This reveals problems in the packaging test suite, which I’ll look
into after the regrtest checks are made more usable (see #12314).

- minor cleanup in Metadata
- trigger creation of the sysconfig._CONFIG_VARS dict
- home_page is used over home-page: it’s not a compound word, it’s an
  escaped space

Distutils2 is now synchronized with Packaging.

This was caught in the distutils2 repo by pyflakes.

PEP 370 features and sys.dont_write_bytecode are always available
in 3.3; the distutils2 backport still has the conditionals.

I also renamed an internal misnamed method and fixed a few things
(“packaging2” name, stray print, unused import, fd leak).

to unwarranted assumption about absolute paths: on OS X /var is a
symlink to /private/var.  (Also true for /etc and /tmp).

find_module() now raises a RuntimeError, instead of ImportError, on an error on
sys.path or sys.meta_path because load_package() and import_submodule() returns
None and clear the exception if a ImportError occurred.

find_module() now raises a RuntimeError, instead of ImportError, on an error on
sys.path or sys.meta_path because load_package() and import_submodule() returns
None and clear the exception if a ImportError occurred.

This method was supposed to return only the file under the dist-info
directory, but it actually returned all installed files.

The tests didn’t catch this because they were flawed; I updated them.
Thanks to Nadeem Vawda and Jeremy Kloth for testing.

As a bonus, the removal of os.path.relpath use should also fix the
Windows buildbots.

with invalid hex escape sequences, like b'\x0'.
(Original patch by Claudiu Popa.)

with invalid hex escape sequences, like b'\x0'.
(Original patch by Claudiu Popa.)

sys/xattr.h is glibc while attr/xattr.h is a separate library.

  object triggers the garbage collector.

object triggers the garbage collector.

Factor out the distribution file-system safe name functions from install_distinfo to allow all metadata consumers access to them.