untracked files in git are creating dirty state

[jaraco]

In Mercurial and in Git prior to the fix for #86 released with setuptools_scm 1.13.1, untracked files would not cause a dirty state, but since 1.13.1, they do.

$ git status
On branch master
Your branch is up-to-date with 'origin/master'.
Untracked files:
  (use "git add <file>..." to include in what will be committed)

    .tox/

nothing added to commit but untracked files present (use "git add" to track)
$ python -m pip install setuptools_scm==1.13.0
Collecting setuptools_scm==1.13.0
  Downloading setuptools_scm-1.13.0-py2.py3-none-any.whl
Installing collected packages: setuptools-scm
Successfully installed setuptools-scm-1.13.0
$ python setup.py --quiet sdist
$ ls dist
rwt-2.13.tar.gz
$ python -m pip uninstall -y setuptools_scm
Uninstalling setuptools-scm-1.13.0:
  Successfully uninstalled setuptools-scm-1.13.0
$ python setup.py --quiet sdist            
$ ls dist
rwt-2.13.tar.gz                 rwt-2.14.dev0+ngd08ab93.d20161012.tar.gz

My opinion and the expectation of environments based on past behavior is that untracked files shouldn't create a dirty state. Only modified files or perhaps staged files should cause the project to detect as dirty. The git describe output seems to be the same before and after removing the untracked files.

$ git describe --tags --long   
2.13-0-gd08ab93
$ rm -R .tox
$ git describe --tags --long
2.13-0-gd08ab93

[jaraco]

This issue is causing the automatic deployment of my projects to fail where it worked before. I can probably try to figure out which files get created and add them to .gitignore, but I'd rather avoid that if I can. I have some projects where there are many files generated that are meant to be included in the package (because they're specifically mentioned in MANIFEST.in), but aren't tracked in the repo.

[jaraco]

Thanks!