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"""utils for patching libraries"""
# Copyright (c) PyZMQ Developers.
# Distributed under the terms of the Modified BSD License.
import re
import sys
import os
import logging
from .misc import get_output_error
pjoin = os.path.join
# LIB_PAT from delocate
LIB_PAT = re.compile(r"\s*(.*) \(compatibility version (\d+\.\d+\.\d+), "
r"current version (\d+\.\d+\.\d+)\)")
def _get_libs(fname):
rc, so, se = get_output_error(['otool', '-L', fname])
if rc:
logging.error("otool -L %s failed: %r" % (fname, se))
return
for line in so.splitlines()[1:]:
m = LIB_PAT.match(line)
if m:
yield m.group(1)
def _find_library(lib, path):
"""Find a library"""
for d in path[::-1]:
real_lib = os.path.join(d, lib)
if os.path.exists(real_lib):
return real_lib
def _install_name_change(fname, lib, real_lib):
rc, so, se = get_output_error(['install_name_tool', '-change', lib, real_lib, fname])
if rc:
logging.error("Couldn't update load path: %s", se)
def patch_lib_paths(fname, library_dirs):
"""Load any weakly-defined libraries from their real location
(only on OS X)
- Find libraries with `otool -L`
- Update with `install_name_tool -change`
"""
if sys.platform != 'darwin':
return
libs = _get_libs(fname)
for lib in libs:
if not lib.startswith(('@', '/')):
real_lib = _find_library(lib, library_dirs)
if real_lib:
_install_name_change(fname, lib, real_lib)
__all__ = ['patch_lib_paths']
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