" REQUIRED)
     add_custom_command(
       OUTPUT
         ${_INPUT_FILENAME}
       COMMAND
-        ${_DOWNLOAD_SCRIPT} ${_ARGS}
-      DEPENDS
-        ${_DOWNLOAD_SCRIPT}
+        ${_WGET} -q -P "${CMAKE_CURRENT_BINARY_DIR}" -O "${_INPUT_FILENAME}"
+        "${_RULE_SRC_TRIM}"
+      COMMENT
+        "Download ${_INPUT_FILENAME} from ${_RULE_SRC_TRIM}"
     )
   else()
     set(_INPUT_FILENAME ${_RULE_SRC_TRIM})