Still not quiet enough

[evandrocoan]

I was looking for a quiet mode on #2195 (pylint: error: no such option: --quiet), but I just found out pylint is "quiet" by default. But still doing a too much output.

1. When not everything went fine, this new --quiet mode should do:

   1. Steps to reproduce
      Create the file test.py

      class ProductionDuplicated(object):
          pass
      
      class ProductionDuplicated(object):
          pass

   2. Current behavior
      Run pylint with the command:

      D:\tests>pylint --disable=I,E,R,W,C,F --enable=E0102 --reports=no test.py
      ************* Module test
      test.py:6:0: E0102: class already defined line 3 (function-redefined)
      
      ---------------------------------------------------------------------
      Your code has been rated at -2.50/10 (previous run: 10.00/10, -12.50)
      
      
      D:\tests>

   3. Expected behavior
      Run pylint with the command: (now with --quiet and 1 error to show)

      D:\tests>pylint --disable=I,E,R,W,C,F --enable=E0102 --reports=no --quiet test.py
      ************* Module test
      test.py:6:0: E0102: class already defined line 3 (function-redefined)
      D:\tests>

2. When everything went fine, this new --quiet mode should do:

   1. Steps to reproduce
      Create the file test.py

      class Production(object):
          pass
      
      class ProductionNotDuplicated(object):
          pass

   2. Current behavior
      Run pylint with the command:

      D:\tests>pylint --disable=I,E,R,W,C,F --enable=E0102 --reports=no test.py
      
      ---------------------------------------------------------------------
      Your code has been rated at 10.00/10 (previous run: -2.50/10, +12.50)
      
      
      D:\tests>

   3. Expected behavior

      Run pylint with the command: (now with --quiet and no error to show)

      D:\tests>pylint --disable=I,E,R,W,C,F --enable=E0102 --reports=no --quiet test.py
      D:\tests>

pylint --version output

pylint --version
pylint 2.0.0.dev1
astroid 1.6.1
Python 3.6.3 |Anaconda, Inc.| (default, Oct 15 2017, 03:27:45) [MSC v.1900 64 bit (AMD64)]

[PCManticore]

Yes, those were explicitly omitted from being under --quiet/--verbose. You can control the score with -sn and the whole report with -rn. The reason for this is that we can't be fully quiet by default, since it would mean hiding the score and the reports, and at least the score is pretty useful for newcomers to the tool. Still this means there are three options that controls how verbose pylint is, but all you really need is -rn for disabling everything report related. The current --verbose is used just for printing the configuration file that is used by pylint.