/usr/lib/python3/dist-packages/Cython/Build/Dependencies.py is in cython3 0.25.2-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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import cython
from .. import __version__
import collections
import re, os, sys, time
from glob import iglob
try:
import gzip
gzip_open = gzip.open
gzip_ext = '.gz'
except ImportError:
gzip_open = open
gzip_ext = ''
import shutil
import subprocess
try:
import hashlib
except ImportError:
import md5 as hashlib
try:
from io import open as io_open
except ImportError:
from codecs import open as io_open
try:
from os.path import relpath as _relpath
except ImportError:
# Py<2.6
def _relpath(path, start=os.path.curdir):
if not path:
raise ValueError("no path specified")
start_list = os.path.abspath(start).split(os.path.sep)
path_list = os.path.abspath(path).split(os.path.sep)
i = len(os.path.commonprefix([start_list, path_list]))
rel_list = [os.path.pardir] * (len(start_list)-i) + path_list[i:]
if not rel_list:
return os.path.curdir
return os.path.join(*rel_list)
from distutils.extension import Extension
from .. import Utils
from ..Utils import (cached_function, cached_method, path_exists,
safe_makedirs, copy_file_to_dir_if_newer, is_package_dir)
from ..Compiler.Main import Context, CompilationOptions, default_options
join_path = cached_function(os.path.join)
copy_once_if_newer = cached_function(copy_file_to_dir_if_newer)
safe_makedirs_once = cached_function(safe_makedirs)
if sys.version_info[0] < 3:
# stupid Py2 distutils enforces str type in list of sources
_fs_encoding = sys.getfilesystemencoding()
if _fs_encoding is None:
_fs_encoding = sys.getdefaultencoding()
def encode_filename_in_py2(filename):
if not isinstance(filename, bytes):
return filename.encode(_fs_encoding)
return filename
else:
def encode_filename_in_py2(filename):
return filename
basestring = str
def extended_iglob(pattern):
if '{' in pattern:
m = re.match('(.*){([^}]+)}(.*)', pattern)
if m:
before, switch, after = m.groups()
for case in switch.split(','):
for path in extended_iglob(before + case + after):
yield path
return
if '**/' in pattern:
seen = set()
first, rest = pattern.split('**/', 1)
if first:
first = iglob(first+'/')
else:
first = ['']
for root in first:
for path in extended_iglob(join_path(root, rest)):
if path not in seen:
seen.add(path)
yield path
for path in extended_iglob(join_path(root, '*', '**/' + rest)):
if path not in seen:
seen.add(path)
yield path
else:
for path in iglob(pattern):
yield path
def nonempty(it, error_msg="expected non-empty iterator"):
empty = True
for value in it:
empty = False
yield value
if empty:
raise ValueError(error_msg)
@cached_function
def file_hash(filename):
path = os.path.normpath(filename.encode("UTF-8"))
m = hashlib.md5(str(len(path)) + ":")
m.update(path)
f = open(filename, 'rb')
try:
data = f.read(65000)
while data:
m.update(data)
data = f.read(65000)
finally:
f.close()
return m.hexdigest()
def parse_list(s):
"""
>>> parse_list("")
[]
>>> parse_list("a")
['a']
>>> parse_list("a b c")
['a', 'b', 'c']
>>> parse_list("[a, b, c]")
['a', 'b', 'c']
>>> parse_list('a " " b')
['a', ' ', 'b']
>>> parse_list('[a, ",a", "a,", ",", ]')
['a', ',a', 'a,', ',']
"""
if len(s) >= 2 and s[0] == '[' and s[-1] == ']':
s = s[1:-1]
delimiter = ','
else:
delimiter = ' '
s, literals = strip_string_literals(s)
def unquote(literal):
literal = literal.strip()
if literal[0] in "'\"":
return literals[literal[1:-1]]
else:
return literal
