[MLGO] Refactored verbosity flag in mlgo-utils to common location (#128541)

add common lib file to setup arguments for parser #107898

This is my first pull request to LLVM, so I would appreciate your
feedback :)

Fixes #107898.

---------

Co-authored-by: Aiden Grossman <agrossman154@yahoo.com>

llvm/utils/mlgo-utils/mlgo/corpus/combine_training_corpus.py

@@ -27,6 +27,7 @@ import argparse
 import logging
 
 from mlgo.corpus import combine_training_corpus_lib
+from mlgo.corpus import flags
 
 
 def parse_args_and_run():
@@ -36,15 +37,7 @@ def parse_args_and_run():
     parser.add_argument(
         "--root_dir", type=str, help="The root dir of module paths to combine."
     )
-    # TODO(#107898): Refactor this into a common location.
-    parser.add_argument(
-        "--verbosity",
-        type=str,
-        help="The verbosity level to use for logging",
-        default="INFO",
-        nargs="?",
-        choices=["DEBUG", "INFO", "WARNING", "ERROR"],
-    )
+    flags.add_verbosity_arguments(parser)
     args = parser.parse_args()
     main(args)
 

llvm/utils/mlgo-utils/mlgo/corpus/extract_ir.py

@@ -28,6 +28,7 @@ import json
 import logging
 
 from mlgo.corpus import extract_ir_lib
+from mlgo.corpus import flags
 
 
 def parse_args_and_run():
@@ -111,15 +112,7 @@ def parse_args_and_run():
         default=".llvmbc",
         nargs="?",
     )
-    # TODO(#107898): Refactor this into a common location.
-    parser.add_argument(
-        "--verbosity",
-        type=str,
-        help="The verbosity level to use for logging",
-        default="INFO",
-        nargs="?",
-        choices=["DEBUG", "INFO", "WARNING", "ERROR"],
-    )
+    flags.add_verbosity_arguments(parser)
     args = parser.parse_args()
     main(args)
 

llvm/utils/mlgo-utils/mlgo/corpus/flags.py

@@ -0,0 +1,22 @@
+# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+# See https://llvm.org/LICENSE.txt for license information.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+"""Library functions for setting up common parser arguments"""
+
+from argparse import ArgumentParser
+
+
+def add_verbosity_arguments(parser: ArgumentParser) -> None:
+    """Adds the arguments for verbosity to the ArgumentParser
+
+    Arguments:
+        parser: The argument parser being modified with verbosity arguments.
+    """
+    parser.add_argument(
+        "--verbosity",
+        type=str,
+        help="The verbosity level to use for logging",
+        default="INFO",
+        nargs="?",
+        choices=["DEBUG", "INFO", "WARNING", "ERROR"],
+    )