pre-commit-flake8

#!/usr/bin/env bash

DEBUG=0

debug_echo() {
    if [ "$DEBUG" -ne "0" ]; then
        echo "$*"
    fi
}

# flake8 config location
CONFIG_FILE=''

RET_VAL=0

RESTORE='\033[0m'
RED='\033[00;31m'
BOLD=$(tty -s && tput bold)

trap cleanup EXIT SIGHUP SIGINT SIGTERM

cleanup() {
    # cleanup after yourself!
    debug_echo "deleting ${temp_files[@]}"
    rm -f "${temp_files[@]}"
}


lint_files=()
temp_files=()


for file in `git diff --name-only --cached --diff-filter=d | grep '\.py$'`; do
    if `git diff --quiet "$file"`; then
        # no dirty version in working tree,
        lint_files+=("$file")
    else
        # need to leave working tree untouched, so 
        # save staged contents of file to temp file
        temp_and_orig_files=(`git checkout-index --temp "$file"`)
        temp_file=${temp_and_orig_files[0]}
        temp_files+=("$temp_file")
        lint_files+=("$temp_file")
    fi
done

echo ${lint_files[@]} | xargs flake8 --config="$CONFIG_FILE" --quiet
RET_VAL=$?


if [ "$RET_VAL" -ne 0 ]; then
    echo -e "${BOLD}flake8: ${RED}FAILED ${RESTORE}checks"
fi

exit "$RET_VAL"