scripts/run-flake8

#!/bin/sh
# Run flake8 (Python linter) on the source directory or on the given files/directories

# Run on the base directory if no argument has been given
if [ $# -eq 0 ] ; then
    cd "$(dirname -- "$0")/.." || exit $?

    # Run on both files ending with .py and Python files without extension
    # shellcheck disable=SC2046
    set -- $( (find . -name '*.py' ; grep -l -e '^#!\s*/usr/bin/python' -e '^#!/usr/bin/env python' -r .) | grep -v '^\./\.git/' | sort -u )
    echo "Analyzing $# Python scripts"
fi

# Assign each ignore warning on a line, in order to ease testing enabling the warning again
IGNORE_LIST=''

# Important warnings that should be fixed
# (Comment one line and run this script in order to see where the warning occurs)
IGNORE_LIST="$IGNORE_LIST,W191" # indentation contains tabs

IGNORE_LIST="$IGNORE_LIST,E101" # indentation contains mixed spaces and tabs
IGNORE_LIST="$IGNORE_LIST,E711" # comparison to None should be 'if cond is not None:'
IGNORE_LIST="$IGNORE_LIST,E712" # comparison to False should be 'if cond is False:' or 'if not cond:'
IGNORE_LIST="$IGNORE_LIST,E722" # do not use bare 'except'

IGNORE_LIST="$IGNORE_LIST,F401" # module imported but unused
IGNORE_LIST="$IGNORE_LIST,F841" # local variable '...' is assigned to but never used


# Less-important warnings
IGNORE_LIST="$IGNORE_LIST,W291" # trailing whitespace
IGNORE_LIST="$IGNORE_LIST,W293" # blank line contains whitespace
IGNORE_LIST="$IGNORE_LIST,W391" # blank line at end of file
IGNORE_LIST="$IGNORE_LIST,W503" # line break before binary operator
IGNORE_LIST="$IGNORE_LIST,W504" # line break after binary operator

IGNORE_LIST="$IGNORE_LIST,E111" # indentation is not a multiple of four
IGNORE_LIST="$IGNORE_LIST,E114" # indentation is not a multiple of four (comment)
IGNORE_LIST="$IGNORE_LIST,E115" # expected an indented block (comment)
IGNORE_LIST="$IGNORE_LIST,E116" # unexpected indentation (comment)
IGNORE_LIST="$IGNORE_LIST,E122" # continuation line missing indentation or outdented
IGNORE_LIST="$IGNORE_LIST,E123" # closing bracket does not match indentation of opening bracket's line
IGNORE_LIST="$IGNORE_LIST,E126" # continuation line over-indented for hanging indent
IGNORE_LIST="$IGNORE_LIST,E127" # continuation line over-indented for visual indent
IGNORE_LIST="$IGNORE_LIST,E128" # continuation line under-indented for visual indent
IGNORE_LIST="$IGNORE_LIST,E201" # whitespace after '['
IGNORE_LIST="$IGNORE_LIST,E202" # whitespace before '}'
IGNORE_LIST="$IGNORE_LIST,E203" # whitespace before ':'
IGNORE_LIST="$IGNORE_LIST,E211" # whitespace before '('
IGNORE_LIST="$IGNORE_LIST,E221" # multiple spaces before operator
IGNORE_LIST="$IGNORE_LIST,E222" # multiple spaces after operator
IGNORE_LIST="$IGNORE_LIST,E225" # missing whitespace around operator
IGNORE_LIST="$IGNORE_LIST,E226" # missing whitespace around arithmetic operator
IGNORE_LIST="$IGNORE_LIST,E231" # missing whitespace after ','
IGNORE_LIST="$IGNORE_LIST,E241" # multiple spaces after ':'
IGNORE_LIST="$IGNORE_LIST,E251" # unexpected spaces around keyword / parameter equals
IGNORE_LIST="$IGNORE_LIST,E261" # at least two spaces before inline comment
IGNORE_LIST="$IGNORE_LIST,E265" # block comment should start with '# '
IGNORE_LIST="$IGNORE_LIST,E266" # too many leading '#' for block comment
IGNORE_LIST="$IGNORE_LIST,E272" # multiple spaces before keyword
IGNORE_LIST="$IGNORE_LIST,E275" # missing whitespace after keyword
IGNORE_LIST="$IGNORE_LIST,E301" # expected 1 blank line, found 0
IGNORE_LIST="$IGNORE_LIST,E302" # expected 2 blank lines, found 1
IGNORE_LIST="$IGNORE_LIST,E303" # too many blank lines
IGNORE_LIST="$IGNORE_LIST,E305" # expected 2 blank lines after class or function definition, found 0
IGNORE_LIST="$IGNORE_LIST,E306" # expected 1 blank line before a nested definition, found 0
IGNORE_LIST="$IGNORE_LIST,E401" # multiple imports on one line
IGNORE_LIST="$IGNORE_LIST,E402" # module level import not at top of file
IGNORE_LIST="$IGNORE_LIST,E501" # line too long
IGNORE_LIST="$IGNORE_LIST,E701" # multiple statements on one line (colon)
IGNORE_LIST="$IGNORE_LIST,E704" # multiple statements on one line (def)
IGNORE_LIST="$IGNORE_LIST,E731" # do not assign a lambda expression, use a def
IGNORE_LIST="$IGNORE_LIST,E741" # ambiguous variable name 'l' / 'I'

IGNORE_LIST="$IGNORE_LIST,F403" # 'from ... import *' used; unable to detect undefined names
IGNORE_LIST="$IGNORE_LIST,F405" # '...' may be undefined, or defined from star imports

# Ignore errors from files generated from SWIG
IGNORE_LIST="$IGNORE_LIST,F811" # redefinition of unused ...


exec flake8 --max-line-length=120 --builtins='_,basestring,unicode' --ignore=",$IGNORE_LIST" "$@"