return [unquote(item) for item in s.split(delimiter) if item.strip()]
transitive_str = object()
transitive_list = object()
distutils_settings = {
'name': str,
'sources': list,
'define_macros': list,
'undef_macros': list,
'libraries': transitive_list,
'library_dirs': transitive_list,
'runtime_library_dirs': transitive_list,
'include_dirs': transitive_list,
'extra_objects': list,
'extra_compile_args': transitive_list,
'extra_link_args': transitive_list,
'export_symbols': list,
'depends': transitive_list,
'language': transitive_str,
}
@cython.locals(start=cython.Py_ssize_t, end=cython.Py_ssize_t)
def line_iter(source):
if isinstance(source, basestring):
start = 0
while True:
end = source.find('\n', start)
if end == -1:
yield source[start:]
return
yield source[start:end]
start = end+1
else:
for line in source:
yield line
class DistutilsInfo(object):
def __init__(self, source=None, exn=None):
self.values = {}
if source is not None:
for line in line_iter(source):
line = line.lstrip()
if not line:
continue
if line[0] != '#':
break
line = line[1:].lstrip()
if line[:10] == 'distutils:':
key, _, value = [s.strip() for s in line[10:].partition('=')]
type = distutils_settings[key]
if type in (list, transitive_list):
value = parse_list(value)
if key == 'define_macros':
value = [tuple(macro.split('=', 1))
if '=' in macro else (macro, None)
for macro in value]
self.values[key] = value
elif exn is not None:
for key in distutils_settings:
if key in ('name', 'sources'):
continue
value = getattr(exn, key, None)
if value:
self.values[key] = value
def merge(self, other):
if other is None:
return self
for key, value in other.values.items():
type = distutils_settings[key]
if type is transitive_str and key not in self.values:
self.values[key] = value
elif type is transitive_list:
if key in self.values:
# Change a *copy* of the list (Trac #845)
all = self.values[key][:]
for v in value:
if v not in all:
all.append(v)
value = all
self.values[key] = value
return self
def subs(self, aliases):
if aliases is None:
return self
resolved = DistutilsInfo()
for key, value in self.values.items():
type = distutils_settings[key]
if type in [list, transitive_list]:
new_value_list = []
for v in value:
if v in aliases:
v = aliases[v]
if isinstance(v, list):
new_value_list += v
else:
new_value_list.append(v)
value = new_value_list
else:
if value in aliases:
value = aliases[value]
resolved.values[key] = value
return resolved
def apply(self, extension):
for key, value in self.values.items():
type = distutils_settings[key]
if type in [list, transitive_list]:
value = getattr(extension, key) + list(value)
setattr(extension, key, value)
@cython.locals(start=cython.Py_ssize_t, q=cython.Py_ssize_t,
single_q=cython.Py_ssize_t, double_q=cython.Py_ssize_t,
hash_mark=cython.Py_ssize_t, end=cython.Py_ssize_t,
k=cython.Py_ssize_t, counter=cython.Py_ssize_t, quote_len=cython.Py_ssize_t)
def strip_string_literals(code, prefix='__Pyx_L'):
"""
Normalizes every string literal to be of the form '__Pyx_Lxxx',
returning the normalized code and a mapping of labels to
string literals.
"""
new_code = []
literals = {}
counter = 0
start = q = 0
in_quote = False
hash_mark = single_q = double_q = -1
code_len = len(code)
quote_type = quote_len = None
while True:
if hash_mark < q:
hash_mark = code.find('#', q)
if single_q < q:
single_q = code.find("'", q)
if double_q < q:
double_q = code.find('"', q)
q = min(single_q, double_q)
if q == -1:
q = max(single_q, double_q)
# We're done.
if q == -1 and hash_mark == -1:
new_code.append(code[start:])
