#!/bin/bash

QUIET_ARG=""
[[ "$1" == "--quiet" ]] && QUIET_ARG="--quiet"

# Enter source directory
cd "$( dirname "$0" )" || exit

CHECK_FILE="$( find "." -name 'check_*' ! -name '*~' -type f -executable | head -n 1 )"
PACKAGE_NAME="$( basename "$CHECK_FILE" | tr '_' '-' )"

echo "Clean previous build..."
rm -fr dist

echo "Detect version using git describe..."
VERSION="$( git describe --tags|sed 's/^[^0-9]*//' )"

echo "Create building environemt..."
BDIR="dist/$PACKAGE_NAME-$VERSION"
mkdir -p "$BDIR"
RSYNC_ARG=""
[[ -z "$QUIET_ARG" ]] && RSYNC_ARG="-v"
rsync -a "$RSYNC_ARG" debian/ "$BDIR/debian/"
cp "$CHECK_FILE" "$BDIR/"

echo "Set VERSION=$VERSION in gitdch using sed..."
sed -i "s/^VERSION *=.*$/VERSION = '$VERSION'/" "$BDIR/$( basename "$CHECK_FILE" )"

if [[ -z "$DEBIAN_CODENAME" ]]; then
	echo "Retrieve debian codename using lsb_release..."
	DEBIAN_CODENAME=$( lsb_release -c -s )
else
	echo "Use debian codename from environment ($DEBIAN_CODENAME)"
fi

echo "Generate debian changelog using gitdch..."
GITDCH_ARGS=('--verbose')
[[ -n "$QUIET_ARG" ]] && GITDCH_ARGS=('--warning')
if [[ -n "$MAINTAINER_NAME" ]]; then
	echo "Use maintainer name from environment ($MAINTAINER_NAME)"
	GITDCH_ARGS+=("--maintainer-name" "${MAINTAINER_NAME}")
fi
if [[ -n "$MAINTAINER_EMAIL" ]]; then
	echo "Use maintainer email from environment ($MAINTAINER_EMAIL)"
	GITDCH_ARGS+=("--maintainer-email" "$MAINTAINER_EMAIL")
fi
gitdch \
	--package-name "$PACKAGE_NAME" \
	--version "${VERSION}" \
	--code-name "$DEBIAN_CODENAME" \
	--output "$BDIR"/debian/changelog \
	--release-notes dist/release_notes.md \
	"${GITDCH_ARGS[@]}"

if [[ -n "$MAINTAINER_NAME" ]] && [[ -n "$MAINTAINER_EMAIL" ]]; then
	echo "Set Maintainer field in debian control file ($MAINTAINER_NAME <$MAINTAINER_EMAIL>)..."
	sed -i "s/^Maintainer: .*$/Maintainer: $MAINTAINER_NAME <$MAINTAINER_EMAIL>/" \
		"$BDIR"/debian/control
fi

echo "Build debian package..."
cd "$BDIR" || exit
dpkg-buildpackage