MSYS2 pacman repos mirroring script

msys2-mirror.sh

#!/usr/bin/bash

ROOT="$(pwd)"

dl() {
    local cookie="/tmp/pacman-mirror-cookie.txt"
    
    touch "${cookie}"
    
    local file
    for file in "${@}"
    do
        wget --load-cookies="${cookie}" --save-cookies="${cookie}" --keep-session-cookies -nv -N "${file}"
    done
}

verify() {
    local file="${1}"
    
    gpg --homedir "${ROOT}" --verify "${file}".sig "${file}" 2> /dev/null
}

mirror() {
    local dir="${1}"
    local db="${2}"
    local url="${3}"
    local srcurl="${4}"
    
    mkdir -p "${dir}"
    pushd "${dir}" > /dev/null
    
    # download DB file
    dl "${url}"/"${db}".db{,.sig}
    verify "${db}".db || echo "Problem downloading ${db}.db!"
    
    # download missing packages
    local pkg srcpkg
    bsdtar -xOf "${db}".db "*/desc" | grep -A 1 %FILENAME% | sed -e '/^%FILENAME%$/d' -e '/^--$/d' | while read pkg
    do
        srcpkg="${pkg%-*.pkg.tar.*}".src.tar.gz
        verify "${pkg}" || dl "${url}"/"${pkg}"{,.sig}
        verify "${srcpkg}" || dl "${srcurl}"/"${srcpkg}"{,.sig}
    done
    
    popd > /dev/null
}

dl "https://raw.githubusercontent.com/Alexpux/MSYS2-keyring/master/msys2.gpg"
gpg --homedir . --import msys2.gpg

base="http://downloads.sourceforge.net/project/msys2/REPOS"

mirror mingw32 mingw32 "${base}/MINGW/i686" "${base}/MINGW/Sources"
mirror mingw64 mingw64 "${base}/MINGW/x86_64" "${base}/MINGW/Sources"
mirror msys2-i686 msys "${base}/MSYS2/i686" "${base}/MSYS2/Sources"
mirror msys2-x86_64 msys "${base}/MSYS2/x86_64" "${base}/MSYS2/Sources"