#!/bin/bash

set -e

usage() {
    echo "usage: dcp-update-apt PACKAGE"
}

getaptsrc() {
    mkdir "apt-tmp"
    (cd "apt-tmp"; apt-get source "$1") || false
    
    sdir=
    for f in "apt-tmp"/*; do
	if [ -d "$f" ]; then
	    if [ -z "$sdir" ]; then
		sdir="$f"
	    else
		echo "dcp-update-apt: got more than one directory from apt-get; cannot continue" >&2
		exit 1
	    fi
	fi
    done
    if [ -z "$sdir" ]; then
	echo "dcp-update-apt: could not find any source directory" >&2
	exit 1
    fi
    mv "$sdir" "src"
    rm -rf "apt-tmp"

    git add src
}

if [ $# -lt 1 ]; then
    usage >&2
    exit 1
fi

git rm --quiet -r src
getaptsrc "$1"
git commit -q -m "Updated from upstream" || true