Dep_binary

plugin_dep.py

import ctypes
import os

from __future__ import absolute_import
from __future__ import unicode_literals
from __future__ import print_function

from commoncode import system
from commoncode import command

from pluggy import HookimplMarker
from pluggy import HookspecMarker
from pluggy import PluginManager

bin_dep_spec = HookspecMarker('bin_dep_plugin')
bin_dep_plugin = HookimplMarker('bin_dep_plugin')

#
# OS/Arch
#
current_os, current_arch = os_arch()
on_windows = current_os == 'win'
on_mac = current_os == 'mac'
on_linux = current_os == 'linux'
on_posix = not on_windows and (on_mac or on_linux)


current_os_arch = '%(current_os)s-%(current_arch)s' % locals()
noarch = 'noarch'
current_os_noarch = '%(current_os)s-%(noarch)s' % locals()
    
#
# Shared library file extensions
#
if on_windows:
    lib_ext = '.dll'
if on_mac:
    lib_ext = '.dylib'
if on_linux:
    lib_ext = '.so'



@bin_dep_spec
def get_bin_dep(libname):
    """specification for getting lib on various platforms(i.e. os/arch)
    """
    pass

@bin_dep_plugin
def get_bin_dep(libname):
    """Implementation of plugin to get path for typecode binaries 
    """
    data_dir = os.path.join(os.path.dirname(__file__), 'data')
    bin_dir = os.path.join(os.path.dirname(__file__), 'bin')

    root_dir = command.get_base_dir(bin_dir)[0]
    # now command.load_lib(libname, root_dir) can be called

    try:
        command.load_lib(libname, root_dir)
    except ImportError:
        lib = ctypes.CDLL(libname+system.lib_ext)
        if lib:
            return lib
        raise ImportError('Failed to load %(libname)s' % locals())