git pre commit hook: use shlex.split()

Signed-off-by: Giampaolo Rodola <g.rodola@gmail.com>

scripts/internal/git_pre_commit.py

@@ -22,6 +22,7 @@
 from __future__ import print_function
 
 import os
+import shlex
 import subprocess
 import sys
 
@@ -118,24 +119,21 @@ def main():
 
     # Python linters
     if py_files:
-        # Flake8
+        # flake8
         assert os.path.exists('.flake8')
-        # XXX: we should escape spaces and possibly other amenities here
         cmd = "%s -m flake8 --config=.flake8 %s" % (PYTHON, " ".join(py_files))
-        ret = subprocess.call(cmd, shell=True)
+        ret = subprocess.call(shlex.split(cmd))
         if ret != 0:
             return exit("python code is not flake8 compliant; "
                         "try running 'make fix-flake8'")
-
         # isort
         assert os.path.exists('.isort.cfg')
         cmd = "%s -m isort --settings=.isort.cfg --check-only %s" % (
             PYTHON, " ".join(py_files))
-        ret = subprocess.call(cmd, shell=True)
+        ret = subprocess.call(shlex.split(cmd))
         if ret != 0:
             return exit("python code is not flake8 compliant; "
                         "try running 'make fix-imports'")
-
     # C linter
     if c_files:
         # XXX: we should escape spaces and possibly other amenities here