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convert.py
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import os.path import re import shutil import sys import tempfile import zipfile from distutils import dist from glob import iglob from ..bdist_wheel import bdist_wheel from ..wheelfile import WheelFile from . import WheelError, require_pkgresources egg_info_re = re.compile(r''' (?P<name>.+?)-(?P<ver>.+?) (-(?P<pyver>py\d\.\d+) (-(?P<arch>.+?))? )?.egg$''', re.VERBOSE) class _bdist_wheel_tag(bdist_wheel): # allow the client to override the default generated wheel tag # The default bdist_wheel implementation uses python and abi tags # of the running python process. This is not suitable for # generating/repackaging prebuild binaries. full_tag_supplied = False full_tag = None # None or a (pytag, soabitag, plattag) triple def get_tag(self): if self.full_tag_supplied and self.full_tag is not None: return self.full_tag else: return bdist_wheel.get_tag(self) def egg2wheel(egg_path, dest_dir): filename = os.path.basename(egg_path) match = egg_info_re.match(filename) if not match: raise WheelError('Invalid egg file name: {}'.format(filename)) egg_info = match.groupdict() dir = tempfile.mkdtemp(suffix="_e2w") if os.path.isfile(egg_path): # assume we have a bdist_egg otherwise with zipfile.ZipFile(egg_path) as egg: egg.extractall(dir) else: # support buildout-style installed eggs directories for pth in os.listdir(egg_path): src = os.path.join(egg_path, pth) if os.path.isfile(src): shutil.copy2(src, dir) else: shutil.copytree(src, os.path.join(dir, pth)) pyver = egg_info['pyver'] if pyver: pyver = egg_info['pyver'] = pyver.replace('.', '') arch = (egg_info['arch'] or 'any').replace('.', '_').replace('-', '_') # assume all binary eggs are for CPython abi = 'cp' + pyver[2:] if arch != 'any' else 'none' root_is_purelib = egg_info['arch'] is None if root_is_purelib: bw = bdist_wheel(dist.Distribution()) else: bw = _bdist_wheel_tag(dist.Distribution()) bw.root_is_pure = root_is_purelib bw.python_tag = pyver bw.plat_name_supplied = True bw.plat_name = egg_info['arch'] or 'any' if not root_is_purelib: bw.full_tag_supplied = True bw.full_tag = (pyver, abi, arch) dist_info_dir = os.path.join(dir, '{name}-{ver}.dist-info'.format(**egg_info)) bw.egg2dist(os.path.join(dir, 'EGG-INFO'), dist_info_dir) bw.write_wheelfile(dist_info_dir, generator='egg2wheel') wheel_name = '{name}-{ver}-{pyver}-{}-{}.whl'.format(abi, arch, **egg_info) with WheelFile(os.path.join(dest_dir, wheel_name), 'w') as wf: wf.write_files(dir) shutil.rmtree(dir) def parse_wininst_info(wininfo_name, egginfo_name): """Extract metadata from filenames. Extracts the 4 metadataitems needed (name, version, pyversion, arch) from the installer filename and the name of the egg-info directory embedded in the zipfile (if any). The egginfo filename has the format:: name-ver(-pyver)(-arch).egg-info The installer filename has the format:: name-ver.arch(-pyver).exe Some things to note: 1. The installer filename is not definitive. An installer can be renamed and work perfectly well as an installer. So more reliable data should be used whenever possible. 2. The egg-info data should be preferred for the name and version, because these come straight from the distutils metadata, and are mandatory. 3. The pyver from the egg-info data should be ignored, as it is constructed from the version of Python used to build the installer, which is irrelevant - the installer filename is correct here (even to the point that when it's not there, any version is implied). 