#!/bin/sh
set -e

cd "$(readlink -f $(dirname $0))"

if [ -n "${GBP_BUILD_DIR}" ]; then
   cd "$GBP_BUILD_DIR"
fi

VERSION=$(dpkg-parsechangelog | sed -n -e '/^Version:/s/^Version: //p')
DISTRIBUTION=$(dpkg-parsechangelog | sed -n -e '/^Distribution:/s/^Distribution: //p')

LIBAPTPKGVERSION="$(awk -v ORS='.' '/^\#define APT_PKG_M/ {print $3}' apt-pkg/contrib/macros.h | sed 's/\.$//')"
LIBAPTINSTVERSION="$(egrep '^MAJOR=' apt-inst/makefile |cut -d '=' -f 2)"

librarysymbolsfromfile() {
	local MISSING="$(grep '^+#MISSING' "$1")"
	echo '=== Missing optional symbols:'
	echo -n "$MISSING" | grep '|optional=' || true
	echo '=== Missing required symbols:'
	echo -n "$MISSING" | grep -v '|optional=' || true
	echo '=== New symbols:'
	grep '^+ ' "$1" | cut -d' ' -f 2 | cut -d'@' -f 1 | c++filt | while read line; do
		echo " (c++)\"${line}@Base\" $VERSION"
	done | sort -u
}

if [ "$1" = 'pre-export' ]; then
	libraryversioncheck() {
		local LIBRARY="$1"
		local VERSION="$2"
		if [ ! -e "debian/${LIBRARY}${VERSION}.symbols" ]; then
		   echo >&2 "Library ${LIBRARY} in version ${VERSION} has no symbols file! (maybe forgot to rename?)"
		   exit 1
		fi
		if [ "$(head -n1 "debian/${LIBRARY}${VERSION}.symbols")" != "${LIBRARY}.so.${VERSION} ${LIBRARY}${VERSION} #MINVER#" ]; then
		   echo >&2 "Library ${LIBRARY}${VERSION} has incorrect version in symbol header! (»$(head -n1 "debian/${LIBRARY}${VERSION}.symbols")«)"
		   exit 2
		fi
	}

	libraryversioncheck 'libapt-pkg' "$LIBAPTPKGVERSION"
	libraryversioncheck 'libapt-inst' "$LIBAPTINSTVERSION"


	if [ "$DISTRIBUTION" = 'sid' ]; then
		echo >&2 '»sid« is not a valid distribution. Replace it with »unstable« for you'
		sed -i -e 's/) sid; urgency=/) unstable; urgency=/' debian/changelog
		DISTRIBUTION='unstable'
	elif [ "$DISTRIBUTION" = 'UNRELEASED' ]; then
		echo >&2 'WARNING: Remember to change to a valid distribution for release'
		VERSION="$VERSION~$(date +%Y%m%d)"
	fi

	if [ "$(date +%Y-%m-%d)" != "$(grep --max-count=1 '^"POT-Creation-Date: .*\n"$' po/apt-all.pot | cut -d' ' -f 2)" -o \
	     "$(date +%Y-%m-%d)" != "$(grep --max-count=1 '^"POT-Creation-Date: .*\n"$' doc/po/apt-doc.pot | cut -d' ' -f 2)" ]; then
		echo >&2 'POT files are not up-to-date. Execute »make update-po« for you…'
		make update-po
	fi

	sed -i -e "s/^PACKAGE_VERSION=\".*\"$/PACKAGE_VERSION=\"${VERSION}\"/" configure.ac
	sed -i -e "s/^<!ENTITY apt-product-version \".*\">$/<!ENTITY apt-product-version \"${VERSION}\">/" doc/apt-verbatim.ent
elif [ "$1" = 'post-build' ]; then
	if [ "$DISTRIBUTION" != "UNRELEASED" ]; then
		echo >&2 "REMEMBER: Tag this release with »git tag ${VERSION}« if you are satisfied"
	else
		echo >&2 'REMEMBER: Change to a valid distribution before release'
	fi

	dpkg-checkbuilddeps -d 'libxml2-utils'

	HEADERBLUEPRINT="$(mktemp)"
	sed -n '1,/^$/p' doc/apt.8.xml > "$HEADERBLUEPRINT"
	find doc -mindepth 1 -maxdepth 1 -type f -name '*.xml' | while read FILE; do
		if ! sed -n '1,/^$/p' "$FILE" | cmp "$HEADERBLUEPRINT" - >/dev/null 2>&1; then
			echo >&2 "WARNING: Manpage $FILE has not the usual header! (see diff below)"
			sed -n '1,/^$/p' "$FILE" | diff -u "$HEADERBLUEPRINT" - || true
		fi
	done
	sed -n '1,/^$/p' doc/guide.dbk > "$HEADERBLUEPRINT"
	find doc -mindepth 1 -maxdepth 1 -type f -name '*.dbk' | while read FILE; do
		if ! sed -n '1,/^$/p' "$FILE" | cmp "$HEADERBLUEPRINT" - >/dev/null 2>&1; then
			echo >&2 "WARNING: Documentation $FILE has not the usual header (see diff below)!"
			sed -n '1,/^$/p' "$FILE" | diff -u "$HEADERBLUEPRINT" - || true
		fi
	done
	rm "$HEADERBLUEPRINT"

