A small script for arch linux which builds and installs "pacaur" automatically

install-pacaur.sh

#!/usr/bin/env bash

# The MIT License (MIT)
#
# Copyright (c) 2015 Stefan Tatschner
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.

buildroot="$(mktemp -d)"

# Ask for user passwort once, see sudo(8).
sudo -v

# Fetch Dave Reisner's key to be able to verify cower.
gpg --keyserver hkp://pool.sks-keyservers.net --recv-keys 487EACC08557AD082088DABA1EB2638FF56C0C53

# Make sure we can even build packages on arch linux.
sudo pacman -S --needed --noconfirm base-devel curl

mkdir -p "${buildroot}"
mkdir "${buildroot}/cower" "${buildroot}/pacaur"

cd "${buildroot}/cower" || exit 1
curl -L https://aur.archlinux.org/cgit/aur.git/plain/PKGBUILD?h=cower > PKGBUILD
makepkg --syncdeps --install --noconfirm

cd "${buildroot}/pacaur" || exit 1
curl -L https://aur.archlinux.org/cgit/aur.git/plain/PKGBUILD?h=pacaur > PKGBUILD
makepkg --syncdeps --install --noconfirm

rm -rf "${buildroot}"