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, array] (NOTE: only the first value will be used)
# - 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 code 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'
arch='all'
maintainer="$LOGNAME <$LOGNAME@$HOSTNAME>"
package() {
	true
}

. "$PKGBUILD"

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

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

	package() {
		true
	}
fi

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

# https://www.debian.org/doc/debian-policy/ch-controlfields.html
mkdir -p "$pkgdir/DEBIAN"
cat << EOF | sed 's/ *$//' | 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