makepkg for debian

makepkg

#!/bin/bash -e

# This script is a wrapper around dpkg-deb that supports a subset of arch
# linux' PKGBUILD format. This means that it can be used to build debian
# (meta-)packages from a single file.
#
# PKGBUILD files are written in bash and can define the following variables:
#
# - pkgname [required]
# - pkgver
# - pkgdesc
# - maintainer
# - arch [required]
# - url
# - depends [array]
# - optdepends [array]
# - provides [array]
# - conflicts [array]
# - makedepends [array]
#
# In addition to that, the file can define the functions `package` for
# preparing and installing the files. It has access to the variables
# `$srcdir` which is the path to a temporary directory and `$pkgdir`
# which is the path to which the files must be installed.
#
# Inspired by the following tools:
#
# - http://checkinstall.izto.org/
# - https://github.com/hoffa/debpack
# - https://wiki.archlinux.org/index.php/Pkgbuild

if [ "$(id -u)" -eq 0 ]; then
	echo "This script should not be run as root!"
	exit 1
fi

install=
builddeps=
PKGBUILD='PKGBUILD'

while [ $# -gt 0 ]; do
	case "$1" in
		-i) install=true; shift;;
		-m) builddeps=true; shift;;
		-h) echo "Usage: makepkg [-i] [-m] [PKGBUILD]"; exit 1;;
		*) PKGBUILD="$1"; shift;;
	esac
done

join() {
	local IFS=",";
	echo "$*";
}

# define defaults
pkgver='0.0.0'
pkgdesc=''
maintainer="$USER <$USER@$HOSTNAME>"
arch='all'
url=''
depends=()
optdepends=()
provides=()
conflicts=()
package() {
	true
}

. "$PKGBUILD"

if [ "$builddeps" = true ]; then
	if [ -z "$makedepends" ]; then
		echo "no build dependencies necessary" >&2
		exit 1
	fi

	depends=()
	optdepends=()
	provides=()
	conflicts=()
	pkgname="$pkgname-deps"
	arch='all'
	depends=("${makedepends[@]}")

	package() {
		true
	}
fi

srcdir="$(mktemp -d)"
pkgdir="$(mktemp -d)"
trap "rm -rf -- '$srcdir' '$pkgdir'" EXIT
(package)

# https://www.debian.org/doc/debian-policy/ch-controlfields.html
mkdir -p "$pkgdir/DEBIAN"
cat << EOF | grep ': .' > "$pkgdir/DEBIAN/control"
Package: $pkgname
Priority: optional
Section: checkinstall
Installed-Size: $(du -s "$pkgdir" | awk '{print $1}')
Maintainer: $maintainer
Architecture: $arch
Version: $pkgver
Depends: $(join "${depends[@]}")
Recommends: $(join "${optdepends[@]}")
Provides: $(join "${provides[@]}")
Conflicts: $(join "${conflicts[@]}")
Description: $pkgdesc
Homepage: $url
EOF

if ! find "$pkgdir" -type f | sed "s|^$pkgdir||" | grep '^/etc/' > "$pkgdir/DEBIAN/conffiles"; then
	rm "$pkgdir/DEBIAN/conffiles"
fi

cat "$pkgdir/DEBIAN/control"

fakeroot dpkg-deb --build "$pkgdir" "${pkgname}_${pkgver}_${arch}.deb"

if [ "$install" = true ]; then
	sudo dpkg -i "${pkgname}_${pkgver}_${arch}.deb"
fi