break
# Try to close the quote.
elif in_quote:
if code[q-1] == u'\\':
k = 2
while q >= k and code[q-k] == u'\\':
k += 1
if k % 2 == 0:
q += 1
continue
if code[q] == quote_type and (
quote_len == 1 or (code_len > q + 2 and quote_type == code[q+1] == code[q+2])):
counter += 1
label = "%s%s_" % (prefix, counter)
literals[label] = code[start+quote_len:q]
full_quote = code[q:q+quote_len]
new_code.append(full_quote)
new_code.append(label)
new_code.append(full_quote)
q += quote_len
in_quote = False
start = q
else:
q += 1
# Process comment.
elif -1 != hash_mark and (hash_mark < q or q == -1):
new_code.append(code[start:hash_mark+1])
end = code.find('\n', hash_mark)
counter += 1
label = "%s%s_" % (prefix, counter)
if end == -1:
end_or_none = None
else:
end_or_none = end
literals[label] = code[hash_mark+1:end_or_none]
new_code.append(label)
if end == -1:
break
start = q = end
# Open the quote.
else:
if code_len >= q+3 and (code[q] == code[q+1] == code[q+2]):
quote_len = 3
else:
quote_len = 1
in_quote = True
quote_type = code[q]
new_code.append(code[start:q])
start = q
q += quote_len
return "".join(new_code), literals
# We need to allow spaces to allow for conditional compilation like
# IF ...:
# cimport ...
dependency_regex = re.compile(r"(?:^\s*from +([0-9a-zA-Z_.]+) +cimport)|"
r"(?:^\s*cimport +([0-9a-zA-Z_.]+(?: *, *[0-9a-zA-Z_.]+)*))|"
r"(?:^\s*cdef +extern +from +['\"]([^'\"]+)['\"])|"
r"(?:^\s*include +['\"]([^'\"]+)['\"])", re.M)
def normalize_existing(base_path, rel_paths):
return normalize_existing0(os.path.dirname(base_path), tuple(set(rel_paths)))
@cached_function
def normalize_existing0(base_dir, rel_paths):
normalized = []
for rel in rel_paths:
path = join_path(base_dir, rel)
if path_exists(path):
normalized.append(os.path.normpath(path))
else:
normalized.append(rel)
return normalized
def resolve_depends(depends, include_dirs):
include_dirs = tuple(include_dirs)
resolved = []
for depend in depends:
path = resolve_depend(depend, include_dirs)
if path is not None:
resolved.append(path)
return resolved
@cached_function
def resolve_depend(depend, include_dirs):
if depend[0] == '<' and depend[-1] == '>':
return None
for dir in include_dirs:
path = join_path(dir, depend)
if path_exists(path):
return os.path.normpath(path)
return None
@cached_function
def package(filename):
dir = os.path.dirname(os.path.abspath(str(filename)))
if dir != filename and is_package_dir(dir):
return package(dir) + (os.path.basename(dir),)
else:
return ()
@cached_function
def fully_qualified_name(filename):
module = os.path.splitext(os.path.basename(filename))[0]
return '.'.join(package(filename) + (module,))
@cached_function
def parse_dependencies(source_filename):
# Actual parsing is way too slow, so we use regular expressions.
# The only catch is that we must strip comments and string
# literals ahead of time.
fh = Utils.open_source_file(source_filename, error_handling='ignore')
try:
source = fh.read()
finally:
fh.close()
distutils_info = DistutilsInfo(source)
source, literals = strip_string_literals(source)
source = source.replace('\\\n', ' ').replace('\t', ' ')
# TODO: pure mode
cimports = []
includes = []
externs = []
for m in dependency_regex.finditer(source):
cimport_from, cimport_list, extern, include = m.groups()
if cimport_from:
cimports.append(cimport_from)
elif cimport_list:
cimports.extend(x.strip() for x in cimport_list.split(","))
elif extern:
externs.append(literals[extern])
else:
includes.append(literals[include])
return cimports, includes, externs, distutils_info
class DependencyTree(object):
def __init__(self, context, quiet=False):
self.context = context
self.quiet = quiet
self._transitive_cache = {}
def parse_dependencies(self, source_filename):
if path_exists(source_filename):
source_filename = os.path.normpath(source_filename)
return parse_dependencies(source_filename)
@cached_method
def included_files(self, filename):