4. The architecture must be taken from the installer filename, as it is not included in the egg-info data. 5. Architecture-neutral installers still have an architecture because the installer format itself (being executable) is architecture-specific. We should therefore ignore the architecture if the content is pure-python. """ egginfo = None if egginfo_name: egginfo = egg_info_re.search(egginfo_name) if not egginfo: raise ValueError("Egg info filename %s is not valid" % (egginfo_name,)) # Parse the wininst filename # 1. Distribution name (up to the first '-') w_name, sep, rest = wininfo_name.partition('-') if not sep: raise ValueError("Installer filename %s is not valid" % (wininfo_name,)) # Strip '.exe' rest = rest[:-4] # 2. Python version (from the last '-', must start with 'py') rest2, sep, w_pyver = rest.rpartition('-') if sep and w_pyver.startswith('py'): rest = rest2 w_pyver = w_pyver.replace('.', '') else: # Not version specific - use py2.py3. While it is possible that # pure-Python code is not compatible with both Python 2 and 3, there # is no way of knowing from the wininst format, so we assume the best # here (the user can always manually rename the wheel to be more # restrictive if needed). w_pyver = 'py2.py3' # 3. Version and architecture w_ver, sep, w_arch = rest.rpartition('.') if not sep: raise ValueError("Installer filename %s is not valid" % (wininfo_name,)) if egginfo: w_name = egginfo.group('name') w_ver = egginfo.group('ver') return {'name': w_name, 'ver': w_ver, 'arch': w_arch, 'pyver': w_pyver} def wininst2wheel(path, dest_dir): with zipfile.ZipFile(path) as bdw: # Search for egg-info in the archive egginfo_name = None for filename in bdw.namelist(): if '.egg-info' in filename: egginfo_name = filename break info = parse_wininst_info(os.path.basename(path), egginfo_name) root_is_purelib = True for zipinfo in bdw.infolist(): if zipinfo.filename.startswith('PLATLIB'): root_is_purelib = False break if root_is_purelib: paths = {'purelib': ''} else: paths = {'platlib': ''} dist_info = "%(name)s-%(ver)s" % info datadir = "%s.data/" % dist_info # rewrite paths to trick ZipFile into extracting an egg # XXX grab wininst .ini - between .exe, padding, and first zip file. members = [] egginfo_name = '' for zipinfo in bdw.infolist(): key, basename = zipinfo.filename.split('/', 1) key = key.lower() basepath = paths.get(key, None) if basepath is None: basepath = datadir + key.lower() + '/' oldname = zipinfo.filename newname = basepath + basename zipinfo.filename = newname del bdw.NameToInfo[oldname] bdw.NameToInfo[newname] = zipinfo # Collect member names, but omit '' (from an entry like "PLATLIB/" if newname: members.append(newname) # Remember egg-info name for the egg2dist call below if not egginfo_name: if newname.endswith('.egg-info'): egginfo_name = newname elif '.egg-info/' in newname: egginfo_name, sep, _ = newname.rpartition('/') dir = tempfile.mkdtemp(suffix="_b2w") bdw.extractall(dir, members) # egg2wheel abi = 'none' pyver = info['pyver'] arch = (info['arch'] or 'any').replace('.', '_').replace('-', '_') # Wininst installers always have arch even if they are not # architecture-specific (because the format itself is). # So, assume the content is architecture-neutral if root is purelib. if root_is_purelib: arch = 'any' # If the installer is architecture-specific, it's almost certainly also # CPython-specific. if arch != 'any': pyver = pyver.replace('py', 'cp') wheel_name = '-'.join((dist_info, pyver, abi, arch)) if root_is_purelib: bw = bdist_wheel(dist.Distribution()) else: bw = _bdist_wheel_tag(dist.Distribution()) bw.root_is_pure = root_is_purelib bw.python_tag = pyver bw.plat_name_supplied = True bw.plat_name = info['arch'] or 'any' if not root_is_purelib: bw.full_tag_supplied = True bw.full_tag = (pyver, abi, arch) dist_info_dir = os.path.join(dir, '%s.dist-info' % dist_info) bw.egg2dist(os.path.join(dir, egginfo_name), dist_info_dir) bw.write_wheelfile(dist_info_dir, generator='wininst2wheel') wheel_path = os.path.join(dest_dir, wheel_name) with WheelFile(wheel_path, 'w') as wf: wf.write_files(dir) shutil.rmtree(dir) def convert(files, dest_dir, verbose): # Only support wheel convert if pkg_resources is present require_pkgresources('wheel convert') for pat in files: for installer in iglob(pat): if os.path.splitext(installer)[1] == '.egg': conv = egg2wheel else: conv = wininst2wheel if verbose: print("{}... ".format(installer)) sys.stdout.flush() conv(installer, dest_dir) if verbose: print("OK")