Determine how many files in a repo use LF/CRLF line endings.

line-ending-ratios.sh

#!/usr/bin/env bash
# SPDX-FileNotice: 🅭🄍1.0 This file is dedicated to the public domain using the CC0 1.0 Universal Public Domain Dedication <https://creativecommons.org/publicdomain/zero/1.0/>.
# SPDX-FileContributor: Jason Yundt <jason@jasonyundt.email> (2024)
set -o errexit -o nounset -o pipefail

file_listing="$(git ls-files --eol)"
function echo_file_listing {
	printf "%s\n" "$file_listing"
}

lf_files="$(echo_file_listing | grep --perl-regexp '^i/lf' | wc --lines)"
crlf_files="$(echo_file_listing | grep --perl-regexp '^i/crlf' | wc --lines)"
total_files="$(echo_file_listing | wc --lines)"
function calculate_percentage {
	bc <<< "scale=2; $*/$total_files * 100"
}

printf \
	"Total number of files that use LF line endings: %'d (%g%%)\n" \
	"$lf_files" \
	"$(calculate_percentage "$lf_files")"
printf \
	"Total number of files that use CRLF line endings: %'d (%g%%)\n" \
	"$crlf_files" \
	"$(calculate_percentage "$crlf_files")"
printf \
	"Total number of files: %'d\n" \
	"$total_files"