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raf.sh
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raf.sh
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#!/usr/bin/env bash
# The MIT License (MIT)
#
# Copyright (c) 2021-2024 Yegor Bugayenko
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# 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
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
set -e
set -o pipefail
java=$1
output=$(realpath "$2")
cd "$(dirname "${java}")"
base=$(basename "${java}")
# To check that file was added in commit any time
if git status > /dev/null 2>&1 && test -n "$(git log --oneline -- "${base}")"; then
file_creation=$(git log --pretty=format:"%ci" --date=default -- "${base}" | tail -n 1)
repo_creation=$(git log --reverse --format="format:%ci" | sed -n 1p)
current_time=$(date "+%Y-%m-%d %H:%M:%S %z")
file_creation_timestamp=$(date -d "$file_creation" +%s)
repo_creation_timestamp=$(date -d "$repo_creation" +%s)
current_time_timestamp=$(date -d "$current_time" +%s)
from_file_creation=$((current_time_timestamp - file_creation_timestamp))
from_repo_creation=$((current_time_timestamp - repo_creation_timestamp))
raf=$(echo 'import sys; print(float(sys.argv[1])/float(sys.argv[2]) if float(sys.argv[2]) != 0 else 1.0)' | python3 - $((from_file_creation)) $((from_repo_creation)))
else
raf=0
fi
echo "RAF ${raf} Relative Age of File (in the entire timeframe of repository existence), \
where 0.0 means the file was added in the first commit and 1.0 means that \
the file was added in the last commit" > "${output}"