#!/bin/bash
#   This file is part of nexdatas - Tango Server for NeXus data writer
#
#    Copyright (C) 2017-2017 DESY, Jan Kotanski <jkotan@mail.desy.de>
#
#    nexdatas is free software: you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation, either version 3 of the License, or
#    (at your option) any later version.
#
#    nexdatas is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with nexdatas.  If not, see <http://www.gnu.org/licenses/>.
#
set -e
for i in "${@:1}"
do
    if [[ $i == -* ]] ; then
	case $i in
	    -h=*|--help=*)
		HELP=YES
		;;
	    -e=*|--email=*)
		EMAIL="${i#*=}"
		;;
	    -f=*|--fullname=*)
		FULLNAME="${i#*=}"
		;;
	    -v=*|--version=*)
		export VERSION="${i#*=}"
		;;
	    -ne|--nodebenv)
		export NODEBENV=YES
		;;
	    -ns|--nosignature)
		export NOSIGNATURE=YES
		;;
	    -m|--merge)
		export MERGE=YES
		;;
	    -p|--patch)
		export PATCH=YES
		;;
	    -c|--continue)
		export CONTINUE=YES
		;;
	    -r=*|--release=*)
		export RELEASE="${i#*=}"
		;;
	    *)
		# unknown option
		;;
	esac
    else
	export TARBALL=$i
    fi
done

DEFRELEASE=jessie

if [[ ! -z $HELP ]] && [[ -z $PACKAGE ]] ; then
    echo "Error: PACKAGE variable is not defined"
fi
if [[ ! -z $HELP ]] || [[ -z $PACKAGE ]] ; then
    echo "pidpbuild version 1.3.1"
    echo ""
    echo "usage: pidpbuild [<TARBALL>] [-v=<VERSION>] [-ns|--no-signature]"
    echo "                 [-e=<DEBEMAIL>] [-f=<DEBFULLNAME>] [-ne|--nodebenv]"
    echo "                 [-p|--patch] [-c|--continue] [-h|--help]"
    echo ""
    echo "build the new debian package (after running pidpclone):"
    echo "  if TARBALL is present the new source is used"
    echo "  if pidpclone --patch option was used the new patch is created"
    echo ""
    echo "possible arguments:"
    echo "  TARBALL               source tarball, i.e. *.tar.gz (optional)"
    echo ""
    echo "optional arguments:"
    echo "  -h, --help            show this help message and exit"
    echo "  -v=, --version=       new debian package version, i.e. 1.1.2-4"
    echo "  -ns, --nosiganture    don't sign the package"
    echo "  -ne, --nodebenv       don't set default DEBFULLNAME and DEBEMAIL"
    echo "  -f=, --fullname=      debian fullname of the gpg signature,"
    echo "                          i.e. DEBFULLNAME"
    echo "  -e=, --email=         debian email of the gpg signature,"
    echo "                          i.e.  DEBEMAIL"
    echo "  -r=, --release=       debian release flavour, e.g. jessie, wheezy"
    echo "  -m, --merge           upstream/* merged into debian/*"
    echo "                          by default: replace is performed"
    echo "  -p, --patch           the patching procedure"
    echo "  -c, --continue        continue the built of the debian package, e.g.:"
    echo "                        after a conflict detected between patches "
    echo "                        and the new source tarball or "
    echo "                        after creating a new repository "
    echo ""
    echo "examples:"
    echo "  pidpbuild"
    echo "  pidpbuild ../nexdatas.extrasp09-1.2.4.tar.gz"
    echo "  pidpbuild --continue"
    echo "  pidpbuild -v=1.3.2-4"
    echo ""
else
    if [ -z $CONTINUE ] ; then
	CDIR=${PWD##*/}
	if ! [[ "$CDIR" == "$PACKAGE" ]] ; then
	    cd $PACKAGE
	fi
	git clean -f -d
	if [ -z $NODEBENV ] ; then
	    if [[ -z $DEBEMAIL ]] ; then
		export DEBEMAIL="fsec-devel@desy.de"
	    fi
	    if [[ -z $DEBFULLNAME ]] ; then
		export DEBFULLNAME="FS-EC DESY Group"
	    fi
	fi
	if [[ ! -z $FULLNAME ]] ; then
	    export DEBFULLNAME=$FULLNAME
	fi
	if [[ ! -z $EMAIL ]] ; then
	    export DEBEMAIL=$EMAIL
	fi
	if [[ -z $RELEASE ]] ; then
	    export RELEASE=$DEFRELEASE
	fi
	echo ""
	echo "  DEBFULLNAME=\"$DEBFULLNAME\""
	echo "  DEBEMAIL=\"$DEBEMAIL\""
	echo ""
	if [[ -z $VERSION ]] ; then
	    RE='^[0-9]+$'
	    read -r FIRSTLINE < debian/changelog
	    ARR=($FIRSTLINE)
	    VER=(${ARR[1]})
	    OLDVERSION=$(echo $VER | tr -d '()')
	    # OLDVERSION=2016.10.12-0.2+deb8u1~fsec
	    IFS='-' read -r SRCVERSION DEBVERSION <<< $OLDVERSION
	    IFS='~' read -r PREVERSION VERSION3  <<< $DEBVERSION
	    IFS='+' read -r VERSION1 VERSION2  <<< $PREVERSION
	    IFS='.' read -r VERSION1A VERSION1B  <<< $VERSION1
	    IFS='\n'
	    if [[ -n $VERSION1B ]] ; then
		if [[ $VERSION1B =~ $RE ]] ; then
		    VERSION1B=$((VERSION1B+1))
		    VERSION1=$VERSION1A.$VERSION1B
		else
		    echo "ERROR: Wrong version number" >&2; exit 1
		    exit
		fi
	    else
		if [[ $VERSION1A =~ $RE ]] ; then
		    VERSION1A=$((VERSION1A+1))
		    VERSION1=$VERSION1A
		else
		    echo "ERROR: Wrong version number" >&2; exit 1
		fi
	    fi
	    NEWVERSION=$SRCVERSION-$VERSION1
	    if [[ -n $VERSION2 ]] ; then
		NEWVERSION=$NEWVERSION+$VERSION2
	    fi
	    if [[ -n $VERSION3 ]] ; then
		NEWVERSION=$NEWVERSION+$VERSION3
	    fi
	fi
	if ! [[ -z $PATCH ]] ; then
	    git commit -a -m 'fast fix' || true
	    gbp pq export
	    git add debian/patches || true

