Replaced pep425tags with packaging (#346)

The internal pep425tags module has been removed in favor of the "packaging" library.

setup.cfg

@@ -34,6 +34,7 @@ package_dir=
 packages = find:
 python_requires = >=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*
 setup_requires = setuptools >= 40.9.0
+install_requires = packaging >= 20.2
 zip_safe = False
 
 [options.packages.find]

src/wheel/bdist_wheel.py

@@ -4,28 +4,29 @@
 A wheel is a built archive format.
 """
 
+import distutils
 import os
 import shutil
 import stat
 import sys
 import re
+import warnings
 from collections import OrderedDict
 from email.generator import Generator
 from distutils.core import Command
-from distutils.sysconfig import get_python_version
+from distutils.sysconfig import get_config_var
 from distutils import log as logger
 from glob import iglob
 from shutil import rmtree
-from warnings import warn
 from zipfile import ZIP_DEFLATED, ZIP_STORED
 
+from packaging import tags
 import pkg_resources
 
-from .pep425tags import get_abbr_impl, get_impl_ver, get_abi_tag, get_platform
 from .pkginfo import write_pkg_info
+from .macosx_libfile import calculate_macosx_platform_tag
 from .metadata import pkginfo_to_metadata
 from .wheelfile import WheelFile
-from . import pep425tags
 from . import __version__ as wheel_version
 
 
@@ -35,6 +36,70 @@
 PY_LIMITED_API_PATTERN = r'cp3\d'
 
 
+def python_tag():
+    return 'py{}'.format(sys.version_info[0])
+
+
+def get_platform(archive_root):
+    """Return our platform name 'win32', 'linux_x86_64'"""
+    # XXX remove distutils dependency
+    result = distutils.util.get_platform()
+    if result.startswith("macosx") and archive_root is not None:
+        result = calculate_macosx_platform_tag(archive_root, result)
+    if result == "linux_x86_64" and sys.maxsize == 2147483647:
+        # pip pull request #3497
+        result = "linux_i686"
+    return result
+
+
+def get_flag(var, fallback, expected=True, warn=True):
+    """Use a fallback value for determining SOABI flags if the needed config
+    var is unset or unavailable."""
+    val = get_config_var(var)
+    if val is None:
+        if warn:
+            warnings.warn("Config variable '{0}' is unset, Python ABI tag may "
+                          "be incorrect".format(var), RuntimeWarning, 2)
+        return fallback
+    return val == expected
+
+
+def get_abi_tag():
+    """Return the ABI tag based on SOABI (if available) or emulate SOABI
+    (CPython 2, PyPy)."""
+    soabi = get_config_var('SOABI')
+    impl = tags.interpreter_name()
+    if not soabi and impl in ('cp', 'pp') and hasattr(sys, 'maxunicode'):
+        d = ''
+        m = ''
+        u = ''
+        if get_flag('Py_DEBUG',
+                    hasattr(sys, 'gettotalrefcount'),
+                    warn=(impl == 'cp')):
+            d = 'd'
+        if get_flag('WITH_PYMALLOC',
+                    impl == 'cp',
+                    warn=(impl == 'cp' and
+                          sys.version_info < (3, 8))) \
+                and sys.version_info < (3, 8):
+            m = 'm'
+        if get_flag('Py_UNICODE_SIZE',
+                    sys.maxunicode == 0x10ffff,
+                    expected=4,
+                    warn=(impl == 'cp' and
+                          sys.version_info < (3, 3))) \
+                and sys.version_info < (3, 3):
+            u = 'u'
+        abi = '%s%s%s%s%s' % (impl, tags.interpreter_version(), d, m, u)
+    elif soabi and soabi.startswith('cpython-'):
+        abi = 'cp' + soabi.split('-')[1]
+    elif soabi:
+        abi = soabi.replace('.', '_').replace('-', '_')
+    else:
+        abi = None
+    return abi
+
+
 def safer_name(name):
     return safe_name(name).replace('-', '_')
 
@@ -88,7 +153,7 @@ class bdist_wheel(Command):
                      .format(', '.join(supported_compressions))),
                     ('python-tag=', None,
                      "Python implementation compatibility tag"
-                     " (default: py%s)" % get_impl_ver()[0]),
+                     " (default: '%s')" % (python_tag())),
                     ('build-number=', None,
                      "Build number for this particular version. "
                      "As specified in PEP-0427, this must start with a digit. "
@@ -116,7 +181,7 @@ def initialize_options(self):
         self.group = None
         self.universal = False
         self.compression = 'deflated'
-        self.python_tag = 'py' + get_impl_ver()[0]
+        self.python_tag = python_tag()
         self.build_number = None
         self.py_limited_api = False
         self.plat_name_supplied = False
@@ -178,6 +243,12 @@ def get_tag(self):
             if self.plat_name and not self.plat_name.startswith("macosx"):
                 plat_name = self.plat_name
             else:
+                # on macosx always limit the platform name to comply with any
+                # c-extension modules in bdist_dir, since the user can specify
+                # a higher MACOSX_DEPLOYMENT_TARGET via tools like CMake
+
+                # on other platforms, and on macosx if there are no c-extension
+                # modules, use the default platform name.
                 plat_name = get_platform(self.bdist_dir)
 
