gstreamer/common.py
Nirbheek Chauhan d422c2b791 gst-uninstalled: Try to use short names for env vars on Windows
Try even harder to not hit the maximum length limit for env var values
on Windows. Reduces the size by ~1000 characters on my machine.
2019-04-15 15:36:08 +05:30

124 lines
3.5 KiB
Python

import os
import sys
import shlex
import shutil
import argparse
import platform
import subprocess
ROOTDIR = os.path.abspath(os.path.dirname(__file__))
if os.name is 'nt':
import ctypes
from ctypes import wintypes
_GetShortPathNameW = ctypes.windll.kernel32.GetShortPathNameW
_GetShortPathNameW.argtypes = [wintypes.LPCWSTR, wintypes.LPWSTR, wintypes.DWORD]
_GetShortPathNameW.restype = wintypes.DWORD
def win32_get_short_path_name(long_name):
"""
Gets the short path name of a given long path.
http://stackoverflow.com/a/23598461/200291
"""
output_buf_size = 0
while True:
output_buf = ctypes.create_unicode_buffer(output_buf_size)
needed = _GetShortPathNameW(long_name, output_buf, output_buf_size)
if output_buf_size >= needed:
return output_buf.value
else:
output_buf_size = needed
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')