Align our subprocess usage with current best practices. (#12940)

* Align our subprocess usage with current best practices.

* remove unused import

* Apply suggestions from code review

Co-authored-by: Ryan <fauxpark@gmail.com>

* fix the cpp invocation for older python

* allow for unprompted installation

* make sure qmk new-keyboard works on windows

Co-authored-by: Ryan <fauxpark@gmail.com>

1 files changed, 2 insertions, 3 deletions

diff --git a/lib/python/qmk/os_helpers/__init__.py b/lib/python/qmk/os_helpers/__init__.py
index 3f64a63a3..3e98db3c3 100644
--- a/lib/python/qmk/os_helpers/__init__.py
+++ b/lib/python/qmk/os_helpers/__init__.py
@@ -3,10 +3,9 @@
 from enum import Enum
 import re
 import shutil
-import subprocess
+from subprocess import DEVNULL
 
 from milc import cli
-from qmk.commands import run
 from qmk import submodules
 from qmk.constants import QMK_FIRMWARE
 
@@ -142,7 +141,7 @@ def is_executable(command):
 
     # Make sure the command can be executed
     version_arg = ESSENTIAL_BINARIES[command].get('version_arg', '--version')
-    check = run([command, version_arg], stdout=subprocess.PIPE, stderr=subprocess.STDOUT, timeout=5, universal_newlines=True)
+    check = cli.run([command, version_arg], combined_output=True, stdin=DEVNULL, timeout=5)
 
     ESSENTIAL_BINARIES[command]['output'] = check.stdout