#!/bin/sh
#
# This script will build a .deb from a git snapshot of koha.
# Don't use it for building actual versions for uploading to Debian.
#
# To use:
# - commit any changes into git
# - run this script

set -e

die()
{
    echo "$@"
    exit 1
}

everything_is_commited()
{
    if git status --short | grep -q '^'
    then
        return 1
    else
        return 0
    fi
}

latest_sha1() {
    git rev-parse --short=8 HEAD
}

newversion() {
    printf '3.2~git%s.%s' $(date +%Y%m%d%H%M%S) $(latest_sha1)
}

adjust_debian_changelog() {
    dch --force-distribution -D squeeze-dev -v "$1" \
        "Building git snapshot."
    dch -r "Building git snapshot."
}

reset_debian_changelog() {
    git checkout -- debian/changelog
}

build_package() {
    git archive --format=tar --prefix="koha-$1/" HEAD | 
        gzip -9 > "../koha_$1.tar.gz"
    pdebuild
}

if ! everything_is_commited
then
    die "cannot build: uncommited changes"
fi

version="$(newversion)"
adjust_debian_changelog "$version"
build_package "$version"
reset_debian_changelog