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""" Support for installing and building the "wheel" binary package format. """ from __future__ import with_statement import compileall import csv import functools import hashlib import os import re import shutil import sys from base64 import urlsafe_b64encode from email.parser import Parser from pip.backwardcompat import ConfigParser, StringIO from pip.exceptions import InvalidWheelFilename, UnsupportedWheel from pip.locations import distutils_scheme from pip.log import logger from pip import pep425tags from pip.util import call_subprocess, normalize_path, make_path_relative from pip._vendor import pkg_resources from pip._vendor.distlib.scripts import ScriptMaker from pip._vendor import pkg_resources wheel_ext = '.whl' VERSION_COMPATIBLE = (1, 0) def rehash(path, algo='sha256', blocksize=1<<20): """Return (hash, length) for path using hashlib.new(algo)""" h = hashlib.new(algo) length = 0 with open(path, 'rb') as f: block = f.read(blocksize) while block: length += len(block) h.update(block) block = f.read(blocksize) digest = 'sha256='+urlsafe_b64encode(h.digest()).decode('latin1').rstrip('=') return (digest, length) try: unicode def binary(s): if isinstance(s, unicode): return s.encode('ascii') return s except NameError: def binary(s): if isinstance(s, str): return s.encode('ascii') def open_for_csv(name, mode): if sys.version_info[0] < 3: nl = {} bin = 'b' else: nl = { 'newline': '' } bin = '' return open(name, mode + bin, **nl) def fix_script(path): """Replace #!python with #!/path/to/python Return True if file was changed.""" # XXX RECORD hashes will need to be updated if os.path.isfile(path): script = open(path, 'rb') try: firstline = script.readline() if not firstline.startswith(binary('#!python')): return False exename = sys.executable.encode(sys.getfilesystemencoding()) firstline = binary('#!') + exename + binary(os.linesep) rest = script.read() finally: script.close() script = open(path, 'wb') try: script.write(firstline) script.write(rest) finally: script.close() return True dist_info_re = re.compile(r"""^(?P<namever>(?P<name>.+?)(-(?P<ver>\d.+?))?) \.dist-info$""", re.VERBOSE) def root_is_purelib(name, wheeldir): """ Return True if the extracted wheel in wheeldir should go into purelib. """ name_folded = name.replace("-", "_") for item in os.listdir(wheeldir): match = dist_info_re.match(item) if match and match.group('name') == name_folded: with open(os.path.join(wheeldir, item, 'WHEEL')) as wheel: for line in wheel: line = line.lower().rstrip() if line == "root-is-purelib: true": return True return False def get_entrypoints(filename): if not os.path.exists(filename): return {}, {} # This is done because you can pass a string to entry_points wrappers which # means that they may or may not be valid INI files. The attempt here is to # strip leading and trailing whitespace in order to make them valid INI # files. with open(filename) as fp: data = StringIO() for line in fp: data.write(line.strip()) data.write("\n") data.seek(0) cp = ConfigParser.RawConfigParser() cp.readfp(data) console = {} gui = {} if cp.has_section('console_scripts'): console = dict(cp.items('console_scripts')) if cp.has_section('gui_scripts'): gui = dict(cp.items('gui_scripts')) return console, gui def move_wheel_files(name, req, wheeldir, user=False, home=None, root=None, pycompile=True, scheme=None, strip_file_prefix=None): """Install a wheel""" if not scheme: scheme = distutils_scheme(name, user=user, home=home, root=root) if root_is_purelib(name, wheeldir): lib_dir = scheme['purelib'] else: lib_dir = scheme['platlib'] info_dir = [] data_dirs = [] source = wheeldir.rstrip(os.path.sep) + os.path.sep # Record details of the files moved # installed = files copied from the wheel to the destination # changed = files changed while installing (scripts #! line typically) # generated = files newly generated during the install (script wrappers) installed = {} changed = set() generated = [] # Compile all of the pyc files that we're going to be installing if pycompile: compileall.compile_dir(source, force=True, quiet=True) def normpath(src, p): return make_path_relative(src, p).replace(os.path.sep, '/') def record_installed(srcfile, destfile, modified=False): """Map archive RECORD