[MacPorts] #54868: py-ipython: missing dependencies on py-typing and py-pathlib2 for some python versions

[MacPorts]

#54868: py-ipython: missing dependencies on py-typing and py-pathlib2 for some
python versions
----------------------+------------------------
 Reporter:  Ionic     |      Owner:  lpsinger
     Type:  defect    |     Status:  new
 Priority:  Normal    |  Milestone:
Component:  ports     |    Version:
 Keywords:  haspatch  |       Port:  py-ipython
----------------------+------------------------
 Following error occurred when installing `py34-ipykernel` (as a dependency
 of something else):

 {{{
 :info:build Executing:  cd
 "/opt/local/var/macports/build/_opt_local_var_macports_sources_macports.rsync.ionic
 .de_release_ports_python_py-ipykernel/py34-ipykernel/work/ipykernel-4.6.1"
 &&
 /opt/local/Library/Frameworks/Python.framework/Versions/3.4/bin/python3.4
 setup.py --no-user-cfg build
 :debug:build system:  cd
 "/opt/local/var/macports/build/_opt_local_var_macports_sources_macports.rsync.ionic
 .de_release_ports_python_py-ipykernel/py34-ipykernel/work/ipykernel-4.6.1"
 &&
 /opt/local/Library/Frameworks/Python.framework/Versions/3.4/bin/python3.4
 setup.py --no-user-cfg build
 :info:build Traceback (most recent call last):
 :info:build   File "setup.py", line 91, in <module>
 :info:build     from ipykernel.kernelspec import write_kernel_spec,
 make_ipkernel_cmd, KERNEL_NAME
 :info:build   File
 "/opt/local/var/macports/build/_opt_local_var_macports_sources_macports.rsync.ionic
 .de_release_ports_python_py-
 ipykernel/py34-ipykernel/work/ipykernel-4.6.1/ipykernel/__init__.py", line
 2, in <module>
 :info:build     from .connect import *
 :info:build   File
 "/opt/local/var/macports/build/_opt_local_var_macports_sources_macports.rsync.ionic
 .de_release_ports_python_py-
 ipykernel/py34-ipykernel/work/ipykernel-4.6.1/ipykernel/connect.py", line
 13, in <module>
 :info:build     from IPython.core.profiledir import ProfileDir
 :info:build   File
 "/opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4
 /site-packages/IPython/__init__.py", line 55, in <module>
 :info:build     from .terminal.embed import embed
 :info:build   File
 "/opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4
 /site-packages/IPython/terminal/embed.py", line 16, in <module>
 :info:build     from IPython.terminal.interactiveshell import
 TerminalInteractiveShell
 :info:build   File
 "/opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4
 /site-packages/IPython/terminal/interactiveshell.py", line 32, in <module>
 :info:build     from .debugger import TerminalPdb, Pdb
 :info:build   File
 "/opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4
 /site-packages/IPython/terminal/debugger.py", line 6, in <module>
 :info:build     from IPython.core.completer import IPCompleter
 :info:build   File
 "/opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4
 /site-packages/IPython/core/completer.py", line 132, in <module>
 :info:build     from typing import Iterator, List, Tuple, Iterable, Union
 :info:build ImportError: No module named 'typing'
 :info:build Command failed:  cd
 "/opt/local/var/macports/build/_opt_local_var_macports_sources_macports.rsync.ionic
 .de_release_ports_python_py-ipykernel/py34-ipykernel/work/ipykernel-4.6.1"
 &&
 /opt/local/Library/Frameworks/Python.framework/Versions/3.4/bin/python3.4
 setup.py --no-user-cfg build
 :info:build Exit code: 1
 }}}

 Turns out: that's right.

 According to
 [https://github.com/ipython/ipython/blob/d86648c5decf384cf7182b7214d01429cf9e6047/setup.py#L203
 ipython's setup.py file], we need to depend upon `py-pathlib2` for python
 3.3 and `py-typing` for python 3.4 and below.

 I'll attach a patch for you to review. If you're okay with it, I can also
 commit it.

--
Ticket URL: <https://trac.macports.org/ticket/54868>
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