#!/bin/sh

# maintained in git at ssh://git.mdcc.cx/git/ad1810-stuff.git
# ( view recent version online at
#    http://mdcc.cx/git/wd/ad1810-stuff/scripts/a1-build-deb-ez )

# Copyright (C) 2016 Tilburg University http://www.uvt.nl/
# Author: Joost van Baal-Ilić <joostvb-a1-build-deb-ez /a/ mdcc /dot/ cx>
#
# This program 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.
#
# This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.


# a1-build-deb-ez -- build a .deb from an upstream source and a debian
# directory, the "easy" way.
#  to be called from a directory holding a file debian/changelog

# based upon
# https://svn.uvt.nl/its-id/trunk/sources/deb-accountchecker/engage

# used by:

#svn/its-id/sources/ :
#
#deb-accountchecker/debian
#pwdmodifier/deb-gatekeeper/debian
#deb-ldapbrowser/debian
#
#
#( both
#
#pwdmodifier/libpwdmodifier/debian
#
#and
#
#libpwdmodifier/debian
#
#??? )


# uses tar.xz or runs ./bootstrap && ./configure && make distcheck
# runs debuild

set -ex

opwd=`pwd`
source=$( dpkg-parsechangelog --show-field Source )

debian_version=$( dpkg-parsechangelog --show-field Version )
# e.g. 1.4-1

# FIXME we do not support epochs
upstream_version=$( echo $debian_version | sed 's/-.*$//' )
upstream_txz=${source}-${upstream_version}.tar.xz
upstream_path=$opwd/../$source
upstream_txz_path=$upstream_path/$upstream_txz


##tmp=$(mktemp --tmpdir=/dev/shm -d)

# comment this line to debug
## trap 'rm -rf -- "$tmp"' INT QUIT EXIT

#svn=$HOME/sources/deb-ldapbrowser
#svn=https://svn.uvt.nl/its-id/trunk/sources/accountchecker
#svn export $svn $tmp/svn
##cd $tmp

if test -f $upstream_txz_path
then
    echo found $upstream_txz_path, reusing it
else
    echo File $upstream_txz_path not found, please make sure it is available.
    echo Giving up.
    exit 1
fi

# this code only works if upstream uses to ship a NEWS file...
if false
then
    # generating $upstream_txz_path
    cd $upstream_path

    # AC_INIT([accountchecker], [1.4])
    ### FAIL upstream_upstream_version=$(grep AC_INIT configure.ac | sed 's/^[^ ]*, \[\([^\]]*\)\])$/\1/')
    upstream_upstream_version=$(egrep '^[0-9]+' NEWS | \
      sed 's/^\([^ ]*\) .*$/\1/' | head -1)

    if test $upstream_upstream_version = $upstream_version
    then
        cat <<EOT
*******************************************
*** Upstream sources are up to date: $upstream_upstream_version
*** Generating $upstream_txz_path...
********************************************
EOT
        ./bootstrap && ./configure && make distcheck
    else
        set +x
        echo
        echo Upstream version skewness: version $upstream_upstream_version as found in 
        echo $upstream_path/NEWS
        echo is not equal to version $upstream_version as found in debian/changelog by dpkg-parsechangelog.
        echo Please record changes and update the version in one of those 2 files.
        echo Giving up
        exit 1
    fi
fi


test -f $upstream_txz || cp $upstream_txz_path .
test -L ${source}_${upstream_version}.orig.tar.xz || \
  ln -s $upstream_txz ${source}_${upstream_version}.orig.tar.xz
test -d ${source}-${upstream_version} && rm -r ${source}-${upstream_version}
tar xf $upstream_txz
mkdir --parents ${source}-${upstream_version}/debian
cd ${source}-${upstream_version}
cp -a $opwd/debian/* debian
debuild -uc -us
cd ..

# end of debug and build stuff
set +x

# show main result

cat <<EOT
********************
*** Job finished ***
********************
EOT

# ls -lhdtr ${source}*.deb

echo Generated files:
dcmd ${source}_${debian_version}_*.changes