#!/usr/bin/env bash

set -u

cacheFiles=()
while IFS= read -r stagedFile; do
    case "$stagedFile" in
        __pycache__/* | */__pycache__/* | *.pyc | *.pyo | *.pyd)
            cacheFiles+=("$stagedFile")
            ;;
    esac
done < <(git diff --cached --name-only --diff-filter=ACMR)

if [[ ${#cacheFiles[@]} -eq 0 ]]; then
    exit 0
fi

printf 'Commit blocked: remove generated Python cache files from the index:\n' >&2
printf '  %s\n' "${cacheFiles[@]}" >&2
printf '\nUse git rm --cached -- <file> to unstage forced additions.\n' >&2
exit 1