gstreamer/common.py
Nirbheek Chauhan 124098adc4 scripts: Auto-detect whether we can enable colors
Also do the setup necessary on Windows to enable ANSI colours on the
console (if available). That code is copied from Meson and is Apache2
licensed.
2019-02-05 17:23:49 +05:30

103 lines
2.8 KiB
Python

import os
import sys
import shlex
import shutil
import argparse
import platform
import subprocess
ROOTDIR = os.path.abspath(os.path.dirname(__file__))
class Colors:
HEADER = '\033[95m'
OKBLUE = '\033[94m'
OKGREEN = '\033[92m'
WARNING = '\033[93m'
FAIL = '\033[91m'
ENDC = '\033[0m'
force_disable = False
def _windows_ansi():
from ctypes import windll, byref
from ctypes.wintypes import DWORD
kernel = windll.kernel32
stdout = kernel.GetStdHandle(-11)
mode = DWORD()
if not kernel.GetConsoleMode(stdout, byref(mode)):
return False
# Try setting ENABLE_VIRTUAL_TERMINAL_PROCESSING (0x4)
# If that fails (returns 0), we disable colors
return kernel.SetConsoleMode(stdout, mode.value | 0x4) or os.environ.get('ANSICON')
@classmethod
def can_enable(cls):
if not os.isatty(sys.stdout.fileno()):
return False
if platform.system().lower() == 'windows':
return cls._windows_ansi()
return os.environ.get('TERM') != 'dumb'
@classmethod
def disable(cls):
cls.HEADER = ''
cls.OKBLUE = ''
cls.OKGREEN = ''
cls.WARNING = ''
cls.FAIL = ''
cls.ENDC = ''
@classmethod
def enable(cls):
if cls.force_disable:
return
cls.HEADER = '\033[95m'
cls.OKBLUE = '\033[94m'
cls.OKGREEN = '\033[92m'
cls.WARNING = '\033[93m'
cls.FAIL = '\033[91m'
cls.ENDC = '\033[0m'
def git(*args, repository_path='.'):
return subprocess.check_output(["git"] + list(args), cwd=repository_path,
stdin=subprocess.DEVNULL,
stderr=subprocess.STDOUT).decode()
def accept_command(commands):
"""Search @commands and returns the first found absolute path."""
for command in commands:
command = shutil.which(command)
if command:
return command
return None
def get_meson():
meson = os.path.join(ROOTDIR, 'meson', 'meson.py')
if os.path.exists(meson):
return [sys.executable, meson]
mesonintrospect = os.environ.get('MESONINTROSPECT', '')
for comp in shlex.split (mesonintrospect):
# mesonintrospect might look like "/usr/bin/python /somewhere/meson introspect",
# let's not get tricked
if 'python' in os.path.basename (comp):
continue
if os.path.exists(comp):
if comp.endswith('.py'):
return [sys.executable, comp]
else:
return [comp]
meson = accept_command(['meson.py'])
if meson:
return [sys.executable, meson]
meson = accept_command(['meson'])
if meson:
return [meson]
raise RuntimeError('Could not find Meson')