package-deb

#!/bin/sh
#
# Build Debian and Ubuntu packages from a tarball.
#
# This is the script that our Jenkins/CI system runs. Yes, it is a bit messy.
#
#
# For running this on your own computer (jessie), see https://wiki.debian.org/mk-sbuild
# for information on setting up sbuild.
# Short version: 1) apt-get install ubuntu-dev-tools 2) mk-sbuild jessie
#
# To CHANGE the golden image: sudo schroot -c source:jessie-amd64 -u root
# To ENTER an image snapshot: schroot -c jessie-amd64
# To BUILD within a snapshot: sbuild -A -d jessie-amd64 PACKAGE*.dsc

set -e
set -u

BINDISTS=${BINDISTS:-stretch}

rm -rf build
mkdir -p build
cd build

SOURCE=$(ls ../sources/varnish-*gz 2>/dev/null | tail -1)

tar xf "$SOURCE"

DIST_DIR=$(ls)

VERSION=$("$DIST_DIR"/configure --version | awk 'NR == 1 {print $NF}')

# VERSION looks like 5.2.1 or 5.2.0-rc1
MAJOR=${VERSION%.*}		# 5.2
MINOR=${VERSION##*.}		# 1 or 0-rc1
MINOR=${MINOR%%-*}		# 1 or 0
RELEASE=${VERSION#*-}		# 5.2.1 or rc1
RELEASE=${RELEASE#$VERSION}	# '' or rc1
BUILD_NUMBER=${BUILD_NUMBER:-none}
BUILD_ID=${BUILD_ID:-none}

# Take version override set on Jenkins builds into account.
if [ -n "${WEEKLY_VERSION:-}" ]
then
	VERSION=$WEEKLY_VERSION
	RELEASE=
	DEBVERSION=weekly
	DCH_TEXT="Release build #$BUILD_NUMBER ID: $BUILD_ID"
elif [ -n "${DEBVERSION:-}" ]
then
	VERSION="$MAJOR.$MINOR"
	DEBVERSION="${DEBVERSION:-}"
	DCH_TEXT="Release build #$BUILD_NUMBER ID: $BUILD_ID"
elif [ "${VERSION}" = "trunk" ]
then
	VERSION=$(date +%Y%m%d%H%M%S)
	RELEASE=
	DEBVERSION=trunk
	DCH_TEXT="Trunk build from git"
else
	VERSION="$MAJOR.$MINOR"
	DEBVERSION="0${RELEASE}+daily+$(date +%Y%m%d.%H%M%S)"
	RELEASE=
	# XXX: why move the RELEASE inside the DEBVERSION?
	DCH_TEXT="Automatic build from git"
fi

FULL_VERSION="$VERSION${RELEASE:+~}$RELEASE-$DEBVERSION"

cp -r -L ../debian "$DIST_DIR"/

sed -i -e "s|@VERSION@|$FULL_VERSION|"  "$DIST_DIR/debian/changelog"

tar zcf "$DIST_DIR.orig.tar.gz" "$DIST_DIR"/

cd "$DIST_DIR"

dch -v "$FULL_VERSION" "$DCH_TEXT"

# Generate the source package used by subsequent sbuilds
dpkg-buildpackage -us -uc -S -j10 -d

# Back to build/
cd ..

# By now we are done setting up and building the source package.

# Build binary packages for the requested releases inside chroots.
for dist in $BINDISTS; do
	# Legacy packages embedded the release into the package version.
	export DEBIAN_OVERRIDE_BINARY_VERSION="$FULL_VERSION~$dist"
	sbuild -v -A -c "$dist-amd64-sbuild" -d "$dist" varnish*.dsc
done