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import os
import platform
import subprocess
import shutil
import threading
def strip_quotes(s):
# Don't wrap commands to subprocess.call/Popen in quotes.
return s.strip('\'"')
def getStdout(cmd_and_args):
# Can't use subprocess.check_output, since we also verify that
# no stderr was produced
p = subprocess.Popen([strip_quotes(cmd_and_args[0])] + cmd_and_args[1:],
stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
(stdout, stderr) = p.communicate()
r = p.wait()
if r != 0:
raise Exception("Command failed: " + str(cmd_and_args))
if stderr:
raise Exception("stderr from command: %s\nOutput:\n%s\n" % (cmd_and_args, stderr))
return stdout.decode('utf-8')
def lndir(srcdir, dstdir):
# Create symlinks for all files in src directory.
# Not all developers might have lndir installed.
# os.system('lndir -silent {0} {1}'.format(srcdir, dstdir))
for filename in os.listdir(srcdir):
src = os.path.join(srcdir, filename)
dst = os.path.join(dstdir, filename)
if os.path.isfile(src):
link_or_copy_file(src, dst)
else:
os.mkdir(dst)
lndir(src, dst)
# On Windows, os.symlink is not defined with Python 2.7, but is in Python 3
# when using msys2, as GHC does. Unfortunately, only Administrative users have
# the privileges necessary to create symbolic links by default. Consequently we
# are forced to just copy instead.
#
# We define the following function to make this magic more
# explicit/discoverable. You are enouraged to use it instead of os.symlink.
if platform.system() == 'Windows':
link_or_copy_file = shutil.copyfile
else:
link_or_copy_file = os.symlink
class Watcher(object):
def __init__(self, count):
self.pool = count
self.evt = threading.Event()
self.sync_lock = threading.Lock()
if count <= 0:
self.evt.set()
def wait(self):
self.evt.wait()
def notify(self):
self.sync_lock.acquire()
self.pool -= 1
if self.pool <= 0:
self.evt.set()
self.sync_lock.release()
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