#!/bin/sh
set -e

TESTDIR="$(readlink -f "$(dirname "$0")")"
. "$TESTDIR/framework"
setupenvironment

DPKG_PERL_VERSION="$(perl -e 'use Dpkg; print "$Dpkg::PROGVERSION";')"
DPKG_OUTPUT_SORT='sort -u'
if dpkg --compare-versions "$DPKG_PERL_VERSION" '>=' '1.21.4~'; then
	DPKG_OUTPUT_SORT='sort'
fi

dpkg_field_ordered_list() {
	local FIELDS="$(perl -e "
use Dpkg::Control;
use Dpkg::Control::Fields;
foreach \$f (field_ordered_list(${1})) {
	print \"\$f\\n\";
}" | $DPKG_OUTPUT_SORT )"
	if [ -z "$FIELDS" ]; then
		msgfail 'Could not get fields via libdpkg-perl'
	fi
	echo "$FIELDS"
}

comparelsts() {
	local DIFFOUTPUT="$(diff -u apt.lst dpkg.lst || true)"
	if echo "$DIFFOUTPUT" | grep -q '^+[^+]'; then
		echo
		echo "$DIFFOUTPUT" | grep '^[+-][^+-]'
		msgfail
	else
		msgpass
	fi
}

grep -v '^#' "${SOURCEDIRECTORY}/apt-pkg/tagfile-keys.list" > tagfile-keys.list
# Hardcoding this is a bit silly, but it might help preventing issues…
msgtest 'File is append only: do not sort, remove or insert keys in' 'tagfile-keys.list'
testequal --nomsg 'Version' sed '72q;d' tagfile-keys.list

msgtest 'List has fewer entries than pkgTagSection buckets' 'tagfile-keys.list'
ENTRIES_LIST="$(wc -l tagfile-keys.list | cut -d' ' -f 1)"
ENTRIES_BUCKET="$(grep -m 1 'AlphaIndexes\[' "${SOURCEDIRECTORY}/apt-pkg/tagfile.h" | sed -e 's#.*\[\([0-9]\+\)\].*#\1#')"
if test $ENTRIES_LIST -lt $ENTRIES_BUCKET; then
	msgpass
else
	echo
	echo "List has $ENTRIES_LIST entries, but pkgTagSection can only store $ENTRIES_BUCKET as AlphaIndexes"
	msgfail
fi

msgtest 'Check for duplicates in' 'tagfile-keys.list'
sort tagfile-keys.list > apt.lst
testempty --nomsg uniq --repeated 'apt.lst'

msgtest 'Check that apt knows all fields it orders' 'itself'
grep -v "// NO_KEY: " "${SOURCEDIRECTORY}/apt-pkg/tagfile-order.c" | sed -ne 's#^   "\(.*\)",.*$#\1#p' | sort -u > dpkg.lst
comparelsts

msgtest 'Check tagfile-keys.list does not contain' 'obsoleted and internal fields'
grep "// NO_KEY: " "${SOURCEDIRECTORY}/apt-pkg/tagfile-order.c" | sed -ne 's#^   "\(.*\)",.*$#\1#p' > obsolete.lst
sed -n -e's#^ *// *"\(.*\)",.*$#\1#p' "${SOURCEDIRECTORY}/apt-pkg/tagfile-order.c" >> obsolete.lst
sort -u obsolete.lst > obsolete-sorted.lst
sort obsolete-sorted.lst tagfile-keys.list > obsolete-keys.lst
testempty --nomsg uniq --repeat 'obsolete-keys.lst'

msgtest 'Check that apt knows all fields dpkg orders in' 'Packages'
dpkg_field_ordered_list 'CTRL_INDEX_PKG' > dpkg.lst
sed -ne 's#^   "\(.*\)",.*$#\1#p' "${SOURCEDIRECTORY}/apt-pkg/tagfile-order.c" | sed -n '/^Package$/,/^Package$/ p' | head -n -1 | sort > apt.lst
comparelsts

msgtest 'Check that apt knows all fields dpkg orders in' 'status'
dpkg_field_ordered_list 'CTRL_FILE_STATUS' > dpkg.lst
comparelsts

msgtest 'Check that apt knows all fields dpkg orders in' 'DEBIAN/control'
dpkg_field_ordered_list 'CTRL_PKG_DEB' > dpkg.lst
comparelsts

msgtest 'Check that apt knows all fields dpkg orders in' 'Sources'
dpkg_field_ordered_list 'CTRL_INDEX_SRC' > dpkg.lst
echo 'Package' > apt.tmp
sed -ne 's#^   "\(.*\)",.*$#\1#p' "${SOURCEDIRECTORY}/apt-pkg/tagfile-order.c" | sed '/^Package$/,/^Package$/ d' >> apt.tmp
sort -u apt.tmp > apt.lst
comparelsts

msgtest 'Check that apt knows all fields dpkg orders in' 'dsc'
dpkg_field_ordered_list 'CTRL_PKG_SRC' > dpkg.lst
comparelsts

DPKG_SOURCE_PARSE_C="${DPKG_SOURCE_DIRECTORY}/lib/dpkg/parse.c"
msgtest 'Compare our knowledge with the source code of' 'dpkg'
if [ -z "$DPKG_SOURCE_DIRECTORY" ]; then
	msgskip 'source not provided'
elif [ ! -r "$DPKG_SOURCE_PARSE_C" ]; then
	msgfail 'source not found'
else
	msgpass
	msgtest 'Check that apt knows about all fields' 'dpkg parses'
	sed -n 's#^.*FIELD("\(.*\)").*$#\1#p' "${DPKG_SOURCE_PARSE_C}" | sort -u > dpkg.lst
	sed -n -e's#^ *// *"#   "#' -e 's#^   "\(.*\)",.*$#\1#p' "${SOURCEDIRECTORY}/apt-pkg/tagfile-order.c" | sed -n '/^Package$/,/^Package$/ p' | head -n -1 | sort > apt.lst
	comparelsts
fi

DAK_SOURCE_METADATAKEYS="${DAK_SOURCE_DIRECTORY}/setup/core-init.d/080_metadatakeys"
msgtest 'Compare our knowledge with the source code of' 'dak'
if [ -z "$DAK_SOURCE_DIRECTORY" ]; then
	msgskip 'source not provided'
elif [ ! -r "$DAK_SOURCE_METADATAKEYS" ]; then
	msgfail 'source not found'
else
	msgpass
	msgtest 'Check that apt knows about all fields' 'dak knows'
	# dak mixes both, so we can only check with the mixed one as well
	sed -ne "s#^.* VALUES ('\(.*\)', \(.*\)).*\$#\1 \2#p" "${DAK_SOURCE_METADATAKEYS}" | cut -d ' ' -f 1 | sort -u > dpkg.lst
	sed -ne 's#^   "\(.*\)",.*$#\1#p' "${SOURCEDIRECTORY}/apt-pkg/tagfile-order.c" | sort -u > apt.lst
	comparelsts
fi