title: How to get coverage report from a given package using nose2
body: <p>I would like to use <a href="https://github.com/nose-devs/nose2" rel="noreferrer">nose2</a> with coverage plugin to get the coverage of a Python package but I'm have a hard time configuring it to cover only the package I'm working on. The package is called <code>vimhdl</code> and the coverage section of my <code>unittest.cfg</code> looks like this:</p>
  
  <pre><code>[coverage]
  coverage = vimhdl
  </code></pre>
  
  <p>With <strong>nose2</strong>, the result doesn't include all files from the package (maybe because of <code>Coverage.py warning: Module vimhdl was previously imported, but not measured.</code> message, but I don't know how to fix it).</p>
  
  <p>Also, when opening the HTML report for a given file, statements such as  <code>import logging</code> and modules' doc strings are marked as not covered.</p>
  
  <pre><code>$ nose2 --with-coverage   -vvv
  ...
  ----------------------------------------------------------------------
  Ran 5 tests in 0.166s
  
  OK
  Coverage.py warning: Module vimhdl was previously imported, but not measured.
  ---------- coverage: platform linux2, python 2.7.10-final-0 ----------
  Name                                  Stmts   Miss  Cover
  ---------------------------------------------------------
  python/vimhdl/compilers/__init__.py      95     42    56%
  python/vimhdl/compilers/ghdl.py          92     41    55%
  python/vimhdl/config_parser.py           74     42    43%
  python/vimhdl/project_builder.py        269    164    39%
  python/vimhdl/source_file.py            126     51    60%
  ---------------------------------------------------------
  TOTAL                                   656    340    48%
  </code></pre>
  
  <p>On the other hand, with <strong>nosetests</strong>, the result include all files as expected. </p>
  
  <pre><code>$ nosetests --with-coverage -vvv
  
  Name                           Stmts   Miss  Cover   Missing
  ------------------------------------------------------------
  vimhdl.py                          5      0   100%   
  vimhdl/compilers.py               95     11    88%   46-47, 97, 106-108, 131-132, 149-150, 158
  vimhdl/compilers/fallback.py      22      7    68%   31-32, 35, 38, 41, 44, 47
  vimhdl/compilers/ghdl.py          92     21    77%   91-94, 107-108, 151-172, 182
  vimhdl/compilers/msim.py          94     72    23%   49, 52-69, 73-102, 113-124, 128-135, 138-151, 154-159, 163-169, 176-179, 185-190
  vimhdl/compilers/xvhdl.py         61     46    25%   38-40, 44-51, 54-76, 87-98, 101-105, 110-126
  vimhdl/config.py                  69     46    33%   21-22, 55-77, 81-83, 87-91, 95-105, 109-122, 126-135
  vimhdl/config_parser.py           74     25    66%   33-34, 45-46, 50, 53-88, 117, 119, 124, 133
  vimhdl/exceptions.py              12      4    67%   21, 24, 28, 31
  vimhdl/project_builder.py        269    114    58%   23-24, 61-68, 92, 97, 102, 108, 115-121, 131-134, 139-146, 156, 169-170, 182-185, 205-219, 221, 237-273, 278-313, 332-336, 368-371, 373-376, 380-381, 384-385, 393-394, 400, 419-426, 430-431, 455-456, 462-476
  vimhdl/source_file.py            126     25    80%   71, 86-87, 168, 172, 174, 176, 178, 197-198, 203-216, 219
  vimhdl/static_check.py           104     88    15%   56-112, 119-132, 139-165, 169-188, 191-197, 200
  vimhdl/utils.py                    8      5    38%   24-28
  ------------------------------------------------------------
  TOTAL                           1031    464    55%   
  </code></pre>
  
  <p>How do I configure <code>nose2</code> coverage plugin to cover only a given module?</p>
  
  <p>The source code is on github at <a href="https://github.com/suoto/vim-hdl/tree/unstable" rel="noreferrer">https://github.com/suoto/vim-hdl/tree/unstable</a> if it helps.</p>