	# check the manpages with each vendor for vendor-specific errors…
	find vendor -mindepth 1 -maxdepth 1 -type d | cut -d'/' -f 2 | while read DISTRO; do
		ln -sf ../vendor/${DISTRO}/apt-vendor.ent doc
		if ! xmllint --nonet --valid --noout $(find doc/ -maxdepth 1 -name '*.xml'); then
			echo >&2 "WARNING: original docbook manpages have errors with vendor ${DISTRO}!"
		fi
	done
	# lets assume we will always have a german manpage translation
	if [ -e 'doc/de/' ]; then
		# … but check the translations only with one vendor for translation-specific errors
		if ! xmllint --nonet --valid --noout $(find doc/ -mindepth 2 -maxdepth 2 -name '*.xml'); then
			echo >&2 "WARNING: translated docbook manpages have errors!"
		fi
	else
		echo >&2 "ERROR: translated manpages need to be build before they can be checked!"
	fi
	rm -f doc/apt-vendor.ent

elif [ "$1" = 'library' ]; then
	librarysymbols() {
		echo "Checking $1 in version $2"
		local tmpfile=$(mktemp)
		dpkg-gensymbols -p${1}${2} -ebuild/bin/${1}.so.${2} -Idebian/${1}${2}.symbols -O/dev/null 2> /dev/null > $tmpfile || true
		librarysymbolsfromfile "$tmpfile"
		rm -f $tmpfile
	}
	librarysymbols 'libapt-pkg' "${LIBAPTPKGVERSION}"
	echo
	librarysymbols 'libapt-inst' "${LIBAPTINSTVERSION}"
elif [ "$1" = 'buildlog' ]; then
	while [ -n "$2" ]; do
		librarysymbolsfromfile "$2"
		shift
	done
elif [ "$1" = 'travis-ci' ]; then
	apt-get install -q --no-install-recommends $(sed -n -e '/^Build-Depends: /,/^Build-Depends-Indep: / {p}' debian/control | sed -e 's#([^)]*)##g' -e 's#^Build-Depends\(-Indep\)\?: ##' | tr -d ',')
	apt-get install -q --no-install-recommends $(sed -n 's#^Depends: .*@, \(.*\)$#\1#p' debian/tests/control | tr -d ',')
elif [ "$1" = 'coverage' ]; then
	DIR="${2:-./coverage}"
	git clean -dfX # remove ignored build artefacts for a clean start
	make CFLAGS+='--coverage' CXXFLAGS+='--coverage'
	LCOVRC='--rc geninfo_checksum=1 --rc lcov_branch_coverage=1'
	mkdir "$DIR"
	lcov --no-external --directory . --capture --initial --output-file "${DIR}/apt.coverage.init" ${LCOVRC}
	make test
	./test/integration/run-tests -q
	lcov --no-external --directory . --capture --output-file "${DIR}/apt.coverage.run" ${LCOVRC}
	lcov -a "${DIR}/apt.coverage.init" -a "${DIR}/apt.coverage.run"  -o "${DIR}/apt.coverage.total" ${LCOVRC}
	cp "${DIR}/apt.coverage.total" "${DIR}/apt.coverage.fixed"
	rewritefile() {
		file="$1"
		shift
		name="$(basename "$file")"
		while [ -n "$1" ]; do
			if [ -r "$1/$name" ]; then
				sed -i "s#$file#$1/$name#" "${DIR}/apt.coverage.fixed"
				break
			fi
			shift
		done
		if [ -z "$1" ]; then
			echo >&2 "Coverage data captured for unknown file $file"
		fi
	}
	grep 'build/include/' "${DIR}/apt.coverage.fixed" | sed "s#^SF:$(pwd)/##" | while read file; do
		rewritefile "$file" 'apt-pkg' 'apt-pkg/deb' 'apt-pkg/edsp' 'apt-pkg/contrib' \
		   'apt-inst' 'apt-inst/deb' 'apt-inst/contrib' 'apt-private'
	done
	genhtml --output-directory "${DIR}" "${DIR}/apt.coverage.fixed" ${LCOVRC}
else
	echo >&1 "Usage:\t$0 pre-export
\t$0 post-build

If you use »git buildpackage« you can leave these alone as they will
be run at the right places auto-magically. Otherwise you should use
»pre-export« to update po and pot files as well as version numbering.
»post-build« can be used to run some more or less useful checks later on.

\t$0 library
\t$0 buildlog filename…

»library« and »buildlog« aren't run automatically but can be useful for
maintaining the (more or less experimental) symbols files we provide.
»library« displays the diff between advertised symbols and the once provided
by the libraries, while »buildlog« extracts this diff from the buildlogs.
Both will format the diff properly.

\t$0 travis-ci
\t$0 coverage [output-dir]

»travis-ci« is a shortcut to install all build- as well as test-dependencies
used by .travis.yml.
»coverage« does a clean build with the right flags for coverage reporting,
runs all tests and generates a html report in the end.
"

fi