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"""Add things to old Pythons so I can pretend they are newer, for tests."""
# pylint: disable-msg=W0622
# (Redefining built-in blah)
# The whole point of this file is to redefine built-ins, so shut up about it.
import os, sys
# Py2k and 3k don't agree on how to run commands in a subprocess.
try:
import subprocess
except ImportError:
def run_command(cmd):
"""Run a command in a subprocess.
Returns the exit code and the combined stdout and stderr.
"""
_, stdouterr = os.popen4(cmd)
return 0, stdouterr.read()
else:
def run_command(cmd):
"""Run a command in a subprocess.
Returns the exit code and the combined stdout and stderr.
"""
if sys.hexversion > 0x03000000 and cmd.startswith("coverage "):
# We don't have a coverage command on 3.x, so fix it up to call the
# script. Eventually we won't need this.
cmd = "python " + sys.prefix + os.sep + "Scripts" + os.sep + cmd
proc = subprocess.Popen(cmd, shell=True,
stdin=subprocess.PIPE, stdout=subprocess.PIPE,
stderr=subprocess.STDOUT
)
retcode = proc.wait()
# Get the output, and canonicalize it to strings with newlines.
output = proc.stdout.read()
if not isinstance(output, str):
output = output.decode('utf-8')
output = output.replace('\r', '')
return retcode, output
# No more execfile in Py3k
try:
execfile = execfile
except NameError:
def execfile(filename, globs):
"""A Python 3 implementation of execfile."""
exec(compile(open(filename).read(), filename, 'exec'), globs)
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