	    if [[ $(git diff --cached --exit-code) && $? ]] ; then
		git commit
	    fi
	    gbp pq drop
	fi
	if ! [[ -z $TARBALL ]] ; then
	    if [[ -d "debian/patches" ]] ; then
		if [[ "$(ls -A debian/patches)" ]] ; then
		    gbp pq import
		    git checkout debian/$RELEASE
		fi
	    fi
	    git clean -f -d
	    if [[ -f $TARBALL ]] ; then
		if [[ -z $MERGE ]] ; then
		    gbp import-orig "$TARBALL" --merge-mode=replace
		else
		    gbp import-orig "$TARBALL" --merge-mode=merge
		fi
	    else
		echo "Error: $TARBALL cannot be found" ; exit 1
	    fi
	    if [[ -z $VERSION ]] ; then
		TB=${TARBALL::-7}
		VER=${TB##*-}
		NEWVERSION=${VER##*_}-1
	    fi
	    echo "VERSION $NEWVERSION"
	fi
	if ! [[ -z $NEWVERSION ]] ; then
	    VERSION=$NEWVERSION
	fi

	gbp dch -R -N $VERSION
	git commit -a -m "update changelog"
	git clean -f -d

	if ! [[ -z $TARBALL ]] ; then
	    if [[ -d "debian/patches" ]] ; then
		if [[ "$(ls -A debian/patches)" ]] ; then
		    set +e
		    gbp pq rebase
		    if [[ ! $? -eq 0 ]]; then
			echo ""
			echo "Conflict between tarball and patches"
			echo "1) Correct the source files or/and patches"
			echo "2) Stage your changes, i.e. with git add ..."
			echo "3) Execute \"pidpbuild --continue\""
			exit 1
		    fi
		    set -e
		    gbp pq export
		    git add debian/patches
		    if [[ $(git diff --cached --exit-code) && $? ]] ; then
			git commit
		    fi
		fi
	    fi
	fi
    else
	if [[ -d "debian/patches" ]] ; then
	    if [[ "$(ls -A debian/patches)" ]] ; then
		git rebase --continue
		if ! [[ $? -eq 0 ]]; then
		    echo "Conflict between tarball and patches"
		    echo "1) Correct the source files or/and patches"
		    echo "2) Stage your changes, i.e. with git add ..."
		    echo "3) Execute \"pidpbuild --continue\""
		    exit 1
		fi
		gbp pq export
		git add debian/patches || true
		if [[ $(git diff --cached --exit-code) && $? ]] ; then
		    git commit
		fi
	    fi
	fi
    fi
    git clean -f -d
    if [[ -z $NOSIGNATURE ]] ; then
	gbp buildpackage --git-tag
    else
	gbp buildpackage -us -uc --git-tag
    fi
    if [[ ! -z $PIDTOKILL ]] ; then
	(sleep 1 && kill -TERM $PPID $PIDTOKILL &)
    fi
fi