Add flake8 support

[robvdl]

I would really like to add flake8 support, flake8 produces an output file that contains both pep8 and pyflakes violations, but in one file.

[tomasbjerre]

Do you have a sample report that we can use when creating a parser?

[anze3db]

@tomasbjerre flake8 can you the same format as pylint:

[smotko:~/myproject]$ flake8 --format=pylint myproject
myproject/__init__.py:7: [F401] 'db' imported but unused
myproject/__init__.py:7: [F401] 'logger' imported but unused
myproject/__main__.py:8: [E401] multiple imports on one line
myproject/__main__.py:15: [F401] 'ggrc' imported but unused
myproject/__main__.py:19: [E402] module level import not at top of file
myproject/__main__.py:24: [E265] block comment should start with '# '
myproject/__main__.py:25: [E265] block comment should start with '# '
myproject/__main__.py:26: [E265] block comment should start with '# '
myproject/app.py:6: [F401] 'sys' imported but unused

But the issue is that I can't seem to figure out how to use the violations plugin for both pylint and flake8 at the same time. Any ideas?

[asfaltboy]

@Smotko shouldn't flake8 already include pylint results? If not, I believe it's possible to list multiple report files in the violation field (comma separated):

Kindly let us know if using --format=pylint and the pylint violation field works for you.

[anze3db]

@asfaltboy No, flake8 does not include pylint. flake8 is a wrapper for PyFlakes, pep8 & Ned Batchelder’s McCabe script.

My current workaround is to use the pep8 field which seems to be compatible with flake8's default output.

I didn't know you can specify multiple files, thanks for pointing that out!