Add git_execute to mergeinfo from the deleted search_related_commits script

Bug: chromium:1306416
Change-Id: Idebb83998a0d2e9e4034bc5d138d9f52a1215dc3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3644955
Auto-Submit: Almothana Athamneh <almuthanna@chromium.org>
Commit-Queue: Almothana Athamneh <almuthanna@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80591}

tools/release/mergeinfo.py

@@ -11,12 +11,28 @@ import os
 import sys
 import re
 
-from search_related_commits import git_execute
+from subprocess import Popen, PIPE
 
 GIT_OPTION_HASH_ONLY = '--pretty=format:%H'
 GIT_OPTION_NO_DIFF = '--quiet'
 GIT_OPTION_ONELINE = '--oneline'
 
+
+def git_execute(working_dir, args, verbose=False):
+  command = ["git", "-C", working_dir] + args
+  if verbose:
+    print("Git working dir: " + working_dir)
+    print("Executing git command:" + str(command))
+  p = Popen(args=command, stdin=PIPE, stdout=PIPE, stderr=PIPE)
+  output, err = p.communicate()
+  rc = p.returncode
+  if rc != 0:
+    raise Exception(err)
+  if verbose:
+    print("Git return value: " + output)
+  return output
+
+
 def describe_commit(git_working_dir, hash_to_search, one_line=False):
   if one_line:
     return git_execute(git_working_dir, ['show',
@@ -109,7 +125,7 @@ def print_analysis(git_working_dir, hash_to_search):
 
 if __name__ == '__main__':  # pragma: no cover
   parser = argparse.ArgumentParser('Tool to check where a git commit was'
- ' merged and reverted.')
+                                   ' merged and reverted.')
 
   parser.add_argument('-g', '--git-dir', required=False, default='.',
                         help='The path to your git working directory.')