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106 lines
2.8 KiB
106 lines
2.8 KiB
import glob
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import os
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import shutil
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import subprocess
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from contextlib import contextmanager
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from tempfile import mkdtemp
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@contextmanager
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def workdir():
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cwd = os.getcwd()
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tmpdir = mkdtemp()
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os.chdir(tmpdir)
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try:
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yield
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finally:
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os.chdir(cwd)
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shutil.rmtree(tmpdir)
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@contextmanager
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def redirect(stdchannel, dest_filename):
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oldstdchannel = os.dup(stdchannel.fileno())
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dest_file = open(dest_filename, 'w')
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os.dup2(dest_file.fileno(), stdchannel.fileno())
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try:
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yield
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finally:
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if oldstdchannel is not None:
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os.dup2(oldstdchannel, stdchannel.fileno())
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if dest_file is not None:
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dest_file.close()
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def absolute(*paths):
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op = os.path
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return op.realpath(op.abspath(op.join(op.dirname(__file__), *paths)))
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def build_flags(library, type_, path):
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"""Return separated build flags from pkg-config output"""
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pkg_config_path = [path]
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if 'PKG_CONFIG_PATH' in os.environ:
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pkg_config_path.append(os.environ['PKG_CONFIG_PATH'])
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if 'LIB_DIR' in os.environ:
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pkg_config_path.append(os.environ['LIB_DIR'])
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pkg_config_path.append(os.path.join(os.environ['LIB_DIR'], 'pkgconfig'))
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options = ['--static', {'I': '--cflags-only-I', 'L': '--libs-only-L', 'l': '--libs-only-l'}[type_]]
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return [
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flag.strip('-{}'.format(type_))
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for flag in subprocess.check_output(
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['pkg-config'] + options + [library], env=dict(os.environ, PKG_CONFIG_PATH=':'.join(pkg_config_path))
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)
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.decode('UTF-8')
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.split()
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]
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def _find_lib():
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if 'COINCURVE_IGNORE_SYSTEM_LIB' in os.environ:
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return False
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from cffi import FFI
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ffi = FFI()
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try:
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ffi.dlopen('secp256k1')
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if os.path.exists('/usr/include/secp256k1_ecdh.h'):
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return True
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else:
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# The system library lacks the ecdh module
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return False
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except OSError:
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if 'LIB_DIR' in os.environ:
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for path in glob.glob(os.path.join(os.environ['LIB_DIR'], '*secp256k1*')):
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try:
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FFI().dlopen(path)
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return True
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except OSError:
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pass
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# We couldn't locate libsecp256k1 so we'll use the bundled one
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return False
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else:
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# If we got this far then the system library should be good enough
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return True
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_has_system_lib = None
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def has_system_lib():
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global _has_system_lib
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if _has_system_lib is None:
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_has_system_lib = _find_lib()
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return _has_system_lib
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def detect_dll():
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here = os.path.dirname(os.path.abspath(__file__))
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for fn in os.listdir(os.path.join(here, 'coincurve')):
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if fn.endswith('.dll'):
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return True
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return False
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