ITP generator for elementary software

#!/bin/bash

if [ -z "$1" ]; then
    echo "Usage: $0 lp:~elementary-os/SOMEPROJECT/deb-packaging"
    exit 1
fi

set -e

project_name=$(echo "$1" | cut -d '/' -f 2)

target_dir="$(mktemp -d)"
bzr export "$target_dir" "$1"
cd "$target_dir"

package_name=$(grep 'Source:' debian/control | cut -d ':' -f 2-)
description=$(grep -m 1 'Description:' debian/control | cut -d ':' -f 2-)
license=$(grep -m 1 'License:' debian/copyright | cut -d ':' -f 2-)
version=$(grep -m 1 '(' debian/changelog | cut -d '(' -f 2- | cut -d ')' -f 1 | cut -d '-' -f 1)

msg_tempfile="$(mktemp)"

echo "Package: wnpp
Owner: Sergey \"Shnatsel\" Davidoff <sergey@elementaryos.org>
Severity: wishlist

* Package name    : $package_name
  Version         : $version
  Upstream Author : elementary Developers
* URL             : https://launchpad.net/$project_name
* License         : $license
  Programming Lang: Vala
  Description     : $description

This is a part of my Google Summer of Code project on packaging elementary software for Debian, see https://wiki.debian.org/SummerOfCode2014/Projects/PackageElementarySoftware for more information.
" > "$msg_tempfile"

nano "$msg_tempfile"

echo -n "Submit the ITP to Debian bug tracking system? [y/N]: "
read
if ( echo "$REPLY" | grep -q -i 'y' ); then
    cat "$msg_tempfile" | mail -s "ITP: $package_name -- $description" submit@bugs.debian.org
else
    echo "Not submitting. The generated text is available at $msg_tempfile"
fi