144 lines
4.1 KiB
Python
144 lines
4.1 KiB
Python
"""
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dyld emulation
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"""
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__all__ = [
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"dyld_framework",
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"dyld_library",
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"dyld_find",
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"pathForFramework",
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"infoForFramework",
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]
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import os
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from objc._framework import infoForFramework
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from objc._objc import _dyld_shared_cache_contains_path
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# These are the defaults as per man dyld(1)
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#
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DEFAULT_FRAMEWORK_FALLBACK = ":".join(
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[
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os.path.expanduser("~/Library/Frameworks"),
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"/Library/Frameworks",
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"/Network/Library/Frameworks",
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"/System/Library/Frameworks",
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]
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)
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DEFAULT_LIBRARY_FALLBACK = ":".join(
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[os.path.expanduser("~/lib"), "/usr/local/lib", "/lib", "/usr/lib"]
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)
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def ensure_unicode(s):
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"""Not all of PyObjC understands unicode paths very well yet"""
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if isinstance(s, bytes):
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return s.decode("utf-8")
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return s
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def inject_suffixes(iterator):
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suffix = ensure_unicode(os.environ.get("DYLD_IMAGE_SUFFIX", None))
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if suffix is None:
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return iterator
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def _inject(iterator=iterator, suffix=suffix):
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for path in iterator:
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if path.endswith(".dylib"):
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yield path[:-6] + suffix + ".dylib"
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else:
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yield path + suffix
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yield path
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return _inject()
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def dyld_framework(filename, framework_name, version=None):
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"""Find a framework using dyld semantics"""
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filename = ensure_unicode(filename)
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framework_name = ensure_unicode(framework_name)
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version = ensure_unicode(version)
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def _search():
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spath = ensure_unicode(os.environ.get("DYLD_FRAMEWORK_PATH", None))
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if spath is not None:
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for path in spath.split(":"):
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if version:
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yield os.path.join(
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path,
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framework_name + ".framework",
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"Versions",
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version,
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framework_name,
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)
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else:
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yield os.path.join(
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path, framework_name + ".framework", framework_name
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)
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yield filename
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spath = ensure_unicode(
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os.environ.get("DYLD_FALLBACK_FRAMEWORK_PATH", DEFAULT_FRAMEWORK_FALLBACK)
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)
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for path in spath.split(":"):
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if version:
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yield os.path.join(
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path,
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framework_name + ".framework",
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"Versions",
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version,
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framework_name,
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)
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else:
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yield os.path.join(path, framework_name + ".framework", framework_name)
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for f in inject_suffixes(_search()):
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if _dyld_shared_cache_contains_path(f):
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return f
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if os.path.exists(f):
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return f
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# raise ..
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raise ImportError(f"Framework {framework_name} could not be found")
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def dyld_library(filename, libname):
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"""Find a dylib using dyld semantics"""
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filename = ensure_unicode(filename)
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libname = ensure_unicode(libname)
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def _search():
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spath = ensure_unicode(os.environ.get("DYLD_LIBRARY_PATH", None))
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if spath is not None:
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for path in spath.split(":"):
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yield os.path.join(path, libname)
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yield filename
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spath = ensure_unicode(
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os.environ.get("DYLD_FALLBACK_LIBRARY_PATH", DEFAULT_LIBRARY_FALLBACK)
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)
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for path in spath.split(":"):
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yield os.path.join(path, libname)
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for f in inject_suffixes(_search()):
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if _dyld_shared_cache_contains_path(f):
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return f
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if os.path.exists(f):
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return f
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raise ValueError(f"dylib {filename} could not be found")
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def dyld_find(filename):
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"""Generic way to locate a dyld framework or dyld"""
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filename = os.path.realpath(filename)
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res = infoForFramework(filename)
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if res:
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framework_loc, framework_name, version = res
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return dyld_framework(filename, framework_name, version)
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else:
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return dyld_library(filename, os.path.basename(filename))
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def pathForFramework(path):
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fpath, name, version = infoForFramework(dyld_find(path))
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return os.path.join(fpath, name + ".framework")
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