# This is messy because included files are textually included, resolving
# cimports (but not includes) relative to the including file.
all = set()
for include in self.parse_dependencies(filename)[1]:
include_path = join_path(os.path.dirname(filename), include)
if not path_exists(include_path):
include_path = self.context.find_include_file(include, None)
if include_path:
if '.' + os.path.sep in include_path:
include_path = os.path.normpath(include_path)
all.add(include_path)
all.update(self.included_files(include_path))
elif not self.quiet:
print("Unable to locate '%s' referenced from '%s'" % (filename, include))
return all
@cached_method
def cimports_and_externs(self, filename):
# This is really ugly. Nested cimports are resolved with respect to the
# includer, but includes are resolved with respect to the includee.
cimports, includes, externs = self.parse_dependencies(filename)[:3]
cimports = set(cimports)
externs = set(externs)
for include in self.included_files(filename):
included_cimports, included_externs = self.cimports_and_externs(include)
cimports.update(included_cimports)
externs.update(included_externs)
return tuple(cimports), normalize_existing(filename, externs)
def cimports(self, filename):
return self.cimports_and_externs(filename)[0]
def package(self, filename):
return package(filename)
def fully_qualified_name(self, filename):
return fully_qualified_name(filename)
@cached_method
def find_pxd(self, module, filename=None):
is_relative = module[0] == '.'
if is_relative and not filename:
raise NotImplementedError("New relative imports.")
if filename is not None:
module_path = module.split('.')
if is_relative:
module_path.pop(0) # just explicitly relative
package_path = list(self.package(filename))
while module_path and not module_path[0]:
try:
package_path.pop()
except IndexError:
return None # FIXME: error?
module_path.pop(0)
relative = '.'.join(package_path + module_path)
pxd = self.context.find_pxd_file(relative, None)
if pxd:
return pxd
if is_relative:
return None # FIXME: error?
return self.context.find_pxd_file(module, None)
@cached_method
def cimported_files(self, filename):
if filename[-4:] == '.pyx' and path_exists(filename[:-4] + '.pxd'):
pxd_list = [filename[:-4] + '.pxd']
else:
pxd_list = []
for module in self.cimports(filename):
if module[:7] == 'cython.' or module == 'cython':
continue
pxd_file = self.find_pxd(module, filename)
if pxd_file is not None:
pxd_list.append(pxd_file)
elif not self.quiet:
print("%s: cannot find cimported module '%s'" % (filename, module))
return tuple(pxd_list)
@cached_method
def immediate_dependencies(self, filename):
all = set([filename])
all.update(self.cimported_files(filename))
all.update(self.included_files(filename))
return all
def all_dependencies(self, filename):
return self.transitive_merge(filename, self.immediate_dependencies, set.union)
@cached_method
def timestamp(self, filename):
return os.path.getmtime(filename)
def extract_timestamp(self, filename):
return self.timestamp(filename), filename
def newest_dependency(self, filename):
return max([self.extract_timestamp(f) for f in self.all_dependencies(filename)])
def transitive_fingerprint(self, filename, extra=None):
try:
m = hashlib.md5(__version__)
m.update(file_hash(filename))
for x in sorted(self.all_dependencies(filename)):
if os.path.splitext(x)[1] not in ('.c', '.cpp', '.h'):
m.update(file_hash(x))
if extra is not None:
m.update(str(extra))
return m.hexdigest()
except IOError:
return None
def distutils_info0(self, filename):
info = self.parse_dependencies(filename)[3]
externs = self.cimports_and_externs(filename)[1]
if externs:
if 'depends' in info.values:
info.values['depends'] = list(set(info.values['depends']).union(externs))
else:
info.values['depends'] = list(externs)
return info
def distutils_info(self, filename, aliases=None, base=None):
return (self.transitive_merge(filename, self.distutils_info0, DistutilsInfo.merge)
.subs(aliases)
.merge(base))
def transitive_merge(self, node, extract, merge):
try:
