Extending flake8 linting rules.
Project by: Wesley Coomber, Rose Howell, Steven Sprecher, Kristen Escher

A flake8 linter plug-in that checks for bugs and bad practices which flake8 doesn't handle by default. The flake8-Smart plugin focuses on security and optimization for the target Python file.

First, install the base flake8 linter tool:

$ python<version> -m pip install flake8

Then, install the new flake8-plugin called flake8-Smart.

$ cd /compilersProjecto/flake8-Smart/
$ python setup.py install .

After installation, the flake8-Smart extension is active by default.
Verify this by checking flake8 --version for the flake8-Smart extension.
To lint a file, run flake8 test.py where test.py is the file you would like to lint.

• A370: Insecure hash function usage
• A371: Insecure cipher block mode

• A421: Dead code after if() constant number value
• A422: Dead code after conditional evaluating constant boolean value
• A423: Dead code after a conditional statement that is indirectly given a constant value
• A200: Redundant or superfluous constant assignment within a loop

Base dir of the project is /compilersProjecto/
Our plug-in is in /compilersProjecto/flake8-Smart/flake8_Smart.py
Our results are in /compilersProjecto/our_stuff.log
A PDF of our report is in /compilersProjecto/linter.pdf

compilersProjecto
- flake8-Smart/
    - flake8_Smart.py
    - reinstall.sh
    - setup.py
    - tests/
        - A200.py
        - A370.py
        - A371.py
        - A421.py
        - A422.py
        - A423.py
- helloWorldTest.py
- linter.pdf
- python_repository/
    - logs/
        - eyeo_sorted.log
        - our_plugin_sorted.log
        - our_stuff.log
        - out_plugin.log
        - vanilla_f8.log
    - pull_files_we_triggered_on.bash
    - python_code/
        - [3516 Python files for testing]
    - remove_new_rules.py
- README.md

Commands to generate our experiment results:

$ cd python_repository/python_code  # make sure you have flake8-eyeo + flake8-Smart plugin 
$ flake8 * > ../logs/our_stuff.log
$ cd ../
$ python2.7 remove_new_rules /logs/our_stuff.log /logs/our_plugin_sorted.log /logs/eyeo_sorted.log
$ ./pull_files_we_triggered_on.bash logs/our_plugin_sorted.log python_code FILES_WE_TRIGGERED_ON
$ ./gather_plugin_error_data.bash logs/our_plugin_sorted.log