[NEW PORT] graphics/py-graphviz: Simple Python interface for Graphviz

[dbaio]

Summary

[NEW PORT] graphics/py-graphviz: Simple Python interface for Graphviz

 This package facilitates the creation and rendering of graph descriptions in the
 DOT language of the Graphviz graph drawing software (repo) from Python.

 Create a graph object, assemble the graph by adding nodes and edges, and
 retrieve its DOT source code string. Save the source code to a file and render
 it with the Graphviz installation of your system.

 Use the view option/method to directly inspect the resulting (PDF, PNG, SVG,
 etc.) file with its default application. Graphs can also be rendered and
 displayed within Jupyter notebooks (a.k.a. IPython notebooks, example) as well
 as the Jupyter Qt Console.

 WWW: https://github.com/xflr6/graphviz

 Already existed a port named graphics/py-graphviz, it was moved in
 ports r408353 to graphics/py-pygraphviz because it was using an 
 incorrect name. More info in the commit log [1].

 1 - https://svnweb.freebsd.org/ports?view=revision&revision=408353

 PR:		222205
 Reviewed by:	koobs, ???
 Submitted by:	[e-mail]
 Differential Revision:	D12319

Test Plan

Already existed a port named graphics/py-graphviz, it was moved in
ports r408353 to graphics/py-pygraphviz because it was using an
incorrect name. More info in the commit log.

I want to be sure about the change in the MOVED file.
There is no mention about this in the PH 10.2.2. /usr/ports/MOVED

Thanks.

[koobs]

Removing a MOVED entry for a re-added (resurrected) port is standard/expected.

However, for cases where the re-added package is not the same software as was provided prior to deletion, there is no mechanism that I know of in the ports framework (policy or otherwise) to ensure that users that might still have the old port/package installed wont have it replaced with the later (newer, re-added) one once its re-added.

Having said that, waiting a sufficient amount of time minimises this risk. The original graphics/py-graphviz port was deleted 18 months ago, which I would consider enough time.

Note: I have had this problem with the (incorrectly named, now deleted) net/py-twitter port, when I was porting the PyPI twitter package, which I committed as net/py-twitter-tools until a sufficient amount of time passed. I still haven't moved it to its proper place/name :)

No mention of QA tests (portlint, poudriere) results in TEST PLAN, please add these.

Also, for python packages that provide tests (this one does), add TEST_DEPENDS and a do-test: target to run them where possible, even if they don't all pass.

See: https://github.com/xflr6/graphviz/blob/master/.travis.yml#L18-L19 (only add packages *required* to run the tests, which probably doesnt include coveralls)

[dbaio]

Add test target, it's needed a new dependency (devel/py-pytest-cov).
Add Python concurrent.

============================================================================ 
test session starts 
============================================================================
platform freebsd12 -- Python 2.7.13, pytest-3.2.1, py-1.4.34, pluggy-0.4.0
rootdir: /usr/home/dbaio/FreeBSD/ports_head/graphics/py-graphviz/work/graphviz-0.8, inifile: setup.cfg
plugins: mock-1.6.2, cov-2.5.1
collected 80 items

README.rst .
docs/manual.rst .
graphviz/__init__.py .
graphviz/dot.py .
graphviz/lang.py ....
graphviz/tools.py ..
tests/test_backend.py ........................
tests/test_dot.py ......................
tests/test_files.py ..................
tests/test_lang.py ....
tests/test_tools.py ..

-------- coverage: platform freebsd12, python 2.7.13-final-0 ---------
Name                   Stmts   Miss  Cover
------------------------------------------
graphviz/__init__.py      13      0   100%
graphviz/_compat.py        3      0   100%
graphviz/backend.py       82      0   100%
graphviz/dot.py          111      0   100%
graphviz/files.py        113      0   100%
graphviz/lang.py          39      0   100%
graphviz/tools.py         17      0   100%
------------------------------------------
TOTAL                    378      0   100%
Coverage HTML written to dir cover


========================================================================= 
80 passed in 1.80 seconds 
=========================================================================

$ portlint -CA
looks fine.

poudriere OK with Python 2.7 and 3.6.

10.3-RELEASE-p21 amd64
10.3-RELEASE-p21 i386
11.1-RELEASE-p1 amd64
11.1-RELEASE-p1 i386
12.0-CURRENT 1200044 amd64
12.0-CURRENT 1200044 i386

[koobs]

Always add test/QA results to TEST PLAN (so people don't need to go searching for them)

Otherwise, changes look OK