paths to installation RECORD paths.""" oldpath = normpath(srcfile, wheeldir) newpath = normpath(destfile, lib_dir) installed[oldpath] = newpath if modified: changed.add(destfile) def clobber(source, dest, is_base, fixer=None, filter=None): if not os.path.exists(dest): # common for the 'include' path os.makedirs(dest) for dir, subdirs, files in os.walk(source): basedir = dir[len(source):].lstrip(os.path.sep) destdir = os.path.join(dest, basedir) if is_base and basedir.split(os.path.sep, 1)[0].endswith('.data'): continue for s in subdirs: destsubdir = os.path.join(dest, basedir, s) if is_base and basedir == '' and destsubdir.endswith('.data'): data_dirs.append(s) continue elif (is_base and s.endswith('.dist-info') # is self.req.project_name case preserving? and s.lower().startswith(req.project_name.replace('-', '_').lower())): assert not info_dir, 'Multiple .dist-info directories' info_dir.append(destsubdir) for f in files: # Skip unwanted files if filter and filter(f): continue srcfile = os.path.join(dir, f) destfile = os.path.join(dest, basedir, f) # directory creation is lazy and after the file filtering above # to ensure we don't install empty dirs; empty dirs can't be # uninstalled. if not os.path.exists(destdir): os.makedirs(destdir) # use copy2 (not move) to be extra sure we're not moving # directories over; copy2 fails for directories. this would # fail tests (not during released/user execution) shutil.copy2(srcfile, destfile) changed = False if fixer: changed = fixer(destfile) record_installed(srcfile, destfile, changed) clobber(source, lib_dir, True) assert info_dir, "%s .dist-info directory not found" % req # Get the defined entry points ep_file = os.path.join(info_dir[0], 'entry_points.txt') console, gui = get_entrypoints(ep_file) def is_entrypoint_wrapper(name): # EP, EP.exe and EP-script.py are scripts generated for # entry point EP by setuptools if name.lower().endswith('.exe'): matchname = name[:-4] elif name.lower().endswith('-script.py'): matchname = name[:-10] elif name.lower().endswith(".pya"): matchname = name[:-4] else: matchname = name # Ignore setuptools-generated scripts return (matchname in console or matchname in gui) for datadir in data_dirs: fixer = None filter = None for subdir in os.listdir(os.path.join(wheeldir, datadir)): fixer = None if subdir == 'scripts': fixer = fix_script filter = is_entrypoint_wrapper source = os.path.join(wheeldir, datadir, subdir) dest = scheme[subdir] clobber(source, dest, False, fixer=fixer, filter=filter) maker = ScriptMaker(None, scheme['scripts']) # Ensure we don't generate any variants for scripts because this is almost # never what somebody wants. # See https://bitbucket.org/pypa/distlib/issue/35/ maker.variants = set(('', )) # This is required because otherwise distlib creates scripts that are not # executable. # See https://bitbucket.org/pypa/distlib/issue/32/ maker.set_mode = True # Simplify the script and fix the fact that the default script swallows # every single stack trace. # See https://bitbucket.org/pypa/distlib/issue/34/ # See https://bitbucket.org/pypa/distlib/issue/33/ def _get_script_text(entry): return maker.script_template % { "module": entry.prefix, "import_name": entry.suffix.split(".")[0], "func": entry.suffix, } maker._get_script_text = _get_script_text maker.script_template = """# -*- coding: utf-8 -*- import re import sys from %(module)s import %(import_name)s if __name__ == '__main__': sys.argv[0] = re.sub(r'(-script\.pyw|\.exe)?$', '', sys.argv[0]) sys.exit(%(func)s()) """ # Special case pip and setuptools to generate versioned wrappers # # The issue is that some projects (specifically, pip and setuptools) use # code in setup.py to create "versioned" entry points - pip2.7 on Python # 2.7, pip3.3 on Python 3.3, etc. But these entry points are baked into # the wheel metadata at build time, and so if the wheel is installed with # a *different* version of Python the entry points will be wrong. The # correct fix for this is to enhance the metadata to be able to describe # such versioned entry points, but that won't happen till Metadata 2.0 is # available. # In the meantime, projects using versioned entry points will either have # incorrect versioned entry points, or they will not be able to distribute # "universal" wheels (i.e., they will need a wheel per Python version). # # Because setuptools and pip are bundled with _ensurepip and virtualenv, # we need to use universal wheels. So, as a stopgap until Metadata 2.0, we # override the versioned entry points in the wheel and generate the # correct ones. This code is purely a short-term measure until Metadat 2.0 # is available. # # To add the level of hack in this section of code, in order to support # ensurepip this code will look for an ``ENSUREPIP_OPTIONS`` environment # variable which will control which version scripts get installed. # # ENSUREPIP_OPTIONS=altinstall # - Only pipX.Y and easy_install-X.Y will be generated and installed # ENSUREPIP_OPTIONS=install # - pipX.Y, pipX, easy_install-X.Y will be generated and installed. Note # that this option is technically if ENSUREPIP_OPTIONS is set and is # not altinstall # DEFAULT # - The default behavior is to install pip, pipX, pipX.Y, easy_install # and easy_install-X.Y. pip_script = console.pop('pip', None) if pip_script: if "ENSUREPIP_OPTIONS" not in os.environ: spec = 'pip = ' + pip_script generated.extend(maker.make(spec)) if os.environ.get("ENSUREPIP_OPTIONS", "") != "altinstall": spec = 'pip%s = %s' % (sys.version[:1], pip_script) generated.extend(maker.make(spec)) spec = 'pip%s = %s' % (sys.version[:3], pip_script) generated.extend(maker.make(spec)) # Delete any other versioned pip entry points pip_ep = [k for k in console if re.match(r'pip(\d(\.\d)?)?$', k)] for k in pip_ep: del console[k] easy_install_script = console.pop('easy_install', None) if easy_install_script: if "ENSUREPIP_OPTIONS" not in os.environ: spec = 'easy_install = ' + easy_install_script generated.extend(maker.make(spec)) spec = 'easy_install-%s = %s' % (sys.version[:3], easy_install_script) generated.extend(maker.make(spec)) # Delete any other versioned easy_install entry points easy_install_ep = [k for k in console if re.match(r'easy_install(-\d\.\d)?$', k)] for k in easy_install_ep: del console[k] # Generate the console and GUI entry points specified in the wheel if len(console) > 0: generated.extend(maker.make_multiple(['%s = %s' % kv for kv in console.items()])) if len(gui) > 0: generated.extend(maker.make_multiple(['%s = %s' % kv for kv in gui.items()], {'gui': True})) record = os.path.join(info_dir[0], 'RECORD') temp_record = os.path.join(info_dir[0], 'RECORD.pip') with open_for_csv(record, 'r') as record_in: with open_for_csv(temp_record, 'w+') as record_out: reader = csv.reader(record_in) writer = csv.writer(record_out) for row in reader: row[0] = installed.pop(row[0], row[0]) if row[0] in changed: row[1], row[2] = rehash(row[0]) writer.writerow(row) for f in generated: h, l = rehash(f) if strip_file_prefix and f.startswith(strip_file_prefix): f = os.path.join(os.sep, os.path.relpath(f, strip_file_prefix)) writer.writerow((f, h, l)) for f in installed: writer.writerow((installed[f], '', '')) shutil.move(temp_record, record) def _unique(fn): @functools.wraps(fn) def unique(*args, **kw): seen = set() for item in fn(*args, **kw): if item not in seen: seen.add(item) yield item return unique # TODO: this goes somewhere besides the wheel module @_unique def uninstallation_paths(dist): """ Yield all the uninstallation paths for dist based on RECORD-without-.pyc Yield paths to all the files in RECORD. For each .py file in RECORD, add the .pyc in the same directory. UninstallPathSet.add() takes care of the __pycache__ .pyc. """ from pip.req import FakeFile # circular import r = csv.reader(FakeFile(dist.get_metadata_lines('RECORD'))) for row in r: path = os.path.join(dist.location, row[0]) yield path if path.endswith('.py'): dn, fn = os.path.split(path) base = fn[:-3] path = os.path.join(dn, base+'.pyc') yield path def wheel_version(source_dir): """ Return the Wheel-Version of an extracted wheel, if possible. Otherwise, return False if we couldn't parse / extract it. """ try: dist = [d for d in pkg_resources.find_on_path(None, source_dir)][0] wheel_data = dist.get_metadata('WHEEL') wheel_data = Parser().parsestr(wheel_data) version = wheel_data['Wheel-Version'].strip() version = tuple(map(int, version.split('.'))) return version except: return False def check_compatibility(version, name): """ Raises errors or warns if called with an incompatible