seen = self._transitive_cache[extract, merge]
except KeyError:
seen = self._transitive_cache[extract, merge] = {}
return self.transitive_merge_helper(
node, extract, merge, seen, {}, self.cimported_files)[0]
def transitive_merge_helper(self, node, extract, merge, seen, stack, outgoing):
if node in seen:
return seen[node], None
deps = extract(node)
if node in stack:
return deps, node
try:
stack[node] = len(stack)
loop = None
for next in outgoing(node):
sub_deps, sub_loop = self.transitive_merge_helper(next, extract, merge, seen, stack, outgoing)
if sub_loop is not None:
if loop is not None and stack[loop] < stack[sub_loop]:
pass
else:
loop = sub_loop
deps = merge(deps, sub_deps)
if loop == node:
loop = None
if loop is None:
seen[node] = deps
return deps, loop
finally:
del stack[node]
_dep_tree = None
def create_dependency_tree(ctx=None, quiet=False):
global _dep_tree
if _dep_tree is None:
if ctx is None:
ctx = Context(["."], CompilationOptions(default_options))
_dep_tree = DependencyTree(ctx, quiet=quiet)
return _dep_tree
# This may be useful for advanced users?
def create_extension_list(patterns, exclude=None, ctx=None, aliases=None, quiet=False, language=None,
exclude_failures=False):
if language is not None:
print('Please put "# distutils: language=%s" in your .pyx or .pxd file(s)' % language)
if exclude is None:
exclude = []
if patterns is None:
return [], {}
elif isinstance(patterns, basestring) or not isinstance(patterns, collections.Iterable):
patterns = [patterns]
explicit_modules = set([m.name for m in patterns if isinstance(m, Extension)])
seen = set()
deps = create_dependency_tree(ctx, quiet=quiet)
to_exclude = set()
if not isinstance(exclude, list):
exclude = [exclude]
for pattern in exclude:
to_exclude.update(map(os.path.abspath, extended_iglob(pattern)))
module_list = []
module_metadata = {}
# workaround for setuptools
if 'setuptools' in sys.modules:
Extension_distutils = sys.modules['setuptools.extension']._Extension
Extension_setuptools = sys.modules['setuptools'].Extension
else:
# dummy class, in case we do not have setuptools
Extension_distutils = Extension
class Extension_setuptools(Extension): pass
for pattern in patterns:
if isinstance(pattern, str):
filepattern = pattern
template = None
name = '*'
base = None
exn_type = Extension
ext_language = language
elif isinstance(pattern, (Extension_distutils, Extension_setuptools)):
cython_sources = [s for s in pattern.sources
if os.path.splitext(s)[1] in ('.py', '.pyx')]
if cython_sources:
filepattern = cython_sources[0]
if len(cython_sources) > 1:
print("Warning: Multiple cython sources found for extension '%s': %s\n"
"See http://cython.readthedocs.io/en/latest/src/userguide/sharing_declarations.html "
"for sharing declarations among Cython files." % (pattern.name, cython_sources))
else:
# ignore non-cython modules
module_list.append(pattern)
continue
template = pattern
name = template.name
base = DistutilsInfo(exn=template)
exn_type = template.__class__
ext_language = None # do not override whatever the Extension says
else:
msg = str("pattern is not of type str nor subclass of Extension (%s)"
" but of type %s and class %s" % (repr(Extension),
type(pattern),
pattern.__class__))
raise TypeError(msg)
for file in nonempty(sorted(extended_iglob(filepattern)), "'%s' doesn't match any files" % filepattern):
if os.path.abspath(file) in to_exclude:
continue
pkg = deps.package(file)
module_name = deps.fully_qualified_name(file)
if '*' in name:
if module_name in explicit_modules:
continue
elif name != module_name:
print("Warning: Extension name '%s' does not match fully qualified name '%s' of '%s'" % (
name, module_name, file))
module_name = name
if module_name not in seen:
try:
kwds = deps.distutils_info(file, aliases, base).values
except Exception:
if exclude_failures:
continue
raise
if base is not None:
for key, value in base.values.items():
if key not in kwds:
kwds[key] = value
sources = [file]
if template is not None:
sources += [m for m in template.sources if m != filepattern]
if 'sources' in kwds:
