prepare-commit-msg-stats

#!/bin/sh

if [ "$2" = "template" ] || [ "$2" = "commit" ]
then
    STAT="$( command git diff --cached --shortstat )"
    if [ -n "${STAT}" ]
    then
        INS="$( echo "${STAT}" | grep -Eo '[0-9]+ insertion' | grep -o '[0-9]*' )"
        DEL="$( echo "${STAT}" | grep -Eo '[0-9]+ deletion'  | grep -o '[0-9]*' )"
        INS="${INS:-0}"
        DEL="${DEL:-0}"

        if [ "${DEL}" -gt "${INS}" ]
        then
            printf "# (·o·),🎉 -< You are deleting more lines, than adding. >\n" \
                >> "${COMMIT_MSG}"
        fi
        printf "# %s\n#\n" "${STAT}" >> "${COMMIT_MSG}"
    fi
fi