#! /bin/bash

ROCKY_VERSION=8.10
MAN_OUTPUT=./export/${ROCKY_VERSION}/
DIRECTORY=$1

if [ -z "$DIRECTORY" ]; then
    echo "Please provide the directory containing the RPM files"
    exit 1
fi

mkdir -p "$MAN_OUTPUT"

extract_man_pages() {
    local rpm=$1
    local man_output=$2

    MANCOUNT=$(rpm2cpio "$rpm" | cpio -itv --quiet | grep -c "/man/")
    RPMNAME=$(rpm -qp --qf "%{NAME}\n" "$rpm")
    if [ "$MANCOUNT" -ne 0 ]; then
        mkdir -p "${man_output}/${RPMNAME}"
        rpm2cpio "$rpm" | cpio -idmv --quiet -D "${man_output}/${RPMNAME}/" '*/man/*'
    fi
}

export -f extract_man_pages

find "$DIRECTORY" -type f -name "*.rpm" | parallel --will-cite -j+0 extract_man_pages {} "$MAN_OUTPUT"