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# -----------------------------------------------------------------------------
# Utils
import errno
import os
import subprocess
import shutil
def version_to_ints(v):
return [ int(x) for x in v.split('.') ]
def version_lt(x, y):
return version_to_ints(x) < version_to_ints(y)
def version_le(x, y):
return version_to_ints(x) <= version_to_ints(y)
def version_gt(x, y):
return version_to_ints(x) > version_to_ints(y)
def version_ge(x, y):
return version_to_ints(x) >= version_to_ints(y)
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 as it's not available in Python 2.6;
# It's also not quite the same as 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: " + str(cmd_and_args))
return stdout
def mkdirp(path):
try:
os.makedirs(path)
except OSError as e:
if e.errno == errno.EEXIST and os.path.isdir(path):
pass
else:
raise
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. Except when using msys2, as ghc
# does. Then it copies the source file, instead of creating a symbolic
# link to it. We define the following function to make this magic more
# explicit/discoverable. You are enouraged to use it instead of
# os.symlink.
link_or_copy_file = getattr(os, "symlink", shutil.copyfile)
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