060-delete-non-classes.sh

#!/usr/bin/env bash
# The MIT License (MIT)
#
# Copyright (c) 2021-2025 Yegor Bugayenko
#
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# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
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# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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set -e
set -o pipefail

home=$1
temp=$2

list=${temp}/filter-lists/non-class-files.txt
if [ -e "${list}" ]; then
    exit
fi

mkdir -p "$(dirname "${list}")"
touch "${list}"

jobs=${temp}/jobs/delete-non-classes.txt
rm -rf "${jobs}"
mkdir -p "$(dirname "${jobs}")"
touch "${jobs}"

candidates=${temp}/classes-to-challenge.txt
mkdir -p "$(dirname "${candidates}")"
find "${home}" -type f -name '*.java' -print > "${candidates}"
py=${LOCAL}/filters/delete-non-classes.py
while IFS= read -r f; do
    printf "python3 %s %s %s\n" "${py@Q}" "${f@Q}" "${list@Q}" >> "${jobs}"
done < "${candidates}"
"${LOCAL}/help/parallel.sh" "${jobs}"
wait

total=$(wc -l < "${candidates}" | xargs)
if [ -s "${list}" ]; then
    printf "%'d files out of %'d with interfaces or enums (instead of classes) inside were deleted" \
        "$(wc -l < "${list}" | xargs)" "${total}"
else
    printf "All %d files are Java classes, nothing to delete" \
        "${total}"
fi