# allow users to add .c files etc.
for source in kwds['sources']:
source = encode_filename_in_py2(source)
if source not in sources:
sources.append(source)
extra_sources = kwds['sources']
del kwds['sources']
else:
extra_sources = None
if 'depends' in kwds:
depends = resolve_depends(kwds['depends'], (kwds.get('include_dirs') or []) + ["."])
if template is not None:
# Always include everything from the template.
depends = set(template.depends).union(depends)
# Sort depends to make the metadata dump in the
# Cython-generated C code predictable.
kwds['depends'] = sorted(depends)
if ext_language and 'language' not in kwds:
kwds['language'] = ext_language
module_list.append(exn_type(
name=module_name,
sources=sources,
**kwds))
if extra_sources:
kwds['sources'] = extra_sources
module_metadata[module_name] = {'distutils': kwds, 'module_name': module_name}
m = module_list[-1]
if file not in m.sources:
# Old setuptools unconditionally replaces .pyx with .c
m.sources.remove(file.rsplit('.')[0] + '.c')
m.sources.insert(0, file)
seen.add(name)
return module_list, module_metadata
# This is the user-exposed entry point.
def cythonize(module_list, exclude=None, nthreads=0, aliases=None, quiet=False, force=False, language=None,
exclude_failures=False, **options):
"""
Compile a set of source modules into C/C++ files and return a list of distutils
Extension objects for them.
As module list, pass either a glob pattern, a list of glob patterns or a list of
Extension objects. The latter allows you to configure the extensions separately
through the normal distutils options.
When using glob patterns, you can exclude certain module names explicitly
by passing them into the 'exclude' option.
To globally enable C++ mode, you can pass language='c++'. Otherwise, this
will be determined at a per-file level based on compiler directives. This
affects only modules found based on file names. Extension instances passed
into cythonize() will not be changed.
For parallel compilation, set the 'nthreads' option to the number of
concurrent builds.
For a broad 'try to compile' mode that ignores compilation failures and
simply excludes the failed extensions, pass 'exclude_failures=True'. Note
that this only really makes sense for compiling .py files which can also
be used without compilation.
Additional compilation options can be passed as keyword arguments.
"""
if exclude is None:
exclude = []
if 'include_path' not in options:
options['include_path'] = ['.']
if 'common_utility_include_dir' in options:
if options.get('cache'):
raise NotImplementedError("common_utility_include_dir does not yet work with caching")
safe_makedirs(options['common_utility_include_dir'])
c_options = CompilationOptions(**options)
cpp_options = CompilationOptions(**options); cpp_options.cplus = True
ctx = c_options.create_context()
options = c_options
module_list, module_metadata = create_extension_list(
module_list,
exclude=exclude,
ctx=ctx,
quiet=quiet,
exclude_failures=exclude_failures,
language=language,
aliases=aliases)
deps = create_dependency_tree(ctx, quiet=quiet)
build_dir = getattr(options, 'build_dir', None)
modules_by_cfile = {}
to_compile = []
for m in module_list:
if build_dir:
root = os.getcwd() # distutil extension depends are relative to cwd
def copy_to_build_dir(filepath, root=root):
filepath_abs = os.path.abspath(filepath)
if os.path.isabs(filepath):
filepath = filepath_abs
if filepath_abs.startswith(root):
mod_dir = join_path(build_dir,
os.path.dirname(_relpath(filepath, root)))
copy_once_if_newer(filepath_abs, mod_dir)
for dep in m.depends:
copy_to_build_dir(dep)
new_sources = []
for source in m.sources:
base, ext = os.path.splitext(source)
if ext in ('.pyx', '.py'):
if m.language == 'c++':
c_file = base + '.cpp'
options = cpp_options
else:
c_file = base + '.c'
options = c_options
# setup for out of place build directory if enabled
if build_dir:
c_file = os.path.join(build_dir, c_file)
dir = os.path.dirname(c_file)
safe_makedirs_once(dir)
if os.path.exists(c_file):
c_timestamp = os.path.getmtime(c_file)
else:
