apt.sh

#!/bin/bash

function error() {
    echo -e "$1" 1>&2
    exit 1
}

function change_owner() {
    chown -R _apt:root "$1" || error "FAILED TO CHANGE OWNER : $1"
}

function make_directory() {
    mkdir -p -m755 "$1" || error "FAILED TO MAKE DIRECTORY : $1"
}

function help() {
    error "Usage:\n\tdownload <package1> <package2> ...\n\tinstall  <package1> <package2> ..."
}

if [ $# -gt 0 ]; then
    COMMAND="$1"
    shift
else
    help
fi

if [[ $EUID -ne 0 ]]; then
    error "RUN AS ROOT"
fi

OS_RELEASE=$(source /etc/os-release && echo $ID-$VERSION_ID)
ABSOLUTE_BASE_PATH=$(realpath $(dirname ${BASH_SOURCE[0]}))/$OS_RELEASE
make_directory "$ABSOLUTE_BASE_PATH"
change_owner "$ABSOLUTE_BASE_PATH"
cd "$ABSOLUTE_BASE_PATH"

if [[ "$COMMAND" == "download" ]]; then

    for PACKAGE in "$@"; do
        if ! apt-cache show "$PACKAGE" >/dev/null 2>&1; then
            error "🔴 [$PACKAGE] APT-CACHE NOT FOUND PACKAGE"
         fi
    done

    for PACKAGE in "$@"; do

        mapfile -t ALL_PACKAGE_AND_DEPENDS < <(apt-cache depends --recurse --no-recommends --no-suggests --no-conflicts --no-breaks --no-replaces --no-enhances --no-pre-depends -o APT::Architectures="amd64" "$PACKAGE" | grep -E "^\w"  | sort -u)
        mapfile -t PACKAGE_AND_DEPENDS < <(apt-cache policy "${ALL_PACKAGE_AND_DEPENDS[@]}" | awk '/^[a-zA-Z]/ {pkg=$1} /\*\*\*/ {sub(":", "", pkg); print pkg}')
        mapfile -t LINES < <(apt-get install -o Dir::Cache::archives=/dev/null --print-uris --reinstall "${PACKAGE_AND_DEPENDS[@]}" 2>&1 | grep "'http")

        FILENAMES=()
        for LINE in "${LINES[@]}"; do

            URI=$(echo "$LINE" | sed "s/^'\([^']*\)'.*/\1/")
            DECODED_FILENAME=$(echo "$LINE" | sed "s/.*'[^']*' \([^ ]*\.deb\) .*/\1/")
            EXPECTED_SIZE=$(echo "$LINE" | cut -d' ' -f3)

            FILEPATH="$ABSOLUTE_BASE_PATH/$DECODED_FILENAME"

            if [[ -f "$FILEPATH" && "$EXPECTED_SIZE" == $(stat -c%s "$FILEPATH" 2>/dev/null || wc -c < "$FILEPATH") ]]; then
                echo "⬇️ [$PACKAGE] DOWNLOADED     $DECODED_FILENAME"
            else
                echo "⬇️ [$PACKAGE] DOWNLOADING    $DECODED_FILENAME"
                wget -O "$FILEPATH" "$URI"
            fi

            if [[ ! -f "$FILEPATH" ]]; then
                error "🔴 [$PACKAGE] ($DECODED_FILENAME) IS NOT EXIST: $URI"
            elif [[ "$EXPECTED_SIZE" != $(stat -c%s "$FILEPATH" 2>/dev/null || wc -c < "$FILEPATH") ]]; then
                error "🔴 [$PACKAGE] ($DECODED_FILENAME) FILE SIZE MISMATCH: $URI"
            else
            	FILENAMES+=("$DECODED_FILENAME")
            fi

        done
        MANIFESTPATH="$ABSOLUTE_BASE_PATH/${PACKAGE}.txt"
        echo "📄 [$PACKAGE] WRITE MANIFEST $MANIFESTPATH"
        printf '%s\n' "${FILENAMES[@]}" > "$MANIFESTPATH"
        echo
    done
    change_owner "$ABSOLUTE_BASE_PATH"

elif [[ "$COMMAND" == "install" ]]; then
    for PACKAGE in "$@"; do
        LISTFILE="$ABSOLUTE_BASE_PATH/${PACKAGE}.txt"
        if [[ ! -f "$LISTFILE" ]]; then
            error "🔴 [$PACKAGE] NOT FOUND"
        fi
        DEB_FILES=()
        while IFS= read -r LINE; do
            [[ -z "$LINE" ]] && continue
            FILEPATH="$ABSOLUTE_BASE_PATH/$LINE"
            if [[ ! -f "$FILEPATH" ]]; then
                error "🔴 [$PACKAGE] MISSING DEB FILE ($LINE)"
            fi
            DEB_FILES+=("$FILEPATH")
        done < "$LISTFILE"

        if [[ ${#DEB_FILES[@]} -eq 0 ]]; then
            error "🔴 [$PACKAGE] NO PACKAGES TO INSTALL"
        fi

        dpkg -i "${DEB_FILES[@]}" || error "🔴 [$PACKAGE] FAILED TO INSTALL"  -o APT::Architectures="amd64"
    done

elif [[ "$COMMAND" == "cleanup" ]]; then

    declare -A VALID_DEBS
    for MANIFEST_FILE in "$ABSOLUTE_BASE_PATH"/*.txt; do
        while IFS= read -r DEB_FILE; do
            [[ -z "$DEB_FILE" ]] && continue
            VALID_DEBS["$DEB_FILE"]=1
        done < "$MANIFEST_FILE"
    done
    for DEB_FILE in "$ABSOLUTE_BASE_PATH"/*.deb; do
        [[ ! -f "$DEB_FILE" ]] && continue
        FILENAME=$(basename "$DEB_FILE")
        if [[ -z "${VALID_DEBS[$FILENAME]}" ]]; then
            echo "🗑️ REMOVE ($FILENAME)"
            rm -f "$DEB_FILE"
        fi
    done

else
    help
fi