             if plat_name in ('linux-x86_64', 'linux_x86_64') and sys.maxsize == 2147483647:
@@ -192,8 +263,8 @@ def get_tag(self):
                 impl = self.python_tag
             tag = (impl, 'none', plat_name)
         else:
-            impl_name = get_abbr_impl()
-            impl_ver = get_impl_ver()
+            impl_name = tags.interpreter_name()
+            impl_ver = tags.interpreter_version()
             impl = impl_name + impl_ver
             # We don't work on CPython 3.1, 3.0.
             if self.py_limited_api and (impl_name + impl_ver).startswith('cp3'):
@@ -202,12 +273,8 @@ def get_tag(self):
             else:
                 abi_tag = str(get_abi_tag()).lower()
             tag = (impl, abi_tag, plat_name)
-            supported_tags = pep425tags.get_supported(
-                self.bdist_dir,
-                supplied_platform=plat_name if self.plat_name_supplied else None)
-            # XXX switch to this alternate implementation for non-pure:
-            if not self.py_limited_api:
-                assert tag == supported_tags[0], "%s != %s" % (tag, supported_tags[0])
+            supported_tags = [(t.interpreter, t.abi, t.platform)
+                              for t in tags.sys_tags()]
             assert tag in supported_tags, "would build wheel with unsupported tag {}".format(tag)
         return tag
 
@@ -286,7 +353,9 @@ def run(self):
 
         # Add to 'Distribution.dist_files' so that the "upload" command works
         getattr(self.distribution, 'dist_files', []).append(
-            ('bdist_wheel', get_python_version(), wheel_path))
+            ('bdist_wheel',
+             '{}.{}'.format(*sys.version_info[:2]),  # like 3.7
+             wheel_path))
 
         if not self.keep_temp:
             logger.info('removing %s', self.bdist_dir)
@@ -330,8 +399,8 @@ def license_paths(self):
         })
 
         if 'license_file' in metadata:
-            warn('The "license_file" option is deprecated. Use "license_files" instead.',
-                 DeprecationWarning)
+            warnings.warn('The "license_file" option is deprecated. Use '
+                          '"license_files" instead.', DeprecationWarning)
             files.add(metadata['license_file'][1])
 
         if 'license_file' not in metadata and 'license_files' not in metadata:

src/wheel/macosx_libfile.py

@@ -36,6 +36,7 @@
 """
 
 import ctypes
+import os
 import sys
 
 """here the needed const and struct from mach-o header files"""
@@ -339,3 +340,71 @@ def parse_version(version):
     y = (version & 0x0000ff00) >> 8
     z = (version & 0x000000ff)
     return x, y, z
+
+
+def calculate_macosx_platform_tag(archive_root, platform_tag):
+    """
+    Calculate proper macosx platform tag basing on files which are included to wheel
+
+    Example platform tag `macosx-10.14-x86_64`
+    """
+    prefix, base_version, suffix = platform_tag.split('-')
+    base_version = tuple([int(x) for x in base_version.split(".")])
+    if len(base_version) >= 2:
+        base_version = base_version[0:2]
+
+    assert len(base_version) == 2
+    if "MACOSX_DEPLOYMENT_TARGET" in os.environ:
+        deploy_target = tuple([int(x) for x in os.environ[
+            "MACOSX_DEPLOYMENT_TARGET"].split(".")])
+        if len(deploy_target) >= 2:
+            deploy_target = deploy_target[0:2]
+        if deploy_target < base_version:
+            sys.stderr.write(
+                 "[WARNING] MACOSX_DEPLOYMENT_TARGET is set to a lower value ({}) than the "
+                 "version on which the Python interpreter was compiled ({}), and will be "
+                 "ignored.\n".format('.'.join(str(x) for x in deploy_target),
+                                     '.'.join(str(x) for x in base_version))
+                )
+        else:
+            base_version = deploy_target
+
+    assert len(base_version) == 2
+    start_version = base_version
+    versions_dict = {}
+    for (dirpath, dirnames, filenames) in os.walk(archive_root):
+        for filename in filenames:
+            if filename.endswith('.dylib') or filename.endswith('.so'):
+                lib_path = os.path.join(dirpath, filename)
+                min_ver = extract_macosx_min_system_version(lib_path)
+                if min_ver is not None:
+                    versions_dict[lib_path] = min_ver[0:2]
+
+    if len(versions_dict) > 0:
+        base_version = max(base_version, max(versions_dict.values()))
+
+    # macosx platform tag do not support minor bugfix release
+    fin_base_version = "_".join([str(x) for x in base_version])
+    if start_version < base_version:
+        problematic_files = [k for k, v in versions_dict.items() if v > start_version]
+        problematic_files = "\n".join(problematic_files)
+        if len(problematic_files) == 1:
+            files_form = "this file"
+        else:
+            files_form = "these files"
+        error_message = \
+            "[WARNING] This wheel needs a higher macOS version than {}  " \
+            "To silence this warning, set MACOSX_DEPLOYMENT_TARGET to at least " +\
+            fin_base_version + " or recreate " + files_form + " with lower " \
+            "MACOSX_DEPLOYMENT_TARGET:  \n" + problematic_files
+
+        if "MACOSX_DEPLOYMENT_TARGET" in os.environ:
+            error_message = error_message.format("is set in MACOSX_DEPLOYMENT_TARGET variable.")
+        else:
+            error_message = error_message.format(
+                "the version your Python interpreter is compiled against.")
+
+        sys.stderr.write(error_message)
+
+    platform_tag = prefix + "_" + fin_base_version + "_" + suffix
+    return platform_tag