c_timestamp = -1
# Priority goes first to modified files, second to direct
# dependents, and finally to indirect dependents.
if c_timestamp < deps.timestamp(source):
dep_timestamp, dep = deps.timestamp(source), source
priority = 0
else:
dep_timestamp, dep = deps.newest_dependency(source)
priority = 2 - (dep in deps.immediate_dependencies(source))
if force or c_timestamp < dep_timestamp:
if not quiet:
if source == dep:
print("Compiling %s because it changed." % source)
else:
print("Compiling %s because it depends on %s." % (source, dep))
if not force and options.cache:
extra = m.language
fingerprint = deps.transitive_fingerprint(source, extra)
else:
fingerprint = None
to_compile.append((priority, source, c_file, fingerprint, quiet,
options, not exclude_failures, module_metadata.get(m.name)))
new_sources.append(c_file)
if c_file not in modules_by_cfile:
modules_by_cfile[c_file] = [m]
else:
modules_by_cfile[c_file].append(m)
else:
new_sources.append(source)
if build_dir:
copy_to_build_dir(source)
m.sources = new_sources
if options.cache:
if not os.path.exists(options.cache):
os.makedirs(options.cache)
to_compile.sort()
# Drop "priority" component of "to_compile" entries and add a
# simple progress indicator.
N = len(to_compile)
progress_fmt = "[{0:%d}/{1}] " % len(str(N))
for i in range(N):
progress = progress_fmt.format(i+1, N)
to_compile[i] = to_compile[i][1:] + (progress,)
if N <= 1:
nthreads = 0
if nthreads:
# Requires multiprocessing (or Python >= 2.6)
try:
import multiprocessing
pool = multiprocessing.Pool(
nthreads, initializer=_init_multiprocessing_helper)
except (ImportError, OSError):
print("multiprocessing required for parallel cythonization")
nthreads = 0
else:
# This is a bit more involved than it should be, because KeyboardInterrupts
# break the multiprocessing workers when using a normal pool.map().
# See, for example:
# http://noswap.com/blog/python-multiprocessing-keyboardinterrupt
try:
result = pool.map_async(cythonize_one_helper, to_compile, chunksize=1)
pool.close()
while not result.ready():
try:
result.get(99999) # seconds
except multiprocessing.TimeoutError:
pass
except KeyboardInterrupt:
pool.terminate()
raise
pool.join()
if not nthreads:
for args in to_compile:
cythonize_one(*args)
if exclude_failures:
failed_modules = set()
for c_file, modules in modules_by_cfile.items():
if not os.path.exists(c_file):
failed_modules.update(modules)
elif os.path.getsize(c_file) < 200:
f = io_open(c_file, 'r', encoding='iso8859-1')
try:
if f.read(len('#error ')) == '#error ':
# dead compilation result
failed_modules.update(modules)
finally:
f.close()
if failed_modules:
for module in failed_modules:
module_list.remove(module)
print("Failed compilations: %s" % ', '.join(sorted([
module.name for module in failed_modules])))
if options.cache:
cleanup_cache(options.cache, getattr(options, 'cache_size', 1024 * 1024 * 100))
