Use the same list of potential package init file names everywhere (not just...

Use the same list of potential package init file names everywhere (not just "__init__.py" but also .pxd and .pyx).
Closes #2665.

Cython/Build/Cythonize.py

@@ -69,7 +69,7 @@ def parse_compile_time_env(option, name, value, parser):
 
 def find_package_base(path):
     base_dir, package_path = os.path.split(path)
-    while os.path.isfile(os.path.join(base_dir, '__init__.py')):
+    while is_package_dir(base_dir):
         base_dir, parent = os.path.split(base_dir)
         package_path = '%s/%s' % (parent, package_path)
     return base_dir, package_path

Cython/Compiler/Main.py

@@ -219,7 +219,7 @@ class Context(object):
                     # look for the non-existing pxd file next time.
                     scope.pxd_file_loaded = True
                     package_pathname = self.search_include_directories(qualified_name, ".py", pos)
-                    if package_pathname and package_pathname.endswith('__init__.py'):
+                    if package_pathname and package_pathname.endswith(Utils.PACKAGE_FILES):
                         pass
                     else:
                         error(pos, "'%s.pxd' not found" % qualified_name.replace('.', os.sep))

Cython/Utils.py

@@ -23,6 +23,8 @@ import codecs
 import shutil
 from contextlib import contextmanager
 
+PACKAGE_FILES = ("__init__.py", "__init__.pyc", "__init__.pyx", "__init__.pxd")
+
 modification_time = os.path.getmtime
 
 _function_caches = []
@@ -191,10 +193,7 @@ def check_package_dir(dir, package_names):
 
 @cached_function
 def is_package_dir(dir_path):
-    for filename in ("__init__.py",
-                     "__init__.pyc",
-                     "__init__.pyx",
-                     "__init__.pxd"):
+    for filename in PACKAGE_FILES:
         path = os.path.join(dir_path, filename)
         if path_exists(path):
             return 1

runtests.py

@@ -419,11 +419,12 @@ VER_DEP_MODULES = {
     # to be unsafe...
     (2,999): (operator.lt, lambda x: x in ['run.special_methods_T561_py3',
                                            'run.test_raisefrom',
+                                           'run.different_package_names',
                                            ]),
     (3,): (operator.ge, lambda x: x in ['run.non_future_division',
                                         'compile.extsetslice',
                                         'compile.extdelslice',
-                                        'run.special_methods_T561_py2'
+                                        'run.special_methods_T561_py2',
                                         ]),
     (3,3) : (operator.lt, lambda x: x in ['build.package_compilation',
                                           'run.yield_from_py33',

tests/run/different_package_names.srctree

+# mode: run
+# tag: import,cimport,packages
+
+PYTHON setup.py build_ext --inplace
+PYTHON -c "import pkg_py"
+PYTHON -c "import pkg_py.pkg_pyx"
+PYTHON -c "import pkg_py.pkg_pyx.module as module; module.run_test()"
+
+######## setup.py ########
+
+from distutils.core import setup
+from Cython.Build import cythonize
+
+setup(
+    ext_modules=cythonize('**/*.pyx', language_level=3),
+)
+
+
+######## pkg_py/__init__.py ########
+
+TYPE = 'py'
+
+######## pkg_py/pkg_pyx/__init__.pyx ########
+
+TYPE = 'pyx'
+
+######## pkg_py/pkg_pyx/pkg_pxd/__init__.pxd ########
+
+# Not what Python would consider a package, but Cython can use it for cimports.
+from libc.math cimport fabs
+
+######## pkg_py/pkg_pyx/module.pyx ########
+
+from pkg_py.pkg_pyx.pkg_pxd cimport fabs
+
+def run_test():
+    import pkg_py
+    assert pkg_py.TYPE == 'py'
+
+    import pkg_py.pkg_pyx
+    assert pkg_py.pkg_pyx.TYPE == 'pyx'
+
+    assert fabs(-2.0) == 2.0