#!/bin/bash

readonly THISSCRIPT=$0
readonly DISTRIB=$1
readonly BRANCH=$2
readonly FOLDER=$3

source /home/vinaigrette/config/config
source /home/vinaigrette/scripts/common.sh

export DEBSIGN_KEYID
export DEBFULLNAME
export DEBEMAIL

readonly IMG="${PBUILDER_IMAGES}/${DISTRIB}-amd64.tgz"

# ##### #
# Usage #
# ##### #

function usage()
{
    cat << EOF

Usage:
  $THISSCRIPT <distrib> <branch> <folder>

Arguments:
  <distrib>     stretch (can only build for stretch, no jessie)
  <branch>      stable, testing, or unstable
  <folder>      the folder in which to build...
EOF
}


function main()
{
    validate_arguments
    retrieve_package_info
    build_sources
    add_to_reprepro

    success "Build will start soon. See 'rebuildd-job list | tail'"
    sendxmpppy "Added builds for ${PACKAGE}/${VERSION} in branch ${BRANCH} ..."
}

# ################# #
# Check user inputs #
# ################# #

function validate_arguments()
{
    [[ $DISTRIB =~ ^stretch$ ]] || critical "Invalid distribution $DISTRIB"
    [[ $BRANCH =~ ^testing|stable|unstable$ ]] || critical "Invalid branch $BRANCH"
    [[ ! -z "$FOLDER" ]] || critical "Need a folder in which to build"
}

function retrieve_package_info()
{
    readonly PKG_DIR=$(readlink -fn $FOLDER)
    readonly ROOT_DIR=$(readlink -fn ${PKG_DIR}/../)
    cd $PKG_DIR

    readonly PACKAGE=$(dpkg-parsechangelog | awk '/^Source: / {print $2}')
    readonly VERSION=$(dpkg-parsechangelog | awk '/^Version: / {print $2}')
    readonly CHANGES_FILE=${ROOT_DIR}/${PACKAGE}_${VERSION}_source.changes
}

# ######################################## #
# Invoke pbuilder to build the sources ... #
# ######################################## #

function build_sources()
{
    boxed "Building source package of ${PACKAGE} ${VERSION} ..."

    pbuilder execute --bindmounts ${ROOT_DIR} --basetgz ${IMG} -- ${BUILD_SOURCES} $PKG_DIR \
	    || critical "An error occured while building source package"

    [[ -f ${CHANGES_FILE} ]] || critical "An error occured while building source package (no change file available)"
}

function add_to_reprepro()
{
    boxed "Adding ${PACKAGE}_${VERSION} to ${DISTRIB}/${BRANCH}..."

    $INCLUDE_CHANGES $DISTRIB $BRANCH $CHANGES_FILE || critical "An error occured while including source package"
}

[[ "$1" =~ ^-h|--help$ ]] && (usage; exit 0) || main