#! /bin/bash

# Script checks whether the versions of build dependencies of D-I in testing
# and unstable match.
# If files from a build dependency are embedded in D-I images, the version
# that is used to build it must be included in the release.
#
# If called with 'all' the script will list all build dependencies, if not it
# will only list those for which the versions do not match.
#
# The script should be run from the installer directory in D-I SVN.

# !!! WARNING !!!
# The output of the script is only really reliable if done at the same time
# as an upload of d-i. Later uploads of build dependencies to unstable are
# after all not relevant.
# Do keep in mind that differences between architectures are possible, both
# regarding which versions of packages are in unstable and at which exact
# time d-i is built on the various buildds.

# TODO
# - convert list to unique source packages and check those instead

ignore_m68k="amiboot atari-bootstrap emile emile-bootblocks m68k-vme-tftplilo vmelilo"
safe="apt apt-utils bc cpio cramfsprogs debhelper docbook-xsl dosfstools e2fsprogs \
      upx-ucl tofrodos wget dctrl-tools"

get_version() {
	local ver

	# IIRC packages are listed in ascending order on version, so take last
	ver=$(rmadison -s $2 $1 | tail -n1 | awk '{print $3}')
	[ "$ver" ] && echo "$ver" || echo "N/A"
}

PRINT_ALL=
if [ "$1" = all ]; then
	PRINT_ALL=1
fi

build_deps="$(sed -nr '/^#[[:space:]]*-/ s/[^-]*- ([^ ]*).*/\1/p' debian/control | sort -u)"

for p in $build_deps; do
	# m68k is not a release arch, so ignore m68k-only dependencies
	if echo " $ignore_m68k " | grep -q " $p "; then
		continue
	fi

	# glibc-pic is a pseudo-package, check the source package instead
	if [ "$p" = glibc-pic ]; then
		p=glibc
	fi

	tver=$(get_version $p testing)
	uver=$(get_version $p unstable)

	mark=
	if [ "$tver" != "$uver" ]; then
		if echo " $safe " | grep -q " $p "; then
			mark="-"
		else
			mark="*"
		fi
	else
		[ "$PRINT_ALL" ] || continue
	fi

	printf "%-25s %20s %20s   %s\n" "$p" "$tver" "$uver" "$mark"
done