#!/bin/sh


if [ $# -eq 0 ]; then
    echo "dos2unix whole directory, keeping timestamps"
    echo ""
    echo "$0 <directory1/dos> <directory2/ux>"
    echo "it will copy contents of <dir1> to <dir2> changing new lines from dos to unix"
    exit 0
fi


# reference dir:
DIR0="${1}"
# new dir:
DIR1="${2}"
if [ -d "${DIR1}" ]; then
    echo "directory ${DIR1} exists, do you want to continue? [y/N]"
    read ANS
    if [ "${ANS}" == "y" ] || [ "${ANS}" == "Y" ]; then
        continue
    else
        exit 0
    fi
fi

cd "${DIR0}"

SCRIPT="d2u-dir-XXXXX.sh"
echo '#!/bin/sh' > "../${SCRIPT}"

RM_TRAILING="y" # comment or set empty string if you want to keep trailing spaces
if [ $RM_TRAILING ]; then
    TRS=' | sed -e "s/\s*$//"'
else
    TRS=""
fi

# extensions to be excluded from processing (binary)
# binaries/executables
EXCL_EXT='\.a$|\.dsp$|\.dsw$|\.exe$|\.lib$|\.pyc$|\.res$|\.sfx$'
# crlf text
EXCL_EXT="$EXCL_EXT"'|\.dsp$|\.dsw$'
# images
EXCL_EXT="$EXCL_EXT"'|\.bmp$|\.cur$|\.gif$|\.ico$|\.jpg$|\.jpeg$|\.png$|\.tga$'
# archives
EXCL_EXT="$EXCL_EXT"'|\.7z$|\.bz2$|\.gz$|\.lz$|\.rar$|\.tar$|\.xz$|\.zip$|\.zstd$'
# documents
EXCL_EXT="$EXCL_EXT"'|\.chm$|\.doc$|\.docx$|\.hlp$|\.odf$|\.odg$|\.odp$|\.ods$|\.odt$|\.pdf$|\.xls$|\.xlsx$'
# audio
EXCL_EXT="$EXCL_EXT"'|\.flac$|\.mp3$|\.ogg$|\.wav$|\.wv$'
# video
EXCL_EXT="$EXCL_EXT"'|\.3gp$|\.avi$|\.m4a$|\.mp4$|\.ogv$|\.webm$'

find . -type d -exec echo "mkdir -p ${DIR1}/{}" ";" >>  "../${SCRIPT}"
echo "" >> ../${SCRIPT}
find . -type f -exec echo "d2u ${DIR0}/{} $TRS > ${DIR1}/{}; touch -r ${DIR0}/{} ${DIR1}/{}" ";" | grep -iEv "$EXCL_EXT"  >>  "../${SCRIPT}"
find . -type f -exec echo "cat ${DIR0}/{} > ${DIR1}/{}; touch -r ${DIR0}/{} ${DIR1}/{}" ";" | grep -iE "$EXCL_EXT"  >>  "../${SCRIPT}"
echo "" >> ../${SCRIPT}
find . -type d -exec echo "touch -r ${DIR0}/{} ${DIR1}/{}" ";" >>  "../${SCRIPT}"
echo "" >> ../${SCRIPT}

cd ..

sh ${SCRIPT}
rm ${SCRIPT} # delete or keep script for debugging