build.sh

#! /usr/bin/env bash
#
# Build Debian package in a Docker container
#

set -e

if test $# -eq 0; then
    for distro in debian:stretch debian:buster ubuntu:xenial ubuntu:bionic; do
        $0 $distro
    done
    exit 0
fi

# Get build platform as 1st argument, and collect project metadata
image="${1:?You MUST provide a docker image name}"; shift
dist_id=${image%%:*}
codename=${image#*:}
pypi_name="$(./setup.py --name)"
pypi_version="$(./setup.py --version)"
pkgname="$(dh_listpackages)"
tag=$pypi_name-$dist_id-$codename

build_opts=(
    -f Dockerfile.build
    --tag $tag
    --build-arg "DIST_ID=$dist_id"
    --build-arg "CODENAME=$codename"
    --build-arg "PKGNAME=$pkgname"
)

# Build in Docker container, save results, and show package info
rm -f dist/${pkgname}?*${pypi_version//./?}*${codename}*.*
docker build "${build_opts[@]}" "$@" .
mkdir -p dist
docker run --rm $tag tar -C /dpkg -c . | tar -C dist -x
ls -lh dist/${pkgname}?*${pypi_version//./?}*${codename}*.*