#!/bin/sh

QFILE="${HOME}"/createrepo.queue
REPOS_ROOT="${HOME}"/repos

createrepo_loop() {
    while sleep 30; do
        [ -f "${QFILE}" ] || continue
        mv "${QFILE}" "${QFILE}.work"
        sort -u "${QFILE}.work" > "${QFILE}.sorted"
        while read dir; do
            printf 'Generating repository metadata for %s\n' "${dir}"
            createrepo_c "${dir}"
        done < "${QFILE}.sorted"
        rm -f "${QFILE}.work" "${QFILE}.sorted"
    done
}

inotify_loop() {
    stdbuf -o 0 inotifywait \
        --monitor \
        --event close_write,move,delete \
        --recursive \
        "${REPOS_ROOT}" \
        | stdbuf -o 0 grep -E '\.rpm$' \
        | while read dir _ _; do
            flock "${QFILE}" sh -c 'echo "$1" >> "$2"' -- "${dir}" "${QFILE}"
        done
}

mkdir -p "${REPOS_ROOT}"

createrepo_loop &
inotify_loop &
wait