Unbork pacman - correct time, update certificates, refresh keyring, reduce package cache, upgrade pacman and AUR helper

fixPacman.sh

#!/bin/bash

function updateSystemClock() {
    # timedatectl timesync-status; echo
    _log stdout 'Synchronizing clock'
    sudo systemctl restart systemd-timesyncd || return 1
    sleep 2; echo
    # systemctl status systemd-timesyncd; echo
    journalctl --lines=1 -xru systemd-timesyncd; echo
}

function upgradeAurHelper() {
    _log stdout 'Upgrading AUR helper'
    # sudo pacman -S "${PACMAN_ARGS[@]}" "$SYS_PACMAN_AUR_HELPER"
    _AUR_HELPER_BUILD_PATH="$HOME/pkg/${SYS_PACMAN_AUR_HELPER}"
    rm "${_AUR_HELPER_BUILD_PATH}.tar.gz" "${_AUR_HELPER_BUILD_PATH}/*" 2>/dev/null
    cd "$_AUR_HELPER_BUILD_PATH" || return 1
    wget "https://aur.archlinux.org/cgit/aur.git/snapshot/${SYS_PACMAN_AUR_HELPER}.tar.gz"
    tar -xzf "${_AUR_HELPER_BUILD_PATH}.tar.gz" || return 1
    makepkg -s || return 1; echo
    sudo pacman -U ${SYS_PACMAN_AUR_HELPER}*.pkg.tar.zst; echo
    cd - || return 1
}

function reloadPacmanKeyring() {
    ## Upgrade management-related packages
    _log stdout 'Upgrading key management packages'
    sudo pacman -S "${PACMAN_ARGS[@]}" gpgme ca-certificates || return 1
    sudo pacman -S "${PACMAN_ARGS[@]}" archlinux-keyring || return 1; echo

    ## Update and refresh key management database
    _log stdout 'Rebuilding repository key database'
    sudo pacman-key --init || return 1
    sudo pacman-key --populate archlinux || return 1
    # sudo pacman-key --refresh-keys
}

function fixpacman () {
    updateSystemClock || return 1; echo

    _log stdout 'Pruning package cache'
    sudo paccache -k3 -r || return 1; echo

    # local PACMAN_ARGS=('--needed' '--noprogressbar' '--noconfirm' '--color=never' '--quiet')
    local PACMAN_ARGS=('--needed' '--noconfirm' '--color=always' '--quiet')
    _log stdout 'Refreshing package index'
    sudo pacman -Sy "${PACMAN_ARGS[@]}" || return 1; echo

    _log stdout 'Upgrading pacman'
    # pacman --version; echo
    sudo pacman -S "${PACMAN_ARGS[@]}" pacman || return 1; echo

    reloadPacmanKeyring || return 1

    upgradeAurHelper || return 1

    _log stdout 'Upgrading AUR-based key management packages'
    "$SYS_PACMAN_AUR_HELPER" -S debian-keyring || return 1
}; export fixpacman