Wheel-Version. Pip should refuse to install a Wheel-Version that's a major series ahead of what it's compatible with (e.g 2.0 > 1.1); and warn when installing a version only minor version ahead (e.g 1.2 > 1.1). version: a 2-tuple representing a Wheel-Version (Major, Minor) name: name of wheel or package to raise exception about :raises UnsupportedWheel: when an incompatible Wheel-Version is given """ if not version: raise UnsupportedWheel( "%s is in an unsupported or invalid wheel" % name ) if version[0] > VERSION_COMPATIBLE[0]: raise UnsupportedWheel( "%s's Wheel-Version (%s) is not compatible with this version " "of pip" % (name, '.'.join(map(str, version))) ) elif version > VERSION_COMPATIBLE: logger.warn('Installing from a newer Wheel-Version (%s)' % '.'.join(map(str, version))) class Wheel(object): """A wheel file""" # TODO: maybe move the install code into this class wheel_file_re = re.compile( r"""^(?P<namever>(?P<name>.+?)-(?P<ver>\d.*?)) ((-(?P<build>\d.*?))?-(?P<pyver>.+?)-(?P<abi>.+?)-(?P<plat>.+?) \.whl|\.dist-info)$""", re.VERBOSE) def __init__(self, filename): """ :raises InvalidWheelFilename: when the filename is invalid for a wheel """ wheel_info = self.wheel_file_re.match(filename) if not wheel_info: raise InvalidWheelFilename("%s is not a valid wheel filename." % filename) self.filename = filename self.name = wheel_info.group('name').replace('_', '-') # we'll assume "_" means "-" due to wheel naming scheme # (https://github.com/pypa/pip/issues/1150) self.version = wheel_info.group('ver').replace('_', '-') self.pyversions = wheel_info.group('pyver').split('.') self.abis = wheel_info.group('abi').split('.') self.plats = wheel_info.group('plat').split('.') # All the tag combinations from this file self.file_tags = set((x, y, z) for x in self.pyversions for y in self.abis for z in self.plats) def support_index_min(self, tags=None): """ Return the lowest index that one of the wheel's file_tag combinations achieves in the supported_tags list e.g. if there are 8 supported tags, and one of the file tags is first in the list, then return 0. Returns None is the wheel is not supported. """ if tags is None: # for mock tags = pep425tags.supported_tags indexes = [tags.index(c) for c in self.file_tags if c in tags] return min(indexes) if indexes else None def supported(self, tags=None): """Is this wheel supported on this system?""" if tags is None: # for mock tags = pep425tags.supported_tags return bool(set(tags).intersection(self.file_tags)) class WheelBuilder(object): """Build wheels from a RequirementSet.""" def __init__(self, requirement_set, finder, wheel_dir, build_options=[], global_options=[]): self.requirement_set = requirement_set self.finder = finder self.wheel_dir = normalize_path(wheel_dir) self.build_options = build_options self.global_options = global_options def _build_one(self, req): """Build one wheel.""" base_args = [ sys.executable, '-c', "import setuptools;__file__=%r;"\ "exec(compile(open(__file__).read().replace('\\r\\n', '\\n'), __file__, 'exec'))" % req.setup_py] + \ list(self.global_options) logger.notify('Running setup.py bdist_wheel for %s' % req.name) logger.notify('Destination directory: %s' % self.wheel_dir) wheel_args = base_args + ['bdist_wheel', '-d', self.wheel_dir] + self.build_options try: call_subprocess(wheel_args, cwd=req.source_dir, show_stdout=False) return True except: logger.error('Failed building wheel for %s' % req.name) return False def build(self): """Build wheels.""" #unpack and constructs req set self.requirement_set.prepare_files(self.finder) reqset = self.requirement_set.requirements.values() buildset = [req for req in reqset if not req.is_wheel] if not buildset: return #build the wheels logger.notify( 'Building wheels for collected packages: %s' % ','.join([req.name for req in buildset]) ) logger.indent += 2 build_success, build_failure = [], [] for req in buildset: if self._build_one(req): build_success.append(req) else: build_failure.append(req) logger.indent -= 2 #notify sucess/failure if build_success: logger.notify('Successfully built %s' % ' '.join([req.name for req in build_success])) if build_failure: logger.notify('Failed to build %s' % ' '.join([req.name for req in build_failure]))
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