Adding cython v0.20.2 in third-party.

third_party/cython/src/Tools/cystdlib.py

Index: third_party/cython/src/Tools/cystdlib.py
diff --git a/third_party/cython/src/Tools/cystdlib.py b/third_party/cython/src/Tools/cystdlib.py
new file mode 100644
index 0000000000000000000000000000000000000000..8e16eae78bce10029f11e5f1fabefc300d027e8e
--- /dev/null
+++ b/third_party/cython/src/Tools/cystdlib.py
@@ -0,0 +1,187 @@
+"""
+Highly experimental script that compiles the CPython standard library using Cython.
+
+Execute the script either in the CPython 'Lib' directory or pass the
+option '--current-python' to compile the standard library of the running
+Python interpreter.
+
+Pass '-j N' to get a parallel build with N processes.
+
+Usage example::
+
+    $ python cystdlib.py --current-python build_ext -i
+"""
+
+import os
+import sys
+from distutils.core import setup
+from Cython.Build import cythonize
+from Cython.Compiler import Options
+
+# improve Python compatibility by allowing some broken code
+Options.error_on_unknown_names = False
+Options.error_on_uninitialized = False
+
+exclude_patterns = ['**/test/**/*.py', '**/tests/**/*.py', '**/__init__.py']
+broken = [
+    'idlelib/MultiCall.py',
+    'email/utils.py',
+    'multiprocessing/reduction.py',
+    'multiprocessing/util.py',
+    'threading.py',      # interrupt handling
+    'lib2to3/fixes/fix_sys_exc.py',
+    'traceback.py',
+    'types.py',
+    'enum.py',
+    'importlib/_bootstrap',
+]
+
+default_directives = dict(
+    auto_cpdef=False,   # enable when it's safe, see long list of failures below
+    binding=True,
+    set_initial_path='SOURCEFILE')
+default_directives['optimize.inline_defnode_calls'] = True
+
+special_directives = [
+    (['pkgutil.py',
+      'decimal.py',
+      'datetime.py',
+      'optparse.py',
+      'sndhdr.py',
+      'opcode.py',
+      'ntpath.py',
+      'urllib/request.py',
+      'plat-*/TYPES.py',
+      'plat-*/IN.py',
+      'tkinter/_fix.py',
+      'lib2to3/refactor.py',
+      'webbrowser.py',
+      'shutil.py',
+      'multiprocessing/forking.py',
+      'xml/sax/expatreader.py',
+      'xmlrpc/client.py',
+      'pydoc.py',
+      'xml/etree/ElementTree.py',
+      'posixpath.py',
+      'inspect.py',
+      'ctypes/util.py',
+      'urllib/parse.py',
+      'warnings.py',
+      'tempfile.py',
+      'trace.py',
+      'heapq.py',
+      'pickletools.py',
+      'multiprocessing/connection.py',
+      'hashlib.py',
+      'getopt.py',
+      'os.py',
+      'types.py',
+     ], dict(auto_cpdef=False)),
+]
+del special_directives[:]  # currently unused
+
+def build_extensions(includes='**/*.py',
+                     excludes=None,
+                     special_directives=special_directives,
+                     language_level=sys.version_info[0],
+                     parallel=None):
+    if isinstance(includes, str):
+        includes = [includes]
+    excludes = list(excludes or exclude_patterns) + broken
+
+    all_groups = (special_directives or []) + [(includes, {})]
+    extensions = []
+    for modules, directives in all_groups:
+        exclude_now = excludes[:]
+        for other_modules, _ in special_directives:
+            if other_modules != modules:
+                exclude_now.extend(other_modules)
+
+        d = dict(default_directives)
+        d.update(directives)
+
+        extensions.extend(
+            cythonize(
+                modules,
+                exclude=exclude_now,
+                exclude_failures=True,
+                language_level=language_level,
+                compiler_directives=d,
+                nthreads=parallel,
+            ))
+    return extensions
+
+
+def build(extensions):
+    try:
+        setup(ext_modules=extensions)
+        result = True
+    except:
+        import traceback
+        print('error building extensions %s' % (
+            [ext.name for ext in extensions],))
+        traceback.print_exc()
+        result = False
+    return extensions, result
+
+
+def _build(args):
+    sys_args, ext = args
+    sys.argv[1:] = sys_args
+    return build([ext])
+
+
+def parse_args():
+    from optparse import OptionParser
+    parser = OptionParser('%prog [options] [LIB_DIR (default: ./Lib)]')
+    parser.add_option(
+        '--current-python', dest='current_python', action='store_true',
+        help='compile the stdlib of the running Python')
+    parser.add_option(
+        '-j', '--jobs', dest='parallel_jobs', metavar='N',
+        type=int, default=1,
+        help='run builds in N parallel jobs (default: 1)')
+    parser.add_option(
+        '-x', '--exclude', dest='excludes', metavar='PATTERN',
+        action="append", help='exclude modules/packages matching PATTERN')
+    options, args = parser.parse_args()
+    if not args:
+        args = ['./Lib']
+    elif len(args) > 1:
+        parser.error('only one argument expected, got %d' % len(args))
+    return options, args
+
+
+if __name__ == '__main__':
+    options, args = parse_args()
+    if options.current_python:
+        # assume that the stdlib is where the "os" module lives
+        os.chdir(os.path.dirname(os.__file__))
+    else:
+        os.chdir(args[0])
+
+    pool = None
+    parallel_jobs = options.parallel_jobs
+    if options.parallel_jobs:
+        try:
+            import multiprocessing
+            pool = multiprocessing.Pool(parallel_jobs)
+            print("Building in %d parallel processes" % parallel_jobs)
+        except (ImportError, OSError):
+            print("Not building in parallel")
+            parallel_jobs = 0
+
+    extensions = build_extensions(
+        parallel=parallel_jobs,
+        excludes=options.excludes)
+    sys_args = ['build_ext', '-i']
+    if pool is not None:
+        results = pool.map(_build, [(sys_args, ext) for ext in extensions])
+        pool.close()
+        pool.join()
+        for ext, result in results:
+            if not result:
+                print("building extension %s failed" % (ext[0].name,))
+    else:
+        sys.argv[1:] = sys_args
+        build(extensions)