# cythonize() is often followed by the (non-Python-buffered)
# compiler output, flush now to avoid interleaving output.
sys.stdout.flush()
return module_list
if os.environ.get('XML_RESULTS'):
compile_result_dir = os.environ['XML_RESULTS']
def record_results(func):
def with_record(*args):
t = time.time()
success = True
try:
try:
func(*args)
except:
success = False
finally:
t = time.time() - t
module = fully_qualified_name(args[0])
name = "cythonize." + module
failures = 1 - success
if success:
failure_item = ""
else:
failure_item = "failure"
output = open(os.path.join(compile_result_dir, name + ".xml"), "w")
output.write("""
<?xml version="1.0" ?>
<testsuite name="%(name)s" errors="0" failures="%(failures)s" tests="1" time="%(t)s">
<testcase classname="%(name)s" name="cythonize">
%(failure_item)s
</testcase>
</testsuite>
""".strip() % locals())
output.close()
return with_record
else:
def record_results(func):
return func
# TODO: Share context? Issue: pyx processing leaks into pxd module
@record_results
def cythonize_one(pyx_file, c_file, fingerprint, quiet, options=None, raise_on_failure=True, embedded_metadata=None, progress=""):
from ..Compiler.Main import compile, default_options
from ..Compiler.Errors import CompileError, PyrexError
if fingerprint:
if not os.path.exists(options.cache):
try:
os.mkdir(options.cache)
except:
if not os.path.exists(options.cache):
raise
# Cython-generated c files are highly compressible.
# (E.g. a compression ratio of about 10 for Sage).
fingerprint_file = join_path(
options.cache, "%s-%s%s" % (os.path.basename(c_file), fingerprint, gzip_ext))
if os.path.exists(fingerprint_file):
if not quiet:
print("%sFound compiled %s in cache" % (progress, pyx_file))
os.utime(fingerprint_file, None)
g = gzip_open(fingerprint_file, 'rb')
try:
f = open(c_file, 'wb')
try:
shutil.copyfileobj(g, f)
finally:
f.close()
finally:
g.close()
return
if not quiet:
print("%sCythonizing %s" % (progress, pyx_file))
if options is None:
options = CompilationOptions(default_options)
options.output_file = c_file
options.embedded_metadata = embedded_metadata
any_failures = 0
try:
result = compile([pyx_file], options)
if result.num_errors > 0:
any_failures = 1
except (EnvironmentError, PyrexError) as e:
sys.stderr.write('%s\n' % e)
any_failures = 1
# XXX
import traceback
traceback.print_exc()
except Exception:
if raise_on_failure:
raise
import traceback
traceback.print_exc()
any_failures = 1
if any_failures:
if raise_on_failure:
raise CompileError(None, pyx_file)
elif os.path.exists(c_file):
os.remove(c_file)
elif fingerprint:
f = open(c_file, 'rb')
try:
g = gzip_open(fingerprint_file, 'wb')
try:
shutil.copyfileobj(f, g)
finally:
g.close()
finally:
f.close()
def cythonize_one_helper(m):
import traceback
try:
return cythonize_one(*m)
except Exception:
traceback.print_exc()
raise
def _init_multiprocessing_helper():
# KeyboardInterrupt kills workers, so don't let them get it
import signal
signal.signal(signal.SIGINT, signal.SIG_IGN)
def cleanup_cache(cache, target_size, ratio=.85):
try:
p = subprocess.Popen(['du', '-s', '-k', os.path.abspath(cache)], stdout=subprocess.PIPE)
res = p.wait()
if res == 0:
total_size = 1024 * int(p.stdout.read().strip().split()[0])
if total_size < target_size:
return
except (OSError, ValueError):
pass
total_size = 0
all = []
for file in os.listdir(cache):
path = join_path(cache, file)
s = os.stat(path)
total_size += s.st_size
all.append((s.st_atime, s.st_size, path))
if total_size > target_size:
for time, size, file in reversed(sorted(all)):
os.unlink(file)
total_size -= size
if total_size < target_size * ratio:
break
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