nuke-nth

#!/usr/bin/env bash

if [[ -z "$1" ]]; then
    echo "nuke-nth: Deletes every Nth file in the cached stories directory."
    echo "Usage: nuke-nth <N>"
    exit 1
fi

CACHED_STORIES_DIR=/srv/timbos-hn-reader/cached_stories/
NTH=$1
COUNTER=0

if [[ ! -d "${CACHED_STORIES_DIR}" ]]; then
    echo "Error: Cached stories directory does not exist."
    exit 1
fi

delete_file() {
    local file=$1
    local file_display_name=$(basename "${file}")
    if [[ -f "${file}" ]]; then
        if rm --force "${file}"; then
            echo "${file_display_name} deleted."
        else
            echo "${file_display_name} couldn't be deleted for some reason."
            exit 1
        fi
    else
        echo "${file_display_name} doesn't exist."
    fi
}

find "${CACHED_STORIES_DIR}" -maxdepth 1 -type f -name "*.pickle" | sort | while read FILE; do
    if (( ${COUNTER} == 0 )); then
        delete_file "${FILE}"
    fi

    (( COUNTER += 1 ))
    (( COUNTER %= NTH ))
done