pre-commit-flake8

#! /bin/bash

while read -r f
do
    if $(git diff-files --quiet -- ":(literal)$f")
    then
        # Check the file in the worktree since there are no unstaged changes.
        flake8 "$f" || err=1
    else
        # Pipe staged changes to flake8 and replace 'stdin:<error>' with
        # '<filename>(staged):<error>'.
        git cat-file -p ":$f" | flake8 - | sed "s|^stdin|${f/|/\\|}(staged)|"
        [ "${PIPESTATUS[1]}" = "0" ] || err=1
    fi
done < <(git diff-index --diff-filter=AM --cached --name-only HEAD -- \*.py)

exit ${err-0}