Make subprocess find git executable on Windows
The problem you see here is that the Windows API function CreateProcess, used by subprocess under the hood, doesn't auto-resolve other executable extensions than .exe
. On Windows, the 'git' command is really installed as git.cmd
. Therefore, you should modify your example to explicitly invoke git.cmd
:
import subprocess
proc = subprocess.Popen('git.cmd status')
print 'result: ', proc.communicate()
The reason git
works when shell==True
is that the Windows shell auto-resolves git
to git.cmd
.
Eventually, resolve git.cmd yourself:
import subprocess
import os.path
def resolve_path(executable):
if os.path.sep in executable:
raise ValueError("Invalid filename: %s" % executable)
path = os.environ.get("PATH", "").split(os.pathsep)
# PATHEXT tells us which extensions an executable may have
path_exts = os.environ.get("PATHEXT", ".exe;.bat;.cmd").split(";")
has_ext = os.path.splitext(executable)[1] in path_exts
if not has_ext:
exts = path_exts
else:
# Don't try to append any extensions
exts = [""]
for d in path:
try:
for ext in exts:
exepath = os.path.join(d, executable + ext)
if os.access(exepath, os.X_OK):
return exepath
except OSError:
pass
return None
git = resolve_path("git")
proc = subprocess.Popen('{0} status'.format(git))
print 'result: ', proc.communicate()