Use rspolib instead of polib

[mondeja]

Looks like possible and should improve performance. See https://launchpad.net/pygettextpo

• How to know if libgettextpo is available? Run ctypes.util.find_library("gettextpo") in setup.py. If returns None is not available.

To read PO files without defined charset "MIME-Version: 1.0\\n"\n"Content-Type: text/plain; charset=utf-8\\n" must be added to the headers or the next error will be raised:

Error

>>> gettextpo.PoFile('example.po')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
gettextpo.error: Charset missing in header.
Message conversion to user's charset will not work.

[mondeja]

I've done some tests in a local branch. Seems that the current implementation of the library is not enough complete. Create the same interface of polib using the library at C level would be the greatest improvement.

[mondeja]

After the developing of md-ulb-pwrap I'm thinking that the best option to optimize the usage of polib is rewriting the library as a CPython extension with Rust.

[mondeja]

I've written rspolib some months ago, so use that.