Get debian package information through parsing Sources.gz

get_debian_package_info

#!/bin/bash

_pkgsite="http://packages.linuxdeepin.com"
pkgsite="${_pkgsite}/deepin"
deepin_debian_source="${pkgsite}/dists/trusty/main/source/Sources.gz"
tmp_source_file="/tmp/sources"

download_debian_source() {
    curl --retry 3 --retry-delay 3 -o "${tmp_source_file}".gz "${deepin_debian_source}"
    gunzip -f "${tmp_source_file}".gz
}

grep_block() {
    local keyword="$1"; shift
    local files=$@
    awk -v keyword="${keyword}" 'BEGIN{RS="\n\n"} $0 ~ keyword{print ""; print; n++}' $files
}

# $pkg_version, $pkg_directory, $pkg_sha256sum
get_pkg_info() {
    local pkgname=$1
    pkg_info=$(grep_block "Package: ${pkgname}" "${tmp_source_file}")
    pkg_version=$(echo "$pkg_info" | grep -m1 "^Version:" | awk '{print $2}')
    pkg_directory=$(echo "$pkg_info" | grep -m1 "^Directory:" | awk '{print $2}')
    pkg_file="${pkgname}_${pkg_version}.tar.gz"
    pkg_fileurl="${pkgsite}/${pkg_directory}/${pkg_file}"
    pkg_sha256sum=$(echo "$pkg_info" | awk 'BEGIN{RS="Checksums-Sha256:"}{if(NR==2){print}}' | grep "${pkg_file}" | awk '{print $1}')

    # fix package version
    pkg_version_fixed="${pkg_version%~*}"
    pkg_version_fixed="${pkg_version_fixed/-/_}"

    echo "pkg_version: ${pkg_version}"
    echo "pkg_version_fixed: ${pkg_version_fixed}"
    echo "pkg_directory: ${pkg_directory}"
    echo "pkg_file: ${pkg_file}"
    echo "pkg_fileurl: ${pkg_fileurl}"
    echo "pkg_sha256sum: ${pkg_sha256sum}"
}

download_debian_source
get_pkg_info "$1"

Run get_debian_package_info startdde will print:

pkg_version: 0.1-20140624165058~1d45d395a1
pkg_version_fixed: 0.1_20140624165058
pkg_directory: pool/main/s/startdde
pkg_file: startdde_0.1-20140624165058~1d45d395a1.tar.gz
pkg_fileurl: http://packages.linuxdeepin.com/deepin/pool/main/s/startdde/startdde_0.1-20140624165058~1d45d395a1.tar.gz
pkg_sha256sum: 3704d86de79074a4146d65cab17b062a080af472d6f9ee262f9a06c6b8ef6efe

Full example to see https://github.com/fasheng/arch-deepin/blob/master/aur/update.sh